lkml.org 
[lkml]   [2003]   [Feb]   [19]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: doublefault debugging (was Re: Linux v2.5.62 --- spontaneous reboots)
Thanks!
Here is a triple fault case (2.5.62-pgcl) and since i'm not a Real
Man i had to use a simulator ;) Unfortunately i can't unwind the stack.

Freeing unused kernel memory: 100k freed
double fault, gdt at c0268020 [255 bytes]
double fault, tss at c027d800
eip = c01181c4, esp = f7f9bf90
eax = c0003dfc, ebx = ffffffff, ecx = 0000007b, edx = f7f9c04c
esi = 00000003, edi = c01181b0

0xc01181c4 <do_page_fault+20>: mov %eax,0xc(%esp,1)

(0) [0x001139e4] 0060:c01139e4 (t doublefault_fn+c4): jmp c0113ae4 ; ebfe

eax 0x1f 31
ecx 0xc027d800 -1071130624
edx 0xc027d800 -1071130624
ebx 0xc027d800 -1071130624
esp 0xc029f7ec 0xc029f7ec
ebp 0x0 0x0
esi 0xffffffff -1
edi 0x0 0
eip 0xc01139e4 0xc01139e4
eflags 0x4082 16514
cs 0x60 96
ss 0x68 104
ds 0x7b 123
es 0x7b 123
fs 0x0 0
gs 0x0 0

CR0=0x8005003b
PG=paging=1
CD=cache disable=0
NW=not write through=0
AM=alignment mask=1
WP=write protect=1
NE=numeric error=1
ET=extension type=1
TS=task switched=1
EM=FPU emulation=0
MP=monitor coprocessor=1
PE=protection enable=1
CR2=page fault linear address=0xf7f9bf8c
CR3=0x00101000
PCD=page-level cache disable=0
PWT=page-level writes transparent=0
CR4=0x000000b0
VME=virtual-8086 mode extensions=0
PVI=protected-mode virtual interrupts=0
TSD=time stamp disable=0
DE=debugging extensions=0
PSE=page size extensions=1
PAE=physical address extension=1
MCE=machine check enable=0
PGE=page global enable=1
PCE=performance-monitor counter enable=0
OXFXSR=OS support for FXSAVE/FXRSTOR=0
OSXMMEXCPT=OS support for unmasked SIMD FP exceptions=0

Global Descriptor Table (0xc0268020):
GDT[0x00]=??? descriptor hi=00000000, lo=00000000
GDT[0x01]=??? descriptor hi=00000000, lo=00000000
GDT[0x02]=??? descriptor hi=00000000, lo=00000000
GDT[0x03]=??? descriptor hi=00000000, lo=00000000
GDT[0x04]=??? descriptor hi=00000000, lo=00000000
GDT[0x05]=??? descriptor hi=00000000, lo=00000000
GDT[0x06]=??? descriptor hi=00000000, lo=00000000
GDT[0x07]=??? descriptor hi=00000000, lo=00000000
GDT[0x08]=??? descriptor hi=00000000, lo=00000000
GDT[0x09]=??? descriptor hi=00000000, lo=00000000
GDT[0x0a]=??? descriptor hi=00000000, lo=00000000
GDT[0x0b]=??? descriptor hi=00000000, lo=00000000
GDT[0x0c]=Code segment, linearaddr=00000000, len=fffff * 4Kbytes, Execute/Read, 32-bit addrs
GDT[0x0d]=Data segment, linearaddr=00000000, len=fffff * 4Kbytes, Read/Write, Accessed
GDT[0x0e]=Code segment, linearaddr=00000000, len=fffff * 4Kbytes, Execute/Read, 32-bit addrs
GDT[0x0f]=Data segment, linearaddr=00000000, len=fffff * 4Kbytes, Read/Write, Accessed
GDT[0x10]=32-Bit TSS (Busy) at c027d800, length 0x000eb
GDT[0x11]=LDT
GDT[0x12]=Code segment, linearaddr=00000000, len=00000 * 4Kbytes, Execute/Read, 32-bit addrs
GDT[0x13]=Code segment, linearaddr=00000000, len=00000 * 4Kbytes, Execute/Read, 16-bit addrs
GDT[0x14]=Data segment, linearaddr=00000000, len=00000 * 4Kbytes, Read/Write
GDT[0x15]=Data segment, linearaddr=00000000, len=00000 * 4Kbytes, Read/Write
GDT[0x16]=Data segment, linearaddr=00000000, len=00000 * 4Kbytes, Read/Write
GDT[0x17]=Code segment, linearaddr=00000000, len=00000 bytes, Execute/Read, 32-bit addrs
GDT[0x18]=Code segment, linearaddr=00000000, len=00000 bytes, Execute/Read, 16-bit addrs
GDT[0x19]=Data segment, linearaddr=00000000, len=00000 bytes, Read/Write
GDT[0x1a]=??? descriptor hi=00000000, lo=00000000
GDT[0x1b]=??? descriptor hi=00000000, lo=00000000
GDT[0x1c]=??? descriptor hi=00000000, lo=00000000
GDT[0x1d]=??? descriptor hi=00000000, lo=00000000
GDT[0x1e]=??? descriptor hi=00000000, lo=00000000
GDT[0x1f]=32-Bit TSS (Busy) at c027f500, length 0x000eb

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at http://vger.kernel.org/majordomo-info.html
Please read the FAQ at http://www.tux.org/lkml/

\
 
 \ /
  Last update: 2005-03-22 13:33    [W:0.069 / U:4.028 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site