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[PATCH v5 3/4] xen: arm: enable stack protector feature
- To: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>
- From: Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Date: Thu, 13 Feb 2025 22:00:27 +0000
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- Cc: Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Julien Grall <julien@xxxxxxx>, Bertrand Marquis <bertrand.marquis@xxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Volodymyr Babchuk <Volodymyr_Babchuk@xxxxxxxx>
- Delivery-date: Thu, 13 Feb 2025 22:00:41 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
- Thread-index: AQHbfmKwZ00k4YYKH0WPipI2HVN66Q==
- Thread-topic: [PATCH v5 3/4] xen: arm: enable stack protector feature
Enable previously added CONFIG_STACK_PROTECTOR feature for ARM
platform. Initialize stack protector very early, at the very beginning
of start_xen() function.
Signed-off-by: Volodymyr Babchuk <volodymyr_babchuk@xxxxxxxx>
---
Changes in v5:
- Call boot_stack_chk_guard_setup() from start_xen()
instead of early ASM
---
xen/arch/arm/Kconfig | 1 +
xen/arch/arm/setup.c | 3 +++
2 files changed, 4 insertions(+)
diff --git a/xen/arch/arm/Kconfig b/xen/arch/arm/Kconfig
index a26d3e1182..8f1a3c7d74 100644
--- a/xen/arch/arm/Kconfig
+++ b/xen/arch/arm/Kconfig
@@ -16,6 +16,7 @@ config ARM
select GENERIC_UART_INIT
select HAS_ALTERNATIVE if HAS_VMAP
select HAS_DEVICE_TREE
+ select HAS_STACK_PROTECTOR
select HAS_UBSAN
config ARCH_DEFCONFIG
diff --git a/xen/arch/arm/setup.c b/xen/arch/arm/setup.c
index c1f2d1b89d..0dca691207 100644
--- a/xen/arch/arm/setup.c
+++ b/xen/arch/arm/setup.c
@@ -30,6 +30,7 @@
#include <xen/virtual_region.h>
#include <xen/version.h>
#include <xen/vmap.h>
+#include <xen/stack-protector.h>
#include <xen/trace.h>
#include <xen/libfdt/libfdt-xen.h>
#include <xen/acpi.h>
@@ -305,6 +306,8 @@ void asmlinkage __init start_xen(unsigned long fdt_paddr)
struct domain *d;
int rc, i;
+ boot_stack_chk_guard_setup();
+
dcache_line_bytes = read_dcache_line_bytes();
percpu_init_areas();
--
2.47.1
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