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 59 static inline int elf_coredump_extra_notes_size(void) { return 0; } 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 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 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