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Diffstat (limited to 'results/classifier/deepseek-r1:14b/reasoning/mistranslation/1713066')
| -rw-r--r-- | results/classifier/deepseek-r1:14b/reasoning/mistranslation/1713066 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/results/classifier/deepseek-r1:14b/reasoning/mistranslation/1713066 b/results/classifier/deepseek-r1:14b/reasoning/mistranslation/1713066 new file mode 100644 index 00000000..410e5c3c --- /dev/null +++ b/results/classifier/deepseek-r1:14b/reasoning/mistranslation/1713066 @@ -0,0 +1,21 @@ +<think> +Okay, so I'm trying to classify this bug report related to QEMU. The issue is about incorrect handling of the aarch64 ldp instruction in some cases. Let me break this down step by step. + +First, the problem occurs when the ldp instruction (which loads two 64-bit values) is used. If each value being loaded is on a different page and the second page is unmapped, an exception is raised. The issue here is that after handling the exception, QEMU tries to rerun the instruction but ends up causing another invalid load. + +The user believes this is incorrect according to the ARMv8 reference manual. They mention that upon taking an exception, certain registers should be restored to their initial values, specifically x0 shouldn't change. But in QEMU's current implementation, x0 has already been updated before the exception occurs, leading to problems when resuming. + +The bug was observed while running FreeBSD with a cortex-strings memcpy implementation, which uses similar instructions for copying data between 64 and 96 bytes. + +Looking at the categories provided: mistranslation, assembly lowering, device, graphic, socket, network, KVM, boot, vnc, debug, files, permissions, performance, kernel, peripherals, hypervisor, other. + +This issue seems to relate to how QEMU handles exceptions when executing certain ARM instructions. The problem is with the state of registers after an exception, which falls under the translation or handling of machine-level instructions in the emulator. + +The ldp instruction is part of user-mode assembly code execution within QEMU. When such an instruction causes a page fault (since one of the loads crosses into an unmapped page), QEMU's exception handling isn't correctly restoring the registers as per the ARM specification, leading to incorrect behavior upon resumption. + +This seems to be related to how QEMU translates or emulates these assembly instructions and handles exceptions. Since it's about instruction execution in user mode, it might not fall under a specific category like network or device. The issue is more about the correctness of the translation and exception handling in the emulator, which points towards 'mistranslation' because it involves incorrect semantic mapping during the handling of multi-register loads. + +Alternatively, 'assembly lowering' could be relevant since it's about how QEMU processes assembly instructions, but 'mistranslation' might encompass the incorrect state changes after exceptions. Considering the categories given, 'mistranslation' seems to fit best as the issue is with how the ldp instruction and its side effects are being handled incorrectly during exception processing. +</think> + +mistranslation \ No newline at end of file |