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
15 /*
16 * These are used to set parameters in the core dumps.
17 */
18 #define ELF_ARCH EM_RISCV
19
20 #ifdef CONFIG_64BIT
21 #define ELF_CLASS ELFCLASS64
22 #else
23 #define ELF_CLASS ELFCLASS32
24 #endif
25
26 #define ELF_DATA ELFDATA2LSB
27
28 /*
29 * This is used to ensure we don't load something for the wrong architecture.
30 */
31 #define elf_check_arch(x) ((x)->e_machine == EM_RISCV)
32
33 #define CORE_DUMP_USE_REGSET
34 #define ELF_EXEC_PAGESIZE (PAGE_SIZE)
35
36 /*
37 * This is the location that an ET_DYN program is loaded if exec'ed. Typical
38 * use of this is to invoke "./ld.so someprog" to test out a new version of
39 * the loader. We need to make sure that it is out of the way of the program
40 * that it will "exec", and that there is sufficient room for the brk.
41 */
42 #define ELF_ET_DYN_BASE ((TASK_SIZE / 3) * 2)
43
44 /*
45 * This yields a mask that user programs can use to figure out what
46 * instruction set this CPU supports. This could be done in user space,
47 * but it's not easy, and we've already done it here.
48 */
49 #define ELF_HWCAP (elf_hwcap)
50 extern unsigned long elf_hwcap;
51
52 /*
53 * This yields a string that ld.so will use to load implementation
54 * specific libraries for optimization. This is more specific in
55 * intent than poking at uname or /proc/cpuinfo.
56 */
57 #define ELF_PLATFORM (NULL)
58
59 #define ARCH_DLINFO \
60 do { \
61 NEW_AUX_ENT(AT_SYSINFO_EHDR, \
62 (elf_addr_t)current->mm->context.vdso); \
63 } while (0)
64
65
66 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES
67 struct linux_binprm;
68 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
69 int uses_interp);
70
71 #endif /* _ASM_RISCV_ELF_H */