/* PowerPC-specific support for 32-bit ELF
- Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003
- Free Software Foundation, Inc.
+ Copyright 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
+ 2004, 2005 Free Software Foundation, Inc.
Written by Ian Lance Taylor, Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
/* Offset of tp and dtp pointers from start of TLS block. */
#define TP_OFFSET 0x7000
#define DTP_OFFSET 0x8000
-
-\f
-/* Enumeration to specify the special section. */
-enum elf_linker_section_enum
-{
- LINKER_SECTION_SDATA,
- LINKER_SECTION_SDATA2
-};
-
-/* Sections created by the linker. */
-
-typedef struct elf_linker_section
-{
- /* pointer to the section */
- asection *section;
- /* pointer to the relocations needed for this section */
- asection *rel_section;
- /* pointer to the created symbol hash value */
- struct elf_link_hash_entry *sym_hash;
- /* offset of symbol from beginning of section */
- bfd_vma sym_offset;
-} elf_linker_section_t;
-
-/* Linked list of allocated pointer entries. This hangs off of the
- symbol lists, and provides allows us to return different pointers,
- based on different addend's. */
-
-typedef struct elf_linker_section_pointers
-{
- /* next allocated pointer for this symbol */
- struct elf_linker_section_pointers *next;
- /* offset of pointer from beginning of section */
- bfd_vma offset;
- /* addend used */
- bfd_vma addend;
- /* which linker section this is */
- elf_linker_section_t *lsect;
- /* whether address was written yet */
- bfd_boolean written_address_p;
-} elf_linker_section_pointers_t;
-
-struct ppc_elf_obj_tdata
-{
- struct elf_obj_tdata elf;
-
- /* A mapping from local symbols to offsets into the various linker
- sections added. This is index by the symbol index. */
- elf_linker_section_pointers_t **linker_section_pointers;
-};
-
-#define ppc_elf_tdata(bfd) \
- ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
-
-#define elf_local_ptr_offsets(bfd) \
- (ppc_elf_tdata (bfd)->linker_section_pointers)
-
-/* Override the generic function because we store some extras. */
-
-static bfd_boolean
-ppc_elf_mkobject (bfd *abfd)
-{
- bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
- abfd->tdata.any = bfd_zalloc (abfd, amt);
- if (abfd->tdata.any == NULL)
- return FALSE;
- return TRUE;
-}
-
-/* The PPC linker needs to keep track of the number of relocs that it
- decides to copy as dynamic relocs in check_relocs for each symbol.
- This is so that it can later discard them if they are found to be
- unnecessary. We store the information in a field extending the
- regular ELF linker hash table. */
-
-struct ppc_elf_dyn_relocs
-{
- struct ppc_elf_dyn_relocs *next;
-
- /* The input section of the reloc. */
- asection *sec;
-
- /* Total number of relocs copied for the input section. */
- bfd_size_type count;
-
- /* Number of pc-relative relocs copied for the input section. */
- bfd_size_type pc_count;
-};
-
-/* PPC ELF linker hash entry. */
-
-struct ppc_elf_link_hash_entry
-{
- struct elf_link_hash_entry elf;
-
- /* If this symbol is used in the linker created sections, the processor
- specific backend uses this field to map the field into the offset
- from the beginning of the section. */
- elf_linker_section_pointers_t *linker_section_pointer;
-
- /* Track dynamic relocs copied for this symbol. */
- struct ppc_elf_dyn_relocs *dyn_relocs;
-
- /* Contexts in which symbol is used in the GOT (or TOC).
- TLS_GD .. TLS_TLS bits are or'd into the mask as the
- corresponding relocs are encountered during check_relocs.
- tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
- indicate the corresponding GOT entry type is not needed. */
-#define TLS_GD 1 /* GD reloc. */
-#define TLS_LD 2 /* LD reloc. */
-#define TLS_TPREL 4 /* TPREL reloc, => IE. */
-#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
-#define TLS_TLS 16 /* Any TLS reloc. */
-#define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
- char tls_mask;
-};
-
-#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
-
-/* PPC ELF linker hash table. */
-
-struct ppc_elf_link_hash_table
-{
- struct elf_link_hash_table elf;
-
- /* Short-cuts to get to dynamic linker sections. */
- asection *got;
- asection *relgot;
- asection *plt;
- asection *relplt;
- asection *dynbss;
- asection *relbss;
- asection *dynsbss;
- asection *relsbss;
- elf_linker_section_t *sdata;
- elf_linker_section_t *sdata2;
- asection *sbss;
-
- /* Shortcut to .__tls_get_addr. */
- struct elf_link_hash_entry *tls_get_addr;
-
- /* TLS local dynamic got entry handling. */
- union {
- bfd_signed_vma refcount;
- bfd_vma offset;
- } tlsld_got;
-
- /* Small local sym to section mapping cache. */
- struct sym_sec_cache sym_sec;
-};
-
-/* Get the PPC ELF linker hash table from a link_info structure. */
-
-#define ppc_elf_hash_table(p) \
- ((struct ppc_elf_link_hash_table *) (p)->hash)
-
-/* Create an entry in a PPC ELF linker hash table. */
-
-static struct bfd_hash_entry *
-ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
- struct bfd_hash_table *table,
- const char *string)
-{
- /* Allocate the structure if it has not already been allocated by a
- subclass. */
- if (entry == NULL)
- {
- entry = bfd_hash_allocate (table,
- sizeof (struct ppc_elf_link_hash_entry));
- if (entry == NULL)
- return entry;
- }
-
- /* Call the allocation method of the superclass. */
- entry = _bfd_elf_link_hash_newfunc (entry, table, string);
- if (entry != NULL)
- {
- ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
- ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
- ppc_elf_hash_entry (entry)->tls_mask = 0;
- }
-
- return entry;
-}
-
-/* Create a PPC ELF linker hash table. */
-
-static struct bfd_link_hash_table *
-ppc_elf_link_hash_table_create (bfd *abfd)
-{
- struct ppc_elf_link_hash_table *ret;
-
- ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
- if (ret == NULL)
- return NULL;
-
- if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
- ppc_elf_link_hash_newfunc))
- {
- free (ret);
- return NULL;
- }
-
- return &ret->elf.root;
-}
-
-/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
- copying dynamic variables from a shared lib into an app's dynbss
- section, and instead use a dynamic relocation to point into the
- shared lib. */
-#define ELIMINATE_COPY_RELOCS 1
-
-/* Copy the extra info we tack onto an elf_link_hash_entry. */
-
-static void
-ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed,
- struct elf_link_hash_entry *dir,
- struct elf_link_hash_entry *ind)
-{
- struct ppc_elf_link_hash_entry *edir, *eind;
-
- edir = (struct ppc_elf_link_hash_entry *) dir;
- eind = (struct ppc_elf_link_hash_entry *) ind;
-
- if (eind->dyn_relocs != NULL)
- {
- if (edir->dyn_relocs != NULL)
- {
- struct ppc_elf_dyn_relocs **pp;
- struct ppc_elf_dyn_relocs *p;
-
- if (ind->root.type == bfd_link_hash_indirect)
- abort ();
-
- /* Add reloc counts against the weak sym to the strong sym
- list. Merge any entries against the same section. */
- for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
- {
- struct ppc_elf_dyn_relocs *q;
-
- for (q = edir->dyn_relocs; q != NULL; q = q->next)
- if (q->sec == p->sec)
- {
- q->pc_count += p->pc_count;
- q->count += p->count;
- *pp = p->next;
- break;
- }
- if (q == NULL)
- pp = &p->next;
- }
- *pp = edir->dyn_relocs;
- }
-
- edir->dyn_relocs = eind->dyn_relocs;
- eind->dyn_relocs = NULL;
- }
-
- edir->tls_mask |= eind->tls_mask;
-
- if (ELIMINATE_COPY_RELOCS
- && ind->root.type != bfd_link_hash_indirect
- && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
- /* If called to transfer flags for a weakdef during processing
- of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
- We clear it ourselves for ELIMINATE_COPY_RELOCS. */
- dir->elf_link_hash_flags |=
- (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
- | ELF_LINK_HASH_REF_REGULAR
- | ELF_LINK_HASH_REF_REGULAR_NONWEAK
- | ELF_LINK_HASH_NEEDS_PLT));
- else
- _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
-}
\f
static reloc_howto_type *ppc_elf_howto_table[R_PPC_max];
0xffff, /* dst_mask */
FALSE), /* pcrel_offset */
- /* Phony relocs to handle branch stubs. */
- HOWTO (R_PPC_RELAX32, /* type */
+ /* GNU extension to record C++ vtable hierarchy. */
+ HOWTO (R_PPC_GNU_VTINHERIT, /* type */
0, /* rightshift */
- 0, /* size */
+ 0, /* size (0 = byte, 1 = short, 2 = long) */
0, /* bitsize */
FALSE, /* pc_relative */
0, /* bitpos */
complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_PPC_RELAX32", /* name */
- FALSE, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- FALSE), /* pcrel_offset */
-
- HOWTO (R_PPC_RELAX32PC, /* type */
- 0, /* rightshift */
- 0, /* size */
- 0, /* bitsize */
- FALSE, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- bfd_elf_generic_reloc, /* special_function */
- "R_PPC_RELAX32PC", /* name */
- FALSE, /* partial_inplace */
- 0, /* src_mask */
- 0, /* dst_mask */
- FALSE), /* pcrel_offset */
-
- /* GNU extension to record C++ vtable hierarchy. */
- HOWTO (R_PPC_GNU_VTINHERIT, /* type */
- 0, /* rightshift */
- 0, /* size (0 = byte, 1 = short, 2 = long) */
- 0, /* bitsize */
- FALSE, /* pc_relative */
- 0, /* bitpos */
- complain_overflow_dont, /* complain_on_overflow */
- NULL, /* special_function */
- "R_PPC_GNU_VTINHERIT", /* name */
+ NULL, /* special_function */
+ "R_PPC_GNU_VTINHERIT", /* name */
FALSE, /* partial_inplace */
0, /* src_mask */
0, /* dst_mask */
ppc_elf_howto_table[type] = &ppc_elf_howto_raw[i];
}
}
-\f
-#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
-
-static const int shared_stub_entry[] =
- {
- 0x7c0802a6, /* mflr 0 */
- 0x429f0005, /* bcl 20, 31, .Lxxx */
- 0x7d6802a6, /* mflr 11 */
- 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
- 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
- 0x7c0803a6, /* mtlr 0 */
- 0x7d6903a6, /* mtctr 11 */
- 0x4e800420, /* bctr */
- };
-
-static const int stub_entry[] =
- {
- 0x3d600000, /* lis 11,xxx@ha */
- 0x396b0000, /* addi 11,11,xxx@l */
- 0x7d6903a6, /* mtctr 11 */
- 0x4e800420, /* bctr */
- };
-
-static bfd_boolean
-ppc_elf_relax_section (bfd *abfd,
- asection *isec,
- struct bfd_link_info *link_info,
- bfd_boolean *again)
+static reloc_howto_type *
+ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
+ bfd_reloc_code_real_type code)
{
- struct one_fixup
- {
- struct one_fixup *next;
- asection *tsec;
- bfd_vma toff;
- bfd_vma trampoff;
- };
+ enum elf_ppc_reloc_type r;
- Elf_Internal_Shdr *symtab_hdr;
- bfd_byte *contents = NULL;
- Elf_Internal_Sym *isymbuf = NULL;
- Elf_Internal_Rela *internal_relocs = NULL;
- Elf_Internal_Rela *irel, *irelend;
- struct one_fixup *fixups = NULL;
- bfd_boolean changed;
- struct ppc_elf_link_hash_table *ppc_info;
- bfd_size_type trampoff;
+ /* Initialize howto table if not already done. */
+ if (!ppc_elf_howto_table[R_PPC_ADDR32])
+ ppc_elf_howto_init ();
- *again = FALSE;
+ switch (code)
+ {
+ default:
+ return NULL;
- /* Nothing to do if there are no relocations and no need for
- the relax finalize pass. */
- if ((isec->flags & SEC_RELOC) == 0
- || isec->reloc_count == 0
- || link_info->relax_finalizing)
- return TRUE;
+ case BFD_RELOC_NONE: r = R_PPC_NONE; break;
+ case BFD_RELOC_32: r = R_PPC_ADDR32; break;
+ case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
+ case BFD_RELOC_16: r = R_PPC_ADDR16; break;
+ case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
+ case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
+ case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
+ case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
+ case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
+ case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
+ case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
+ case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
+ case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
+ case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
+ case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
+ case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
+ case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
+ case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
+ case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
+ case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
+ case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
+ case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
+ case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
+ case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
+ case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
+ case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
+ case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
+ case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
+ case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
+ case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
+ case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
+ case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
+ case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
+ case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
+ case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
+ case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
+ case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
+ case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
+ case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
+ case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
+ case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
+ case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
+ case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
+ case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
+ case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
+ case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
+ case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
+ case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
+ case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
+ case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
+ case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
+ case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
+ case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
+ case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
+ case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
+ case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
+ case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
+ case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
+ case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
+ case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
+ case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
+ case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
+ case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
+ case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
+ case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
+ case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
+ case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
+ case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
+ case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
+ case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
+ case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
+ case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
+ case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
+ case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
+ case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
+ case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
+ case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
+ case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
+ case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
+ case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
+ case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
+ }
- /* If needed, initialize this section's cooked size. */
- if (isec->_cooked_size == 0)
- isec->_cooked_size = isec->_raw_size;
+ return ppc_elf_howto_table[r];
+};
- trampoff = (isec->_cooked_size + 3) & (bfd_vma) -4;
- /* Space for a branch around any trampolines. */
- trampoff += 4;
+/* Set the howto pointer for a PowerPC ELF reloc. */
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+static void
+ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
+ arelent *cache_ptr,
+ Elf_Internal_Rela *dst)
+{
+ /* Initialize howto table if not already done. */
+ if (!ppc_elf_howto_table[R_PPC_ADDR32])
+ ppc_elf_howto_init ();
- /* Get a copy of the native relocations. */
- internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
- link_info->keep_memory);
- if (internal_relocs == NULL)
- goto error_return;
+ BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
+ cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
+}
- ppc_info = ppc_elf_hash_table (link_info);
- irelend = internal_relocs + isec->reloc_count;
+/* Handle the R_PPC_ADDR16_HA reloc. */
- /* Get the section contents. */
- /* Get cached copy if it exists. */
- if (elf_section_data (isec)->this_hdr.contents != NULL)
- contents = elf_section_data (isec)->this_hdr.contents;
- else
- {
- /* Go get them off disk. */
- contents = bfd_malloc (isec->_raw_size);
- if (contents == NULL)
- goto error_return;
+static bfd_reloc_status_type
+ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
+ arelent *reloc_entry,
+ asymbol *symbol,
+ void *data ATTRIBUTE_UNUSED,
+ asection *input_section,
+ bfd *output_bfd,
+ char **error_message ATTRIBUTE_UNUSED)
+{
+ bfd_vma relocation;
- if (!bfd_get_section_contents (abfd, isec, contents, 0, isec->_raw_size))
- goto error_return;
+ if (output_bfd != NULL)
+ {
+ reloc_entry->address += input_section->output_offset;
+ return bfd_reloc_ok;
}
- for (irel = internal_relocs; irel < irelend; irel++)
- {
- unsigned long r_type = ELF32_R_TYPE (irel->r_info);
- bfd_vma symaddr, reladdr, toff, roff;
- asection *tsec;
- struct one_fixup *f;
- size_t insn_offset = 0;
- bfd_vma max_branch_offset, val;
- bfd_byte *hit_addr;
- unsigned long t0;
+ if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
+ return bfd_reloc_outofrange;
- switch (r_type)
- {
- case R_PPC_REL24:
- case R_PPC_LOCAL24PC:
- case R_PPC_PLTREL24:
- max_branch_offset = 1 << 25;
- break;
+ if (bfd_is_com_section (symbol->section))
+ relocation = 0;
+ else
+ relocation = symbol->value;
- case R_PPC_REL14:
- case R_PPC_REL14_BRTAKEN:
- case R_PPC_REL14_BRNTAKEN:
- max_branch_offset = 1 << 15;
- break;
+ relocation += symbol->section->output_section->vma;
+ relocation += symbol->section->output_offset;
+ relocation += reloc_entry->addend;
- default:
- continue;
- }
+ reloc_entry->addend += (relocation & 0x8000) << 1;
- /* Get the value of the symbol referred to by the reloc. */
- if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
- {
- /* A local symbol. */
- Elf_Internal_Sym *isym;
+ return bfd_reloc_continue;
+}
- /* Read this BFD's local symbols. */
- if (isymbuf == NULL)
- {
- isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
- if (isymbuf == NULL)
- isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
- symtab_hdr->sh_info, 0,
- NULL, NULL, NULL);
- if (isymbuf == 0)
- goto error_return;
- }
- isym = isymbuf + ELF32_R_SYM (irel->r_info);
- if (isym->st_shndx == SHN_UNDEF)
- continue; /* We can't do anthing with undefined symbols. */
- else if (isym->st_shndx == SHN_ABS)
- tsec = bfd_abs_section_ptr;
- else if (isym->st_shndx == SHN_COMMON)
- tsec = bfd_com_section_ptr;
- else
- tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+static bfd_reloc_status_type
+ppc_elf_unhandled_reloc (bfd *abfd,
+ arelent *reloc_entry,
+ asymbol *symbol,
+ void *data,
+ asection *input_section,
+ bfd *output_bfd,
+ char **error_message)
+{
+ /* If this is a relocatable link (output_bfd test tells us), just
+ call the generic function. Any adjustment will be done at final
+ link time. */
+ if (output_bfd != NULL)
+ return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
+ input_section, output_bfd, error_message);
- toff = isym->st_value;
- }
- else
- {
- /* Global symbol handling. */
- unsigned long indx;
- struct elf_link_hash_entry *h;
+ if (error_message != NULL)
+ {
+ static char buf[60];
+ sprintf (buf, _("generic linker can't handle %s"),
+ reloc_entry->howto->name);
+ *error_message = buf;
+ }
+ return bfd_reloc_dangerous;
+}
+\f
+/* Sections created by the linker. */
- indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
- h = elf_sym_hashes (abfd)[indx];
+typedef struct elf_linker_section
+{
+ /* Pointer to the bfd section. */
+ asection *section;
+ /* Section name. */
+ const char *name;
+ /* Associated bss section name. */
+ const char *bss_name;
+ /* Associated symbol name. */
+ const char *sym_name;
+ /* Value of symbol. */
+ bfd_vma sym_val;
+} elf_linker_section_t;
- while (h->root.type == bfd_link_hash_indirect
- || h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
+/* Linked list of allocated pointer entries. This hangs off of the
+ symbol lists, and provides allows us to return different pointers,
+ based on different addend's. */
- if (r_type == R_PPC_PLTREL24
- && ppc_info->plt != NULL
- && h->plt.offset != (bfd_vma) -1)
- {
- tsec = ppc_info->plt;
- toff = h->plt.offset;
- }
- else if (h->root.type == bfd_link_hash_defined
- || h->root.type == bfd_link_hash_defweak)
- {
- tsec = h->root.u.def.section;
- toff = h->root.u.def.value;
- }
- else
- continue;
- }
+typedef struct elf_linker_section_pointers
+{
+ /* next allocated pointer for this symbol */
+ struct elf_linker_section_pointers *next;
+ /* offset of pointer from beginning of section */
+ bfd_vma offset;
+ /* addend used */
+ bfd_vma addend;
+ /* which linker section this is */
+ elf_linker_section_t *lsect;
+} elf_linker_section_pointers_t;
- /* If the branch and target are in the same section, you have
- no hope of adding stubs. We'll error out later should the
- branch overflow. */
- if (tsec == isec)
- continue;
+struct ppc_elf_obj_tdata
+{
+ struct elf_obj_tdata elf;
- toff += irel->r_addend;
- if (tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
- toff = _bfd_merged_section_offset (abfd, &tsec,
- elf_section_data (tsec)->sec_info,
- toff, 0);
+ /* A mapping from local symbols to offsets into the various linker
+ sections added. This is index by the symbol index. */
+ elf_linker_section_pointers_t **linker_section_pointers;
+};
- symaddr = tsec->output_section->vma + tsec->output_offset + toff;
+#define ppc_elf_tdata(bfd) \
+ ((struct ppc_elf_obj_tdata *) (bfd)->tdata.any)
- roff = irel->r_offset;
+#define elf_local_ptr_offsets(bfd) \
+ (ppc_elf_tdata (bfd)->linker_section_pointers)
- reladdr = (isec->output_section->vma
- + isec->output_offset
- + roff);
+/* Override the generic function because we store some extras. */
- /* If the branch is in range, no need to do anything. */
- if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
- continue;
+static bfd_boolean
+ppc_elf_mkobject (bfd *abfd)
+{
+ bfd_size_type amt = sizeof (struct ppc_elf_obj_tdata);
+ abfd->tdata.any = bfd_zalloc (abfd, amt);
+ if (abfd->tdata.any == NULL)
+ return FALSE;
+ return TRUE;
+}
- /* Look for an existing fixup to this address. */
- for (f = fixups; f ; f = f->next)
- if (f->tsec == tsec && f->toff == toff)
- break;
+/* Fix bad default arch selected for a 32 bit input bfd when the
+ default is 64 bit. */
- if (f == NULL)
- {
- size_t size;
- unsigned long stub_rtype;
+static bfd_boolean
+ppc_elf_object_p (bfd *abfd)
+{
+ if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
+ {
+ Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
- val = trampoff - roff;
- if (val >= max_branch_offset)
- /* Oh dear, we can't reach a trampoline. Don't try to add
- one. We'll report an error later. */
- continue;
+ if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
+ {
+ /* Relies on arch after 64 bit default being 32 bit default. */
+ abfd->arch_info = abfd->arch_info->next;
+ BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
+ }
+ }
+ return TRUE;
+}
- if (link_info->shared)
- {
- size = 4 * ARRAY_SIZE (shared_stub_entry);
- insn_offset = 12;
- stub_rtype = R_PPC_RELAX32PC;
- }
- else
- {
- size = 4 * ARRAY_SIZE (stub_entry);
- insn_offset = 0;
- stub_rtype = R_PPC_RELAX32;
- }
+/* Function to set whether a module needs the -mrelocatable bit set. */
- /* Hijack the old relocation. Since we need two
- relocations for this use a "composite" reloc. */
- irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
- stub_rtype);
- irel->r_offset = trampoff + insn_offset;
+static bfd_boolean
+ppc_elf_set_private_flags (bfd *abfd, flagword flags)
+{
+ BFD_ASSERT (!elf_flags_init (abfd)
+ || elf_elfheader (abfd)->e_flags == flags);
- /* Record the fixup so we don't do it again this section. */
- f = bfd_malloc (sizeof (*f));
- f->next = fixups;
- f->tsec = tsec;
- f->toff = toff;
- f->trampoff = trampoff;
- fixups = f;
+ elf_elfheader (abfd)->e_flags = flags;
+ elf_flags_init (abfd) = TRUE;
+ return TRUE;
+}
- trampoff += size;
- }
- else
- {
- val = f->trampoff - roff;
- if (val >= max_branch_offset)
- continue;
+/* Support for core dump NOTE sections. */
- /* Nop out the reloc, since we're finalizing things here. */
- irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
- }
+static bfd_boolean
+ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
+{
+ int offset;
+ unsigned int size;
- /* Fix up the existing branch to hit the trampoline. */
- hit_addr = contents + roff;
- switch (r_type)
- {
- case R_PPC_REL24:
- case R_PPC_LOCAL24PC:
- case R_PPC_PLTREL24:
- t0 = bfd_get_32 (abfd, hit_addr);
- t0 &= ~0x3fffffc;
- t0 |= val & 0x3fffffc;
- bfd_put_32 (abfd, t0, hit_addr);
- break;
+ switch (note->descsz)
+ {
+ default:
+ return FALSE;
- case R_PPC_REL14:
- case R_PPC_REL14_BRTAKEN:
- case R_PPC_REL14_BRNTAKEN:
- t0 = bfd_get_32 (abfd, hit_addr);
- t0 &= ~0xfffc;
- t0 |= val & 0xfffc;
- bfd_put_32 (abfd, t0, hit_addr);
- break;
- }
- }
+ case 268: /* Linux/PPC. */
+ /* pr_cursig */
+ elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
- /* Write out the trampolines. */
- changed = fixups != NULL;
- if (fixups != NULL)
- {
- const int *stub;
- bfd_byte *dest;
- bfd_vma val;
- int i, size;
+ /* pr_pid */
+ elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
- do
- {
- struct one_fixup *f = fixups;
- fixups = fixups->next;
- free (f);
- }
- while (fixups);
+ /* pr_reg */
+ offset = 72;
+ size = 192;
- contents = bfd_realloc (contents, trampoff);
- if (contents == NULL)
- goto error_return;
+ break;
+ }
- isec->_cooked_size = (isec->_cooked_size + 3) & (bfd_vma) -4;
- /* Branch around the trampolines. */
- val = trampoff - isec->_cooked_size + 0x48000000;
- dest = contents + isec->_cooked_size;
- isec->_cooked_size = trampoff;
- bfd_put_32 (abfd, val, dest);
- dest += 4;
+ /* Make a ".reg/999" section. */
+ return _bfd_elfcore_make_pseudosection (abfd, ".reg",
+ size, note->descpos + offset);
+}
- if (link_info->shared)
- {
- stub = shared_stub_entry;
- size = ARRAY_SIZE (shared_stub_entry);
- }
- else
- {
- stub = stub_entry;
- size = ARRAY_SIZE (stub_entry);
- }
+static bfd_boolean
+ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
+{
+ switch (note->descsz)
+ {
+ default:
+ return FALSE;
- i = 0;
- while (dest < contents + trampoff)
- {
- bfd_put_32 (abfd, stub[i], dest);
- i++;
- if (i == size)
- i = 0;
- dest += 4;
- }
- BFD_ASSERT (i == 0);
+ case 128: /* Linux/PPC elf_prpsinfo. */
+ elf_tdata (abfd)->core_program
+ = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
+ elf_tdata (abfd)->core_command
+ = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
}
- if (isymbuf != NULL
- && symtab_hdr->contents != (unsigned char *) isymbuf)
- {
- if (! link_info->keep_memory)
- free (isymbuf);
- else
- {
- /* Cache the symbols for elf_link_input_bfd. */
- symtab_hdr->contents = (unsigned char *) isymbuf;
- }
- }
+ /* Note that for some reason, a spurious space is tacked
+ onto the end of the args in some (at least one anyway)
+ implementations, so strip it off if it exists. */
- if (contents != NULL
- && elf_section_data (isec)->this_hdr.contents != contents)
- {
- if (!changed && !link_info->keep_memory)
- free (contents);
- else
- {
- /* Cache the section contents for elf_link_input_bfd. */
- elf_section_data (isec)->this_hdr.contents = contents;
- }
- }
+ {
+ char *command = elf_tdata (abfd)->core_command;
+ int n = strlen (command);
- if (elf_section_data (isec)->relocs != internal_relocs)
- {
- if (!changed)
- free (internal_relocs);
- else
- elf_section_data (isec)->relocs = internal_relocs;
- }
+ if (0 < n && command[n - 1] == ' ')
+ command[n - 1] = '\0';
+ }
- *again = changed;
return TRUE;
-
- error_return:
- if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
- free (isymbuf);
- if (contents != NULL
- && elf_section_data (isec)->this_hdr.contents != contents)
- free (contents);
- if (internal_relocs != NULL
- && elf_section_data (isec)->relocs != internal_relocs)
- free (internal_relocs);
- return FALSE;
}
-\f
-static reloc_howto_type *
-ppc_elf_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
- bfd_reloc_code_real_type code)
-{
- enum elf_ppc_reloc_type r;
- /* Initialize howto table if not already done. */
- if (!ppc_elf_howto_table[R_PPC_ADDR32])
- ppc_elf_howto_init ();
+/* Return address for Ith PLT stub in section PLT, for relocation REL
+ or (bfd_vma) -1 if it should not be included. */
- switch (code)
- {
- default:
- return NULL;
+static bfd_vma
+ppc_elf_plt_sym_val (bfd_vma i ATTRIBUTE_UNUSED,
+ const asection *plt ATTRIBUTE_UNUSED,
+ const arelent *rel)
+{
+ return rel->address;
+}
- case BFD_RELOC_NONE: r = R_PPC_NONE; break;
- case BFD_RELOC_32: r = R_PPC_ADDR32; break;
- case BFD_RELOC_PPC_BA26: r = R_PPC_ADDR24; break;
- case BFD_RELOC_16: r = R_PPC_ADDR16; break;
- case BFD_RELOC_LO16: r = R_PPC_ADDR16_LO; break;
- case BFD_RELOC_HI16: r = R_PPC_ADDR16_HI; break;
- case BFD_RELOC_HI16_S: r = R_PPC_ADDR16_HA; break;
- case BFD_RELOC_PPC_BA16: r = R_PPC_ADDR14; break;
- case BFD_RELOC_PPC_BA16_BRTAKEN: r = R_PPC_ADDR14_BRTAKEN; break;
- case BFD_RELOC_PPC_BA16_BRNTAKEN: r = R_PPC_ADDR14_BRNTAKEN; break;
- case BFD_RELOC_PPC_B26: r = R_PPC_REL24; break;
- case BFD_RELOC_PPC_B16: r = R_PPC_REL14; break;
- case BFD_RELOC_PPC_B16_BRTAKEN: r = R_PPC_REL14_BRTAKEN; break;
- case BFD_RELOC_PPC_B16_BRNTAKEN: r = R_PPC_REL14_BRNTAKEN; break;
- case BFD_RELOC_16_GOTOFF: r = R_PPC_GOT16; break;
- case BFD_RELOC_LO16_GOTOFF: r = R_PPC_GOT16_LO; break;
- case BFD_RELOC_HI16_GOTOFF: r = R_PPC_GOT16_HI; break;
- case BFD_RELOC_HI16_S_GOTOFF: r = R_PPC_GOT16_HA; break;
- case BFD_RELOC_24_PLT_PCREL: r = R_PPC_PLTREL24; break;
- case BFD_RELOC_PPC_COPY: r = R_PPC_COPY; break;
- case BFD_RELOC_PPC_GLOB_DAT: r = R_PPC_GLOB_DAT; break;
- case BFD_RELOC_PPC_LOCAL24PC: r = R_PPC_LOCAL24PC; break;
- case BFD_RELOC_32_PCREL: r = R_PPC_REL32; break;
- case BFD_RELOC_32_PLTOFF: r = R_PPC_PLT32; break;
- case BFD_RELOC_32_PLT_PCREL: r = R_PPC_PLTREL32; break;
- case BFD_RELOC_LO16_PLTOFF: r = R_PPC_PLT16_LO; break;
- case BFD_RELOC_HI16_PLTOFF: r = R_PPC_PLT16_HI; break;
- case BFD_RELOC_HI16_S_PLTOFF: r = R_PPC_PLT16_HA; break;
- case BFD_RELOC_GPREL16: r = R_PPC_SDAREL16; break;
- case BFD_RELOC_16_BASEREL: r = R_PPC_SECTOFF; break;
- case BFD_RELOC_LO16_BASEREL: r = R_PPC_SECTOFF_LO; break;
- case BFD_RELOC_HI16_BASEREL: r = R_PPC_SECTOFF_HI; break;
- case BFD_RELOC_HI16_S_BASEREL: r = R_PPC_SECTOFF_HA; break;
- case BFD_RELOC_CTOR: r = R_PPC_ADDR32; break;
- case BFD_RELOC_PPC_TOC16: r = R_PPC_TOC16; break;
- case BFD_RELOC_PPC_TLS: r = R_PPC_TLS; break;
- case BFD_RELOC_PPC_DTPMOD: r = R_PPC_DTPMOD32; break;
- case BFD_RELOC_PPC_TPREL16: r = R_PPC_TPREL16; break;
- case BFD_RELOC_PPC_TPREL16_LO: r = R_PPC_TPREL16_LO; break;
- case BFD_RELOC_PPC_TPREL16_HI: r = R_PPC_TPREL16_HI; break;
- case BFD_RELOC_PPC_TPREL16_HA: r = R_PPC_TPREL16_HA; break;
- case BFD_RELOC_PPC_TPREL: r = R_PPC_TPREL32; break;
- case BFD_RELOC_PPC_DTPREL16: r = R_PPC_DTPREL16; break;
- case BFD_RELOC_PPC_DTPREL16_LO: r = R_PPC_DTPREL16_LO; break;
- case BFD_RELOC_PPC_DTPREL16_HI: r = R_PPC_DTPREL16_HI; break;
- case BFD_RELOC_PPC_DTPREL16_HA: r = R_PPC_DTPREL16_HA; break;
- case BFD_RELOC_PPC_DTPREL: r = R_PPC_DTPREL32; break;
- case BFD_RELOC_PPC_GOT_TLSGD16: r = R_PPC_GOT_TLSGD16; break;
- case BFD_RELOC_PPC_GOT_TLSGD16_LO: r = R_PPC_GOT_TLSGD16_LO; break;
- case BFD_RELOC_PPC_GOT_TLSGD16_HI: r = R_PPC_GOT_TLSGD16_HI; break;
- case BFD_RELOC_PPC_GOT_TLSGD16_HA: r = R_PPC_GOT_TLSGD16_HA; break;
- case BFD_RELOC_PPC_GOT_TLSLD16: r = R_PPC_GOT_TLSLD16; break;
- case BFD_RELOC_PPC_GOT_TLSLD16_LO: r = R_PPC_GOT_TLSLD16_LO; break;
- case BFD_RELOC_PPC_GOT_TLSLD16_HI: r = R_PPC_GOT_TLSLD16_HI; break;
- case BFD_RELOC_PPC_GOT_TLSLD16_HA: r = R_PPC_GOT_TLSLD16_HA; break;
- case BFD_RELOC_PPC_GOT_TPREL16: r = R_PPC_GOT_TPREL16; break;
- case BFD_RELOC_PPC_GOT_TPREL16_LO: r = R_PPC_GOT_TPREL16_LO; break;
- case BFD_RELOC_PPC_GOT_TPREL16_HI: r = R_PPC_GOT_TPREL16_HI; break;
- case BFD_RELOC_PPC_GOT_TPREL16_HA: r = R_PPC_GOT_TPREL16_HA; break;
- case BFD_RELOC_PPC_GOT_DTPREL16: r = R_PPC_GOT_DTPREL16; break;
- case BFD_RELOC_PPC_GOT_DTPREL16_LO: r = R_PPC_GOT_DTPREL16_LO; break;
- case BFD_RELOC_PPC_GOT_DTPREL16_HI: r = R_PPC_GOT_DTPREL16_HI; break;
- case BFD_RELOC_PPC_GOT_DTPREL16_HA: r = R_PPC_GOT_DTPREL16_HA; break;
- case BFD_RELOC_PPC_EMB_NADDR32: r = R_PPC_EMB_NADDR32; break;
- case BFD_RELOC_PPC_EMB_NADDR16: r = R_PPC_EMB_NADDR16; break;
- case BFD_RELOC_PPC_EMB_NADDR16_LO: r = R_PPC_EMB_NADDR16_LO; break;
- case BFD_RELOC_PPC_EMB_NADDR16_HI: r = R_PPC_EMB_NADDR16_HI; break;
- case BFD_RELOC_PPC_EMB_NADDR16_HA: r = R_PPC_EMB_NADDR16_HA; break;
- case BFD_RELOC_PPC_EMB_SDAI16: r = R_PPC_EMB_SDAI16; break;
- case BFD_RELOC_PPC_EMB_SDA2I16: r = R_PPC_EMB_SDA2I16; break;
- case BFD_RELOC_PPC_EMB_SDA2REL: r = R_PPC_EMB_SDA2REL; break;
- case BFD_RELOC_PPC_EMB_SDA21: r = R_PPC_EMB_SDA21; break;
- case BFD_RELOC_PPC_EMB_MRKREF: r = R_PPC_EMB_MRKREF; break;
- case BFD_RELOC_PPC_EMB_RELSEC16: r = R_PPC_EMB_RELSEC16; break;
- case BFD_RELOC_PPC_EMB_RELST_LO: r = R_PPC_EMB_RELST_LO; break;
- case BFD_RELOC_PPC_EMB_RELST_HI: r = R_PPC_EMB_RELST_HI; break;
- case BFD_RELOC_PPC_EMB_RELST_HA: r = R_PPC_EMB_RELST_HA; break;
- case BFD_RELOC_PPC_EMB_BIT_FLD: r = R_PPC_EMB_BIT_FLD; break;
- case BFD_RELOC_PPC_EMB_RELSDA: r = R_PPC_EMB_RELSDA; break;
- case BFD_RELOC_VTABLE_INHERIT: r = R_PPC_GNU_VTINHERIT; break;
- case BFD_RELOC_VTABLE_ENTRY: r = R_PPC_GNU_VTENTRY; break;
- }
+/* Handle a PowerPC specific section when reading an object file. This
+ is called when bfd_section_from_shdr finds a section with an unknown
+ type. */
- return ppc_elf_howto_table[r];
-};
+static bfd_boolean
+ppc_elf_section_from_shdr (bfd *abfd,
+ Elf_Internal_Shdr *hdr,
+ const char *name,
+ int shindex)
+{
+ asection *newsect;
+ flagword flags;
-/* Set the howto pointer for a PowerPC ELF reloc. */
+ if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex))
+ return FALSE;
-static void
-ppc_elf_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
- arelent *cache_ptr,
- Elf_Internal_Rela *dst)
-{
- /* Initialize howto table if not already done. */
- if (!ppc_elf_howto_table[R_PPC_ADDR32])
- ppc_elf_howto_init ();
+ newsect = hdr->bfd_section;
+ flags = bfd_get_section_flags (abfd, newsect);
+ if (hdr->sh_flags & SHF_EXCLUDE)
+ flags |= SEC_EXCLUDE;
- BFD_ASSERT (ELF32_R_TYPE (dst->r_info) < (unsigned int) R_PPC_max);
- cache_ptr->howto = ppc_elf_howto_table[ELF32_R_TYPE (dst->r_info)];
+ if (hdr->sh_type == SHT_ORDERED)
+ flags |= SEC_SORT_ENTRIES;
+
+ bfd_set_section_flags (abfd, newsect, flags);
+ return TRUE;
}
-/* Handle the R_PPC_ADDR16_HA reloc. */
+/* Set up any other section flags and such that may be necessary. */
-static bfd_reloc_status_type
-ppc_elf_addr16_ha_reloc (bfd *abfd ATTRIBUTE_UNUSED,
- arelent *reloc_entry,
- asymbol *symbol,
- void *data ATTRIBUTE_UNUSED,
- asection *input_section,
- bfd *output_bfd,
- char **error_message ATTRIBUTE_UNUSED)
+static bfd_boolean
+ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
+ Elf_Internal_Shdr *shdr,
+ asection *asect)
{
- bfd_vma relocation;
+ if ((asect->flags & SEC_EXCLUDE) != 0)
+ shdr->sh_flags |= SHF_EXCLUDE;
- if (output_bfd != NULL)
- {
- reloc_entry->address += input_section->output_offset;
- return bfd_reloc_ok;
- }
+ if ((asect->flags & SEC_SORT_ENTRIES) != 0)
+ shdr->sh_type = SHT_ORDERED;
- if (reloc_entry->address > input_section->_cooked_size)
- return bfd_reloc_outofrange;
+ return TRUE;
+}
- if (bfd_is_com_section (symbol->section))
- relocation = 0;
- else
- relocation = symbol->value;
+/* If we have .sbss2 or .PPC.EMB.sbss0 output sections, we
+ need to bump up the number of section headers. */
- relocation += symbol->section->output_section->vma;
- relocation += symbol->section->output_offset;
- relocation += reloc_entry->addend;
+static int
+ppc_elf_additional_program_headers (bfd *abfd)
+{
+ asection *s;
+ int ret = 0;
- reloc_entry->addend += (relocation & 0x8000) << 1;
+ s = bfd_get_section_by_name (abfd, ".sbss2");
+ if (s != NULL && (s->flags & SEC_ALLOC) != 0)
+ ++ret;
- return bfd_reloc_continue;
+ s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
+ if (s != NULL && (s->flags & SEC_ALLOC) != 0)
+ ++ret;
+
+ return ret;
}
-static bfd_reloc_status_type
-ppc_elf_unhandled_reloc (bfd *abfd,
- arelent *reloc_entry,
- asymbol *symbol,
- void *data,
- asection *input_section,
- bfd *output_bfd,
- char **error_message)
-{
- /* If this is a relocatable link (output_bfd test tells us), just
- call the generic function. Any adjustment will be done at final
- link time. */
- if (output_bfd != NULL)
- return bfd_elf_generic_reloc (abfd, reloc_entry, symbol, data,
- input_section, output_bfd, error_message);
+/* Add extra PPC sections -- Note, for now, make .sbss2 and
+ .PPC.EMB.sbss0 a normal section, and not a bss section so
+ that the linker doesn't crater when trying to make more than
+ 2 sections. */
- if (error_message != NULL)
- {
- static char buf[60];
- sprintf (buf, _("generic linker can't handle %s"),
- reloc_entry->howto->name);
- *error_message = buf;
- }
- return bfd_reloc_dangerous;
+static struct bfd_elf_special_section const ppc_elf_special_sections[]=
+{
+ { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
+ { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
+ { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
+ { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
+ { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
+ { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
+ { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
+ { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
+ { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
+ { NULL, 0, 0, 0, 0 }
+};
+\f
+/* Very simple linked list structure for recording apuinfo values. */
+typedef struct apuinfo_list
+{
+ struct apuinfo_list *next;
+ unsigned long value;
}
+apuinfo_list;
-/* Fix bad default arch selected for a 32 bit input bfd when the
- default is 64 bit. */
+static apuinfo_list *head;
-static bfd_boolean
-ppc_elf_object_p (bfd *abfd)
+
+static void
+apuinfo_list_init (void)
{
- if (abfd->arch_info->the_default && abfd->arch_info->bits_per_word == 64)
- {
- Elf_Internal_Ehdr *i_ehdr = elf_elfheader (abfd);
+ head = NULL;
+}
- if (i_ehdr->e_ident[EI_CLASS] == ELFCLASS32)
- {
- /* Relies on arch after 64 bit default being 32 bit default. */
- abfd->arch_info = abfd->arch_info->next;
- BFD_ASSERT (abfd->arch_info->bits_per_word == 32);
- }
+static void
+apuinfo_list_add (unsigned long value)
+{
+ apuinfo_list *entry = head;
+
+ while (entry != NULL)
+ {
+ if (entry->value == value)
+ return;
+ entry = entry->next;
}
- return TRUE;
-}
-/* Function to set whether a module needs the -mrelocatable bit set. */
+ entry = bfd_malloc (sizeof (* entry));
+ if (entry == NULL)
+ return;
-static bfd_boolean
-ppc_elf_set_private_flags (bfd *abfd, flagword flags)
+ entry->value = value;
+ entry->next = head;
+ head = entry;
+}
+
+static unsigned
+apuinfo_list_length (void)
{
- BFD_ASSERT (!elf_flags_init (abfd)
- || elf_elfheader (abfd)->e_flags == flags);
+ apuinfo_list *entry;
+ unsigned long count;
- elf_elfheader (abfd)->e_flags = flags;
- elf_flags_init (abfd) = TRUE;
- return TRUE;
-}
+ for (entry = head, count = 0;
+ entry;
+ entry = entry->next)
+ ++ count;
-/* Merge backend specific data from an object file to the output
- object file when linking. */
+ return count;
+}
-static bfd_boolean
-ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
+static inline unsigned long
+apuinfo_list_element (unsigned long number)
{
- flagword old_flags;
- flagword new_flags;
- bfd_boolean error;
+ apuinfo_list * entry;
- /* Check if we have the same endianess. */
- if (! _bfd_generic_verify_endian_match (ibfd, obfd))
- return FALSE;
+ for (entry = head;
+ entry && number --;
+ entry = entry->next)
+ ;
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour
- || bfd_get_flavour (obfd) != bfd_target_elf_flavour)
- return TRUE;
+ return entry ? entry->value : 0;
+}
- new_flags = elf_elfheader (ibfd)->e_flags;
- old_flags = elf_elfheader (obfd)->e_flags;
- if (!elf_flags_init (obfd))
+static void
+apuinfo_list_finish (void)
+{
+ apuinfo_list *entry;
+
+ for (entry = head; entry;)
{
- /* First call, no flags set. */
- elf_flags_init (obfd) = TRUE;
- elf_elfheader (obfd)->e_flags = new_flags;
+ apuinfo_list *next = entry->next;
+ free (entry);
+ entry = next;
}
- /* Compatible flags are ok. */
- else if (new_flags == old_flags)
- ;
-
- /* Incompatible flags. */
- else
- {
- /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
- to be linked with either. */
- error = FALSE;
- if ((new_flags & EF_PPC_RELOCATABLE) != 0
- && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
- {
- error = TRUE;
- (*_bfd_error_handler)
- (_("%s: compiled with -mrelocatable and linked with "
- "modules compiled normally"),
- bfd_archive_filename (ibfd));
- }
- else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
- && (old_flags & EF_PPC_RELOCATABLE) != 0)
- {
- error = TRUE;
- (*_bfd_error_handler)
- (_("%s: compiled normally and linked with "
- "modules compiled with -mrelocatable"),
- bfd_archive_filename (ibfd));
- }
+ head = NULL;
+}
- /* The output is -mrelocatable-lib iff both the input files are. */
- if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
- elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
+#define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
+#define APUINFO_LABEL "APUinfo"
- /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
- but each input file is either -mrelocatable or -mrelocatable-lib. */
- if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
- && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
- && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
- elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
+/* Scan the input BFDs and create a linked list of
+ the APUinfo values that will need to be emitted. */
- /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
- any module uses it. */
- elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
+static void
+ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
+{
+ bfd *ibfd;
+ asection *asec;
+ char *buffer;
+ unsigned num_input_sections;
+ bfd_size_type output_section_size;
+ unsigned i;
+ unsigned num_entries;
+ unsigned long offset;
+ unsigned long length;
+ const char *error_message = NULL;
- new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
- old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
+ if (link_info == NULL)
+ return;
- /* Warn about any other mismatches. */
- if (new_flags != old_flags)
- {
- error = TRUE;
- (*_bfd_error_handler)
- (_("%s: uses different e_flags (0x%lx) fields "
- "than previous modules (0x%lx)"),
- bfd_archive_filename (ibfd), (long) new_flags, (long) old_flags);
- }
+ /* Scan the input bfds, looking for apuinfo sections. */
+ num_input_sections = 0;
+ output_section_size = 0;
- if (error)
+ for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
+ {
+ asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
+ if (asec)
{
- bfd_set_error (bfd_error_bad_value);
- return FALSE;
+ ++ num_input_sections;
+ output_section_size += asec->size;
}
}
- return TRUE;
-}
-\f
-/* Handle a PowerPC specific section when reading an object file. This
- is called when elfcode.h finds a section with an unknown type. */
+ /* We need at least one input sections
+ in order to make merging worthwhile. */
+ if (num_input_sections < 1)
+ return;
-static bfd_boolean
-ppc_elf_section_from_shdr (bfd *abfd, Elf_Internal_Shdr *hdr, const char *name)
-{
- asection *newsect;
- flagword flags;
+ /* Just make sure that the output section exists as well. */
+ asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
+ if (asec == NULL)
+ return;
- if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name))
- return FALSE;
+ /* Allocate a buffer for the contents of the input sections. */
+ buffer = bfd_malloc (output_section_size);
+ if (buffer == NULL)
+ return;
- newsect = hdr->bfd_section;
- flags = bfd_get_section_flags (abfd, newsect);
- if (hdr->sh_flags & SHF_EXCLUDE)
- flags |= SEC_EXCLUDE;
+ offset = 0;
+ apuinfo_list_init ();
- if (hdr->sh_type == SHT_ORDERED)
- flags |= SEC_SORT_ENTRIES;
+ /* Read in the input sections contents. */
+ for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
+ {
+ unsigned long datum;
+ char *ptr;
- bfd_set_section_flags (abfd, newsect, flags);
- return TRUE;
-}
-\f
-/* Set up any other section flags and such that may be necessary. */
+ asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
+ if (asec == NULL)
+ continue;
-static bfd_boolean
-ppc_elf_fake_sections (bfd *abfd ATTRIBUTE_UNUSED,
- Elf_Internal_Shdr *shdr,
- asection *asect)
-{
- if ((asect->flags & SEC_EXCLUDE) != 0)
- shdr->sh_flags |= SHF_EXCLUDE;
-
- if ((asect->flags & SEC_SORT_ENTRIES) != 0)
- shdr->sh_type = SHT_ORDERED;
-
- return TRUE;
-}
-\f
-/* Find a linker generated pointer with a given addend and type. */
-
-static elf_linker_section_pointers_t *
-elf_find_pointer_linker_section
- (elf_linker_section_pointers_t *linker_pointers,
- bfd_vma addend,
- elf_linker_section_t *lsect)
-{
- for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
- if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
- return linker_pointers;
-
- return NULL;
-}
-\f
-/* Allocate a pointer to live in a linker created section. */
-
-static bfd_boolean
-elf_create_pointer_linker_section (bfd *abfd,
- struct bfd_link_info *info,
- elf_linker_section_t *lsect,
- struct elf_link_hash_entry *h,
- const Elf_Internal_Rela *rel)
-{
- elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
- elf_linker_section_pointers_t *linker_section_ptr;
- unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
- bfd_size_type amt;
-
- BFD_ASSERT (lsect != NULL);
-
- /* Is this a global symbol? */
- if (h != NULL)
- {
- struct ppc_elf_link_hash_entry *eh;
-
- /* Has this symbol already been allocated? If so, our work is done. */
- eh = (struct ppc_elf_link_hash_entry *) h;
- if (elf_find_pointer_linker_section (eh->linker_section_pointer,
- rel->r_addend,
- lsect))
- return TRUE;
+ length = asec->size;
+ if (length < 24)
+ {
+ error_message = _("corrupt or empty %s section in %B");
+ goto fail;
+ }
- ptr_linker_section_ptr = &eh->linker_section_pointer;
- /* Make sure this symbol is output as a dynamic symbol. */
- if (h->dynindx == -1)
+ if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
+ || (bfd_bread (buffer + offset, length, ibfd) != length))
{
- if (! _bfd_elf_link_record_dynamic_symbol (info, h))
- return FALSE;
+ error_message = _("unable to read in %s section from %B");
+ goto fail;
}
- if (lsect->rel_section)
- lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
- }
- else
- {
- /* Allocation of a pointer to a local symbol. */
- elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
+ /* Process the contents of the section. */
+ ptr = buffer + offset;
+ error_message = _("corrupt %s section in %B");
- /* Allocate a table to hold the local symbols if first time. */
- if (!ptr)
- {
- unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
+ /* Verify the contents of the header. Note - we have to
+ extract the values this way in order to allow for a
+ host whose endian-ness is different from the target. */
+ datum = bfd_get_32 (ibfd, ptr);
+ if (datum != sizeof APUINFO_LABEL)
+ goto fail;
- amt = num_symbols;
- amt *= sizeof (elf_linker_section_pointers_t *);
- ptr = bfd_zalloc (abfd, amt);
+ datum = bfd_get_32 (ibfd, ptr + 8);
+ if (datum != 0x2)
+ goto fail;
- if (!ptr)
- return FALSE;
+ if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
+ goto fail;
- elf_local_ptr_offsets (abfd) = ptr;
- }
+ /* Get the number of bytes used for apuinfo entries. */
+ datum = bfd_get_32 (ibfd, ptr + 4);
+ if (datum + 20 != length)
+ goto fail;
- /* Has this symbol already been allocated? If so, our work is done. */
- if (elf_find_pointer_linker_section (ptr[r_symndx],
- rel->r_addend,
- lsect))
- return TRUE;
+ /* Make sure that we do not run off the end of the section. */
+ if (offset + length > output_section_size)
+ goto fail;
- ptr_linker_section_ptr = &ptr[r_symndx];
+ /* Scan the apuinfo section, building a list of apuinfo numbers. */
+ for (i = 0; i < datum; i += 4)
+ apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
- if (info->shared)
- {
- /* If we are generating a shared object, we need to
- output a R_<xxx>_RELATIVE reloc so that the
- dynamic linker can adjust this GOT entry. */
- BFD_ASSERT (lsect->rel_section != NULL);
- lsect->rel_section->_raw_size += sizeof (Elf32_External_Rela);
- }
+ /* Update the offset. */
+ offset += length;
}
- /* Allocate space for a pointer in the linker section, and allocate
- a new pointer record from internal memory. */
- BFD_ASSERT (ptr_linker_section_ptr != NULL);
- amt = sizeof (elf_linker_section_pointers_t);
- linker_section_ptr = bfd_alloc (abfd, amt);
+ error_message = NULL;
- if (!linker_section_ptr)
- return FALSE;
+ /* Compute the size of the output section. */
+ num_entries = apuinfo_list_length ();
+ output_section_size = 20 + num_entries * 4;
- linker_section_ptr->next = *ptr_linker_section_ptr;
- linker_section_ptr->addend = rel->r_addend;
- linker_section_ptr->lsect = lsect;
- linker_section_ptr->written_address_p = FALSE;
- *ptr_linker_section_ptr = linker_section_ptr;
+ asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
- linker_section_ptr->offset = lsect->section->_raw_size;
- lsect->section->_raw_size += 4;
+ if (! bfd_set_section_size (abfd, asec, output_section_size))
+ ibfd = abfd,
+ error_message = _("warning: unable to set size of %s section in %B");
-#ifdef DEBUG
- fprintf (stderr,
- "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
- lsect->name, (long) linker_section_ptr->offset,
- (long) lsect->section->_raw_size);
-#endif
+ fail:
+ free (buffer);
- return TRUE;
+ if (error_message)
+ (*_bfd_error_handler) (error_message, ibfd, APUINFO_SECTION_NAME);
}
-\f
-#define bfd_put_ptr(BFD, VAL, ADDR) bfd_put_32 (BFD, VAL, ADDR)
-/* Fill in the address for a pointer generated in a linker section. */
+/* Prevent the output section from accumulating the input sections'
+ contents. We have already stored this in our linked list structure. */
-static bfd_vma
-elf_finish_pointer_linker_section (bfd *output_bfd,
- bfd *input_bfd,
- struct bfd_link_info *info,
- elf_linker_section_t *lsect,
- struct elf_link_hash_entry *h,
- bfd_vma relocation,
- const Elf_Internal_Rela *rel,
- int relative_reloc)
+static bfd_boolean
+ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
+ asection *asec,
+ bfd_byte *contents ATTRIBUTE_UNUSED)
{
- elf_linker_section_pointers_t *linker_section_ptr;
-
- BFD_ASSERT (lsect != NULL);
-
- if (h != NULL)
- {
- /* Handle global symbol. */
- struct ppc_elf_link_hash_entry *eh;
-
- eh = (struct ppc_elf_link_hash_entry *) h;
- linker_section_ptr
- = elf_find_pointer_linker_section (eh->linker_section_pointer,
- rel->r_addend,
- lsect);
+ return (apuinfo_list_length ()
+ && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
+}
- BFD_ASSERT (linker_section_ptr != NULL);
+/* Finally we can generate the output section. */
- if (! elf_hash_table (info)->dynamic_sections_created
- || (info->shared
- && info->symbolic
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR)))
- {
- /* This is actually a static link, or it is a
- -Bsymbolic link and the symbol is defined
- locally. We must initialize this entry in the
- global section.
-
- When doing a dynamic link, we create a .rela.<xxx>
- relocation entry to initialize the value. This
- is done in the finish_dynamic_symbol routine. */
- if (!linker_section_ptr->written_address_p)
- {
- linker_section_ptr->written_address_p = TRUE;
- bfd_put_ptr (output_bfd,
- relocation + linker_section_ptr->addend,
- (lsect->section->contents
- + linker_section_ptr->offset));
- }
- }
- }
- else
- {
- /* Handle local symbol. */
- unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
- BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
- BFD_ASSERT (elf_local_ptr_offsets (input_bfd)[r_symndx] != NULL);
- linker_section_ptr = (elf_find_pointer_linker_section
- (elf_local_ptr_offsets (input_bfd)[r_symndx],
- rel->r_addend,
- lsect));
+static void
+ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
+{
+ bfd_byte *buffer;
+ asection *asec;
+ unsigned i;
+ unsigned num_entries;
+ bfd_size_type length;
- BFD_ASSERT (linker_section_ptr != NULL);
+ asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
+ if (asec == NULL)
+ return;
- /* Write out pointer if it hasn't been rewritten out before. */
- if (!linker_section_ptr->written_address_p)
- {
- linker_section_ptr->written_address_p = TRUE;
- bfd_put_ptr (output_bfd, relocation + linker_section_ptr->addend,
- lsect->section->contents + linker_section_ptr->offset);
+ if (apuinfo_list_length () == 0)
+ return;
- if (info->shared)
- {
- /* We need to generate a relative reloc for the dynamic
- linker. */
+ length = asec->size;
+ if (length < 20)
+ return;
- asection *srel = lsect->rel_section;
- Elf_Internal_Rela outrel[MAX_INT_RELS_PER_EXT_REL];
- bfd_byte *erel;
- const struct elf_backend_data *bed;
- unsigned int i;
+ buffer = bfd_malloc (length);
+ if (buffer == NULL)
+ {
+ (*_bfd_error_handler)
+ (_("failed to allocate space for new APUinfo section."));
+ return;
+ }
- BFD_ASSERT (srel != NULL);
+ /* Create the apuinfo header. */
+ num_entries = apuinfo_list_length ();
+ bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
+ bfd_put_32 (abfd, num_entries * 4, buffer + 4);
+ bfd_put_32 (abfd, 0x2, buffer + 8);
+ strcpy ((char *) buffer + 12, APUINFO_LABEL);
- bed = get_elf_backend_data (output_bfd);
- for (i = 0; i < bed->s->int_rels_per_ext_rel; i++)
- {
- outrel[i].r_offset = (lsect->section->output_section->vma
- + lsect->section->output_offset
- + linker_section_ptr->offset);
- outrel[i].r_info = 0;
- outrel[i].r_addend = 0;
- }
- outrel[0].r_info = ELF32_R_INFO (0, relative_reloc);
- erel = lsect->section->contents;
- erel += (elf_section_data (lsect->section)->rel_count++
- * sizeof (Elf32_External_Rela));
- bfd_elf32_swap_reloca_out (output_bfd, outrel, erel);
- }
- }
+ length = 20;
+ for (i = 0; i < num_entries; i++)
+ {
+ bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
+ length += 4;
}
- relocation = (lsect->section->output_offset
- + linker_section_ptr->offset
- - lsect->sym_offset);
+ if (length != asec->size)
+ (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
-#ifdef DEBUG
- fprintf (stderr,
- "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
- lsect->name, (long) relocation, (long) relocation);
-#endif
+ if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
+ (*_bfd_error_handler) (_("failed to install new APUinfo section."));
- /* Subtract out the addend, because it will get added back in by the normal
- processing. */
- return relocation - linker_section_ptr->addend;
+ free (buffer);
+
+ apuinfo_list_finish ();
}
\f
-/* Create a special linker section */
-static elf_linker_section_t *
-ppc_elf_create_linker_section (bfd *abfd,
- struct bfd_link_info *info,
- enum elf_linker_section_enum which)
-{
- elf_linker_section_t *lsect;
- struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
- asection *s;
- bfd_size_type amt;
- flagword flags;
- const char *name;
- const char *rel_name;
- const char *sym_name;
- bfd_vma sym_offset;
+/* The following functions are specific to the ELF linker, while
+ functions above are used generally. They appear in this file more
+ or less in the order in which they are called. eg.
+ ppc_elf_check_relocs is called early in the link process,
+ ppc_elf_finish_dynamic_sections is one of the last functions
+ called. */
- /* Both of these sections are (technically) created by the user
- putting data in them, so they shouldn't be marked
- SEC_LINKER_CREATED.
+/* The PPC linker needs to keep track of the number of relocs that it
+ decides to copy as dynamic relocs in check_relocs for each symbol.
+ This is so that it can later discard them if they are found to be
+ unnecessary. We store the information in a field extending the
+ regular ELF linker hash table. */
- The linker creates them so it has somewhere to attach their
- respective symbols. In fact, if they were empty it would
- be OK to leave the symbol set to 0 (or any random number), because
- the appropriate register should never be used. */
- flags = SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY;
- sym_offset = 32768;
+struct ppc_elf_dyn_relocs
+{
+ struct ppc_elf_dyn_relocs *next;
- switch (which)
- {
- default:
- abort ();
- return NULL;
+ /* The input section of the reloc. */
+ asection *sec;
- case LINKER_SECTION_SDATA: /* .sdata/.sbss section */
- name = ".sdata";
- rel_name = ".rela.sdata";
- sym_name = "_SDA_BASE_";
- break;
+ /* Total number of relocs copied for the input section. */
+ bfd_size_type count;
- case LINKER_SECTION_SDATA2: /* .sdata2/.sbss2 section */
- name = ".sdata2";
- rel_name = ".rela.sdata2";
- sym_name = "_SDA2_BASE_";
- flags |= SEC_READONLY;
- break;
- }
+ /* Number of pc-relative relocs copied for the input section. */
+ bfd_size_type pc_count;
+};
- /* Record the first bfd that needs the special sections. */
- if (!htab->elf.dynobj)
- htab->elf.dynobj = abfd;
+/* Of those relocs that might be copied as dynamic relocs, this macro
+ selects those that must be copied when linking a shared library,
+ even when the symbol is local. */
- amt = sizeof (elf_linker_section_t);
- lsect = bfd_zalloc (htab->elf.dynobj, amt);
+#define MUST_BE_DYN_RELOC(RTYPE) \
+ ((RTYPE) != R_PPC_REL24 \
+ && (RTYPE) != R_PPC_REL14 \
+ && (RTYPE) != R_PPC_REL14_BRTAKEN \
+ && (RTYPE) != R_PPC_REL14_BRNTAKEN \
+ && (RTYPE) != R_PPC_REL32)
- lsect->sym_offset = sym_offset;
+/* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
+ copying dynamic variables from a shared lib into an app's dynbss
+ section, and instead use a dynamic relocation to point into the
+ shared lib. */
+#define ELIMINATE_COPY_RELOCS 1
- /* See if the sections already exist. */
- s = bfd_get_section_by_name (htab->elf.dynobj, name);
- if (s == NULL || (s->flags & flags) != flags)
- {
- s = bfd_make_section_anyway (htab->elf.dynobj, name);
- if (s == NULL
- || !bfd_set_section_flags (htab->elf.dynobj, s, flags))
- return NULL;
- }
- lsect->section = s;
+/* PPC ELF linker hash entry. */
- if (bfd_get_section_alignment (htab->elf.dynobj, s) < 2
- && !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
- return NULL;
+struct ppc_elf_link_hash_entry
+{
+ struct elf_link_hash_entry elf;
- s->_raw_size = align_power (s->_raw_size, 2);
+ /* If this symbol is used in the linker created sections, the processor
+ specific backend uses this field to map the field into the offset
+ from the beginning of the section. */
+ elf_linker_section_pointers_t *linker_section_pointer;
-#ifdef DEBUG
- fprintf (stderr, "Creating section %s, current size = %ld\n",
- name, (long) s->_raw_size);
-#endif
+ /* Track dynamic relocs copied for this symbol. */
+ struct ppc_elf_dyn_relocs *dyn_relocs;
- if (sym_name)
- {
- struct elf_link_hash_entry *h;
- struct bfd_link_hash_entry *bh;
+ /* Contexts in which symbol is used in the GOT (or TOC).
+ TLS_GD .. TLS_TLS bits are or'd into the mask as the
+ corresponding relocs are encountered during check_relocs.
+ tls_optimize clears TLS_GD .. TLS_TPREL when optimizing to
+ indicate the corresponding GOT entry type is not needed. */
+#define TLS_GD 1 /* GD reloc. */
+#define TLS_LD 2 /* LD reloc. */
+#define TLS_TPREL 4 /* TPREL reloc, => IE. */
+#define TLS_DTPREL 8 /* DTPREL reloc, => LD. */
+#define TLS_TLS 16 /* Any TLS reloc. */
+#define TLS_TPRELGD 32 /* TPREL reloc resulting from GD->IE. */
+ char tls_mask;
+};
-#ifdef DEBUG
- fprintf (stderr, "Adding %s to section %s\n", sym_name, name);
-#endif
- bh = bfd_link_hash_lookup (info->hash, sym_name,
- FALSE, FALSE, FALSE);
+#define ppc_elf_hash_entry(ent) ((struct ppc_elf_link_hash_entry *) (ent))
- if ((bh == NULL || bh->type == bfd_link_hash_undefined)
- && !(_bfd_generic_link_add_one_symbol
- (info, abfd, sym_name, BSF_GLOBAL, s, sym_offset, NULL,
- FALSE, get_elf_backend_data (abfd)->collect, &bh)))
- return NULL;
- h = (struct elf_link_hash_entry *) bh;
+/* PPC ELF linker hash table. */
- h->type = STT_OBJECT;
- lsect->sym_hash = h;
+struct ppc_elf_link_hash_table
+{
+ struct elf_link_hash_table elf;
- if (info->shared
- && ! _bfd_elf_link_record_dynamic_symbol (info, h))
- return NULL;
+ /* Short-cuts to get to dynamic linker sections. */
+ asection *got;
+ asection *relgot;
+ asection *plt;
+ asection *relplt;
+ asection *dynbss;
+ asection *relbss;
+ asection *dynsbss;
+ asection *relsbss;
+ elf_linker_section_t sdata[2];
+ asection *sbss;
+
+ /* Shortcut to .__tls_get_addr. */
+ struct elf_link_hash_entry *tls_get_addr;
+
+ /* TLS local dynamic got entry handling. */
+ union {
+ bfd_signed_vma refcount;
+ bfd_vma offset;
+ } tlsld_got;
+
+ /* Small local sym to section mapping cache. */
+ struct sym_sec_cache sym_sec;
+};
+
+/* Get the PPC ELF linker hash table from a link_info structure. */
+
+#define ppc_elf_hash_table(p) \
+ ((struct ppc_elf_link_hash_table *) (p)->hash)
+
+/* Create an entry in a PPC ELF linker hash table. */
+
+static struct bfd_hash_entry *
+ppc_elf_link_hash_newfunc (struct bfd_hash_entry *entry,
+ struct bfd_hash_table *table,
+ const char *string)
+{
+ /* Allocate the structure if it has not already been allocated by a
+ subclass. */
+ if (entry == NULL)
+ {
+ entry = bfd_hash_allocate (table,
+ sizeof (struct ppc_elf_link_hash_entry));
+ if (entry == NULL)
+ return entry;
}
- if (info->shared)
+ /* Call the allocation method of the superclass. */
+ entry = _bfd_elf_link_hash_newfunc (entry, table, string);
+ if (entry != NULL)
{
- s = bfd_make_section_anyway (htab->elf.dynobj, rel_name);
- lsect->rel_section = s;
- flags = (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
- | SEC_LINKER_CREATED | SEC_READONLY);
- if (s == NULL
- || ! bfd_set_section_flags (htab->elf.dynobj, s, flags)
- || ! bfd_set_section_alignment (htab->elf.dynobj, s, 2))
- return NULL;
+ ppc_elf_hash_entry (entry)->linker_section_pointer = NULL;
+ ppc_elf_hash_entry (entry)->dyn_relocs = NULL;
+ ppc_elf_hash_entry (entry)->tls_mask = 0;
}
- return lsect;
+ return entry;
}
-\f
-/* If we have a non-zero sized .sbss2 or .PPC.EMB.sbss0 sections, we
- need to bump up the number of section headers. */
-static int
-ppc_elf_additional_program_headers (bfd *abfd)
+/* Create a PPC ELF linker hash table. */
+
+static struct bfd_link_hash_table *
+ppc_elf_link_hash_table_create (bfd *abfd)
{
- asection *s;
- int ret;
+ struct ppc_elf_link_hash_table *ret;
- ret = 0;
+ ret = bfd_zmalloc (sizeof (struct ppc_elf_link_hash_table));
+ if (ret == NULL)
+ return NULL;
- s = bfd_get_section_by_name (abfd, ".interp");
- if (s != NULL)
- ++ret;
+ if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd,
+ ppc_elf_link_hash_newfunc))
+ {
+ free (ret);
+ return NULL;
+ }
- s = bfd_get_section_by_name (abfd, ".sbss2");
- if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
- ++ret;
+ ret->sdata[0].name = ".sdata";
+ ret->sdata[0].sym_name = "_SDA_BASE_";
+ ret->sdata[0].bss_name = ".sbss";
- s = bfd_get_section_by_name (abfd, ".PPC.EMB.sbss0");
- if (s != NULL && (s->flags & SEC_LOAD) != 0 && s->_raw_size > 0)
- ++ret;
+ ret->sdata[1].name = ".sdata2";
+ ret->sdata[1].sym_name = "_SDA2_BASE_";
+ ret->sdata[1].bss_name = ".sbss2";
- return ret;
+ return &ret->elf.root;
}
-/* Modify the segment map if needed. */
-
-static bfd_boolean
-ppc_elf_modify_segment_map (bfd *abfd ATTRIBUTE_UNUSED)
-{
- return TRUE;
-}
-\f
/* The powerpc .got has a blrl instruction in it. Mark it executable. */
static bfd_boolean
htab->dynbss = bfd_get_section_by_name (abfd, ".dynbss");
htab->dynsbss = s = bfd_make_section (abfd, ".dynsbss");
if (s == NULL
- || ! bfd_set_section_flags (abfd, s, SEC_ALLOC))
+ || ! bfd_set_section_flags (abfd, s, SEC_ALLOC | SEC_LINKER_CREATED))
return FALSE;
if (! info->shared)
return bfd_set_section_flags (abfd, s, flags);
}
-/* Adjust a symbol defined by a dynamic object and referenced by a
- regular object. The current definition is in some section of the
- dynamic object, but we're not including those sections. We have to
- change the definition to something the rest of the link can
- understand. */
+/* Copy the extra info we tack onto an elf_link_hash_entry. */
-static bfd_boolean
-ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
- struct elf_link_hash_entry *h)
+static void
+ppc_elf_copy_indirect_symbol (const struct elf_backend_data *bed,
+ struct elf_link_hash_entry *dir,
+ struct elf_link_hash_entry *ind)
{
- struct ppc_elf_link_hash_table *htab;
- asection *s;
- unsigned int power_of_two;
-
-#ifdef DEBUG
- fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
- h->root.root.string);
-#endif
+ struct ppc_elf_link_hash_entry *edir, *eind;
- /* Make sure we know what is going on here. */
- htab = ppc_elf_hash_table (info);
- BFD_ASSERT (htab->elf.dynobj != NULL
- && ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT)
- || h->weakdef != NULL
- || ((h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->elf_link_hash_flags
- & ELF_LINK_HASH_REF_REGULAR) != 0
- && (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0)));
+ edir = (struct ppc_elf_link_hash_entry *) dir;
+ eind = (struct ppc_elf_link_hash_entry *) ind;
- /* Deal with function syms. */
- if (h->type == STT_FUNC
- || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
+ if (eind->dyn_relocs != NULL)
{
- /* Clear procedure linkage table information for any symbol that
- won't need a .plt entry. */
- if (h->plt.refcount <= 0
- || SYMBOL_CALLS_LOCAL (info, h)
- || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- && h->root.type == bfd_link_hash_undefweak))
+ if (edir->dyn_relocs != NULL)
{
- /* A PLT entry is not required/allowed when:
+ struct ppc_elf_dyn_relocs **pp;
+ struct ppc_elf_dyn_relocs *p;
- 1. We are not using ld.so; because then the PLT entry
- can't be set up, so we can't use one. In this case,
- ppc_elf_adjust_dynamic_symbol won't even be called.
+ if (ind->root.type == bfd_link_hash_indirect)
+ abort ();
- 2. GC has rendered the entry unused.
+ /* Add reloc counts against the weak sym to the strong sym
+ list. Merge any entries against the same section. */
+ for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
+ {
+ struct ppc_elf_dyn_relocs *q;
- 3. We know for certain that a call to this symbol
- will go to this object, or will remain undefined. */
- h->plt.offset = (bfd_vma) -1;
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
+ for (q = edir->dyn_relocs; q != NULL; q = q->next)
+ if (q->sec == p->sec)
+ {
+ q->pc_count += p->pc_count;
+ q->count += p->count;
+ *pp = p->next;
+ break;
+ }
+ if (q == NULL)
+ pp = &p->next;
+ }
+ *pp = edir->dyn_relocs;
}
- return TRUE;
+
+ edir->dyn_relocs = eind->dyn_relocs;
+ eind->dyn_relocs = NULL;
}
- else
- h->plt.offset = (bfd_vma) -1;
- /* If this is a weak symbol, and there is a real definition, the
- processor independent code will have arranged for us to see the
- real definition first, and we can just use the same value. */
- if (h->weakdef != NULL)
+ edir->tls_mask |= eind->tls_mask;
+
+ if (ELIMINATE_COPY_RELOCS
+ && ind->root.type != bfd_link_hash_indirect
+ && dir->dynamic_adjusted)
{
- BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
- || h->weakdef->root.type == bfd_link_hash_defweak);
- h->root.u.def.section = h->weakdef->root.u.def.section;
- h->root.u.def.value = h->weakdef->root.u.def.value;
- if (ELIMINATE_COPY_RELOCS)
- h->elf_link_hash_flags
- = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
- | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
- return TRUE;
+ /* If called to transfer flags for a weakdef during processing
+ of elf_adjust_dynamic_symbol, don't copy non_got_ref.
+ We clear it ourselves for ELIMINATE_COPY_RELOCS. */
+ dir->ref_dynamic |= ind->ref_dynamic;
+ dir->ref_regular |= ind->ref_regular;
+ dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
+ dir->needs_plt |= ind->needs_plt;
}
+ else
+ _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
+}
- /* This is a reference to a symbol defined by a dynamic object which
- is not a function. */
+/* Return 1 if target is one of ours. */
- /* If we are creating a shared library, we must presume that the
- only references to the symbol are via the global offset table.
- For such cases we need not do anything here; the relocations will
- be handled correctly by relocate_section. */
- if (info->shared)
- return TRUE;
+static bfd_boolean
+is_ppc_elf_target (const struct bfd_target *targ)
+{
+ extern const bfd_target bfd_elf32_powerpc_vec;
+ extern const bfd_target bfd_elf32_powerpcle_vec;
- /* If there are no references to this symbol that do not use the
- GOT, we don't need to generate a copy reloc. */
- if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
- return TRUE;
+ return targ == &bfd_elf32_powerpc_vec || targ == &bfd_elf32_powerpcle_vec;
+}
- if (ELIMINATE_COPY_RELOCS)
- {
- struct ppc_elf_dyn_relocs *p;
- for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
- {
- s = p->sec->output_section;
- if (s != NULL && (s->flags & SEC_READONLY) != 0)
- break;
- }
-
- /* If we didn't find any dynamic relocs in read-only sections, then
- we'll be keeping the dynamic relocs and avoiding the copy reloc. */
- if (p == NULL)
- {
- h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
- return TRUE;
- }
- }
+/* Hook called by the linker routine which adds symbols from an object
+ file. We use it to put .comm items in .sbss, and not .bss. */
- /* We must allocate the symbol in our .dynbss section, which will
- become part of the .bss section of the executable. There will be
- an entry for this symbol in the .dynsym section. The dynamic
- object will contain position independent code, so all references
- from the dynamic object to this symbol will go through the global
- offset table. The dynamic linker will use the .dynsym entry to
- determine the address it must put in the global offset table, so
- both the dynamic object and the regular object will refer to the
- same memory location for the variable.
+static bfd_boolean
+ppc_elf_add_symbol_hook (bfd *abfd,
+ struct bfd_link_info *info,
+ Elf_Internal_Sym *sym,
+ const char **namep ATTRIBUTE_UNUSED,
+ flagword *flagsp ATTRIBUTE_UNUSED,
+ asection **secp,
+ bfd_vma *valp)
+{
+ if (sym->st_shndx == SHN_COMMON
+ && !info->relocatable
+ && sym->st_size <= elf_gp_size (abfd)
+ && is_ppc_elf_target (info->hash->creator))
+ {
+ /* Common symbols less than or equal to -G nn bytes are automatically
+ put into .sbss. */
+ struct ppc_elf_link_hash_table *htab;
- Of course, if the symbol is sufficiently small, we must instead
- allocate it in .sbss. FIXME: It would be better to do this if and
- only if there were actually SDAREL relocs for that symbol. */
+ htab = ppc_elf_hash_table (info);
+ if (htab->sbss == NULL)
+ {
+ flagword flags = SEC_IS_COMMON | SEC_LINKER_CREATED;
- if (h->size <= elf_gp_size (htab->elf.dynobj))
- s = htab->dynsbss;
- else
- s = htab->dynbss;
- BFD_ASSERT (s != NULL);
+ if (!htab->elf.dynobj)
+ htab->elf.dynobj = abfd;
- /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
- copy the initial value out of the dynamic object and into the
- runtime process image. We need to remember the offset into the
- .rela.bss section we are going to use. */
- if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
- {
- asection *srel;
+ htab->sbss = bfd_make_section_anyway (htab->elf.dynobj, ".sbss");
+ if (htab->sbss == NULL
+ || ! bfd_set_section_flags (htab->elf.dynobj, htab->sbss, flags))
+ return FALSE;
+ }
- if (h->size <= elf_gp_size (htab->elf.dynobj))
- srel = htab->relsbss;
- else
- srel = htab->relbss;
- BFD_ASSERT (srel != NULL);
- srel->_raw_size += sizeof (Elf32_External_Rela);
- h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
+ *secp = htab->sbss;
+ *valp = sym->st_size;
}
- /* We need to figure out the alignment required for this symbol. I
- have no idea how ELF linkers handle this. */
- power_of_two = bfd_log2 (h->size);
- if (power_of_two > 4)
- power_of_two = 4;
+ return TRUE;
+}
+\f
+/* Create a special linker section. */
- /* Apply the required alignment. */
- s->_raw_size = BFD_ALIGN (s->_raw_size,
- (bfd_size_type) (1 << power_of_two));
- if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
- {
- if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
- return FALSE;
- }
+static bfd_boolean
+ppc_elf_create_linker_section (bfd *abfd,
+ struct bfd_link_info *info,
+ flagword flags,
+ elf_linker_section_t *lsect)
+{
+ struct ppc_elf_link_hash_table *htab = ppc_elf_hash_table (info);
+ asection *s;
- /* Define the symbol as being at this point in the section. */
- h->root.u.def.section = s;
- h->root.u.def.value = s->_raw_size;
+ flags |= (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS | SEC_IN_MEMORY
+ | SEC_LINKER_CREATED);
- /* Increment the section size to make room for the symbol. */
- s->_raw_size += h->size;
+ /* Record the first bfd that needs the special sections. */
+ if (!htab->elf.dynobj)
+ htab->elf.dynobj = abfd;
+
+ s = bfd_make_section_anyway (htab->elf.dynobj, lsect->name);
+ if (s == NULL
+ || !bfd_set_section_flags (htab->elf.dynobj, s, flags)
+ || !bfd_set_section_alignment (htab->elf.dynobj, s, 2))
+ return FALSE;
+ lsect->section = s;
return TRUE;
}
-\f
-/* This is the condition under which finish_dynamic_symbol will be
- called from elflink.h. If elflink.h doesn't call our
- finish_dynamic_symbol routine, we'll need to do something about
- initializing any .plt and .got entries in relocate_section. */
-#define WILL_CALL_FINISH_DYNAMIC_SYMBOL(DYN, SHARED, H) \
- ((DYN) \
- && ((SHARED) \
- || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0) \
- && ((H)->dynindx != -1 \
- || ((H)->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) != 0))
-/* Of those relocs that might be copied as dynamic relocs, this macro
- selects those that must be copied when linking a shared library,
- even when the symbol is local. */
+/* Find a linker generated pointer with a given addend and type. */
-#define MUST_BE_DYN_RELOC(RTYPE) \
- ((RTYPE) != R_PPC_REL24 \
- && (RTYPE) != R_PPC_REL14 \
- && (RTYPE) != R_PPC_REL14_BRTAKEN \
- && (RTYPE) != R_PPC_REL14_BRNTAKEN \
- && (RTYPE) != R_PPC_REL32)
+static elf_linker_section_pointers_t *
+elf_find_pointer_linker_section
+ (elf_linker_section_pointers_t *linker_pointers,
+ bfd_vma addend,
+ elf_linker_section_t *lsect)
+{
+ for ( ; linker_pointers != NULL; linker_pointers = linker_pointers->next)
+ if (lsect == linker_pointers->lsect && addend == linker_pointers->addend)
+ return linker_pointers;
-/* Allocate space in associated reloc sections for dynamic relocs. */
+ return NULL;
+}
+
+/* Allocate a pointer to live in a linker created section. */
static bfd_boolean
-allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
+elf_create_pointer_linker_section (bfd *abfd,
+ elf_linker_section_t *lsect,
+ struct elf_link_hash_entry *h,
+ const Elf_Internal_Rela *rel)
{
- struct bfd_link_info *info = inf;
- struct ppc_elf_link_hash_entry *eh;
- struct ppc_elf_link_hash_table *htab;
- struct ppc_elf_dyn_relocs *p;
-
- if (h->root.type == bfd_link_hash_indirect)
- return TRUE;
+ elf_linker_section_pointers_t **ptr_linker_section_ptr = NULL;
+ elf_linker_section_pointers_t *linker_section_ptr;
+ unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
+ bfd_size_type amt;
- if (h->root.type == bfd_link_hash_warning)
- /* When warning symbols are created, they **replace** the "real"
- entry in the hash table, thus we never get to see the real
- symbol in a hash traversal. So look at it now. */
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ BFD_ASSERT (lsect != NULL);
- htab = ppc_elf_hash_table (info);
- if (htab->elf.dynamic_sections_created
- && h->plt.refcount > 0)
+ /* Is this a global symbol? */
+ if (h != NULL)
{
- /* Make sure this symbol is output as a dynamic symbol. */
- if (h->dynindx == -1
- && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
- {
- if (! bfd_elf32_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
-
- if (info->shared
- || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
- {
- asection *s = htab->plt;
-
- /* If this is the first .plt entry, make room for the special
- first entry. */
- if (s->_raw_size == 0)
- s->_raw_size += PLT_INITIAL_ENTRY_SIZE;
-
- /* The PowerPC PLT is actually composed of two parts, the
- first part is 2 words (for a load and a jump), and then
- there is a remaining word available at the end. */
- h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
- + (PLT_SLOT_SIZE
- * ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE)
- / PLT_ENTRY_SIZE)));
-
- /* If this symbol is not defined in a regular file, and we
- are not generating a shared library, then set the symbol
- to this location in the .plt. This is required to make
- function pointers compare as equal between the normal
- executable and the shared library. */
- if (! info->shared
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- {
- h->root.u.def.section = s;
- h->root.u.def.value = h->plt.offset;
- }
+ struct ppc_elf_link_hash_entry *eh;
- /* Make room for this entry. After the 8192nd entry, room
- for two entries is allocated. */
- s->_raw_size += PLT_ENTRY_SIZE;
- if ((s->_raw_size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
- > PLT_NUM_SINGLE_ENTRIES)
- s->_raw_size += PLT_ENTRY_SIZE;
+ /* Has this symbol already been allocated? If so, our work is done. */
+ eh = (struct ppc_elf_link_hash_entry *) h;
+ if (elf_find_pointer_linker_section (eh->linker_section_pointer,
+ rel->r_addend,
+ lsect))
+ return TRUE;
- /* We also need to make an entry in the .rela.plt section. */
- htab->relplt->_raw_size += sizeof (Elf32_External_Rela);
- }
- else
- {
- h->plt.offset = (bfd_vma) -1;
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
- }
+ ptr_linker_section_ptr = &eh->linker_section_pointer;
}
else
{
- h->plt.offset = (bfd_vma) -1;
- h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
- }
+ /* Allocation of a pointer to a local symbol. */
+ elf_linker_section_pointers_t **ptr = elf_local_ptr_offsets (abfd);
- eh = (struct ppc_elf_link_hash_entry *) h;
- if (eh->elf.got.refcount > 0)
- {
- /* Make sure this symbol is output as a dynamic symbol. */
- if (eh->elf.dynindx == -1
- && (eh->elf.elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
+ /* Allocate a table to hold the local symbols if first time. */
+ if (!ptr)
{
- if (!bfd_elf32_link_record_dynamic_symbol (info, &eh->elf))
+ unsigned int num_symbols = elf_tdata (abfd)->symtab_hdr.sh_info;
+
+ amt = num_symbols;
+ amt *= sizeof (elf_linker_section_pointers_t *);
+ ptr = bfd_zalloc (abfd, amt);
+
+ if (!ptr)
return FALSE;
- }
- if (eh->tls_mask == (TLS_TLS | TLS_LD)
- && !(eh->elf.elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
- /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
- eh->elf.got.offset = (bfd_vma) -1;
- else
- {
- bfd_boolean dyn;
- eh->elf.got.offset = htab->got->_raw_size;
- if ((eh->tls_mask & TLS_TLS) != 0)
- {
- if ((eh->tls_mask & TLS_LD) != 0)
- htab->got->_raw_size += 8;
- if ((eh->tls_mask & TLS_GD) != 0)
- htab->got->_raw_size += 8;
- if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
- htab->got->_raw_size += 4;
- if ((eh->tls_mask & TLS_DTPREL) != 0)
- htab->got->_raw_size += 4;
- }
- else
- htab->got->_raw_size += 4;
- dyn = htab->elf.dynamic_sections_created;
- if ((info->shared
- || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
- && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
- || eh->elf.root.type != bfd_link_hash_undefweak))
- {
- /* All the entries we allocated need relocs. */
- htab->relgot->_raw_size
- += ((htab->got->_raw_size - eh->elf.got.offset) / 4
- * sizeof (Elf32_External_Rela));
- /* Except LD only needs one. */
- if ((eh->tls_mask & TLS_LD) != 0)
- htab->relgot->_raw_size -= sizeof (Elf32_External_Rela);
- }
+ elf_local_ptr_offsets (abfd) = ptr;
}
- }
- else
- eh->elf.got.offset = (bfd_vma) -1;
- if (eh->dyn_relocs == NULL)
- return TRUE;
+ /* Has this symbol already been allocated? If so, our work is done. */
+ if (elf_find_pointer_linker_section (ptr[r_symndx],
+ rel->r_addend,
+ lsect))
+ return TRUE;
- /* In the shared -Bsymbolic case, discard space allocated for
- dynamic pc-relative relocs against symbols which turn out to be
- defined in regular objects. For the normal shared case, discard
- space for relocs that have become local due to symbol visibility
- changes. */
+ ptr_linker_section_ptr = &ptr[r_symndx];
+ }
- if (info->shared)
- {
- /* Relocs that use pc_count are those that appear on a call insn,
- or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
- generated via assembly. We want calls to protected symbols to
- resolve directly to the function rather than going via the plt.
- If people want function pointer comparisons to work as expected
- then they should avoid writing weird assembly. */
- if (SYMBOL_CALLS_LOCAL (info, h))
- {
- struct ppc_elf_dyn_relocs **pp;
-
- for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
- {
- p->count -= p->pc_count;
- p->pc_count = 0;
- if (p->count == 0)
- *pp = p->next;
- else
- pp = &p->next;
- }
- }
-
- /* Also discard relocs on undefined weak syms with non-default
- visibility. */
- if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
- && h->root.type == bfd_link_hash_undefweak)
- eh->dyn_relocs = NULL;
- }
- else if (ELIMINATE_COPY_RELOCS)
- {
- /* For the non-shared case, discard space for relocs against
- symbols which turn out to need copy relocs or are not
- dynamic. */
-
- if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
- {
- /* Make sure this symbol is output as a dynamic symbol.
- Undefined weak syms won't yet be marked as dynamic. */
- if (h->dynindx == -1
- && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
- {
- if (! bfd_elf64_link_record_dynamic_symbol (info, h))
- return FALSE;
- }
+ /* Allocate space for a pointer in the linker section, and allocate
+ a new pointer record from internal memory. */
+ BFD_ASSERT (ptr_linker_section_ptr != NULL);
+ amt = sizeof (elf_linker_section_pointers_t);
+ linker_section_ptr = bfd_alloc (abfd, amt);
- /* If that succeeded, we know we'll be keeping all the
- relocs. */
- if (h->dynindx != -1)
- goto keep;
- }
+ if (!linker_section_ptr)
+ return FALSE;
- eh->dyn_relocs = NULL;
+ linker_section_ptr->next = *ptr_linker_section_ptr;
+ linker_section_ptr->addend = rel->r_addend;
+ linker_section_ptr->lsect = lsect;
+ *ptr_linker_section_ptr = linker_section_ptr;
- keep: ;
- }
+ linker_section_ptr->offset = lsect->section->size;
+ lsect->section->size += 4;
- /* Finally, allocate space. */
- for (p = eh->dyn_relocs; p != NULL; p = p->next)
- {
- asection *sreloc = elf_section_data (p->sec)->sreloc;
- sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
- }
+#ifdef DEBUG
+ fprintf (stderr,
+ "Create pointer in linker section %s, offset = %ld, section size = %ld\n",
+ lsect->name, (long) linker_section_ptr->offset,
+ (long) lsect->section->size);
+#endif
return TRUE;
}
-/* Find any dynamic relocs that apply to read-only sections. */
-
static bfd_boolean
-readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
+update_local_sym_info (bfd *abfd,
+ Elf_Internal_Shdr *symtab_hdr,
+ unsigned long r_symndx,
+ int tls_type)
{
- struct ppc_elf_dyn_relocs *p;
-
- if (h->root.type == bfd_link_hash_indirect)
- return TRUE;
-
- if (h->root.type == bfd_link_hash_warning)
- h = (struct elf_link_hash_entry *) h->root.u.i.link;
+ bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
+ char *local_got_tls_masks;
- for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
+ if (local_got_refcounts == NULL)
{
- asection *s = p->sec->output_section;
-
- if (s != NULL
- && ((s->flags & (SEC_READONLY | SEC_ALLOC))
- == (SEC_READONLY | SEC_ALLOC)))
- {
- ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
+ bfd_size_type size = symtab_hdr->sh_info;
- /* Not an error, just cut short the traversal. */
- return FALSE;
- }
+ size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
+ local_got_refcounts = bfd_zalloc (abfd, size);
+ if (local_got_refcounts == NULL)
+ return FALSE;
+ elf_local_got_refcounts (abfd) = local_got_refcounts;
}
+
+ local_got_refcounts[r_symndx] += 1;
+ local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
+ local_got_tls_masks[r_symndx] |= tls_type;
return TRUE;
}
-/* Set the sizes of the dynamic sections. */
+static void
+bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
+{
+ (*_bfd_error_handler)
+ (_("%B: relocation %s cannot be used when making a shared object"),
+ abfd,
+ ppc_elf_howto_table[r_type]->name);
+ bfd_set_error (bfd_error_bad_value);
+}
+
+/* Look through the relocs for a section during the first phase, and
+ allocate space in the global offset table or procedure linkage
+ table. */
static bfd_boolean
-ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
- struct bfd_link_info *info)
+ppc_elf_check_relocs (bfd *abfd,
+ struct bfd_link_info *info,
+ asection *sec,
+ const Elf_Internal_Rela *relocs)
{
struct ppc_elf_link_hash_table *htab;
- asection *s;
- bfd_boolean relocs;
- bfd *ibfd;
+ Elf_Internal_Shdr *symtab_hdr;
+ struct elf_link_hash_entry **sym_hashes;
+ const Elf_Internal_Rela *rel;
+ const Elf_Internal_Rela *rel_end;
+ asection *sreloc;
+
+ if (info->relocatable)
+ return TRUE;
#ifdef DEBUG
- fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
+ _bfd_error_handler ("ppc_elf_check_relocs called for section %A in %B",
+ sec, abfd);
#endif
- htab = ppc_elf_hash_table (info);
- BFD_ASSERT (htab->elf.dynobj != NULL);
-
- if (elf_hash_table (info)->dynamic_sections_created)
- {
- /* Set the contents of the .interp section to the interpreter. */
- if (info->executable)
- {
- s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
- BFD_ASSERT (s != NULL);
- s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
- s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
- }
- }
+ /* Initialize howto table if not already done. */
+ if (!ppc_elf_howto_table[R_PPC_ADDR32])
+ ppc_elf_howto_init ();
- if (htab->tlsld_got.refcount > 0)
- {
- htab->tlsld_got.offset = htab->got->_raw_size;
- htab->got->_raw_size += 8;
- if (info->shared)
- htab->relgot->_raw_size += sizeof (Elf32_External_Rela);
- }
- else
- htab->tlsld_got.offset = (bfd_vma) -1;
+ htab = ppc_elf_hash_table (info);
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+ sym_hashes = elf_sym_hashes (abfd);
+ sreloc = NULL;
- /* Set up .got offsets for local syms, and space for local dynamic
- relocs. */
- for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ rel_end = relocs + sec->reloc_count;
+ for (rel = relocs; rel < rel_end; rel++)
{
- bfd_signed_vma *local_got;
- bfd_signed_vma *end_local_got;
- char *lgot_masks;
- bfd_size_type locsymcount;
- Elf_Internal_Shdr *symtab_hdr;
- asection *srel;
+ unsigned long r_symndx;
+ enum elf_ppc_reloc_type r_type;
+ struct elf_link_hash_entry *h;
+ int tls_type = 0;
- if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
- continue;
+ r_symndx = ELF32_R_SYM (rel->r_info);
+ if (r_symndx < symtab_hdr->sh_info)
+ h = NULL;
+ else
+ h = sym_hashes[r_symndx - symtab_hdr->sh_info];
- for (s = ibfd->sections; s != NULL; s = s->next)
+ /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
+ This shows up in particular in an R_PPC_ADDR32 in the eabi
+ startup code. */
+ if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
{
- struct ppc_elf_dyn_relocs *p;
-
- for (p = ((struct ppc_elf_dyn_relocs *)
- elf_section_data (s)->local_dynrel);
- p != NULL;
- p = p->next)
+ if (htab->got == NULL)
{
- if (!bfd_is_abs_section (p->sec)
- && bfd_is_abs_section (p->sec->output_section))
- {
- /* Input section has been discarded, either because
- it is a copy of a linkonce section or due to
- linker script /DISCARD/, so we'll be discarding
- the relocs too. */
- }
- else if (p->count != 0)
- {
- elf_section_data (p->sec)->sreloc->_raw_size
- += p->count * sizeof (Elf32_External_Rela);
- if ((p->sec->output_section->flags
- & (SEC_READONLY | SEC_ALLOC))
- == (SEC_READONLY | SEC_ALLOC))
- info->flags |= DF_TEXTREL;
- }
+ if (htab->elf.dynobj == NULL)
+ htab->elf.dynobj = abfd;
+ if (!ppc_elf_create_got (htab->elf.dynobj, info))
+ return FALSE;
}
}
- local_got = elf_local_got_refcounts (ibfd);
- if (!local_got)
- continue;
-
- symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
- locsymcount = symtab_hdr->sh_info;
- end_local_got = local_got + locsymcount;
- lgot_masks = (char *) end_local_got;
- s = htab->got;
- srel = htab->relgot;
- for (; local_got < end_local_got; ++local_got, ++lgot_masks)
- if (*local_got > 0)
- {
- if (*lgot_masks == (TLS_TLS | TLS_LD))
- {
- /* If just an LD reloc, we'll just use
- htab->tlsld_got.offset. */
- if (htab->tlsld_got.offset == (bfd_vma) -1)
- {
- htab->tlsld_got.offset = s->_raw_size;
- s->_raw_size += 8;
- if (info->shared)
- srel->_raw_size += sizeof (Elf32_External_Rela);
- }
- *local_got = (bfd_vma) -1;
- }
- else
- {
- *local_got = s->_raw_size;
- if ((*lgot_masks & TLS_TLS) != 0)
- {
- if ((*lgot_masks & TLS_GD) != 0)
- s->_raw_size += 8;
- if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
- s->_raw_size += 4;
- if ((*lgot_masks & TLS_DTPREL) != 0)
- s->_raw_size += 4;
- }
- else
- s->_raw_size += 4;
- if (info->shared)
- srel->_raw_size += ((s->_raw_size - *local_got) / 4
- * sizeof (Elf32_External_Rela));
- }
- }
- else
- *local_got = (bfd_vma) -1;
- }
-
- /* Allocate space for global sym dynamic relocs. */
- elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
-
- /* We've now determined the sizes of the various dynamic sections.
- Allocate memory for them. */
- relocs = FALSE;
- for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
- {
- if ((s->flags & SEC_LINKER_CREATED) == 0)
- continue;
-
- if (s == htab->plt
- || s == htab->got
- || (htab->sdata != NULL && s == htab->sdata->section)
- || (htab->sdata2 != NULL && s == htab->sdata2->section))
- {
- /* Strip this section if we don't need it; see the
- comment below. */
- }
- else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
- {
- if (s->_raw_size == 0)
- {
- /* If we don't need this section, strip it from the
- output file. This is mostly to handle .rela.bss and
- .rela.plt. We must create both sections in
- create_dynamic_sections, because they must be created
- before the linker maps input sections to output
- sections. The linker does that before
- adjust_dynamic_symbol is called, and it is that
- function which decides whether anything needs to go
- into these sections. */
- }
- else
- {
- /* Remember whether there are any relocation sections. */
- relocs = TRUE;
-
- /* We use the reloc_count field as a counter if we need
- to copy relocs into the output file. */
- s->reloc_count = 0;
- }
- }
- else
- {
- /* It's not one of our sections, so don't allocate space. */
- continue;
- }
-
- if (s->_raw_size == 0)
- {
- _bfd_strip_section_from_output (info, s);
- continue;
- }
-
- /* Allocate memory for the section contents. */
- s->contents = bfd_zalloc (htab->elf.dynobj, s->_raw_size);
- if (s->contents == NULL)
- return FALSE;
- }
-
- if (htab->elf.dynamic_sections_created)
- {
- /* Add some entries to the .dynamic section. We fill in the
- values later, in ppc_elf_finish_dynamic_sections, but we
- must add the entries now so that we get the correct size for
- the .dynamic section. The DT_DEBUG entry is filled in by the
- dynamic linker and used by the debugger. */
-#define add_dynamic_entry(TAG, VAL) \
- bfd_elf32_add_dynamic_entry (info, (TAG), (VAL))
-
- if (info->executable)
- {
- if (!add_dynamic_entry (DT_DEBUG, 0))
- return FALSE;
- }
-
- if (htab->plt != NULL && htab->plt->_raw_size != 0)
- {
- if (!add_dynamic_entry (DT_PLTGOT, 0)
- || !add_dynamic_entry (DT_PLTRELSZ, 0)
- || !add_dynamic_entry (DT_PLTREL, DT_RELA)
- || !add_dynamic_entry (DT_JMPREL, 0))
- return FALSE;
- }
-
- if (relocs)
- {
- if (!add_dynamic_entry (DT_RELA, 0)
- || !add_dynamic_entry (DT_RELASZ, 0)
- || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
- return FALSE;
- }
-
- /* If any dynamic relocs apply to a read-only section, then we
- need a DT_TEXTREL entry. */
- if ((info->flags & DF_TEXTREL) == 0)
- elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
- info);
-
- if ((info->flags & DF_TEXTREL) != 0)
- {
- if (!add_dynamic_entry (DT_TEXTREL, 0))
- return FALSE;
- }
- }
-#undef add_dynamic_entry
-
- return TRUE;
-}
-\f
-static bfd_boolean
-update_local_sym_info (bfd *abfd,
- Elf_Internal_Shdr *symtab_hdr,
- unsigned long r_symndx,
- int tls_type)
-{
- bfd_signed_vma *local_got_refcounts = elf_local_got_refcounts (abfd);
- char *local_got_tls_masks;
-
- if (local_got_refcounts == NULL)
- {
- bfd_size_type size = symtab_hdr->sh_info;
-
- size *= sizeof (*local_got_refcounts) + sizeof (*local_got_tls_masks);
- local_got_refcounts = bfd_zalloc (abfd, size);
- if (local_got_refcounts == NULL)
- return FALSE;
- elf_local_got_refcounts (abfd) = local_got_refcounts;
- }
-
- local_got_refcounts[r_symndx] += 1;
- local_got_tls_masks = (char *) (local_got_refcounts + symtab_hdr->sh_info);
- local_got_tls_masks[r_symndx] |= tls_type;
- return TRUE;
-}
-
-static void
-bad_shared_reloc (bfd *abfd, enum elf_ppc_reloc_type r_type)
-{
- (*_bfd_error_handler)
- (_("%s: relocation %s cannot be used when making a shared object"),
- bfd_archive_filename (abfd),
- ppc_elf_howto_table[r_type]->name);
- bfd_set_error (bfd_error_bad_value);
-}
-
-/* Look through the relocs for a section during the first phase, and
- allocate space in the global offset table or procedure linkage
- table. */
-
-static bfd_boolean
-ppc_elf_check_relocs (bfd *abfd,
- struct bfd_link_info *info,
- asection *sec,
- const Elf_Internal_Rela *relocs)
-{
- struct ppc_elf_link_hash_table *htab;
- Elf_Internal_Shdr *symtab_hdr;
- struct elf_link_hash_entry **sym_hashes;
- const Elf_Internal_Rela *rel;
- const Elf_Internal_Rela *rel_end;
- asection *sreloc;
-
- if (info->relocatable)
- return TRUE;
-
-#ifdef DEBUG
- fprintf (stderr, "ppc_elf_check_relocs called for section %s in %s\n",
- bfd_get_section_name (abfd, sec),
- bfd_archive_filename (abfd));
-#endif
-
- /* Initialize howto table if not already done. */
- if (!ppc_elf_howto_table[R_PPC_ADDR32])
- ppc_elf_howto_init ();
-
- /* Create the linker generated sections all the time so that the
- special symbols are created. */
- htab = ppc_elf_hash_table (info);
- if (htab->sdata == NULL)
- {
- htab->sdata = ppc_elf_create_linker_section (abfd, info,
- LINKER_SECTION_SDATA);
- if (htab->sdata == NULL)
- return FALSE;
- }
-
- if (htab->sdata2 == NULL)
- {
- htab->sdata2 = ppc_elf_create_linker_section (abfd, info,
- LINKER_SECTION_SDATA2);
- if (htab->sdata2 == NULL)
- return FALSE;
- }
-
- symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
- sym_hashes = elf_sym_hashes (abfd);
- sreloc = NULL;
-
- rel_end = relocs + sec->reloc_count;
- for (rel = relocs; rel < rel_end; rel++)
- {
- unsigned long r_symndx;
- enum elf_ppc_reloc_type r_type;
- struct elf_link_hash_entry *h;
- int tls_type = 0;
-
- r_symndx = ELF32_R_SYM (rel->r_info);
- if (r_symndx < symtab_hdr->sh_info)
- h = NULL;
- else
- h = sym_hashes[r_symndx - symtab_hdr->sh_info];
-
- /* If a relocation refers to _GLOBAL_OFFSET_TABLE_, create the .got.
- This shows up in particular in an R_PPC_ADDR32 in the eabi
- startup code. */
- if (h && strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0)
- {
- if (htab->got == NULL)
- {
- if (htab->elf.dynobj == NULL)
- htab->elf.dynobj = abfd;
- if (!ppc_elf_create_got (htab->elf.dynobj, info))
- return FALSE;
- }
- }
-
- r_type = ELF32_R_TYPE (rel->r_info);
- switch (r_type)
- {
- case R_PPC_GOT_TLSLD16:
- case R_PPC_GOT_TLSLD16_LO:
- case R_PPC_GOT_TLSLD16_HI:
- case R_PPC_GOT_TLSLD16_HA:
- htab->tlsld_got.refcount += 1;
- tls_type = TLS_TLS | TLS_LD;
- goto dogottls;
+ r_type = ELF32_R_TYPE (rel->r_info);
+ switch (r_type)
+ {
+ case R_PPC_GOT_TLSLD16:
+ case R_PPC_GOT_TLSLD16_LO:
+ case R_PPC_GOT_TLSLD16_HI:
+ case R_PPC_GOT_TLSLD16_HA:
+ htab->tlsld_got.refcount += 1;
+ tls_type = TLS_TLS | TLS_LD;
+ goto dogottls;
case R_PPC_GOT_TLSGD16:
case R_PPC_GOT_TLSGD16_LO:
bad_shared_reloc (abfd, r_type);
return FALSE;
}
- if (!elf_create_pointer_linker_section (abfd, info,
- htab->sdata, h, rel))
+ if (htab->sdata[0].section == NULL
+ && !ppc_elf_create_linker_section (abfd, info, 0,
+ &htab->sdata[0]))
+ return FALSE;
+ if (!elf_create_pointer_linker_section (abfd, &htab->sdata[0],
+ h, rel))
return FALSE;
break;
bad_shared_reloc (abfd, r_type);
return FALSE;
}
- if (!elf_create_pointer_linker_section (abfd, info,
- htab->sdata2, h, rel))
+ if (htab->sdata[1].section == NULL
+ && !ppc_elf_create_linker_section (abfd, info, SEC_READONLY,
+ &htab->sdata[1]))
+ return FALSE;
+ if (!elf_create_pointer_linker_section (abfd, &htab->sdata[1],
+ h, rel))
return FALSE;
break;
{
/* It does not make sense to have a procedure linkage
table entry for a local symbol. */
- (*_bfd_error_handler) (_("%s(%s+0x%lx): %s reloc against "
+ (*_bfd_error_handler) (_("%B(%A+0x%lx): %s reloc against "
"local symbol"),
- bfd_archive_filename (abfd),
- sec->name,
+ abfd,
+ sec,
(long) rel->r_offset,
ppc_elf_howto_table[r_type]->name);
bfd_set_error (bfd_error_bad_value);
return FALSE;
}
- h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
+ h->needs_plt = 1;
h->plt.refcount++;
break;
/* This relocation describes the C++ object vtable hierarchy.
Reconstruct it for later use during GC. */
case R_PPC_GNU_VTINHERIT:
- if (!_bfd_elf32_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
+ if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
return FALSE;
break;
/* This relocation describes which C++ vtable entries are actually
used. Record for later use during GC. */
case R_PPC_GNU_VTENTRY:
- if (!_bfd_elf32_gc_record_vtentry (abfd, sec, h, rel->r_addend))
+ if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
return FALSE;
break;
h->plt.refcount++;
/* We may need a copy reloc too. */
- h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
+ h->non_got_ref = 1;
}
dodyn:
|| (h != NULL
&& (! info->symbolic
|| h->root.type == bfd_link_hash_defweak
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0))))
+ || !h->def_regular))))
|| (ELIMINATE_COPY_RELOCS
&& !info->shared
&& (sec->flags & SEC_ALLOC) != 0
&& h != NULL
&& (h->root.type == bfd_link_hash_defweak
- || (h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_REGULAR) == 0)))
+ || !h->def_regular)))
{
struct ppc_elf_dyn_relocs *p;
struct ppc_elf_dyn_relocs **head;
&& strcmp (bfd_get_section_name (abfd, sec),
name + 5) == 0);
+ if (htab->elf.dynobj == NULL)
+ htab->elf.dynobj = abfd;
sreloc = bfd_get_section_by_name (htab->elf.dynobj, name);
if (sreloc == NULL)
{
return TRUE;
}
+\f
+/* Merge backend specific data from an object file to the output
+ object file when linking. */
-/* Return the section that should be marked against GC for a given
- relocation. */
-
-static asection *
-ppc_elf_gc_mark_hook (asection *sec,
- struct bfd_link_info *info ATTRIBUTE_UNUSED,
- Elf_Internal_Rela *rel,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym)
+static bfd_boolean
+ppc_elf_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
{
- if (h != NULL)
- {
- switch (ELF32_R_TYPE (rel->r_info))
- {
- case R_PPC_GNU_VTINHERIT:
- case R_PPC_GNU_VTENTRY:
- break;
+ flagword old_flags;
+ flagword new_flags;
+ bfd_boolean error;
- default:
- switch (h->root.type)
- {
+ if (!is_ppc_elf_target (ibfd->xvec)
+ || !is_ppc_elf_target (obfd->xvec))
+ return TRUE;
+
+ /* Check if we have the same endianess. */
+ if (! _bfd_generic_verify_endian_match (ibfd, obfd))
+ return FALSE;
+
+ new_flags = elf_elfheader (ibfd)->e_flags;
+ old_flags = elf_elfheader (obfd)->e_flags;
+ if (!elf_flags_init (obfd))
+ {
+ /* First call, no flags set. */
+ elf_flags_init (obfd) = TRUE;
+ elf_elfheader (obfd)->e_flags = new_flags;
+ }
+
+ /* Compatible flags are ok. */
+ else if (new_flags == old_flags)
+ ;
+
+ /* Incompatible flags. */
+ else
+ {
+ /* Warn about -mrelocatable mismatch. Allow -mrelocatable-lib
+ to be linked with either. */
+ error = FALSE;
+ if ((new_flags & EF_PPC_RELOCATABLE) != 0
+ && (old_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0)
+ {
+ error = TRUE;
+ (*_bfd_error_handler)
+ (_("%B: compiled with -mrelocatable and linked with "
+ "modules compiled normally"), ibfd);
+ }
+ else if ((new_flags & (EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB)) == 0
+ && (old_flags & EF_PPC_RELOCATABLE) != 0)
+ {
+ error = TRUE;
+ (*_bfd_error_handler)
+ (_("%B: compiled normally and linked with "
+ "modules compiled with -mrelocatable"), ibfd);
+ }
+
+ /* The output is -mrelocatable-lib iff both the input files are. */
+ if (! (new_flags & EF_PPC_RELOCATABLE_LIB))
+ elf_elfheader (obfd)->e_flags &= ~EF_PPC_RELOCATABLE_LIB;
+
+ /* The output is -mrelocatable iff it can't be -mrelocatable-lib,
+ but each input file is either -mrelocatable or -mrelocatable-lib. */
+ if (! (elf_elfheader (obfd)->e_flags & EF_PPC_RELOCATABLE_LIB)
+ && (new_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE))
+ && (old_flags & (EF_PPC_RELOCATABLE_LIB | EF_PPC_RELOCATABLE)))
+ elf_elfheader (obfd)->e_flags |= EF_PPC_RELOCATABLE;
+
+ /* Do not warn about eabi vs. V.4 mismatch, just or in the bit if
+ any module uses it. */
+ elf_elfheader (obfd)->e_flags |= (new_flags & EF_PPC_EMB);
+
+ new_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
+ old_flags &= ~(EF_PPC_RELOCATABLE | EF_PPC_RELOCATABLE_LIB | EF_PPC_EMB);
+
+ /* Warn about any other mismatches. */
+ if (new_flags != old_flags)
+ {
+ error = TRUE;
+ (*_bfd_error_handler)
+ (_("%B: uses different e_flags (0x%lx) fields "
+ "than previous modules (0x%lx)"),
+ ibfd, (long) new_flags, (long) old_flags);
+ }
+
+ if (error)
+ {
+ bfd_set_error (bfd_error_bad_value);
+ return FALSE;
+ }
+ }
+
+ return TRUE;
+}
+\f
+/* Return the section that should be marked against GC for a given
+ relocation. */
+
+static asection *
+ppc_elf_gc_mark_hook (asection *sec,
+ struct bfd_link_info *info ATTRIBUTE_UNUSED,
+ Elf_Internal_Rela *rel,
+ struct elf_link_hash_entry *h,
+ Elf_Internal_Sym *sym)
+{
+ if (h != NULL)
+ {
+ switch (ELF32_R_TYPE (rel->r_info))
+ {
+ case R_PPC_GNU_VTINHERIT:
+ case R_PPC_GNU_VTENTRY:
+ break;
+
+ default:
+ switch (h->root.type)
+ {
case bfd_link_hash_defined:
case bfd_link_hash_defweak:
return h->root.u.def.section;
struct ppc_elf_link_hash_entry *eh;
h = sym_hashes[r_symndx - symtab_hdr->sh_info];
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
eh = (struct ppc_elf_link_hash_entry *) h;
for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
}
return TRUE;
}
-
+\f
/* Set htab->tls_get_addr and call the generic ELF tls_setup function. */
asection *
is_local = FALSE;
if (h == NULL
- || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC))
+ || !h->def_dynamic)
is_local = TRUE;
r_type = ELF32_R_TYPE (rel->r_info);
return TRUE;
}
\f
-/* Hook called by the linker routine which adds symbols from an object
- file. We use it to put .comm items in .sbss, and not .bss. */
+/* Adjust a symbol defined by a dynamic object and referenced by a
+ regular object. The current definition is in some section of the
+ dynamic object, but we're not including those sections. We have to
+ change the definition to something the rest of the link can
+ understand. */
static bfd_boolean
-ppc_elf_add_symbol_hook (bfd *abfd,
- struct bfd_link_info *info,
- const Elf_Internal_Sym *sym,
- const char **namep ATTRIBUTE_UNUSED,
- flagword *flagsp ATTRIBUTE_UNUSED,
- asection **secp,
- bfd_vma *valp)
+ppc_elf_adjust_dynamic_symbol (struct bfd_link_info *info,
+ struct elf_link_hash_entry *h)
{
- if (sym->st_shndx == SHN_COMMON
- && !info->relocatable
- && sym->st_size <= elf_gp_size (abfd)
- && (info->hash->creator == abfd->xvec
- || info->hash->creator == abfd->xvec->alternative_target))
- {
- /* Common symbols less than or equal to -G nn bytes are automatically
- put into .sbss. */
- struct ppc_elf_link_hash_table *htab;
+ struct ppc_elf_link_hash_table *htab;
+ asection *s;
+ unsigned int power_of_two;
- htab = ppc_elf_hash_table (info);
- if (htab->sbss == NULL)
+#ifdef DEBUG
+ fprintf (stderr, "ppc_elf_adjust_dynamic_symbol called for %s\n",
+ h->root.root.string);
+#endif
+
+ /* Make sure we know what is going on here. */
+ htab = ppc_elf_hash_table (info);
+ BFD_ASSERT (htab->elf.dynobj != NULL
+ && (h->needs_plt
+ || h->u.weakdef != NULL
+ || (h->def_dynamic
+ && h->ref_regular
+ && !h->def_regular)));
+
+ /* Deal with function syms. */
+ if (h->type == STT_FUNC
+ || h->needs_plt)
+ {
+ /* Clear procedure linkage table information for any symbol that
+ won't need a .plt entry. */
+ if (h->plt.refcount <= 0
+ || SYMBOL_CALLS_LOCAL (info, h)
+ || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+ && h->root.type == bfd_link_hash_undefweak))
{
- flagword flags = SEC_IS_COMMON;
+ /* A PLT entry is not required/allowed when:
- htab->sbss = bfd_make_section_anyway (abfd, ".sbss");
- if (htab->sbss == NULL
- || ! bfd_set_section_flags (abfd, htab->sbss, flags))
- return FALSE;
- }
+ 1. We are not using ld.so; because then the PLT entry
+ can't be set up, so we can't use one. In this case,
+ ppc_elf_adjust_dynamic_symbol won't even be called.
- *secp = htab->sbss;
- *valp = sym->st_size;
+ 2. GC has rendered the entry unused.
+
+ 3. We know for certain that a call to this symbol
+ will go to this object, or will remain undefined. */
+ h->plt.offset = (bfd_vma) -1;
+ h->needs_plt = 0;
+ }
+ return TRUE;
}
+ else
+ h->plt.offset = (bfd_vma) -1;
- return TRUE;
-}
-\f
-/* Finish up dynamic symbol handling. We set the contents of various
- dynamic sections here. */
+ /* If this is a weak symbol, and there is a real definition, the
+ processor independent code will have arranged for us to see the
+ real definition first, and we can just use the same value. */
+ if (h->u.weakdef != NULL)
+ {
+ BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
+ || h->u.weakdef->root.type == bfd_link_hash_defweak);
+ h->root.u.def.section = h->u.weakdef->root.u.def.section;
+ h->root.u.def.value = h->u.weakdef->root.u.def.value;
+ if (ELIMINATE_COPY_RELOCS)
+ h->non_got_ref = h->u.weakdef->non_got_ref;
+ return TRUE;
+ }
-static bfd_boolean
-ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
- struct bfd_link_info *info,
- struct elf_link_hash_entry *h,
- Elf_Internal_Sym *sym)
-{
- struct ppc_elf_link_hash_table *htab;
+ /* This is a reference to a symbol defined by a dynamic object which
+ is not a function. */
-#ifdef DEBUG
- fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
- h->root.root.string);
-#endif
+ /* If we are creating a shared library, we must presume that the
+ only references to the symbol are via the global offset table.
+ For such cases we need not do anything here; the relocations will
+ be handled correctly by relocate_section. */
+ if (info->shared)
+ return TRUE;
- htab = ppc_elf_hash_table (info);
- BFD_ASSERT (htab->elf.dynobj != NULL);
+ /* If there are no references to this symbol that do not use the
+ GOT, we don't need to generate a copy reloc. */
+ if (!h->non_got_ref)
+ return TRUE;
- if (h->plt.offset != (bfd_vma) -1)
+ if (ELIMINATE_COPY_RELOCS)
{
- Elf_Internal_Rela rela;
- bfd_byte *loc;
- bfd_vma reloc_index;
+ struct ppc_elf_dyn_relocs *p;
+ for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
+ {
+ s = p->sec->output_section;
+ if (s != NULL && (s->flags & SEC_READONLY) != 0)
+ break;
+ }
-#ifdef DEBUG
- fprintf (stderr, ", plt_offset = %d", h->plt.offset);
-#endif
+ /* If we didn't find any dynamic relocs in read-only sections, then
+ we'll be keeping the dynamic relocs and avoiding the copy reloc. */
+ if (p == NULL)
+ {
+ h->non_got_ref = 0;
+ return TRUE;
+ }
+ }
- /* This symbol has an entry in the procedure linkage table. Set
- it up. */
+ /* We must allocate the symbol in our .dynbss section, which will
+ become part of the .bss section of the executable. There will be
+ an entry for this symbol in the .dynsym section. The dynamic
+ object will contain position independent code, so all references
+ from the dynamic object to this symbol will go through the global
+ offset table. The dynamic linker will use the .dynsym entry to
+ determine the address it must put in the global offset table, so
+ both the dynamic object and the regular object will refer to the
+ same memory location for the variable.
- BFD_ASSERT (h->dynindx != -1);
- BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
+ Of course, if the symbol is sufficiently small, we must instead
+ allocate it in .sbss. FIXME: It would be better to do this if and
+ only if there were actually SDAREL relocs for that symbol. */
+
+ if (h->size <= elf_gp_size (htab->elf.dynobj))
+ s = htab->dynsbss;
+ else
+ s = htab->dynbss;
+ BFD_ASSERT (s != NULL);
+
+ /* We must generate a R_PPC_COPY reloc to tell the dynamic linker to
+ copy the initial value out of the dynamic object and into the
+ runtime process image. We need to remember the offset into the
+ .rela.bss section we are going to use. */
+ if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
+ {
+ asection *srel;
+
+ if (h->size <= elf_gp_size (htab->elf.dynobj))
+ srel = htab->relsbss;
+ else
+ srel = htab->relbss;
+ BFD_ASSERT (srel != NULL);
+ srel->size += sizeof (Elf32_External_Rela);
+ h->needs_copy = 1;
+ }
+
+ /* We need to figure out the alignment required for this symbol. I
+ have no idea how ELF linkers handle this. */
+ power_of_two = bfd_log2 (h->size);
+ if (power_of_two > 4)
+ power_of_two = 4;
+
+ /* Apply the required alignment. */
+ s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
+ if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
+ {
+ if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
+ return FALSE;
+ }
+
+ /* Define the symbol as being at this point in the section. */
+ h->root.u.def.section = s;
+ h->root.u.def.value = s->size;
+
+ /* Increment the section size to make room for the symbol. */
+ s->size += h->size;
+
+ return TRUE;
+}
+\f
+/* Allocate space in associated reloc sections for dynamic relocs. */
+
+static bfd_boolean
+allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf)
+{
+ struct bfd_link_info *info = inf;
+ struct ppc_elf_link_hash_entry *eh;
+ struct ppc_elf_link_hash_table *htab;
+ struct ppc_elf_dyn_relocs *p;
+
+ if (h->root.type == bfd_link_hash_indirect)
+ return TRUE;
+
+ if (h->root.type == bfd_link_hash_warning)
+ /* When warning symbols are created, they **replace** the "real"
+ entry in the hash table, thus we never get to see the real
+ symbol in a hash traversal. So look at it now. */
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ htab = ppc_elf_hash_table (info);
+ if (htab->elf.dynamic_sections_created
+ && h->plt.refcount > 0)
+ {
+ /* Make sure this symbol is output as a dynamic symbol. */
+ if (h->dynindx == -1
+ && !h->forced_local)
+ {
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+
+ if (info->shared
+ || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
+ {
+ asection *s = htab->plt;
+
+ /* If this is the first .plt entry, make room for the special
+ first entry. */
+ if (s->size == 0)
+ s->size += PLT_INITIAL_ENTRY_SIZE;
+
+ /* The PowerPC PLT is actually composed of two parts, the
+ first part is 2 words (for a load and a jump), and then
+ there is a remaining word available at the end. */
+ h->plt.offset = (PLT_INITIAL_ENTRY_SIZE
+ + (PLT_SLOT_SIZE
+ * ((s->size - PLT_INITIAL_ENTRY_SIZE)
+ / PLT_ENTRY_SIZE)));
+
+ /* If this symbol is not defined in a regular file, and we
+ are not generating a shared library, then set the symbol
+ to this location in the .plt. This is required to make
+ function pointers compare as equal between the normal
+ executable and the shared library. */
+ if (! info->shared
+ && !h->def_regular)
+ {
+ h->root.u.def.section = s;
+ h->root.u.def.value = h->plt.offset;
+ }
+
+ /* Make room for this entry. After the 8192nd entry, room
+ for two entries is allocated. */
+ s->size += PLT_ENTRY_SIZE;
+ if ((s->size - PLT_INITIAL_ENTRY_SIZE) / PLT_ENTRY_SIZE
+ > PLT_NUM_SINGLE_ENTRIES)
+ s->size += PLT_ENTRY_SIZE;
+
+ /* We also need to make an entry in the .rela.plt section. */
+ htab->relplt->size += sizeof (Elf32_External_Rela);
+ }
+ else
+ {
+ h->plt.offset = (bfd_vma) -1;
+ h->needs_plt = 0;
+ }
+ }
+ else
+ {
+ h->plt.offset = (bfd_vma) -1;
+ h->needs_plt = 0;
+ }
+
+ eh = (struct ppc_elf_link_hash_entry *) h;
+ if (eh->elf.got.refcount > 0)
+ {
+ /* Make sure this symbol is output as a dynamic symbol. */
+ if (eh->elf.dynindx == -1
+ && !eh->elf.forced_local)
+ {
+ if (!bfd_elf_link_record_dynamic_symbol (info, &eh->elf))
+ return FALSE;
+ }
+
+ if (eh->tls_mask == (TLS_TLS | TLS_LD)
+ && !eh->elf.def_dynamic)
+ /* If just an LD reloc, we'll just use htab->tlsld_got.offset. */
+ eh->elf.got.offset = (bfd_vma) -1;
+ else
+ {
+ bfd_boolean dyn;
+ eh->elf.got.offset = htab->got->size;
+ if ((eh->tls_mask & TLS_TLS) != 0)
+ {
+ if ((eh->tls_mask & TLS_LD) != 0)
+ htab->got->size += 8;
+ if ((eh->tls_mask & TLS_GD) != 0)
+ htab->got->size += 8;
+ if ((eh->tls_mask & (TLS_TPREL | TLS_TPRELGD)) != 0)
+ htab->got->size += 4;
+ if ((eh->tls_mask & TLS_DTPREL) != 0)
+ htab->got->size += 4;
+ }
+ else
+ htab->got->size += 4;
+ dyn = htab->elf.dynamic_sections_created;
+ if ((info->shared
+ || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, &eh->elf))
+ && (ELF_ST_VISIBILITY (eh->elf.other) == STV_DEFAULT
+ || eh->elf.root.type != bfd_link_hash_undefweak))
+ {
+ /* All the entries we allocated need relocs. */
+ htab->relgot->size
+ += ((htab->got->size - eh->elf.got.offset) / 4
+ * sizeof (Elf32_External_Rela));
+ /* Except LD only needs one. */
+ if ((eh->tls_mask & TLS_LD) != 0)
+ htab->relgot->size -= sizeof (Elf32_External_Rela);
+ }
+ }
+ }
+ else
+ eh->elf.got.offset = (bfd_vma) -1;
+
+ if (eh->dyn_relocs == NULL)
+ return TRUE;
+
+ /* In the shared -Bsymbolic case, discard space allocated for
+ dynamic pc-relative relocs against symbols which turn out to be
+ defined in regular objects. For the normal shared case, discard
+ space for relocs that have become local due to symbol visibility
+ changes. */
+
+ if (info->shared)
+ {
+ /* Relocs that use pc_count are those that appear on a call insn,
+ or certain REL relocs (see MUST_BE_DYN_RELOC) that can be
+ generated via assembly. We want calls to protected symbols to
+ resolve directly to the function rather than going via the plt.
+ If people want function pointer comparisons to work as expected
+ then they should avoid writing weird assembly. */
+ if (SYMBOL_CALLS_LOCAL (info, h))
+ {
+ struct ppc_elf_dyn_relocs **pp;
+
+ for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
+ {
+ p->count -= p->pc_count;
+ p->pc_count = 0;
+ if (p->count == 0)
+ *pp = p->next;
+ else
+ pp = &p->next;
+ }
+ }
+
+ /* Also discard relocs on undefined weak syms with non-default
+ visibility. */
+ if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
+ && h->root.type == bfd_link_hash_undefweak)
+ eh->dyn_relocs = NULL;
+
+ /* Make sure undefined weak symbols are output as a dynamic symbol
+ in PIEs. */
+ if (info->pie
+ && eh->dyn_relocs != NULL
+ && h->dynindx == -1
+ && h->root.type == bfd_link_hash_undefweak
+ && !h->forced_local)
+ {
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+ }
+ else if (ELIMINATE_COPY_RELOCS)
+ {
+ /* For the non-shared case, discard space for relocs against
+ symbols which turn out to need copy relocs or are not
+ dynamic. */
+
+ if (!h->non_got_ref
+ && h->def_dynamic
+ && !h->def_regular)
+ {
+ /* Make sure this symbol is output as a dynamic symbol.
+ Undefined weak syms won't yet be marked as dynamic. */
+ if (h->dynindx == -1
+ && !h->forced_local)
+ {
+ if (! bfd_elf_link_record_dynamic_symbol (info, h))
+ return FALSE;
+ }
+
+ /* If that succeeded, we know we'll be keeping all the
+ relocs. */
+ if (h->dynindx != -1)
+ goto keep;
+ }
+
+ eh->dyn_relocs = NULL;
+
+ keep: ;
+ }
+
+ /* Finally, allocate space. */
+ for (p = eh->dyn_relocs; p != NULL; p = p->next)
+ {
+ asection *sreloc = elf_section_data (p->sec)->sreloc;
+ sreloc->size += p->count * sizeof (Elf32_External_Rela);
+ }
+
+ return TRUE;
+}
+
+/* Find any dynamic relocs that apply to read-only sections. */
+
+static bfd_boolean
+readonly_dynrelocs (struct elf_link_hash_entry *h, void *info)
+{
+ struct ppc_elf_dyn_relocs *p;
+
+ if (h->root.type == bfd_link_hash_indirect)
+ return TRUE;
+
+ if (h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ for (p = ppc_elf_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
+ {
+ asection *s = p->sec->output_section;
+
+ if (s != NULL
+ && ((s->flags & (SEC_READONLY | SEC_ALLOC))
+ == (SEC_READONLY | SEC_ALLOC)))
+ {
+ ((struct bfd_link_info *) info)->flags |= DF_TEXTREL;
+
+ /* Not an error, just cut short the traversal. */
+ return FALSE;
+ }
+ }
+ return TRUE;
+}
+
+/* Set the sizes of the dynamic sections. */
+
+static bfd_boolean
+ppc_elf_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
+ struct bfd_link_info *info)
+{
+ struct ppc_elf_link_hash_table *htab;
+ asection *s;
+ bfd_boolean relocs;
+ bfd *ibfd;
+
+#ifdef DEBUG
+ fprintf (stderr, "ppc_elf_size_dynamic_sections called\n");
+#endif
+
+ htab = ppc_elf_hash_table (info);
+ BFD_ASSERT (htab->elf.dynobj != NULL);
+
+ if (elf_hash_table (info)->dynamic_sections_created)
+ {
+ /* Set the contents of the .interp section to the interpreter. */
+ if (info->executable)
+ {
+ s = bfd_get_section_by_name (htab->elf.dynobj, ".interp");
+ BFD_ASSERT (s != NULL);
+ s->size = sizeof ELF_DYNAMIC_INTERPRETER;
+ s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
+ }
+ }
+
+ if (htab->tlsld_got.refcount > 0)
+ {
+ htab->tlsld_got.offset = htab->got->size;
+ htab->got->size += 8;
+ if (info->shared)
+ htab->relgot->size += sizeof (Elf32_External_Rela);
+ }
+ else
+ htab->tlsld_got.offset = (bfd_vma) -1;
+
+ /* Set up .got offsets for local syms, and space for local dynamic
+ relocs. */
+ for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
+ {
+ bfd_signed_vma *local_got;
+ bfd_signed_vma *end_local_got;
+ char *lgot_masks;
+ bfd_size_type locsymcount;
+ Elf_Internal_Shdr *symtab_hdr;
+ asection *srel;
+
+ if (!is_ppc_elf_target (ibfd->xvec))
+ continue;
+
+ for (s = ibfd->sections; s != NULL; s = s->next)
+ {
+ struct ppc_elf_dyn_relocs *p;
+
+ for (p = ((struct ppc_elf_dyn_relocs *)
+ elf_section_data (s)->local_dynrel);
+ p != NULL;
+ p = p->next)
+ {
+ if (!bfd_is_abs_section (p->sec)
+ && bfd_is_abs_section (p->sec->output_section))
+ {
+ /* Input section has been discarded, either because
+ it is a copy of a linkonce section or due to
+ linker script /DISCARD/, so we'll be discarding
+ the relocs too. */
+ }
+ else if (p->count != 0)
+ {
+ elf_section_data (p->sec)->sreloc->size
+ += p->count * sizeof (Elf32_External_Rela);
+ if ((p->sec->output_section->flags
+ & (SEC_READONLY | SEC_ALLOC))
+ == (SEC_READONLY | SEC_ALLOC))
+ info->flags |= DF_TEXTREL;
+ }
+ }
+ }
+
+ local_got = elf_local_got_refcounts (ibfd);
+ if (!local_got)
+ continue;
+
+ symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
+ locsymcount = symtab_hdr->sh_info;
+ end_local_got = local_got + locsymcount;
+ lgot_masks = (char *) end_local_got;
+ s = htab->got;
+ srel = htab->relgot;
+ for (; local_got < end_local_got; ++local_got, ++lgot_masks)
+ if (*local_got > 0)
+ {
+ if (*lgot_masks == (TLS_TLS | TLS_LD))
+ {
+ /* If just an LD reloc, we'll just use
+ htab->tlsld_got.offset. */
+ if (htab->tlsld_got.offset == (bfd_vma) -1)
+ {
+ htab->tlsld_got.offset = s->size;
+ s->size += 8;
+ if (info->shared)
+ srel->size += sizeof (Elf32_External_Rela);
+ }
+ *local_got = (bfd_vma) -1;
+ }
+ else
+ {
+ *local_got = s->size;
+ if ((*lgot_masks & TLS_TLS) != 0)
+ {
+ if ((*lgot_masks & TLS_GD) != 0)
+ s->size += 8;
+ if ((*lgot_masks & (TLS_TPREL | TLS_TPRELGD)) != 0)
+ s->size += 4;
+ if ((*lgot_masks & TLS_DTPREL) != 0)
+ s->size += 4;
+ }
+ else
+ s->size += 4;
+ if (info->shared)
+ srel->size += ((s->size - *local_got) / 4
+ * sizeof (Elf32_External_Rela));
+ }
+ }
+ else
+ *local_got = (bfd_vma) -1;
+ }
+
+ /* Allocate space for global sym dynamic relocs. */
+ elf_link_hash_traverse (elf_hash_table (info), allocate_dynrelocs, info);
+
+ /* We've now determined the sizes of the various dynamic sections.
+ Allocate memory for them. */
+ relocs = FALSE;
+ for (s = htab->elf.dynobj->sections; s != NULL; s = s->next)
+ {
+ if ((s->flags & SEC_LINKER_CREATED) == 0)
+ continue;
+
+ if (s == htab->plt
+ || s == htab->got
+ || s == htab->sbss)
+ {
+ /* Strip this section if we don't need it; see the
+ comment below. */
+ }
+ else if (s == htab->sdata[0].section
+ || s == htab->sdata[1].section)
+ {
+ /* Strip these too. */
+ }
+ else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
+ {
+ if (s->size == 0)
+ {
+ /* If we don't need this section, strip it from the
+ output file. This is mostly to handle .rela.bss and
+ .rela.plt. We must create both sections in
+ create_dynamic_sections, because they must be created
+ before the linker maps input sections to output
+ sections. The linker does that before
+ adjust_dynamic_symbol is called, and it is that
+ function which decides whether anything needs to go
+ into these sections. */
+ }
+ else
+ {
+ /* Remember whether there are any relocation sections. */
+ relocs = TRUE;
+
+ /* We use the reloc_count field as a counter if we need
+ to copy relocs into the output file. */
+ s->reloc_count = 0;
+ }
+ }
+ else
+ {
+ /* It's not one of our sections, so don't allocate space. */
+ continue;
+ }
+
+ if (s->size == 0)
+ {
+ _bfd_strip_section_from_output (info, s);
+ continue;
+ }
+
+ if (s == htab->sbss)
+ continue;
+
+ /* Allocate memory for the section contents. */
+ s->contents = bfd_zalloc (htab->elf.dynobj, s->size);
+ if (s->contents == NULL)
+ return FALSE;
+ }
+
+ if (htab->elf.dynamic_sections_created)
+ {
+ /* Add some entries to the .dynamic section. We fill in the
+ values later, in ppc_elf_finish_dynamic_sections, but we
+ must add the entries now so that we get the correct size for
+ the .dynamic section. The DT_DEBUG entry is filled in by the
+ dynamic linker and used by the debugger. */
+#define add_dynamic_entry(TAG, VAL) \
+ _bfd_elf_add_dynamic_entry (info, TAG, VAL)
+
+ if (info->executable)
+ {
+ if (!add_dynamic_entry (DT_DEBUG, 0))
+ return FALSE;
+ }
+
+ if (htab->plt != NULL && htab->plt->size != 0)
+ {
+ if (!add_dynamic_entry (DT_PLTGOT, 0)
+ || !add_dynamic_entry (DT_PLTRELSZ, 0)
+ || !add_dynamic_entry (DT_PLTREL, DT_RELA)
+ || !add_dynamic_entry (DT_JMPREL, 0))
+ return FALSE;
+ }
+
+ if (relocs)
+ {
+ if (!add_dynamic_entry (DT_RELA, 0)
+ || !add_dynamic_entry (DT_RELASZ, 0)
+ || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
+ return FALSE;
+ }
+
+ /* If any dynamic relocs apply to a read-only section, then we
+ need a DT_TEXTREL entry. */
+ if ((info->flags & DF_TEXTREL) == 0)
+ elf_link_hash_traverse (elf_hash_table (info), readonly_dynrelocs,
+ info);
+
+ if ((info->flags & DF_TEXTREL) != 0)
+ {
+ if (!add_dynamic_entry (DT_TEXTREL, 0))
+ return FALSE;
+ }
+ }
+#undef add_dynamic_entry
+
+ return TRUE;
+}
+\f
+#define ARRAY_SIZE(a) (sizeof (a) / sizeof ((a)[0]))
+
+static const int shared_stub_entry[] =
+ {
+ 0x7c0802a6, /* mflr 0 */
+ 0x429f0005, /* bcl 20, 31, .Lxxx */
+ 0x7d6802a6, /* mflr 11 */
+ 0x3d6b0000, /* addis 11, 11, (xxx-.Lxxx)@ha */
+ 0x396b0018, /* addi 11, 11, (xxx-.Lxxx)@l */
+ 0x7c0803a6, /* mtlr 0 */
+ 0x7d6903a6, /* mtctr 11 */
+ 0x4e800420, /* bctr */
+ };
+
+static const int stub_entry[] =
+ {
+ 0x3d600000, /* lis 11,xxx@ha */
+ 0x396b0000, /* addi 11,11,xxx@l */
+ 0x7d6903a6, /* mtctr 11 */
+ 0x4e800420, /* bctr */
+ };
+
+static bfd_boolean
+ppc_elf_relax_section (bfd *abfd,
+ asection *isec,
+ struct bfd_link_info *link_info,
+ bfd_boolean *again)
+{
+ struct one_fixup
+ {
+ struct one_fixup *next;
+ asection *tsec;
+ bfd_vma toff;
+ bfd_vma trampoff;
+ };
+
+ Elf_Internal_Shdr *symtab_hdr;
+ bfd_byte *contents = NULL;
+ Elf_Internal_Sym *isymbuf = NULL;
+ Elf_Internal_Rela *internal_relocs = NULL;
+ Elf_Internal_Rela *irel, *irelend;
+ struct one_fixup *fixups = NULL;
+ bfd_boolean changed;
+ struct ppc_elf_link_hash_table *ppc_info;
+ bfd_size_type trampoff;
+
+ *again = FALSE;
+
+ /* Nothing to do if there are no relocations. */
+ if ((isec->flags & SEC_RELOC) == 0 || isec->reloc_count == 0)
+ return TRUE;
+
+ trampoff = (isec->size + 3) & (bfd_vma) -4;
+ /* Space for a branch around any trampolines. */
+ trampoff += 4;
+
+ symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
+
+ /* Get a copy of the native relocations. */
+ internal_relocs = _bfd_elf_link_read_relocs (abfd, isec, NULL, NULL,
+ link_info->keep_memory);
+ if (internal_relocs == NULL)
+ goto error_return;
+
+ ppc_info = ppc_elf_hash_table (link_info);
+ irelend = internal_relocs + isec->reloc_count;
+
+ for (irel = internal_relocs; irel < irelend; irel++)
+ {
+ unsigned long r_type = ELF32_R_TYPE (irel->r_info);
+ bfd_vma symaddr, reladdr, toff, roff;
+ asection *tsec;
+ struct one_fixup *f;
+ size_t insn_offset = 0;
+ bfd_vma max_branch_offset, val;
+ bfd_byte *hit_addr;
+ unsigned long t0;
+ unsigned char sym_type;
+
+ switch (r_type)
+ {
+ case R_PPC_REL24:
+ case R_PPC_LOCAL24PC:
+ case R_PPC_PLTREL24:
+ max_branch_offset = 1 << 25;
+ break;
+
+ case R_PPC_REL14:
+ case R_PPC_REL14_BRTAKEN:
+ case R_PPC_REL14_BRNTAKEN:
+ max_branch_offset = 1 << 15;
+ break;
+
+ default:
+ continue;
+ }
+
+ /* Get the value of the symbol referred to by the reloc. */
+ if (ELF32_R_SYM (irel->r_info) < symtab_hdr->sh_info)
+ {
+ /* A local symbol. */
+ Elf_Internal_Sym *isym;
+
+ /* Read this BFD's local symbols. */
+ if (isymbuf == NULL)
+ {
+ isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents;
+ if (isymbuf == NULL)
+ isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr,
+ symtab_hdr->sh_info, 0,
+ NULL, NULL, NULL);
+ if (isymbuf == 0)
+ goto error_return;
+ }
+ isym = isymbuf + ELF32_R_SYM (irel->r_info);
+ if (isym->st_shndx == SHN_UNDEF)
+ continue; /* We can't do anything with undefined symbols. */
+ else if (isym->st_shndx == SHN_ABS)
+ tsec = bfd_abs_section_ptr;
+ else if (isym->st_shndx == SHN_COMMON)
+ tsec = bfd_com_section_ptr;
+ else
+ tsec = bfd_section_from_elf_index (abfd, isym->st_shndx);
+
+ toff = isym->st_value;
+ sym_type = ELF_ST_TYPE (isym->st_info);
+ }
+ else
+ {
+ /* Global symbol handling. */
+ unsigned long indx;
+ struct elf_link_hash_entry *h;
+
+ indx = ELF32_R_SYM (irel->r_info) - symtab_hdr->sh_info;
+ h = elf_sym_hashes (abfd)[indx];
+
+ while (h->root.type == bfd_link_hash_indirect
+ || h->root.type == bfd_link_hash_warning)
+ h = (struct elf_link_hash_entry *) h->root.u.i.link;
+
+ if (r_type == R_PPC_PLTREL24
+ && ppc_info->plt != NULL
+ && h->plt.offset != (bfd_vma) -1)
+ {
+ tsec = ppc_info->plt;
+ toff = h->plt.offset;
+ }
+ else if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ tsec = h->root.u.def.section;
+ toff = h->root.u.def.value;
+ }
+ else
+ continue;
+
+ sym_type = h->type;
+ }
+
+ /* If the branch and target are in the same section, you have
+ no hope of adding stubs. We'll error out later should the
+ branch overflow. */
+ if (tsec == isec)
+ continue;
+
+ /* There probably isn't any reason to handle symbols in
+ SEC_MERGE sections; SEC_MERGE doesn't seem a likely
+ attribute for a code section, and we are only looking at
+ branches. However, implement it correctly here as a
+ reference for other target relax_section functions. */
+ if (0 && tsec->sec_info_type == ELF_INFO_TYPE_MERGE)
+ {
+ /* At this stage in linking, no SEC_MERGE symbol has been
+ adjusted, so all references to such symbols need to be
+ passed through _bfd_merged_section_offset. (Later, in
+ relocate_section, all SEC_MERGE symbols *except* for
+ section symbols have been adjusted.)
+
+ gas may reduce relocations against symbols in SEC_MERGE
+ sections to a relocation against the section symbol when
+ the original addend was zero. When the reloc is against
+ a section symbol we should include the addend in the
+ offset passed to _bfd_merged_section_offset, since the
+ location of interest is the original symbol. On the
+ other hand, an access to "sym+addend" where "sym" is not
+ a section symbol should not include the addend; Such an
+ access is presumed to be an offset from "sym"; The
+ location of interest is just "sym". */
+ if (sym_type == STT_SECTION)
+ toff += irel->r_addend;
+
+ toff = _bfd_merged_section_offset (abfd, &tsec,
+ elf_section_data (tsec)->sec_info,
+ toff);
+
+ if (sym_type != STT_SECTION)
+ toff += irel->r_addend;
+ }
+ else
+ toff += irel->r_addend;
+
+ symaddr = tsec->output_section->vma + tsec->output_offset + toff;
+
+ roff = irel->r_offset;
+ reladdr = isec->output_section->vma + isec->output_offset + roff;
+
+ /* If the branch is in range, no need to do anything. */
+ if (symaddr - reladdr + max_branch_offset < 2 * max_branch_offset)
+ continue;
+
+ /* Look for an existing fixup to this address. */
+ for (f = fixups; f ; f = f->next)
+ if (f->tsec == tsec && f->toff == toff)
+ break;
+
+ if (f == NULL)
+ {
+ size_t size;
+ unsigned long stub_rtype;
+
+ val = trampoff - roff;
+ if (val >= max_branch_offset)
+ /* Oh dear, we can't reach a trampoline. Don't try to add
+ one. We'll report an error later. */
+ continue;
+
+ if (link_info->shared)
+ {
+ size = 4 * ARRAY_SIZE (shared_stub_entry);
+ insn_offset = 12;
+ stub_rtype = R_PPC_RELAX32PC;
+ }
+ else
+ {
+ size = 4 * ARRAY_SIZE (stub_entry);
+ insn_offset = 0;
+ stub_rtype = R_PPC_RELAX32;
+ }
+
+ if (R_PPC_RELAX32_PLT - R_PPC_RELAX32
+ != R_PPC_RELAX32PC_PLT - R_PPC_RELAX32PC)
+ abort ();
+ if (tsec == ppc_info->plt)
+ stub_rtype += R_PPC_RELAX32_PLT - R_PPC_RELAX32;
+
+ /* Hijack the old relocation. Since we need two
+ relocations for this use a "composite" reloc. */
+ irel->r_info = ELF32_R_INFO (ELF32_R_SYM (irel->r_info),
+ stub_rtype);
+ irel->r_offset = trampoff + insn_offset;
+
+ /* Record the fixup so we don't do it again this section. */
+ f = bfd_malloc (sizeof (*f));
+ f->next = fixups;
+ f->tsec = tsec;
+ f->toff = toff;
+ f->trampoff = trampoff;
+ fixups = f;
- /* We don't need to fill in the .plt. The ppc dynamic linker
- will fill it in. */
+ trampoff += size;
+ }
+ else
+ {
+ val = f->trampoff - roff;
+ if (val >= max_branch_offset)
+ continue;
- /* Fill in the entry in the .rela.plt section. */
- rela.r_offset = (htab->plt->output_section->vma
- + htab->plt->output_offset
- + h->plt.offset);
- rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
- rela.r_addend = 0;
+ /* Nop out the reloc, since we're finalizing things here. */
+ irel->r_info = ELF32_R_INFO (0, R_PPC_NONE);
+ }
- reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
- if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
- reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
- loc = (htab->relplt->contents
- + reloc_index * sizeof (Elf32_External_Rela));
- bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ /* Get the section contents. */
+ if (contents == NULL)
+ {
+ /* Get cached copy if it exists. */
+ if (elf_section_data (isec)->this_hdr.contents != NULL)
+ contents = elf_section_data (isec)->this_hdr.contents;
+ else
+ {
+ /* Go get them off disk. */
+ if (!bfd_malloc_and_get_section (abfd, isec, &contents))
+ goto error_return;
+ }
+ }
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
+ /* Fix up the existing branch to hit the trampoline. */
+ hit_addr = contents + roff;
+ switch (r_type)
{
- /* Mark the symbol as undefined, rather than as defined in
- the .plt section. Leave the value alone. */
- sym->st_shndx = SHN_UNDEF;
- /* If the symbol is weak, we do need to clear the value.
- Otherwise, the PLT entry would provide a definition for
- the symbol even if the symbol wasn't defined anywhere,
- and so the symbol would never be NULL. */
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
- == 0)
- sym->st_value = 0;
+ case R_PPC_REL24:
+ case R_PPC_LOCAL24PC:
+ case R_PPC_PLTREL24:
+ t0 = bfd_get_32 (abfd, hit_addr);
+ t0 &= ~0x3fffffc;
+ t0 |= val & 0x3fffffc;
+ bfd_put_32 (abfd, t0, hit_addr);
+ break;
+
+ case R_PPC_REL14:
+ case R_PPC_REL14_BRTAKEN:
+ case R_PPC_REL14_BRNTAKEN:
+ t0 = bfd_get_32 (abfd, hit_addr);
+ t0 &= ~0xfffc;
+ t0 |= val & 0xfffc;
+ bfd_put_32 (abfd, t0, hit_addr);
+ break;
}
}
- if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
+ /* Write out the trampolines. */
+ changed = fixups != NULL;
+ if (fixups != NULL)
{
- asection *s;
- Elf_Internal_Rela rela;
- bfd_byte *loc;
+ const int *stub;
+ bfd_byte *dest;
+ bfd_vma val;
+ int i, size;
- /* This symbols needs a copy reloc. Set it up. */
+ do
+ {
+ struct one_fixup *f = fixups;
+ fixups = fixups->next;
+ free (f);
+ }
+ while (fixups);
-#ifdef DEBUG
- fprintf (stderr, ", copy");
-#endif
+ contents = bfd_realloc (contents, trampoff);
+ if (contents == NULL)
+ goto error_return;
- BFD_ASSERT (h->dynindx != -1);
+ isec->size = (isec->size + 3) & (bfd_vma) -4;
+ /* Branch around the trampolines. */
+ val = trampoff - isec->size + 0x48000000;
+ dest = contents + isec->size;
+ isec->size = trampoff;
+ bfd_put_32 (abfd, val, dest);
+ dest += 4;
- if (h->size <= elf_gp_size (htab->elf.dynobj))
- s = htab->relsbss;
+ if (link_info->shared)
+ {
+ stub = shared_stub_entry;
+ size = ARRAY_SIZE (shared_stub_entry);
+ }
else
- s = htab->relbss;
- BFD_ASSERT (s != NULL);
+ {
+ stub = stub_entry;
+ size = ARRAY_SIZE (stub_entry);
+ }
- rela.r_offset = (h->root.u.def.value
- + h->root.u.def.section->output_section->vma
- + h->root.u.def.section->output_offset);
- rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
- rela.r_addend = 0;
- loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
- bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ i = 0;
+ while (dest < contents + trampoff)
+ {
+ bfd_put_32 (abfd, stub[i], dest);
+ i++;
+ if (i == size)
+ i = 0;
+ dest += 4;
+ }
+ BFD_ASSERT (i == 0);
}
-#ifdef DEBUG
- fprintf (stderr, "\n");
-#endif
+ if (isymbuf != NULL
+ && symtab_hdr->contents != (unsigned char *) isymbuf)
+ {
+ if (! link_info->keep_memory)
+ free (isymbuf);
+ else
+ {
+ /* Cache the symbols for elf_link_input_bfd. */
+ symtab_hdr->contents = (unsigned char *) isymbuf;
+ }
+ }
- /* Mark some specially defined symbols as absolute. */
- if (strcmp (h->root.root.string, "_DYNAMIC") == 0
- || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
- || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
- sym->st_shndx = SHN_ABS;
+ if (contents != NULL
+ && elf_section_data (isec)->this_hdr.contents != contents)
+ {
+ if (!changed && !link_info->keep_memory)
+ free (contents);
+ else
+ {
+ /* Cache the section contents for elf_link_input_bfd. */
+ elf_section_data (isec)->this_hdr.contents = contents;
+ }
+ }
+
+ if (elf_section_data (isec)->relocs != internal_relocs)
+ {
+ if (!changed)
+ free (internal_relocs);
+ else
+ elf_section_data (isec)->relocs = internal_relocs;
+ }
+ *again = changed;
return TRUE;
+
+ error_return:
+ if (isymbuf != NULL && (unsigned char *) isymbuf != symtab_hdr->contents)
+ free (isymbuf);
+ if (contents != NULL
+ && elf_section_data (isec)->this_hdr.contents != contents)
+ free (contents);
+ if (internal_relocs != NULL
+ && elf_section_data (isec)->relocs != internal_relocs)
+ free (internal_relocs);
+ return FALSE;
}
\f
-/* Finish up the dynamic sections. */
+/* Set SYM_NAME to VAL if the symbol exists and is undefined. */
-static bfd_boolean
-ppc_elf_finish_dynamic_sections (bfd *output_bfd,
- struct bfd_link_info *info)
+static void
+set_linker_sym (struct ppc_elf_link_hash_table *htab,
+ const char *sym_name,
+ bfd_vma val)
{
- asection *sdyn;
- struct ppc_elf_link_hash_table *htab;
+ struct elf_link_hash_entry *h;
+ h = elf_link_hash_lookup (&htab->elf, sym_name, FALSE, FALSE, FALSE);
+ if (h != NULL && h->root.type == bfd_link_hash_undefined)
+ {
+ h->root.type = bfd_link_hash_defined;
+ h->root.u.def.section = bfd_abs_section_ptr;
+ h->root.u.def.value = val;
+ h->def_regular = 1;
+ h->type = STT_OBJECT;
+ h->other = STV_HIDDEN;
+ }
+}
-#ifdef DEBUG
- fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
-#endif
+/* Set _SDA_BASE_, _SDA2_BASE, and sbss start and end syms. They are
+ set here rather than via PROVIDE in the default linker script,
+ because using PROVIDE inside an output section statement results in
+ unnecessary output sections. Using PROVIDE outside an output section
+ statement runs the risk of section alignment affecting where the
+ section starts. */
+
+bfd_boolean
+ppc_elf_set_sdata_syms (bfd *obfd, struct bfd_link_info *info)
+{
+ struct ppc_elf_link_hash_table *htab;
+ unsigned i;
+ asection *s;
+ bfd_vma val;
htab = ppc_elf_hash_table (info);
- sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
- if (htab->elf.dynamic_sections_created)
+ for (i = 0; i < 2; i++)
{
- Elf32_External_Dyn *dyncon, *dynconend;
-
- BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
-
- dyncon = (Elf32_External_Dyn *) sdyn->contents;
- dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
- for (; dyncon < dynconend; dyncon++)
- {
- Elf_Internal_Dyn dyn;
- asection *s;
-
- bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
+ elf_linker_section_t *lsect = &htab->sdata[i];
+
+ s = lsect->section;
+ if (s != NULL)
+ s = s->output_section;
+ if (s == NULL)
+ s = bfd_get_section_by_name (obfd, lsect->name);
+ if (s == NULL)
+ s = bfd_get_section_by_name (obfd, lsect->bss_name);
+
+ val = 0;
+ if (s != NULL)
+ val = s->vma + 32768;
+ lsect->sym_val = val;
+
+ set_linker_sym (htab, lsect->sym_name, val);
+ }
- switch (dyn.d_tag)
- {
- case DT_PLTGOT:
- s = htab->plt;
- dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
- break;
+ s = bfd_get_section_by_name (obfd, ".sbss");
+ val = 0;
+ if (s != NULL)
+ val = s->vma;
+ set_linker_sym (htab, "__sbss_start", val);
+ set_linker_sym (htab, "___sbss_start", val);
+ if (s != NULL)
+ val += s->size;
+ set_linker_sym (htab, "__sbss_end", val);
+ set_linker_sym (htab, "___sbss_end", val);
+ return TRUE;
+}
+\f
+/* Fill in the address for a pointer generated in a linker section. */
- case DT_PLTRELSZ:
- dyn.d_un.d_val = htab->relplt->_raw_size;
- break;
+static bfd_vma
+elf_finish_pointer_linker_section (bfd *input_bfd,
+ elf_linker_section_t *lsect,
+ struct elf_link_hash_entry *h,
+ bfd_vma relocation,
+ const Elf_Internal_Rela *rel)
+{
+ elf_linker_section_pointers_t *linker_section_ptr;
- case DT_JMPREL:
- s = htab->relplt;
- dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
- break;
+ BFD_ASSERT (lsect != NULL);
- default:
- continue;
- }
+ if (h != NULL)
+ {
+ /* Handle global symbol. */
+ struct ppc_elf_link_hash_entry *eh;
- bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
- }
+ eh = (struct ppc_elf_link_hash_entry *) h;
+ BFD_ASSERT (eh->elf.def_regular);
+ linker_section_ptr = eh->linker_section_pointer;
}
-
- /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
- easily find the address of the _GLOBAL_OFFSET_TABLE_. */
- if (htab->got)
+ else
{
- unsigned char *contents = htab->got->contents;
- bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
-
- if (sdyn == NULL)
- bfd_put_32 (output_bfd, 0, contents + 4);
- else
- bfd_put_32 (output_bfd,
- sdyn->output_section->vma + sdyn->output_offset,
- contents + 4);
+ /* Handle local symbol. */
+ unsigned long r_symndx = ELF32_R_SYM (rel->r_info);
- elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
+ BFD_ASSERT (elf_local_ptr_offsets (input_bfd) != NULL);
+ linker_section_ptr = elf_local_ptr_offsets (input_bfd)[r_symndx];
}
- return TRUE;
+ linker_section_ptr = elf_find_pointer_linker_section (linker_section_ptr,
+ rel->r_addend,
+ lsect);
+ BFD_ASSERT (linker_section_ptr != NULL);
+
+ /* Offset will always be a multiple of four, so use the bottom bit
+ as a "written" flag. */
+ if ((linker_section_ptr->offset & 1) == 0)
+ {
+ bfd_put_32 (lsect->section->owner,
+ relocation + linker_section_ptr->addend,
+ lsect->section->contents + linker_section_ptr->offset);
+ linker_section_ptr->offset += 1;
+ }
+
+ relocation = (lsect->section->output_offset
+ + linker_section_ptr->offset - 1
+ - 0x8000);
+
+#ifdef DEBUG
+ fprintf (stderr,
+ "Finish pointer in linker section %s, offset = %ld (0x%lx)\n",
+ lsect->name, (long) relocation, (long) relocation);
+#endif
+
+ /* Subtract out the addend, because it will get added back in by the normal
+ processing. */
+ return relocation - linker_section_ptr->addend;
}
-\f
+
/* The RELOCATE_SECTION function is called by the ELF backend linker
to handle the relocations for a section.
bfd_boolean ret = TRUE;
#ifdef DEBUG
- fprintf (stderr, "ppc_elf_relocate_section called for %s section %s, "
- "%ld relocations%s\n",
- bfd_archive_filename (input_bfd),
- bfd_section_name(input_bfd, input_section),
- (long) input_section->reloc_count,
- (info->relocatable) ? " (relocatable)" : "");
+ _bfd_error_handler ("ppc_elf_relocate_section called for %B section %A, "
+ "%ld relocations%s",
+ input_bfd, input_section,
+ (long) input_section->reloc_count,
+ (info->relocatable) ? " (relocatable)" : "");
#endif
if (info->relocatable)
{
sym = local_syms + r_symndx;
sec = local_sections[r_symndx];
- sym_name = bfd_elf_local_sym_name (input_bfd, sym);
+ sym_name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym);
relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
}
else
{
- RELOC_FOR_GLOBAL_SYMBOL (h, sym_hashes, r_symndx,
- symtab_hdr, relocation, sec,
- unresolved_reloc, info,
- warned);
+ RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
+ r_symndx, symtab_hdr, sym_hashes,
+ h, sec, relocation,
+ unresolved_reloc, warned);
sym_name = h->root.root.string;
}
branch_bit = BRANCH_PREDICT_BIT;
/* Fall thru */
- /* Branch not taken predicition relocations. */
+ /* Branch not taken prediction relocations. */
case R_PPC_ADDR14_BRNTAKEN:
case R_PPC_REL14_BRNTAKEN:
insn = bfd_get_32 (output_bfd, contents + rel->r_offset);
{
default:
(*_bfd_error_handler)
- (_("%s: unknown relocation type %d for symbol %s"),
- bfd_archive_filename (input_bfd), (int) r_type, sym_name);
+ (_("%B: unknown relocation type %d for symbol %s"),
+ input_bfd, (int) r_type, sym_name);
bfd_set_error (bfd_error_bad_value);
ret = FALSE;
indx = 0;
if (tls_type == (TLS_TLS | TLS_LD)
&& (h == NULL
- || !(h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC)))
+ || !h->def_dynamic))
offp = &htab->tlsld_got.offset;
else if (h != NULL)
{
if (offp == &htab->tlsld_got.offset)
tls_m = TLS_LD;
else if (h == NULL
- || !(h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_DYNAMIC))
+ || !h->def_dynamic)
tls_m &= ~TLS_LD;
/* We might have multiple got entries for this sym.
{
if ((tls_mask & TLS_LD) != 0
&& !(h == NULL
- || !(h->elf_link_hash_flags
- & ELF_LINK_HASH_DEF_DYNAMIC)))
+ || !h->def_dynamic))
off += 8;
if (tls_type != (TLS_TLS | TLS_GD))
{
got at entry m+n bears little relation to the entry m. */
if (addend != 0)
(*_bfd_error_handler)
- (_("%s(%s+0x%lx): non-zero addend on %s reloc against `%s'"),
- bfd_archive_filename (input_bfd),
- bfd_get_section_name (input_bfd, input_section),
+ (_("%B(%A+0x%lx): non-zero addend on %s reloc against `%s'"),
+ input_bfd,
+ input_section,
(long) rel->r_offset,
howto->name,
sym_name);
&& (input_section->flags & SEC_ALLOC) != 0
&& h != NULL
&& h->dynindx != -1
- && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0))
+ && !h->non_got_ref
+ && h->def_dynamic
+ && !h->def_regular))
{
int skip;
}
break;
+ case R_PPC_RELAX32PC_PLT:
+ case R_PPC_RELAX32_PLT:
+ BFD_ASSERT (h != NULL
+ && h->plt.offset != (bfd_vma) -1
+ && htab->plt != NULL);
+
+ relocation = (htab->plt->output_section->vma
+ + htab->plt->output_offset
+ + h->plt.offset);
+ if (r_type == R_PPC_RELAX32_PLT)
+ goto relax32;
+ /* Fall thru */
+
case R_PPC_RELAX32PC:
relocation -= (input_section->output_section->vma
+ input_section->output_offset
+ rel->r_offset - 4);
/* Fall thru */
+
case R_PPC_RELAX32:
+ relax32:
{
unsigned long t0;
unsigned long t1;
/* Indirect .sdata relocation. */
case R_PPC_EMB_SDAI16:
- BFD_ASSERT (htab->sdata != NULL);
+ BFD_ASSERT (htab->sdata[0].section != NULL);
relocation
- = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
- htab->sdata, h, relocation,
- rel, R_PPC_RELATIVE);
+ = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[0],
+ h, relocation, rel);
break;
/* Indirect .sdata2 relocation. */
case R_PPC_EMB_SDA2I16:
- BFD_ASSERT (htab->sdata2 != NULL);
+ BFD_ASSERT (htab->sdata[1].section != NULL);
relocation
- = elf_finish_pointer_linker_section (output_bfd, input_bfd, info,
- htab->sdata2, h, relocation,
- rel, R_PPC_RELATIVE);
+ = elf_finish_pointer_linker_section (input_bfd, &htab->sdata[1],
+ h, relocation, rel);
break;
/* Handle the TOC16 reloc. We want to use the offset within the .got
BFD_ASSERT (sec != NULL);
BFD_ASSERT (bfd_is_und_section (sec)
|| strcmp (bfd_get_section_name (abfd, sec), ".got") == 0
- || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0)
+ || strcmp (bfd_get_section_name (abfd, sec), ".cgot") == 0);
addend -= sec->output_section->vma + sec->output_offset + 0x8000;
break;
case R_PPC_SDAREL16:
{
const char *name;
- const struct elf_link_hash_entry *sh;
BFD_ASSERT (sec != NULL);
name = bfd_get_section_name (abfd, sec->output_section);
&& (name[5] == 0 || name[5] == '.'))))
{
(*_bfd_error_handler)
- (_("%s: the target (%s) of a %s relocation is "
+ (_("%B: the target (%s) of a %s relocation is "
"in the wrong output section (%s)"),
- bfd_archive_filename (input_bfd),
+ input_bfd,
sym_name,
howto->name,
name);
}
- sh = htab->sdata->sym_hash;
- addend -= (sh->root.u.def.value
- + sh->root.u.def.section->output_section->vma
- + sh->root.u.def.section->output_offset);
+ addend -= htab->sdata[0].sym_val;
}
break;
case R_PPC_EMB_SDA2REL:
{
const char *name;
- const struct elf_link_hash_entry *sh;
BFD_ASSERT (sec != NULL);
name = bfd_get_section_name (abfd, sec->output_section);
|| strncmp (name, ".sbss2", 6) == 0))
{
(*_bfd_error_handler)
- (_("%s: the target (%s) of a %s relocation is "
+ (_("%B: the target (%s) of a %s relocation is "
"in the wrong output section (%s)"),
- bfd_archive_filename (input_bfd),
+ input_bfd,
sym_name,
howto->name,
name);
ret = FALSE;
continue;
}
- sh = htab->sdata2->sym_hash;
- addend -= (sh->root.u.def.value
- + sh->root.u.def.section->output_section->vma
- + sh->root.u.def.section->output_offset);
+ addend -= htab->sdata[1].sym_val;
}
break;
case R_PPC_EMB_RELSDA:
{
const char *name;
- const struct elf_link_hash_entry *sh;
int reg;
BFD_ASSERT (sec != NULL);
&& (name[5] == 0 || name[5] == '.'))))
{
reg = 13;
- sh = htab->sdata->sym_hash;
- addend -= (sh->root.u.def.value
- + sh->root.u.def.section->output_section->vma
- + sh->root.u.def.section->output_offset);
+ addend -= htab->sdata[0].sym_val;
}
else if (strncmp (name, ".sdata2", 7) == 0
|| strncmp (name, ".sbss2", 6) == 0)
{
reg = 2;
- sh = htab->sdata2->sym_hash;
- addend -= (sh->root.u.def.value
- + sh->root.u.def.section->output_section->vma
- + sh->root.u.def.section->output_offset);
+ addend -= htab->sdata[1].sym_val;
}
else if (strcmp (name, ".PPC.EMB.sdata0") == 0
else
{
(*_bfd_error_handler)
- (_("%s: the target (%s) of a %s relocation is "
+ (_("%B: the target (%s) of a %s relocation is "
"in the wrong output section (%s)"),
- bfd_archive_filename (input_bfd),
+ input_bfd,
sym_name,
howto->name,
name);
case R_PPC_EMB_RELST_HA:
case R_PPC_EMB_BIT_FLD:
(*_bfd_error_handler)
- (_("%s: relocation %s is not yet supported for symbol %s."),
- bfd_archive_filename (input_bfd),
+ (_("%B: relocation %s is not yet supported for symbol %s."),
+ input_bfd,
howto->name,
sym_name);
if (unresolved_reloc
&& !((input_section->flags & SEC_DEBUGGING) != 0
- && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
+ && h->def_dynamic))
{
(*_bfd_error_handler)
- (_("%s(%s+0x%lx): unresolvable %s relocation against symbol `%s'"),
- bfd_archive_filename (input_bfd),
- bfd_get_section_name (input_bfd, input_section),
+ (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
+ input_bfd,
+ input_section,
(long) rel->r_offset,
howto->name,
sym_name);
}
if (! (*info->callbacks->reloc_overflow) (info,
+ (h ? &h->root : NULL),
sym_name,
howto->name,
rel->r_addend,
else
{
(*_bfd_error_handler)
- (_("%s(%s+0x%lx): %s reloc against `%s': error %d"),
- bfd_archive_filename (input_bfd),
- bfd_get_section_name (input_bfd, input_section),
+ (_("%B(%A+0x%lx): %s reloc against `%s': error %d"),
+ input_bfd, input_section,
(long) rel->r_offset, howto->name, sym_name, (int) r);
ret = FALSE;
}
return ret;
}
-
-static enum elf_reloc_type_class
-ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
-{
- switch (ELF32_R_TYPE (rela->r_info))
- {
- case R_PPC_RELATIVE:
- return reloc_class_relative;
- case R_PPC_REL24:
- case R_PPC_ADDR24:
- case R_PPC_JMP_SLOT:
- return reloc_class_plt;
- case R_PPC_COPY:
- return reloc_class_copy;
- default:
- return reloc_class_normal;
- }
-}
\f
-/* Support for core dump NOTE sections. */
-
-static bfd_boolean
-ppc_elf_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
-{
- int offset;
- unsigned int raw_size;
-
- switch (note->descsz)
- {
- default:
- return FALSE;
-
- case 268: /* Linux/PPC. */
- /* pr_cursig */
- elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
-
- /* pr_pid */
- elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
-
- /* pr_reg */
- offset = 72;
- raw_size = 192;
-
- break;
- }
-
- /* Make a ".reg/999" section. */
- return _bfd_elfcore_make_pseudosection (abfd, ".reg",
- raw_size, note->descpos + offset);
-}
+/* Finish up dynamic symbol handling. We set the contents of various
+ dynamic sections here. */
static bfd_boolean
-ppc_elf_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
-{
- switch (note->descsz)
- {
- default:
- return FALSE;
-
- case 128: /* Linux/PPC elf_prpsinfo. */
- elf_tdata (abfd)->core_program
- = _bfd_elfcore_strndup (abfd, note->descdata + 32, 16);
- elf_tdata (abfd)->core_command
- = _bfd_elfcore_strndup (abfd, note->descdata + 48, 80);
- }
-
- /* Note that for some reason, a spurious space is tacked
- onto the end of the args in some (at least one anyway)
- implementations, so strip it off if it exists. */
-
- {
- char *command = elf_tdata (abfd)->core_command;
- int n = strlen (command);
-
- if (0 < n && command[n - 1] == ' ')
- command[n - 1] = '\0';
- }
-
- return TRUE;
-}
-\f
-/* Very simple linked list structure for recording apuinfo values. */
-typedef struct apuinfo_list
-{
- struct apuinfo_list *next;
- unsigned long value;
-}
-apuinfo_list;
-
-static apuinfo_list *head;
-
-
-static void
-apuinfo_list_init (void)
-{
- head = NULL;
-}
-
-static void
-apuinfo_list_add (unsigned long value)
-{
- apuinfo_list *entry = head;
-
- while (entry != NULL)
- {
- if (entry->value == value)
- return;
- entry = entry->next;
- }
-
- entry = bfd_malloc (sizeof (* entry));
- if (entry == NULL)
- return;
-
- entry->value = value;
- entry->next = head;
- head = entry;
-}
-
-static unsigned
-apuinfo_list_length (void)
-{
- apuinfo_list *entry;
- unsigned long count;
-
- for (entry = head, count = 0;
- entry;
- entry = entry->next)
- ++ count;
-
- return count;
-}
-
-static inline unsigned long
-apuinfo_list_element (unsigned long number)
-{
- apuinfo_list * entry;
-
- for (entry = head;
- entry && number --;
- entry = entry->next)
- ;
-
- return entry ? entry->value : 0;
-}
-
-static void
-apuinfo_list_finish (void)
-{
- apuinfo_list *entry;
-
- for (entry = head; entry;)
- {
- apuinfo_list *next = entry->next;
- free (entry);
- entry = next;
- }
-
- head = NULL;
-}
-
-#define APUINFO_SECTION_NAME ".PPC.EMB.apuinfo"
-#define APUINFO_LABEL "APUinfo"
-
-/* Scan the input BFDs and create a linked list of
- the APUinfo values that will need to be emitted. */
-
-static void
-ppc_elf_begin_write_processing (bfd *abfd, struct bfd_link_info *link_info)
+ppc_elf_finish_dynamic_symbol (bfd *output_bfd,
+ struct bfd_link_info *info,
+ struct elf_link_hash_entry *h,
+ Elf_Internal_Sym *sym)
{
- bfd *ibfd;
- asection *asec;
- char *buffer;
- unsigned num_input_sections;
- bfd_size_type output_section_size;
- unsigned i;
- unsigned num_entries;
- unsigned long offset;
- unsigned long length;
- const char *error_message = NULL;
-
- if (link_info == NULL)
- return;
-
- /* Scan the input bfds, looking for apuinfo sections. */
- num_input_sections = 0;
- output_section_size = 0;
-
- for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
- {
- asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
- if (asec)
- {
- ++ num_input_sections;
- output_section_size += asec->_raw_size;
- }
- }
-
- /* We need at least one input sections
- in order to make merging worthwhile. */
- if (num_input_sections < 1)
- return;
-
- /* Just make sure that the output section exists as well. */
- asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
- if (asec == NULL)
- return;
-
- /* Allocate a buffer for the contents of the input sections. */
- buffer = bfd_malloc (output_section_size);
- if (buffer == NULL)
- return;
-
- offset = 0;
- apuinfo_list_init ();
-
- /* Read in the input sections contents. */
- for (ibfd = link_info->input_bfds; ibfd; ibfd = ibfd->link_next)
- {
- unsigned long datum;
- char *ptr;
-
- asec = bfd_get_section_by_name (ibfd, APUINFO_SECTION_NAME);
- if (asec == NULL)
- continue;
-
- length = asec->_raw_size;
- if (length < 24)
- {
- error_message = _("corrupt or empty %s section in %s");
- goto fail;
- }
+ struct ppc_elf_link_hash_table *htab;
- if (bfd_seek (ibfd, asec->filepos, SEEK_SET) != 0
- || (bfd_bread (buffer + offset, length, ibfd) != length))
- {
- error_message = _("unable to read in %s section from %s");
- goto fail;
- }
+#ifdef DEBUG
+ fprintf (stderr, "ppc_elf_finish_dynamic_symbol called for %s",
+ h->root.root.string);
+#endif
- /* Process the contents of the section. */
- ptr = buffer + offset;
- error_message = _("corrupt %s section in %s");
+ htab = ppc_elf_hash_table (info);
+ BFD_ASSERT (htab->elf.dynobj != NULL);
- /* Verify the contents of the header. Note - we have to
- extract the values this way in order to allow for a
- host whose endian-ness is different from the target. */
- datum = bfd_get_32 (ibfd, ptr);
- if (datum != sizeof APUINFO_LABEL)
- goto fail;
+ if (h->plt.offset != (bfd_vma) -1)
+ {
+ Elf_Internal_Rela rela;
+ bfd_byte *loc;
+ bfd_vma reloc_index;
- datum = bfd_get_32 (ibfd, ptr + 8);
- if (datum != 0x2)
- goto fail;
+#ifdef DEBUG
+ fprintf (stderr, ", plt_offset = %d", h->plt.offset);
+#endif
- if (strcmp (ptr + 12, APUINFO_LABEL) != 0)
- goto fail;
+ /* This symbol has an entry in the procedure linkage table. Set
+ it up. */
- /* Get the number of bytes used for apuinfo entries. */
- datum = bfd_get_32 (ibfd, ptr + 4);
- if (datum + 20 != length)
- goto fail;
+ BFD_ASSERT (h->dynindx != -1);
+ BFD_ASSERT (htab->plt != NULL && htab->relplt != NULL);
- /* Make sure that we do not run off the end of the section. */
- if (offset + length > output_section_size)
- goto fail;
+ /* We don't need to fill in the .plt. The ppc dynamic linker
+ will fill it in. */
- /* Scan the apuinfo section, building a list of apuinfo numbers. */
- for (i = 0; i < datum; i += 4)
- apuinfo_list_add (bfd_get_32 (ibfd, ptr + 20 + i));
+ /* Fill in the entry in the .rela.plt section. */
+ rela.r_offset = (htab->plt->output_section->vma
+ + htab->plt->output_offset
+ + h->plt.offset);
+ rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_JMP_SLOT);
+ rela.r_addend = 0;
- /* Update the offset. */
- offset += length;
+ reloc_index = (h->plt.offset - PLT_INITIAL_ENTRY_SIZE) / PLT_SLOT_SIZE;
+ if (reloc_index > PLT_NUM_SINGLE_ENTRIES)
+ reloc_index -= (reloc_index - PLT_NUM_SINGLE_ENTRIES) / 2;
+ loc = (htab->relplt->contents
+ + reloc_index * sizeof (Elf32_External_Rela));
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+
+ if (!h->def_regular)
+ {
+ /* Mark the symbol as undefined, rather than as defined in
+ the .plt section. Leave the value alone. */
+ sym->st_shndx = SHN_UNDEF;
+ /* If the symbol is weak, we do need to clear the value.
+ Otherwise, the PLT entry would provide a definition for
+ the symbol even if the symbol wasn't defined anywhere,
+ and so the symbol would never be NULL. */
+ if (!h->ref_regular_nonweak)
+ sym->st_value = 0;
+ }
}
- error_message = NULL;
+ if (h->needs_copy)
+ {
+ asection *s;
+ Elf_Internal_Rela rela;
+ bfd_byte *loc;
- /* Compute the size of the output section. */
- num_entries = apuinfo_list_length ();
- output_section_size = 20 + num_entries * 4;
+ /* This symbols needs a copy reloc. Set it up. */
- asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
+#ifdef DEBUG
+ fprintf (stderr, ", copy");
+#endif
- if (! bfd_set_section_size (abfd, asec, output_section_size))
- ibfd = abfd,
- error_message = _("warning: unable to set size of %s section in %s");
+ BFD_ASSERT (h->dynindx != -1);
- fail:
- free (buffer);
+ if (h->size <= elf_gp_size (htab->elf.dynobj))
+ s = htab->relsbss;
+ else
+ s = htab->relbss;
+ BFD_ASSERT (s != NULL);
- if (error_message)
- (*_bfd_error_handler) (error_message, APUINFO_SECTION_NAME,
- bfd_archive_filename (ibfd));
-}
+ rela.r_offset = (h->root.u.def.value
+ + h->root.u.def.section->output_section->vma
+ + h->root.u.def.section->output_offset);
+ rela.r_info = ELF32_R_INFO (h->dynindx, R_PPC_COPY);
+ rela.r_addend = 0;
+ loc = s->contents + s->reloc_count++ * sizeof (Elf32_External_Rela);
+ bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
+ }
+#ifdef DEBUG
+ fprintf (stderr, "\n");
+#endif
-/* Prevent the output section from accumulating the input sections'
- contents. We have already stored this in our linked list structure. */
+ /* Mark some specially defined symbols as absolute. */
+ if (strcmp (h->root.root.string, "_DYNAMIC") == 0
+ || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
+ || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
+ sym->st_shndx = SHN_ABS;
-static bfd_boolean
-ppc_elf_write_section (bfd *abfd ATTRIBUTE_UNUSED,
- asection *asec,
- bfd_byte *contents ATTRIBUTE_UNUSED)
+ return TRUE;
+}
+\f
+static enum elf_reloc_type_class
+ppc_elf_reloc_type_class (const Elf_Internal_Rela *rela)
{
- return (apuinfo_list_length ()
- && strcmp (asec->name, APUINFO_SECTION_NAME) == 0);
+ switch (ELF32_R_TYPE (rela->r_info))
+ {
+ case R_PPC_RELATIVE:
+ return reloc_class_relative;
+ case R_PPC_REL24:
+ case R_PPC_ADDR24:
+ case R_PPC_JMP_SLOT:
+ return reloc_class_plt;
+ case R_PPC_COPY:
+ return reloc_class_copy;
+ default:
+ return reloc_class_normal;
+ }
}
+\f
+/* Finish up the dynamic sections. */
+static bfd_boolean
+ppc_elf_finish_dynamic_sections (bfd *output_bfd,
+ struct bfd_link_info *info)
+{
+ asection *sdyn;
+ struct ppc_elf_link_hash_table *htab;
-/* Finally we can generate the output section. */
+#ifdef DEBUG
+ fprintf (stderr, "ppc_elf_finish_dynamic_sections called\n");
+#endif
-static void
-ppc_elf_final_write_processing (bfd *abfd, bfd_boolean linker ATTRIBUTE_UNUSED)
-{
- bfd_byte *buffer;
- asection *asec;
- unsigned i;
- unsigned num_entries;
- bfd_size_type length;
+ htab = ppc_elf_hash_table (info);
+ sdyn = bfd_get_section_by_name (htab->elf.dynobj, ".dynamic");
- asec = bfd_get_section_by_name (abfd, APUINFO_SECTION_NAME);
- if (asec == NULL)
- return;
+ if (htab->elf.dynamic_sections_created)
+ {
+ Elf32_External_Dyn *dyncon, *dynconend;
- if (apuinfo_list_length () == 0)
- return;
+ BFD_ASSERT (htab->plt != NULL && sdyn != NULL);
- length = asec->_raw_size;
- if (length < 20)
- return;
+ dyncon = (Elf32_External_Dyn *) sdyn->contents;
+ dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
+ for (; dyncon < dynconend; dyncon++)
+ {
+ Elf_Internal_Dyn dyn;
+ asection *s;
- buffer = bfd_malloc (length);
- if (buffer == NULL)
- {
- (*_bfd_error_handler)
- (_("failed to allocate space for new APUinfo section."));
- return;
- }
+ bfd_elf32_swap_dyn_in (htab->elf.dynobj, dyncon, &dyn);
- /* Create the apuinfo header. */
- num_entries = apuinfo_list_length ();
- bfd_put_32 (abfd, sizeof APUINFO_LABEL, buffer);
- bfd_put_32 (abfd, num_entries * 4, buffer + 4);
- bfd_put_32 (abfd, 0x2, buffer + 8);
- strcpy (buffer + 12, APUINFO_LABEL);
+ switch (dyn.d_tag)
+ {
+ case DT_PLTGOT:
+ s = htab->plt;
+ dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
+ break;
- length = 20;
- for (i = 0; i < num_entries; i++)
- {
- bfd_put_32 (abfd, apuinfo_list_element (i), buffer + length);
- length += 4;
- }
+ case DT_PLTRELSZ:
+ dyn.d_un.d_val = htab->relplt->size;
+ break;
- if (length != asec->_raw_size)
- (*_bfd_error_handler) (_("failed to compute new APUinfo section."));
+ case DT_JMPREL:
+ s = htab->relplt;
+ dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
+ break;
- if (! bfd_set_section_contents (abfd, asec, buffer, (file_ptr) 0, length))
- (*_bfd_error_handler) (_("failed to install new APUinfo section."));
+ default:
+ continue;
+ }
- free (buffer);
+ bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
+ }
+ }
- apuinfo_list_finish ();
-}
+ /* Add a blrl instruction at _GLOBAL_OFFSET_TABLE_-4 so that a function can
+ easily find the address of the _GLOBAL_OFFSET_TABLE_. */
+ if (htab->got)
+ {
+ unsigned char *contents = htab->got->contents;
+ bfd_put_32 (output_bfd, 0x4e800021 /* blrl */, contents);
-/* Add extra PPC sections -- Note, for now, make .sbss2 and
- .PPC.EMB.sbss0 a normal section, and not a bss section so
- that the linker doesn't crater when trying to make more than
- 2 sections. */
+ if (sdyn == NULL)
+ bfd_put_32 (output_bfd, 0, contents + 4);
+ else
+ bfd_put_32 (output_bfd,
+ sdyn->output_section->vma + sdyn->output_offset,
+ contents + 4);
-static struct bfd_elf_special_section const ppc_elf_special_sections[]=
-{
- { ".tags", 5, 0, SHT_ORDERED, SHF_ALLOC },
- { ".sdata", 6, -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
- { ".sbss", 5, -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
- { ".sdata2", 7, -2, SHT_PROGBITS, SHF_ALLOC },
- { ".sbss2", 6, -2, SHT_PROGBITS, SHF_ALLOC },
- { ".PPC.EMB.apuinfo", 16, 0, SHT_NOTE, 0 },
- { ".PPC.EMB.sdata0", 15, 0, SHT_PROGBITS, SHF_ALLOC },
- { ".PPC.EMB.sbss0", 14, 0, SHT_PROGBITS, SHF_ALLOC },
- { ".plt", 4, 0, SHT_NOBITS, SHF_ALLOC + SHF_EXECINSTR },
- { NULL, 0, 0, 0, 0 }
-};
+ elf_section_data (htab->got->output_section)->this_hdr.sh_entsize = 4;
+ }
+
+ return TRUE;
+}
\f
#define TARGET_LITTLE_SYM bfd_elf32_powerpcle_vec
#define TARGET_LITTLE_NAME "elf32-powerpcle"
#else
#define ELF_MAXPAGESIZE 0x10000
#endif
+#define ELF_MINPAGESIZE 0x1000
#define elf_info_to_howto ppc_elf_info_to_howto
#ifdef EM_CYGNUS_POWERPC
#define elf_backend_finish_dynamic_sections ppc_elf_finish_dynamic_sections
#define elf_backend_fake_sections ppc_elf_fake_sections
#define elf_backend_additional_program_headers ppc_elf_additional_program_headers
-#define elf_backend_modify_segment_map ppc_elf_modify_segment_map
#define elf_backend_grok_prstatus ppc_elf_grok_prstatus
#define elf_backend_grok_psinfo ppc_elf_grok_psinfo
#define elf_backend_reloc_type_class ppc_elf_reloc_type_class
#define elf_backend_final_write_processing ppc_elf_final_write_processing
#define elf_backend_write_section ppc_elf_write_section
#define elf_backend_special_sections ppc_elf_special_sections
+#define elf_backend_plt_sym_val ppc_elf_plt_sym_val
#include "elf32-target.h"
projects / binutils.git / blobdiff