/* ELF object file format
- Copyright (C) 1992, 93-98, 1999 Free Software Foundation, Inc.
+ Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000,
+ 2001, 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler.
You should have received a copy of the GNU General Public License
along with GAS; see the file COPYING. If not, write to the Free
- Software Foundation, 59 Temple Place - Suite 330, Boston, MA
- 02111-1307, USA. */
+ Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
+ 02110-1301, USA. */
#define OBJ_HEADER "obj-elf.h"
#include "as.h"
+#include "safe-ctype.h"
#include "subsegs.h"
#include "obstack.h"
+#include "struc-symbol.h"
+#include "dwarf2dbg.h"
#ifndef ECOFF_DEBUGGING
#define ECOFF_DEBUGGING 0
#include "elf/ppc.h"
#endif
-static bfd_vma elf_s_get_size PARAMS ((symbolS *));
-static void elf_s_set_size PARAMS ((symbolS *, bfd_vma));
-static bfd_vma elf_s_get_align PARAMS ((symbolS *));
-static void elf_s_set_align PARAMS ((symbolS *, bfd_vma));
-static void elf_copy_symbol_attributes PARAMS ((symbolS *, symbolS *));
-static int elf_sec_sym_ok_for_reloc PARAMS ((asection *));
-static void adjust_stab_sections PARAMS ((bfd *, asection *, PTR));
+#ifdef TC_I370
+#include "elf/i370.h"
+#endif
-#ifdef NEED_ECOFF_DEBUG
-static boolean elf_get_extr PARAMS ((asymbol *, EXTR *));
-static void elf_set_index PARAMS ((asymbol *, bfd_size_type));
+#ifdef TC_I386
+#include "elf/x86-64.h"
#endif
-static void obj_elf_line PARAMS ((int));
-void obj_elf_version PARAMS ((int));
-static void obj_elf_size PARAMS ((int));
-static void obj_elf_type PARAMS ((int));
-static void obj_elf_ident PARAMS ((int));
-static void obj_elf_weak PARAMS ((int));
-static void obj_elf_local PARAMS ((int));
-static void obj_elf_symver PARAMS ((int));
-static void obj_elf_vtable_inherit PARAMS ((int));
-static void obj_elf_vtable_entry PARAMS ((int));
-static void obj_elf_subsection PARAMS ((int));
-static void obj_elf_popsection PARAMS ((int));
+static void obj_elf_line (int);
+static void obj_elf_size (int);
+static void obj_elf_type (int);
+static void obj_elf_ident (int);
+static void obj_elf_weak (int);
+static void obj_elf_local (int);
+static void obj_elf_visibility (int);
+static void obj_elf_symver (int);
+static void obj_elf_subsection (int);
+static void obj_elf_popsection (int);
+static void obj_elf_tls_common (int);
+static void obj_elf_lcomm (int);
+static void obj_elf_struct (int);
static const pseudo_typeS elf_pseudo_table[] =
{
{"comm", obj_elf_common, 0},
{"common", obj_elf_common, 1},
{"ident", obj_elf_ident, 0},
+ {"lcomm", obj_elf_lcomm, 0},
{"local", obj_elf_local, 0},
{"previous", obj_elf_previous, 0},
{"section", obj_elf_section, 0},
{"version", obj_elf_version, 0},
{"weak", obj_elf_weak, 0},
+ /* These define symbol visibility. */
+ {"internal", obj_elf_visibility, STV_INTERNAL},
+ {"hidden", obj_elf_visibility, STV_HIDDEN},
+ {"protected", obj_elf_visibility, STV_PROTECTED},
+
/* These are used for stabs-in-elf configurations. */
{"line", obj_elf_line, 0},
{"subsection", obj_elf_subsection, 0},
/* These are GNU extensions to aid in garbage collecting C++ vtables. */
- {"vtable_inherit", obj_elf_vtable_inherit, 0},
- {"vtable_entry", obj_elf_vtable_entry, 0},
+ {"vtable_inherit", (void (*) (int)) &obj_elf_vtable_inherit, 0},
+ {"vtable_entry", (void (*) (int)) &obj_elf_vtable_entry, 0},
- /* These are used for dwarf. */
+ /* These are used for dwarf. */
{"2byte", cons, 2},
{"4byte", cons, 4},
{"8byte", cons, 8},
+ /* These are used for dwarf2. */
+ { "file", (void (*) (int)) dwarf2_directive_file, 0 },
+ { "loc", dwarf2_directive_loc, 0 },
+ { "loc_mark_labels", dwarf2_directive_loc_mark_labels, 0 },
/* We need to trap the section changing calls to handle .previous. */
{"data", obj_elf_data, 0},
+ {"offset", obj_elf_struct, 0},
+ {"struct", obj_elf_struct, 0},
{"text", obj_elf_text, 0},
+ {"tls_common", obj_elf_tls_common, 0},
+
/* End sentinel. */
{NULL, NULL, 0},
};
/* This is called when the assembler starts. */
+asection *elf_com_section_ptr;
+
void
-elf_begin ()
+elf_begin (void)
{
+ asection *s;
+
/* Add symbols for the known sections to the symbol table. */
- symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput,
- TEXT_SECTION_NAME)));
- symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput,
- DATA_SECTION_NAME)));
- symbol_table_insert (section_symbol (bfd_get_section_by_name (stdoutput,
- BSS_SECTION_NAME)));
+ s = bfd_get_section_by_name (stdoutput, TEXT_SECTION_NAME);
+ symbol_table_insert (section_symbol (s));
+ s = bfd_get_section_by_name (stdoutput, DATA_SECTION_NAME);
+ symbol_table_insert (section_symbol (s));
+ s = bfd_get_section_by_name (stdoutput, BSS_SECTION_NAME);
+ symbol_table_insert (section_symbol (s));
+ elf_com_section_ptr = bfd_com_section_ptr;
}
void
-elf_pop_insert ()
+elf_pop_insert (void)
{
pop_insert (elf_pseudo_table);
if (ECOFF_DEBUGGING)
}
static bfd_vma
-elf_s_get_size (sym)
- symbolS *sym;
+elf_s_get_size (symbolS *sym)
{
return S_GET_SIZE (sym);
}
static void
-elf_s_set_size (sym, sz)
- symbolS *sym;
- bfd_vma sz;
+elf_s_set_size (symbolS *sym, bfd_vma sz)
{
S_SET_SIZE (sym, sz);
}
static bfd_vma
-elf_s_get_align (sym)
- symbolS *sym;
+elf_s_get_align (symbolS *sym)
{
return S_GET_ALIGN (sym);
}
static void
-elf_s_set_align (sym, align)
- symbolS *sym;
- bfd_vma align;
+elf_s_set_align (symbolS *sym, bfd_vma align)
{
S_SET_ALIGN (sym, align);
}
+int
+elf_s_get_other (symbolS *sym)
+{
+ return elf_symbol (symbol_get_bfdsym (sym))->internal_elf_sym.st_other;
+}
+
static void
-elf_copy_symbol_attributes (dest, src)
- symbolS *dest, *src;
+elf_s_set_other (symbolS *sym, int other)
{
- OBJ_COPY_SYMBOL_ATTRIBUTES (dest, src);
+ S_SET_OTHER (sym, other);
}
static int
-elf_sec_sym_ok_for_reloc (sec)
- asection *sec;
+elf_sec_sym_ok_for_reloc (asection *sec)
{
return obj_sec_sym_ok_for_reloc (sec);
}
void
-elf_file_symbol (s)
- char *s;
+elf_file_symbol (const char *s, int appfile)
{
- symbolS *sym;
+ if (!appfile
+ || symbol_rootP == NULL
+ || symbol_rootP->bsym == NULL
+ || (symbol_rootP->bsym->flags & BSF_FILE) == 0)
+ {
+ symbolS *sym;
- sym = symbol_new (s, absolute_section, (valueT) 0, (struct frag *) 0);
- symbol_set_frag (sym, &zero_address_frag);
- symbol_get_bfdsym (sym)->flags |= BSF_FILE;
+ sym = symbol_new (s, absolute_section, 0, NULL);
+ symbol_set_frag (sym, &zero_address_frag);
+ symbol_get_bfdsym (sym)->flags |= BSF_FILE;
- if (symbol_rootP != sym)
- {
- symbol_remove (sym, &symbol_rootP, &symbol_lastP);
- symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP);
+ if (symbol_rootP != sym)
+ {
+ symbol_remove (sym, &symbol_rootP, &symbol_lastP);
+ symbol_insert (sym, symbol_rootP, &symbol_rootP, &symbol_lastP);
#ifdef DEBUG
- verify_symbol_chain (symbol_rootP, symbol_lastP);
+ verify_symbol_chain (symbol_rootP, symbol_lastP);
#endif
+ }
}
#ifdef NEED_ECOFF_DEBUG
- ecoff_new_file (s);
+ ecoff_new_file (s, appfile);
#endif
}
-void
-obj_elf_common (is_common)
- int is_common;
+/* Called from read.c:s_comm after we've parsed .comm symbol, size.
+ Parse a possible alignment value. */
+
+symbolS *
+elf_common_parse (int ignore ATTRIBUTE_UNUSED, symbolS *symbolP, addressT size)
{
- char *name;
- char c;
- char *p;
- int temp, size;
- symbolS *symbolP;
- int have_align;
+ addressT align = 0;
+ int is_local = symbol_get_obj (symbolP)->local;
- if (flag_mri && is_common)
+ if (*input_line_pointer == ',')
{
- s_mri_common (0);
- return;
- }
+ char *save = input_line_pointer;
- name = input_line_pointer;
- c = get_symbol_end ();
- /* just after name is now '\0' */
- p = input_line_pointer;
- *p = c;
- SKIP_WHITESPACE ();
- if (*input_line_pointer != ',')
- {
- as_bad (_("Expected comma after symbol-name"));
- ignore_rest_of_line ();
- return;
- }
- input_line_pointer++; /* skip ',' */
- if ((temp = get_absolute_expression ()) < 0)
- {
- as_bad (_(".COMMon length (%d.) <0! Ignored."), temp);
- ignore_rest_of_line ();
- return;
- }
- size = temp;
- *p = 0;
- symbolP = symbol_find_or_make (name);
- *p = c;
- if (S_IS_DEFINED (symbolP) && ! S_IS_COMMON (symbolP))
- {
- as_bad (_("Ignoring attempt to re-define symbol"));
- ignore_rest_of_line ();
- return;
- }
- if (S_GET_VALUE (symbolP) != 0)
- {
- if (S_GET_VALUE (symbolP) != (valueT) size)
- {
- as_warn (_("Length of .comm \"%s\" is already %ld. Not changed to %d."),
- S_GET_NAME (symbolP), (long) S_GET_VALUE (symbolP), size);
- }
- }
- know (symbolP->sy_frag == &zero_address_frag);
- if (*input_line_pointer != ',')
- have_align = 0;
- else
- {
- have_align = 1;
input_line_pointer++;
SKIP_WHITESPACE ();
- }
- if (! have_align || *input_line_pointer != '"')
- {
- if (! have_align)
- temp = 0;
- else
- {
- temp = get_absolute_expression ();
- if (temp < 0)
- {
- temp = 0;
- as_warn (_("Common alignment negative; 0 assumed"));
- }
- }
- if (symbol_get_obj (symbolP)->local)
+
+ if (*input_line_pointer == '"')
{
- segT old_sec;
- int old_subsec;
- char *pfrag;
- int align;
-
- /* allocate_bss: */
- old_sec = now_seg;
- old_subsec = now_subseg;
- if (temp)
+ /* For sparc. Accept .common symbol, length, "bss" */
+ input_line_pointer++;
+ /* Some use the dot, some don't. */
+ if (*input_line_pointer == '.')
+ input_line_pointer++;
+ /* Some say data, some say bss. */
+ if (strncmp (input_line_pointer, "bss\"", 4) == 0)
+ input_line_pointer += 4;
+ else if (strncmp (input_line_pointer, "data\"", 5) == 0)
+ input_line_pointer += 5;
+ else
{
- /* convert to a power of 2 alignment */
- for (align = 0; (temp & 1) == 0; temp >>= 1, ++align);
- if (temp != 1)
- {
- as_bad (_("Common alignment not a power of 2"));
- ignore_rest_of_line ();
- return;
- }
+ char *p = input_line_pointer;
+ char c;
+
+ while (*--p != '"')
+ ;
+ while (!is_end_of_line[(unsigned char) *input_line_pointer])
+ if (*input_line_pointer++ == '"')
+ break;
+ c = *input_line_pointer;
+ *input_line_pointer = '\0';
+ as_bad (_("bad .common segment %s"), p);
+ *input_line_pointer = c;
+ ignore_rest_of_line ();
+ return NULL;
}
- else
- align = 0;
- record_alignment (bss_section, align);
- subseg_set (bss_section, 0);
- if (align)
- frag_align (align, 0, 0);
- if (S_GET_SEGMENT (symbolP) == bss_section)
- symbol_get_frag (symbolP)->fr_symbol = 0;
- symbol_set_frag (symbolP, frag_now);
- pfrag = frag_var (rs_org, 1, 1, (relax_substateT) 0, symbolP,
- (offsetT) size, (char *) 0);
- *pfrag = 0;
- S_SET_SIZE (symbolP, size);
- S_SET_SEGMENT (symbolP, bss_section);
- S_CLEAR_EXTERNAL (symbolP);
- subseg_set (old_sec, old_subsec);
+ /* ??? Don't ask me why these are always global. */
+ is_local = 0;
}
else
{
- allocate_common:
- S_SET_VALUE (symbolP, (valueT) size);
- S_SET_ALIGN (symbolP, temp);
- S_SET_EXTERNAL (symbolP);
- S_SET_SEGMENT (symbolP, bfd_com_section_ptr);
+ input_line_pointer = save;
+ align = parse_align (is_local);
+ if (align == (addressT) -1)
+ return NULL;
}
}
+
+ if (is_local)
+ {
+ bss_alloc (symbolP, size, align);
+ S_CLEAR_EXTERNAL (symbolP);
+ }
else
{
- input_line_pointer++;
- /* @@ Some use the dot, some don't. Can we get some consistency?? */
- if (*input_line_pointer == '.')
- input_line_pointer++;
- /* @@ Some say data, some say bss. */
- if (strncmp (input_line_pointer, "bss\"", 4)
- && strncmp (input_line_pointer, "data\"", 5))
- {
- while (*--input_line_pointer != '"')
- ;
- input_line_pointer--;
- goto bad_common_segment;
- }
- while (*input_line_pointer++ != '"')
- ;
- goto allocate_common;
+ S_SET_VALUE (symbolP, size);
+ S_SET_ALIGN (symbolP, align);
+ S_SET_EXTERNAL (symbolP);
+ S_SET_SEGMENT (symbolP, elf_com_section_ptr);
}
symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;
- demand_empty_rest_of_line ();
- return;
+ return symbolP;
+}
- {
- bad_common_segment:
- p = input_line_pointer;
- while (*p && *p != '\n')
- p++;
- c = *p;
- *p = '\0';
- as_bad (_("bad .common segment %s"), input_line_pointer + 1);
- *p = c;
- input_line_pointer = p;
- ignore_rest_of_line ();
- return;
- }
+void
+obj_elf_common (int is_common)
+{
+ if (flag_mri && is_common)
+ s_mri_common (0);
+ else
+ s_comm_internal (0, elf_common_parse);
+}
+
+static void
+obj_elf_tls_common (int ignore ATTRIBUTE_UNUSED)
+{
+ symbolS *symbolP = s_comm_internal (0, elf_common_parse);
+
+ if (symbolP)
+ symbol_get_bfdsym (symbolP)->flags |= BSF_THREAD_LOCAL;
+}
+
+static void
+obj_elf_lcomm (int ignore ATTRIBUTE_UNUSED)
+{
+ symbolS *symbolP = s_comm_internal (0, s_lcomm_internal);
+
+ if (symbolP)
+ symbol_get_bfdsym (symbolP)->flags |= BSF_OBJECT;
}
static void
-obj_elf_local (ignore)
- int ignore ATTRIBUTE_UNUSED;
+obj_elf_local (int ignore ATTRIBUTE_UNUSED)
{
char *name;
int c;
}
static void
-obj_elf_weak (ignore)
- int ignore ATTRIBUTE_UNUSED;
+obj_elf_weak (int ignore ATTRIBUTE_UNUSED)
{
char *name;
int c;
demand_empty_rest_of_line ();
}
+static void
+obj_elf_visibility (int visibility)
+{
+ char *name;
+ int c;
+ symbolS *symbolP;
+ asymbol *bfdsym;
+ elf_symbol_type *elfsym;
+
+ do
+ {
+ name = input_line_pointer;
+ c = get_symbol_end ();
+ symbolP = symbol_find_or_make (name);
+ *input_line_pointer = c;
+
+ SKIP_WHITESPACE ();
+
+ bfdsym = symbol_get_bfdsym (symbolP);
+ elfsym = elf_symbol_from (bfd_asymbol_bfd (bfdsym), bfdsym);
+
+ assert (elfsym);
+
+ elfsym->internal_elf_sym.st_other &= ~3;
+ elfsym->internal_elf_sym.st_other |= visibility;
+
+ if (c == ',')
+ {
+ input_line_pointer ++;
+
+ SKIP_WHITESPACE ();
+
+ if (*input_line_pointer == '\n')
+ c = '\n';
+ }
+ }
+ while (c == ',');
+
+ demand_empty_rest_of_line ();
+}
+
static segT previous_section;
static int previous_subsection;
static struct section_stack *section_stack;
+static bfd_boolean
+get_section (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf)
+{
+ const char *gname = inf;
+ const char *group_name = elf_group_name (sec);
+
+ return (group_name == gname
+ || (group_name != NULL
+ && gname != NULL
+ && strcmp (group_name, gname) == 0));
+}
/* Handle the .section pseudo-op. This code supports two different
syntaxes.
other possibilities, but I don't know what they are. In any case,
BFD doesn't really let us set the section type. */
-/* Certain named sections have particular defined types, listed on p.
- 4-19 of the ABI. */
-struct special_section
-{
- const char *name;
- int type;
- int attributes;
-};
-
-static struct special_section const special_sections[] =
-{
- { ".bss", SHT_NOBITS, SHF_ALLOC + SHF_WRITE },
- { ".comment", SHT_PROGBITS, 0 },
- { ".data", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
- { ".data1", SHT_PROGBITS, SHF_ALLOC + SHF_WRITE },
- { ".debug", SHT_PROGBITS, 0 },
- { ".fini", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
- { ".init", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
- { ".line", SHT_PROGBITS, 0 },
- { ".note", SHT_NOTE, 0 },
- { ".rodata", SHT_PROGBITS, SHF_ALLOC },
- { ".rodata1", SHT_PROGBITS, SHF_ALLOC },
- { ".text", SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR },
-
-#ifdef ELF_TC_SPECIAL_SECTIONS
- ELF_TC_SPECIAL_SECTIONS
-#endif
-
-#if 0
- /* The following section names are special, but they can not
- reasonably appear in assembler code. Some of the attributes are
- processor dependent. */
- { ".dynamic", SHT_DYNAMIC, SHF_ALLOC /* + SHF_WRITE */ },
- { ".dynstr", SHT_STRTAB, SHF_ALLOC },
- { ".dynsym", SHT_DYNSYM, SHF_ALLOC },
- { ".got", SHT_PROGBITS, 0 },
- { ".hash", SHT_HASH, SHF_ALLOC },
- { ".interp", SHT_PROGBITS, /* SHF_ALLOC */ },
- { ".plt", SHT_PROGBITS, 0 },
- { ".shstrtab",SHT_STRTAB, 0 },
- { ".strtab", SHT_STRTAB, /* SHF_ALLOC */ },
- { ".symtab", SHT_SYMTAB, /* SHF_ALLOC */ },
-#endif
-
- { NULL, 0, 0 }
-};
-
void
-obj_elf_change_section (name, type, attr, push)
- char *name;
- int type, attr, push;
+obj_elf_change_section (const char *name,
+ int type,
+ int attr,
+ int entsize,
+ const char *group_name,
+ int linkonce,
+ int push)
{
- int new_sec;
+ asection *old_sec;
segT sec;
+ flagword flags;
+ const struct elf_backend_data *bed;
+ const struct bfd_elf_special_section *ssect;
#ifdef md_flush_pending_output
md_flush_pending_output ();
previous_section = now_seg;
previous_subsection = now_subseg;
- new_sec = bfd_get_section_by_name (stdoutput, name) == NULL;
- sec = subseg_new (name, 0);
+ old_sec = bfd_get_section_by_name_if (stdoutput, name, get_section,
+ (void *) group_name);
+ if (old_sec)
+ {
+ sec = old_sec;
+ subseg_set (sec, 0);
+ }
+ else
+ sec = subseg_force_new (name, 0);
+
+ bed = get_elf_backend_data (stdoutput);
+ ssect = (*bed->get_sec_type_attr) (stdoutput, sec);
- if (new_sec)
+ if (ssect != NULL)
{
- flagword flags;
- symbolS *secsym;
- int i;
-
- /* See if this is one of the special sections. */
- for (i = 0; special_sections[i].name != NULL; i++)
- if (strcmp (name, special_sections[i].name) == 0)
- {
- if (type == SHT_NULL)
- type = special_sections[i].type;
- else if (type != special_sections[i].type)
- as_warn (_("Setting incorrect section type for %s"), name);
-
- if ((attr &~ special_sections[i].attributes) != 0)
- {
- /* As a GNU extension, we permit a .note section to be
- allocatable. If the linker sees an allocateable .note
- section, it will create a PT_NOTE segment in the output
- file. */
- if (strcmp (name, ".note") != 0
- || attr != SHF_ALLOC)
- as_warn (_("Setting incorrect section attributes for %s"),
- name);
- }
- attr |= special_sections[i].attributes;
- break;
- }
+ bfd_boolean override = FALSE;
+
+ if (type == SHT_NULL)
+ type = ssect->type;
+ else if (type != ssect->type)
+ {
+ if (old_sec == NULL
+ /* FIXME: gcc, as of 2002-10-22, will emit
+
+ .section .init_array,"aw",@progbits
+
+ for __attribute__ ((section (".init_array"))).
+ "@progbits" is incorrect. Also for x86-64 large bss
+ sections, gcc, as of 2005-07-06, will emit
+
+ .section .lbss,"aw",@progbits
- /* Convert ELF type and flags to BFD flags. */
- flags = (SEC_RELOC
- | ((attr & SHF_WRITE) ? 0 : SEC_READONLY)
- | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0)
- | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0)
- | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0));
+ "@progbits" is incorrect. */
+#ifdef TC_I386
+ && (bed->s->arch_size != 64
+ || !(ssect->attr & SHF_X86_64_LARGE))
+#endif
+ && ssect->type != SHT_INIT_ARRAY
+ && ssect->type != SHT_FINI_ARRAY
+ && ssect->type != SHT_PREINIT_ARRAY)
+ {
+ /* We allow to specify any type for a .note section. */
+ if (ssect->type != SHT_NOTE)
+ as_warn (_("setting incorrect section type for %s"),
+ name);
+ }
+ else
+ {
+ as_warn (_("ignoring incorrect section type for %s"),
+ name);
+ type = ssect->type;
+ }
+ }
+
+ if (old_sec == NULL && (attr & ~ssect->attr) != 0)
+ {
+ /* As a GNU extension, we permit a .note section to be
+ allocatable. If the linker sees an allocatable .note
+ section, it will create a PT_NOTE segment in the output
+ file. We also allow "x" for .note.GNU-stack. */
+ if (ssect->type == SHT_NOTE
+ && (attr == SHF_ALLOC || attr == SHF_EXECINSTR))
+ ;
+ /* Allow different SHF_MERGE and SHF_STRINGS if we have
+ something like .rodata.str. */
+ else if (ssect->suffix_length == -2
+ && name[ssect->prefix_length] == '.'
+ && (attr
+ & ~ssect->attr
+ & ~SHF_MERGE
+ & ~SHF_STRINGS) == 0)
+ ;
+ /* .interp, .strtab and .symtab can have SHF_ALLOC. */
+ else if (attr == SHF_ALLOC
+ && (strcmp (name, ".interp") == 0
+ || strcmp (name, ".strtab") == 0
+ || strcmp (name, ".symtab") == 0))
+ override = TRUE;
+ /* .note.GNU-stack can have SHF_EXECINSTR. */
+ else if (attr == SHF_EXECINSTR
+ && strcmp (name, ".note.GNU-stack") == 0)
+ override = TRUE;
+#ifdef TC_ALPHA
+ /* A section on Alpha may have SHF_ALPHA_GPREL. */
+ else if ((attr & ~ssect->attr) == SHF_ALPHA_GPREL)
+ override = TRUE;
+#endif
+ else
+ {
+ if (group_name == NULL)
+ as_warn (_("setting incorrect section attributes for %s"),
+ name);
+ override = TRUE;
+ }
+ }
+ if (!override && old_sec == NULL)
+ attr |= ssect->attr;
+ }
+
+ /* Convert ELF type and flags to BFD flags. */
+ flags = (SEC_RELOC
+ | ((attr & SHF_WRITE) ? 0 : SEC_READONLY)
+ | ((attr & SHF_ALLOC) ? SEC_ALLOC : 0)
+ | (((attr & SHF_ALLOC) && type != SHT_NOBITS) ? SEC_LOAD : 0)
+ | ((attr & SHF_EXECINSTR) ? SEC_CODE : 0)
+ | ((attr & SHF_MERGE) ? SEC_MERGE : 0)
+ | ((attr & SHF_STRINGS) ? SEC_STRINGS : 0)
+ | ((attr & SHF_TLS) ? SEC_THREAD_LOCAL : 0));
#ifdef md_elf_section_flags
- flags = md_elf_section_flags (flags, attr, type);
+ flags = md_elf_section_flags (flags, attr, type);
#endif
+ if (linkonce)
+ flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
+
+ if (old_sec == NULL)
+ {
+ symbolS *secsym;
+
+ elf_section_type (sec) = type;
+ elf_section_flags (sec) = attr;
+
/* Prevent SEC_HAS_CONTENTS from being inadvertently set. */
if (type == SHT_NOBITS)
- seg_info (sec)->bss = 1;
+ seg_info (sec)->bss = 1;
bfd_set_section_flags (stdoutput, sec, flags);
+ if (flags & SEC_MERGE)
+ sec->entsize = entsize;
+ elf_group_name (sec) = group_name;
/* Add a symbol for this section to the symbol table. */
secsym = symbol_find (name);
if (secsym != NULL)
symbol_set_bfdsym (secsym, sec->symbol);
else
- symbol_table_insert (section_symbol (sec));
+ symbol_table_insert (section_symbol (sec));
+ }
+ else
+ {
+ if (type != SHT_NULL
+ && (unsigned) type != elf_section_type (old_sec))
+ as_warn (_("ignoring changed section type for %s"), name);
+
+ if (attr != 0)
+ {
+ /* If section attributes are specified the second time we see a
+ particular section, then check that they are the same as we
+ saw the first time. */
+ if (((old_sec->flags ^ flags)
+ & (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
+ | SEC_EXCLUDE | SEC_SORT_ENTRIES | SEC_MERGE | SEC_STRINGS
+ | SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD
+ | SEC_THREAD_LOCAL)))
+ as_warn (_("ignoring changed section attributes for %s"), name);
+ if ((flags & SEC_MERGE) && old_sec->entsize != (unsigned) entsize)
+ as_warn (_("ignoring changed section entity size for %s"), name);
+ }
}
#ifdef md_elf_section_change_hook
- md_elf_section_change_hook ();
+ md_elf_section_change_hook ();
#endif
}
-int
-obj_elf_parse_section_letters (str, len)
- char *str;
- size_t len;
+static int
+obj_elf_parse_section_letters (char *str, size_t len)
{
int attr = 0;
case 'x':
attr |= SHF_EXECINSTR;
break;
+ case 'M':
+ attr |= SHF_MERGE;
+ break;
+ case 'S':
+ attr |= SHF_STRINGS;
+ break;
+ case 'G':
+ attr |= SHF_GROUP;
+ break;
+ case 'T':
+ attr |= SHF_TLS;
+ break;
+ /* Compatibility. */
+ case 'm':
+ if (*(str - 1) == 'a')
+ {
+ attr |= SHF_MERGE;
+ if (len > 1 && str[1] == 's')
+ {
+ attr |= SHF_STRINGS;
+ str++, len--;
+ }
+ break;
+ }
default:
{
- char *bad_msg = _("Unrecognized .section attribute: want a,w,x");
+ char *bad_msg = _("unrecognized .section attribute: want a,w,x,M,S,G,T");
#ifdef md_elf_section_letter
int md_attr = md_elf_section_letter (*str, &bad_msg);
if (md_attr >= 0)
attr |= md_attr;
else
#endif
- {
- as_warn (bad_msg);
- attr = -1;
- }
+ as_fatal ("%s", bad_msg);
}
break;
}
return attr;
}
-int
-obj_elf_section_word (str, len)
- char *str;
- size_t len;
+static int
+obj_elf_section_word (char *str, size_t len)
{
if (len == 5 && strncmp (str, "write", 5) == 0)
return SHF_WRITE;
return SHF_ALLOC;
if (len == 9 && strncmp (str, "execinstr", 9) == 0)
return SHF_EXECINSTR;
+ if (len == 3 && strncmp (str, "tls", 3) == 0)
+ return SHF_TLS;
#ifdef md_elf_section_word
{
}
#endif
- as_warn (_("Unrecognized section attribute"));
+ as_warn (_("unrecognized section attribute"));
return 0;
}
-int
-obj_elf_section_type (str, len)
- char *str;
- size_t len;
+static int
+obj_elf_section_type (char *str, size_t len)
{
if (len == 8 && strncmp (str, "progbits", 8) == 0)
return SHT_PROGBITS;
if (len == 6 && strncmp (str, "nobits", 6) == 0)
return SHT_NOBITS;
+ if (len == 4 && strncmp (str, "note", 4) == 0)
+ return SHT_NOTE;
+ if (len == 10 && strncmp (str, "init_array", 10) == 0)
+ return SHT_INIT_ARRAY;
+ if (len == 10 && strncmp (str, "fini_array", 10) == 0)
+ return SHT_FINI_ARRAY;
+ if (len == 13 && strncmp (str, "preinit_array", 13) == 0)
+ return SHT_PREINIT_ARRAY;
#ifdef md_elf_section_type
{
}
#endif
- as_warn (_("Unrecognized section type"));
+ as_warn (_("unrecognized section type"));
return 0;
}
-void
-obj_elf_section (push)
- int push;
+/* Get name of section. */
+static char *
+obj_elf_section_name (void)
{
- char *name, *beg, *end;
- int type, attr, dummy;
-
- if (flag_mri)
- {
- char mri_type;
-
-#ifdef md_flush_pending_output
- md_flush_pending_output ();
-#endif
-
- previous_section = now_seg;
- previous_subsection = now_subseg;
-
- s_mri_sect (&mri_type);
-
-#ifdef md_elf_section_change_hook
- md_elf_section_change_hook ();
-#endif
-
- return;
- }
+ char *name;
- /* Get name of section. */
SKIP_WHITESPACE ();
if (*input_line_pointer == '"')
{
+ int dummy;
+
name = demand_copy_C_string (&dummy);
if (name == NULL)
{
ignore_rest_of_line ();
- return;
+ return NULL;
}
}
else
{
- end = input_line_pointer;
+ char *end = input_line_pointer;
+
while (0 == strchr ("\n\t,; ", *end))
end++;
if (end == input_line_pointer)
{
- as_warn (_("Missing section name"));
+ as_bad (_("missing name"));
ignore_rest_of_line ();
- return;
+ return NULL;
}
-
+
name = xmalloc (end - input_line_pointer + 1);
memcpy (name, input_line_pointer, end - input_line_pointer);
name[end - input_line_pointer] = '\0';
+#ifdef tc_canonicalize_section_name
+ name = tc_canonicalize_section_name (name);
+#endif
input_line_pointer = end;
}
SKIP_WHITESPACE ();
+ return name;
+}
+
+void
+obj_elf_section (int push)
+{
+ char *name, *group_name, *beg;
+ int type, attr, dummy;
+ int entsize;
+ int linkonce;
+
+#ifndef TC_I370
+ if (flag_mri)
+ {
+ char mri_type;
+
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+ previous_section = now_seg;
+ previous_subsection = now_subseg;
+
+ s_mri_sect (&mri_type);
+
+#ifdef md_elf_section_change_hook
+ md_elf_section_change_hook ();
+#endif
+
+ return;
+ }
+#endif /* ! defined (TC_I370) */
+ name = obj_elf_section_name ();
+ if (name == NULL)
+ return;
type = SHT_NULL;
attr = 0;
+ group_name = NULL;
+ entsize = 0;
+ linkonce = 0;
if (*input_line_pointer == ',')
{
if (*input_line_pointer == ',')
{
char c;
+ char *save = input_line_pointer;
+
++input_line_pointer;
SKIP_WHITESPACE ();
c = *input_line_pointer;
*input_line_pointer = c;
type = obj_elf_section_type (beg, input_line_pointer - beg);
}
+ else
+ input_line_pointer = save;
+ }
+
+ SKIP_WHITESPACE ();
+ if ((attr & SHF_MERGE) != 0 && *input_line_pointer == ',')
+ {
+ ++input_line_pointer;
+ SKIP_WHITESPACE ();
+ entsize = get_absolute_expression ();
+ SKIP_WHITESPACE ();
+ if (entsize < 0)
+ {
+ as_warn (_("invalid merge entity size"));
+ attr &= ~SHF_MERGE;
+ entsize = 0;
+ }
+ }
+ else if ((attr & SHF_MERGE) != 0)
+ {
+ as_warn (_("entity size for SHF_MERGE not specified"));
+ attr &= ~SHF_MERGE;
+ }
+
+ if ((attr & SHF_GROUP) != 0 && *input_line_pointer == ',')
+ {
+ ++input_line_pointer;
+ group_name = obj_elf_section_name ();
+ if (group_name == NULL)
+ attr &= ~SHF_GROUP;
+ else if (strncmp (input_line_pointer, ",comdat", 7) == 0)
+ {
+ input_line_pointer += 7;
+ linkonce = 1;
+ }
+ else if (strncmp (name, ".gnu.linkonce", 13) == 0)
+ linkonce = 1;
+ }
+ else if ((attr & SHF_GROUP) != 0)
+ {
+ as_warn (_("group name for SHF_GROUP not specified"));
+ attr &= ~SHF_GROUP;
}
}
else
SKIP_WHITESPACE ();
if (*input_line_pointer != '#')
{
- as_warn (_("Bad .section directive - character following name is not '#'"));
+ as_bad (_("character following name is not '#'"));
ignore_rest_of_line ();
return;
}
demand_empty_rest_of_line ();
- obj_elf_change_section (name, type, attr, push);
+ obj_elf_change_section (name, type, attr, entsize, group_name, linkonce, push);
}
/* Change to the .data section. */
void
-obj_elf_data (i)
- int i;
+obj_elf_data (int i)
{
#ifdef md_flush_pending_output
md_flush_pending_output ();
/* Change to the .text section. */
void
-obj_elf_text (i)
- int i;
+obj_elf_text (int i)
{
#ifdef md_flush_pending_output
md_flush_pending_output ();
#endif
}
+/* Change to the *ABS* section. */
+
+void
+obj_elf_struct (int i)
+{
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
+ previous_section = now_seg;
+ previous_subsection = now_subseg;
+ s_struct (i);
+
+#ifdef md_elf_section_change_hook
+ md_elf_section_change_hook ();
+#endif
+}
+
static void
-obj_elf_subsection (ignore)
- int ignore ATTRIBUTE_UNUSED;
+obj_elf_subsection (int ignore ATTRIBUTE_UNUSED)
{
register int temp;
sections. */
void
-obj_elf_section_change_hook ()
+obj_elf_section_change_hook (void)
{
previous_section = now_seg;
previous_subsection = now_subseg;
}
void
-obj_elf_previous (ignore)
- int ignore ATTRIBUTE_UNUSED;
+obj_elf_previous (int ignore ATTRIBUTE_UNUSED)
{
segT new_section;
int new_subsection;
if (previous_section == 0)
{
- as_bad (_(".previous without corresponding .section; ignored"));
+ as_warn (_(".previous without corresponding .section; ignored"));
return;
}
}
static void
-obj_elf_popsection (xxx)
- int xxx ATTRIBUTE_UNUSED;
+obj_elf_popsection (int xxx ATTRIBUTE_UNUSED)
{
struct section_stack *top = section_stack;
if (top == NULL)
{
- as_bad (_(".popsection without corresponding .pushsection; ignored"));
+ as_warn (_(".popsection without corresponding .pushsection; ignored"));
return;
}
}
static void
-obj_elf_line (ignore)
- int ignore ATTRIBUTE_UNUSED;
+obj_elf_line (int ignore ATTRIBUTE_UNUSED)
{
/* Assume delimiter is part of expression. BSD4.2 as fails with
- delightful bug, so we are not being incompatible here. */
- new_logical_line ((char *) NULL, (int) (get_absolute_expression ()));
+ delightful bug, so we are not being incompatible here. */
+ new_logical_line (NULL, get_absolute_expression ());
demand_empty_rest_of_line ();
}
with the same value as the symbol NAME. */
static void
-obj_elf_symver (ignore)
- int ignore ATTRIBUTE_UNUSED;
+obj_elf_symver (int ignore ATTRIBUTE_UNUSED)
{
char *name;
char c;
+ char old_lexat;
symbolS *sym;
name = input_line_pointer;
*input_line_pointer = c;
- if (symbol_get_obj (sym)->versioned_name != NULL)
- {
- as_bad (_("multiple .symver directives for symbol `%s'"),
- S_GET_NAME (sym));
- ignore_rest_of_line ();
- return;
- }
-
SKIP_WHITESPACE ();
if (*input_line_pointer != ',')
{
}
++input_line_pointer;
+ SKIP_WHITESPACE ();
name = input_line_pointer;
- while (1)
- {
- c = get_symbol_end ();
- if (c != ELF_VER_CHR)
- break;
- *input_line_pointer++ = c;
- }
- symbol_get_obj (sym)->versioned_name = xstrdup (name);
+ /* Temporarily include '@' in symbol names. */
+ old_lexat = lex_type[(unsigned char) '@'];
+ lex_type[(unsigned char) '@'] |= LEX_NAME;
+ c = get_symbol_end ();
+ lex_type[(unsigned char) '@'] = old_lexat;
- *input_line_pointer = c;
+ if (symbol_get_obj (sym)->versioned_name == NULL)
+ {
+ symbol_get_obj (sym)->versioned_name = xstrdup (name);
- if (strchr (symbol_get_obj (sym)->versioned_name, ELF_VER_CHR) == NULL)
+ *input_line_pointer = c;
+
+ if (strchr (symbol_get_obj (sym)->versioned_name,
+ ELF_VER_CHR) == NULL)
+ {
+ as_bad (_("missing version name in `%s' for symbol `%s'"),
+ symbol_get_obj (sym)->versioned_name,
+ S_GET_NAME (sym));
+ ignore_rest_of_line ();
+ return;
+ }
+ }
+ else
{
- as_bad (_("missing version name in `%s' for symbol `%s'"),
- symbol_get_obj (sym)->versioned_name, S_GET_NAME (sym));
- ignore_rest_of_line ();
- return;
+ if (strcmp (symbol_get_obj (sym)->versioned_name, name))
+ {
+ as_bad (_("multiple versions [`%s'|`%s'] for symbol `%s'"),
+ name, symbol_get_obj (sym)->versioned_name,
+ S_GET_NAME (sym));
+ ignore_rest_of_line ();
+ return;
+ }
+
+ *input_line_pointer = c;
}
demand_empty_rest_of_line ();
to the linker the hierarchy in which a particular table resides. The
syntax is ".vtable_inherit CHILDNAME, PARENTNAME". */
-static void
-obj_elf_vtable_inherit (ignore)
- int ignore ATTRIBUTE_UNUSED;
+struct fix *
+obj_elf_vtable_inherit (int ignore ATTRIBUTE_UNUSED)
{
char *cname, *pname;
symbolS *csym, *psym;
{
as_bad ("expected comma after name in .vtable_inherit");
ignore_rest_of_line ();
- return;
+ return NULL;
}
++input_line_pointer;
if (input_line_pointer[0] == '0'
&& (input_line_pointer[1] == '\0'
- || isspace ((unsigned char) input_line_pointer[1])))
+ || ISSPACE (input_line_pointer[1])))
{
psym = section_symbol (absolute_section);
++input_line_pointer;
demand_empty_rest_of_line ();
if (bad)
- return;
+ return NULL;
assert (symbol_get_value_expression (csym)->X_op == O_constant);
- fix_new (symbol_get_frag (csym),
- symbol_get_value_expression (csym)->X_add_number, 0, psym, 0, 0,
- BFD_RELOC_VTABLE_INHERIT);
+ return fix_new (symbol_get_frag (csym),
+ symbol_get_value_expression (csym)->X_add_number,
+ 0, psym, 0, 0, BFD_RELOC_VTABLE_INHERIT);
}
-
+
/* This handles the .vtable_entry pseudo-op, which is used to indicate
to the linker that a vtable slot was used. The syntax is
".vtable_entry tablename, offset". */
-static void
-obj_elf_vtable_entry (ignore)
- int ignore ATTRIBUTE_UNUSED;
+struct fix *
+obj_elf_vtable_entry (int ignore ATTRIBUTE_UNUSED)
{
char *name;
symbolS *sym;
{
as_bad ("expected comma after name in .vtable_entry");
ignore_rest_of_line ();
- return;
+ return NULL;
}
++input_line_pointer;
offset = get_absolute_expression ();
- fix_new (frag_now, frag_now_fix (), 0, sym, offset, 0,
- BFD_RELOC_VTABLE_ENTRY);
-
demand_empty_rest_of_line ();
+
+ return fix_new (frag_now, frag_now_fix (), 0, sym, offset, 0,
+ BFD_RELOC_VTABLE_ENTRY);
}
void
-obj_read_begin_hook ()
+elf_obj_read_begin_hook (void)
{
#ifdef NEED_ECOFF_DEBUG
if (ECOFF_DEBUGGING)
}
void
-obj_symbol_new_hook (symbolP)
- symbolS *symbolP;
+elf_obj_symbol_new_hook (symbolS *symbolP)
{
struct elf_obj_sy *sy_obj;
#endif
}
+/* When setting one symbol equal to another, by default we probably
+ want them to have the same "size", whatever it means in the current
+ context. */
+
+void
+elf_copy_symbol_attributes (symbolS *dest, symbolS *src)
+{
+ struct elf_obj_sy *srcelf = symbol_get_obj (src);
+ struct elf_obj_sy *destelf = symbol_get_obj (dest);
+ if (srcelf->size)
+ {
+ if (destelf->size == NULL)
+ destelf->size = xmalloc (sizeof (expressionS));
+ *destelf->size = *srcelf->size;
+ }
+ else
+ {
+ if (destelf->size != NULL)
+ free (destelf->size);
+ destelf->size = NULL;
+ }
+ S_SET_SIZE (dest, S_GET_SIZE (src));
+ /* Don't copy visibility. */
+ S_SET_OTHER (dest, (ELF_ST_VISIBILITY (S_GET_OTHER (dest))
+ | (S_GET_OTHER (src) & ~ELF_ST_VISIBILITY (-1))));
+}
+
void
-obj_elf_version (ignore)
- int ignore ATTRIBUTE_UNUSED;
+obj_elf_version (int ignore ATTRIBUTE_UNUSED)
{
char *name;
unsigned int c;
- char ch;
char *p;
asection *seg = now_seg;
subsegT subseg = now_subseg;
Elf_Internal_Note i_note;
Elf_External_Note e_note;
- asection *note_secp = (asection *) NULL;
- int i, len;
+ asection *note_secp = NULL;
SKIP_WHITESPACE ();
if (*input_line_pointer == '\"')
{
- ++input_line_pointer; /* -> 1st char of string. */
+ unsigned int len;
+
+ ++input_line_pointer; /* -> 1st char of string. */
name = input_line_pointer;
while (is_a_char (c = next_char_of_string ()))
*(input_line_pointer - 1) = '\0';
*input_line_pointer = c;
- /* create the .note section */
-
+ /* Create the .note section. */
note_secp = subseg_new (".note", 0);
bfd_set_section_flags (stdoutput,
note_secp,
SEC_HAS_CONTENTS | SEC_READONLY);
- /* process the version string */
+ /* Process the version string. */
+ len = strlen (name) + 1;
- len = strlen (name);
-
- i_note.namesz = ((len + 1) + 3) & ~3; /* round this to word boundary */
- i_note.descsz = 0; /* no description */
+ /* PR 3456: Although the name field is padded out to an 4-byte
+ boundary, the namesz field should not be adjusted. */
+ i_note.namesz = len;
+ i_note.descsz = 0; /* No description. */
i_note.type = NT_VERSION;
p = frag_more (sizeof (e_note.namesz));
- md_number_to_chars (p, (valueT) i_note.namesz, 4);
+ md_number_to_chars (p, i_note.namesz, sizeof (e_note.namesz));
p = frag_more (sizeof (e_note.descsz));
- md_number_to_chars (p, (valueT) i_note.descsz, 4);
+ md_number_to_chars (p, i_note.descsz, sizeof (e_note.descsz));
p = frag_more (sizeof (e_note.type));
- md_number_to_chars (p, (valueT) i_note.type, 4);
+ md_number_to_chars (p, i_note.type, sizeof (e_note.type));
+ p = frag_more (len);
+ memcpy (p, name, len);
- for (i = 0; i < len; i++)
- {
- ch = *(name + i);
- {
- FRAG_APPEND_1_CHAR (ch);
- }
- }
frag_align (2, 0, 0);
subseg_set (seg, subseg);
}
else
- {
- as_bad (_("Expected quoted string"));
- }
+ as_bad (_("expected quoted string"));
+
demand_empty_rest_of_line ();
}
static void
-obj_elf_size (ignore)
- int ignore ATTRIBUTE_UNUSED;
+obj_elf_size (int ignore ATTRIBUTE_UNUSED)
{
char *name = input_line_pointer;
char c = get_symbol_end ();
sym = symbol_find_or_make (name);
*p = c;
if (exp.X_op == O_constant)
- S_SET_SIZE (sym, exp.X_add_number);
+ {
+ S_SET_SIZE (sym, exp.X_add_number);
+ if (symbol_get_obj (sym)->size)
+ {
+ xfree (symbol_get_obj (sym)->size);
+ symbol_get_obj (sym)->size = NULL;
+ }
+ }
else
{
- symbol_get_obj (sym)->size =
- (expressionS *) xmalloc (sizeof (expressionS));
+ symbol_get_obj (sym)->size = xmalloc (sizeof (expressionS));
*symbol_get_obj (sym)->size = exp;
}
demand_empty_rest_of_line ();
}
/* Handle the ELF .type pseudo-op. This sets the type of a symbol.
- There are four syntaxes:
-
+ There are five syntaxes:
+
The first (used on Solaris) is
.type SYM,#function
The second (used on UnixWare) is
.type SYM STT_FUNC
The fourth (used on NetBSD/Arm and Linux/ARM) is
.type SYM,%function
+ The fifth (used on SVR4/860) is
+ .type SYM,"function"
*/
static void
-obj_elf_type (ignore)
- int ignore ATTRIBUTE_UNUSED;
+obj_elf_type (int ignore ATTRIBUTE_UNUSED)
{
char *name;
char c;
int type;
const char *typename;
symbolS *sym;
+ elf_symbol_type *elfsym;
name = input_line_pointer;
c = get_symbol_end ();
sym = symbol_find_or_make (name);
+ elfsym = (elf_symbol_type *) symbol_get_bfdsym (sym);
*input_line_pointer = c;
SKIP_WHITESPACE ();
SKIP_WHITESPACE ();
if ( *input_line_pointer == '#'
|| *input_line_pointer == '@'
+ || *input_line_pointer == '"'
|| *input_line_pointer == '%')
++input_line_pointer;
else if (strcmp (typename, "object") == 0
|| strcmp (typename, "STT_OBJECT") == 0)
type = BSF_OBJECT;
+ else if (strcmp (typename, "tls_object") == 0
+ || strcmp (typename, "STT_TLS") == 0)
+ type = BSF_OBJECT | BSF_THREAD_LOCAL;
+ else if (strcmp (typename, "notype") == 0
+ || strcmp (typename, "STT_NOTYPE") == 0)
+ ;
+#ifdef md_elf_symbol_type
+ else if ((type = md_elf_symbol_type (typename, sym, elfsym)) != -1)
+ ;
+#endif
else
- as_bad (_("ignoring unrecognized symbol type \"%s\""), typename);
+ as_bad (_("unrecognized symbol type \"%s\""), typename);
*input_line_pointer = c;
- symbol_get_bfdsym (sym)->flags |= type;
+ if (*input_line_pointer == '"')
+ ++input_line_pointer;
+
+ elfsym->symbol.flags |= type;
demand_empty_rest_of_line ();
}
static void
-obj_elf_ident (ignore)
- int ignore ATTRIBUTE_UNUSED;
+obj_elf_ident (int ignore ATTRIBUTE_UNUSED)
{
static segT comment_section;
segT old_section = now_seg;
int old_subsection = now_subseg;
+#ifdef md_flush_pending_output
+ md_flush_pending_output ();
+#endif
+
if (!comment_section)
{
char *p;
/* The first entry in a .stabs section is special. */
void
-obj_elf_init_stab_section (seg)
- segT seg;
+obj_elf_init_stab_section (segT seg)
{
char *file;
char *p;
UnixWare ar crashes. */
bfd_set_section_alignment (stdoutput, seg, 2);
- /* Make space for this first symbol. */
+ /* Make space for this first symbol. */
p = frag_more (12);
- /* Zero it out. */
+ /* Zero it out. */
memset (p, 0, 12);
- as_where (&file, (unsigned int *) NULL);
- stabstr_name = (char *) alloca (strlen (segment_name (seg)) + 4);
+ as_where (&file, NULL);
+ stabstr_name = xmalloc (strlen (segment_name (seg)) + 4);
strcpy (stabstr_name, segment_name (seg));
strcat (stabstr_name, "str");
stroff = get_stab_string_offset (file, stabstr_name);
/* Fill in the counts in the first entry in a .stabs section. */
static void
-adjust_stab_sections (abfd, sec, xxx)
- bfd *abfd;
- asection *sec;
- PTR xxx ATTRIBUTE_UNUSED;
+adjust_stab_sections (bfd *abfd, asection *sec, void *xxx ATTRIBUTE_UNUSED)
{
char *name;
asection *strsec;
if (!strcmp ("str", sec->name + strlen (sec->name) - 3))
return;
- name = (char *) alloca (strlen (sec->name) + 4);
+ name = alloca (strlen (sec->name) + 4);
strcpy (name, sec->name);
strcat (name, "str");
strsec = bfd_get_section_by_name (abfd, name);
p = seg_info (sec)->stabu.p;
assert (p != 0);
- bfd_h_put_16 (abfd, (bfd_vma) nsyms, (bfd_byte *) p + 6);
- bfd_h_put_32 (abfd, (bfd_vma) strsz, (bfd_byte *) p + 8);
+ bfd_h_put_16 (abfd, nsyms, p + 6);
+ bfd_h_put_32 (abfd, strsz, p + 8);
}
#ifdef NEED_ECOFF_DEBUG
in the symbol. */
void
-elf_ecoff_set_ext (sym, ext)
- symbolS *sym;
- struct ecoff_extr *ext;
+elf_ecoff_set_ext (symbolS *sym, struct ecoff_extr *ext)
{
- symbol_get_bfdsym (sym)->udata.p = (PTR) ext;
+ symbol_get_bfdsym (sym)->udata.p = ext;
}
/* This function is called by bfd_ecoff_debug_externals. It is
supposed to *EXT to the external symbol information, and return
whether the symbol should be used at all. */
-static boolean
-elf_get_extr (sym, ext)
- asymbol *sym;
- EXTR *ext;
+static bfd_boolean
+elf_get_extr (asymbol *sym, EXTR *ext)
{
if (sym->udata.p == NULL)
- return false;
+ return FALSE;
*ext = *(EXTR *) sym->udata.p;
- return true;
+ return TRUE;
}
/* This function is called by bfd_ecoff_debug_externals. It has
nothing to do for ELF. */
-/*ARGSUSED*/
static void
-elf_set_index (sym, indx)
- asymbol *sym;
- bfd_size_type indx;
+elf_set_index (asymbol *sym ATTRIBUTE_UNUSED,
+ bfd_size_type indx ATTRIBUTE_UNUSED)
{
}
#endif /* NEED_ECOFF_DEBUG */
void
-elf_frob_symbol (symp, puntp)
- symbolS *symp;
- int *puntp;
+elf_frob_symbol (symbolS *symp, int *puntp)
{
struct elf_obj_sy *sy_obj;
if (sy_obj->versioned_name != NULL)
{
+ char *p;
+
+ p = strchr (sy_obj->versioned_name, ELF_VER_CHR);
+ know (p != NULL);
+
/* This symbol was given a new name with the .symver directive.
- If this is an external reference, just rename the symbol to
- include the version string. This will make the relocs be
- against the correct versioned symbol.
+ If this is an external reference, just rename the symbol to
+ include the version string. This will make the relocs be
+ against the correct versioned symbol.
If this is a definition, add an alias. FIXME: Using an alias
will permit the debugging information to refer to the right
if (! S_IS_DEFINED (symp))
{
- char *p;
-
/* Verify that the name isn't using the @@ syntax--this is
- reserved for definitions of the default version to link
- against. */
- p = strchr (sy_obj->versioned_name, ELF_VER_CHR);
- know (p != NULL);
+ reserved for definitions of the default version to link
+ against. */
if (p[1] == ELF_VER_CHR)
{
as_bad (_("invalid attempt to declare external version name as default in symbol `%s'"),
sy_obj->versioned_name);
- *puntp = true;
+ *puntp = TRUE;
}
S_SET_NAME (symp, sy_obj->versioned_name);
}
else
{
- symbolS *symp2;
+ if (p[1] == ELF_VER_CHR && p[2] == ELF_VER_CHR)
+ {
+ size_t l;
+
+ /* The @@@ syntax is a special case. It renames the
+ symbol name to versioned_name with one `@' removed. */
+ l = strlen (&p[3]) + 1;
+ memmove (&p[2], &p[3], l);
+ S_SET_NAME (symp, sy_obj->versioned_name);
+ }
+ else
+ {
+ symbolS *symp2;
- /* FIXME: Creating a new symbol here is risky. We're in the
- final loop over the symbol table. We can get away with
- it only because the symbol goes to the end of the list,
- where the loop will still see it. It would probably be
- better to do this in obj_frob_file_before_adjust. */
+ /* FIXME: Creating a new symbol here is risky. We're
+ in the final loop over the symbol table. We can
+ get away with it only because the symbol goes to
+ the end of the list, where the loop will still see
+ it. It would probably be better to do this in
+ obj_frob_file_before_adjust. */
- symp2 = symbol_find_or_make (sy_obj->versioned_name);
+ symp2 = symbol_find_or_make (sy_obj->versioned_name);
- /* Now we act as though we saw symp2 = sym. */
+ /* Now we act as though we saw symp2 = sym. */
- S_SET_SEGMENT (symp2, S_GET_SEGMENT (symp));
+ S_SET_SEGMENT (symp2, S_GET_SEGMENT (symp));
- /* Subtracting out the frag address here is a hack because
- we are in the middle of the final loop. */
- S_SET_VALUE (symp2,
- (S_GET_VALUE (symp)
- - symbol_get_frag (symp)->fr_address));
+ /* Subtracting out the frag address here is a hack
+ because we are in the middle of the final loop. */
+ S_SET_VALUE (symp2,
+ (S_GET_VALUE (symp)
+ - symbol_get_frag (symp)->fr_address));
- symbol_set_frag (symp2, symbol_get_frag (symp));
+ symbol_set_frag (symp2, symbol_get_frag (symp));
- /* This will copy over the size information. */
- copy_symbol_attributes (symp2, symp);
+ /* This will copy over the size information. */
+ copy_symbol_attributes (symp2, symp);
- if (S_IS_WEAK (symp))
- S_SET_WEAK (symp2);
+ S_SET_OTHER (symp2, S_GET_OTHER (symp));
- if (S_IS_EXTERNAL (symp))
- S_SET_EXTERNAL (symp2);
+ if (S_IS_WEAK (symp))
+ S_SET_WEAK (symp2);
+
+ if (S_IS_EXTERNAL (symp))
+ S_SET_EXTERNAL (symp2);
+ }
}
}
if (S_IS_WEAK (symp))
{
if (S_IS_COMMON (symp))
- as_bad (_("Symbol `%s' can not be both weak and common"),
+ as_bad (_("symbol `%s' can not be both weak and common"),
S_GET_NAME (symp));
}
&& (symbol_get_bfdsym (symp)->flags & BSF_FUNCTION) == 0)
symbol_get_bfdsym (symp)->flags |= BSF_OBJECT;
#endif
+}
-#ifdef TC_PPC
- /* Frob the PowerPC, so that the symbol always has object type
- if it is not some other type. VxWorks needs this. */
- if ((symbol_get_bfdsym (symp)->flags
- & (BSF_FUNCTION | BSF_FILE | BSF_SECTION_SYM)) == 0
- && S_IS_DEFINED (symp))
- symbol_get_bfdsym (symp)->flags |= BSF_OBJECT;
-#endif
+struct group_list
+{
+ asection **head; /* Section lists. */
+ unsigned int *elt_count; /* Number of sections in each list. */
+ unsigned int num_group; /* Number of lists. */
+};
+
+/* Called via bfd_map_over_sections. If SEC is a member of a group,
+ add it to a list of sections belonging to the group. INF is a
+ pointer to a struct group_list, which is where we store the head of
+ each list. */
+
+static void
+build_group_lists (bfd *abfd ATTRIBUTE_UNUSED, asection *sec, void *inf)
+{
+ struct group_list *list = inf;
+ const char *group_name = elf_group_name (sec);
+ unsigned int i;
+
+ if (group_name == NULL)
+ return;
+
+ /* If this group already has a list, add the section to the head of
+ the list. */
+ for (i = 0; i < list->num_group; i++)
+ {
+ if (strcmp (group_name, elf_group_name (list->head[i])) == 0)
+ {
+ elf_next_in_group (sec) = list->head[i];
+ list->head[i] = sec;
+ list->elt_count[i] += 1;
+ return;
+ }
+ }
+
+ /* New group. Make the arrays bigger in chunks to minimize calls to
+ realloc. */
+ i = list->num_group;
+ if ((i & 127) == 0)
+ {
+ unsigned int newsize = i + 128;
+ list->head = xrealloc (list->head, newsize * sizeof (*list->head));
+ list->elt_count = xrealloc (list->elt_count,
+ newsize * sizeof (*list->elt_count));
+ }
+ list->head[i] = sec;
+ list->elt_count[i] = 1;
+ list->num_group += 1;
}
void
-elf_frob_file ()
+elf_frob_file (void)
{
- bfd_map_over_sections (stdoutput, adjust_stab_sections, (PTR) 0);
+ struct group_list list;
+ unsigned int i;
+
+ bfd_map_over_sections (stdoutput, adjust_stab_sections, NULL);
+
+ /* Go find section groups. */
+ list.num_group = 0;
+ list.head = NULL;
+ list.elt_count = NULL;
+ bfd_map_over_sections (stdoutput, build_group_lists, &list);
+
+ /* Make the SHT_GROUP sections that describe each section group. We
+ can't set up the section contents here yet, because elf section
+ indices have yet to be calculated. elf.c:set_group_contents does
+ the rest of the work. */
+ for (i = 0; i < list.num_group; i++)
+ {
+ const char *group_name = elf_group_name (list.head[i]);
+ const char *sec_name;
+ asection *s;
+ flagword flags;
+ struct symbol *sy;
+ int has_sym;
+ bfd_size_type size;
+
+ flags = SEC_READONLY | SEC_HAS_CONTENTS | SEC_IN_MEMORY | SEC_GROUP;
+ for (s = list.head[i]; s != NULL; s = elf_next_in_group (s))
+ if ((s->flags ^ flags) & SEC_LINK_ONCE)
+ {
+ flags |= SEC_LINK_ONCE | SEC_LINK_DUPLICATES_DISCARD;
+ if (s != list.head[i])
+ {
+ as_warn (_("assuming all members of group `%s' are COMDAT"),
+ group_name);
+ break;
+ }
+ }
+
+ sec_name = group_name;
+ sy = symbol_find_exact (group_name);
+ has_sym = 0;
+ if (sy != NULL
+ && (sy == symbol_lastP
+ || (sy->sy_next != NULL
+ && sy->sy_next->sy_previous == sy)))
+ {
+ has_sym = 1;
+ sec_name = ".group";
+ }
+ s = subseg_force_new (sec_name, 0);
+ if (s == NULL
+ || !bfd_set_section_flags (stdoutput, s, flags)
+ || !bfd_set_section_alignment (stdoutput, s, 2))
+ {
+ as_fatal (_("can't create group: %s"),
+ bfd_errmsg (bfd_get_error ()));
+ }
+ elf_section_type (s) = SHT_GROUP;
+
+ /* Pass a pointer to the first section in this group. */
+ elf_next_in_group (s) = list.head[i];
+ if (has_sym)
+ elf_group_id (s) = sy->bsym;
+
+ size = 4 * (list.elt_count[i] + 1);
+ bfd_set_section_size (stdoutput, s, size);
+ s->contents = (unsigned char *) frag_more (size);
+ frag_now->fr_fix = frag_now_fix_octets ();
+ }
#ifdef elf_tc_final_processing
elf_tc_final_processing ();
#endif
}
+/* It removes any unneeded versioned symbols from the symbol table. */
+
+void
+elf_frob_file_before_adjust (void)
+{
+ if (symbol_rootP)
+ {
+ symbolS *symp;
+
+ for (symp = symbol_rootP; symp; symp = symbol_next (symp))
+ if (!S_IS_DEFINED (symp))
+ {
+ if (symbol_get_obj (symp)->versioned_name)
+ {
+ char *p;
+
+ /* The @@@ syntax is a special case. If the symbol is
+ not defined, 2 `@'s will be removed from the
+ versioned_name. */
+
+ p = strchr (symbol_get_obj (symp)->versioned_name,
+ ELF_VER_CHR);
+ know (p != NULL);
+ if (p[1] == ELF_VER_CHR && p[2] == ELF_VER_CHR)
+ {
+ size_t l = strlen (&p[3]) + 1;
+ memmove (&p[1], &p[3], l);
+ }
+ if (symbol_used_p (symp) == 0
+ && symbol_used_in_reloc_p (symp) == 0)
+ symbol_remove (symp, &symbol_rootP, &symbol_lastP);
+ }
+
+ /* If there was .weak foo, but foo was neither defined nor
+ used anywhere, remove it. */
+
+ else if (S_IS_WEAK (symp)
+ && symbol_used_p (symp) == 0
+ && symbol_used_in_reloc_p (symp) == 0)
+ symbol_remove (symp, &symbol_rootP, &symbol_lastP);
+ }
+ }
+}
+
/* It is required that we let write_relocs have the opportunity to
optimize away fixups before output has begun, since it is possible
to eliminate all fixups for a section and thus we never should
have generated the relocation section. */
void
-elf_frob_file_after_relocs ()
+elf_frob_file_after_relocs (void)
{
#ifdef NEED_ECOFF_DEBUG
if (ECOFF_DEBUGGING)
debug_swap
= get_elf_backend_data (stdoutput)->elf_backend_ecoff_debug_swap;
- know (debug_swap != (const struct ecoff_debug_swap *) NULL);
+ know (debug_swap != NULL);
ecoff_build_debug (&debug.symbolic_header, &buf, debug_swap);
/* Set up the pointers in debug. */
debug.ptr = (type) (buf + debug.symbolic_header.offset)
SET (line, cbLineOffset, unsigned char *);
- SET (external_dnr, cbDnOffset, PTR);
- SET (external_pdr, cbPdOffset, PTR);
- SET (external_sym, cbSymOffset, PTR);
- SET (external_opt, cbOptOffset, PTR);
+ SET (external_dnr, cbDnOffset, void *);
+ SET (external_pdr, cbPdOffset, void *);
+ SET (external_sym, cbSymOffset, void *);
+ SET (external_opt, cbOptOffset, void *);
SET (external_aux, cbAuxOffset, union aux_ext *);
SET (ss, cbSsOffset, char *);
- SET (external_fdr, cbFdOffset, PTR);
- SET (external_rfd, cbRfdOffset, PTR);
+ SET (external_fdr, cbFdOffset, void *);
+ SET (external_rfd, cbRfdOffset, void *);
/* ssext and external_ext are set up just below. */
#undef SET
/* Set up the external symbols. */
debug.ssext = debug.ssext_end = NULL;
debug.external_ext = debug.external_ext_end = NULL;
- if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, true,
+ if (! bfd_ecoff_debug_externals (stdoutput, &debug, debug_swap, TRUE,
elf_get_extr, elf_set_index))
- as_fatal (_("Failed to set up debugging information: %s"),
+ as_fatal (_("failed to set up debugging information: %s"),
bfd_errmsg (bfd_get_error ()));
sec = bfd_get_section_by_name (stdoutput, ".mdebug");
assert (sec != NULL);
- know (stdoutput->output_has_begun == false);
+ know (!stdoutput->output_has_begun);
/* We set the size of the section, call bfd_set_section_contents
to force the ELF backend to allocate a file position, and then
write out the data. FIXME: Is this really the best way to do
this? */
- sec->_raw_size = bfd_ecoff_debug_size (stdoutput, &debug, debug_swap);
-
- if (! bfd_set_section_contents (stdoutput, sec, (PTR) NULL,
- (file_ptr) 0, (bfd_size_type) 0))
- as_fatal (_("Can't start writing .mdebug section: %s"),
+ bfd_set_section_size
+ (stdoutput, sec, bfd_ecoff_debug_size (stdoutput, &debug, debug_swap));
+
+ /* Pass BUF to bfd_set_section_contents because this will
+ eventually become a call to fwrite, and ISO C prohibits
+ passing a NULL pointer to a stdio function even if the
+ pointer will not be used. */
+ if (! bfd_set_section_contents (stdoutput, sec, buf, 0, 0))
+ as_fatal (_("can't start writing .mdebug section: %s"),
bfd_errmsg (bfd_get_error ()));
- know (stdoutput->output_has_begun == true);
+ know (stdoutput->output_has_begun);
know (sec->filepos != 0);
if (! bfd_ecoff_write_debug (stdoutput, &debug, debug_swap,
sec->filepos))
- as_fatal (_("Could not write .mdebug section: %s"),
+ as_fatal (_("could not write .mdebug section: %s"),
bfd_errmsg (bfd_get_error ()));
}
#endif /* NEED_ECOFF_DEBUG */
#ifdef SCO_ELF
-/* Heavily plagarized from obj_elf_version. The idea is to emit the
+/* Heavily plagiarized from obj_elf_version. The idea is to emit the
SCO specific identifier in the .notes section to satisfy the SCO
linker.
SCO OpenServer 5 identifies it's ELF modules with a standard ELF
.note section.
- int_32 namesz = 4 ; Name size
- int_32 descsz = 12 ; Descriptive information
- int_32 type = 1 ;
- char name[4] = "SCO" ; Originator name ALWAYS SCO + NULL
+ int_32 namesz = 4 ; Name size
+ int_32 descsz = 12 ; Descriptive information
+ int_32 type = 1 ;
+ char name[4] = "SCO" ; Originator name ALWAYS SCO + NULL
int_32 version = (major ver # << 16) | version of tools ;
int_32 source = (tool_id << 16 ) | 1 ;
int_32 info = 0 ; These are set by the SCO tools, but we
- don't know enough about the source
+ don't know enough about the source
environment to set them. SCO ld currently
ignores them, and recommends we set them
to zero. */
#define SCO_MINOR_VERSION 0x1
void
-sco_id ()
+sco_id (void)
{
char *name;
subsegT subseg = now_subseg;
Elf_Internal_Note i_note;
Elf_External_Note e_note;
- asection *note_secp = (asection *) NULL;
+ asection *note_secp = NULL;
int i, len;
/* create the .note section */
/* process the version string */
- i_note.namesz = 4;
+ i_note.namesz = 4;
i_note.descsz = 12; /* 12 descriptive bytes */
i_note.type = NT_VERSION; /* Contains a version string */
p = frag_more (sizeof (i_note.namesz));
- md_number_to_chars (p, (valueT) i_note.namesz, 4);
+ md_number_to_chars (p, i_note.namesz, 4);
p = frag_more (sizeof (i_note.descsz));
- md_number_to_chars (p, (valueT) i_note.descsz, 4);
+ md_number_to_chars (p, i_note.descsz, 4);
p = frag_more (sizeof (i_note.type));
- md_number_to_chars (p, (valueT) i_note.type, 4);
+ md_number_to_chars (p, i_note.type, 4);
p = frag_more (4);
- strcpy (p, "SCO");
+ strcpy (p, "SCO");
/* Note: this is the version number of the ELF we're representing */
p = frag_more (4);
and just set them to zero. */
p = frag_more (4);
md_number_to_chars (p, 0x0000, 4);
-
+
frag_align (2, 0, 0);
/* We probably can't restore the current segment, for there likely
#endif /* SCO_ELF */
+static int
+elf_separate_stab_sections (void)
+{
+#ifdef NEED_ECOFF_DEBUG
+ return (!ECOFF_DEBUGGING);
+#else
+ return 1;
+#endif
+}
+
+static void
+elf_init_stab_section (segT seg)
+{
+#ifdef NEED_ECOFF_DEBUG
+ if (!ECOFF_DEBUGGING)
+#endif
+ obj_elf_init_stab_section (seg);
+}
+
const struct format_ops elf_format_ops =
{
bfd_target_elf_flavour,
- 0,
- 1,
+ 0, /* dfl_leading_underscore */
+ 1, /* emit_section_symbols */
+ elf_begin,
+ elf_file_symbol,
elf_frob_symbol,
elf_frob_file,
+ elf_frob_file_before_adjust,
+ 0, /* obj_frob_file_before_fix */
elf_frob_file_after_relocs,
elf_s_get_size, elf_s_set_size,
elf_s_get_align, elf_s_set_align,
+ elf_s_get_other,
+ elf_s_set_other,
+ 0, /* s_get_desc */
+ 0, /* s_set_desc */
+ 0, /* s_get_type */
+ 0, /* s_set_type */
elf_copy_symbol_attributes,
#ifdef NEED_ECOFF_DEBUG
ecoff_generate_asm_lineno,
ecoff_stab,
#else
- 0,
- 0, /* process_stab */
+ 0, /* generate_asm_lineno */
+ 0, /* process_stab */
#endif
+ elf_separate_stab_sections,
+ elf_init_stab_section,
elf_sec_sym_ok_for_reloc,
elf_pop_insert,
#ifdef NEED_ECOFF_DEBUG
elf_ecoff_set_ext,
#else
- 0,
+ 0, /* ecoff_set_ext */
#endif
- obj_read_begin_hook,
- obj_symbol_new_hook,
+ elf_obj_read_begin_hook,
+ elf_obj_symbol_new_hook
};
projects / binutils.git / blobdiff