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[v20.x] deps: V8: backport 6a0a25abaed3 #61687

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[v20.x] deps: V8: backport 6a0a25abaed3 #61687

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deps: V8: backport 6a0a25abaed3 
Original commit message:

    [riscv] Fix sp handling in MacroAssembler::LeaveFrame

    Keep sp <= fp to ensure that data right above fp doesn't get clobbered
    by an inopportune signal and its handler.

    Such clobbering can happen in e.g. Node.js when JIT-compiled code is
    interrupted by a SIGCHLD handler.

    Bug: None
    Change-Id: Ief0836032ada7942e89f081f7605f61632c4d414
    Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/7540554
    Reviewed-by: Ji Qiu <qiuji@iscas.ac.cn>
    Commit-Queue: Yahan Lu (LuYahan) <yahan@iscas.ac.cn>
    Reviewed-by: Rezvan Mahdavi Hezaveh <rezvan@chromium.org>
    Cr-Commit-Position: refs/heads/main@{#105069}

Refs: v8/v8@6a0a25a
Co-authored-by: kxxt <rsworktech@outlook.com>
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@dramforever @kxxt
dramforever and kxxt committed Feb 4, 2026
commit 5993c41044f4998f072cfa411aa83ba9c2bd94e6
2 changes: 1 addition & 1 deletion common.gypi
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Expand Up @@ -36,7 +36,7 @@

# Reset this number to 0 on major V8 upgrades.
# Increment by one for each non-official patch applied to deps/v8.
'v8_embedder_string': '-node.33',
'v8_embedder_string': '-node.34',

##### V8 defaults for Node.js #####

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1 change: 1 addition & 0 deletions deps/v8/AUTHORS
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Expand Up @@ -264,6 +264,7 @@ Vadim Gorbachev <bmsdave@gmail.com>
Varun Varada <varuncvarada@gmail.com>
Victor Costan <costan@gmail.com>
Victor Polevoy <fx@thefx.co>
Vivian Wang <wangruikang@iscas.ac.cn>
Vlad Burlik <vladbph@gmail.com>
Vladimir Krivosheev <develar@gmail.com>
Vladimir Shutoff <vovan@shutoff.ru>
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3 changes: 2 additions & 1 deletion deps/v8/src/codegen/riscv/macro-assembler-riscv.cc
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Expand Up @@ -5530,9 +5530,10 @@ void MacroAssembler::EnterFrame(StackFrame::Type type) {

void MacroAssembler::LeaveFrame(StackFrame::Type type) {
ASM_CODE_COMMENT(this);
addi(sp, fp, 2 * kSystemPointerSize);
Move(sp, fp);
LoadWord(ra, MemOperand(fp, 1 * kSystemPointerSize));
LoadWord(fp, MemOperand(fp, 0 * kSystemPointerSize));
AddWord(sp, sp, 2 * kSystemPointerSize);
}

void MacroAssembler::EnterExitFrame(int stack_space,
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