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Diffstat (limited to 'results/classifier/mode-deepseek-r1:32b/reasoning/user/952')
| -rw-r--r-- | results/classifier/mode-deepseek-r1:32b/reasoning/user/952 | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/results/classifier/mode-deepseek-r1:32b/reasoning/user/952 b/results/classifier/mode-deepseek-r1:32b/reasoning/user/952 new file mode 100644 index 000000000..dad8d8ffc --- /dev/null +++ b/results/classifier/mode-deepseek-r1:32b/reasoning/user/952 @@ -0,0 +1,19 @@ +<think> +Okay, so I'm trying to figure out whether this QEMU issue is a user-mode or system-mode problem. Let's break it down step by step. + +First, the user mentioned they're running an ARM binary in QEMU and getting a core dump with the error "qemu: uncaught target signal 5 (Trace/breakpoint trap)". They tried debugging with GDB and found that the program runs normally when remote-debugged. The problem seems to be related to how QEMU handles the BKPT instruction. + +Looking at the provided information, the binary is an ELF32 ARM file, which suggests it's intended to run in user mode since it's an executable for a specific architecture without kernel-level components. The disassembly shows a BKPT instruction at 0x0000a608, and when running under QEMU without GDB, it causes a core dump. + +The user also checked the bug report linked (https://bugs.launchpad.net/qemu/+bug/1873898), which mentions that the issue with BKPT not being correctly handled was fixed. However, they're still experiencing problems, indicating either the fix isn't applied in their version or there's a different underlying cause. + +In the debugging session using GDB, stepping through each instruction works fine, but when running without GDB, QEMU is triggering a SIGTRAP and crashing. The backtrace shows that process_pending_signals leads to dump_core_and_abort due to an unhandled signal. + +Since the issue occurs in user-mode emulation (as indicated by the use of "qemu-arm" which is for ARM Linux user mode), it's likely related to how QEMU translates guest instructions into host signals. Specifically, the BKPT instruction should generate a SIGTRAP on the host, but if not handled correctly, it can cause unexpected behavior. + +The error happens when running the program directly in QEMU without GDB, which suggests that without the debugger attached, the signal isn't being caught or processed properly by QEMU's user-mode code. This points towards an issue within QEMU's user-mode emulation layer rather than any system-level components like devices or peripherals. + +So, considering all this, the bug seems to be in how QEMU handles the BKPT instruction under user-mode emulation when not attached to a debugger, leading to an unhandled SIGTRAP and a core dump. +</think> + +user \ No newline at end of file |