include/linux/elf.h

   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 */