diff options
| author | Ard Biesheuvel <ardb@kernel.org> | 2022-10-27 17:59:06 +0200 |
|---|---|---|
| committer | Will Deacon <will@kernel.org> | 2022-11-09 18:06:35 +0000 |
| commit | 68c76ad4a9571a2b603665c85cf8229bcf04982a (patch) | |
| tree | c3128c1e56df0d7ee4742775f6955b8a53092a64 /arch/arm64/Kconfig | |
| parent | f0c4d9fc9cc9462659728d168387191387e903cc (diff) | |
| download | linux-68c76ad4a9571a2b603665c85cf8229bcf04982a.tar.bz2 | |
arm64: unwind: add asynchronous unwind tables to kernel and modules
Enable asynchronous unwind table generation for both the core kernel as
well as modules, and emit the resulting .eh_frame sections as init code
so we can use the unwind directives for code patching at boot or module
load time.
This will be used by dynamic shadow call stack support, which will rely
on code patching rather than compiler codegen to emit the shadow call
stack push and pop instructions.
Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Sami Tolvanen <samitolvanen@google.com>
Tested-by: Sami Tolvanen <samitolvanen@google.com>
Link: https://lore.kernel.org/r/20221027155908.1940624-2-ardb@kernel.org
Signed-off-by: Will Deacon <will@kernel.org>
Diffstat (limited to 'arch/arm64/Kconfig')
| -rw-r--r-- | arch/arm64/Kconfig | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/arch/arm64/Kconfig b/arch/arm64/Kconfig index 505c8a1ccbe0..7e3a9cf2193d 100644 --- a/arch/arm64/Kconfig +++ b/arch/arm64/Kconfig @@ -370,6 +370,9 @@ config KASAN_SHADOW_OFFSET default 0xeffffff800000000 if ARM64_VA_BITS_36 && KASAN_SW_TAGS default 0xffffffffffffffff +config UNWIND_TABLES + bool + source "arch/arm64/Kconfig.platforms" menu "Kernel Features" |