> For the complete documentation index, see [llms.txt](https://vxerlee.gitbook.io/radare2/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://vxerlee.gitbook.io/radare2/intro-4/search_in_assembly.md).

# 在程序集中搜索

If you want to search for a certain assembler opcodes, you can use `/a` commands.

The command `/ad/ jmp [esp]` searches for the specified category of assembly mnemonic:

```
[0x00404888]> /ad/ jmp qword [rdx]
f hit_0 @ 0x0040e50d   # 2: jmp qword [rdx]
f hit_1 @ 0x00418dbb   # 2: jmp qword [rdx]
f hit_2 @ 0x00418fcb   # 3: jmp qword [rdx]
f hit_3 @ 0x004196ab   # 6: jmp qword [rdx]
f hit_4 @ 0x00419bf3   # 3: jmp qword [rdx]
f hit_5 @ 0x00419c1b   # 3: jmp qword [rdx]
f hit_6 @ 0x00419c43   # 3: jmp qword [rdx]
```

The command `/a jmp eax` assembles a string to machine code, and then searches for the resulting bytes:

```
[0x00404888]> /a jmp eax
hits: 1
0x004048e7 hit3_0 ffe00f1f8000000000b8
```