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#define ELF32_GNU_PROPERTY_ALIGN        4
  26#define ELF64_GNU_PROPERTY_ALIGN        8
  27
  28#if ELF_CLASS == ELFCLASS32
  29
  30extern 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
  42extern 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. */
  55struct file;
  56struct coredump_params;
  57
  58#ifndef ARCH_HAVE_EXTRA_ELF_NOTES
  59static inline int elf_coredump_extra_notes_size(void) { return 0; }
  60static inline int elf_coredump_extra_notes_write(struct coredump_params *cprm) { return 0; }
  61#else
  62extern int elf_coredump_extra_notes_size(void);
  63extern 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 */
  71struct gnu_property {
  72        u32 pr_type;
  73        u32 pr_datasz;
  74};
  75
  76struct arch_elf_state;
  77
  78#ifndef CONFIG_ARCH_USE_GNU_PROPERTY
  79static 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
  86extern 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
  91int arch_elf_adjust_prot(int prot, const struct arch_elf_state *state,
  92                         bool has_interp, bool is_interp);
  93#else
  94static 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