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
30 extern 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
42 extern 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. */
55 struct file;
56 struct coredump_params;
57
58 #ifndef ARCH_HAVE_EXTRA_ELF_NOTES
elf_coredump_extra_notes_size(void)59 static inline int elf_coredump_extra_notes_size(void) { return 0; }
elf_coredump_extra_notes_write(struct coredump_params * cprm)60 static inline int elf_coredump_extra_notes_write(struct coredump_params *cprm) { return 0; }
61 #else
62 extern int elf_coredump_extra_notes_size(void);
63 extern 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 */
71 struct gnu_property {
72 u32 pr_type;
73 u32 pr_datasz;
74 };
75
76 struct arch_elf_state;
77
78 #ifndef CONFIG_ARCH_USE_GNU_PROPERTY
arch_parse_elf_property(u32 type,const void * data,size_t datasz,bool compat,struct arch_elf_state * arch)79 static 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
86 extern 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
91 int arch_elf_adjust_prot(int prot, const struct arch_elf_state *state,
92 bool has_interp, bool is_interp);
93 #else
arch_elf_adjust_prot(int prot,const struct arch_elf_state * state,bool has_interp,bool is_interp)94 static 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 */
103