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 38b4513..12a3f39 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 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 /* BOOTLOADER_ADDRESS */
34 /* Interrupts are globally masked initially.*/
37 @@ -230,6 +248,21 @@ endfiniloop:
38 ldr r1, =__default_exit
41 +#ifdef BOOTLOADER_ADDRESS
43 + * Jump-to-bootloader function.
49 + ldr r0, =BOOTLOADER_ADDRESS
54 +#endif /* 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 fcfa4de..2d560da 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 /*===========================================================================*/
81 +#ifdef BOOTLOADER_ADDRESS
82 + /* jump to bootloader code */
83 + ldr r0, =__ram0_end__-4
84 + ldr r1, =MAGIC_BOOTLOADER_NUMBER
86 + str r0, [r0, #0] /* erase stored magic */
89 +#endif /* BOOTLOADER_ADDRESS */
91 /* Interrupts are globally masked initially.*/
94 @@ -289,6 +306,21 @@ endfiniloop:
95 /* Branching to the defined exit handler.*/
98 +#ifdef BOOTLOADER_ADDRESS
100 + * Jump-to-bootloader function.
106 + ldr r0, =BOOTLOADER_ADDRESS
111 +#endif /* BOOTLOADER_ADDRESS */
113 #endif /* !defined(__DOXYGEN__) */