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# T2 SDE: package/*/dosbox/ppc64le-dynrec-cache.diff
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Index: src/cpu/core_dynrec/cache.h
===================================================================
--- ./src/cpu/core_dynrec/cache.h	(revision 4296)
+++ ./src/cpu/core_dynrec/cache.h	(working copy)
@@ -553,8 +553,8 @@
 
 static void dyn_return(BlockReturn retcode,bool ret_exception);
 static void dyn_run_code(void);
+static void cache_block_closing(Bit8u* block_start,Bitu block_size);
 
-
 /* Define temporary pagesize so the MPROTECT case and the regular case share as much code as possible */
 #if (C_HAVE_MPROTECT)
 #define PAGESIZE_TEMP PAGESIZE
@@ -614,19 +614,25 @@
 		}
 		// setup the default blocks for block linkage returns
 		cache.pos=&cache_code_link_blocks[0];
+		core_dynrec.runcode=(BlockReturn (*)(Bit8u*))cache.pos;
+		// can use op to PAGESIZE_TEMP-64 bytes
+		dyn_run_code();
+		cache_block_closing(cache_code_link_blocks, cache.pos-cache_code_link_blocks);
+
+		cache.pos=&cache_code_link_blocks[PAGESIZE_TEMP-64];
 		link_blocks[0].cache.start=cache.pos;
 		// link code that returns with a special return code
+		// must be less than 32 bytes
 		dyn_return(BR_Link1,false);
-		cache.pos=&cache_code_link_blocks[32];
+		cache_block_closing(link_blocks[0].cache.start, cache.pos-link_blocks[0].cache.start);
+
+		cache.pos=&cache_code_link_blocks[PAGESIZE_TEMP-32];
 		link_blocks[1].cache.start=cache.pos;
 		// link code that returns with a special return code
+		// must be less than 32 bytes
 		dyn_return(BR_Link2,false);
+		cache_block_closing(link_blocks[1].cache.start, cache.pos-link_blocks[1].cache.start);
 
-		cache.pos=&cache_code_link_blocks[64];
-		core_dynrec.runcode=(BlockReturn (*)(Bit8u*))cache.pos;
-//		link_blocks[1].cache.start=cache.pos;
-		dyn_run_code();
-
 		cache.free_pages=0;
 		cache.last_page=0;
 		cache.used_pages=0;