From ebf50edb79be896199a792c4c2813ac54bc9fad8 Mon Sep 17 00:00:00 2001
From: Stenzek <stenzek@gmail.com>
Date: Wed, 26 Jun 2024 16:41:47 +1000
Subject: [PATCH] System: Allocate JIT space before fastmem area

On Intel MacOS 14, the fastmem area gets allocated close to the
executable base, leaving no region free +/- 2GB for the JIT area.
---
 src/core/system.cpp          | 2 +-
 src/util/jit_code_buffer.cpp | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/core/system.cpp b/src/core/system.cpp
index 36e13118c..900bd5a27 100644
--- a/src/core/system.cpp
+++ b/src/core/system.cpp
@@ -332,7 +332,7 @@ bool System::Internal::CPUThreadInitialize(Error* error)
   }
 #endif
 
-  if (!Bus::AllocateMemory(error) || !CPU::CodeCache::ProcessStartup(error))
+  if (!CPU::CodeCache::ProcessStartup(error) || !Bus::AllocateMemory(error))
   {
     CPUThreadShutdown();
     return false;
diff --git a/src/util/jit_code_buffer.cpp b/src/util/jit_code_buffer.cpp
index a463bf813..2e4976a31 100644
--- a/src/util/jit_code_buffer.cpp
+++ b/src/util/jit_code_buffer.cpp
@@ -60,7 +60,7 @@ bool JitCodeBuffer::Allocate(u32 size /* = 64 * 1024 * 1024 */, u32 far_code_siz
                             reinterpret_cast<const u8*>(std::numeric_limits<uintptr_t>::max()) :
                             (base + max_displacement);
   const u8* min_address = ((base - max_displacement) > base) ? nullptr : (base - max_displacement);
-  const u32 step = 256 * 1024 * 1024;
+  const u32 step = 64 * 1024 * 1024;
   const u32 steps = static_cast<u32>(max_address - min_address) / step;
   for (u32 offset = 0; offset < steps; offset++)
   {