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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
include/uapi/linux/elf.h
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@ -368,6 +368,7 @@ typedef struct elf64_shdr {
* Notes used in ET_CORE. Architectures export some of the arch register sets
* using the corresponding note types via the PTRACE_GETREGSET and
* PTRACE_SETREGSET requests.
* The note name for all these is "LINUX".
*/
#define NT_PRSTATUS 1
#define NT_PRFPREG 2
@ -430,6 +431,9 @@ typedef struct elf64_shdr {
#define NT_MIPS_FP_MODE 0x801 /* MIPS floating-point mode */
#define NT_MIPS_MSA 0x802 /* MIPS SIMD registers */
/* Note types with note name "GNU" */
#define NT_GNU_PROPERTY_TYPE_0 5
/* Note header in a PT_NOTE section */
typedef struct elf32_note {
Elf32_Word n_namesz; /* Name size */