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Diffstat (limited to 'results/classifier/deepseek-2/reasoning/mistranslation/2040')
| -rw-r--r-- | results/classifier/deepseek-2/reasoning/mistranslation/2040 | 15 |
1 files changed, 15 insertions, 0 deletions
diff --git a/results/classifier/deepseek-2/reasoning/mistranslation/2040 b/results/classifier/deepseek-2/reasoning/mistranslation/2040 new file mode 100644 index 00000000..c91f7eb3 --- /dev/null +++ b/results/classifier/deepseek-2/reasoning/mistranslation/2040 @@ -0,0 +1,15 @@ +<think> +Alright, I'm trying to figure out how to classify this bug report. The problem involves x86 TCG incorrectly truncating physical addresses to 32 bits when PAE (Physical Address Extension) is enabled. + +First, let's understand what's happening here. PAE allows the CPU to handle physical addresses beyond 4GB, which is crucial for systems with more RAM. The bug report mentions that 32-bit Windows fails to boot on systems with RAM above 4GB when using TCG but works fine under KVM. This suggests it's a problem specific to the user-mode translation in QEMU. + +The issue stems from how physical addresses are handled. In the code, there's a check for whether long mode (HF_LMA_MASK) is enabled before allowing larger addresses. However, PAE should enable handling of these addresses even without being in long mode. So truncating the address to 32 bits when PAE is active is incorrect because it prevents proper access beyond 4GB. + +The category options include "mistranslation," which refers to incorrect semantic mapping from the source architecture to the target, especially in user-mode. Since this issue occurs during address translation and affects how physical addresses are handled, mistranslation seems fitting. The problem isn't about assembly lowering or other categories like device or network; it's specifically about the translation layer mishandling addresses when PAE is enabled. + +Therefore, classifying this bug under "mistranslation" makes sense because it involves incorrect handling during the address mapping process in user-mode execution with TCG. +</think> + +The issue arises from incorrect handling of physical addresses beyond 4GB when PAE is enabled. The code mistakenly truncates these addresses to 32 bits, which breaks systems with more RAM under TCG but works fine in KVM. Since this is a translation problem specific to user-mode, the correct category is: + +mistranslation \ No newline at end of file |