> For the complete documentation index, see [llms.txt](https://docs.hex-rays.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.hex-rays.com/9.0/developer-guide/idc/idc-api-reference/alphabetical-list-of-idc-functions/681.md).

# ARM specific

```
Some ARM compilers in Thumb mode use BL (branch-and-link)
instead of B (branch) for long jumps, since BL has more range.
By default, IDA tries to determine if BL is a jump or a call.
You can override IDA's decision using commands in Edit/Other menu
(Force BL call/Force BL jump) or the following two functions.

//  Force BL instruction to be a jump
//       ea - address of the BL instruction
//  returns: 1-ok, 0-failed

success force_bl_jump(long ea);

//  Force BL instruction to be a call
//       ea - address of the BL instruction
//  returns: 1-ok, 0-failed

success force_bl_call(long ea);
```


---

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