1 /* 2 * OpenRISC Linux 3 * 4 * Linux architectural port borrowing liberally from similar works of 5 * others. All original copyrights apply as per the original source 6 * declaration. 7 * 8 * OpenRISC implementation: 9 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> 10 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> 11 * et al. 12 * 13 * This program is free software; you can redistribute it and/or modify 14 * it under the terms of the GNU General Public License as published by 15 * the Free Software Foundation; either version 2 of the License, or 16 * (at your option) any later version. 17 */ 18 19 #ifndef __ASM_OPENRISC_ELF_H 20 #define __ASM_OPENRISC_ELF_H 21 22 /* 23 * This files is partially exported to userspace. This allows us to keep 24 * the ELF bits in one place which should assist in keeping the kernel and 25 * userspace in sync. 26 */ 27 28 /* 29 * ELF register definitions.. 30 */ 31 32 /* for struct user_regs_struct definition */ 33 #include <asm/ptrace.h> 34 35 /* The OR1K relocation types... not all relevant for module loader */ 36 #define R_OR32_NONE 0 37 #define R_OR32_32 1 38 #define R_OR32_16 2 39 #define R_OR32_8 3 40 #define R_OR32_CONST 4 41 #define R_OR32_CONSTH 5 42 #define R_OR32_JUMPTARG 6 43 #define R_OR32_VTINHERIT 7 44 #define R_OR32_VTENTRY 8 45 46 typedef unsigned long elf_greg_t; 47 48 /* 49 * Note that NGREG is defined to ELF_NGREG in include/linux/elfcore.h, and is 50 * thus exposed to user-space. 51 */ 52 #define ELF_NGREG (sizeof(struct user_regs_struct) / sizeof(elf_greg_t)) 53 typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 54 55 /* A placeholder; OR32 does not have fp support yes, so no fp regs for now. */ 56 typedef unsigned long elf_fpregset_t; 57 58 /* This should be moved to include/linux/elf.h */ 59 #define EM_OR32 0x8472 60 #define EM_OPENRISC 92 /* OpenRISC 32-bit embedded processor */ 61 62 /* 63 * These are used to set parameters in the core dumps. 64 */ 65 #define ELF_ARCH EM_OR32 66 #define ELF_CLASS ELFCLASS32 67 #define ELF_DATA ELFDATA2MSB 68 69 #ifdef __KERNEL__ 70 71 #include <linux/types.h> 72 73 /* 74 * This is used to ensure we don't load something for the wrong architecture. 75 */ 76 77 #define elf_check_arch(x) \ 78 (((x)->e_machine == EM_OR32) || ((x)->e_machine == EM_OPENRISC)) 79 80 /* This is the location that an ET_DYN program is loaded if exec'ed. Typical 81 use of this is to invoke "./ld.so someprog" to test out a new version of 82 the loader. We need to make sure that it is out of the way of the program 83 that it will "exec", and that there is sufficient room for the brk. */ 84 85 #define ELF_ET_DYN_BASE (0x08000000) 86 87 /* 88 * Enable dump using regset. 89 * This covers all of general/DSP/FPU regs. 90 */ 91 #define CORE_DUMP_USE_REGSET 92 93 #define ELF_EXEC_PAGESIZE 8192 94 95 extern void dump_elf_thread(elf_greg_t *dest, struct pt_regs *pt); 96 #define ELF_CORE_COPY_REGS(dest, regs) dump_elf_thread(dest, regs); 97 98 /* This yields a mask that user programs can use to figure out what 99 instruction set this cpu supports. This could be done in userspace, 100 but it's not easy, and we've already done it here. */ 101 102 #define ELF_HWCAP (0) 103 104 /* This yields a string that ld.so will use to load implementation 105 specific libraries for optimization. This is more specific in 106 intent than poking at uname or /proc/cpuinfo. 107 108 For the moment, we have only optimizations for the Intel generations, 109 but that could change... */ 110 111 #define ELF_PLATFORM (NULL) 112 113 #define SET_PERSONALITY(ex) \ 114 set_personality(PER_LINUX | (current->personality & (~PER_MASK))) 115 116 #endif /* __KERNEL__ */ 117 #endif 118