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b922bf04d2
The binfmt_flat_fdpic code has a number of 32-bit specific data structures associated with it. Extend it to be able to support and be used on 64-bit systems as well. The new code defines a number of key 64-bit variants of the core elf-fdpic data structures - along side the existing 32-bit sized ones. A common set of generic named structures are defined to be either the 32-bit or 64-bit ones as required at compile time. This is a similar technique to that used in the ELF binfmt loader. For example: elf_fdpic_loadseg is either elf32_fdpic_loadseg or elf64_fdpic_loadseg elf_fdpic_loadmap is either elf32_fdpic_loadmap or elf64_fdpic_loadmap the choice based on ELFCLASS32 or ELFCLASS64. Signed-off-by: Greg Ungerer <gerg@kernel.org> Acked-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20230711130754.481209-2-gerg@kernel.org Signed-off-by: Palmer Dabbelt <palmer@rivosinc.com>
59 lines
2.4 KiB
C
59 lines
2.4 KiB
C
/* SPDX-License-Identifier: GPL-2.0-or-later */
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/* FDPIC ELF load map
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*
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* Copyright (C) 2003 Red Hat, Inc. All Rights Reserved.
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* Written by David Howells (dhowells@redhat.com)
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*/
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#ifndef _LINUX_ELF_FDPIC_H
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#define _LINUX_ELF_FDPIC_H
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#include <uapi/linux/elf-fdpic.h>
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#if ELF_CLASS == ELFCLASS32
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#define Elf_Sword Elf32_Sword
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#define elf_fdpic_loadseg elf32_fdpic_loadseg
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#define elf_fdpic_loadmap elf32_fdpic_loadmap
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#define ELF_FDPIC_LOADMAP_VERSION ELF32_FDPIC_LOADMAP_VERSION
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#else
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#define Elf_Sword Elf64_Sxword
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#define elf_fdpic_loadmap elf64_fdpic_loadmap
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#define elf_fdpic_loadseg elf64_fdpic_loadseg
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#define ELF_FDPIC_LOADMAP_VERSION ELF64_FDPIC_LOADMAP_VERSION
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#endif
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/*
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* binfmt binary parameters structure
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*/
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struct elf_fdpic_params {
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struct elfhdr hdr; /* ref copy of ELF header */
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struct elf_phdr *phdrs; /* ref copy of PT_PHDR table */
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struct elf_fdpic_loadmap *loadmap; /* loadmap to be passed to userspace */
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unsigned long elfhdr_addr; /* mapped ELF header user address */
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unsigned long ph_addr; /* mapped PT_PHDR user address */
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unsigned long map_addr; /* mapped loadmap user address */
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unsigned long entry_addr; /* mapped entry user address */
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unsigned long stack_size; /* stack size requested (PT_GNU_STACK) */
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unsigned long dynamic_addr; /* mapped PT_DYNAMIC user address */
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unsigned long load_addr; /* user address at which to map binary */
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unsigned long flags;
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#define ELF_FDPIC_FLAG_ARRANGEMENT 0x0000000f /* PT_LOAD arrangement flags */
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#define ELF_FDPIC_FLAG_INDEPENDENT 0x00000000 /* PT_LOADs can be put anywhere */
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#define ELF_FDPIC_FLAG_HONOURVADDR 0x00000001 /* PT_LOAD.vaddr must be honoured */
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#define ELF_FDPIC_FLAG_CONSTDISP 0x00000002 /* PT_LOADs require constant
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* displacement */
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#define ELF_FDPIC_FLAG_CONTIGUOUS 0x00000003 /* PT_LOADs should be contiguous */
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#define ELF_FDPIC_FLAG_EXEC_STACK 0x00000010 /* T if stack to be executable */
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#define ELF_FDPIC_FLAG_NOEXEC_STACK 0x00000020 /* T if stack not to be executable */
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#define ELF_FDPIC_FLAG_EXECUTABLE 0x00000040 /* T if this object is the executable */
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#define ELF_FDPIC_FLAG_PRESENT 0x80000000 /* T if this object is present */
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};
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#ifdef CONFIG_MMU
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extern void elf_fdpic_arch_lay_out_mm(struct elf_fdpic_params *exec_params,
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struct elf_fdpic_params *interp_params,
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unsigned long *start_stack,
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unsigned long *start_brk);
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#endif
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#endif /* _LINUX_ELF_FDPIC_H */
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