deps: V8: cherry-pick 7889803e82d3

Original commit message: [mips] Use t9 as the function call register. on mips, we should use t9 when jump to a ExternalReference, because the callee function will consider t9 as the function start address. Change-Id: I56e2bf073fd24b2f3434dfd255d48264bfd0b2cd Reviewed-on: https://chromium-review.googlesource.com/c/v8/v8/+/1826417 Auto-Submit: Yu Yin <[email protected]> Commit-Queue: Jakob Kummerow <[email protected]> Reviewed-by: Jakob Kummerow <[email protected]> Cr-Commit-Position: refs/heads/master@{#63988} Refs: v8/v8@7889803
nodejs · Aug 15, 2020 · 52b7aee · 52b7aee
1 parent 04df3da
commit 52b7aee
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Showing 3 changed files with 5 additions and 9 deletions.
diff --git a/common.gypi b/common.gypi
@@ -34,7 +34,7 @@
 
     # 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.39',
+    'v8_embedder_string': '-node.40',
 
     ##### V8 defaults for Node.js #####
 

diff --git a/deps/v8/src/codegen/mips/macro-assembler-mips.cc b/deps/v8/src/codegen/mips/macro-assembler-mips.cc
@@ -3853,10 +3853,8 @@ void TurboAssembler::Jump(Handle<Code> code, RelocInfo::Mode rmode,
 }
 
 void TurboAssembler::Jump(const ExternalReference& reference) {
-  UseScratchRegisterScope temps(this);
-  Register scratch = temps.Acquire();
-  li(scratch, reference);
-  Jump(scratch);
+  li(t9, reference);
+  Jump(t9);
 }
 
 void MacroAssembler::JumpIfIsInRange(Register value, unsigned lower_limit,

diff --git a/deps/v8/src/codegen/mips64/macro-assembler-mips64.cc b/deps/v8/src/codegen/mips64/macro-assembler-mips64.cc
@@ -4202,10 +4202,8 @@ void TurboAssembler::Jump(Handle<Code> code, RelocInfo::Mode rmode,
 }
 
 void TurboAssembler::Jump(const ExternalReference& reference) {
-  UseScratchRegisterScope temps(this);
-  Register scratch = temps.Acquire();
-  li(scratch, reference);
-  Jump(scratch);
+  li(t9, reference);
+  Jump(t9);
 }
 
 // Note: To call gcc-compiled C code on mips, you must call through t9.