sp = base[0];
pc = base[1];
- asm ("mov sp, %0" : : "r" (sp));
- asm ("mov lr, %0" : : "r" (pc));
- asm ("bx lr");
+ if (0x08000100 <= pc && pc <= 0x08200000 && (pc & 1) == 1) {
+ asm ("mov sp, %0" : : "r" (sp));
+ asm ("mov lr, %0" : : "r" (pc));
+ asm ("bx lr");
+ }
}
#define AO_BOOT_SIGNAL 0x5a5aa5a5
static struct ao_boot __attribute__ ((section(".boot"))) ao_boot;
-void
+int
ao_boot_check_chain(void)
{
if (ao_boot.signal == AO_BOOT_SIGNAL && ao_boot.check == AO_BOOT_CHECK) {
ao_boot.signal = 0;
ao_boot.check = 0;
+ if (ao_boot.base == 0)
+ return 0;
ao_boot_chain(ao_boot.base);
}
+ return 1;
}
void