blob: 693644ecb599fb523d1fde7604dcfea40b512221 (
plain) (
blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
|
<think>
Okay, I'm trying to figure out whether this QEMU issue is a user-mode or system-mode problem. Let's start by understanding what the user is describing.
They're running `qemu-x86_64` on an AArch64 platform and executing an x86_64 version of `ls`. The command they use is:
```
qemu-x86_64 -L /tmp/ls-x86_64/root-x86_64-ls /tmp/ls-x86_64/root-x86_64-ls/bin/ls -l /
```
The problem is that this command returns incorrect results. The user provided steps to reproduce, which involve copying the `ls` binary and its dependencies from an x86_64 system to aarch64 and then using QEMU to run it.
First, I know that QEMU can emulate different architectures in both user-mode and system-mode. User-mode emulation runs individual executables without starting a full OS, while system-mode emulates the entire hardware, including booting an operating system.
In this case, the user is executing `ls` directly via QEMU. The `-L` option specifies the location of the dynamic linker for user-mode emulation. This suggests that they're using QEMU in user mode because they're running a single executable without booting an OS.
The issue arises when the x86_64 `ls` is run on AArch64 using QEMU-x86_64. The incorrect results imply there's an issue with how QEMU is emulating the environment for this binary. Since they're not running a full OS, it's more about the execution of the application and its dependencies.
Potential issues could be related to library compatibility, file system handling under emulation, or incorrect CPU instruction translation in user mode. These are typically handled within user-mode settings rather than system-mode because they don't involve device emulation or kernel-level processes.
Additionally, the fact that they're using `-L` points towards user-mode since this option is specific to how QEMU locates libraries for the binary being executed. System-mode would handle such things through a virtualized OS setup.
So, putting it all together, the problem seems to be within the user-mode emulation because it's directly executing an x86_64 application on an AArch64 host without a full OS context.
</think>
The issue is related to user-mode emulation because QEMU is being used to execute a single binary without booting an operating system. The `-L` option specifies the dynamic linker location, which is typical in user-mode setups.
user
|