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#ifndef START_THREAD
26#define START_THREAD(elf_ex, regs, elf_entry, start_stack) \
27 start_thread(regs, elf_entry, start_stack)
28#endif
29
30#if defined(ARCH_HAS_SETUP_ADDITIONAL_PAGES) && !defined(ARCH_SETUP_ADDITIONAL_PAGES)
31#define ARCH_SETUP_ADDITIONAL_PAGES(bprm, ex, interpreter) \
32 arch_setup_additional_pages(bprm, interpreter)
33#endif
34
35#define ELF32_GNU_PROPERTY_ALIGN 4
36#define ELF64_GNU_PROPERTY_ALIGN 8
37
38#if ELF_CLASS == ELFCLASS32
39
40extern Elf32_Dyn _DYNAMIC [];
41#define elfhdr elf32_hdr
42#define elf_phdr elf32_phdr
43#define elf_shdr elf32_shdr
44#define elf_note elf32_note
45#define elf_addr_t Elf32_Off
46#define Elf_Half Elf32_Half
47#define Elf_Word Elf32_Word
48#define ELF_GNU_PROPERTY_ALIGN ELF32_GNU_PROPERTY_ALIGN
49
50#else
51
52extern Elf64_Dyn _DYNAMIC [];
53#define elfhdr elf64_hdr
54#define elf_phdr elf64_phdr
55#define elf_shdr elf64_shdr
56#define elf_note elf64_note
57#define elf_addr_t Elf64_Off
58#define Elf_Half Elf64_Half
59#define Elf_Word Elf64_Word
60#define ELF_GNU_PROPERTY_ALIGN ELF64_GNU_PROPERTY_ALIGN
61
62#endif
63
64/* Optional callbacks to write extra ELF notes. */
65struct file;
66struct coredump_params;
67
68#ifndef CONFIG_ARCH_HAVE_EXTRA_ELF_NOTES
69static inline int elf_coredump_extra_notes_size(void) { return 0; }
70static inline int elf_coredump_extra_notes_write(struct coredump_params *cprm) { return 0; }
71#else
72extern int elf_coredump_extra_notes_size(void);
73extern int elf_coredump_extra_notes_write(struct coredump_params *cprm);
74#endif
75
76/*
77 * NT_GNU_PROPERTY_TYPE_0 header:
78 * Keep this internal until/unless there is an agreed UAPI definition.
79 * pr_type values (GNU_PROPERTY_*) are public and defined in the UAPI header.
80 */
81struct gnu_property {
82 u32 pr_type;
83 u32 pr_datasz;
84};
85
86struct arch_elf_state;
87
88#ifndef CONFIG_ARCH_USE_GNU_PROPERTY
89static inline int arch_parse_elf_property(u32 type, const void *data,
90 size_t datasz, bool compat,
91 struct arch_elf_state *arch)
92{
93 return 0;
94}
95#else
96extern int arch_parse_elf_property(u32 type, const void *data, size_t datasz,
97 bool compat, struct arch_elf_state *arch);
98#endif
99
100#ifdef CONFIG_ARCH_HAVE_ELF_PROT
101int arch_elf_adjust_prot(int prot, const struct arch_elf_state *state,
102 bool has_interp, bool is_interp);
103#else
104static inline int arch_elf_adjust_prot(int prot,
105 const struct arch_elf_state *state,
106 bool has_interp, bool is_interp)
107{
108 return prot;
109}
110#endif
111
112#endif /* _LINUX_ELF_H */
113