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static unsigned long findstage(char* target)
{
unsigned long entry;
asm volatile (
"mov $1f, %%esp\n\t"
"jmp walkcbfs\n\t"
"1:\n\t" : "=a" (entry) : "S" (target) : "ebx", "ecx", "edx", "edi", "ebp", "esp");
return entry;
}
static void call(unsigned long addr)
{
asm volatile ("jmp %0\n\t" : : "r" (addr));
}
static void main(void)
{
const char* target1 = "fallback/romstage";
unsigned long entry;
entry = findstage(target1);
if (entry) call(entry);
asm volatile ("1:\n\thlt\n\tjmp 1b\n\t");
}
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