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 #ifdef CONFIG_64BIT 46 #define STACK_RND_MASK (0x3ffff >> (PAGE_SHIFT - 12)) 47 #endif 48 /* 49 * This yields a mask that user programs can use to figure out what 50 * instruction set this CPU supports. This could be done in user space, 51 * but it's not easy, and we've already done it here. 52 */ 53 #define ELF_HWCAP (elf_hwcap) 54 extern unsigned long elf_hwcap; 55 56 /* 57 * This yields a string that ld.so will use to load implementation 58 * specific libraries for optimization. This is more specific in 59 * intent than poking at uname or /proc/cpuinfo. 60 */ 61 #define ELF_PLATFORM (NULL) 62 63 #ifdef CONFIG_MMU 64 #define ARCH_DLINFO \ 65 do { \ 66 NEW_AUX_ENT(AT_SYSINFO_EHDR, \ 67 (elf_addr_t)current->mm->context.vdso); \ 68 NEW_AUX_ENT(AT_L1I_CACHESIZE, \ 69 get_cache_size(1, CACHE_TYPE_INST)); \ 70 NEW_AUX_ENT(AT_L1I_CACHEGEOMETRY, \ 71 get_cache_geometry(1, CACHE_TYPE_INST)); \ 72 NEW_AUX_ENT(AT_L1D_CACHESIZE, \ 73 get_cache_size(1, CACHE_TYPE_DATA)); \ 74 NEW_AUX_ENT(AT_L1D_CACHEGEOMETRY, \ 75 get_cache_geometry(1, CACHE_TYPE_DATA)); \ 76 NEW_AUX_ENT(AT_L2_CACHESIZE, \ 77 get_cache_size(2, CACHE_TYPE_UNIFIED)); \ 78 NEW_AUX_ENT(AT_L2_CACHEGEOMETRY, \ 79 get_cache_geometry(2, CACHE_TYPE_UNIFIED)); \ 80 } while (0) 81 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 82 struct linux_binprm; 83 extern int arch_setup_additional_pages(struct linux_binprm *bprm, 84 int uses_interp); 85 #endif /* CONFIG_MMU */ 86 87 #define ELF_CORE_COPY_REGS(dest, regs) \ 88 do { \ 89 *(struct user_regs_struct *)&(dest) = \ 90 *(struct user_regs_struct *)regs; \ 91 } while (0); 92 93 #endif /* _ASM_RISCV_ELF_H */ 94