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