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Kernel: Disambiguate instruction size for mov in read_gs_ptr

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Previously we allowed using immediate values here which is ambiguous
as to which specific mov instruction the compiler should choose.
This commit is contained in:
Gunnar Beutner 2021-08-11 08:37:11 +02:00 committed by Andreas Kling
parent 8545bd5fdb
commit 9964c106ad
Notes: sideshowbarker 2024-07-18 07:07:16 +09:00 
Author: https://github.com/gunnarbeutner
Commit: https://github.com/SerenityOS/serenity/commit/9964c106ad5
Pull-request: https://github.com/SerenityOS/serenity/pull/9335
1 changed files with 1 additions and 1 deletions
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2
Kernel/Arch/x86/ASM_wrapper.h
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@ -75,7 +75,7 @@ ALWAYS_INLINE FlatPtr read_gs_ptr(FlatPtr offset)
ALWAYS_INLINE void write_gs_ptr(u32 offset, FlatPtr val)
{
asm volatile(
"mov %[val], %%gs:%a[off]" ::[off] "ir"(offset), [val] "ir"(val)
"mov %[val], %%gs:%a[off]" ::[off] "ir"(offset), [val] "r"(val)
: "memory");
}