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1/* SPDX-License-Identifier: GPL-2.0 */
2
3#ifndef __ASM_CSKY_ELF_H
4#define __ASM_CSKY_ELF_H
5
6#include <asm/ptrace.h>
7#include <abi/regdef.h>
8
9#define ELF_ARCH EM_CSKY
10#define EM_CSKY_OLD 39
11
12/* CSKY Relocations */
13#define R_CSKY_NONE 0
14#define R_CSKY_32 1
15#define R_CSKY_PCIMM8BY4 2
16#define R_CSKY_PCIMM11BY2 3
17#define R_CSKY_PCIMM4BY2 4
18#define R_CSKY_PC32 5
19#define R_CSKY_PCRELJSR_IMM11BY2 6
20#define R_CSKY_GNU_VTINHERIT 7
21#define R_CSKY_GNU_VTENTRY 8
22#define R_CSKY_RELATIVE 9
23#define R_CSKY_COPY 10
24#define R_CSKY_GLOB_DAT 11
25#define R_CSKY_JUMP_SLOT 12
26#define R_CSKY_ADDR_HI16 24
27#define R_CSKY_ADDR_LO16 25
28#define R_CSKY_PCRELJSR_IMM26BY2 40
29
30typedef unsigned long elf_greg_t;
31
32typedef struct user_fp elf_fpregset_t;
33
34/*
35 * In gdb/bfd elf32-csky.c, csky_elf_grok_prstatus() use fixed size of
36 * elf_prstatus. It's 148 for abiv1 and 220 for abiv2, the size is enough
37 * for coredump and no need full sizeof(struct pt_regs).
38 */
39#define ELF_NGREG ((sizeof(struct pt_regs) / sizeof(elf_greg_t)) - 2)
40
41typedef elf_greg_t elf_gregset_t[ELF_NGREG];
42
43/*
44 * This is used to ensure we don't load something for the wrong architecture.
45 */
46#define elf_check_arch(x) (((x)->e_machine == ELF_ARCH) || \
47 ((x)->e_machine == EM_CSKY_OLD))
48
49/*
50 * These are used to set parameters in the core dumps.
51 */
52#define ELF_EXEC_PAGESIZE 4096
53#define ELF_CLASS ELFCLASS32
54#define ELF_PLAT_INIT(_r, load_addr) { _r->a0 = 0; }
55
56#ifdef __cskyBE__
57#define ELF_DATA ELFDATA2MSB
58#else
59#define ELF_DATA ELFDATA2LSB
60#endif
61
62/*
63 * This is the location that an ET_DYN program is loaded if exec'ed. Typical
64 * use of this is to invoke "./ld.so someprog" to test out a new version of
65 * the loader. We need to make sure that it is out of the way of the program
66 * that it will "exec", and that there is sufficient room for the brk.
67 */
68#define ELF_ET_DYN_BASE 0x0UL
69#include <abi/elf.h>
70
71/* Similar, but for a thread other than current. */
72struct task_struct;
73extern int dump_task_regs(struct task_struct *tsk, elf_gregset_t *elf_regs);
74#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
75
76#define ELF_HWCAP (0)
77
78/*
79 * This yields a string that ld.so will use to load implementation specific
80 * libraries for optimization. This is more specific in intent than poking
81 * at uname or /proc/cpuinfo.
82 */
83#define ELF_PLATFORM (NULL)
84#define SET_PERSONALITY(ex) set_personality(PER_LINUX)
85
86#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
87struct linux_binprm;
88extern int arch_setup_additional_pages(struct linux_binprm *bprm,
89 int uses_interp);
90#endif /* __ASM_CSKY_ELF_H */