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Diffstat (limited to 'results/classifier/deepseek-2/reasoning/other/1206')
| -rw-r--r-- | results/classifier/deepseek-2/reasoning/other/1206 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/results/classifier/deepseek-2/reasoning/other/1206 b/results/classifier/deepseek-2/reasoning/other/1206 new file mode 100644 index 000000000..be4c2b6fd --- /dev/null +++ b/results/classifier/deepseek-2/reasoning/other/1206 @@ -0,0 +1,15 @@ +<think> +Alright, let's figure out how to classify this bug report. The issue is with QEMU, specifically related to the 68k architecture. + +The problem occurs when using the `movew %sp@+,%sr` instruction, which doesn't restore the User Stack Pointer (USP) correctly when switching from Supervisor mode to User mode. From the description, it seems that after executing this instruction, the stack pointer remains as the Initial Stack Pointer (ISP) instead of taking the USP value. + +Looking at the code analysis provided, the `set_sr` helper is called, which in turn calls `m68k_switch_sp()`. This function correctly sets the new SP based on the mode. However, after this, there's an issue with how the post-increment operation affects the stack pointer. The tmp3 register (which holds A7) is written back to A7 after `set_sr`, causing the USP not to be used as intended. + +This seems related to how QEMU handles the writeback of registers and the timing of operations during translation. The delay in setting the areg might be causing the problem because the post-increment happens after the mode switch, overriding it with the old ISP value. + +Considering the categories provided, the bug is not a mistranslation or an assembly lowering issue. It's more about how QEMU handles register writes and stack pointer switching during mode transitions. Since the issue involves the interaction between different parts of the instruction processing (translation, execution, writebacks), it doesn't fit neatly into some of the other categories like device, graphic, etc. + +The problem seems to be a misordering in the timing of operations within QEMU's translation and execution pipeline, leading to incorrect state after mode switch. Therefore, the appropriate category is 'other' because it doesn't fall under specific hardware-related or performance issues but rather an internal processing flaw. +</think> + +other \ No newline at end of file |