[Qemu-devel] x86_64 movl bug

[jakllsch]

Hi,

http://mail-index.netbsd.org/port-amd64/2008/02/13/msg000124.html

http://mail-index.netbsd.org/netbsd-bugs/2008/02/13/msg001312.html

This looked like this in QEMU 0.9.1:

....

0xffffffff80115260:  cmp    %gs:0x2d4,%edi
0xffffffff80115268:  jae    0xffffffff80115288

----------------
IN: 
0xffffffff8011526a:  addr32 mov %gs:0x308(,%edi,4),%edx
0xffffffff80115273:  pushfq 
0xffffffff80115274:  cli    
0xffffffff80115275:  test   %edx,%gs:0x2d0
0xffffffff8011527d:  jne    0xffffffff8011528a

----------------
IN: 
0xffffffff8011526a:  addr32 mov %gs:0x308(,%edi,4),%edx
0xffffffff80115273:  pushfq 
0xffffffff80115274:  cli    
0xffffffff80115275:  test   %edx,%gs:0x2d0
0xffffffff8011527d:  jne    0xffffffff8011528a

qemu: fatal: triple fault
RAX=0000000000000000 RBX=0000000000000003 RCX=ffffffff80b1c9c0 
RDX=ffffffff80b209c0
RSI=0000000000000000 RDI=0000000000000000 RBP=ffffffff80d28cf0 
RSP=ffffffff80d28ca8
R8 =ffffffff80d28dc8 R9 =00000000000002e0 R10=0000000000000000 
R11=ffffffff80ba9a80
R12=ffffffff80ba97a0 R13=ffffffff80ba97a8 R14=0000000000000000 
R15=0000000000000000
RIP=ffffffff8011526a RFL=00000002 [-------] CPL=0 II=0 A20=1 SMM=0 HLT=0
ES =0010 0000000000000000 ffffffff 00cf9300
CS =0008 0000000000000000 ffffffff 00af9a00
SS =0010 0000000000000000 ffffffff 00cf9300
DS =0010 0000000000000000 ffffffff 00cf9300
FS =0000 0000000000000000 00000000 00000000
GS =0000 ffffffff80b209c0 00000000 00000000
LDT=0000 0000000000000000 0000ffff 00008000
TR =0000 0000000000000000 0000ffff 00008000
GDT=     0000000000aff080 00000018
IDT=     0000000000000000 000003ff
CR0=e001003b CR2=0000000000000080 CR3=0000000000d25000 CR4=00000620
CCS=0000000000000005 CCD=fffffffffffffffb CCO=SUBL    
FCW=037f FSW=0000 [ST=0] FTW=00 MXCSR=00001f80
FPR0=0000000000000000 0000 FPR1=0000000000000000 0000
FPR2=0000000000000000 0000 FPR3=0000000000000000 0000
FPR4=0000000000000000 0000 FPR5=0000000000000000 0000
FPR6=0000000000000000 0000 FPR7=0000000000000000 0000
XMM00=00000000000000000000000000000000 XMM01=00000000000000000000000000000000
XMM02=00000000000000000000000000000000 XMM03=00000000000000000000000000000000
XMM04=00000000000000000000000000000000 XMM05=00000000000000000000000000000000
XMM06=00000000000000000000000000000000 XMM07=00000000000000000000000000000000
XMM08=00000000000000000000000000000000 XMM09=00000000000000000000000000000000
XMM10=00000000000000000000000000000000 XMM11=00000000000000000000000000000000
XMM12=00000000000000000000000000000000 XMM13=00000000000000000000000000000000
XMM14=00000000000000000000000000000000 XMM15=00000000000000000000000000000000

        Jonathan Kollasch