1 /* 2 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> 3 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> 4 * Copyright (C) 2012 Regents of the University of California 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License as published by 8 * the Free Software Foundation; either version 2 of the License, or 9 * (at your option) any later version. 10 */ 11 12 #ifndef _ASM_RISCV_ELF_H 13 #define _ASM_RISCV_ELF_H 14 15 #include <uapi/asm/elf.h> 16 #include <asm/auxvec.h> 17 #include <asm/byteorder.h> 18 19 /* TODO: Move definition into include/uapi/linux/elf-em.h */ 20 #define EM_RISCV 0xF3 21 22 /* 23 * These are used to set parameters in the core dumps. 24 */ 25 #define ELF_ARCH EM_RISCV 26 27 #ifdef CONFIG_64BIT 28 #define ELF_CLASS ELFCLASS64 29 #else 30 #define ELF_CLASS ELFCLASS32 31 #endif 32 33 #if defined(__LITTLE_ENDIAN) 34 #define ELF_DATA ELFDATA2LSB 35 #elif defined(__BIG_ENDIAN) 36 #define ELF_DATA ELFDATA2MSB 37 #else 38 #error "Unknown endianness" 39 #endif 40 41 /* 42 * This is used to ensure we don't load something for the wrong architecture. 43 */ 44 #define elf_check_arch(x) ((x)->e_machine == EM_RISCV) 45 46 #define CORE_DUMP_USE_REGSET 47 #define ELF_EXEC_PAGESIZE (PAGE_SIZE) 48 49 /* 50 * This is the location that an ET_DYN program is loaded if exec'ed. Typical 51 * use of this is to invoke "./ld.so someprog" to test out a new version of 52 * the loader. We need to make sure that it is out of the way of the program 53 * that it will "exec", and that there is sufficient room for the brk. 54 */ 55 #define ELF_ET_DYN_BASE ((TASK_SIZE / 3) * 2) 56 57 /* 58 * This yields a mask that user programs can use to figure out what 59 * instruction set this CPU supports. This could be done in user space, 60 * but it's not easy, and we've already done it here. 61 */ 62 #define ELF_HWCAP (elf_hwcap) 63 extern unsigned long elf_hwcap; 64 65 /* 66 * This yields a string that ld.so will use to load implementation 67 * specific libraries for optimization. This is more specific in 68 * intent than poking at uname or /proc/cpuinfo. 69 */ 70 #define ELF_PLATFORM (NULL) 71 72 #define ARCH_DLINFO \ 73 do { \ 74 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 75 (elf_addr_t)current->mm->context.vdso); \ 76 } while (0) 77 78 79 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 80 struct linux_binprm; 81 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 82 int uses_interp); 83 84 #endif /* _ASM_RISCV_ELF_H */ 85