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 
40 extern 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 
52 extern 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. */
65 struct file;
66 struct coredump_params;
67 
68 #ifndef ARCH_HAVE_EXTRA_ELF_NOTES
elf_coredump_extra_notes_size(void)69 static inline int elf_coredump_extra_notes_size(void) { return 0; }
elf_coredump_extra_notes_write(struct coredump_params * cprm)70 static inline int elf_coredump_extra_notes_write(struct coredump_params *cprm) { return 0; }
71 #else
72 extern int elf_coredump_extra_notes_size(void);
73 extern 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  */
81 struct gnu_property {
82 	u32 pr_type;
83 	u32 pr_datasz;
84 };
85 
86 struct arch_elf_state;
87 
88 #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)89 static 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
96 extern 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
101 int arch_elf_adjust_prot(int prot, const struct arch_elf_state *state,
102 			 bool has_interp, bool is_interp);
103 #else
arch_elf_adjust_prot(int prot,const struct arch_elf_state * state,bool has_interp,bool is_interp)104 static 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