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* sysdeps/mips/elf/ldsodefs.h: Add mips-specific elf64 relocation 

data structures and macros.  Protect from multiple inclusion.
This commit is contained in:
Alexandre Oliva 2003-03-22 15:07:05 +00:00
parent 721e2474d6
commit cfd77e42b8
1 changed files with 85 additions and 1 deletions
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86
sysdeps/mips/elf/ldsodefs.h
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@ -1,5 +1,5 @@
/* Run-time dynamic linker data structures for loaded ELF shared objects.
Copyright (C) 2000, 2002 Free Software Foundation, Inc.
Copyright (C) 2000, 2002, 2003 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
@ -17,9 +17,93 @@
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
02111-1307 USA. */
#ifndef _MIPS_LDSODEFS_H
#define _MIPS_LDSODEFS_H
/* The MIPS ABI specifies that the dynamic section has to be read-only. */
#define DL_RO_DYN_SECTION 1
#include_next <ldsodefs.h>
/* The 64-bit MIPS ELF ABI uses an unusual reloc format. Each
relocation entry specifies up to three actual relocations, all at
the same address. The first relocation which required a symbol
uses the symbol in the r_sym field. The second relocation which
requires a symbol uses the symbol in the r_ssym field. If all
three relocations require a symbol, the third one uses a zero
value.
We define these structures in internal headers because we're not
sure we want to make them part of the ABI yet. Eventually, some of
this may move into elf/elf.h. */
/* An entry in a 64 bit SHT_REL section. */
typedef struct
{
Elf32_Word r_sym; /* Symbol index */
unsigned char r_ssym; /* Special symbol for 2nd relocation */
unsigned char r_type3; /* 3rd relocation type */
unsigned char r_type2; /* 2nd relocation type */
unsigned char r_type1; /* 1st relocation type */
} _Elf64_Mips_R_Info;
typedef union
{
Elf64_Xword r_info_number;
_Elf64_Mips_R_Info r_info_fields;
} _Elf64_Mips_R_Info_union;
typedef struct
{
Elf64_Addr r_offset; /* Address */
_Elf64_Mips_R_Info_union r_info; /* Relocation type and symbol index */
} Elf64_Mips_Rel;
typedef struct
{
Elf64_Addr r_offset; /* Address */
_Elf64_Mips_R_Info_union r_info; /* Relocation type and symbol index */
Elf64_Sxword r_addend; /* Addend */
} Elf64_Mips_Rela;
#define ELF64_MIPS_R_SYM(i) \
((__extension__ (_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_sym)
#define ELF64_MIPS_R_TYPE(i) \
(((_Elf64_Mips_R_Info_union)(i)).r_info_fields.r_type1 \
| ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \
).r_info_fields.r_type2 << 8) \
| ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \
).r_info_fields.r_type3 << 16) \
| ((Elf32_Word)(__extension__ (_Elf64_Mips_R_Info_union)(i) \
).r_info_fields.r_ssym << 24))
#define ELF64_MIPS_R_INFO(sym, type) \
(__extension__ (_Elf64_Mips_R_Info_union) \
(__extension__ (_Elf64_Mips_R_Info) \
{ (sym), ELF64_MIPS_R_SSYM (type), \
ELF64_MIPS_R_TYPE3 (type), \
ELF64_MIPS_R_TYPE2 (type), \
ELF64_MIPS_R_TYPE1 (type) \
}).r_info_number)
/* These macros decompose the value returned by ELF64_MIPS_R_TYPE, and
compose it back into a value that it can be used as an argument to
ELF64_MIPS_R_INFO. */
#define ELF64_MIPS_R_SSYM(i) (((i) >> 24) & 0xff)
#define ELF64_MIPS_R_TYPE3(i) (((i) >> 16) & 0xff)
#define ELF64_MIPS_R_TYPE2(i) (((i) >> 8) & 0xff)
#define ELF64_MIPS_R_TYPE1(i) ((i) & 0xff)
#define ELF64_MIPS_R_TYPEENC(type1, type2, type3, ssym) \
((type1) \
| ((Elf32_Word)(type2) << 8) \
| ((Elf32_Word)(type3) << 16) \
| ((Elf32_Word)(ssym) << 24))
#undef ELF64_R_SYM
#define ELF64_R_SYM(i) ELF64_MIPS_R_SYM (i)
#undef ELF64_R_TYPE
#define ELF64_R_TYPE(i) ELF64_MIPS_R_TYPE (i)
#undef ELF64_R_INFO
#define ELF64_R_INFO(sym, type) ELF64_MIPS_R_INFO ((sym), (type))
#endif