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[Qemu-devel] AArch64 register SP value always appearing as zero in "info


From: Claudio Fontana
Subject: [Qemu-devel] AArch64 register SP value always appearing as zero in "info registers" (kvm control)
Date: Thu, 20 Feb 2014 14:40:20 +0100

Hello,

I am running kvm controlled qemu using mach virt,

and I have this glitch where the SP value in "info registers" always
appears as zero to me:

(qemu) info registers
PC=00000000400b0044  SP=0000000000000000
X00=0000000040324000 X01=0000000040331000 X02=00000000400b0000
X03=0000000000000000
X04=0000000040080000 X05=0000000000000000 X06=0000000000000000
X07=0000000000000000
X08=0000000000000000 X09=0000000000000000 X10=0000000000000000
X11=0000000000000000
X12=0000000000000000 X13=0000000000000000 X14=0000000000000000
X15=0000000000000000
X16=0000000000000000 X17=0000000000000000 X18=0000000000000000
X19=0000000000000000
X20=0000000000000000 X21=0000000000000000 X22=0000000000000000
X23=0000000000000000
X24=0000000000000000 X25=0000000000000000 X26=0000000000000000
X27=0000000000000000
X28=0000000000000000 X29=0000000040324000 X30=00000000400b0014
PSTATE=600003c5 (flags -ZC-)

In the guest I am doing

adrp x0, something
mov sp, x0
mov x29, sp

and while I can see the x29 value (seen above), my SP still appears as zero..

I am at commit 91abb80b5f66e8387ae1a5ba85083e49b877938c (7th February)

Any idea about what could be wrong?

Thank you,

Claudio



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