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#if ELF_CLASS == ELFCLASS32
14#define Elf_Sword			Elf32_Sword
15#define elf_fdpic_loadseg		elf32_fdpic_loadseg
16#define elf_fdpic_loadmap		elf32_fdpic_loadmap
17#define ELF_FDPIC_LOADMAP_VERSION	ELF32_FDPIC_LOADMAP_VERSION
18#else
19#define Elf_Sword			Elf64_Sxword
20#define elf_fdpic_loadmap		elf64_fdpic_loadmap
21#define elf_fdpic_loadseg		elf64_fdpic_loadseg
22#define ELF_FDPIC_LOADMAP_VERSION	ELF64_FDPIC_LOADMAP_VERSION
23#endif
24
25/*
26 * binfmt binary parameters structure
27 */
28struct elf_fdpic_params {
29	struct elfhdr			hdr;		/* ref copy of ELF header */
30	struct elf_phdr			*phdrs;		/* ref copy of PT_PHDR table */
31	struct elf_fdpic_loadmap	*loadmap;	/* loadmap to be passed to userspace */
32	unsigned long			elfhdr_addr;	/* mapped ELF header user address */
33	unsigned long			ph_addr;	/* mapped PT_PHDR user address */
34	unsigned long			map_addr;	/* mapped loadmap user address */
35	unsigned long			entry_addr;	/* mapped entry user address */
36	unsigned long			stack_size;	/* stack size requested (PT_GNU_STACK) */
37	unsigned long			dynamic_addr;	/* mapped PT_DYNAMIC user address */
38	unsigned long			load_addr;	/* user address at which to map binary */
39	unsigned long			flags;
40#define ELF_FDPIC_FLAG_ARRANGEMENT	0x0000000f	/* PT_LOAD arrangement flags */
41#define ELF_FDPIC_FLAG_INDEPENDENT	0x00000000	/* PT_LOADs can be put anywhere */
42#define ELF_FDPIC_FLAG_HONOURVADDR	0x00000001	/* PT_LOAD.vaddr must be honoured */
43#define ELF_FDPIC_FLAG_CONSTDISP	0x00000002	/* PT_LOADs require constant
44							 * displacement */
45#define ELF_FDPIC_FLAG_CONTIGUOUS	0x00000003	/* PT_LOADs should be contiguous */
46#define ELF_FDPIC_FLAG_EXEC_STACK	0x00000010	/* T if stack to be executable */
47#define ELF_FDPIC_FLAG_NOEXEC_STACK	0x00000020	/* T if stack not to be executable */
48#define ELF_FDPIC_FLAG_EXECUTABLE	0x00000040	/* T if this object is the executable */
49#define ELF_FDPIC_FLAG_PRESENT		0x80000000	/* T if this object is present */
50};
51
52#ifdef CONFIG_MMU
53extern void elf_fdpic_arch_lay_out_mm(struct elf_fdpic_params *exec_params,
54				      struct elf_fdpic_params *interp_params,
55				      unsigned long *start_stack,
56				      unsigned long *start_brk);
57#endif
58
59#endif /* _LINUX_ELF_FDPIC_H */
60