mirror of
https://git.freebsd.org/ports.git
synced 2025-06-23 05:30:31 -04:00
f88751e60a
Build cross platform desktop apps with JavaScript, HTML, and CSS. It's easier than you think. If you can build a website, you can build a desktop app. Electron is a framework for creating native applications with web technologies like JavaScript, HTML, and CSS. It takes care of the hard parts so you can focus on the core of your application. WWW: https://electronjs.org/
51 lines
2.5 KiB
C++
51 lines
2.5 KiB
C++
--- v8/src/wasm/jump-table-assembler.cc.orig 2023-11-29 21:41:54 UTC
|
|
+++ v8/src/wasm/jump-table-assembler.cc
|
|
@@ -74,15 +74,21 @@ void JumpTableAssembler::EmitLazyCompileJumpSlot(uint3
|
|
#if V8_TARGET_ARCH_X64
|
|
void JumpTableAssembler::EmitLazyCompileJumpSlot(uint32_t func_index,
|
|
Address lazy_compile_target) {
|
|
+ intptr_t displacement =
|
|
+ static_cast<intptr_t>(reinterpret_cast<uint8_t*>(lazy_compile_target) -
|
|
+ (pc_ + 9) - kNearJmpInstrSize);
|
|
+ if (!is_int32(displacement)) return;
|
|
+ CodeEntry(); // 4 bytes
|
|
// Use a push, because mov to an extended register takes 6 bytes.
|
|
- pushq_imm32(func_index); // 5 bytes
|
|
- EmitJumpSlot(lazy_compile_target); // 5 bytes
|
|
+ pushq_imm32(func_index); // 5 bytes
|
|
+ near_jmp(displacement, RelocInfo::NO_INFO); // 5 bytes
|
|
}
|
|
|
|
bool JumpTableAssembler::EmitJumpSlot(Address target) {
|
|
intptr_t displacement = static_cast<intptr_t>(
|
|
- reinterpret_cast<uint8_t*>(target) - pc_ - kNearJmpInstrSize);
|
|
+ reinterpret_cast<uint8_t*>(target) - (pc_ + 4) - kNearJmpInstrSize);
|
|
if (!is_int32(displacement)) return false;
|
|
+ CodeEntry(); // 4 bytes
|
|
near_jmp(displacement, RelocInfo::NO_INFO); // 5 bytes
|
|
return true;
|
|
}
|
|
@@ -90,11 +96,12 @@ void JumpTableAssembler::EmitFarJumpSlot(Address targe
|
|
void JumpTableAssembler::EmitFarJumpSlot(Address target) {
|
|
Label data;
|
|
int start_offset = pc_offset();
|
|
+ CodeEntry(); // 4 bytes
|
|
jmp(Operand(&data)); // 6 bytes
|
|
- Nop(2); // 2 bytes
|
|
+ Nop(6); // 6 bytes
|
|
// The data must be properly aligned, so it can be patched atomically (see
|
|
// {PatchFarJumpSlot}).
|
|
- DCHECK_EQ(start_offset + kSystemPointerSize, pc_offset());
|
|
+ DCHECK_EQ(start_offset + kFarJumpTableSlotOffset, pc_offset());
|
|
USE(start_offset);
|
|
bind(&data);
|
|
dq(target); // 8 bytes
|
|
@@ -105,7 +112,7 @@ void JumpTableAssembler::PatchFarJumpSlot(Address slot
|
|
// The slot needs to be pointer-size aligned so we can atomically update it.
|
|
DCHECK(IsAligned(slot, kSystemPointerSize));
|
|
// Offset of the target is at 8 bytes, see {EmitFarJumpSlot}.
|
|
- reinterpret_cast<std::atomic<Address>*>(slot + kSystemPointerSize)
|
|
+ reinterpret_cast<std::atomic<Address>*>(slot + kFarJumpTableSlotOffset)
|
|
->store(target, std::memory_order_relaxed);
|
|
// The update is atomic because the address is properly aligned.
|
|
// Because of cache coherence, the data update will eventually be seen by all
|