1 /* SPDX-License-Identifier: GPL-2.0-only */ 2 /* 3 * ELF definitions for the Hexagon architecture 4 * 5 * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved. 6 */ 7 8 #ifndef __ASM_ELF_H 9 #define __ASM_ELF_H 10 11 #include <asm/ptrace.h> 12 #include <asm/user.h> 13 #include <linux/elf-em.h> 14 15 struct elf32_hdr; 16 17 /* 18 * ELF header e_flags defines. 19 */ 20 21 /* should have stuff like "CPU type" and maybe "ABI version", etc */ 22 23 /* Hexagon relocations */ 24 /* V2 */ 25 #define R_HEXAGON_NONE 0 26 #define R_HEXAGON_B22_PCREL 1 27 #define R_HEXAGON_B15_PCREL 2 28 #define R_HEXAGON_B7_PCREL 3 29 #define R_HEXAGON_LO16 4 30 #define R_HEXAGON_HI16 5 31 #define R_HEXAGON_32 6 32 #define R_HEXAGON_16 7 33 #define R_HEXAGON_8 8 34 #define R_HEXAGON_GPREL16_0 9 35 #define R_HEXAGON_GPREL16_1 10 36 #define R_HEXAGON_GPREL16_2 11 37 #define R_HEXAGON_GPREL16_3 12 38 #define R_HEXAGON_HL16 13 39 /* V3 */ 40 #define R_HEXAGON_B13_PCREL 14 41 /* V4 */ 42 #define R_HEXAGON_B9_PCREL 15 43 /* V4 (extenders) */ 44 #define R_HEXAGON_B32_PCREL_X 16 45 #define R_HEXAGON_32_6_X 17 46 /* V4 (extended) */ 47 #define R_HEXAGON_B22_PCREL_X 18 48 #define R_HEXAGON_B15_PCREL_X 19 49 #define R_HEXAGON_B13_PCREL_X 20 50 #define R_HEXAGON_B9_PCREL_X 21 51 #define R_HEXAGON_B7_PCREL_X 22 52 #define R_HEXAGON_16_X 23 53 #define R_HEXAGON_12_X 24 54 #define R_HEXAGON_11_X 25 55 #define R_HEXAGON_10_X 26 56 #define R_HEXAGON_9_X 27 57 #define R_HEXAGON_8_X 28 58 #define R_HEXAGON_7_X 29 59 #define R_HEXAGON_6_X 30 60 /* V2 PIC */ 61 #define R_HEXAGON_32_PCREL 31 62 #define R_HEXAGON_COPY 32 63 #define R_HEXAGON_GLOB_DAT 33 64 #define R_HEXAGON_JMP_SLOT 34 65 #define R_HEXAGON_RELATIVE 35 66 #define R_HEXAGON_PLT_B22_PCREL 36 67 #define R_HEXAGON_GOTOFF_LO16 37 68 #define R_HEXAGON_GOTOFF_HI16 38 69 #define R_HEXAGON_GOTOFF_32 39 70 #define R_HEXAGON_GOT_LO16 40 71 #define R_HEXAGON_GOT_HI16 41 72 #define R_HEXAGON_GOT_32 42 73 #define R_HEXAGON_GOT_16 43 74 75 /* 76 * ELF register definitions.. 77 */ 78 typedef unsigned long elf_greg_t; 79 80 typedef struct user_regs_struct elf_gregset_t; 81 #define ELF_NGREG (sizeof(elf_gregset_t)/sizeof(unsigned long)) 82 83 /* Placeholder */ 84 typedef unsigned long elf_fpregset_t; 85 86 /* 87 * Bypass the whole "regsets" thing for now and use the define. 88 */ 89 90 #if CONFIG_HEXAGON_ARCH_VERSION >= 4 91 #define CS_COPYREGS(DEST,REGS) \ 92 do {\ 93 DEST.cs0 = REGS->cs0;\ 94 DEST.cs1 = REGS->cs1;\ 95 } while (0) 96 #else 97 #define CS_COPYREGS(DEST,REGS) 98 #endif 99 100 #define ELF_CORE_COPY_REGS(DEST, REGS) \ 101 do { \ 102 DEST.r0 = REGS->r00; \ 103 DEST.r1 = REGS->r01; \ 104 DEST.r2 = REGS->r02; \ 105 DEST.r3 = REGS->r03; \ 106 DEST.r4 = REGS->r04; \ 107 DEST.r5 = REGS->r05; \ 108 DEST.r6 = REGS->r06; \ 109 DEST.r7 = REGS->r07; \ 110 DEST.r8 = REGS->r08; \ 111 DEST.r9 = REGS->r09; \ 112 DEST.r10 = REGS->r10; \ 113 DEST.r11 = REGS->r11; \ 114 DEST.r12 = REGS->r12; \ 115 DEST.r13 = REGS->r13; \ 116 DEST.r14 = REGS->r14; \ 117 DEST.r15 = REGS->r15; \ 118 DEST.r16 = REGS->r16; \ 119 DEST.r17 = REGS->r17; \ 120 DEST.r18 = REGS->r18; \ 121 DEST.r19 = REGS->r19; \ 122 DEST.r20 = REGS->r20; \ 123 DEST.r21 = REGS->r21; \ 124 DEST.r22 = REGS->r22; \ 125 DEST.r23 = REGS->r23; \ 126 DEST.r24 = REGS->r24; \ 127 DEST.r25 = REGS->r25; \ 128 DEST.r26 = REGS->r26; \ 129 DEST.r27 = REGS->r27; \ 130 DEST.r28 = REGS->r28; \ 131 DEST.r29 = pt_psp(REGS); \ 132 DEST.r30 = REGS->r30; \ 133 DEST.r31 = REGS->r31; \ 134 DEST.sa0 = REGS->sa0; \ 135 DEST.lc0 = REGS->lc0; \ 136 DEST.sa1 = REGS->sa1; \ 137 DEST.lc1 = REGS->lc1; \ 138 DEST.m0 = REGS->m0; \ 139 DEST.m1 = REGS->m1; \ 140 DEST.usr = REGS->usr; \ 141 DEST.p3_0 = REGS->preds; \ 142 DEST.gp = REGS->gp; \ 143 DEST.ugp = REGS->ugp; \ 144 CS_COPYREGS(DEST,REGS); \ 145 DEST.pc = pt_elr(REGS); \ 146 DEST.cause = pt_cause(REGS); \ 147 DEST.badva = pt_badva(REGS); \ 148 } while (0); 149 150 /* 151 * This is used to ensure we don't load something for the wrong architecture. 152 * Checks the machine and ABI type. 153 */ 154 #define elf_check_arch(hdr) ((hdr)->e_machine == EM_HEXAGON) 155 156 /* 157 * These are used to set parameters in the core dumps. 158 */ 159 #define ELF_CLASS ELFCLASS32 160 #define ELF_DATA ELFDATA2LSB 161 #define ELF_ARCH EM_HEXAGON 162 163 #if CONFIG_HEXAGON_ARCH_VERSION == 2 164 #define ELF_CORE_EFLAGS 0x1 165 #endif 166 167 #if CONFIG_HEXAGON_ARCH_VERSION == 3 168 #define ELF_CORE_EFLAGS 0x2 169 #endif 170 171 #if CONFIG_HEXAGON_ARCH_VERSION == 4 172 #define ELF_CORE_EFLAGS 0x3 173 #endif 174 175 /* 176 * Some architectures have ld.so set up a pointer to a function 177 * to be registered using atexit, to facilitate cleanup. So that 178 * static executables will be well-behaved, we would null the register 179 * in question here, in the pt_regs structure passed. For now, 180 * leave it a null macro. 181 */ 182 #define ELF_PLAT_INIT(regs, load_addr) do { } while (0) 183 184 #define USE_ELF_CORE_DUMP 185 #define CORE_DUMP_USE_REGSET 186 187 /* Hrm is this going to cause problems for changing PAGE_SIZE? */ 188 #define ELF_EXEC_PAGESIZE PAGE_SIZE 189 190 /* 191 * This is the location that an ET_DYN program is loaded if exec'ed. Typical 192 * use of this is to invoke "./ld.so someprog" to test out a new version of 193 * the loader. We need to make sure that it is out of the way of the program 194 * that it will "exec", and that there is sufficient room for the brk. 195 */ 196 #define ELF_ET_DYN_BASE 0x08000000UL 197 198 /* 199 * This yields a mask that user programs can use to figure out what 200 * instruction set this cpu supports. 201 */ 202 #define ELF_HWCAP (0) 203 204 /* 205 * This yields a string that ld.so will use to load implementation 206 * specific libraries for optimization. This is more specific in 207 * intent than poking at uname or /proc/cpuinfo. 208 */ 209 #define ELF_PLATFORM (NULL) 210 211 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1 212 struct linux_binprm; 213 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 214 int uses_interp); 215 216 217 #endif 218