1/* SPDX-License-Identifier: GPL-2.0 */
 2// Copyright (C) 2018 Hangzhou C-SKY Microsystems co.,ltd.
 3
 4#ifndef __ASM_CSKY_ELF_H
 5#define __ASM_CSKY_ELF_H
 6
 7#include <asm/ptrace.h>
 8#include <abi/regdef.h>
 9
10#define ELF_ARCH EM_CSKY
11#define EM_CSKY_OLD 39
12
13/* CSKY Relocations */
14#define R_CSKY_NONE               0
15#define R_CSKY_32                 1
16#define R_CSKY_PCIMM8BY4          2
17#define R_CSKY_PCIMM11BY2         3
18#define R_CSKY_PCIMM4BY2          4
19#define R_CSKY_PC32               5
20#define R_CSKY_PCRELJSR_IMM11BY2  6
21#define R_CSKY_GNU_VTINHERIT      7
22#define R_CSKY_GNU_VTENTRY        8
23#define R_CSKY_RELATIVE           9
24#define R_CSKY_COPY               10
25#define R_CSKY_GLOB_DAT           11
26#define R_CSKY_JUMP_SLOT          12
27#define R_CSKY_ADDR_HI16          24
28#define R_CSKY_ADDR_LO16          25
29#define R_CSKY_PCRELJSR_IMM26BY2  40
30
31typedef unsigned long elf_greg_t;
32
33typedef struct user_fp elf_fpregset_t;
34
35/*
36 * In gdb/bfd elf32-csky.c, csky_elf_grok_prstatus() use fixed size of
37 * elf_prstatus. It's 148 for abiv1 and 220 for abiv2, the size is enough
38 * for coredump and no need full sizeof(struct pt_regs).
39 */
40#define ELF_NGREG ((sizeof(struct pt_regs) / sizeof(elf_greg_t)) - 2)
41
42typedef elf_greg_t elf_gregset_t[ELF_NGREG];
43
44/*
45 * This is used to ensure we don't load something for the wrong architecture.
46 */
47#define elf_check_arch(x) (((x)->e_machine == ELF_ARCH) || \
48			   ((x)->e_machine == EM_CSKY_OLD))
49
50/*
51 * These are used to set parameters in the core dumps.
52 */
53#define USE_ELF_CORE_DUMP
54#define ELF_EXEC_PAGESIZE		4096
55#define ELF_CLASS			ELFCLASS32
56#define ELF_PLAT_INIT(_r, load_addr)	{ _r->a0 = 0; }
57
58#ifdef __cskyBE__
59#define ELF_DATA	ELFDATA2MSB
60#else
61#define ELF_DATA	ELFDATA2LSB
62#endif
63
64/*
65 * This is the location that an ET_DYN program is loaded if exec'ed. Typical
66 * use of this is to invoke "./ld.so someprog" to test out a new version of
67 * the loader.  We need to make sure that it is out of the way of the program
68 * that it will "exec", and that there is sufficient room for the brk.
69 */
70#define ELF_ET_DYN_BASE	0x0UL
71#include <abi/elf.h>
72
73/* Similar, but for a thread other than current. */
74struct task_struct;
75extern int dump_task_regs(struct task_struct *tsk, elf_gregset_t *elf_regs);
76#define ELF_CORE_COPY_TASK_REGS(tsk, elf_regs) dump_task_regs(tsk, elf_regs)
77
78#define ELF_HWCAP	(0)
79
80/*
81 * This yields a string that ld.so will use to load implementation specific
82 * libraries for optimization. This is more specific in intent than poking
83 * at uname or /proc/cpuinfo.
84 */
85#define ELF_PLATFORM		(NULL)
86#define SET_PERSONALITY(ex)	set_personality(PER_LINUX)
87
88#define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
89struct linux_binprm;
90extern int arch_setup_additional_pages(struct linux_binprm *bprm,
91				       int uses_interp);
92#endif /* __ASM_CSKY_ELF_H */