152 lines
5 KiB
C
152 lines
5 KiB
C
/* MIPS ELF support for BFD.
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Copyright (C) 1993 Free Software Foundation, Inc.
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By Ian Lance Taylor, Cygnus Support, <ian@cygnus.com>, from
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information in the System V Application Binary Interface, MIPS
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Processor Supplement.
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This file is part of BFD, the Binary File Descriptor library.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
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/* This file holds definitions specific to the MIPS ELF ABI. Note
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that most of this is not actually implemented by BFD. */
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/* Processor specific flags for the ELF header e_flags field. */
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/* At least one .noreorder directive appears in the source. */
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#define EF_MIPS_NOREORDER 0x00000001
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/* File contains position independent code. */
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#define EF_MIPS_PIC 0x00000002
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/* Code in file uses the standard calling sequence for calling
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position independent code. */
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#define EF_MIPS_CPIC 0x00000004
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/* Four bit MIPS architecture field. */
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#define EF_MIPS_ARCH 0xf0000000
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/* Processor specific section indices. These sections do not actually
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exist. Symbols with a st_shndx field corresponding to one of these
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values have a special meaning. */
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/* Defined and allocated common symbol. Value is virtual address. If
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relocated, alignment must be preserved. */
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#define SHN_MIPS_ACOMMON 0xff00
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/* Small common symbol. */
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#define SHN_MIPS_SCOMMON 0xff03
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/* Small undefined symbol. */
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#define SHN_MIPS_SUNDEFINED 0xff04
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/* Processor specific section types. */
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/* Section contains the set of dynamic shared objects used when
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statically linking. */
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#define SHT_MIPS_LIBLIST 0x70000000
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/* Section contains list of symbols whose definitions conflict with
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symbols defined in shared objects. */
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#define SHT_MIPS_CONFLICT 0x70000002
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/* Section contains the global pointer table. */
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#define SHT_MIPS_GPTAB 0x70000003
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/* Section contains microcode information. The exact format is
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unspecified. */
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#define SHT_MIPS_UCODE 0x70000004
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/* Section contains some sort of debugging information. The exact
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format is unspecified. It's probably ECOFF symbols. */
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#define SHT_MIPS_DEBUG 0x70000005
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/* Section contains register usage information. */
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#define SHT_MIPS_REGINFO 0x70000006
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/* A section of type SHT_MIPS_LIBLIST contains an array of the
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following structure. The sh_link field is the section index of the
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string table. The sh_info field is the number of entries in the
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section. */
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typedef struct
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{
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/* String table index for name of shared object. */
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Elf32_Word l_name;
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/* Time stamp. */
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Elf32_Word l_time_stamp;
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/* Checksum of symbol names and common sizes. */
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Elf32_Word l_checksum;
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/* String table index for version. */
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Elf32_Word l_version;
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/* Flags. */
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Elf32_Word l_flags;
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} Elf32_Lib;
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/* The l_flags field of an Elf32_Lib structure may contain the
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following flags. */
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/* Require an exact match at runtime. */
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#define LL_EXACT_MATCH 0x00000001
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/* Ignore version incompatibilities at runtime. */
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#define LL_IGNORE_INT_VER 0x00000002
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/* A section of type SHT_MIPS_CONFLICT is an array of indices into the
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.dynsym section. Each element has the following type. */
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typedef Elf32_Addr Elf32_Conflict;
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/* A section of type SHT_MIPS_GPTAB contains information about how
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much GP space would be required for different -G arguments. This
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information is only used so that the linker can provide informative
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suggestions as to the best -G value to use. The sh_info field is
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the index of the section for which this information applies. The
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contents of the section are an array of the following union. The
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first element uses the gt_header field. The remaining elements use
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the gt_entry field. */
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typedef union
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{
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struct
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{
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/* -G value actually used for this object file. */
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Elf32_Word gt_current_g_value;
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/* Unused. */
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Elf32_Word gt_unused;
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} gt_header;
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struct
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{
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/* If this -G argument has been used... */
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Elf32_Word gt_g_value;
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/* ...this many GP section bytes would be required. */
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Elf32_Word gt_bytes;
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} gt_entry;
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} Elf32_gptab;
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/* A section of type SHT_MIPS_REGINFO contains the following
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structure. */
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typedef struct
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{
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/* Mask of general purpose registers used. */
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Elf32_Word ri_gprmask;
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/* Mask of co-processor registers used. */
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Elf32_Word ri_cprmask[4];
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/* GP register value for this object file. */
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Elf32_SWord ri_gp_value;
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} Elf_RegInfo;
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/* Processor specific section flags. */
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/* This section must be in the global data area. */
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define SHF_MIPS_GPREL 0x10000000
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