/* BFD back-end for Intel 960 COFF files.
- Copyright (C) 1990, 1991, 1992, 1993, 1994 Free Software Foundation, Inc.
+ Copyright (C) 1990, 91, 92, 93, 94, 1995 Free Software Foundation, Inc.
Written by Cygnus Support.
This file is part of BFD, the Binary File Descriptor library.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
-Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#define I960 1
#define BADMAG(x) I960BADMAG(x)
static bfd_reloc_status_type optcall_callback
PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
-
+static bfd_reloc_status_type coff_i960_relocate
+ PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
+static reloc_howto_type *coff_i960_reloc_type_lookup
+ PARAMS ((bfd *, bfd_reloc_code_real_type));
+static boolean coff_i960_start_final_link
+ PARAMS ((bfd *, struct bfd_link_info *));
+static boolean coff_i960_relocate_section
+ PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
+ struct internal_reloc *, struct internal_syment *, asection **));
+static boolean coff_i960_adjust_symndx
+ PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *,
+ struct internal_reloc *, boolean *));
+
+#define COFF_DEFAULT_SECTION_ALIGNMENT_POWER (3)
+
+/* The i960 does not support an MMU, so COFF_PAGE_SIZE can be
+ arbitrarily small. */
+#define COFF_PAGE_SIZE 1
+
#define COFF_LONG_FILENAMES
#define CALLS 0x66003800 /* Template for 'calls' instruction */
static bfd_reloc_status_type
optcall_callback (abfd, reloc_entry, symbol_in, data,
- ignore_input_section, ignore_bfd, error_message)
+ input_section, ignore_bfd, error_message)
bfd *abfd;
arelent *reloc_entry;
asymbol *symbol_in;
PTR data;
- asection *ignore_input_section;
+ asection *input_section;
bfd *ignore_bfd;
char **error_message;
{
bfd_reloc_status_type result;
coff_symbol_type *cs = coffsymbol(symbol_in);
+ /* Don't do anything with symbols which aren't tied up yet,
+ except move the reloc. */
+ if (bfd_is_und_section (cs->symbol.section)) {
+ reloc_entry->address += input_section->output_offset;
+ return bfd_reloc_ok;
+ }
+
/* So the target symbol has to be of coff type, and the symbol
has to have the correct native information within it */
if ((bfd_asymbol_flavour(&cs->symbol) != bfd_target_coff_flavour)
return result;
}
+/* i960 COFF is used by VxWorks 5.1. However, VxWorks 5.1 does not
+ appear to correctly handle a reloc against a symbol defined in the
+ same object file. It appears to simply discard such relocs, rather
+ than adding their values into the object file. We handle this here
+ by converting all relocs against defined symbols into relocs
+ against the section symbol, when generating a relocateable output
+ file.
+
+ Note that this function is only called if we are not using the COFF
+ specific backend linker. It only does something when doing a
+ relocateable link, which will almost certainly fail when not
+ generating COFF i960 output, so this function is actually no longer
+ useful. It was used before this target was converted to use the
+ COFF specific backend linker. */
+
+static bfd_reloc_status_type
+coff_i960_relocate (abfd, reloc_entry, symbol, data, input_section,
+ output_bfd, error_message)
+ bfd *abfd;
+ arelent *reloc_entry;
+ asymbol *symbol;
+ PTR data;
+ asection *input_section;
+ bfd *output_bfd;
+ char **error_message;
+{
+ asection *osec;
+
+ if (output_bfd == NULL)
+ {
+ /* Not generating relocateable output file. */
+ return bfd_reloc_continue;
+ }
+
+ if (bfd_is_und_section (bfd_get_section (symbol)))
+ {
+ /* Symbol is not defined, so no need to worry about it. */
+ return bfd_reloc_continue;
+ }
+
+ if (bfd_is_com_section (bfd_get_section (symbol)))
+ {
+ /* I don't really know what the right action is for a common
+ symbol. */
+ return bfd_reloc_continue;
+ }
+
+ /* Convert the reloc to use the section symbol. FIXME: This method
+ is ridiculous. */
+ osec = bfd_get_section (symbol)->output_section;
+ if (coff_section_data (output_bfd, osec) != NULL
+ && coff_section_data (output_bfd, osec)->tdata != NULL)
+ reloc_entry->sym_ptr_ptr =
+ (asymbol **) coff_section_data (output_bfd, osec)->tdata;
+ else
+ {
+ const char *sec_name;
+ asymbol **syms, **sym_end;
+
+ sec_name = bfd_get_section_name (output_bfd, osec);
+ syms = bfd_get_outsymbols (output_bfd);
+ sym_end = syms + bfd_get_symcount (output_bfd);
+ for (; syms < sym_end; syms++)
+ {
+ if (bfd_asymbol_name (*syms) != NULL
+ && (*syms)->value == 0
+ && strcmp ((*syms)->section->output_section->name,
+ sec_name) == 0)
+ break;
+ }
+
+ if (syms >= sym_end)
+ abort ();
+
+ reloc_entry->sym_ptr_ptr = syms;
+
+ if (coff_section_data (output_bfd, osec) == NULL)
+ {
+ osec->used_by_bfd =
+ ((PTR) bfd_zalloc (abfd,
+ sizeof (struct coff_section_tdata)));
+ if (osec->used_by_bfd == NULL)
+ return bfd_reloc_overflow;
+ }
+ coff_section_data (output_bfd, osec)->tdata = (PTR) syms;
+ }
+
+ /* Let bfd_perform_relocation do its thing, which will include
+ stuffing the symbol addend into the object file. */
+ return bfd_reloc_continue;
+}
+
static reloc_howto_type howto_rellong =
HOWTO ((unsigned int) R_RELLONG, 0, 2, 32,false, 0,
- complain_overflow_bitfield, 0,"rellong", true, 0xffffffff,
- 0xffffffff, 0);
+ complain_overflow_bitfield, coff_i960_relocate,"rellong", true,
+ 0xffffffff, 0xffffffff, 0);
static reloc_howto_type howto_iprmed =
- HOWTO (R_IPRMED, 0, 2, 24,true,0, complain_overflow_signed,0,
- "iprmed ", true, 0x00ffffff, 0x00ffffff, 0);
+ HOWTO (R_IPRMED, 0, 2, 24,true,0, complain_overflow_signed,
+ coff_i960_relocate, "iprmed ", true, 0x00ffffff, 0x00ffffff, 0);
static reloc_howto_type howto_optcall =
HOWTO (R_OPTCALL, 0,2,24,true,0, complain_overflow_signed,
optcall_callback, "optcall", true, 0x00ffffff, 0x00ffffff, 0);
-static const reloc_howto_type *
+static reloc_howto_type *
coff_i960_reloc_type_lookup (abfd, code)
bfd *abfd;
bfd_reloc_code_real_type code;
case 27: howto_ptr = &howto_optcall; break; \
default: howto_ptr = 0; break; \
} \
- cache_ptr->howto = howto_ptr; \
+ (cache_ptr)->howto = howto_ptr; \
}
-#include "coffcode.h"
+/* i960 COFF is used by VxWorks 5.1. However, VxWorks 5.1 does not
+ appear to correctly handle a reloc against a symbol defined in the
+ same object file. It appears to simply discard such relocs, rather
+ than adding their values into the object file. We handle this by
+ converting all relocs against global symbols into relocs against
+ internal symbols at the start of the section. This routine is
+ called at the start of the linking process, and it creates the
+ necessary symbols. */
+
+static boolean
+coff_i960_start_final_link (abfd, info)
+ bfd *abfd;
+ struct bfd_link_info *info;
+{
+ bfd_size_type symesz = bfd_coff_symesz (abfd);
+ asection *o;
+ bfd_byte *esym;
+
+ if (! info->relocateable)
+ return true;
+
+ esym = (bfd_byte *) bfd_malloc (symesz);
+ if (esym == NULL)
+ return false;
+
+ if (bfd_seek (abfd, obj_sym_filepos (abfd), SEEK_SET) != 0)
+ return false;
+
+ for (o = abfd->sections; o != NULL; o = o->next)
+ {
+ struct internal_syment isym;
+
+ strncpy (isym._n._n_name, o->name, SYMNMLEN);
+ isym.n_value = 0;
+ isym.n_scnum = o->target_index;
+ isym.n_type = T_NULL;
+ isym.n_sclass = C_STAT;
+ isym.n_numaux = 0;
+
+ bfd_coff_swap_sym_out (abfd, (PTR) &isym, (PTR) esym);
+
+ if (bfd_write (esym, symesz, 1, abfd) != symesz)
+ {
+ free (esym);
+ return false;
+ }
+
+ obj_raw_syment_count (abfd) += 1;
+ }
+
+ free (esym);
+
+ return true;
+}
+
+/* The reloc processing routine for the optimized COFF linker. */
+
+static boolean
+coff_i960_relocate_section (output_bfd, info, input_bfd, input_section,
+ contents, relocs, syms, sections)
+ bfd *output_bfd;
+ struct bfd_link_info *info;
+ bfd *input_bfd;
+ asection *input_section;
+ bfd_byte *contents;
+ struct internal_reloc *relocs;
+ struct internal_syment *syms;
+ asection **sections;
+{
+ struct internal_reloc *rel;
+ struct internal_reloc *relend;
+
+ rel = relocs;
+ relend = rel + input_section->reloc_count;
+ for (; rel < relend; rel++)
+ {
+ long symndx;
+ struct coff_link_hash_entry *h;
+ struct internal_syment *sym;
+ bfd_vma addend;
+ bfd_vma val;
+ reloc_howto_type *howto;
+ bfd_reloc_status_type rstat = bfd_reloc_ok;
+ boolean done;
+
+ symndx = rel->r_symndx;
+
+ if (symndx == -1)
+ {
+ h = NULL;
+ sym = NULL;
+ }
+ else
+ {
+ h = obj_coff_sym_hashes (input_bfd)[symndx];
+ sym = syms + symndx;
+ }
+
+ if (sym != NULL && sym->n_scnum != 0)
+ addend = - sym->n_value;
+ else
+ addend = 0;
+
+ switch (rel->r_type)
+ {
+ case 17: howto = &howto_rellong; break;
+ case 25: howto = &howto_iprmed; break;
+ case 27: howto = &howto_optcall; break;
+ default:
+ bfd_set_error (bfd_error_bad_value);
+ return false;
+ }
+
+ val = 0;
+
+ if (h == NULL)
+ {
+ asection *sec;
+
+ if (symndx == -1)
+ {
+ sec = bfd_abs_section_ptr;
+ val = 0;
+ }
+ else
+ {
+ sec = sections[symndx];
+ val = (sec->output_section->vma
+ + sec->output_offset
+ + sym->n_value
+ - sec->vma);
+ }
+ }
+ else
+ {
+ if (h->root.type == bfd_link_hash_defined
+ || h->root.type == bfd_link_hash_defweak)
+ {
+ asection *sec;
+
+ sec = h->root.u.def.section;
+ val = (h->root.u.def.value
+ + sec->output_section->vma
+ + sec->output_offset);
+ }
+ else if (! info->relocateable)
+ {
+ if (! ((*info->callbacks->undefined_symbol)
+ (info, h->root.root.string, input_bfd, input_section,
+ rel->r_vaddr - input_section->vma)))
+ return false;
+ }
+ }
+
+ done = false;
+
+ if (howto->type == R_OPTCALL && ! info->relocateable && symndx != -1)
+ {
+ int class;
+
+ if (h != NULL)
+ class = h->class;
+ else
+ class = sym->n_sclass;
+
+ switch (class)
+ {
+ case C_NULL:
+ /* This symbol is apparently not from a COFF input file.
+ We warn, and then assume that it is not a leaf
+ function. */
+ if (! ((*info->callbacks->reloc_dangerous)
+ (info,
+ "uncertain calling convention for non-COFF symbol",
+ input_bfd, input_section,
+ rel->r_vaddr - input_section->vma)))
+ return false;
+ break;
+ case C_LEAFSTAT:
+ case C_LEAFEXT:
+ /* This is a call to a leaf procedure; use the bal
+ instruction. */
+ {
+ long olf;
+ unsigned long word;
+
+ if (h != NULL)
+ {
+ BFD_ASSERT (h->numaux == 2);
+ olf = h->aux[1].x_bal.x_balntry;
+ }
+ else
+ {
+ bfd_byte *esyms;
+ union internal_auxent aux;
+
+ BFD_ASSERT (sym->n_numaux == 2);
+ esyms = (bfd_byte *) obj_coff_external_syms (input_bfd);
+ esyms += (symndx + 2) * bfd_coff_symesz (input_bfd);
+ bfd_coff_swap_aux_in (input_bfd, (PTR) esyms, sym->n_type,
+ sym->n_sclass, 1, sym->n_numaux,
+ (PTR) &aux);
+ olf = aux.x_bal.x_balntry;
+ }
+
+ word = bfd_get_32 (input_bfd,
+ (contents
+ + (rel->r_vaddr - input_section->vma)));
+ word = ((word + olf - val) & BAL_MASK) | BAL;
+ bfd_put_32 (input_bfd,
+ word,
+ (contents
+ + (rel->r_vaddr - input_section->vma)));
+ done = true;
+ }
+ break;
+ case C_SCALL:
+ BFD_ASSERT (0);
+ break;
+ }
+ }
+
+ if (! done)
+ rstat = _bfd_final_link_relocate (howto, input_bfd, input_section,
+ contents,
+ rel->r_vaddr - input_section->vma,
+ val, addend);
+
+ switch (rstat)
+ {
+ default:
+ abort ();
+ case bfd_reloc_ok:
+ break;
+ case bfd_reloc_overflow:
+ {
+ const char *name;
+ char buf[SYMNMLEN + 1];
+
+ if (symndx == -1)
+ name = "*ABS*";
+ else if (h != NULL)
+ name = h->root.root.string;
+ else
+ {
+ name = _bfd_coff_internal_syment_name (input_bfd, sym, buf);
+ if (name == NULL)
+ return false;
+ }
+
+ if (! ((*info->callbacks->reloc_overflow)
+ (info, name, howto->name, (bfd_vma) 0, input_bfd,
+ input_section, rel->r_vaddr - input_section->vma)))
+ return false;
+ }
+ }
+ }
+
+ return true;
+}
+
+/* Adjust the symbol index of any reloc against a global symbol to
+ instead be a reloc against the internal symbol we created specially
+ for the section. */
+
+/*ARGSUSED*/
+static boolean
+coff_i960_adjust_symndx (obfd, info, ibfd, sec, irel, adjustedp)
+ bfd *obfd;
+ struct bfd_link_info *info;
+ bfd *ibfd;
+ asection *sec;
+ struct internal_reloc *irel;
+ boolean *adjustedp;
+{
+ struct coff_link_hash_entry *h;
+
+ *adjustedp = false;
+
+ h = obj_coff_sym_hashes (ibfd)[irel->r_symndx];
+ if (h == NULL
+ || (h->root.type != bfd_link_hash_defined
+ && h->root.type != bfd_link_hash_defweak))
+ return true;
+
+ irel->r_symndx = h->root.u.def.section->output_section->target_index - 1;
+ *adjustedp = true;
+
+ return true;
+}
+
+#define coff_start_final_link coff_i960_start_final_link
+
+#define coff_relocate_section coff_i960_relocate_section
+
+#define coff_adjust_symndx coff_i960_adjust_symndx
-#undef coff_bfd_reloc_type_lookup
#define coff_bfd_reloc_type_lookup coff_i960_reloc_type_lookup
+#include "coffcode.h"
+
const bfd_target icoff_little_vec =
{
"coff-Intel-little", /* name */
'/', /* ar_pad_char */
15, /* ar_max_namelen */
- 3, /* minimum alignment power */
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
'/', /* ar_pad_char */
15, /* ar_max_namelen */
- 3, /* minimum alignment power */
bfd_getl64, bfd_getl_signed_64, bfd_putl64,
bfd_getl32, bfd_getl_signed_32, bfd_putl32,
bfd_getl16, bfd_getl_signed_16, bfd_putl16, /* data */
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