linux/include/linux/elf-fdpic.h
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   1/* elf-fdpic.h: FDPIC ELF load map
   2 *
   3 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
   4 * Written by David Howells (dhowells@redhat.com)
   5 *
   6 * This program is free software; you can redistribute it and/or
   7 * modify it under the terms of the GNU General Public License
   8 * as published by the Free Software Foundation; either version
   9 * 2 of the License, or (at your option) any later version.
  10 */
  11
  12#ifndef _LINUX_ELF_FDPIC_H
  13#define _LINUX_ELF_FDPIC_H
  14
  15#include <linux/elf.h>
  16
  17#define PT_GNU_STACK    (PT_LOOS + 0x474e551)
  18
  19/* segment mappings for ELF FDPIC libraries/executables/interpreters */
  20struct elf32_fdpic_loadseg {
  21        Elf32_Addr      addr;           /* core address to which mapped */
  22        Elf32_Addr      p_vaddr;        /* VMA recorded in file */
  23        Elf32_Word      p_memsz;        /* allocation size recorded in file */
  24};
  25
  26struct elf32_fdpic_loadmap {
  27        Elf32_Half      version;        /* version of these structures, just in case... */
  28        Elf32_Half      nsegs;          /* number of segments */
  29        struct elf32_fdpic_loadseg segs[];
  30};
  31
  32#define ELF32_FDPIC_LOADMAP_VERSION     0x0000
  33
  34/*
  35 * binfmt binary parameters structure
  36 */
  37struct elf_fdpic_params {
  38        struct elfhdr                   hdr;            /* ref copy of ELF header */
  39        struct elf_phdr                 *phdrs;         /* ref copy of PT_PHDR table */
  40        struct elf32_fdpic_loadmap      *loadmap;       /* loadmap to be passed to userspace */
  41        unsigned long                   elfhdr_addr;    /* mapped ELF header user address */
  42        unsigned long                   ph_addr;        /* mapped PT_PHDR user address */
  43        unsigned long                   map_addr;       /* mapped loadmap user address */
  44        unsigned long                   entry_addr;     /* mapped entry user address */
  45        unsigned long                   stack_size;     /* stack size requested (PT_GNU_STACK) */
  46        unsigned long                   dynamic_addr;   /* mapped PT_DYNAMIC user address */
  47        unsigned long                   load_addr;      /* user address at which to map binary */
  48        unsigned long                   flags;
  49#define ELF_FDPIC_FLAG_ARRANGEMENT      0x0000000f      /* PT_LOAD arrangement flags */
  50#define ELF_FDPIC_FLAG_INDEPENDENT      0x00000000      /* PT_LOADs can be put anywhere */
  51#define ELF_FDPIC_FLAG_HONOURVADDR      0x00000001      /* PT_LOAD.vaddr must be honoured */
  52#define ELF_FDPIC_FLAG_CONSTDISP        0x00000002      /* PT_LOADs require constant
  53                                                         * displacement */
  54#define ELF_FDPIC_FLAG_CONTIGUOUS       0x00000003      /* PT_LOADs should be contiguous */
  55#define ELF_FDPIC_FLAG_EXEC_STACK       0x00000010      /* T if stack to be executable */
  56#define ELF_FDPIC_FLAG_NOEXEC_STACK     0x00000020      /* T if stack not to be executable */
  57#define ELF_FDPIC_FLAG_EXECUTABLE       0x00000040      /* T if this object is the executable */
  58#define ELF_FDPIC_FLAG_PRESENT          0x80000000      /* T if this object is present */
  59};
  60
  61#ifdef __KERNEL__
  62#ifdef CONFIG_MMU
  63extern void elf_fdpic_arch_lay_out_mm(struct elf_fdpic_params *exec_params,
  64                                      struct elf_fdpic_params *interp_params,
  65                                      unsigned long *start_stack,
  66                                      unsigned long *start_brk);
  67#endif
  68#endif /* __KERNEL__ */
  69
  70#endif /* _LINUX_ELF_FDPIC_H */
  71
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