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 */