# std.debug: FP-based unwinding is impossible on avr, csky, msp430, and xcore · gitcafe/zig

[View on GitCafe](https://git.cafe/gitcafe/zig/commit/2eca0e42e59fafae839b507148e8a3679d172079)

Repository: [gitcafe/zig](https://git.cafe/gitcafe/zig)

Visibility: public

Requested revision: 2eca0e42e59fafae839b507148e8a3679d172079

Requested commit: 2eca0e42e59fafae839b507148e8a3679d172079

Commit: 2eca0e42e59fafae839b507148e8a3679d172079

Tree: d4faef4edaa3569ff19e4ce2f8bb25e3a70e98ca

Author: Alex Rønne Petersen

Committer: Alex Rønne Petersen

## Message

```
std.debug: FP-based unwinding is impossible on avr, csky, msp430, and xcore

The ABIs do not define a frame pointer register, nor do they define a guaranteed
and fixed area on the stack where one might find saved registers such as a frame
pointer or return address.

```

## Parents

- [1f8a72175b5352e77b41ed4d165acccad08ffb16](https://git.cafe/gitcafe/zig/commit/1f8a72175b5352e77b41ed4d165acccad08ffb16?format=markdown)

[Source at this commit](https://git.cafe/gitcafe/zig/tree/2eca0e42e59fafae839b507148e8a3679d172079?format=markdown)