1 /* SPDX-License-Identifier: GPL-2.0-or-later */
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
8 #ifndef _ASM_RISCV_ELF_H
9 #define _ASM_RISCV_ELF_H
11 #include <uapi/asm/elf.h>
12 #include <asm/auxvec.h>
13 #include <asm/byteorder.h>
14 #include <asm/cacheinfo.h>
17 * These are used to set parameters in the core dumps.
19 #define ELF_ARCH EM_RISCV
22 #define ELF_CLASS ELFCLASS64
24 #define ELF_CLASS ELFCLASS32
27 #define ELF_DATA ELFDATA2LSB
30 * This is used to ensure we don't load something for the wrong architecture.
32 #define elf_check_arch(x) ((x)->e_machine == EM_RISCV)
34 #define CORE_DUMP_USE_REGSET
35 #define ELF_EXEC_PAGESIZE (PAGE_SIZE)
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.
43 #define ELF_ET_DYN_BASE ((TASK_SIZE / 3) * 2)
46 #define STACK_RND_MASK (0x3ffff >> (PAGE_SHIFT - 12))
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.
53 #define ELF_HWCAP (elf_hwcap)
54 extern unsigned long elf_hwcap;
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.
61 #define ELF_PLATFORM (NULL)
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)); \
81 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES
83 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
85 #endif /* CONFIG_MMU */
87 #define ELF_CORE_COPY_REGS(dest, regs) \
89 *(struct user_regs_struct *)&(dest) = \
90 *(struct user_regs_struct *)regs; \
93 #endif /* _ASM_RISCV_ELF_H */