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arch/x68_64: properly align ap boot stack for vector operations

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Signed-off-by: liwenxiang1 <liwenxiang1@xiaomi.com>
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liwenxiang1 2024-10-09 16:46:19 +08:00 • committed by Xiang Xiao
parent b4c4cbc28b
commit 5e15fff58a
1 changed files with 7 additions and 0 deletions
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7
arch/x86_64/src/intel64/intel64_head.S
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@ -398,6 +398,13 @@ ap_start:
/* Jump to ap_start routine */
movabs $x86_64_ap_boot, %rbx
/* We need to simulate the behavior of the call instruction, which by
* default pushes 8 bytes of the RIP. Otherwise, the function's stack
* won't be 16-byte aligned.
*/
pushq $0
jmp *%rbx
#endif