Place function table after the executable.

Author: blueskythlikesclouds

PowerRecomp/recompiler.cpp

@@ -2390,6 +2390,30 @@ void Recompiler::Recompile(const std::filesystem::path& headerFilePath)
 
         println("");
 
+        println("#define PPC_IMAGE_BASE 0x{:X}ull", image.base);
+        println("#define PPC_IMAGE_SIZE 0x{:X}ull", image.size);
+        
+        // Extract the address of the minimum code segment to store the function table at.
+        size_t codeMin = ~0;
+        size_t codeMax = 0;
+
+        for (auto& section : image.sections)
+        {
+            if ((section.flags & SectionFlags_Code) != 0)
+            {
+                if (section.base < codeMin)
+                    codeMin = section.base;
+
+                if ((section.base + section.size) > codeMax)
+                    codeMax = (section.base + section.size);
+            }
+        }
+
+        println("#define PPC_CODE_BASE 0x{:X}ull", codeMin);
+        println("#define PPC_CODE_SIZE 0x{:X}ull", codeMax - codeMin);
+
+        println("");
+
         println("#ifdef PPC_INCLUDE_DETAIL");
         println("#include \"ppc_detail.h\"");
         println("#endif");

PowerUtils/ppc_context.h

@@ -105,12 +105,12 @@
 #define PPC_CALL_FUNC(x) x(ctx, base)
 #endif
 
-#define PPC_MEMORY_SIZE        0x100000000ull
-#define PPC_FUNC_TABLE_OFFSET  PPC_MEMORY_SIZE
-#define PPC_FUNC_TABLE_SIZE    0x200000000ull
+#define PPC_MEMORY_SIZE 0x100000000ull
+
+#define PPC_LOOKUP_FUNC(x, y) *(PPCFunc**)(x + PPC_IMAGE_BASE + PPC_IMAGE_SIZE + (uint64_t(uint32_t(y) - PPC_CODE_BASE) * 2))
 
 #ifndef PPC_CALL_INDIRECT_FUNC
-#define PPC_CALL_INDIRECT_FUNC(x) (*(PPCFunc**)(base + PPC_FUNC_TABLE_OFFSET + (uint64_t(x) * 2)))(ctx, base)
+#define PPC_CALL_INDIRECT_FUNC(x) (PPC_LOOKUP_FUNC(base, x))(ctx, base)
 #endif
 
 typedef void PPCFunc(struct PPCContext& __restrict__ ctx, uint8_t* base);