1/* MN10300 ELF constant and register definitions 2 * 3 * Copyright (C) 2007 Matsushita Electric Industrial Co., Ltd. 4 * Copyright (C) 2007 Red Hat, Inc. All Rights Reserved. 5 * Written by David Howells (dhowells@redhat.com) 6 * 7 * This program is free software; you can redistribute it and/or 8 * modify it under the terms of the GNU General Public Licence 9 * as published by the Free Software Foundation; either version 10 * 2 of the Licence, or (at your option) any later version. 11 */ 12#ifndef _ASM_ELF_H 13#define _ASM_ELF_H 14 15#include <linux/utsname.h> 16#include <asm/ptrace.h> 17#include <asm/user.h> 18 19/* 20 * AM33 relocations 21 */ 22#define R_MN10300_NONE 0 /* No reloc. */ 23#define R_MN10300_32 1 /* Direct 32 bit. */ 24#define R_MN10300_16 2 /* Direct 16 bit. */ 25#define R_MN10300_8 3 /* Direct 8 bit. */ 26#define R_MN10300_PCREL32 4 /* PC-relative 32-bit. */ 27#define R_MN10300_PCREL16 5 /* PC-relative 16-bit signed. */ 28#define R_MN10300_PCREL8 6 /* PC-relative 8-bit signed. */ 29#define R_MN10300_24 9 /* Direct 24 bit. */ 30#define R_MN10300_RELATIVE 23 /* Adjust by program base. */ 31#define R_MN10300_SYM_DIFF 33 /* Adjustment when relaxing. */ 32#define R_MN10300_ALIGN 34 /* Alignment requirement. */ 33 34/* 35 * AM33/AM34 HW Capabilities 36 */ 37#define HWCAP_MN10300_ATOMIC_OP_UNIT 1 /* Has AM34 Atomic Operations */ 38 39 40/* 41 * ELF register definitions.. 42 */ 43typedef unsigned long elf_greg_t; 44 45#define ELF_NGREG ((sizeof(struct pt_regs) / sizeof(elf_greg_t)) - 1) 46typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 47 48#define ELF_NFPREG 32 49typedef float elf_fpreg_t; 50 51typedef struct { 52 elf_fpreg_t fpregs[ELF_NFPREG]; 53 u_int32_t fpcr; 54} elf_fpregset_t; 55 56/* 57 * This is used to ensure we don't load something for the wrong architecture 58 */ 59#define elf_check_arch(x) \ 60 (((x)->e_machine == EM_CYGNUS_MN10300) || \ 61 ((x)->e_machine == EM_MN10300)) 62 63/* 64 * These are used to set parameters in the core dumps. 65 */ 66#define ELF_CLASS ELFCLASS32 67#define ELF_DATA ELFDATA2LSB 68#define ELF_ARCH EM_MN10300 69 70/* 71 * ELF process initialiser 72 */ 73#define ELF_PLAT_INIT(_r, load_addr) \ 74do { \ 75 struct pt_regs *_ur = current->thread.uregs; \ 76 _ur->a3 = 0; _ur->a2 = 0; _ur->d3 = 0; _ur->d2 = 0; \ 77 _ur->mcvf = 0; _ur->mcrl = 0; _ur->mcrh = 0; _ur->mdrq = 0; \ 78 _ur->e1 = 0; _ur->e0 = 0; _ur->e7 = 0; _ur->e6 = 0; \ 79 _ur->e5 = 0; _ur->e4 = 0; _ur->e3 = 0; _ur->e2 = 0; \ 80 _ur->lar = 0; _ur->lir = 0; _ur->mdr = 0; \ 81 _ur->a1 = 0; _ur->a0 = 0; _ur->d1 = 0; _ur->d0 = 0; \ 82} while (0) 83 84#define CORE_DUMP_USE_REGSET 85#define ELF_EXEC_PAGESIZE 4096 86 87/* 88 * This is the location that an ET_DYN program is loaded if exec'ed. Typical 89 * use of this is to invoke "./ld.so someprog" to test out a new version of 90 * the loader. We need to make sure that it is out of the way of the program 91 * that it will "exec", and that there is sufficient room for the brk. 92 * - must clear the VMALLOC area 93 */ 94#define ELF_ET_DYN_BASE 0x04000000 95 96/* 97 * regs is struct pt_regs, pr_reg is elf_gregset_t (which is 98 * now struct user_regs, they are different) 99 * - ELF_CORE_COPY_REGS has been guessed, and may be wrong 100 */ 101#define ELF_CORE_COPY_REGS(pr_reg, regs) \ 102do { \ 103 pr_reg[0] = regs->a3; \ 104 pr_reg[1] = regs->a2; \ 105 pr_reg[2] = regs->d3; \ 106 pr_reg[3] = regs->d2; \ 107 pr_reg[4] = regs->mcvf; \ 108 pr_reg[5] = regs->mcrl; \ 109 pr_reg[6] = regs->mcrh; \ 110 pr_reg[7] = regs->mdrq; \ 111 pr_reg[8] = regs->e1; \ 112 pr_reg[9] = regs->e0; \ 113 pr_reg[10] = regs->e7; \ 114 pr_reg[11] = regs->e6; \ 115 pr_reg[12] = regs->e5; \ 116 pr_reg[13] = regs->e4; \ 117 pr_reg[14] = regs->e3; \ 118 pr_reg[15] = regs->e2; \ 119 pr_reg[16] = regs->sp; \ 120 pr_reg[17] = regs->lar; \ 121 pr_reg[18] = regs->lir; \ 122 pr_reg[19] = regs->mdr; \ 123 pr_reg[20] = regs->a1; \ 124 pr_reg[21] = regs->a0; \ 125 pr_reg[22] = regs->d1; \ 126 pr_reg[23] = regs->d0; \ 127 pr_reg[24] = regs->orig_d0; \ 128 pr_reg[25] = regs->epsw; \ 129 pr_reg[26] = regs->pc; \ 130} while (0); 131 132/* 133 * This yields a mask that user programs can use to figure out what 134 * instruction set this CPU supports. This could be done in user space, 135 * but it's not easy, and we've already done it here. 136 */ 137#ifdef CONFIG_MN10300_HAS_ATOMIC_OPS_UNIT 138#define ELF_HWCAP (HWCAP_MN10300_ATOMIC_OP_UNIT) 139#else 140#define ELF_HWCAP (0) 141#endif 142 143/* 144 * This yields a string that ld.so will use to load implementation 145 * specific libraries for optimization. This is more specific in 146 * intent than poking at uname or /proc/cpuinfo. 147 * 148 * For the moment, we have only optimizations for the Intel generations, 149 * but that could change... 150 */ 151#define ELF_PLATFORM (NULL) 152 153#endif /* _ASM_ELF_H */ 154