Landing: db8f7949a6b0
Project / Subsystem
gcc / risc-v
Date
2026-06-10
Author
Monk Chiang
Commit
db8f7949a6b074d7bdd1bf29801dd11eb967973f
Source
github
Perf win
No
Breaking
No
All attributes
- project
- gcc
- subsystem
- risc-v
- patch_id
- —
- commit_hash
- db8f7949a6b074d7bdd1bf29801dd11eb967973f
- source_type
- github
- headline
- GCC adds Zicfilp landing pad protection for setjmp and indirect returns
- tldr
- GCC now inserts Zicfilp landing pad protection at call sites for `setjmp` and functions with an `indirect_return` attribute, preventing control-flow manipulati…
- author
- Monk Chiang
- outcome
- committed
- performance_win
- false
- breaking_change
- false
- series_id
- —
- series_parts
- []
- tags
-
- • risc-v
- • zicfilp
- • security
- • cfi
- • attributes
- discussion_id_link
- —
- bugzilla_pr
- —
- date
- 2026-06-10T00:00:00.000Z
This update enhances Control-Flow Integrity (CFI) for the RISC-V Zicfilp extension by adding landing pad (LPAD) protection. It specifically targets setjmp and functions marked with a new indirect_return attribute, which may return to unexpected addresses. The compiler now emits a special instruction sequence at these call sites to safeguard against malicious modifications of the return address, though indirect calls to such functions remain unprotected.