elf.h revision 186191
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: head/sys/mips/include/elf.h 186191 2008-12-16 20:07:47Z imp $ 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#define __ELF_WORD_SIZE 32 /* Used by <sys/elf_generic.h> */ 45#endif 46#include <sys/elf32.h> /* Definitions common to all 32 bit architectures. */ 47#include <sys/elf64.h> /* Definitions common to all 64 bit architectures. */ 48#include <sys/elf_generic.h> 49 50#define ELF_ARCH EM_MIPS 51#define ELF_MACHINE_OK(x) ((x) == EM_MIPS || (x) == EM_MIPS_RS4_BE) 52 53/* Architecture dependent Segment types - p_type */ 54#define PT_MIPS_REGINFO 0x70000000 /* Register usage information */ 55 56/* Architecture dependent d_tag field for Elf32_Dyn. */ 57#define DT_MIPS_RLD_VERSION 0x70000001 /* Runtime Linker Interface ID */ 58#define DT_MIPS_TIME_STAMP 0x70000002 /* Timestamp */ 59#define DT_MIPS_ICHECKSUM 0x70000003 /* Cksum of ext str and com sizes */ 60#define DT_MIPS_IVERSION 0x70000004 /* Version string (string tbl index) */ 61#define DT_MIPS_FLAGS 0x70000005 /* Flags */ 62#define DT_MIPS_BASE_ADDRESS 0x70000006 /* Segment base address */ 63#define DT_MIPS_CONFLICT 0x70000008 /* Adr of .conflict section */ 64#define DT_MIPS_LIBLIST 0x70000009 /* Address of .liblist section */ 65#define DT_MIPS_LOCAL_GOTNO 0x7000000a /* Number of local .GOT entries */ 66#define DT_MIPS_CONFLICTNO 0x7000000b /* Number of .conflict entries */ 67#define DT_MIPS_LIBLISTNO 0x70000010 /* Number of .liblist entries */ 68#define DT_MIPS_SYMTABNO 0x70000011 /* Number of .dynsym entries */ 69#define DT_MIPS_UNREFEXTNO 0x70000012 /* First external DYNSYM */ 70#define DT_MIPS_GOTSYM 0x70000013 /* First GOT entry in .dynsym */ 71#define DT_MIPS_HIPAGENO 0x70000014 /* Number of GOT page table entries */ 72#define DT_MIPS_RLD_MAP 0x70000016 /* Address of debug map pointer */ 73 74#define DT_PROCNUM (DT_MIPS_RLD_MAP - DT_LOPROC + 1) 75 76/* 77 * Legal values for e_flags field of Elf32_Ehdr. 78 */ 79#define EF_MIPS_NOREORDER 1 /* .noreorder was used */ 80#define EF_MIPS_PIC 2 /* Contains PIC code */ 81#define EF_MIPS_CPIC 4 /* Uses PIC calling sequence */ 82#define EF_MIPS_ARCH 0xf0000000 /* MIPS architecture level */ 83 84/* 85 * Mips special sections. 86 */ 87#define SHN_MIPS_ACOMMON 0xff00 /* Allocated common symbols */ 88#define SHN_MIPS_SCOMMON 0xff03 /* Small common symbols */ 89#define SHN_MIPS_SUNDEFINED 0xff04 /* Small undefined symbols */ 90 91/* 92 * Legal values for sh_type field of Elf32_Shdr. 93 */ 94#define SHT_MIPS_LIBLIST 0x70000000 /* Shared objects used in link */ 95#define SHT_MIPS_CONFLICT 0x70000002 /* Conflicting symbols */ 96#define SHT_MIPS_GPTAB 0x70000003 /* Global data area sizes */ 97#define SHT_MIPS_UCODE 0x70000004 /* Reserved for SGI/MIPS compilers */ 98#define SHT_MIPS_DEBUG 0x70000005 /* MIPS ECOFF debugging information */ 99#define SHT_MIPS_REGINFO 0x70000006 /* Register usage information */ 100 101/* 102 * Legal values for sh_flags field of Elf32_Shdr. 103 */ 104#define SHF_MIPS_GPREL 0x10000000 /* Must be part of global data area */ 105 106/* 107 * Entries found in sections of type SHT_MIPS_GPTAB. 108 */ 109typedef union { 110 struct { 111 Elf32_Word gt_current_g_value; /* -G val used in compilation */ 112 Elf32_Word gt_unused; /* Not used */ 113 } gt_header; /* First entry in section */ 114 struct { 115 Elf32_Word gt_g_value; /* If this val were used for -G */ 116 Elf32_Word gt_bytes; /* This many bytes would be used */ 117 } gt_entry; /* Subsequent entries in section */ 118} Elf32_gptab; 119typedef union { 120 struct { 121 Elf64_Word gt_current_g_value; /* -G val used in compilation */ 122 Elf64_Word gt_unused; /* Not used */ 123 } gt_header; /* First entry in section */ 124 struct { 125 Elf64_Word gt_g_value; /* If this val were used for -G */ 126 Elf64_Word gt_bytes; /* This many bytes would be used */ 127 } gt_entry; /* Subsequent entries in section */ 128} Elf64_gptab; 129 130/* 131 * Entry found in sections of type SHT_MIPS_REGINFO. 132 */ 133typedef struct { 134 Elf32_Word ri_gprmask; /* General registers used */ 135 Elf32_Word ri_cprmask[4]; /* Coprocessor registers used */ 136 Elf32_Sword ri_gp_value; /* $gp register value */ 137} Elf32_RegInfo; 138typedef struct { 139 Elf64_Word ri_gprmask; /* General registers used */ 140 Elf64_Word ri_cprmask[4]; /* Coprocessor registers used */ 141 Elf64_Sword ri_gp_value; /* $gp register value */ 142} Elf64_RegInfo; 143 144 145/* 146 * Mips relocations. 147 */ 148 149#define R_MIPS_NONE 0 /* No reloc */ 150#define R_MIPS_16 1 /* Direct 16 bit */ 151#define R_MIPS_32 2 /* Direct 32 bit */ 152#define R_MIPS_REL32 3 /* PC relative 32 bit */ 153#define R_MIPS_26 4 /* Direct 26 bit shifted */ 154#define R_MIPS_HI16 5 /* High 16 bit */ 155#define R_MIPS_LO16 6 /* Low 16 bit */ 156#define R_MIPS_GPREL16 7 /* GP relative 16 bit */ 157#define R_MIPS_LITERAL 8 /* 16 bit literal entry */ 158#define R_MIPS_GOT16 9 /* 16 bit GOT entry */ 159#define R_MIPS_PC16 10 /* PC relative 16 bit */ 160#define R_MIPS_CALL16 11 /* 16 bit GOT entry for function */ 161#define R_MIPS_GPREL32 12 /* GP relative 32 bit */ 162#define R_MIPS_GOTHI16 21 /* GOT HI 16 bit */ 163#define R_MIPS_GOTLO16 22 /* GOT LO 16 bit */ 164#define R_MIPS_CALLHI16 30 /* upper 16 bit GOT entry for function */ 165#define R_MIPS_CALLLO16 31 /* lower 16 bit GOT entry for function */ 166 167/* 168 * These are from the 64-bit Irix ELF ABI 169 */ 170#define R_MIPS_SHIFT5 16 171#define R_MIPS_SHIFT6 17 172#define R_MIPS_64 18 173#define R_MIPS_GOT_DISP 19 174#define R_MIPS_GOT_PAGE 20 175#define R_MIPS_GOT_OFST 21 176#define R_MIPS_GOT_HI16 22 177#define R_MIPS_GOT_LO16 23 178#define R_MIPS_SUB 24 179#define R_MIPS_INSERT_A 25 180#define R_MIPS_INSERT_B 26 181#define R_MIPS_DELETE 27 182#define R_MIPS_HIGHER 28 183#define R_MIPS_HIGHEST 29 184#define R_MIPS_SCN_DISP 32 185#define R_MIPS_REL16 33 186#define R_MIPS_ADD_IMMEDIATE 34 187#define R_MIPS_PJUMP 35 188#define R_MIPS_ERLGOT 36 189 190#define R_MIPS_max 37 191#define R_TYPE(name) __CONCAT(R_MIPS_,name) 192 193/* Define "machine" characteristics */ 194#if __ELF_WORD_SIZE == 32 195#define ELF_TARG_CLASS ELFCLASS32 196#else 197#define ELF_TARG_CLASS ELFCLASS64 198#endif 199#ifdef __MIPSEB__ 200#define ELF_TARG_DATA ELFDATA2MSB 201#else 202#define ELF_TARG_DATA ELFDATA2LSB 203#endif 204#define ELF_TARG_MACH EM_MIPS 205#define ELF_TARG_VER 1 206 207/* 208 * Auxiliary vector entries for passing information to the interpreter. 209 * 210 * The i386 supplement to the SVR4 ABI specification names this "auxv_t", 211 * but POSIX lays claim to all symbols ending with "_t". 212 */ 213typedef struct { /* Auxiliary vector entry on initial stack */ 214 int a_type; /* Entry type. */ 215 union { 216 int a_val; /* Integer value. */ 217 void *a_ptr; /* Address. */ 218 void (*a_fcn)(void); /* Function pointer (not used). */ 219 } a_un; 220} Elf32_Auxinfo; 221 222typedef struct { /* Auxiliary vector entry on initial stack */ 223 long a_type; /* Entry type. */ 224 union { 225 long a_val; /* Integer value. */ 226 void *a_ptr; /* Address. */ 227 void (*a_fcn)(void); /* Function pointer (not used). */ 228 } a_un; 229} Elf64_Auxinfo; 230 231__ElfType(Auxinfo); 232 233/* Values for a_type. */ 234#define AT_NULL 0 /* Terminates the vector. */ 235#define AT_IGNORE 1 /* Ignored entry. */ 236#define AT_EXECFD 2 /* File descriptor of program to load. */ 237#define AT_PHDR 3 /* Program header of program already loaded. */ 238#define AT_PHENT 4 /* Size of each program header entry. */ 239#define AT_PHNUM 5 /* Number of program header entries. */ 240#define AT_PAGESZ 6 /* Page size in bytes. */ 241#define AT_BASE 7 /* Interpreter's base address. */ 242#define AT_FLAGS 8 /* Flags (unused for i386). */ 243#define AT_ENTRY 9 /* Where interpreter should transfer control. */ 244 245/* 246 * The following non-standard values are used for passing information 247 * from John Polstra's testbed program to the dynamic linker. These 248 * are expected to go away soon. 249 * 250 * Unfortunately, these overlap the Linux non-standard values, so they 251 * must not be used in the same context. 252 */ 253#define AT_BRK 10 /* Starting point for sbrk and brk. */ 254#define AT_DEBUG 11 /* Debugging level. */ 255 256/* 257 * The following non-standard values are used in Linux ELF binaries. 258 */ 259#define AT_NOTELF 10 /* Program is not ELF ?? */ 260#define AT_UID 11 /* Real uid. */ 261#define AT_EUID 12 /* Effective uid. */ 262#define AT_GID 13 /* Real gid. */ 263#define AT_EGID 14 /* Effective gid. */ 264 265#define AT_COUNT 15 /* Count of defined aux entry types. */ 266 267#endif /* !_MACHINE_ELF_H_ */ 268