1 diff --git a/os/common/ports/ARMCMx/compilers/GCC/crt0_v6m.s b/os/common/ports/ARMCMx/compilers/GCC/crt0_v6m.s
2 index 51a79bb..42d07bd 100644
3 --- a/os/common/ports/ARMCMx/compilers/GCC/crt0_v6m.s
4 +++ b/os/common/ports/ARMCMx/compilers/GCC/crt0_v6m.s
6 #define CRT0_CALL_DESTRUCTORS TRUE
10 + * @brief Magic number for jumping to bootloader.
12 +#if !defined(MAGIC_BOOTLOADER_NUMBER) || defined(__DOXYGEN__)
13 +#define MAGIC_BOOTLOADER_NUMBER 0xDEADBEEF
16 /*===========================================================================*/
18 /*===========================================================================*/
24 +#ifdef STM32_BOOTLOADER_ADDRESS
25 + /* jump to bootloader code */
26 + ldr r0, =__ram0_end__-4
27 + ldr r1, =MAGIC_BOOTLOADER_NUMBER
29 + str r0, [r0, #0] /* erase stored magic */
32 +#endif /* STM32_BOOTLOADER_ADDRESS */
34 /* Interrupts are globally masked initially.*/
37 @@ -242,6 +260,21 @@ endfiniloop:
38 ldr r1, =__default_exit
41 +#ifdef STM32_BOOTLOADER_ADDRESS
43 + * Jump-to-bootloader function.
49 + ldr r0, =STM32_BOOTLOADER_ADDRESS
54 +#endif /* STM32_BOOTLOADER_ADDRESS */
59 diff --git a/os/common/ports/ARMCMx/compilers/GCC/crt0_v7m.s b/os/common/ports/ARMCMx/compilers/GCC/crt0_v7m.s
60 index 4812a29..dca9f88 100644
61 --- a/os/common/ports/ARMCMx/compilers/GCC/crt0_v7m.s
62 +++ b/os/common/ports/ARMCMx/compilers/GCC/crt0_v7m.s
64 #define CRT0_CPACR_INIT 0x00F00000
68 + * @brief Magic number for jumping to bootloader.
70 +#if !defined(MAGIC_BOOTLOADER_NUMBER) || defined(__DOXYGEN__)
71 +#define MAGIC_BOOTLOADER_NUMBER 0xDEADBEEF
74 /*===========================================================================*/
76 /*===========================================================================*/
82 +#ifdef STM32_BOOTLOADER_ADDRESS
83 + /* jump to bootloader code */
84 + ldr r0, =__ram0_end__-4
85 + ldr r1, =MAGIC_BOOTLOADER_NUMBER
87 + str r0, [r0, #0] /* erase stored magic */
90 +#endif /* STM32_BOOTLOADER_ADDRESS */
92 /* Interrupts are globally masked initially.*/
95 @@ -305,6 +323,21 @@ endfiniloop:
96 /* Branching to the defined exit handler.*/
99 +#ifdef STM32_BOOTLOADER_ADDRESS
101 + * Jump-to-bootloader function.
107 + ldr r0, =STM32_BOOTLOADER_ADDRESS
112 +#endif /* STM32_BOOTLOADER_ADDRESS */
114 #endif /* !defined(__DOXYGEN__) */