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/* x86_64 specific symbolic name handling.
Copyright (C) 2002, 2005 Red Hat, Inc.
Written by Ulrich Drepper <drepper@redhat.com>, 2002.
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_x86_64.h>
/* Return of the backend. */
const char *
x86_64_backend_name (void)
{
return "x86-64";
}
/* Relocation mapping table. */
static struct
{
const char *name;
enum { both = 0, rel = 1, exec = 2 } appear;
} reloc_map_table[] =
{
[R_X86_64_NONE] = { "R_X86_64_NONE", both },
[R_X86_64_64] = { "R_X86_64_64", both },
[R_X86_64_PC32] = { "R_X86_64_PC32", rel },
[R_X86_64_GOT32] = { "R_X86_64_GOT32", rel },
[R_X86_64_PLT32] = { "R_X86_64_PLT32", rel },
[R_X86_64_COPY] = { "R_X86_64_COPY", exec },
[R_X86_64_GLOB_DAT] = { "R_X86_64_GLOB_DAT", exec },
[R_X86_64_JUMP_SLOT] = { "R_X86_64_JUMP_SLOT", exec },
[R_X86_64_RELATIVE] = { "R_X86_64_RELATIVE", exec },
[R_X86_64_GOTPCREL] = { "R_X86_64_GOTPCREL", exec },
[R_X86_64_32] = { "R_X86_64_32", both },
[R_X86_64_32S] = { "R_X86_64_32S", rel },
[R_X86_64_16] = { "R_X86_64_16", rel },
[R_X86_64_PC16] = { "R_X86_64_PC16", rel },
[R_X86_64_8] = { "R_X86_64_8", rel },
[R_X86_64_PC8] = { "R_X86_64_PC8", rel },
[R_X86_64_DTPMOD64] = { "R_X86_64_DTPMOD64", rel },
[R_X86_64_DTPOFF64] = { "R_X86_64_DTPOFF64", rel },
[R_X86_64_TPOFF64] = { "R_X86_64_TPOFF64", rel },
[R_X86_64_TLSGD] = { "R_X86_64_TLSGD", rel },
[R_X86_64_TLSLD] = { "R_X86_64_TLSLD", rel },
[R_X86_64_DTPOFF32] = { "R_X86_64_DTPOFF32", rel },
[R_X86_64_GOTTPOFF] = { "R_X86_64_GOTTPOFF", rel },
[R_X86_64_TPOFF32] = { "R_X86_64_TPOFF32", rel }
};
/* Determine relocation type string for x86-64. */
const char *
x86_64_reloc_type_name (int type, char *buf __attribute__ ((unused)),
size_t len __attribute__ ((unused)))
{
if (type < 0 || type >= R_X86_64_NUM)
return NULL;
return reloc_map_table[type].name;
}
/* Check for correct relocation type. */
bool
x86_64_reloc_type_check (int type)
{
return (type >= R_X86_64_NONE && type < R_X86_64_NUM
&& reloc_map_table[type].name != NULL) ? true : false;
}
/* Check for correct relocation type use. */
bool
x86_64_reloc_valid_use (Elf *elf, int type)
{
if (type < R_X86_64_NONE || type >= R_X86_64_NUM
|| reloc_map_table[type].name == NULL)
return false;
Elf64_Ehdr *ehdr = elf64_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;
}
/* Check for the simple reloc types. */
Elf_Type
x86_64_reloc_simple_type (Elf *elf __attribute__ ((unused)), int type)
{
switch (type)
{
case R_X86_64_64:
return ELF_T_XWORD;
case R_X86_64_32:
return ELF_T_WORD;
case R_X86_64_32S:
return ELF_T_SWORD;
case R_X86_64_16:
return ELF_T_HALF;
case R_X86_64_8:
return ELF_T_BYTE;
default:
return ELF_T_NUM;
}
}
/* Check whether given relocation is a copy relocation. */
bool
x86_64_copy_reloc_p (int reloc)
{
return reloc == R_X86_64_COPY;
}
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