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According to MIPS EJTAG Specification [1], a Debug Breakpoint exception occurs when an SDBBP instruction is executed, the CP0_DEBUG bit DBp indicates that a Debug Breakpoint exception occurred. When I read the original code, it looks a little confusing at first glance, just check bit DBp for SDBBP to make the code more readable, it will be much easier to understand. [1] http://www.t-es-t.hu/download/mips/md00047f.pdf Signed-off-by: Tiezhu Yang <yangtiezhu@loongson.cn> Signed-off-by: Thomas Bogendoerfer <tsbogend@alpha.franken.de> |
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uapi/asm |