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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 16:27:09 +0000 |
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| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-07-03 16:27:09 +0000 |
| commit | 4d9e26c0333abd39bdbd039dcdb30ed429c475ba (patch) | |
| tree | 4010d5fb3e8bc48c110a2c1ff2a16b8648cb86bb /results/classifier/accel-gemma3:12b/kvm/2279 | |
| parent | 5541099586dbd6018574cb44e1934907c121526f (diff) | |
| download | qemu-analysis-4d9e26c0333abd39bdbd039dcdb30ed429c475ba.tar.gz qemu-analysis-4d9e26c0333abd39bdbd039dcdb30ed429c475ba.zip | |
add gemma accelerator classification results
Diffstat (limited to 'results/classifier/accel-gemma3:12b/kvm/2279')
| -rw-r--r-- | results/classifier/accel-gemma3:12b/kvm/2279 | 26 |
1 files changed, 26 insertions, 0 deletions
diff --git a/results/classifier/accel-gemma3:12b/kvm/2279 b/results/classifier/accel-gemma3:12b/kvm/2279 new file mode 100644 index 000000000..0773153aa --- /dev/null +++ b/results/classifier/accel-gemma3:12b/kvm/2279 @@ -0,0 +1,26 @@ + +Debugging with Lauterbach Trace32 -> Cortex-A76, no SP register update +Description of problem: +We do not see changes in the SP_EL1 register value when debugging the QEMU application with Lauterbach Trace32. +Steps to reproduce: +1. Compile bare metal code that uses push and pop instructions (stack). +2. Run QEMU with bare metal code. +3. Connect via Lauterbach Trace32 and check the displayed SP register value. +Additional information: + +This is a screenshot from QEMU 8.0.0, but updating to QEMU 8.2.0 does not resolve the problem. + +I have discussed this with Lauterbach Trace32 support with these results: +- Trace32 uses RSP protocol `p` packets to read some registers, including SP_EL1. GDB seems to use `g` packet. +- QEMU responds to `p` packet with an invalid value, which causes Trace32 to display invalid value. + +Some related RSP protocol logs from Trace32. + + + +Different part of RSP protocol log: +``` +Sending packet: $p20#d2 ... +receiving packet: ec00004000000000 +``` +So it looks like Trace32 can receive different values that zero as response to `p` packet. |