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_TILEPRO 188 34 #define EM_TILEGX 191 35 36 /* Provide a nominal data structure. */ 37 #define ELF_NFPREG 0 38 typedef double elf_fpreg_t; 39 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; 40 41 #ifdef __tilegx__ 42 #define ELF_CLASS ELFCLASS64 43 #else 44 #define ELF_CLASS ELFCLASS32 45 #endif 46 #ifdef __BIG_ENDIAN__ 47 #define ELF_DATA ELFDATA2MSB 48 #else 49 #define ELF_DATA ELFDATA2LSB 50 #endif 51 52 /* 53 * There seems to be a bug in how compat_binfmt_elf.c works: it 54 * #undefs ELF_ARCH, but it is then used in binfmt_elf.c for fill_note_info(). 55 * Hack around this by providing an enum value of ELF_ARCH. 56 */ 57 enum { ELF_ARCH = CHIP_ELF_TYPE() }; 58 #define ELF_ARCH ELF_ARCH 59 60 /* 61 * This is used to ensure we don't load something for the wrong architecture. 62 */ 63 #define elf_check_arch(x) \ 64 ((x)->e_ident[EI_CLASS] == ELF_CLASS && \ 65 (x)->e_ident[EI_DATA] == ELF_DATA && \ 66 (x)->e_machine == CHIP_ELF_TYPE()) 67 68 /* The module loader only handles a few relocation types. */ 69 #ifndef __tilegx__ 70 #define R_TILE_32 1 71 #define R_TILE_JOFFLONG_X1 15 72 #define R_TILE_IMM16_X0_LO 25 73 #define R_TILE_IMM16_X1_LO 26 74 #define R_TILE_IMM16_X0_HA 29 75 #define R_TILE_IMM16_X1_HA 30 76 #else 77 #define R_TILEGX_64 1 78 #define R_TILEGX_JUMPOFF_X1 21 79 #define R_TILEGX_IMM16_X0_HW0 36 80 #define R_TILEGX_IMM16_X1_HW0 37 81 #define R_TILEGX_IMM16_X0_HW1 38 82 #define R_TILEGX_IMM16_X1_HW1 39 83 #define R_TILEGX_IMM16_X0_HW2_LAST 48 84 #define R_TILEGX_IMM16_X1_HW2_LAST 49 85 #endif 86 87 /* Use standard page size for core dumps. */ 88 #define ELF_EXEC_PAGESIZE PAGE_SIZE 89 90 /* 91 * This is the location that an ET_DYN program is loaded if exec'ed. Typical 92 * use of this is to invoke "./ld.so someprog" to test out a new version of 93 * the loader. We need to make sure that it is out of the way of the program 94 * that it will "exec", and that there is sufficient room for the brk. 95 */ 96 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 97 98 #define ELF_CORE_COPY_REGS(_dest, _regs) \ 99 memcpy((char *) &_dest, (char *) _regs, \ 100 sizeof(struct pt_regs)); 101 102 /* No additional FP registers to copy. */ 103 #define ELF_CORE_COPY_FPREGS(t, fpu) 0 104 105 /* 106 * This yields a mask that user programs can use to figure out what 107 * instruction set this CPU supports. This could be done in user space, 108 * but it's not easy, and we've already done it here. 109 */ 110 #define ELF_HWCAP (0) 111 112 /* 113 * This yields a string that ld.so will use to load implementation 114 * specific libraries for optimization. This is more specific in 115 * intent than poking at uname or /proc/cpuinfo. 116 */ 117 #define ELF_PLATFORM (NULL) 118 119 extern void elf_plat_init(struct pt_regs *regs, unsigned long load_addr); 120 121 #define ELF_PLAT_INIT(_r, load_addr) elf_plat_init(_r, load_addr) 122 123 extern int dump_task_regs(struct task_struct *, elf_gregset_t *); 124 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs) 125 126 /* Tilera Linux has no personalities currently, so no need to do anything. */ 127 #define SET_PERSONALITY(ex) do { } while (0) 128 129 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 130 /* Support auto-mapping of the user interrupt vectors. */ 131 struct linux_binprm; 132 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 133 int executable_stack); 134 #define ARCH_DLINFO \ 135 do { \ 136 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE); \ 137 } while (0) 138 139 struct mm_struct; 140 extern unsigned long arch_randomize_brk(struct mm_struct *mm); 141 #define arch_randomize_brk arch_randomize_brk 142 143 #ifdef CONFIG_COMPAT 144 145 #define COMPAT_ELF_PLATFORM "tilegx-m32" 146 147 /* 148 * "Compat" binaries have the same machine type, but 32-bit class, 149 * since they're not a separate machine type, but just a 32-bit 150 * variant of the standard 64-bit architecture. 151 */ 152 #define compat_elf_check_arch(x) \ 153 ((x)->e_ident[EI_CLASS] == ELFCLASS32 && \ 154 (x)->e_machine == CHIP_ELF_TYPE()) 155 156 #define compat_start_thread(regs, ip, usp) do { \ 157 regs->pc = ptr_to_compat_reg((void *)(ip)); \ 158 regs->sp = ptr_to_compat_reg((void *)(usp)); \ 159 single_step_execve(); \ 160 } while (0) 161 162 /* 163 * Use SET_PERSONALITY to indicate compatibility via TS_COMPAT. 164 */ 165 #undef SET_PERSONALITY 166 #define SET_PERSONALITY(ex) \ 167 do { \ 168 set_personality(PER_LINUX | (current->personality & (~PER_MASK))); \ 169 current_thread_info()->status &= ~TS_COMPAT; \ 170 } while (0) 171 #define COMPAT_SET_PERSONALITY(ex) \ 172 do { \ 173 set_personality(PER_LINUX | (current->personality & (~PER_MASK))); \ 174 current_thread_info()->status |= TS_COMPAT; \ 175 } while (0) 176 177 #define COMPAT_ELF_ET_DYN_BASE (0xffffffff / 3 * 2) 178 179 #endif /* CONFIG_COMPAT */ 180 181 #define CORE_DUMP_USE_REGSET 182 183 #endif /* _ASM_TILE_ELF_H */ 184