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 <linux/elf-em.h> 26 #include <asm/byteorder.h> 27 #include <asm/page.h> 28 29 typedef unsigned long elf_greg_t; 30 31 #define ELF_NGREG (sizeof(struct pt_regs) / sizeof(elf_greg_t)) 32 typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 33 34 /* Provide a nominal data structure. */ 35 #define ELF_NFPREG 0 36 typedef double elf_fpreg_t; 37 typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; 38 39 #ifdef __tilegx__ 40 #define ELF_CLASS ELFCLASS64 41 #else 42 #define ELF_CLASS ELFCLASS32 43 #endif 44 #ifdef __BIG_ENDIAN__ 45 #define ELF_DATA ELFDATA2MSB 46 #else 47 #define ELF_DATA ELFDATA2LSB 48 #endif 49 50 /* 51 * There seems to be a bug in how compat_binfmt_elf.c works: it 52 * #undefs ELF_ARCH, but it is then used in binfmt_elf.c for fill_note_info(). 53 * Hack around this by providing an enum value of ELF_ARCH. 54 */ 55 enum { ELF_ARCH = CHIP_ELF_TYPE() }; 56 #define ELF_ARCH ELF_ARCH 57 58 /* 59 * This is used to ensure we don't load something for the wrong architecture. 60 */ 61 #define elf_check_arch(x) \ 62 ((x)->e_ident[EI_CLASS] == ELF_CLASS && \ 63 (x)->e_ident[EI_DATA] == ELF_DATA && \ 64 (x)->e_machine == CHIP_ELF_TYPE()) 65 66 /* The module loader only handles a few relocation types. */ 67 #ifndef __tilegx__ 68 #define R_TILE_32 1 69 #define R_TILE_JOFFLONG_X1 15 70 #define R_TILE_IMM16_X0_LO 25 71 #define R_TILE_IMM16_X1_LO 26 72 #define R_TILE_IMM16_X0_HA 29 73 #define R_TILE_IMM16_X1_HA 30 74 #else 75 #define R_TILEGX_64 1 76 #define R_TILEGX_JUMPOFF_X1 21 77 #define R_TILEGX_IMM16_X0_HW0 36 78 #define R_TILEGX_IMM16_X1_HW0 37 79 #define R_TILEGX_IMM16_X0_HW1 38 80 #define R_TILEGX_IMM16_X1_HW1 39 81 #define R_TILEGX_IMM16_X0_HW2_LAST 48 82 #define R_TILEGX_IMM16_X1_HW2_LAST 49 83 #endif 84 85 /* Use standard page size for core dumps. */ 86 #define ELF_EXEC_PAGESIZE PAGE_SIZE 87 88 /* 89 * This is the location that an ET_DYN program is loaded if exec'ed. Typical 90 * use of this is to invoke "./ld.so someprog" to test out a new version of 91 * the loader. We need to make sure that it is out of the way of the program 92 * that it will "exec", and that there is sufficient room for the brk. 93 */ 94 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 95 96 #define ELF_CORE_COPY_REGS(_dest, _regs) \ 97 memcpy((char *) &_dest, (char *) _regs, \ 98 sizeof(struct pt_regs)); 99 100 /* No additional FP registers to copy. */ 101 #define ELF_CORE_COPY_FPREGS(t, fpu) 0 102 103 /* 104 * This yields a mask that user programs can use to figure out what 105 * instruction set this CPU supports. This could be done in user space, 106 * but it's not easy, and we've already done it here. 107 */ 108 #define ELF_HWCAP (0) 109 110 /* 111 * This yields a string that ld.so will use to load implementation 112 * specific libraries for optimization. This is more specific in 113 * intent than poking at uname or /proc/cpuinfo. 114 */ 115 #define ELF_PLATFORM (NULL) 116 117 extern void elf_plat_init(struct pt_regs *regs, unsigned long load_addr); 118 119 #define ELF_PLAT_INIT(_r, load_addr) elf_plat_init(_r, load_addr) 120 121 extern int dump_task_regs(struct task_struct *, elf_gregset_t *); 122 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs) 123 124 /* Tilera Linux has no personalities currently, so no need to do anything. */ 125 #define SET_PERSONALITY(ex) do { } while (0) 126 127 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 128 /* Support auto-mapping of the user interrupt vectors. */ 129 struct linux_binprm; 130 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 131 int executable_stack); 132 /* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */ 133 #define ARCH_DLINFO \ 134 do { \ 135 NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE); \ 136 } while (0) 137 138 struct mm_struct; 139 extern unsigned long arch_randomize_brk(struct mm_struct *mm); 140 #define arch_randomize_brk arch_randomize_brk 141 142 #ifdef CONFIG_COMPAT 143 144 #define COMPAT_ELF_PLATFORM "tilegx-m32" 145 146 /* 147 * "Compat" binaries have the same machine type, but 32-bit class, 148 * since they're not a separate machine type, but just a 32-bit 149 * variant of the standard 64-bit architecture. 150 */ 151 #define compat_elf_check_arch(x) \ 152 ((x)->e_ident[EI_CLASS] == ELFCLASS32 && \ 153 (x)->e_machine == CHIP_ELF_TYPE()) 154 155 #define compat_start_thread(regs, ip, usp) do { \ 156 regs->pc = ptr_to_compat_reg((void *)(ip)); \ 157 regs->sp = ptr_to_compat_reg((void *)(usp)); \ 158 single_step_execve(); \ 159 } while (0) 160 161 /* 162 * Use SET_PERSONALITY to indicate compatibility via TS_COMPAT. 163 */ 164 #undef SET_PERSONALITY 165 #define SET_PERSONALITY(ex) \ 166 do { \ 167 set_personality(PER_LINUX | (current->personality & (~PER_MASK))); \ 168 current_thread_info()->status &= ~TS_COMPAT; \ 169 } while (0) 170 #define COMPAT_SET_PERSONALITY(ex) \ 171 do { \ 172 set_personality(PER_LINUX | (current->personality & (~PER_MASK))); \ 173 current_thread_info()->status |= TS_COMPAT; \ 174 } while (0) 175 176 #define COMPAT_ELF_ET_DYN_BASE (0xffffffff / 3 * 2) 177 178 #endif /* CONFIG_COMPAT */ 179 180 #define CORE_DUMP_USE_REGSET 181 182 #endif /* _ASM_TILE_ELF_H */ 183