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 /* 20 * These are used to set parameters in the core dumps. 21 */ 22 #define ELF_ARCH EM_RISCV 23 24 #ifdef CONFIG_64BIT 25 #define ELF_CLASS ELFCLASS64 26 #else 27 #define ELF_CLASS ELFCLASS32 28 #endif 29 30 #if defined(__LITTLE_ENDIAN) 31 #define ELF_DATA ELFDATA2LSB 32 #elif defined(__BIG_ENDIAN) 33 #define ELF_DATA ELFDATA2MSB 34 #else 35 #error "Unknown endianness" 36 #endif 37 38 /* 39 * This is used to ensure we don't load something for the wrong architecture. 40 */ 41 #define elf_check_arch(x) ((x)->e_machine == EM_RISCV) 42 43 #define CORE_DUMP_USE_REGSET 44 #define ELF_EXEC_PAGESIZE (PAGE_SIZE) 45 46 /* 47 * This is the location that an ET_DYN program is loaded if exec'ed. Typical 48 * use of this is to invoke "./ld.so someprog" to test out a new version of 49 * the loader. We need to make sure that it is out of the way of the program 50 * that it will "exec", and that there is sufficient room for the brk. 51 */ 52 #define ELF_ET_DYN_BASE ((TASK_SIZE / 3) * 2) 53 54 /* 55 * This yields a mask that user programs can use to figure out what 56 * instruction set this CPU supports. This could be done in user space, 57 * but it's not easy, and we've already done it here. 58 */ 59 #define ELF_HWCAP (elf_hwcap) 60 extern unsigned long elf_hwcap; 61 62 /* 63 * This yields a string that ld.so will use to load implementation 64 * specific libraries for optimization. This is more specific in 65 * intent than poking at uname or /proc/cpuinfo. 66 */ 67 #define ELF_PLATFORM (NULL) 68 69 #define ARCH_DLINFO \ 70 do { \ 71 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 72 (elf_addr_t)current->mm->context.vdso); \ 73 } while (0) 74 75 76 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 77 struct linux_binprm; 78 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 79 int uses_interp); 80 81 #endif /* _ASM_RISCV_ELF_H */ 82