Hi Pratyush, on 2016/3/21 18:24, Pratyush Anand wrote: > On 21/03/2016:08:37:50 AM, He Kuang wrote: >> On arm64, watchpoint handler enables single-step to bypass the next >> instruction for not recursive enter. If an irq is triggered right >> after the watchpoint, a single-step will be wrongly triggered in irq >> handler, which causes the watchpoint address not stepped over and >> system hang. > > Does patch [1] resolves this issue as well? I hope it should. Patch[1] has > still > not been sent for review. Your test result will be helpful. > > ~Pratyush > > [1] > https://github.com/pratyushanand/linux/commit/7623c8099ac22eaa00e7e0f52430f7a4bd154652
This patch did not consider that, when excetpion return, the singlestep flag should be restored, otherwise the right singlestep will not triggered. Right? Thanks, Li Bin > > _______________________________________________ > linux-arm-kernel mailing list > [email protected] > http://lists.infradead.org/mailman/listinfo/linux-arm-kernel > > . >
