nodejs20/0003-PATCH-PPC-use-pc-relative-address-to-init-constpool-.patch

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From cefa0fd937cb48a8431e62268b2c9500b104d4e5 Mon Sep 17 00:00:00 2001
From: Junliang Yan <jyan@ca.ibm.com>
Date: Wed, 9 May 2018 18:39:49 -0400
Subject: [PATCH 3/4] [PATCH] PPC: use pc-relative address to init constpool
reg
R=joransiu@ca.ibm.com
Change-Id: I67364f29d494b09786a14b13743f73bef4b64582
Reviewed-on: https://chromium-review.googlesource.com/950242
Commit-Queue: Junliang Yan <jyan@ca.ibm.com>
Reviewed-by: Joran Siu <joransiu@ca.ibm.com>
Cr-Commit-Position: refs/heads/master@{#51750}
Signed-off-by: Stephen Gallagher <sgallagh@redhat.com>
---
deps/v8/src/ppc/macro-assembler-ppc.cc | 14 ++++++++++----
deps/v8/src/ppc/macro-assembler-ppc.h | 9 +++++----
2 files changed, 15 insertions(+), 8 deletions(-)
diff --git a/deps/v8/src/ppc/macro-assembler-ppc.cc b/deps/v8/src/ppc/macro-assembler-ppc.cc
index 68efa84c72c7f6d781d508183b53ea83024944d1..3192e9cefb1c1b116c5e12b5c52e7971b92a111a 100644
--- a/deps/v8/src/ppc/macro-assembler-ppc.cc
+++ b/deps/v8/src/ppc/macro-assembler-ppc.cc
@@ -166,11 +166,11 @@ void TurboAssembler::Call(Register target) {
DCHECK_EQ(CallSize(target), SizeOfCodeGeneratedSince(&start));
}
void MacroAssembler::CallJSEntry(Register target) {
- DCHECK(target == ip);
+ CHECK(target == r5);
Call(target);
}
int TurboAssembler::CallSize(Address target, RelocInfo::Mode rmode,
Condition cond) {
@@ -823,20 +823,27 @@ void TurboAssembler::ShiftRightAlgPair(Register dst_low, Register dst_high,
srawi(dst_high, src_high, shift);
}
}
#endif
-void MacroAssembler::LoadConstantPoolPointerRegisterFromCodeTargetAddress(
+void TurboAssembler::LoadConstantPoolPointerRegisterFromCodeTargetAddress(
Register code_target_address) {
lwz(kConstantPoolRegister,
MemOperand(code_target_address,
Code::kConstantPoolOffset - Code::kHeaderSize));
add(kConstantPoolRegister, kConstantPoolRegister, code_target_address);
}
+void TurboAssembler::LoadPC(Register dst) {
+ b(4, SetLK);
+ mflr(dst);
+}
+
void TurboAssembler::LoadConstantPoolPointerRegister() {
- mov_label_addr(kConstantPoolRegister, ConstantPoolPosition());
+ LoadPC(kConstantPoolRegister);
+ add_label_offset(kConstantPoolRegister, kConstantPoolRegister,
+ ConstantPoolPosition(), -pc_offset() + 4);
}
void TurboAssembler::StubPrologue(StackFrame::Type type) {
{
ConstantPoolUnavailableScope constant_pool_unavailable(this);
@@ -848,11 +855,10 @@ void TurboAssembler::StubPrologue(StackFrame::Type type) {
set_constant_pool_available(true);
}
}
void TurboAssembler::Prologue() {
- DCHECK(base != no_reg);
PushStandardFrame(r4);
if (FLAG_enable_embedded_constant_pool) {
// base contains prologue address
LoadConstantPoolPointerRegister();
set_constant_pool_available(true);
diff --git a/deps/v8/src/ppc/macro-assembler-ppc.h b/deps/v8/src/ppc/macro-assembler-ppc.h
index f4d9afd47f150f9cd2e840c20a61e965a5d8f5f5..32e6219c41bbbfe8427e05f2f9a02ff800efcffb 100644
--- a/deps/v8/src/ppc/macro-assembler-ppc.h
+++ b/deps/v8/src/ppc/macro-assembler-ppc.h
@@ -214,10 +214,11 @@ class TurboAssembler : public Assembler {
void LoadSingle(DoubleRegister dst, const MemOperand& mem,
Register scratch = no_reg);
void LoadSingleU(DoubleRegister dst, const MemOperand& mem,
Register scratch = no_reg);
+ void LoadPC(Register dst);
void StoreDouble(DoubleRegister src, const MemOperand& mem,
Register scratch = no_reg);
void StoreDoubleU(DoubleRegister src, const MemOperand& mem,
Register scratch = no_reg);
@@ -639,10 +640,14 @@ class TurboAssembler : public Assembler {
// Call a code stub.
void CallStubDelayed(CodeStub* stub);
void LoadConstantPoolPointerRegister();
+
+ // Loads the constant pool pointer (kConstantPoolRegister).
+ void LoadConstantPoolPointerRegisterFromCodeTargetAddress(
+ Register code_target_address);
void AbortConstantPoolBuilding() {
#ifdef DEBUG
// Avoid DCHECK(!is_linked()) failure in ~Label()
bind(ConstantPoolPosition());
#endif
@@ -733,14 +738,10 @@ class MacroAssembler : public TurboAssembler {
// Push and pop the registers that can hold pointers, as defined by the
// RegList constant kSafepointSavedRegisters.
void PushSafepointRegisters();
void PopSafepointRegisters();
- // Loads the constant pool pointer (kConstantPoolRegister).
- void LoadConstantPoolPointerRegisterFromCodeTargetAddress(
- Register code_target_address);
-
// Flush the I-cache from asm code. You should use CpuFeatures::FlushICache
// from C.
// Does not handle errors.
void FlushICache(Register address, size_t size, Register scratch);
--
2.17.0