----- Original Message ----- > Hi Dave, > > crash has a funny bug that bt command wrongly shows RCX value > as RDX value for exception stack of x86_64 xen hypervisor. > > Here is an example. > RDX is 0xcfc but bt shows 0x4 (== RCX) for it. > > ffff828c802f0fa0: 0000000000000246 00000000ffffffff F............... > R8 RAX > ffff828c802f0fb0: 0000000000000004 0000000000000cfc ................ > RCX ^^^^ RDX ^^^^ > ffff828c802f0fc0: 0000000000000000 00000000800f0000 ................ > RSI RDI > crash> bt > PCPU: 0 VCPU: ffff8300695be080 > #0 [ffff828c802f0f40] kexec_crash at ffff828c8010d227 > #1 [ffff828c802f0f50] handle_ist_exception at ffff828c801926f7 > [exception RIP: pci_conf_read+130] > RIP: ffff828c801537e2 RSP: ffff828c802f7de0 RFLAGS: 00000006 > RAX: 00000000ffffffff RBX: 0000000000000004 RCX: 0000000000000004 > RDX: 0000000000000004 RSI: 0000000000000000 RDI: 00000000800f0000 > ^^^^ > RBP: 0000000000000cfc R8: 0000000000000246 R9: 0000000000000000 > R10: 0000000000000000 R11: 000000000000ffff R12: 0000000000000004 > R13: 0000000000000000 R14: 0000000000000000 R15: ffff8300695be080 > ORIG_RAX: 0000000200000000 CS: e008 SS: 0000 > --- <exception stack> --- > #2 [ffff828c802f7de0] guest_io_read at ffff828c80148345 > #3 [ffff828c802f7e20] do_general_protection at ffff828c8014a00c > #4 [ffff828c802f7eb0] reprogram_timer at ffff828c8012c55e > #5 [ffff828c802f7f20] handle_exception_saved at ffff828c80192495 > crash> > > > Signed-off-by: Seiichi Ikarashi <s.ikarashi@xxxxxxxxxxxxxx> > > --- a/x86_64.c 2012-02-04 04:22:33.000000000 +0900 > +++ b/x86_64.c 2012-02-21 17:04:09.032121837 +0900 > @@ -6562,7 +6562,7 @@ x86_64_print_eframe_regs_hyper(struct bt > fprintf(fp, " RAX: %016lx RBX: %016lx RCX: %016lx\n", > up[10], up[5], up[11]); > fprintf(fp, " RDX: %016lx RSI: %016lx RDI: %016lx\n", > - up[11], up[13], up[14]); > + up[12], up[13], up[14]); > fprintf(fp, " RBP: %016lx R8: %016lx R9: %016lx\n", > up[4], up[9], up[8]); > fprintf(fp, " R10: %016lx R11: %016lx R12: %016lx\n", Thanks Seiichi -- it looks it's been doing that since Xen hypervisor support was originally added. Queued for crash-6.0.4. Dave -- Crash-utility mailing list Crash-utility@xxxxxxxxxx https://www.redhat.com/mailman/listinfo/crash-utility
