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ELF: Add ELF program property parsing support

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ELF program properties will be needed for detecting whether to
enable optional architecture or ABI features for a new ELF process.

For now, there are no generic properties that we care about, so do
nothing unless CONFIG_ARCH_USE_GNU_PROPERTY=y.

Otherwise, the presence of properties using the PT_PROGRAM_PROPERTY
phdrs entry (if any), and notify each property to the arch code.

For now, the added code is not used.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Dave Martin <Dave.Martin@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 16:50:44 +00:00
committed by Catalin Marinas
parent db751e309f
commit 00e19ceec8
4 changed files with 154 additions and 0 deletions
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4
fs/compat_binfmt_elf.c
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@@ -17,6 +17,8 @@
#include <linux/elfcore-compat.h>
#include <linux/time.h>
#define ELF_COMPAT 1
/*
* Rename the basic ELF layout types to refer to the 32-bit class of files.
*/
@@ -28,11 +30,13 @@
#undef elf_shdr
#undef elf_note
#undef elf_addr_t
#undef ELF_GNU_PROPERTY_ALIGN
#define elfhdr elf32_hdr
#define elf_phdr elf32_phdr
#define elf_shdr elf32_shdr
#define elf_note elf32_note
#define elf_addr_t Elf32_Addr
#define ELF_GNU_PROPERTY_ALIGN ELF32_GNU_PROPERTY_ALIGN
/*
* Some data types as stored in coredump.