/* ELF object file format
- Copyright (C) 1992, 93, 94, 95, 96, 97, 98, 99, 2000
+ Copyright 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000
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. */
+ 02111-1307, USA. */
#define OBJ_HEADER "obj-elf.h"
#include "as.h"
static void obj_elf_local PARAMS ((int));
static void obj_elf_visibility 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));
{"version", obj_elf_version, 0},
{"weak", obj_elf_weak, 0},
- /* These define symbol visibility. */
+ /* These define symbol visibility. */
{"internal", obj_elf_visibility, STV_INTERNAL},
{"hidden", obj_elf_visibility, STV_HIDDEN},
{"protected", obj_elf_visibility, STV_PROTECTED},
{"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 (*) PARAMS ((int))) &obj_elf_vtable_inherit, 0},
+ {"vtable_entry", (void (*) PARAMS ((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},
demand_empty_rest_of_line ();
}
-
static segT previous_section;
static int previous_subsection;
static struct section_stack *section_stack;
-
/* Handle the .section pseudo-op. This code supports two different
syntaxes.
};
void
-obj_elf_change_section (name, type, attr, push)
+obj_elf_change_section (name, type, attr, entsize, push)
char *name;
- int type, attr, push;
+ int type, attr, entsize, push;
{
asection *old_sec;
segT sec;
| ((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_EXECINSTR) ? SEC_CODE : 0)
+ | ((attr & SHF_MERGE) ? SEC_MERGE : 0)
+ | ((attr & SHF_STRINGS) ? SEC_STRINGS : 0));
#ifdef md_elf_section_flags
flags = md_elf_section_flags (flags, attr, type);
#endif
seg_info (sec)->bss = 1;
bfd_set_section_flags (stdoutput, sec, flags);
+ if (flags & SEC_MERGE)
+ sec->entsize = entsize;
/* Add a symbol for this section to the symbol table. */
secsym = symbol_find (name);
saw the first time. */
if ((old_sec->flags ^ flags)
& (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
- | SEC_EXCLUDE | SEC_SORT_ENTRIES))
+ | SEC_EXCLUDE | SEC_SORT_ENTRIES | SEC_MERGE | SEC_STRINGS))
as_warn (_("Ignoring changed section attributes for %s"), name);
+ else if ((flags & SEC_MERGE) && old_sec->entsize != entsize)
+ as_warn (_("Ignoring changed section entity size for %s"), name);
}
#ifdef md_elf_section_change_hook
case 'x':
attr |= SHF_EXECINSTR;
break;
+ case 'm':
+ attr |= SHF_MERGE;
+ break;
+ case 's':
+ attr |= SHF_STRINGS;
+ break;
default:
{
- char *bad_msg = _("Unrecognized .section attribute: want a,w,x");
+ char *bad_msg = _("Unrecognized .section attribute: want a,m,s,w,x");
#ifdef md_elf_section_letter
int md_attr = md_elf_section_letter (*str, &bad_msg);
if (md_attr >= 0)
{
char *name, *beg, *end;
int type, attr, dummy;
+ int entsize;
#ifndef TC_I370
if (flag_mri)
type = SHT_NULL;
attr = 0;
+ entsize = 0;
if (*input_line_pointer == ',')
{
type = obj_elf_section_type (beg, input_line_pointer - beg);
}
}
+
+ SKIP_WHITESPACE ();
+ if ((attr & SHF_MERGE) && *input_line_pointer == ',')
+ {
+ ++input_line_pointer;
+ SKIP_WHITESPACE ();
+ entsize = get_absolute_expression ();
+ if (entsize < 0)
+ {
+ as_warn (_("Bad .section directive - invalid merge entity size"));
+ attr &= ~SHF_MERGE;
+ entsize = 0;
+ }
+ }
}
else
{
demand_empty_rest_of_line ();
- obj_elf_change_section (name, type, attr, push);
+ if ((attr & SHF_MERGE) && entsize == 0)
+ {
+ as_warn (_("Entity size for SHF_MERGE not specified.\nSpecify entity size as 4th argument"));
+ attr &= SHF_MERGE;
+ }
+
+#ifdef md_elf_section_change_data_hook
+ md_elf_section_change_data_hook (name, type, attr, entsize, push);
+#endif
+
+ obj_elf_change_section (name, type, attr, entsize, push);
}
/* Change to the .data section. */
int ignore ATTRIBUTE_UNUSED;
{
/* Assume delimiter is part of expression. BSD4.2 as fails with
- delightful bug, so we are not being incompatible here. */
+ delightful bug, so we are not being incompatible here. */
new_logical_line ((char *) NULL, (int) (get_absolute_expression ()));
demand_empty_rest_of_line ();
}
*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++ = c;
}
- symbol_get_obj (sym)->versioned_name = xstrdup (name);
+ if (symbol_get_obj (sym)->versioned_name == NULL)
+ {
+ symbol_get_obj (sym)->versioned_name = xstrdup (name);
- *input_line_pointer = c;
+ *input_line_pointer = c;
- if (strchr (symbol_get_obj (sym)->versioned_name, ELF_VER_CHR) == NULL)
+ 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
+struct fix *
obj_elf_vtable_inherit (ignore)
int ignore ATTRIBUTE_UNUSED;
{
{
as_bad ("expected comma after name in .vtable_inherit");
ignore_rest_of_line ();
- return;
+ return NULL;
}
++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
+struct fix *
obj_elf_vtable_entry (ignore)
int ignore ATTRIBUTE_UNUSED;
{
{
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
SKIP_WHITESPACE ();
if (*input_line_pointer == '\"')
{
- ++input_line_pointer; /* -> 1st char of string. */
+ ++input_line_pointer; /* -> 1st char of string. */
name = input_line_pointer;
while (is_a_char (c = next_char_of_string ()))
}
/* 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
.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
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;
+#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);
*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 ();
}
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);
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
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);
if (p[1] == ELF_VER_CHR)
{
as_bad (_("invalid attempt to declare external version name as default in symbol `%s'"),
}
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);
+ if (S_IS_WEAK (symp))
+ S_SET_WEAK (symp2);
- if (S_IS_EXTERNAL (symp))
- S_SET_EXTERNAL (symp2);
+ if (S_IS_EXTERNAL (symp))
+ S_SET_EXTERNAL (symp2);
+ }
}
}
#endif
}
+/* It removes any unneeded versioned symbols from the symbol table. */
+
+void
+elf_frob_file_before_adjust ()
+{
+ if (symbol_rootP)
+ {
+ symbolS *symp;
+
+ for (symp = symbol_rootP; symp; symp = symbol_next (symp))
+ if (symbol_get_obj (symp)->versioned_name)
+ {
+ if (!S_IS_DEFINED (symp))
+ {
+ 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);
+ }
+ }
+ }
+}
+
/* 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
elf_file_symbol,
elf_frob_symbol,
elf_frob_file,
+ elf_frob_file_before_adjust,
elf_frob_file_after_relocs,
elf_s_get_size, elf_s_set_size,
elf_s_get_align, elf_s_set_align,
projects / binutils-gdb.git / blobdiff