/* SPDX-License-Identifier: GPL-2.0-or-later */
/* FDPIC ELF load map
 *
 * Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
 * Written by David Howells ([email protected])
 */

#ifndef _LINUX_ELF_FDPIC_H
#define _LINUX_ELF_FDPIC_H

#include <uapi/linux/elf-fdpic.h>

#if ELF_CLASS == ELFCLASS32
#define Elf_Sword            Elf32_Sword
#define elf_fdpic_loadseg        elf32_fdpic_loadseg
#define elf_fdpic_loadmap        elf32_fdpic_loadmap
#define ELF_FDPIC_LOADMAP_VERSION    ELF32_FDPIC_LOADMAP_VERSION
#else
#define Elf_Sword            Elf64_Sxword
#define elf_fdpic_loadmap        elf64_fdpic_loadmap
#define elf_fdpic_loadseg        elf64_fdpic_loadseg
#define ELF_FDPIC_LOADMAP_VERSION    ELF64_FDPIC_LOADMAP_VERSION
#endif

/*
 * binfmt binary parameters structure
 */
struct elf_fdpic_params {
    struct elfhdr            hdr;        /* ref copy of ELF header */
    struct elf_phdr            *phdrs;        /* ref copy of PT_PHDR table */
    struct elf_fdpic_loadmap    *loadmap;    /* loadmap to be passed to userspace */
    unsigned long            elfhdr_addr;    /* mapped ELF header user address */
    unsigned long            ph_addr;    /* mapped PT_PHDR user address */
    unsigned long            map_addr;    /* mapped loadmap user address */
    unsigned long            entry_addr;    /* mapped entry user address */
    unsigned long            stack_size;    /* stack size requested (PT_GNU_STACK) */
    unsigned long            dynamic_addr;    /* mapped PT_DYNAMIC user address */
    unsigned long            load_addr;    /* user address at which to map binary */
    unsigned long            flags;
#define ELF_FDPIC_FLAG_ARRANGEMENT    0x0000000f    /* PT_LOAD arrangement flags */
#define ELF_FDPIC_FLAG_INDEPENDENT    0x00000000    /* PT_LOADs can be put anywhere */
#define ELF_FDPIC_FLAG_HONOURVADDR    0x00000001    /* PT_LOAD.vaddr must be honoured */
#define ELF_FDPIC_FLAG_CONSTDISP    0x00000002    /* PT_LOADs require constant
                             * displacement */
#define ELF_FDPIC_FLAG_CONTIGUOUS    0x00000003    /* PT_LOADs should be contiguous */
#define ELF_FDPIC_FLAG_EXEC_STACK    0x00000010    /* T if stack to be executable */
#define ELF_FDPIC_FLAG_NOEXEC_STACK    0x00000020    /* T if stack not to be executable */
#define ELF_FDPIC_FLAG_EXECUTABLE    0x00000040    /* T if this object is the executable */
#define ELF_FDPIC_FLAG_PRESENT        0x80000000    /* T if this object is present */
};

#ifdef CONFIG_MMU
extern void elf_fdpic_arch_lay_out_mm(struct elf_fdpic_params *exec_params,
                      struct elf_fdpic_params *interp_params,
                      unsigned long *start_stack,
                      unsigned long *start_brk);
#endif

#endif /* _LINUX_ELF_FDPIC_H */