core: asan: tag access for .ARM.extab and .ARM.exidx

The two sections .ARM.extab and .ARM.exidx are accessed when printing a stack trace. Tag access for these two sections to avoid recursive panics due to failing checks against shadow area. Tested-by: Jens Wiklander <[email protected]> (QEMU) Reviewed-by: Etienne Carriere <[email protected]> Reviewed-by: Jerome Forissier <[email protected]> Signed-off-by: Jens Wiklander <[email protected]>
OP-TEE · Sep 14, 2017 · 121e56f · 121e56f
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commit 121e56f
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diff --git a/core/arch/arm/include/kernel/linker.h b/core/arch/arm/include/kernel/linker.h
@@ -45,6 +45,8 @@
  */
 extern const uint8_t __exidx_start[];
 extern const uint8_t __exidx_end[];
+extern const uint8_t __extab_start[];
+extern const uint8_t __extab_end[];
 
 extern const struct pseudo_ta_head __start_ta_head_section;
 extern const struct pseudo_ta_head __stop_ta_head_section;

diff --git a/core/arch/arm/kernel/generic_boot.c b/core/arch/arm/kernel/generic_boot.c
@@ -346,6 +346,8 @@ static void init_asan(void)
 	asan_tag_access(&__ctor_list, &__ctor_end);
 	asan_tag_access(__rodata_start, __rodata_end);
 	asan_tag_access(__nozi_start, __nozi_end);
+	asan_tag_access(__exidx_start, __exidx_end);
+	asan_tag_access(__extab_start, __extab_end);
 
 	init_run_constructors();
 

diff --git a/core/arch/arm/kernel/link_dummy.ld b/core/arch/arm/kernel/link_dummy.ld
@@ -47,6 +47,8 @@ __end_phys_nsec_ddr_section = .;
 __end_phys_sdp_mem_section = .;
 __exidx_end = .;
 __exidx_start = .;
+__extab_end = .;
+__extab_start = .;
 __heap1_end = .;
 __heap1_start = .;
 __heap2_end = .;