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author | Francis Rowe <info@gluglug.org.uk> | 2015-11-06 02:45:49 (EST) |
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committer | Francis Rowe <info@gluglug.org.uk> | 2015-11-06 03:01:51 (EST) |
commit | 60453ff2cbd1befe24959fba1d24f734406444e3 (patch) | |
tree | 74a6080455b2b00184fbc4a00503188032773986 /resources/libreboot/patch/kgpe-d16/0038-cpu-amd-car-Add-romstage-BSP-stack-overrun-detection.patch | |
parent | 51f5487e7d2c8809bdc7690fe26948064257b34d (diff) | |
download | libreboot-60453ff2cbd1befe24959fba1d24f734406444e3.zip libreboot-60453ff2cbd1befe24959fba1d24f734406444e3.tar.gz libreboot-60453ff2cbd1befe24959fba1d24f734406444e3.tar.bz2 |
Update coreboot to new version (use latest stable kgpe-d16 tree)
Diffstat (limited to 'resources/libreboot/patch/kgpe-d16/0038-cpu-amd-car-Add-romstage-BSP-stack-overrun-detection.patch')
-rw-r--r-- | resources/libreboot/patch/kgpe-d16/0038-cpu-amd-car-Add-romstage-BSP-stack-overrun-detection.patch | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/resources/libreboot/patch/kgpe-d16/0038-cpu-amd-car-Add-romstage-BSP-stack-overrun-detection.patch b/resources/libreboot/patch/kgpe-d16/0038-cpu-amd-car-Add-romstage-BSP-stack-overrun-detection.patch new file mode 100644 index 0000000..5300db1 --- /dev/null +++ b/resources/libreboot/patch/kgpe-d16/0038-cpu-amd-car-Add-romstage-BSP-stack-overrun-detection.patch @@ -0,0 +1,59 @@ +From ed27521eaee0dd334c658fb68d0c8ebaa6a126cc Mon Sep 17 00:00:00 2001 +From: Timothy Pearson <tpearson@raptorengineeringinc.com> +Date: Mon, 1 Jun 2015 23:58:59 -0500 +Subject: [PATCH 038/143] cpu/amd/car: Add romstage BSP stack overrun + detection + +Change-Id: Ia2e8f99be9df388e492a633c49df21ca1c57ba13 +Signed-off-by: Timothy Pearson <tpearson@raptorengineeringinc.com> +--- + src/cpu/amd/car/cache_as_ram.inc | 6 +++++- + src/cpu/amd/car/post_cache_as_ram.c | 8 ++++++++ + 2 files changed, 13 insertions(+), 1 deletion(-) + +diff --git a/src/cpu/amd/car/cache_as_ram.inc b/src/cpu/amd/car/cache_as_ram.inc +index 6542906..4ccde3f 100644 +--- a/src/cpu/amd/car/cache_as_ram.inc ++++ b/src/cpu/amd/car/cache_as_ram.inc +@@ -24,7 +24,7 @@ + #include <cpu/amd/mtrr.h> + + #define CacheSize CONFIG_DCACHE_RAM_SIZE +-#define CacheBase (0xd0000 - CacheSize) ++#define CacheBase CONFIG_DCACHE_RAM_BASE + #define CacheSizeBSPStack CONFIG_DCACHE_BSP_STACK_SIZE + #define CacheSizeBSPSlush CONFIG_DCACHE_BSP_STACK_SLUSH + +@@ -473,6 +473,10 @@ fam10_end_part1: + movl $(CacheBase + CacheSize), %eax + movl %eax, %esp + ++ /* Poison the lower stack boundary */ ++ movl $((CacheBase + CacheSize) - CacheSizeBSPStack), %eax ++ movl $0xdeadbeef, (%eax) ++ + post_code(0xa3) + + jmp CAR_FAM10_ap_out +diff --git a/src/cpu/amd/car/post_cache_as_ram.c b/src/cpu/amd/car/post_cache_as_ram.c +index 257b41a..787bedd 100644 +--- a/src/cpu/amd/car/post_cache_as_ram.c ++++ b/src/cpu/amd/car/post_cache_as_ram.c +@@ -110,6 +110,14 @@ void post_cache_as_ram(void) + void *resume_backup_memory = NULL; + uint32_t family = amd_fam1x_cpu_family(); + ++ /* Verify that the BSP didn't overrun the lower stack ++ * boundary during romstage execution ++ */ ++ volatile uint32_t *lower_stack_boundary; ++ lower_stack_boundary = (void *)((CONFIG_DCACHE_RAM_BASE + CONFIG_DCACHE_RAM_SIZE) - CONFIG_STACK_SIZE); ++ if ((*lower_stack_boundary) != 0xdeadbeef) ++ printk(BIOS_WARNING, "BSP overran lower stack boundary. Undefined behaviour may result!\n"); ++ + struct romstage_handoff *handoff; + handoff = romstage_handoff_find_or_add(); + if (handoff != NULL) +-- +1.7.9.5 + |