cargo: bump aarch64-rt from 0.3.1 to 0.4.2 in /src/bare-metal/aps/examples #3003

dependabot · 2026-01-01T01:02:19Z

Bumps aarch64-rt from 0.3.1 to 0.4.2.

Release notes

0.4.2

Fixes

Made enable_mmu unsafe.

0.4.1

Improvements

Made set_exception_vector public.

Made enable_mmu public.

0.4.0

Breaking changes

Added ExceptionHandlers trait and exception_handlers! macro to define exception handlers, rather than relying on global symbols.

Added RegisterStateRef parameter to exception handlers to access the saved register state, and removed ELR and SPSR parameters.

start_core now takes an FnOnce rather than an fn and an argument. This allows arbitrary context to be captured in the closure.

Changelog

Sourced from aarch64-rt's changelog.

0.4.2

Fixes

Made enable_mmu unsafe.

0.4.1 (yanked)

Improvements

Made set_exception_vector public.

Made enable_mmu public.

0.4.0

Breaking changes

Added ExceptionHandlers trait and exception_handlers! macro to define exception handlers, rather than relying on global symbols.

Added RegisterStateRef parameter to exception handlers to access the saved register state, and removed ELR and SPSR parameters.

start_core now takes an FnOnce rather than an fn and an argument. This allows arbitrary context to be captured in the closure.

Commits

b04472f enable_mmu should be unsafe.
b76d4ca Prepare for 0.4.1 release.
2b57b4f Merge pull request #36 from google/entry
376a124 Make enable_mmu public.
8a24606 Make set_exception_vector public.
9866e64 Prepare for 0.4.0 release.
6176ec9 Clean up imports and add to changelog.
30b06d7 Merge pull request #31 from m4tx/start_core_arg
bb3a41b address review comments
4786357 fix the build
Additional commits viewable in compare view

Dependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting @dependabot rebase.

Dependabot commands and options

You can trigger Dependabot actions by commenting on this PR:

@dependabot rebase will rebase this PR
@dependabot recreate will recreate this PR, overwriting any edits that have been made to it
@dependabot merge will merge this PR after your CI passes on it
@dependabot squash and merge will squash and merge this PR after your CI passes on it
@dependabot cancel merge will cancel a previously requested merge and block automerging
@dependabot reopen will reopen this PR if it is closed
@dependabot close will close this PR and stop Dependabot recreating it. You can achieve the same result by closing it manually
@dependabot show <dependency name> ignore conditions will show all of the ignore conditions of the specified dependency
@dependabot ignore this major version will close this PR and stop Dependabot creating any more for this major version (unless you reopen the PR or upgrade to it yourself)
@dependabot ignore this minor version will close this PR and stop Dependabot creating any more for this minor version (unless you reopen the PR or upgrade to it yourself)
@dependabot ignore this dependency will close this PR and stop Dependabot creating any more for this dependency (unless you reopen the PR or upgrade to it yourself)

gribozavr · 2026-01-01T03:32:36Z

@qwandor I have pushed a commit to fix the build after this version bump. Could you review it?

Bumps [aarch64-rt](https://github.com/google/aarch64-rt) from 0.3.1 to 0.4.2. - [Release notes](https://github.com/google/aarch64-rt/releases) - [Changelog](https://github.com/google/aarch64-rt/blob/main/CHANGELOG.md) - [Commits](google/aarch64-rt@0.3.1...0.4.2) --- updated-dependencies: - dependency-name: aarch64-rt dependency-version: 0.4.2 dependency-type: direct:production update-type: version-update:semver-minor ... Signed-off-by: dependabot[bot] <support@github.com>

qwandor · 2026-01-02T15:37:33Z

src/bare-metal/aps/examples/src/exceptions.S

 .balign 0x800
 vector_table_el1:
+vector_table_el2:
+vector_table_el3:


Why do you need vector_table_el2 or vector_table_el3? These examples are only intended for EL1.

qwandor · 2026-01-02T15:38:37Z

src/bare-metal/aps/examples/src/main_rt.rs

 #![no_main]
 #![no_std]

+mod asm_exceptions;


The assembly files shouldn't be included here, main_rt should be using the exception vector provided by aarch64-rt instead.

qwandor · 2026-01-02T15:39:38Z

src/bare-metal/aps/examples/src/asm_exceptions.rs

 global_asm!(include_str!("exceptions.S"));
-global_asm!(include_str!("idmap.S"));


Why split this module up into three? All three assembly files should be used in all the examples that don't use aarch64-rt, and none of them should be used in the example that does.

gribozavr · 2026-01-02T22:18:28Z

@qwandor Thank you for the fixes! The short answer to your review questions is that I was approaching the errors mechanically without a deep investigation of what the code is doing (this is why I added you to the review!) So, for example, I added vector_table_el2 or vector_table_el3 because I got a linker error, so I assumed that the new version of aarch64-rt requires them unconditionaly. I did notice the newly introduced exception_handlers!() macro in the changelog, but refactoring the examples to use it seemed like a bigger change that might require updating the course narrative, so I decided not to. However that's exactly what you did, so thank you for the high-quality fixes!

…mples (google#3003) Bumps [aarch64-rt](https://github.com/google/aarch64-rt) from 0.3.1 to 0.4.2. --------- Signed-off-by: dependabot[bot] <support@github.com> Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com> Co-authored-by: Andrew Walbran <qwandor@google.com>

dependabot bot added dependencies Pull requests that update a dependency file rust Pull requests that update Rust code labels Jan 1, 2026

dependabot bot requested review from djmitche, mgeisler and qwandor as code owners January 1, 2026 01:02

dependabot bot added dependencies Pull requests that update a dependency file rust Pull requests that update Rust code labels Jan 1, 2026

dependabot bot force-pushed the dependabot/cargo/src/bare-metal/aps/examples/aarch64-rt-0.4.2 branch from d392b27 to 8cec020 Compare January 1, 2026 02:53

gribozavr assigned qwandor Jan 1, 2026

qwandor force-pushed the dependabot/cargo/src/bare-metal/aps/examples/aarch64-rt-0.4.2 branch from a77e7a0 to 53cbea6 Compare January 2, 2026 14:55

qwandor reviewed Jan 2, 2026

View reviewed changes

qwandor added 2 commits January 2, 2026 16:11

Fixes for new version of aarch64-rt.

d8c56dc

Build all binaries for bare metal AP examples.

cb27694

qwandor force-pushed the dependabot/cargo/src/bare-metal/aps/examples/aarch64-rt-0.4.2 branch from 53cbea6 to 656ac53 Compare January 2, 2026 16:13

qwandor added 3 commits January 2, 2026 16:25

Add page explaining aarch64-rt exception handling.

53e16e7

Include exception vector assembly in details.

385d3ad

Simplify exception vector code.

4d1ac18

qwandor force-pushed the dependabot/cargo/src/bare-metal/aps/examples/aarch64-rt-0.4.2 branch from 656ac53 to 4d1ac18 Compare January 2, 2026 16:25

qwandor approved these changes Jan 2, 2026

View reviewed changes

qwandor merged commit da6f4f6 into main Jan 2, 2026
40 checks passed

qwandor deleted the dependabot/cargo/src/bare-metal/aps/examples/aarch64-rt-0.4.2 branch January 2, 2026 16:38

Provide feedback

Saved searches

Use saved searches to filter your results more quickly

cargo: bump aarch64-rt from 0.3.1 to 0.4.2 in /src/bare-metal/aps/examples #3003

cargo: bump aarch64-rt from 0.3.1 to 0.4.2 in /src/bare-metal/aps/examples #3003

Uh oh!

dependabot bot commented on behalf of github Jan 1, 2026 •

edited

Loading

Uh oh!

gribozavr commented Jan 1, 2026

Uh oh!

qwandor Jan 2, 2026

Uh oh!

qwandor Jan 2, 2026

Uh oh!

qwandor Jan 2, 2026

Uh oh!

Uh oh!

gribozavr commented Jan 2, 2026 •

edited

Loading

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

2 participants

		global_asm!(include_str!("exceptions.S"));
		global_asm!(include_str!("idmap.S"));

cargo: bump aarch64-rt from 0.3.1 to 0.4.2 in /src/bare-metal/aps/examples #3003

cargo: bump aarch64-rt from 0.3.1 to 0.4.2 in /src/bare-metal/aps/examples #3003

Uh oh!

Conversation

dependabot bot commented on behalf of github Jan 1, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

0.4.2

Fixes

0.4.1

Improvements

0.4.0

Breaking changes

0.4.2

Fixes

0.4.1 (yanked)

Improvements

0.4.0

Breaking changes

Uh oh!

gribozavr commented Jan 1, 2026

Uh oh!

qwandor Jan 2, 2026

Choose a reason for hiding this comment

Uh oh!

qwandor Jan 2, 2026

Choose a reason for hiding this comment

Uh oh!

qwandor Jan 2, 2026

Choose a reason for hiding this comment

Uh oh!

Uh oh!

gribozavr commented Jan 2, 2026 • edited Loading Uh oh! There was an error while loading. Please reload this page.

Uh oh!

Uh oh!

Reviewers

Assignees

Labels

Projects

Milestone

Development

Uh oh!

2 participants

dependabot bot commented on behalf of github Jan 1, 2026 •

edited

Loading

gribozavr commented Jan 2, 2026 •

edited

Loading