Chris Metcalf | 867e359 | 2010-05-28 23:09:12 -0400 | [diff] [blame] | 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 && \ |
Chris Metcalf | 0707ad3 | 2010-06-25 17:04:17 -0400 | [diff] [blame^] | 62 | (x)->e_machine == CHIP_ELF_TYPE()) |
Chris Metcalf | 867e359 | 2010-05-28 23:09:12 -0400 | [diff] [blame] | 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 && \ |
Chris Metcalf | 0707ad3 | 2010-06-25 17:04:17 -0400 | [diff] [blame^] | 141 | (x)->e_machine == CHIP_ELF_TYPE()) |
Chris Metcalf | 867e359 | 2010-05-28 23:09:12 -0400 | [diff] [blame] | 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 */ |