From 0e45f92d3befc07eb33d9dbb51c4409daa3eede3 Mon Sep 17 00:00:00 2001
From: cepetr <petr@cerninovi.cz>
Date: Sun, 18 Aug 2024 12:00:30 +0200
Subject: [PATCH] refactor(core/embed): move __stack_chk_fail to a better
 location

[no changelog]
---
 core/embed/lib/error_handling.c       | 8 ++++++++
 core/embed/trezorhal/stm32f4/common.c | 6 ------
 core/embed/trezorhal/stm32u5/common.c | 6 ------
 3 files changed, 8 insertions(+), 12 deletions(-)

diff --git a/core/embed/lib/error_handling.c b/core/embed/lib/error_handling.c
index 266df4f59a..1f22317603 100644
--- a/core/embed/lib/error_handling.c
+++ b/core/embed/lib/error_handling.c
@@ -38,6 +38,14 @@
 #define COLOR_FATAL_ERROR COLOR_BLACK
 #endif
 
+uint32_t __stack_chk_guard = 0;
+
+// Calls to this function are inserted by the compiler
+// when stack protection is enabled.
+void __attribute__((noreturn, used)) __stack_chk_fail(void) {
+  error_shutdown("(SS)");
+}
+
 void __attribute__((noreturn))
 error_shutdown_ex(const char *title, const char *message, const char *footer) {
   if (title == NULL) {
diff --git a/core/embed/trezorhal/stm32f4/common.c b/core/embed/trezorhal/stm32f4/common.c
index 327344525a..339de06384 100644
--- a/core/embed/trezorhal/stm32f4/common.c
+++ b/core/embed/trezorhal/stm32f4/common.c
@@ -36,12 +36,6 @@
 #include "backlight_pwm.h"
 #endif
 
-uint32_t __stack_chk_guard = 0;
-
-void __attribute__((noreturn)) __stack_chk_fail(void) {
-  error_shutdown("(SS)");
-}
-
 // reference RM0090 section 35.12.1 Figure 413
 #define USB_OTG_HS_DATA_FIFO_RAM (USB_OTG_HS_PERIPH_BASE + 0x20000U)
 #define USB_OTG_HS_DATA_FIFO_SIZE (4096U)
diff --git a/core/embed/trezorhal/stm32u5/common.c b/core/embed/trezorhal/stm32u5/common.c
index b6e189b0bf..abf3d943f6 100644
--- a/core/embed/trezorhal/stm32u5/common.c
+++ b/core/embed/trezorhal/stm32u5/common.c
@@ -32,12 +32,6 @@
 
 #include "stm32u5xx_ll_utils.h"
 
-uint32_t __stack_chk_guard = 0;
-
-void __attribute__((noreturn)) __stack_chk_fail(void) {
-  error_shutdown("(SS)");
-}
-
 void invalidate_firmware(void) {
   // on stm32u5, we need to disable the instruction cache before erasing the
   // firmware - otherwise, the write check will fail