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[Qemu-devel] [Bug 550863] Re: MicroBlaze QEMU skips jumps when using sin
From: |
Christophe |
Subject: |
[Qemu-devel] [Bug 550863] Re: MicroBlaze QEMU skips jumps when using single steps in GDB |
Date: |
Tue, 01 Feb 2011 13:22:13 -0000 |
I'm having a similar issue with Qemu 0.13.0, program counter is just
incremented by 4 when single stepping. I am using GDB 7.2. Stephan, did
you get it to work in single step mode?
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https://bugs.launchpad.net/bugs/550863
Title:
MicroBlaze QEMU skips jumps when using single steps in GDB
Status in QEMU:
New
Bug description:
I'm trying to debug a MicroBlaze application (with the MicroBlaze
system qemu, not the user mode qemu) using GDB. When I'm trying to
single step through instructions all the branches are ignored: the
program counter is just incremented by 4 (default), even for
unconditional branches. This only occurs when using single step mode,
everything runs as expected when using breakpoints only.
Qemu Versions tested: 0.11.0, 0.12.3, GIT version (March 29, 2010)
Qemu command used: qemu-system-microblaze -kernel test.elf -S -s
GDB Versions used: 7.1 (official MicroBlaze support), 6.5 (from Xilinx EDK
10.1), 5.3 (from Xilinx EDK 9.1)
GCC Versions used: 4.1.1 (from Xilinx EDK 11.1)
I've attached my program, it uses a custom linker script and startup
code. It runs fine without using singlestep mode.
The bug looks similar to one submitted for PPC a while ago (181951).
- [Qemu-devel] [Bug 550863] Re: MicroBlaze QEMU skips jumps when using single steps in GDB,
Christophe <=