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 #define ELF_DATA ELFDATA2LSB 48 49 /* 50 * There seems to be a bug in how compat_binfmt_elf.c works: it 51 * #undefs ELF_ARCH, but it is then used in binfmt_elf.c for fill_note_info(). 52 * Hack around this by providing an enum value of ELF_ARCH. 53 */ 54 enum { ELF_ARCH = CHIP_ELF_TYPE() }; 55 #define ELF_ARCH ELF_ARCH 56 57 /* 58 * This is used to ensure we don't load something for the wrong architecture. 59 */ 60 #define elf_check_arch(x) \ 61 ((x)->e_ident[EI_CLASS] == ELF_CLASS && \ 62 (x)->e_machine == CHIP_ELF_TYPE()) 63 64 /* The module loader only handles a few relocation types. */ 65 #ifndef __tilegx__ 66 #define R_TILE_32 1 67 #define R_TILE_JOFFLONG_X1 15 68 #define R_TILE_IMM16_X0_LO 25 69 #define R_TILE_IMM16_X1_LO 26 70 #define R_TILE_IMM16_X0_HA 29 71 #define R_TILE_IMM16_X1_HA 30 72 #else 73 #define R_TILEGX_64 1 74 #define R_TILEGX_JUMPOFF_X1 21 75 #define R_TILEGX_IMM16_X0_HW0 36 76 #define R_TILEGX_IMM16_X1_HW0 37 77 #define R_TILEGX_IMM16_X0_HW1 38 78 #define R_TILEGX_IMM16_X1_HW1 39 79 #define R_TILEGX_IMM16_X0_HW2_LAST 48 80 #define R_TILEGX_IMM16_X1_HW2_LAST 49 81 #endif 82 83 /* Use standard page size for core dumps. */ 84 #define ELF_EXEC_PAGESIZE PAGE_SIZE 85 86 /* 87 * This is the location that an ET_DYN program is loaded if exec'ed. Typical 88 * use of this is to invoke "./ld.so someprog" to test out a new version of 89 * the loader. We need to make sure that it is out of the way of the program 90 * that it will "exec", and that there is sufficient room for the brk. 91 */ 92 #define ELF_ET_DYN_BASE (TASK_SIZE / 3 * 2) 93 94 #define ELF_CORE_COPY_REGS(_dest, _regs) \ 95 memcpy((char *) &_dest, (char *) _regs, \ 96 sizeof(struct pt_regs)); 97 98 /* No additional FP registers to copy. */ 99 #define ELF_CORE_COPY_FPREGS(t, fpu) 0 100 101 /* 102 * This yields a mask that user programs can use to figure out what 103 * instruction set this CPU supports. This could be done in user space, 104 * but it's not easy, and we've already done it here. 105 */ 106 #define ELF_HWCAP (0) 107 108 /* 109 * This yields a string that ld.so will use to load implementation 110 * specific libraries for optimization. This is more specific in 111 * intent than poking at uname or /proc/cpuinfo. 112 */ 113 #define ELF_PLATFORM (NULL) 114 115 extern void elf_plat_init(struct pt_regs *regs, unsigned long load_addr); 116 117 #define ELF_PLAT_INIT(_r, load_addr) elf_plat_init(_r, load_addr) 118 119 extern int dump_task_regs(struct task_struct *, elf_gregset_t *); 120 #define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs) 121 122 /* Tilera Linux has no personalities currently, so no need to do anything. */ 123 #define SET_PERSONALITY(ex) do { } while (0) 124 125 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 126 /* Support auto-mapping of the user interrupt vectors. */ 127 struct linux_binprm; 128 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 129 int executable_stack); 130 #ifdef CONFIG_COMPAT 131 132 #define COMPAT_ELF_PLATFORM "tilegx-m32" 133 134 /* 135 * "Compat" binaries have the same machine type, but 32-bit class, 136 * since they're not a separate machine type, but just a 32-bit 137 * variant of the standard 64-bit architecture. 138 */ 139 #define compat_elf_check_arch(x) \ 140 ((x)->e_ident[EI_CLASS] == ELFCLASS32 && \ 141 (x)->e_machine == CHIP_ELF_TYPE()) 142 143 #define compat_start_thread(regs, ip, usp) do { \ 144 regs->pc = ptr_to_compat_reg((void *)(ip)); \ 145 regs->sp = ptr_to_compat_reg((void *)(usp)); \ 146 } while (0) 147 148 /* 149 * Use SET_PERSONALITY to indicate compatibility via TS_COMPAT. 150 */ 151 #undef SET_PERSONALITY 152 #define SET_PERSONALITY(ex) \ 153 do { \ 154 current->personality = PER_LINUX; \ 155 current_thread_info()->status &= ~TS_COMPAT; \ 156 } while (0) 157 #define COMPAT_SET_PERSONALITY(ex) \ 158 do { \ 159 current->personality = PER_LINUX_32BIT; \ 160 current_thread_info()->status |= TS_COMPAT; \ 161 } while (0) 162 163 #define COMPAT_ELF_ET_DYN_BASE (0xffffffff / 3 * 2) 164 165 #endif /* CONFIG_COMPAT */ 166 167 #endif /* _ASM_TILE_ELF_H */ 168