cmd/cc,runtime: change preprocessor to expand macros inside of

#pragma textflag and #pragma dataflag directives.
Update dataflag directives to use symbols instead of integer constants.

R=golang-dev, bradfitz
CC=golang-dev
https://golang.org/cl/13310043

7 files changed, 10 insertions, 8 deletions

diff --git a/src/pkg/runtime/hashmap.c b/src/pkg/runtime/hashmap.c
index a721d4a535..36cbda5abe 100644
--- a/src/pkg/runtime/hashmap.c
+++ b/src/pkg/runtime/hashmap.c
@@ -8,6 +8,7 @@
 #include "hashmap.h"
 #include "type.h"
 #include "race.h"
+#include "../../cmd/ld/textflag.h"
 
 // This file contains the implementation of Go's map type.
 //
@@ -524,7 +525,7 @@ hash_lookup(MapType *t, Hmap *h, byte **keyp)
 }
 
 // When an item is not found, fast versions return a pointer to this zeroed memory.
-#pragma dataflag 16 // no pointers
+#pragma dataflag RODATA
 static uint8 empty_value[MAXVALUESIZE];
 
 // Specialized versions of mapaccess1 for specific types.
@@ -593,7 +594,6 @@ static uint8 empty_value[MAXVALUESIZE];
 #define SLOW_EQ(x,y) runtime·memeq((x).str, (y).str, (x).len)
 #define MAYBE_EQ(x,y) (*(CHECKTYPE*)(x).str == *(CHECKTYPE*)(y).str && *(CHECKTYPE*)((x).str + (x).len - sizeof(CHECKTYPE)) == *(CHECKTYPE*)((y).str + (x).len - sizeof(CHECKTYPE)))
 #include "hashmap_fast.c"
-#include "../../cmd/ld/textflag.h"
 
 static void
 hash_insert(MapType *t, Hmap *h, void *key, void *value)
diff --git a/src/pkg/runtime/malloc.goc b/src/pkg/runtime/malloc.goc
index 405eae1f11..a28e35d04b 100644
--- a/src/pkg/runtime/malloc.goc
+++ b/src/pkg/runtime/malloc.goc
@@ -17,7 +17,7 @@ package runtime
 #include "../../cmd/ld/textflag.h"
 
 // Mark mheap as 'no pointers', it does not contain interesting pointers but occupies ~45K.
-#pragma dataflag 16
+#pragma dataflag NOPTR
 MHeap runtime·mheap;
 
 int32	runtime·checking;
diff --git a/src/pkg/runtime/mgc0.c b/src/pkg/runtime/mgc0.c
index 9fbf008b4a..23e1140465 100644
--- a/src/pkg/runtime/mgc0.c
+++ b/src/pkg/runtime/mgc0.c
@@ -14,6 +14,7 @@
 #include "typekind.h"
 #include "hashmap.h"
 #include "funcdata.h"
+#include "../../cmd/ld/textflag.h"
 
 enum {
 	Debug = 0,
@@ -299,7 +300,7 @@ struct BufferList
 	uint32 busy;
 	byte pad[CacheLineSize];
 };
-#pragma dataflag 16  // no pointers
+#pragma dataflag NOPTR
 static BufferList bufferList[MaxGcproc];
 
 static Type *itabtype;
diff --git a/src/pkg/runtime/os_linux.c b/src/pkg/runtime/os_linux.c
index 0c2c40441a..cb45fe8cee 100644
--- a/src/pkg/runtime/os_linux.c
+++ b/src/pkg/runtime/os_linux.c
@@ -169,7 +169,7 @@ runtime·get_random_data(byte **rnd, int32 *rnd_len)
 		*rnd = runtime·startup_random_data;
 		*rnd_len = runtime·startup_random_data_len;
 	} else {
-		#pragma dataflag 16 // no pointers
+		#pragma dataflag NOPTR
 		static byte urandom_data[HashRandomBytes];
 		int32 fd;
 		fd = runtime·open("/dev/urandom", 0 /* O_RDONLY */, 0);
diff --git a/src/pkg/runtime/os_plan9.c b/src/pkg/runtime/os_plan9.c
index 2f6d4f224f..07db2c3055 100644
--- a/src/pkg/runtime/os_plan9.c
+++ b/src/pkg/runtime/os_plan9.c
@@ -324,7 +324,7 @@ runtime·memlimit(void)
 	return 0;
 }
 
-#pragma dataflag 16 // no pointers
+#pragma dataflag NOPTR
 static int8 badsignal[] = "runtime: signal received on thread not created by Go.\n";
 
 // This runs on a foreign stack, without an m or a g.  No stack split.
diff --git a/src/pkg/runtime/os_windows.c b/src/pkg/runtime/os_windows.c
index 96d9f91c5b..c3e296aa67 100644
--- a/src/pkg/runtime/os_windows.c
+++ b/src/pkg/runtime/os_windows.c
@@ -478,7 +478,7 @@ runtime·memlimit(void)
 	return 0;
 }
 
-#pragma dataflag 16 // no pointers
+#pragma dataflag NOPTR
 int8 runtime·badsignalmsg[] = "runtime: signal received on thread not created by Go.\n";
 int32 runtime·badsignallen = sizeof runtime·badsignalmsg - 1;
 
diff --git a/src/pkg/runtime/sema.goc b/src/pkg/runtime/sema.goc
index 51a38adafe..57f32a0ddb 100644
--- a/src/pkg/runtime/sema.goc
+++ b/src/pkg/runtime/sema.goc
@@ -20,6 +20,7 @@
 package sync
 #include "runtime.h"
 #include "arch_GOARCH.h"
+#include "../../cmd/ld/textflag.h"
 
 typedef struct SemaWaiter SemaWaiter;
 struct SemaWaiter
@@ -50,7 +51,7 @@ struct semtable
 	SemaRoot;
 	uint8 pad[CacheLineSize-sizeof(SemaRoot)];
 };
-#pragma dataflag 16 /* mark semtable as 'no pointers', hiding from garbage collector */
+#pragma dataflag NOPTR /* mark semtable as 'no pointers', hiding from garbage collector */
 static struct semtable semtable[SEMTABLESZ];
 
 static SemaRoot*