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Diffstat (limited to 'results/classifier/mode-deepseek-r1:32b/reasoning/user/1830872')
| -rw-r--r-- | results/classifier/mode-deepseek-r1:32b/reasoning/user/1830872 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/results/classifier/mode-deepseek-r1:32b/reasoning/user/1830872 b/results/classifier/mode-deepseek-r1:32b/reasoning/user/1830872 new file mode 100644 index 000000000..756206a23 --- /dev/null +++ b/results/classifier/mode-deepseek-r1:32b/reasoning/user/1830872 @@ -0,0 +1,23 @@ +<think> +Okay, so I need to figure out whether this bug is user-mode or system-mode related in QEMU. Let me read through the problem description carefully. + +The issue arises when translating aarch64 assembly code from EDK2's CopyMem() function into ARMv7 using TCG (Translation Companion Generator). The destination buffer gets corrupted, specifically at offset 0xFC0 every 4KB block, where an 8-byte word becomes zero instead of the correct data. This causes an assertion failure in the guest, which is part of EDK2's BaseLib. + +Looking at the provided information: + +- **Code Context**: The problem occurs in a library function (CopyMem()), which suggests it's part of user-mode code since libraries like these are typically used by applications or higher-level system software, not kernel or hardware drivers. + +- **Translation Issue**: TCG is responsible for translating machine code from one architecture to another. In this case, aarch64 to ARMv7. The mistranslation leads to data corruption in the destination buffer, which affects the guest's operation but doesn't involve hardware devices directly. + +- **Reproducer Command Line**: The QEMU command uses a Virt machine with TCG and specifies various drives and CPUs. It also sets up character devices for communication. This setup is typical for running UEFI firmware (EDK2), which runs in a virtualized environment, so it's more about user-mode software rather than system hardware. + +- **Symptoms**: The assertion failure happens in the guest due to corrupted data. Since this is part of EDK2 libraries, which are used during boot or initialization but not as low-level kernel code, it points towards user-mode issues. + +- **Debugging Details**: Disassembly shows functions like InternalMemCopyMem() and __memcpy(), both of which are standard library functions. The issue isn't with device drivers or system calls but with memory manipulation routines. + +Considering all these factors, the bug seems to be in how TCG translates certain aarch64 instructions into ARMv7 code, affecting user-mode operations within the guest. Since it's not related to hardware devices, peripherals, or kernel-level functions (like system calls), it doesn't fall under system-mode issues. +</think> + +The bug is related to incorrect translation of user-mode code during emulation. + +user \ No newline at end of file |