[mono][interp] Tweaks to x86 call convention handling #88466
Merged
Conversation
This file contains 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
|
Tagging subscribers to this area: @BrzVlad, @kotlarmilos Issue DetailsFirst, we no longer assert that the call convetion is cdecl on the slowpath. The pinvoke trampoline on x86 restores the saved stack pointer so it doesn't matter if the pinvoke callee pops or not the stack. Therefore both stdcall and cdecl calls should be supported with the same path. Untested. Second, we use the fastpath (which uses the C call convention) only if the pinvoke signature is also cdecl, otherwise we have cconv mismatch.
|
vargaz
approved these changes
Jul 6, 2023
BrzVlad
force-pushed
the
fix-interp-x86-cconv
branch
from
98d2ccc to
cd379a1
Compare
First, we no longer assert that the call convetion is cdecl on the slowpath. The pinvoke trampoline on x86 restores the saved stack pointer so it doesn't matter if the pinvoke callee pops or not the stack. Therefore both stdcall and cdecl calls should be supported with the same path. Untested. Second, we use the fastpath (which uses the C call convention) only if the pinvoke signature is also cdecl, otherwise we have cconv mismatch.
BrzVlad
force-pushed
the
fix-interp-x86-cconv
branch
from
cd379a1 to
dbfd395
Compare
ghost
locked as resolved and limited conversation to collaborators
Sign up for free
to subscribe to this conversation on GitHub.
Already have an account?
Sign in.
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Outdated suggestions cannot be applied.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.
First, we no longer assert that the call convetion is cdecl on the slowpath. The pinvoke trampoline on x86 restores the saved stack pointer so it doesn't matter if the pinvoke callee pops or not the stack. Therefore both stdcall and cdecl calls should be supported with the same path. Untested.
Second, we use the fastpath (which uses the C call convention) only if the pinvoke signature is also cdecl, otherwise we have cconv mismatch.