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/* i386 specific symbolic name handling.
Copyright (C) 2000, 2001, 2002, 2005 Red Hat, Inc.
Written by Ulrich Drepper <drepper@redhat.com>, 2000.
This program is Open Source software; you can redistribute it and/or
modify it under the terms of the Open Software License version 1.0 as
published by the Open Source Initiative.
You should have received a copy of the Open Software License along
with this program; if not, you may obtain a copy of the Open Software
License version 1.0 from http://www.opensource.org/licenses/osl.php or
by writing the Open Source Initiative c/o Lawrence Rosen, Esq.,
3001 King Ranch Road, Ukiah, CA 95482. */
#ifdef HAVE_CONFIG_H
# include <config.h>
#endif
#include <assert.h>
#include <elf.h>
#include <stddef.h>
#include <libebl_i386.h>
/* Return of the backend. */
const char *
i386_backend_name (void)
{
return "i386";
}
/* Relocation mapping table. */
static struct
{
const char *name;
enum { both = 0, rel = 1, exec = 2 } appear;
} reloc_map_table[] =
{
[R_386_NONE] = { "R_386_NONE", both },
[R_386_32] = { "R_386_32", both },
[R_386_PC32] = { "R_386_PC32", rel },
[R_386_GOT32] = { "R_386_GOT32", rel },
[R_386_PLT32] = { "R_386_PLT32", rel },
[R_386_COPY] = { "R_386_COPY", exec },
[R_386_GLOB_DAT] = { "R_386_GLOB_DAT", exec },
[R_386_JMP_SLOT] = { "R_386_JMP_SLOT", exec },
[R_386_RELATIVE] = { "R_386_RELATIVE", exec },
[R_386_GOTOFF] = { "R_386_GOTOFF", rel },
[R_386_GOTPC] = { "R_386_GOTPC", rel },
[R_386_32PLT] = { "R_386_32PLT", rel },
[R_386_TLS_TPOFF] = { "R_386_TLS_TPOFF", rel },
[R_386_TLS_IE] = { "R_386_TLS_IE", rel },
[R_386_TLS_GOTIE] = { "R_386_TLS_GOTIE", rel },
[R_386_TLS_LE] = { "R_386_TLS_LE", rel },
[R_386_TLS_GD] = { "R_386_TLS_GD", rel },
[R_386_TLS_LDM] = { "R_386_TLS_LDM", rel },
[R_386_16] = { "R_386_16", rel },
[R_386_PC16] = { "R_386_PC16", rel },
[R_386_8] = { "R_386_8", rel },
[R_386_PC8] = { "R_386_PC8", rel },
[R_386_TLS_GD_32] = { "R_386_TLS_GD_32", rel },
[R_386_TLS_GD_PUSH] = { "R_386_TLS_GD_PUSH", rel },
[R_386_TLS_GD_CALL] = { "R_386_TLS_GD_CALL", rel },
[R_386_TLS_GD_POP] = { "R_386_TLS_GD_POP", rel },
[R_386_TLS_LDM_32] = { "R_386_TLS_LDM_32", rel },
[R_386_TLS_LDM_PUSH] = { "R_386_TLS_LDM_PUSH", rel },
[R_386_TLS_LDM_CALL] = { "R_386_TLS_LDM_CALL", rel },
[R_386_TLS_LDM_POP] = { "R_386_TLS_LDM_POP", rel },
[R_386_TLS_LDO_32] = { "R_386_TLS_LDO_32", rel },
[R_386_TLS_IE_32] = { "R_386_TLS_IE_32", rel },
[R_386_TLS_LE_32] = { "R_386_TLS_LE_32", rel },
[R_386_TLS_DTPMOD32] = { "R_386_TLS_DTPMOD32", rel },
[R_386_TLS_DTPOFF32] = { "R_386_TLS_DTPOFF32", rel },
[R_386_TLS_TPOFF32] = { "R_386_TLS_TPOFF32", rel }
};
/* Determine relocation type string for x86. */
const char *
i386_reloc_type_name (int type, char *buf __attribute__ ((unused)),
size_t len __attribute__ ((unused)))
{
if (type < 0 || type >= R_386_NUM)
return NULL;
return reloc_map_table[type].name;
}
/* Check for correct relocation type. */
bool
i386_reloc_type_check (int type)
{
return (type >= R_386_NONE && type < R_386_NUM
&& reloc_map_table[type].name != NULL) ? true : false;
}
/* Check for correct relocation type use. */
bool
i386_reloc_valid_use (Elf *elf, int type)
{
if (type < R_386_NONE || type >= R_386_NUM
|| reloc_map_table[type].name == NULL)
return false;
Elf32_Ehdr *ehdr = elf32_getehdr (elf);
assert (ehdr != NULL);
if (reloc_map_table[type].appear == rel)
return ehdr->e_type == ET_REL;
if (reloc_map_table[type].appear == exec)
return ehdr->e_type != ET_REL;
assert (reloc_map_table[type].appear == both);
return true;
}
/* Return true if the symbol type is that referencing the GOT. */
bool
i386_gotpc_reloc_check (Elf *elf __attribute__ ((unused)), int type)
{
return type == R_386_GOTPC;
}
/* Check for the simple reloc types. */
Elf_Type
i386_reloc_simple_type (Elf *elf __attribute__ ((unused)), int type)
{
switch (type)
{
case R_386_32:
return ELF_T_SWORD;
case R_386_16:
return ELF_T_HALF;
case R_386_8:
return ELF_T_BYTE;
default:
return ELF_T_NUM;
}
}
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