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Diffstat (limited to 'results/classifier/mode-deepseek-r1:32b/reasoning/system/1454')
| -rw-r--r-- | results/classifier/mode-deepseek-r1:32b/reasoning/system/1454 | 17 |
1 files changed, 17 insertions, 0 deletions
diff --git a/results/classifier/mode-deepseek-r1:32b/reasoning/system/1454 b/results/classifier/mode-deepseek-r1:32b/reasoning/system/1454 new file mode 100644 index 000000000..00b7886be --- /dev/null +++ b/results/classifier/mode-deepseek-r1:32b/reasoning/system/1454 @@ -0,0 +1,17 @@ +<think> +Okay, so I'm trying to figure out whether this QEMU bug is user-mode or system-mode related. Let's break it down. + +The problem occurs when running a reproducer program on QEMU-system-s390x compiled with LTO. The error message points to an assertion failure in do_program_interrupt within the exception handling code, specifically about an invalid instruction length (ilen). + +Looking at the steps, they compile QEMU with LTO and run a custom assembler program. The crash happens when executing this program under QEMU. The user provided some debug info, mentioning that the host PC isn't valid because GCC splits the helper function into two parts due to LTO optimization. + +So, what's happening here? It seems like an issue in how exceptions are handled during the execution of guest code. Since it's about handling a division exception (FIXPT_DIVIDE), this is part of the CPU instruction processing, which would be system-level since QEMU emulates the hardware. + +In user-mode emulation, QEMU typically runs untrusted code and handles system calls by translating them to the host OS. But in system-mode, it emulates the entire system, including handling exceptions as part of the virtualized CPU. Here, the issue is about an assertion failing during exception dispatching when running guest instructions, which sounds like a problem with how QEMU's TCG backend handles certain operations on s390x architecture. + +The fact that LTO causes the host PC to be invalid suggests it's related to code generation and function inlining. This affects how the program counter is determined during exceptions, leading to incorrect state restoration and thus the assertion failure. + +So, this seems like a system-mode issue because it involves low-level CPU exception handling and state management, which are part of emulating the entire system rather than just running user-space code with syscall translation. +</think> + +system \ No newline at end of file |