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M487: Re-implement Reset_Handler() in naked inline assembly 

This is to guarantee SRAM bank2, not initialized yet, isn't used for stack by function preamble code at the very start.
pull/12557/head
Chun-Chieh Li 2020-02-27 17:38:53 +08:00
parent 5c16018c96
commit 55f88a0942
1 changed files with 5 additions and 11 deletions
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16
targets/TARGET_NUVOTON/TARGET_M480/device/startup_M480.c
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@ -360,18 +360,12 @@ __asm void Reset_Handler_Cascade(void *sp, void *pc)
#elif defined (__GNUC__) || defined (__ICCARM__)
void Reset_Handler(void)
__attribute__((naked)) void Reset_Handler(void)
{
/* NOTE: In debugger disassembly view, check initial stack cannot be accessed until initial stack pointer has changed to 0x20000200 */
__asm volatile (
"mov sp, %0 \n"
"mov r0, sp \n"
"mov r1, %1 \n"
"b Reset_Handler_Cascade \n"
: /* output operands */
: "l"(0x20000200), "l"(&Reset_Handler_1) /* input operands */
: "r0", "r1", "cc" /* list of clobbered registers */
);
__asm("ldr sp, =0x20000200 \n");
__asm("mov r0, sp \n");
__asm("ldr r1, =Reset_Handler_1 \n");
__asm("b Reset_Handler_Cascade \n");
}
void Reset_Handler_Cascade(void *sp, void *pc)