bjoernager/rust
bjoernager/rust
1
Fork 0
Code Activity

Add -Zfunction-return={keep,thunk-extern} option

Browse source 
This is intended to be used for Linux kernel RETHUNK builds.

With this commit (optionally backported to Rust 1.73.0), plus a
patched Linux kernel to pass the flag, I get a RETHUNK build with
Rust enabled that is `objtool`-warning-free and is able to boot in
QEMU and load a sample Rust kernel module.

Signed-off-by: Miguel Ojeda <ojeda@kernel.org>
This commit is contained in:
Miguel Ojeda 2023-10-18 16:58:17 +02:00
parent d3c9964c20
commit 2d476222e8
17 changed files with 215 additions and 9 deletions
Download patch file Download diff file Expand all files Collapse all files

4
compiler/rustc_session/messages.ftl
View file

@ -26,6 +26,10 @@ session_file_is_not_writeable = output file {$file} is not writeable -- check it
session_file_write_fail = failed to write `{$path}` due to error `{$err}`
session_function_return_requires_x86_or_x86_64 = `-Zfunction-return` (except `keep`) is only supported on x86 and x86_64
session_function_return_thunk_extern_requires_non_large_code_model = `-Zfunction-return=thunk-extern` is only supported on non-large code models
session_hexadecimal_float_literal_not_supported = hexadecimal float literal is not supported
session_incompatible_linker_flavor = linker flavor `{$flavor}` is incompatible with the current target