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/* Copyright (C) 2008 CodeSourcery
Written by Maciej W. Rozycki <macro@codesourcery.com>, 2008.
This program 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; either version 2, or (at your option)
any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software Foundation,
Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include <config.h>
#include "prelink.h"
#include "reloc-info.h"
/* A structure to lay out generic relocation information
* in a way specific to 64-bit MIPS. */
union mips64_r_info
{
/* Generic r_info interpretation. */
Elf64_Xword r_info;
/* 64-bit MIPS r_info interpretation. */
struct
{
/* Symbol index for the first relocation. */
Elf64_Word r_sym;
/* Special symbol for the second relocation. */
Elf64_Byte r_ssym;
/* Third relocation. */
Elf64_Byte r_type3;
/* Second relocation. */
Elf64_Byte r_type2;
/* First relocation. */
Elf64_Byte r_type;
}
s_info;
};
/* Extract the symbol index from 64-bit MIPS reloc info. */
static GElf_Xword
mips64_r_sym (DSO *dso, GElf_Xword r_info)
{
union mips64_r_info mips64_r_info;
buf_write_ne64 (dso, (unsigned char *) &mips64_r_info.r_info, r_info);
return buf_read_une32 (dso, (unsigned char *) &mips64_r_info.s_info.r_sym);
}
/* Extract the special symbol index from 64-bit MIPS reloc info. */
static GElf_Xword
mips64_r_ssym (DSO *dso, GElf_Xword r_info)
{
union mips64_r_info mips64_r_info;
buf_write_ne64 (dso, (unsigned char *) &mips64_r_info.r_info, r_info);
return mips64_r_info.s_info.r_ssym;
}
/* Extract the first reloc type from 64-bit MIPS reloc info. */
static GElf_Xword
mips64_r_type (DSO *dso, GElf_Xword r_info)
{
union mips64_r_info mips64_r_info;
buf_write_ne64 (dso, (unsigned char *) &mips64_r_info.r_info, r_info);
return mips64_r_info.s_info.r_type;
}
/* Extract the second reloc type from 64-bit MIPS reloc info. */
static GElf_Xword
mips64_r_type2 (DSO *dso, GElf_Xword r_info)
{
union mips64_r_info mips64_r_info;
buf_write_ne64 (dso, (unsigned char *) &mips64_r_info.r_info, r_info);
return mips64_r_info.s_info.r_type2;
}
/* Extract the third reloc type from 64-bit MIPS reloc info. */
static GElf_Xword
mips64_r_type3 (DSO *dso, GElf_Xword r_info)
{
union mips64_r_info mips64_r_info;
buf_write_ne64 (dso, (unsigned char *) &mips64_r_info.r_info, r_info);
return mips64_r_info.s_info.r_type3;
}
/* Construct 64-bit MIPS reloc info from symbol indices and reloc types. */
static GElf_Xword
mips64_r_info_ext (DSO *dso, GElf_Word r_sym, Elf64_Byte r_ssym,
Elf64_Byte r_type, Elf64_Byte r_type2, Elf64_Byte r_type3)
{
union mips64_r_info mips64_r_info;
buf_write_ne32 (dso, (unsigned char *) &mips64_r_info.s_info.r_sym, r_sym);
mips64_r_info.s_info.r_ssym = r_ssym;
mips64_r_info.s_info.r_type = r_type;
mips64_r_info.s_info.r_type2 = r_type2;
mips64_r_info.s_info.r_type3 = r_type3;
return buf_read_une64 (dso, (unsigned char *) &mips64_r_info.r_info);
}
/* Extract the symbol index from reloc info. */
GElf_Xword
reloc_r_sym (DSO *dso, GElf_Xword r_info)
{
if (dso->ehdr.e_ident[EI_CLASS] == ELFCLASS64
&& dso->ehdr.e_machine == EM_MIPS)
return mips64_r_sym (dso, r_info);
else
return GELF_R_SYM (r_info);
}
/* Extract the special symbol index from reloc info. */
GElf_Xword
reloc_r_ssym (DSO *dso, GElf_Xword r_info)
{
if (dso->ehdr.e_ident[EI_CLASS] == ELFCLASS64
&& dso->ehdr.e_machine == EM_MIPS)
return mips64_r_ssym (dso, r_info);
else
return RSS_UNDEF;
}
/* Extract the first reloc type from reloc info. */
GElf_Xword
reloc_r_type (DSO *dso, GElf_Xword r_info)
{
if (dso->ehdr.e_ident[EI_CLASS] == ELFCLASS64
&& dso->ehdr.e_machine == EM_MIPS)
return mips64_r_type (dso, r_info);
else
return GELF_R_TYPE (r_info);
}
/* Extract the second reloc type from reloc info. */
GElf_Xword
reloc_r_type2 (DSO *dso, GElf_Xword r_info)
{
if (dso->ehdr.e_ident[EI_CLASS] == ELFCLASS64
&& dso->ehdr.e_machine == EM_MIPS)
return mips64_r_type2 (dso, r_info);
else
return 0;
}
/* Extract the third reloc type from reloc info. */
GElf_Xword
reloc_r_type3 (DSO *dso, GElf_Xword r_info)
{
if (dso->ehdr.e_ident[EI_CLASS] == ELFCLASS64
&& dso->ehdr.e_machine == EM_MIPS)
return mips64_r_type3 (dso, r_info);
else
return 0;
}
/* Construct reloc info from symbol index and reloc type. */
GElf_Xword
reloc_r_info (DSO *dso, GElf_Word r_sym, GElf_Word r_type)
{
if (dso->ehdr.e_ident[EI_CLASS] == ELFCLASS64
&& dso->ehdr.e_machine == EM_MIPS)
switch (r_type)
{
case R_MIPS_REL32:
case R_MIPS_GLOB_DAT:
return mips64_r_info_ext (dso, r_sym, RSS_UNDEF,
r_type, R_MIPS_64, R_MIPS_NONE);
default:
return mips64_r_info_ext (dso, r_sym, RSS_UNDEF,
r_type, R_MIPS_NONE, R_MIPS_NONE);
}
else
return GELF_R_INFO (r_sym, r_type);
}
/* Construct reloc info from symbol index and reloc type. */
GElf_Xword
reloc_r_info_ext (DSO *dso, GElf_Word r_sym, Elf64_Byte r_ssym,
Elf64_Byte r_type, Elf64_Byte r_type2, Elf64_Byte r_type3)
{
if (dso->ehdr.e_ident[EI_CLASS] == ELFCLASS64
&& dso->ehdr.e_machine == EM_MIPS)
return mips64_r_info_ext (dso, r_sym, r_ssym, r_type, r_type2, r_type3);
else
return GELF_R_INFO (r_sym, r_type);
}
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