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