[XS] Change in coreboot[main]: libpayload: Move ttb_buffer to a standalone section

[Yi Chou (Code Review)]

Yi Chou has uploaded this change for review. ( https://review.coreboot.org/c/coreboot/+/79078?usp=email )

Change subject: libpayload: Move ttb_buffer to a standalone section
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libpayload: Move ttb_buffer to a standalone section

When cleaning the sensitive data in the memory, we will want to prevent
zero out the content of tbb_buffer. Move the ttb_buffer to a standalone
section will simplify the problem.

BUG=b:248610274
TEST=emerge-cherry libpayload
BRANCH=none

Change-Id: I610276cbe30552263d791860c15e5ad9a201c744
Signed-off-by: Yi Chou 
---
M payloads/libpayload/arch/arm64/mmu.c
1 file changed, 1 insertion(+), 1 deletion(-)

git pull ssh://review.coreboot.org:29418/coreboot refs/changes/78/79078/1

diff --git a/payloads/libpayload/arch/arm64/mmu.c b/payloads/libpayload/arch/arm64/mmu.c
index 4c8f8c1..8823cc0 100644
--- a/payloads/libpayload/arch/arm64/mmu.c
+++ b/payloads/libpayload/arch/arm64/mmu.c
@@ -41,7 +41,7 @@
 static uint64_t *xlat_addr;

static int free_idx;
-static uint8_t ttb_buffer[TTB_DEFAULT_SIZE] __attribute__((aligned(GRANULE_SIZE)));
+static uint8_t ttb_buffer[TTB_DEFAULT_SIZE] __attribute__((aligned(GRANULE_SIZE),section(".ttb_buffer")));

static const char * const tag_to_string[] = {
    [TYPE_NORMAL_MEM] = "normal",