blob: 1dacb01209ca9fe88ffe38484d6a578b97ea4a3b [file] [log] [blame]
/* Create new ABS symbol.
Copyright (C) 2002 Red Hat, Inc.
This file is part of Red Hat elfutils.
Written by Ulrich Drepper <>, 2002.
Red Hat elfutils is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by the
Free Software Foundation; version 2 of the License.
Red Hat elfutils is distributed in the hope that it will be useful, but
WITHOUT ANY WARRANTY; without even the implied warranty of
General Public License for more details.
You should have received a copy of the GNU General Public License along
with Red Hat elfutils; if not, write to the Free Software Foundation,
Inc., 51 Franklin Street, Fifth Floor, Boston MA 02110-1301 USA.
Red Hat elfutils is an included package of the Open Invention Network.
An included package of the Open Invention Network is a package for which
Open Invention Network licensees cross-license their patents. No patent
license is granted, either expressly or impliedly, by designation as an
included package. Should you wish to participate in the Open Invention
Network licensing program, please visit
<>. */
# include <config.h>
#include <inttypes.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <libasmP.h>
#include <system.h>
/* Object for special COMMON section. */
static const AsmScn_t __libasm_abs_scn =
.data = {
.main = {
.scn = ASM_ABS_SCN
AsmSym_t *
asm_newabssym (ctx, name, size, value, type, binding)
AsmCtx_t *ctx;
const char *name;
GElf_Xword size;
GElf_Addr value;
int type;
int binding;
AsmSym_t *result;
if (ctx == NULL)
/* Something went wrong before. */
return NULL;
/* Common symbols are public. Therefore the user must provide a
name. */
if (name == NULL)
__libasm_seterrno (ASM_E_INVALID);
return NULL;
rwlock_wrlock (ctx->lock);
result = (AsmSym_t *) malloc (sizeof (AsmSym_t));
if (result == NULL)
return NULL;
result->scn = (AsmScn_t *) &__libasm_abs_scn;
result->size = size;
result->type = type;
result->binding = binding;
result->symidx = 0;
result->strent = ebl_strtabadd (ctx->symbol_strtab, name, 0);
/* The value of an ABS symbol must not be modified. Since there are
no subsection and the initial offset of the section is 0 we can
get the alignment recorded by storing it into the offset
field. */
result->offset = value;
if (unlikely (ctx->textp))
/* An absolute symbol can be defined by giving a symbol a
specific value. */
if (binding == STB_GLOBAL)
fprintf (ctx->out.file, "\t.globl %s\n", name);
else if (binding == STB_WEAK)
fprintf (ctx->out.file, "\t.weak %s\n", name);
if (type == STT_OBJECT)
fprintf (ctx->out.file, "\t.type %s,@object\n", name);
else if (type == STT_FUNC)
fprintf (ctx->out.file, "\t.type %s,@function\n", name);
fprintf (ctx->out.file, "%s = %llu\n",
name, (unsigned long long int) value);
if (size != 0)
fprintf (ctx->out.file, "\t.size %s, %llu\n",
name, (unsigned long long int) size);
/* Put the symbol in the hash table so that we can later find it. */
if (asm_symbol_tab_insert (&ctx->symbol_tab, elf_hash (name), result)
!= 0)
/* The symbol already exists. */
__libasm_seterrno (ASM_E_DUPLSYM);
free (result);
result = NULL;
else if (name != NULL && asm_emit_symbol_p (name))
/* Only count non-private symbols. */
rwlock_unlock (ctx->lock);
return result;