Align VEX V5 boot routine to 4 bytes #148272
Merged
+1 −1
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters. Learn more about bidirectional Unicode characters
| These commits modify compiler targets. |
rustbot added S-waiting-on-review 
| r? saethlin |
bors added S-waiting-on-bors 
bors added a commit that referenced this pull request Oct 30, 2025
Rollup of 8 pull requests Successful merges: - #138217 (Turn `Cow::is_borrowed,is_owned` into associated functions.) - #147858 (Micro-optimization attempt in coroutine layout computation) - #147923 (Simplify rustc_public context handling) - #148115 (rustdoc: Rename unstable option `--nocapture` to `--no-capture` in accordance with `libtest`) - #148137 (Couple of changes for Redox OS) - #148176 ([rustdoc] Include attribute and derive macros when filtering on "macros") - #148253 (Handle default features and -Ctarget-features in the dummy backend) - #148272 (Align VEX V5 boot routine to 4 bytes) r? `@ghost` `@rustbot` modify labels: rollup
rust-timer added a commit that referenced this pull request Oct 30, 2025
Rollup merge of #148272 - vexide:fix/linker-script-align, r=saethlin Align VEX V5 boot routine to 4 bytes This PR fixes an alignment issue with the initialization routine on the VEX V5 target. Previously, if the `.text` output section contained any functions aligned to more than four bytes, the linker would add padding bytes before the beginning of `.text` rather than changing the position of the aligned function inside the section itself. This is an issue because the entry point for the program needs to be located at `0x3800_0020` on this platform and the addition of padding could cause it to be moved. To fix this, I've forced the start address of the `.text` section to be aligned to 4 bytes so that the entry point is placed consistently. Items inside the section can still be aligned to values larger than this.
Sign up for free to join this conversation on GitHub. Already have an account? Sign in to comment
5 participants
Add this suggestion to a batch that can be applied as a single commit. This suggestion is invalid because no changes were made to the code. Suggestions cannot be applied while the pull request is closed. Suggestions cannot be applied while viewing a subset of changes. Only one suggestion per line can be applied in a batch. Add this suggestion to a batch that can be applied as a single commit. Applying suggestions on deleted lines is not supported. You must change the existing code in this line in order to create a valid suggestion. Outdated suggestions cannot be applied. This suggestion has been applied or marked resolved. Suggestions cannot be applied from pending reviews. Suggestions cannot be applied on multi-line comments. Suggestions cannot be applied while the pull request is queued to merge. Suggestion cannot be applied right now. Please check back later.
This PR fixes an alignment issue with the initialization routine on the VEX V5 target.
Previously, if the
.textoutput section contained any functions aligned to more than four bytes, the linker would add padding bytes before the beginning of.textrather than changing the position of the aligned function inside the section itself. This is an issue because the entry point for the program needs to be located at0x3800_0020on this platform and the addition of padding could cause it to be moved.To fix this, I've forced the start address of the
.textsection to be aligned to 4 bytes so that the entry point is placed consistently. Items inside the section can still be aligned to values larger than this.