28 lines
653 B
C
28 lines
653 B
C
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extern void _end;
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void malloc_addblock(void* addr, int size);
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int entry();
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__attribute__((weak, naked, noinline, noreturn)) void _start() {
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// set bss segment symbols
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asm(".global __bss_start__, __bss_end__");
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asm("__bss_start__ = _edata");
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asm("__bss_end__ = _end");
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// set stack pointer
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asm("mov sp, #0x100000");
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// allocate heap block
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malloc_addblock(&_end, (void*)0xf0000 - &_end);
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// run main()
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entry();
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// wait for next video frame
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while (*(volatile int*)0x4000020 != 0) { }
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// halt cpu
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asm(".long 0xe7f000f0"); // udf #0
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}
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void _Exit(int ec) {
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asm(".long 0xe7f000f0"); // udf #0
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}
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