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