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/* MIPS ELF support for BFD.
Copyright (C) 1993, 1994 Free Software Foundation, Inc.
By Ian Lance Taylor, Cygnus Support, <ian@cygnus.com>, from
information in the System V Application Binary Interface, MIPS
Processor Supplement.
This file is part of BFD, the Binary File Descriptor library.
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 of the License, 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., 675 Mass Ave, Cambridge, MA 02139, USA. */
/* This file holds definitions specific to the MIPS ELF ABI. Note
that most of this is not actually implemented by BFD. */
/* Processor specific flags for the ELF header e_flags field. */
/* At least one .noreorder directive appears in the source. */
#define EF_MIPS_NOREORDER 0x00000001
/* File contains position independent code. */
#define EF_MIPS_PIC 0x00000002
/* Code in file uses the standard calling sequence for calling
position independent code. */
#define EF_MIPS_CPIC 0x00000004
/* Four bit MIPS architecture field. */
#define EF_MIPS_ARCH 0xf0000000
/* -mips1 code. */
#define E_MIPS_ARCH_1 0x00000000
/* -mips2 code. */
#define E_MIPS_ARCH_2 0x10000000
/* -mips3 code. */
#define E_MIPS_ARCH_3 0x20000000
/* Processor specific section indices. These sections do not actually
exist. Symbols with a st_shndx field corresponding to one of these
values have a special meaning. */
/* Defined and allocated common symbol. Value is virtual address. If
relocated, alignment must be preserved. */
#define SHN_MIPS_ACOMMON 0xff00
/* Defined and allocated text symbol. Value is virtual address.
Occur in the dynamic symbol table of Alpha OSF/1 and Irix 5 executables. */
#define SHN_MIPS_TEXT 0xff01
/* Defined and allocated data symbol. Value is virtual address.
Occur in the dynamic symbol table of Alpha OSF/1 and Irix 5 executables. */
#define SHN_MIPS_DATA 0xff02
/* Small common symbol. */
#define SHN_MIPS_SCOMMON 0xff03
/* Small undefined symbol. */
#define SHN_MIPS_SUNDEFINED 0xff04
/* Processor specific section types. */
/* Section contains the set of dynamic shared objects used when
statically linking. */
#define SHT_MIPS_LIBLIST 0x70000000
/* I'm not sure what this is, but it's used on Irix 5. */
#define SHT_MIPS_MSYM 0x70000001
/* Section contains list of symbols whose definitions conflict with
symbols defined in shared objects. */
#define SHT_MIPS_CONFLICT 0x70000002
/* Section contains the global pointer table. */
#define SHT_MIPS_GPTAB 0x70000003
/* Section contains microcode information. The exact format is
unspecified. */
#define SHT_MIPS_UCODE 0x70000004
/* Section contains some sort of debugging information. The exact
format is unspecified. It's probably ECOFF symbols. */
#define SHT_MIPS_DEBUG 0x70000005
/* Section contains register usage information. */
#define SHT_MIPS_REGINFO 0x70000006
/* Section contains miscellaneous options (used on Irix). */
#define SHT_MIPS_OPTIONS 0x7000000d
/* DWARF debugging section (used on Irix 6). */
#define SHT_MIPS_DWARF 0x7000001e
/* Events section. This appears on Irix 6. I don't know what it
means. */
#define SHT_MIPS_EVENTS 0x70000021
/* A section of type SHT_MIPS_LIBLIST contains an array of the
following structure. The sh_link field is the section index of the
string table. The sh_info field is the number of entries in the
section. */
typedef struct
{
/* String table index for name of shared object. */
unsigned long l_name;
/* Time stamp. */
unsigned long l_time_stamp;
/* Checksum of symbol names and common sizes. */
unsigned long l_checksum;
/* String table index for version. */
unsigned long l_version;
/* Flags. */
unsigned long l_flags;
} Elf32_Lib;
/* The l_flags field of an Elf32_Lib structure may contain the
following flags. */
/* Require an exact match at runtime. */
#define LL_EXACT_MATCH 0x00000001
/* Ignore version incompatibilities at runtime. */
#define LL_IGNORE_INT_VER 0x00000002
/* A section of type SHT_MIPS_CONFLICT is an array of indices into the
.dynsym section. Each element has the following type. */
typedef unsigned long Elf32_Conflict;
/* A section of type SHT_MIPS_GPTAB contains information about how
much GP space would be required for different -G arguments. This
information is only used so that the linker can provide informative
suggestions as to the best -G value to use. The sh_info field is
the index of the section for which this information applies. The
contents of the section are an array of the following union. The
first element uses the gt_header field. The remaining elements use
the gt_entry field. */
typedef union
{
struct
{
/* -G value actually used for this object file. */
unsigned long gt_current_g_value;
/* Unused. */
unsigned long gt_unused;
} gt_header;
struct
{
/* If this -G argument has been used... */
unsigned long gt_g_value;
/* ...this many GP section bytes would be required. */
unsigned long gt_bytes;
} gt_entry;
} Elf32_gptab;
/* The external version of Elf32_gptab. */
typedef union
{
struct
{
unsigned char gt_current_g_value[4];
unsigned char gt_unused[4];
} gt_header;
struct
{
unsigned char gt_g_value[4];
unsigned char gt_bytes[4];
} gt_entry;
} Elf32_External_gptab;
/* A section of type SHT_MIPS_REGINFO contains the following
structure. */
typedef struct
{
/* Mask of general purpose registers used. */
unsigned long ri_gprmask;
/* Mask of co-processor registers used. */
unsigned long ri_cprmask[4];
/* GP register value for this object file. */
long ri_gp_value;
} Elf32_RegInfo;
/* The external version of the Elf_RegInfo structure. */
typedef struct
{
unsigned char ri_gprmask[4];
unsigned char ri_cprmask[4][4];
unsigned char ri_gp_value[4];
} Elf32_External_RegInfo;
/* MIPS ELF .reginfo swapping routines. */
extern void bfd_mips_elf32_swap_reginfo_in
PARAMS ((bfd *, const Elf32_External_RegInfo *, Elf32_RegInfo *));
extern void bfd_mips_elf32_swap_reginfo_out
PARAMS ((bfd *, const Elf32_RegInfo *, Elf32_External_RegInfo *));
/* Processor specific section flags. */
/* This section must be in the global data area. */
#define SHF_MIPS_GPREL 0x10000000
/* Processor specific program header types. */
/* Register usage information. Identifies one .reginfo section. */
#define PT_MIPS_REGINFO 0x70000000
/* Processor specific dynamic array tags. */
/* 32 bit version number for runtime linker interface. */
#define DT_MIPS_RLD_VERSION 0x70000001
/* Time stamp. */
#define DT_MIPS_TIME_STAMP 0x70000002
/* Checksum of external strings and common sizes. */
#define DT_MIPS_ICHECKSUM 0x70000003
/* Index of version string in string table. */
#define DT_MIPS_IVERSION 0x70000004
/* 32 bits of flags. */
#define DT_MIPS_FLAGS 0x70000005
/* Base address of the segment. */
#define DT_MIPS_BASE_ADDRESS 0x70000006
/* Address of .conflict section. */
#define DT_MIPS_CONFLICT 0x70000008
/* Address of .liblist section. */
#define DT_MIPS_LIBLIST 0x70000009
/* Number of local global offset table entries. */
#define DT_MIPS_LOCAL_GOTNO 0x7000000a
/* Number of entries in the .conflict section. */
#define DT_MIPS_CONFLICTNO 0x7000000b
/* Number of entries in the .liblist section. */
#define DT_MIPS_LIBLISTNO 0x70000010
/* Number of entries in the .dynsym section. */
#define DT_MIPS_SYMTABNO 0x70000011
/* Index of first external dynamic symbol not referenced locally. */
#define DT_MIPS_UNREFEXTNO 0x70000012
/* Index of first dynamic symbol in global offset table. */
#define DT_MIPS_GOTSYM 0x70000013
/* Number of page table entries in global offset table. */
#define DT_MIPS_HIPAGENO 0x70000014
/* Address of run time loader map, used for debugging. */
#define DT_MIPS_RLD_MAP 0x70000016
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