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<think>
Alright, let's try to figure out what category this bug falls into. The user mentioned that when running their program using QEMU in user mode on Linux/sparc64, they encounter an error where `getdomainname()` is not implemented.
First, I need to understand the context. They're compiling a C program that uses `getdomainname()`, and when executing it under QEMU, instead of getting "(none)", they get an error saying the function isn't implemented.
Looking at the problem description, the issue arises during the execution of the compiled binary within QEMU. The error message is about a missing implementation of a specific system call. So, `getdomainname()` is a system call that's supposed to retrieve the domain name of the host machine.
In this case, since the function isn't implemented in QEMU's user mode on Linux/sparc64, it seems like a syscall is failing because QEMU doesn't handle it correctly. The error occurs at runtime when the program tries to execute `getdomainname()`, leading to the problem being related to system calls.
So, categorizing this, it's not about an instruction or a compile-time issue but rather an error during execution related to how the system call is handled by QEMU. Therefore, this bug falls under the 'syscall' category because it's directly tied to the implementation of a specific system call within the emulator.
</think>
The bug report describes an issue where the `getdomainname()` system call is not implemented in QEMU's user mode for Linux/sparc64. This relates to how system calls are handled by the emulator, leading to runtime errors when executing code that uses this function.
syscall
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