[Git][wine/wine][master] include: Ensure that x86_64 syscall thunks have a consistent length when built with Clang.

[Alexandre Julliard (＠julliard)]

Alexandre Julliard pushed to branch master at wine / wine

Commits:
0291c9f9 by Brendan Shanks at 2024-07-31T21:06:48+02:00
include: Ensure that x86_64 syscall thunks have a consistent length when built with Clang.

GCC always assembles 'jmp 1f' to 'eb 01', as does Clang when using -O1
or higher optimization.
But with -O0, Clang outputs 'e9 01 00 00 00'.

The 'subq $0xb,0x70(%rcx)' line in __wine_syscall_dispatcher relies on
'jmp 1f' being 2 bytes.

Based on patch by Alex S.

- - - - -

1 changed file:

- include/wine/asm.h

View it on GitLab: https://gitlab.winehq.org/wine/wine/-/commit/0291c9f9fb5d759a6b464cbb55ba3de...