Messages in this thread | | | Date | Wed, 26 Nov 2014 15:44:57 +0100 | From | Borislav Petkov <> | Subject | Re: [PATCH 3.17 100/141] x86, microcode: Fix accessing dis_ucode_ldr on 32-bit |
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On Wed, Nov 26, 2014 at 07:39:26AM -0500, boris ostrovsky wrote: > https://lkml.org/lkml/2014/11/25/973 is all I have right now.
Ok, so the Code: section from this splat says:
25: 55 push %ebp 26: 89 e5 mov %esp,%ebp 28: 83 ec 08 sub $0x8,%esp 2b:* 80 3d c0 ee 97 01 00 cmpb $0x0,0x197eec0 <-- trapping instruction 32: 89 1c 24 mov %ebx,(%esp) 35: 89 74 24 04 mov %esi,0x4(%esp) 39: 74 12 je 0x4d 3b: 8b 1c 24 mov (%esp),%ebx 3e: 8b .byte 0x8b 3f: 74 .byte 0x74
which I can correlate to the dis_ucode_ldr test here:
.loc 1 134 0 .loc 1 137 0 cmpb $0, dis_ucode_ldr+1073741824 #, *_11 je .L46 #,
so we must be faulting when accessing that dis_ucode_ldr thing. But you said that accessing it through its virtual address doesn't fix the issue either. Which is very very strange...
Hmmm.
-- Regards/Gruss, Boris.
Sent from a fat crate under my desk. Formatting is fine. --
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