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Diffstat (limited to 'results/classifier/deepseek-2/reasoning/hypervisor/2074')
| -rw-r--r-- | results/classifier/deepseek-2/reasoning/hypervisor/2074 | 21 |
1 files changed, 21 insertions, 0 deletions
diff --git a/results/classifier/deepseek-2/reasoning/hypervisor/2074 b/results/classifier/deepseek-2/reasoning/hypervisor/2074 new file mode 100644 index 000000000..a711143bb --- /dev/null +++ b/results/classifier/deepseek-2/reasoning/hypervisor/2074 @@ -0,0 +1,21 @@ +<think> +Okay, let me try to figure out how to classify this bug report. The user mentioned they're using QEMU and are encountering an issue when trying to use the "mret" instruction in RISC-V64 to jump to a specific address. They set up their registers with mepc at 0x82200000 and mstatus as a00000800, then used "mret". However, they're getting an Instruction access fault. + +Looking at the error details: the bad instruction pc is 0x8103f7c0, which points to their elf file. The stored ra is 0x8103f7b8 and sp is 0x82032f08. So when they execute "mret", it's not jumping correctly to the intended address but instead causing an exception. + +I think this might be related to how QEMU handles RISC-V machine mode (M-mode) versus supervisor (S-mode). The user expects that using -bios would put them in M-mode, but after booting with coreboot and trying to switch to S-mode via mret, they're hitting a fault. + +The problem could be in the translation of the instruction or how QEMU manages the state transitions between modes. Maybe there's an issue in how the hypervisor (since KVM is mentioned) handles mode switches or how it maps addresses when executing certain instructions. + +Another angle: Perhaps the mret instruction isn't being correctly translated from RISC-V to the target architecture, leading to an incorrect address being loaded or executed. This would fall under mistranslation as per the categories provided. + +But considering the error is about an Instruction access fault, it might also be a device-related issue if the hardware emulation isn't set up properly. Alternatively, it could be a bug in how QEMU's hypervisor handles mode changes after using mret. + +Wait, but "mret" is a RISC-V specific instruction used for returning from exceptions. If the emulator (QEMU) mishandles this, it might not correctly switch to S-mode or load the correct context, leading to an exception because the PC isn't set properly. + +I'm leaning towards 'hypervisor' since QEMU acts as a hypervisor when using KVM. The issue could be in how the hypervisor manages the virtual machine's state transitions and instruction execution, particularly with RISC-V specific instructions like mret. + +Alternatively, if it's about incorrect mapping or translation of the instruction to the target mode, 'mistranslation' might apply. But given that this is a QEMU issue, which involves the hypervisor layer, I think 'hypervisor' is more appropriate. +</think> + +hypervisor \ No newline at end of file |