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| author | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2011-08-09 08:12:47 +0000 |
|---|---|---|
| committer | gdisirio <gdisirio@35acf78f-673a-0410-8e92-d51de3d6d3f4> | 2011-08-09 08:12:47 +0000 |
| commit | cbcbaa0efe3d252cf3e6ec33b9c617d738aee565 (patch) | |
| tree | 5a2723bb55260c11bf57b8edcd47d999b952c352 /os/ports/GCC/ARMCMx/crt0.c | |
| parent | cd7e1aa36d2803e88a32c2d7d3f253ddfd04c0f4 (diff) | |
| download | ChibiOS-cbcbaa0efe3d252cf3e6ec33b9c617d738aee565.tar.gz ChibiOS-cbcbaa0efe3d252cf3e6ec33b9c617d738aee565.tar.bz2 ChibiOS-cbcbaa0efe3d252cf3e6ec33b9c617d738aee565.zip | |
git-svn-id: svn://svn.code.sf.net/p/chibios/svn/trunk@3213 35acf78f-673a-0410-8e92-d51de3d6d3f4
Diffstat (limited to 'os/ports/GCC/ARMCMx/crt0.c')
| -rw-r--r-- | os/ports/GCC/ARMCMx/crt0.c | 84 |
1 files changed, 68 insertions, 16 deletions
diff --git a/os/ports/GCC/ARMCMx/crt0.c b/os/ports/GCC/ARMCMx/crt0.c index 73dca119e..6e4524fa9 100644 --- a/os/ports/GCC/ARMCMx/crt0.c +++ b/os/ports/GCC/ARMCMx/crt0.c @@ -25,7 +25,7 @@ * @{
*/
-#include "chtypes.h"
+#include <stdint.h>
#define FALSE 0
#define TRUE (!FALSE)
@@ -39,45 +39,80 @@ typedef funcp_t * funcpp_t; * stack (dual stack mode).
*/
#if !defined(CRT0_CONTROL_INIT) || defined(__DOXYGEN__)
-#define CRT0_CONTROL_INIT 0x00000002
+#define CRT0_CONTROL_INIT 0x00000002
+#endif
+
+/**
+ * @brief Stack segments initialization switch.
+ */
+#if !defined(CRT0_STACKS_FILL_PATTERN) || defined(__DOXYGEN__)
+#define CRT0_STACKS_FILL_PATTERN 0x55555555
+#endif
+
+/**
+ * @brief Stack segments initialization switch.
+ */
+#if !defined(CRT0_INIT_STACKS) || defined(__DOXYGEN__)
+#define CRT0_INIT_STACKS TRUE
#endif
/**
* @brief DATA segment initialization switch.
*/
#if !defined(CRT0_INIT_DATA) || defined(__DOXYGEN__)
-#define CRT0_INIT_DATA TRUE
+#define CRT0_INIT_DATA TRUE
#endif
/**
* @brief BSS segment initialization switch.
*/
#if !defined(CRT0_INIT_BSS) || defined(__DOXYGEN__)
-#define CRT0_INIT_BSS TRUE
+#define CRT0_INIT_BSS TRUE
#endif
/**
* @brief Constructors invocation switch.
*/
#if !defined(CRT0_CALL_CONSTRUCTORS) || defined(__DOXYGEN__)
-#define CRT0_CALL_CONSTRUCTORS TRUE
+#define CRT0_CALL_CONSTRUCTORS TRUE
#endif
/**
* @brief Destructors invocation switch.
*/
#if !defined(CRT0_CALL_DESTRUCTORS) || defined(__DOXYGEN__)
-#define CRT0_CALL_DESTRUCTORS TRUE
+#define CRT0_CALL_DESTRUCTORS TRUE
#endif
#define SYMVAL(sym) (uint32_t)(((uint8_t *)&(sym)) - ((uint8_t *)0))
/**
- * @brief Main thread stack initial position.
+ * @brief Main stack lower boundary.
+ * @details This symbol must be exported by the linker script and represents
+ * the main stack lower boundary.
+ */
+extern uint32_t __main_stack_base__;
+
+/**
+ * @brief Main stack initial position.
+ * @details This symbol must be exported by the linker script and represents
+ * the main stack initial position.
+ */
+extern uint32_t __main_stack_end__;
+
+/**
+ * @brief Process stack lower boundary.
* @details This symbol must be exported by the linker script and represents
- * the main thread stack initial position.
+ * the process stack lower boundary.
*/
-extern uint8_t __process_stack_end__;
+extern uint32_t __process_stack_base__;
+
+/**
+ * @brief Process stack initial position.
+ * @details This symbol must be exported by the linker script and represents
+ * the process stack initial position.
+ */
+extern uint32_t __process_stack_end__;
/**
* @brief ROM image of the data segment start.
@@ -177,6 +212,19 @@ void _default_exit(void) { }
/**
+ * @brief Memory fill.
+ *
+ * @param[in] start fill area start
+ * @param[in] end fill area end
+ * @param[in] filler filler pattern
+ */
+static void fill32(uint32_t *start, uint32_t *end, uint32_t filler) {
+
+ while (start < end)
+ *start++ = filler;
+}
+
+/**
* @brief Reset vector.
*/
#if !defined(__DOXYGEN__)
@@ -199,6 +247,16 @@ void ResetHandler(void) { /* Early initialization hook invocation.*/
__early_init();
+#if CRT0_INIT_STACKS
+ /* Main and Process stacks initialization.*/
+ fill32(&__main_stack_base__,
+ &__main_stack_end__,
+ CRT0_STACKS_FILL_PATTERN);
+ fill32(&__process_stack_base__,
+ &__process_stack_end__,
+ CRT0_STACKS_FILL_PATTERN);
+#endif
+
#if CRT0_INIT_DATA
/* DATA segment initialization.*/
{
@@ -213,13 +271,7 @@ void ResetHandler(void) { #if CRT0_INIT_BSS
/* BSS segment initialization.*/
- {
- uint32_t *bp;
-
- bp = &_bss_start;
- while (bp < &_bss_end)
- *bp++ = 0;
- }
+ fill32(&_bss_start, &_bss_end, 0);
#endif
/* Late initialization hook invocation.*/
|