From: Ian Jiang <ianjiang.ict@gmail.com>
To: qemu-devel@nongnu.org
Subject: riscv: How to debug a wrong pc after executing ret instruction?
Date: Wed, 8 Jan 2020 17:22:48 +0800 [thread overview]
Message-ID: <CAMAD20mmgEa_W869C961T_1DQnx+J=dKYFJgv=2WEw5iDL5T1A@mail.gmail.com> (raw)
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Problem
======
The next instruction after executing "ret" (i.e. jalr x0, 0(x1)) is not at
0x000000008000056c (x1/ra) as expected, but at 0x000000008000056c.
How to debug this issue? Any suggestion is appreciated.
QEMU command
=============
qemu-system-riscv64 -nographic -machine virt -kernel my-test.elf -smp 1 -d
in_asm,cpu
Trace (piece)
===========
IN:
0x0000000081150000: 00259eb7 lui t4,2461696
0x0000000081150004: 00099b37 lui s6,626688
0x0000000081150008: 01db3023 sd t4,0(s6)
0x000000008115000c: 00008067 ret
pc 0000000081150000
x1/ra 000000008000056c
IN:
0x0000000080003da0: 10503023 sd t0,256(zero)
...
QEMU version
===========
upstream tag v4.2.0
--
Ian Jiang
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next reply other threads:[~2020-01-08 9:23 UTC|newest]
Thread overview: 3+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-08 9:22 Ian Jiang [this message]
2020-01-08 15:08 ` riscv: How to debug a wrong pc after executing ret instruction? Bin Meng
2020-01-08 15:34 ` Peter Maydell
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