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Fix possible hardfault when optimizing code

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This commit is contained in:
Mario Hüttel 2020-08-30 19:40:08 +02:00
parent ebbf27735c
commit c504494a3d
1 changed files with 14 additions and 0 deletions
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14
startup/startup_stm32f407vx.c
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@ -280,9 +280,23 @@ extern unsigned int __ld_ebss;
extern unsigned int __ld_sheap; extern unsigned int __ld_sheap;
extern unsigned int __ld_eheap; extern unsigned int __ld_eheap;
#ifdef CPACR
#undef CPACR
#endif
#define CPACR (*((volatile uint32_t *)0xE000ED88))
void Reset_Handler(void) { void Reset_Handler(void) {
/* Stack is already initialized by hardware */ /* Stack is already initialized by hardware */
/* The first thing we do here, is to initialize the FPU
* When this code is compiled optimized with hardfpu abi,
* GCC tends to generate FPU instructions for data copying
*/
#if __FPU_USED == 1
CPACR |= (0xF << 20);
#endif
/* Copy .data section */ /* Copy .data section */
__init_section(&__ld_load_data, &__ld_sdata, &__ld_edata); __init_section(&__ld_load_data, &__ld_sdata, &__ld_edata);
/* Fill bss with zero */ /* Fill bss with zero */