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| author | Christian Krinitsin <mail@krinitsin.com> | 2025-07-06 16:43:19 +0000 |
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| committer | Christian Krinitsin <mail@krinitsin.com> | 2025-07-06 16:43:19 +0000 |
| commit | 238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd (patch) | |
| tree | cd8a1b75ba7b3543eb7fe6857f408e7be4d9fd0b /results/classifier/deepseek-r1:32b/reasoning/runtime/1368 | |
| parent | 96049c939b1916d80532630d63c14e04d5244f1d (diff) | |
| download | emulator-bug-study-238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd.tar.gz emulator-bug-study-238ec2b7cc1557d6f34c33cc482e4d0cd3e266dd.zip | |
add results
Diffstat (limited to 'results/classifier/deepseek-r1:32b/reasoning/runtime/1368')
| -rw-r--r-- | results/classifier/deepseek-r1:32b/reasoning/runtime/1368 | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/results/classifier/deepseek-r1:32b/reasoning/runtime/1368 b/results/classifier/deepseek-r1:32b/reasoning/runtime/1368 new file mode 100644 index 00000000..ceac1ba5 --- /dev/null +++ b/results/classifier/deepseek-r1:32b/reasoning/runtime/1368 @@ -0,0 +1,23 @@ +<think> +Okay, I'm trying to figure out how to classify this bug report related to QEMU. Let's break down what's happening step by step. + +First, looking at the problem description, the user is experiencing an unexpected value in the RAX register after executing two specific instructions: "mov -0x8(%rbp), %rax" and "movq 0xb8000, (%rax)". They expected RAX to be 0x7fedf but it's actually 0x7fefe, which is one less. + +They provided several steps in the process: + +1. The first instruction moves a value from memory (-0x8(%rbp)) into RAX. According to their GDB output, this memory address contains 0x000000000007fedf. So after executing this instruction, RAX should be 0x7fedf. + +2. They then execute "movq $0xb8000, (%rax)", which writes the value 0xb8000 into the memory location pointed to by RAX. + +However, they noticed that after this second instruction, RAX changes from 0x7fedf to 0x7fede. That's a decrease of one, which is unexpected. + +Then, they observed something odd: when checking the next instruction in GDB, the address changed from 0x2206 to 0x2207, and the instruction itself changed from "movq" to "movl". This suggests that perhaps there was a misfetch or an issue with how the instructions were being read. + +In step 5, they noticed that after executing "movl $0xb8000, (%rax)", RAX becomes 0x7fede. The change from movq to movl might indicate an instruction length mismatch—movq is a 64-bit move, while movl is 32-bit. If the processor misaligns or misfetches instructions, it could lead to incorrect behavior. + +Considering QEMU's role here, this seems like an issue with how the emulator handles certain instructions or memory accesses. The unexpected change in RAX suggests either a bug in the instruction decoding or execution within QEMU, possibly related to handling of 32-bit vs. 64-bit operations or instruction alignment. + +Since the problem occurs during runtime and involves incorrect behavior of registers after specific instructions, it's likely an issue with how the emulator is executing the code rather than a problem with system calls or faulty hardware. Therefore, this bug report falls under the "runtime" category. +</think> + +runtime \ No newline at end of file |