LXR linux/include/linux/elf-fdpic.h

   1/* SPDX-License-Identifier: GPL-2.0-or-later */
   2/* FDPIC ELF load map
   3 *
   4 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
   5 * Written by David Howells (dhowells@redhat.com)
   6 */
   7
   8#ifndef _LINUX_ELF_FDPIC_H
   9#define _LINUX_ELF_FDPIC_H
  10
  11#include <uapi/linux/elf-fdpic.h>
  12
  13/*
  14 * binfmt binary parameters structure
  15 */
  16struct elf_fdpic_params {
  17        struct elfhdr                   hdr;            /* ref copy of ELF header */
  18        struct elf_phdr                 *phdrs;         /* ref copy of PT_PHDR table */
  19        struct elf32_fdpic_loadmap      *loadmap;       /* loadmap to be passed to userspace */
  20        unsigned long                   elfhdr_addr;    /* mapped ELF header user address */
  21        unsigned long                   ph_addr;        /* mapped PT_PHDR user address */
  22        unsigned long                   map_addr;       /* mapped loadmap user address */
  23        unsigned long                   entry_addr;     /* mapped entry user address */
  24        unsigned long                   stack_size;     /* stack size requested (PT_GNU_STACK) */
  25        unsigned long                   dynamic_addr;   /* mapped PT_DYNAMIC user address */
  26        unsigned long                   load_addr;      /* user address at which to map binary */
  27        unsigned long                   flags;
  28#define ELF_FDPIC_FLAG_ARRANGEMENT      0x0000000f      /* PT_LOAD arrangement flags */
  29#define ELF_FDPIC_FLAG_INDEPENDENT      0x00000000      /* PT_LOADs can be put anywhere */
  30#define ELF_FDPIC_FLAG_HONOURVADDR      0x00000001      /* PT_LOAD.vaddr must be honoured */
  31#define ELF_FDPIC_FLAG_CONSTDISP        0x00000002      /* PT_LOADs require constant
  32                                                         * displacement */
  33#define ELF_FDPIC_FLAG_CONTIGUOUS       0x00000003      /* PT_LOADs should be contiguous */
  34#define ELF_FDPIC_FLAG_EXEC_STACK       0x00000010      /* T if stack to be executable */
  35#define ELF_FDPIC_FLAG_NOEXEC_STACK     0x00000020      /* T if stack not to be executable */
  36#define ELF_FDPIC_FLAG_EXECUTABLE       0x00000040      /* T if this object is the executable */
  37#define ELF_FDPIC_FLAG_PRESENT          0x80000000      /* T if this object is present */
  38};
  39
  40#ifdef CONFIG_MMU
  41extern void elf_fdpic_arch_lay_out_mm(struct elf_fdpic_params *exec_params,
  42                                      struct elf_fdpic_params *interp_params,
  43                                      unsigned long *start_stack,
  44                                      unsigned long *start_brk);
  45#endif
  46
  47#endif /* _LINUX_ELF_FDPIC_H */
  48