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From: | Christian Borntraeger |
Subject: | Re: [Qemu-devel] [PATCH 4/4] s390x/kvm: hw debugging support via guest PER facility |
Date: | Fri, 30 May 2014 10:57:08 +0200 |
User-agent: | Mozilla/5.0 (X11; Linux i686; rv:24.0) Gecko/20100101 Thunderbird/24.5.0 |
On 30/05/14 10:32, Alexander Graf wrote: >> + case KVM_HW_BP: >> + if (find_hw_breakpoint(arch_info->addr, -1, arch_info->type)) { >> + ret = EXCP_DEBUG; >> + } >> + break; >> + case KVM_SINGLESTEP: >> + if (cs->singlestep_enabled) { >> + ret = EXCP_DEBUG; >> + } >> + break; >> + default: >> + ret = -ENOSYS; >> + } >> + >> + return ret; > > What happens to the diag 501 now? Are we safe to just drop it? There can only be a small number of HW breakpoints (basically only one from-to range on s390). So gdb can (and will) use both (hbreak vs. break)
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