1/* 2 * ELF definitions for the Hexagon architecture 3 * 4 * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 and 8 * only version 2 as published by the Free Software Foundation. 9 * 10 * This program is distributed in the hope that it will be useful, 11 * but WITHOUT ANY WARRANTY; without even the implied warranty of 12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13 * GNU General Public License for more details. 14 * 15 * You should have received a copy of the GNU General Public License 16 * along with this program; if not, write to the Free Software 17 * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 18 * 02110-1301, USA. 19 */ 20 21#ifndef __ASM_ELF_H 22#define __ASM_ELF_H 23 24#include <asm/ptrace.h> 25#include <asm/user.h> 26 27/* 28 * This should really be in linux/elf-em.h. 29 */ 30#define EM_HEXAGON 164 /* QUALCOMM Hexagon */ 31 32struct elf32_hdr; 33 34/* 35 * ELF header e_flags defines. 36 */ 37 38/* should have stuff like "CPU type" and maybe "ABI version", etc */ 39 40/* Hexagon relocations */ 41 /* V2 */ 42#define R_HEXAGON_NONE 0 43#define R_HEXAGON_B22_PCREL 1 44#define R_HEXAGON_B15_PCREL 2 45#define R_HEXAGON_B7_PCREL 3 46#define R_HEXAGON_LO16 4 47#define R_HEXAGON_HI16 5 48#define R_HEXAGON_32 6 49#define R_HEXAGON_16 7 50#define R_HEXAGON_8 8 51#define R_HEXAGON_GPREL16_0 9 52#define R_HEXAGON_GPREL16_1 10 53#define R_HEXAGON_GPREL16_2 11 54#define R_HEXAGON_GPREL16_3 12 55#define R_HEXAGON_HL16 13 56 /* V3 */ 57#define R_HEXAGON_B13_PCREL 14 58 /* V4 */ 59#define R_HEXAGON_B9_PCREL 15 60 /* V4 (extenders) */ 61#define R_HEXAGON_B32_PCREL_X 16 62#define R_HEXAGON_32_6_X 17 63 /* V4 (extended) */ 64#define R_HEXAGON_B22_PCREL_X 18 65#define R_HEXAGON_B15_PCREL_X 19 66#define R_HEXAGON_B13_PCREL_X 20 67#define R_HEXAGON_B9_PCREL_X 21 68#define R_HEXAGON_B7_PCREL_X 22 69#define R_HEXAGON_16_X 23 70#define R_HEXAGON_12_X 24 71#define R_HEXAGON_11_X 25 72#define R_HEXAGON_10_X 26 73#define R_HEXAGON_9_X 27 74#define R_HEXAGON_8_X 28 75#define R_HEXAGON_7_X 29 76#define R_HEXAGON_6_X 30 77 /* V2 PIC */ 78#define R_HEXAGON_32_PCREL 31 79#define R_HEXAGON_COPY 32 80#define R_HEXAGON_GLOB_DAT 33 81#define R_HEXAGON_JMP_SLOT 34 82#define R_HEXAGON_RELATIVE 35 83#define R_HEXAGON_PLT_B22_PCREL 36 84#define R_HEXAGON_GOTOFF_LO16 37 85#define R_HEXAGON_GOTOFF_HI16 38 86#define R_HEXAGON_GOTOFF_32 39 87#define R_HEXAGON_GOT_LO16 40 88#define R_HEXAGON_GOT_HI16 41 89#define R_HEXAGON_GOT_32 42 90#define R_HEXAGON_GOT_16 43 91 92/* 93 * ELF register definitions.. 94 */ 95typedef unsigned long elf_greg_t; 96 97typedef struct user_regs_struct elf_gregset_t; 98#define ELF_NGREG (sizeof(elf_gregset_t)/sizeof(unsigned long)) 99 100/* Placeholder */ 101typedef unsigned long elf_fpregset_t; 102 103/* 104 * Bypass the whole "regsets" thing for now and use the define. 105 */ 106 107#if CONFIG_HEXAGON_ARCH_VERSION >= 4 108#define CS_COPYREGS(DEST,REGS) \ 109do {\ 110 DEST.cs0 = REGS->cs0;\ 111 DEST.cs1 = REGS->cs1;\ 112} while (0) 113#else 114#define CS_COPYREGS(DEST,REGS) 115#endif 116 117#define ELF_CORE_COPY_REGS(DEST, REGS) \ 118do { \ 119 DEST.r0 = REGS->r00; \ 120 DEST.r1 = REGS->r01; \ 121 DEST.r2 = REGS->r02; \ 122 DEST.r3 = REGS->r03; \ 123 DEST.r4 = REGS->r04; \ 124 DEST.r5 = REGS->r05; \ 125 DEST.r6 = REGS->r06; \ 126 DEST.r7 = REGS->r07; \ 127 DEST.r8 = REGS->r08; \ 128 DEST.r9 = REGS->r09; \ 129 DEST.r10 = REGS->r10; \ 130 DEST.r11 = REGS->r11; \ 131 DEST.r12 = REGS->r12; \ 132 DEST.r13 = REGS->r13; \ 133 DEST.r14 = REGS->r14; \ 134 DEST.r15 = REGS->r15; \ 135 DEST.r16 = REGS->r16; \ 136 DEST.r17 = REGS->r17; \ 137 DEST.r18 = REGS->r18; \ 138 DEST.r19 = REGS->r19; \ 139 DEST.r20 = REGS->r20; \ 140 DEST.r21 = REGS->r21; \ 141 DEST.r22 = REGS->r22; \ 142 DEST.r23 = REGS->r23; \ 143 DEST.r24 = REGS->r24; \ 144 DEST.r25 = REGS->r25; \ 145 DEST.r26 = REGS->r26; \ 146 DEST.r27 = REGS->r27; \ 147 DEST.r28 = REGS->r28; \ 148 DEST.r29 = pt_psp(REGS); \ 149 DEST.r30 = REGS->r30; \ 150 DEST.r31 = REGS->r31; \ 151 DEST.sa0 = REGS->sa0; \ 152 DEST.lc0 = REGS->lc0; \ 153 DEST.sa1 = REGS->sa1; \ 154 DEST.lc1 = REGS->lc1; \ 155 DEST.m0 = REGS->m0; \ 156 DEST.m1 = REGS->m1; \ 157 DEST.usr = REGS->usr; \ 158 DEST.p3_0 = REGS->preds; \ 159 DEST.gp = REGS->gp; \ 160 DEST.ugp = REGS->ugp; \ 161 CS_COPYREGS(DEST,REGS); \ 162 DEST.pc = pt_elr(REGS); \ 163 DEST.cause = pt_cause(REGS); \ 164 DEST.badva = pt_badva(REGS); \ 165} while (0); 166 167/* 168 * This is used to ensure we don't load something for the wrong architecture. 169 * Checks the machine and ABI type. 170 */ 171#define elf_check_arch(hdr) ((hdr)->e_machine == EM_HEXAGON) 172 173/* 174 * These are used to set parameters in the core dumps. 175 */ 176#define ELF_CLASS ELFCLASS32 177#define ELF_DATA ELFDATA2LSB 178#define ELF_ARCH EM_HEXAGON 179 180#if CONFIG_HEXAGON_ARCH_VERSION == 2 181#define ELF_CORE_EFLAGS 0x1 182#endif 183 184#if CONFIG_HEXAGON_ARCH_VERSION == 3 185#define ELF_CORE_EFLAGS 0x2 186#endif 187 188#if CONFIG_HEXAGON_ARCH_VERSION == 4 189#define ELF_CORE_EFLAGS 0x3 190#endif 191 192/* 193 * Some architectures have ld.so set up a pointer to a function 194 * to be registered using atexit, to facilitate cleanup. So that 195 * static executables will be well-behaved, we would null the register 196 * in question here, in the pt_regs structure passed. For now, 197 * leave it a null macro. 198 */ 199#define ELF_PLAT_INIT(regs, load_addr) do { } while (0) 200 201#define USE_ELF_CORE_DUMP 202#define CORE_DUMP_USE_REGSET 203 204/* Hrm is this going to cause problems for changing PAGE_SIZE? */ 205#define ELF_EXEC_PAGESIZE PAGE_SIZE 206 207/* 208 * This is the location that an ET_DYN program is loaded if exec'ed. Typical 209 * use of this is to invoke "./ld.so someprog" to test out a new version of 210 * the loader. We need to make sure that it is out of the way of the program 211 * that it will "exec", and that there is sufficient room for the brk. 212 */ 213#define ELF_ET_DYN_BASE 0x08000000UL 214 215/* 216 * This yields a mask that user programs can use to figure out what 217 * instruction set this cpu supports. 218 */ 219#define ELF_HWCAP (0) 220 221/* 222 * This yields a string that ld.so will use to load implementation 223 * specific libraries for optimization. This is more specific in 224 * intent than poking at uname or /proc/cpuinfo. 225 */ 226#define ELF_PLATFORM (NULL) 227 228#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 229struct linux_binprm; 230extern int arch_setup_additional_pages(struct linux_binprm *bprm, 231 int uses_interp); 232 233 234#endif 235