1 /* SPDX-License-Identifier: GPL-2.0-or-later */ 2 /* 3 * Copyright (C) 2003 Matjaz Breskvar <phoenix@bsemi.com> 4 * Copyright (C) 2010-2011 Jonas Bonn <jonas@southpole.se> 5 * Copyright (C) 2012 Regents of the University of California 6 */ 7 8 #ifndef _ASM_RISCV_ELF_H 9 #define _ASM_RISCV_ELF_H 10 11 #include <uapi/asm/elf.h> 12 #include <asm/auxvec.h> 13 #include <asm/byteorder.h> 14 #include <asm/cacheinfo.h> 15 16 /* 17 * These are used to set parameters in the core dumps. 18 */ 19 #define ELF_ARCH EM_RISCV 20 21 #ifdef CONFIG_64BIT 22 #define ELF_CLASS ELFCLASS64 23 #else 24 #define ELF_CLASS ELFCLASS32 25 #endif 26 27 #define ELF_DATA ELFDATA2LSB 28 29 /* 30 * This is used to ensure we don't load something for the wrong architecture. 31 */ 32 #define elf_check_arch(x) ((x)->e_machine == EM_RISCV) 33 34 #define CORE_DUMP_USE_REGSET 35 #define ELF_EXEC_PAGESIZE (PAGE_SIZE) 36 37 /* 38 * This is the location that an ET_DYN program is loaded if exec'ed. Typical 39 * use of this is to invoke "./ld.so someprog" to test out a new version of 40 * the loader. We need to make sure that it is out of the way of the program 41 * that it will "exec", and that there is sufficient room for the brk. 42 */ 43 #define ELF_ET_DYN_BASE ((TASK_SIZE / 3) * 2) 44 45 /* 46 * This yields a mask that user programs can use to figure out what 47 * instruction set this CPU supports. This could be done in user space, 48 * but it's not easy, and we've already done it here. 49 */ 50 #define ELF_HWCAP (elf_hwcap) 51 extern unsigned long elf_hwcap; 52 53 /* 54 * This yields a string that ld.so will use to load implementation 55 * specific libraries for optimization. This is more specific in 56 * intent than poking at uname or /proc/cpuinfo. 57 */ 58 #define ELF_PLATFORM (NULL) 59 60 #ifdef CONFIG_MMU 61 #define ARCH_DLINFO \ 62 do { \ 63 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 64 (elf_addr_t)current->mm->context.vdso); \ 65 NEW_AUX_ENT(AT_L1I_CACHESIZE, \ 66 get_cache_size(1, CACHE_TYPE_INST)); \ 67 NEW_AUX_ENT(AT_L1I_CACHEGEOMETRY, \ 68 get_cache_geometry(1, CACHE_TYPE_INST)); \ 69 NEW_AUX_ENT(AT_L1D_CACHESIZE, \ 70 get_cache_size(1, CACHE_TYPE_DATA)); \ 71 NEW_AUX_ENT(AT_L1D_CACHEGEOMETRY, \ 72 get_cache_geometry(1, CACHE_TYPE_DATA)); \ 73 NEW_AUX_ENT(AT_L2_CACHESIZE, \ 74 get_cache_size(2, CACHE_TYPE_UNIFIED)); \ 75 NEW_AUX_ENT(AT_L2_CACHEGEOMETRY, \ 76 get_cache_geometry(2, CACHE_TYPE_UNIFIED)); \ 77 } while (0) 78 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 79 struct linux_binprm; 80 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 81 int uses_interp); 82 #endif /* CONFIG_MMU */ 83 84 #define ELF_CORE_COPY_REGS(dest, regs) \ 85 do { \ 86 *(struct user_regs_struct *)&(dest) = \ 87 *(struct user_regs_struct *)regs; \ 88 } while (0); 89 90 #endif /* _ASM_RISCV_ELF_H */ 91