1 /* 2 * Copyright 2010 Tilera Corporation. All Rights Reserved. 3 * 4 * This program is free software; you can redistribute it and/or 5 * modify it under the terms of the GNU General Public License 6 * as published by the Free Software Foundation, version 2. 7 * 8 * This program is distributed in the hope that it will be useful, but 9 * WITHOUT ANY WARRANTY; without even the implied warranty of 10 * MERCHANTABILITY OR FITNESS FOR A PARTICULAR PURPOSE, GOOD TITLE or 11 * NON INFRINGEMENT. See the GNU General Public License for 12 * more details. 13 */ 14 15 #ifndef _ASM_TILE_ELF_H 16 #define _ASM_TILE_ELF_H 17 18 /* 19 * ELF register definitions. 20 */ 21 22 #include <arch/chip.h> 23 24 #include <linux/ptrace.h> 25 #include <asm/byteorder.h> 26 #include <asm/page.h> 27 28 typedef unsigned long elf_greg_t; 29 30 #define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t)) 31 typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 32 33 #define EM_TILE64 187 34 #define EM_TILEPRO 188 35 #define EM_TILEGX 191 36 37 /* Provide a nominal data structure. */ 38 #define ELF_NFPREG 0 39 typedef double elf_fpreg_t; 40 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; 41 42 #ifdef __tilegx__ 43 #define ELF_CLASS ELFCLASS64 44 #else 45 #define ELF_CLASS ELFCLASS32 46 #endif 47 #ifdef __BIG_ENDIAN__ 48 #define ELF_DATA ELFDATA2MSB 49 #else 50 #define ELF_DATA ELFDATA2LSB 51 #endif 52 53 /* 54 * There seems to be a bug in how compat_binfmt_elf.c works: it 55 * #undefs ELF_ARCH, but it is then used in binfmt_elf.c for fill_note_info(). 56 * Hack around this by providing an enum value of ELF_ARCH. 57 */ 58 enum { ELF_ARCH = CHIP_ELF_TYPE() }; 59 #define ELF_ARCH ELF_ARCH 60 61 /* 62 * This is used to ensure we don't load something for the wrong architecture. 63 */ 64 #define elf_check_arch(x) \ 65 ((x)->e_ident[EI_CLASS] == ELF_CLASS && \ 66 (x)->e_ident[EI_DATA] == ELF_DATA && \ 67 (x)->e_machine == CHIP_ELF_TYPE()) 68 69 /* The module loader only handles a few relocation types. */ 70 #ifndef __tilegx__ 71 #define R_TILE_32 1 72 #define R_TILE_JOFFLONG_X1 15 73 #define R_TILE_IMM16_X0_LO 25 74 #define R_TILE_IMM16_X1_LO 26 75 #define R_TILE_IMM16_X0_HA 29 76 #define R_TILE_IMM16_X1_HA 30 77 #else 78 #define R_TILEGX_64 1 79 #define R_TILEGX_JUMPOFF_X1 21 80 #define R_TILEGX_IMM16_X0_HW0 36 81 #define R_TILEGX_IMM16_X1_HW0 37 82 #define R_TILEGX_IMM16_X0_HW1 38 83 #define R_TILEGX_IMM16_X1_HW1 39 84 #define R_TILEGX_IMM16_X0_HW2_LAST 48 85 #define R_TILEGX_IMM16_X1_HW2_LAST 49 86 #endif 87 88 /* Use standard page size for core dumps. */ 89 #define ELF_EXEC_PAGESIZE PAGE_SIZE 90 91 /* 92 * This is the location that an ET_DYN program is loaded if exec'ed. Typical 93 * use of this is to invoke "./ld.so someprog" to test out a new version of 94 * the loader. We need to make sure that it is out of the way of the program 95 * that it will "exec", and that there is sufficient room for the brk. 96 */ 97 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 98 99 #define ELF_CORE_COPY_REGS(_dest, _regs) \ 100 memcpy((char *) &_dest, (char *) _regs, \ 101 sizeof(struct pt_regs)); 102 103 /* No additional FP registers to copy. */ 104 #define ELF_CORE_COPY_FPREGS(t, fpu) 0 105 106 /* 107 * This yields a mask that user programs can use to figure out what 108 * instruction set this CPU supports. This could be done in user space, 109 * but it's not easy, and we've already done it here. 110 */ 111 #define ELF_HWCAP (0) 112 113 /* 114 * This yields a string that ld.so will use to load implementation 115 * specific libraries for optimization. This is more specific in 116 * intent than poking at uname or /proc/cpuinfo. 117 */ 118 #define ELF_PLATFORM (NULL) 119 120 extern void elf_plat_init(struct pt_regs *regs, unsigned long load_addr); 121 122 #define ELF_PLAT_INIT(_r, load_addr) elf_plat_init(_r, load_addr) 123 124 extern int dump_task_regs(struct task_struct *, elf_gregset_t *); 125 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs) 126 127 /* Tilera Linux has no personalities currently, so no need to do anything. */ 128 #define SET_PERSONALITY(ex) do { } while (0) 129 130 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 131 /* Support auto-mapping of the user interrupt vectors. */ 132 struct linux_binprm; 133 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 134 int executable_stack); 135 #ifdef CONFIG_COMPAT 136 137 #define COMPAT_ELF_PLATFORM "tilegx-m32" 138 139 /* 140 * "Compat" binaries have the same machine type, but 32-bit class, 141 * since they're not a separate machine type, but just a 32-bit 142 * variant of the standard 64-bit architecture. 143 */ 144 #define compat_elf_check_arch(x) \ 145 ((x)->e_ident[EI_CLASS] == ELFCLASS32 && \ 146 (x)->e_machine == CHIP_ELF_TYPE()) 147 148 #define compat_start_thread(regs, ip, usp) do { \ 149 regs->pc = ptr_to_compat_reg((void *)(ip)); \ 150 regs->sp = ptr_to_compat_reg((void *)(usp)); \ 151 single_step_execve(); \ 152 } while (0) 153 154 /* 155 * Use SET_PERSONALITY to indicate compatibility via TS_COMPAT. 156 */ 157 #undef SET_PERSONALITY 158 #define SET_PERSONALITY(ex) \ 159 do { \ 160 set_personality(PER_LINUX | (current->personality & (~PER_MASK))); \ 161 current_thread_info()->status &= ~TS_COMPAT; \ 162 } while (0) 163 #define COMPAT_SET_PERSONALITY(ex) \ 164 do { \ 165 set_personality(PER_LINUX | (current->personality & (~PER_MASK))); \ 166 current_thread_info()->status |= TS_COMPAT; \ 167 } while (0) 168 169 #define COMPAT_ELF_ET_DYN_BASE (0xffffffff / 3 * 2) 170 171 #endif /* CONFIG_COMPAT */ 172 173 #define CORE_DUMP_USE_REGSET 174 175 #endif /* _ASM_TILE_ELF_H */ 176