include/linux/elf-fdpic.h

   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 */
  20 struct 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
  26 struct 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  */
  37 struct 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 CONFIG_MMU
  62 extern void elf_fdpic_arch_lay_out_mm(struct elf_fdpic_params *exec_params,
  63                                       struct elf_fdpic_params *interp_params,
  64                                       unsigned long *start_stack,
  65                                       unsigned long *start_brk);
  66 #endif
  67
  68 #endif /* _LINUX_ELF_FDPIC_H */