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| author | Harshit Sharma <harshitsharmajs@gmail.com> | 2020-07-20 00:21:05 -0700 |
|---|---|---|
| committer | Patrick Georgi <pgeorgi@google.com> | 2020-08-21 07:41:19 +0000 |
| commit | a6ebe08333dcc6c263b6bb8936d4883663c63798 (patch) | |
| tree | 8f06ee5f79cf4efb54f189c17512a6120d2edd40 /src/arch/x86 | |
| parent | 9c88fb8df0005dc60e6c62778b4f16313cb3308e (diff) | |
lib: Add ASan support to romstage on x86 arch
This patch adds ASan support to romstage on x86 architecture.
A Kconfig option is added to enable ASan in romstage. Compiler
flags are updated. A memory space representing the shadow region
is reserved in linker section. And a function call to asan_init()
is added to initialize shadow region when romstage loads.
Change-Id: I67ebfb5e8d602e865b1f5c874860861ae4e54381
Signed-off-by: Harshit Sharma <harshitsharmajs@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/43604
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
Diffstat (limited to 'src/arch/x86')
| -rw-r--r-- | src/arch/x86/assembly_entry.S | 4 | ||||
| -rw-r--r-- | src/arch/x86/car.ld | 6 |
2 files changed, 9 insertions, 1 deletions
diff --git a/src/arch/x86/assembly_entry.S b/src/arch/x86/assembly_entry.S index fb48469c55..0d8307bb1f 100644 --- a/src/arch/x86/assembly_entry.S +++ b/src/arch/x86/assembly_entry.S @@ -49,6 +49,10 @@ debug_spinloop: #if CONFIG(IDT_IN_EVERY_STAGE) call exception_init #endif + +#if CONFIG(ASAN_IN_ROMSTAGE) + call asan_init +#endif call car_stage_entry /* Expect to never return. */ diff --git a/src/arch/x86/car.ld b/src/arch/x86/car.ld index 17b774845b..eabe87380a 100644 --- a/src/arch/x86/car.ld +++ b/src/arch/x86/car.ld @@ -72,8 +72,12 @@ *(.sbss.*) . = ALIGN(ARCH_POINTER_ALIGN_SIZE); _ebss = .; - _car_unallocated_start = .; +#if ENV_ROMSTAGE && CONFIG(ASAN_IN_ROMSTAGE) + _shadow_size = (_ebss - _car_region_start) >> 3; + REGION(asan_shadow, ., _shadow_size, ARCH_POINTER_ALIGN_SIZE) +#endif + _car_unallocated_start = .; _car_region_end = . + CONFIG_DCACHE_RAM_SIZE - (. - _car_region_start); } . = _car_region_end; |