Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef _LINUX_ELF_H
3#define _LINUX_ELF_H
4
5#include <linux/types.h>
6#include <asm/elf.h>
7#include <uapi/linux/elf.h>
8
9#ifndef elf_read_implies_exec
10 /* Executables for which elf_read_implies_exec() returns TRUE will
11 have the READ_IMPLIES_EXEC personality flag set automatically.
12 Override in asm/elf.h as needed. */
13# define elf_read_implies_exec(ex, have_pt_gnu_stack) 0
14#endif
15#ifndef SET_PERSONALITY
16#define SET_PERSONALITY(ex) \
17 set_personality(PER_LINUX | (current->personality & (~PER_MASK)))
18#endif
19
20#ifndef SET_PERSONALITY2
21#define SET_PERSONALITY2(ex, state) \
22 SET_PERSONALITY(ex)
23#endif
24
25#define ELF32_GNU_PROPERTY_ALIGN 4
26#define ELF64_GNU_PROPERTY_ALIGN 8
27
28#if ELF_CLASS == ELFCLASS32
29
30extern Elf32_Dyn _DYNAMIC [];
31#define elfhdr elf32_hdr
32#define elf_phdr elf32_phdr
33#define elf_shdr elf32_shdr
34#define elf_note elf32_note
35#define elf_addr_t Elf32_Off
36#define Elf_Half Elf32_Half
37#define Elf_Word Elf32_Word
38#define ELF_GNU_PROPERTY_ALIGN ELF32_GNU_PROPERTY_ALIGN
39
40#else
41
42extern Elf64_Dyn _DYNAMIC [];
43#define elfhdr elf64_hdr
44#define elf_phdr elf64_phdr
45#define elf_shdr elf64_shdr
46#define elf_note elf64_note
47#define elf_addr_t Elf64_Off
48#define Elf_Half Elf64_Half
49#define Elf_Word Elf64_Word
50#define ELF_GNU_PROPERTY_ALIGN ELF64_GNU_PROPERTY_ALIGN
51
52#endif
53
54/* Optional callbacks to write extra ELF notes. */
55struct file;
56struct coredump_params;
57
58#ifndef ARCH_HAVE_EXTRA_ELF_NOTES
59static inline int elf_coredump_extra_notes_size(void) { return 0; }
60static inline int elf_coredump_extra_notes_write(struct coredump_params *cprm) { return 0; }
61#else
62extern int elf_coredump_extra_notes_size(void);
63extern int elf_coredump_extra_notes_write(struct coredump_params *cprm);
64#endif
65
66/*
67 * NT_GNU_PROPERTY_TYPE_0 header:
68 * Keep this internal until/unless there is an agreed UAPI definition.
69 * pr_type values (GNU_PROPERTY_*) are public and defined in the UAPI header.
70 */
71struct gnu_property {
72 u32 pr_type;
73 u32 pr_datasz;
74};
75
76struct arch_elf_state;
77
78#ifndef CONFIG_ARCH_USE_GNU_PROPERTY
79static inline int arch_parse_elf_property(u32 type, const void *data,
80 size_t datasz, bool compat,
81 struct arch_elf_state *arch)
82{
83 return 0;
84}
85#else
86extern int arch_parse_elf_property(u32 type, const void *data, size_t datasz,
87 bool compat, struct arch_elf_state *arch);
88#endif
89
90#ifdef CONFIG_ARCH_HAVE_ELF_PROT
91int arch_elf_adjust_prot(int prot, const struct arch_elf_state *state,
92 bool has_interp, bool is_interp);
93#else
94static inline int arch_elf_adjust_prot(int prot,
95 const struct arch_elf_state *state,
96 bool has_interp, bool is_interp)
97{
98 return prot;
99}
100#endif
101
102#endif /* _LINUX_ELF_H */