1/* $OpenBSD: elf_abi.h,v 1.1 1998/01/28 11:14:41 pefo Exp $ */ 2 3/*- 4 * Copyright (c) 1996 Per Fogelstrom 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. All advertising materials mentioning features or use of this software 15 * must display the following acknowledgement: 16 * This product includes software developed under OpenBSD by 17 * Per Fogelstrom. 18 * 4. The name of the author may not be used to endorse or promote products 19 * derived from this software without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 22 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 23 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 25 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * JNPR: elf.h,v 1.4 2006/12/02 09:53:40 katta 34 * $FreeBSD$ 35 * 36 */ 37 38#ifndef _MACHINE_ELF_H_ 39#define _MACHINE_ELF_H_ 40 41/* Information taken from MIPS ABI supplemental */ 42 43#ifndef __ELF_WORD_SIZE 44#if defined(__mips_n64) 45#define __ELF_WORD_SIZE 64 /* Used by <sys/elf_generic.h> */ 46#else 47#define __ELF_WORD_SIZE 32 /* Used by <sys/elf_generic.h> */ 48#endif 49#endif 50#include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */ 51#include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */ 52#include <sys/elf_generic.h> 53 54#define ELF_ARCH EM_MIPS 55#define ELF_MACHINE_OK(x) ((x) == EM_MIPS || (x) == EM_MIPS_RS4_BE) 56 57/* Architecture dependent Segment types - p_type */ 58#define PT_MIPS_REGINFO 0x70000000 /* Register usage information */ 59 60/* Architecture dependent d_tag field for Elf32_Dyn. */ 61#define DT_MIPS_RLD_VERSION 0x70000001 /* Runtime Linker Interface ID */ 62#define DT_MIPS_TIME_STAMP 0x70000002 /* Timestamp */ 63#define DT_MIPS_ICHECKSUM 0x70000003 /* Cksum of ext str and com sizes */ 64#define DT_MIPS_IVERSION 0x70000004 /* Version string (string tbl index) */ 65#define DT_MIPS_FLAGS 0x70000005 /* Flags */ 66#define DT_MIPS_BASE_ADDRESS 0x70000006 /* Segment base address */ 67#define DT_MIPS_CONFLICT 0x70000008 /* Adr of .conflict section */ 68#define DT_MIPS_LIBLIST 0x70000009 /* Address of .liblist section */ 69#define DT_MIPS_LOCAL_GOTNO 0x7000000a /* Number of local .GOT entries */ 70#define DT_MIPS_CONFLICTNO 0x7000000b /* Number of .conflict entries */ 71#define DT_MIPS_LIBLISTNO 0x70000010 /* Number of .liblist entries */ 72#define DT_MIPS_SYMTABNO 0x70000011 /* Number of .dynsym entries */ 73#define DT_MIPS_UNREFEXTNO 0x70000012 /* First external DYNSYM */ 74#define DT_MIPS_GOTSYM 0x70000013 /* First GOT entry in .dynsym */ 75#define DT_MIPS_HIPAGENO 0x70000014 /* Number of GOT page table entries */ 76#define DT_MIPS_RLD_MAP 0x70000016 /* Address of debug map pointer */ 77 78#define DT_PROCNUM (DT_MIPS_RLD_MAP - DT_LOPROC + 1) 79 80/* 81 * Legal values for e_flags field of Elf32_Ehdr. 82 */ 83#define EF_MIPS_NOREORDER 1 /* .noreorder was used */ 84#define EF_MIPS_PIC 2 /* Contains PIC code */ 85#define EF_MIPS_CPIC 4 /* Uses PIC calling sequence */ 86#define EF_MIPS_ARCH 0xf0000000 /* MIPS architecture level */ 87 88/* 89 * Mips special sections. 90 */ 91#define SHN_MIPS_ACOMMON 0xff00 /* Allocated common symbols */ 92#define SHN_MIPS_SCOMMON 0xff03 /* Small common symbols */ 93#define SHN_MIPS_SUNDEFINED 0xff04 /* Small undefined symbols */ 94 95/* 96 * Legal values for sh_type field of Elf32_Shdr. 97 */ 98#define SHT_MIPS_LIBLIST 0x70000000 /* Shared objects used in link */ 99#define SHT_MIPS_CONFLICT 0x70000002 /* Conflicting symbols */ 100#define SHT_MIPS_GPTAB 0x70000003 /* Global data area sizes */ 101#define SHT_MIPS_UCODE 0x70000004 /* Reserved for SGI/MIPS compilers */ 102#define SHT_MIPS_DEBUG 0x70000005 /* MIPS ECOFF debugging information */ 103#define SHT_MIPS_REGINFO 0x70000006 /* Register usage information */ 104 105/* 106 * Legal values for sh_flags field of Elf32_Shdr. 107 */ 108#define SHF_MIPS_GPREL 0x10000000 /* Must be part of global data area */ 109 110/* 111 * Entries found in sections of type SHT_MIPS_GPTAB. 112 */ 113typedef union { 114 struct { 115 Elf32_Word gt_current_g_value; /* -G val used in compilation */ 116 Elf32_Word gt_unused; /* Not used */ 117 } gt_header; /* First entry in section */ 118 struct { 119 Elf32_Word gt_g_value; /* If this val were used for -G */ 120 Elf32_Word gt_bytes; /* This many bytes would be used */ 121 } gt_entry; /* Subsequent entries in section */ 122} Elf32_gptab; 123typedef union { 124 struct { 125 Elf64_Word gt_current_g_value; /* -G val used in compilation */ 126 Elf64_Word gt_unused; /* Not used */ 127 } gt_header; /* First entry in section */ 128 struct { 129 Elf64_Word gt_g_value; /* If this val were used for -G */ 130 Elf64_Word gt_bytes; /* This many bytes would be used */ 131 } gt_entry; /* Subsequent entries in section */ 132} Elf64_gptab; 133 134/* 135 * Entry found in sections of type SHT_MIPS_REGINFO. 136 */ 137typedef struct { 138 Elf32_Word ri_gprmask; /* General registers used */ 139 Elf32_Word ri_cprmask[4]; /* Coprocessor registers used */ 140 Elf32_Sword ri_gp_value; /* $gp register value */ 141} Elf32_RegInfo; 142typedef struct { 143 Elf64_Word ri_gprmask; /* General registers used */ 144 Elf64_Word ri_cprmask[4]; /* Coprocessor registers used */ 145 Elf64_Sword ri_gp_value; /* $gp register value */ 146} Elf64_RegInfo; 147 148 149/* 150 * Mips relocations. 151 */ 152 153#define R_MIPS_NONE 0 /* No reloc */ 154#define R_MIPS_16 1 /* Direct 16 bit */ 155#define R_MIPS_32 2 /* Direct 32 bit */ 156#define R_MIPS_REL32 3 /* PC relative 32 bit */ 157#define R_MIPS_26 4 /* Direct 26 bit shifted */ 158#define R_MIPS_HI16 5 /* High 16 bit */ 159#define R_MIPS_LO16 6 /* Low 16 bit */ 160#define R_MIPS_GPREL16 7 /* GP relative 16 bit */ 161#define R_MIPS_LITERAL 8 /* 16 bit literal entry */ 162#define R_MIPS_GOT16 9 /* 16 bit GOT entry */ 163#define R_MIPS_PC16 10 /* PC relative 16 bit */ 164#define R_MIPS_CALL16 11 /* 16 bit GOT entry for function */ 165#define R_MIPS_GPREL32 12 /* GP relative 32 bit */ 166#define R_MIPS_GOTHI16 21 /* GOT HI 16 bit */ 167#define R_MIPS_GOTLO16 22 /* GOT LO 16 bit */ 168#define R_MIPS_CALLHI16 30 /* upper 16 bit GOT entry for function */ 169#define R_MIPS_CALLLO16 31 /* lower 16 bit GOT entry for function */ 170 171/* 172 * These are from the 64-bit Irix ELF ABI 173 */ 174#define R_MIPS_SHIFT5 16 175#define R_MIPS_SHIFT6 17 176#define R_MIPS_64 18 177#define R_MIPS_GOT_DISP 19 178#define R_MIPS_GOT_PAGE 20 179#define R_MIPS_GOT_OFST 21 180#define R_MIPS_GOT_HI16 22 181#define R_MIPS_GOT_LO16 23 182#define R_MIPS_SUB 24 183#define R_MIPS_INSERT_A 25 184#define R_MIPS_INSERT_B 26 185#define R_MIPS_DELETE 27 186#define R_MIPS_HIGHER 28 187#define R_MIPS_HIGHEST 29 188#define R_MIPS_SCN_DISP 32 189#define R_MIPS_REL16 33 190#define R_MIPS_ADD_IMMEDIATE 34 191#define R_MIPS_PJUMP 35 192#define R_MIPS_ERLGOT 36 193 194#define R_MIPS_max 37 195#define R_TYPE(name) __CONCAT(R_MIPS_,name) 196 197/* Define "machine" characteristics */ 198#if __ELF_WORD_SIZE == 32 199#define ELF_TARG_CLASS ELFCLASS32 200#else 201#define ELF_TARG_CLASS ELFCLASS64 202#endif 203#ifdef __MIPSEB__ 204#define ELF_TARG_DATA ELFDATA2MSB 205#else 206#define ELF_TARG_DATA ELFDATA2LSB 207#endif 208#define ELF_TARG_MACH EM_MIPS 209#define ELF_TARG_VER 1 210 211/* 212 * Auxiliary vector entries for passing information to the interpreter. 213 * 214 * The i386 supplement to the SVR4 ABI specification names this "auxv_t", 215 * but POSIX lays claim to all symbols ending with "_t". 216 */ 217typedef struct { /* Auxiliary vector entry on initial stack */ 218 int a_type; /* Entry type. */ 219 union { 220 int a_val; /* Integer value. */ 221 void *a_ptr; /* Address. */ 222 void (*a_fcn)(void); /* Function pointer (not used). */ 223 } a_un; 224} Elf32_Auxinfo; 225 226typedef struct { /* Auxiliary vector entry on initial stack */ 227 long a_type; /* Entry type. */ 228 union { 229 long a_val; /* Integer value. */ 230 void *a_ptr; /* Address. */ 231 void (*a_fcn)(void); /* Function pointer (not used). */ 232 } a_un; 233} Elf64_Auxinfo; 234 235__ElfType(Auxinfo); 236 237/* Values for a_type. */ 238#define AT_NULL 0 /* Terminates the vector. */ 239#define AT_IGNORE 1 /* Ignored entry. */ 240#define AT_EXECFD 2 /* File descriptor of program to load. */ 241#define AT_PHDR 3 /* Program header of program already loaded. */ 242#define AT_PHENT 4 /* Size of each program header entry. */ 243#define AT_PHNUM 5 /* Number of program header entries. */ 244#define AT_PAGESZ 6 /* Page size in bytes. */ 245#define AT_BASE 7 /* Interpreter's base address. */ 246#define AT_FLAGS 8 /* Flags (unused for i386). */ 247#define AT_ENTRY 9 /* Where interpreter should transfer control. */ 248#define AT_NOTELF 10 /* Program is not ELF ?? */ 249#define AT_UID 11 /* Real uid. */ 250#define AT_EUID 12 /* Effective uid. */ 251#define AT_GID 13 /* Real gid. */ 252#define AT_EGID 14 /* Effective gid. */ 253#define AT_EXECPATH 15 /* Path to the executable. */ 254#define AT_CANARY 16 /* Canary for SSP */ 255#define AT_CANARYLEN 17 /* Length of the canary. */ 256#define AT_OSRELDATE 18 /* OSRELDATE. */ 257#define AT_NCPUS 19 /* Number of CPUs. */ 258#define AT_PAGESIZES 20 /* Pagesizes. */ 259#define AT_PAGESIZESLEN 21 /* Number of pagesizes. */ 260#define AT_TIMEKEEP 22 /* Pointer to timehands. */ 261#define AT_STACKPROT 23 /* Initial stack protection. */ 262 263#define AT_COUNT 24 /* Count of defined aux entry types. */ 264 265#define ET_DYN_LOAD_ADDR 0x0120000 266 267/* 268 * Constant to mark start of symtab/strtab saved by trampoline 269 */ 270#define SYMTAB_MAGIC 0x64656267 271 272#endif /* !_MACHINE_ELF_H_ */ 273