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  */
  16 struct 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
  41 extern 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 */