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ELF: UAPI and Kconfig additions for ELF program properties

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Pull the basic ELF definitions relating to the
NT_GNU_PROPERTY_TYPE_0 note from Yu-Cheng Yu's earlier x86 shstk
series.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Dave Martin <Dave.Martin@arm.com>
Signed-off-by: Yu-cheng Yu <yu-cheng.yu@intel.com>
Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Reviewed-by: Kees Cook <keescook@chromium.org>
Signed-off-by: Catalin Marinas <catalin.marinas@arm.com>
This commit is contained in:
Dave Martin 2020-03-16 16:50:43 +00:00 committed by Catalin Marinas
parent f8788d86ab
commit db751e309f
3 changed files with 16 additions and 0 deletions
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3
fs/Kconfig.binfmt
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@ -36,6 +36,9 @@ config COMPAT_BINFMT_ELF
config ARCH_BINFMT_ELF_STATE
bool
config ARCH_USE_GNU_PROPERTY
bool
config BINFMT_ELF_FDPIC
bool "Kernel support for FDPIC ELF binaries"
default y if !BINFMT_ELF

12
include/linux/elf.h
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@ -2,6 +2,7 @@
#ifndef _LINUX_ELF_H
#define _LINUX_ELF_H
#include <linux/types.h>
#include <asm/elf.h>
#include <uapi/linux/elf.h>
@ -56,4 +57,15 @@ static inline int elf_coredump_extra_notes_write(struct coredump_params *cprm) {
extern int elf_coredump_extra_notes_size(void);
extern int elf_coredump_extra_notes_write(struct coredump_params *cprm);
#endif
/*
* NT_GNU_PROPERTY_TYPE_0 header:
* Keep this internal until/unless there is an agreed UAPI definition.
* pr_type values (GNU_PROPERTY_*) are public and defined in the UAPI header.
*/
struct gnu_property {
u32 pr_type;
u32 pr_datasz;
};
#endif /* _LINUX_ELF_H */

1
include/uapi/linux/elf.h
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@ -36,6 +36,7 @@ typedef __s64 Elf64_Sxword;
#define PT_LOPROC 0x70000000
#define PT_HIPROC 0x7fffffff
#define PT_GNU_EH_FRAME 0x6474e550
#define PT_GNU_PROPERTY 0x6474e553
#define PT_GNU_STACK (PT_LOOS + 0x474e551)