<table border="1" cellspacing="0" cellpadding="8">
    <tr>
        <th>Issue</th>
        <td>
            <a href=https://github.com/llvm/llvm-project/issues/62835>62835</a>
        </td>
    </tr>

    <tr>
        <th>Summary</th>
        <td>
            lldb points to the wrong address of codes
        </td>
    </tr>

    <tr>
      <th>Labels</th>
      <td>
            new issue
      </td>
    </tr>

    <tr>
      <th>Assignees</th>
      <td>
      </td>
    </tr>

    <tr>
      <th>Reporter</th>
      <td>
          NeumoNeumo
      </td>
    </tr>
</table>

<pre>
    # Description
When using `lldb` to debug an operating system running on `qemu-system-i386`, I find that the current running code lldb pointed to is incorrect. The correct address should be determined by \$cs:\$ip (\$cs * 0x10 + \$ip) in real mode. But `lldb` only considered the value of \$ip.

For example, if `eip = 0x0000e05b` and `cs = 0x0000f000`, the it should point to `0x000fe05b` However, lldb only considered cs and pointed to `0xe05b`.

# Reproduction
```bash
# In one terminal, we start a qemu debug server hosted on localhost:1234 by default.
git clone --depth 1 https://github.com/NeumoNeumo/Linux-0.11
cd Linux-0.11
make
make debug

# Then, in another one, we connect to the debug server with `lldb`
lldb
(lldb) gdb-remote 1234
Process 1 stopped
* thread #1, stop reason = signal SIGTRAP
    frame #0: 0x0000fff0
->  0xfff0: addb %al, (%eax)
    0xfff2: addb   %al, (%eax)
    0xfff4: addb   %al, (%eax)
    0xfff6: addb   %al, (%eax)
(lldb) n
Process 1 stopped
* thread #1, stop reason = instruction step over
    frame #0: 0x0000e05b
->  0xe05b: addb   %al, (%eax)
    0xe05d: addb   %al, (%eax)
    0xe05f: addb   %al, (%eax)
    0xe061: addb   %al, (%eax)
(lldb) reg read
general:
       eax = 0x00000000
 ecx = 0x00000000
       edx = 0x00000663
       ebx = 0x00000000
 esp = 0x00000000
       ebp = 0x00000000
       esi = 0x00000000
 edi = 0x00000000
       eip = 0x0000e05b
    eflags = 0x00000002
        cs = 0x0000f000
...
...
``` 
**Note that `eip = 0x0000e05b` and `cs = 0x0000f000`. However, lldb only considered cs and pointed to `0xe05b`.**

# Environment

1. lldb version 16.0.4

2. OS
```txt
OS: Ubuntu 22.04.2 LTS x86_64
Host: Inspiron 5409
Kernel: 5.19.0-41-generic
Uptime: 20 days, 5 hours, 41 mins
Packages: 2687 (dpkg)
Shell: fish 3.3.1
Resolution: 1920x1080
DE: GNOME 42.5
WM: Mutter
WM Theme: Adwaita
Theme: Yaru-dark [GTK2/3]
Icons: Yaru [GTK2/3]
Terminal: tmux
CPU: 11th Gen Intel i5-1135G7 (8) @ 4.200GHz
GPU: Intel TigerLake-LP GT2 [Iris Xe Graphics]
Memory: 7376MiB / 15728MiB
```

3. qemu-system-i386 --version
```txt
QEMU emulator version 6.2.0 (Debian 1:6.2+dfsg-2ubuntu6.8)
Copyright (c) 2003-2021 Fabrice Bellard and the QEMU Project developers
```

</pre>
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