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lib: Add ASan support to ramstage on x86 arch

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This patch adds address sanitizer module to the library and reserves
a linker section representing the shadow region for ramstage. Also,
it adds an instruction to initialize shadow region on x86
architecture when ramstage is loaded.

Change-Id: Ica06bd2be78fcfc79fa888721ed920d4e8248f3b
Signed-off-by: Harshit Sharma <harshitsharmajs@gmail.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/42496
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
Reviewed-by: Werner Zeh <werner.zeh@siemens.com>
This commit is contained in:
Harshit Sharma
2020-06-17 20:19:00 -07:00
committed by Patrick Georgi
parent 3b9cc859ff
commit 9c88fb8df0
5 changed files with 523 additions and 19 deletions
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7
src/lib/program.ld
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@ -51,7 +51,7 @@
_etext = .;
} : to_load
#if ENV_RAMSTAGE && CONFIG(COVERAGE)
#if ENV_RAMSTAGE && (CONFIG(COVERAGE) || CONFIG(ASAN_IN_RAMSTAGE))
.ctors . : {
. = ALIGN(0x100);
__CTOR_LIST__ = .;
@ -126,6 +126,11 @@
}
#endif
#if ENV_RAMSTAGE && CONFIG(ASAN_IN_RAMSTAGE)
_shadow_size = (_eheap - _data) >> 3;
REGION(asan_shadow, ., _shadow_size, ARCH_POINTER_ALIGN_SIZE)
#endif
_eprogram = .;
/* Discard the sections we don't need/want */