synth/arm/app_init.cc

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#include <cstdint>
extern "C" int main();
extern uint32_t _bss_begin, _bss_end, _initial_stack_pointer;
__attribute__((section(".app_init")))
void AppInit() {
*(uint32_t*)(0x40000000) = 0;
asm ("mov sp, %0"
:
: "r" (&_initial_stack_pointer)
:
);
// clear .bss
for (uint32_t* ptr = &_bss_begin; ptr < &_bss_end; ptr++) {
*ptr = 0;
}
main();
while(true) {}
}