234 lines
7.3 KiB
C
234 lines
7.3 KiB
C
/* 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
|
||
|
||
/* 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
|
||
|
||
/* 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
|
||
|
||
/* 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;
|
||
|
||
/* 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
|