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arch/x64: Fix crash issue after enabling KASAN

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After up_fork calls the x86_64_fork function, the rsp must be 16-byte aligned; otherwise, the movaps %xmm0, (%rsp) instruction may cause a crash.

Signed-off-by: liwenxiang1 <liwenxiang1@xiaomi.com>
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liwenxiang1 2025-07-18 15:06:54 +08:00 • committed by Alan C. Assis
parent 0dc0b94380
commit f730a86d22
1 changed files with 4 additions and 0 deletions
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4
arch/x86_64/src/common/fork.S
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@ -118,10 +118,14 @@ up_fork:
pushq %r12
movq %rsp, %rdi
subq $8, %rsp
/* call function */
callq x86_64_fork
addq $8, %rsp
/* Do not modify return value %rax */
/* Restore non-volatile registers */