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path: root/community/go-bootstrap/fix-arm-hackery.patch
blob: f5a447264c2220576207257a77bd39d8db6a5070 (plain) (tree)

































































































                                                                                                       
--- go/src/cmd/dist/arm.c
+++ go.fixed/src/cmd/dist/arm.c
@@ -11,8 +11,8 @@
 	return "6";
 }
 #else
-static void useVFPv3(void);
-static void useVFPv1(void);
+void useVFPv3(void);
+void useVFPv1(void);
 
 char *
 xgetgoarm(void)
@@ -26,46 +26,6 @@
 	else if(xtryexecfunc(useVFPv1))
 		return "6";
 	return "5";
-}
-
-static void
-useVFPv3(void)
-{
-	// try to run VFPv3-only "vmov.f64 d0, #112" instruction
-	// we can't use that instruction directly, because we
-	// might be compiling with a soft-float only toolchain.
-	//
-	// some newer toolchains are configured to use thumb
-	// by default, so we need to do some mode changing magic
-	// here.
-	// We can use "bx pc; nop" here, but GNU as(1) insists
-	// on warning us
-	// "use of r15 in bx in ARM mode is not really useful"
-	// so we workaround that by using "bx r0"
-	__asm__ __volatile__ ("mov r0, pc");
-	__asm__ __volatile__ ("bx r0");
-	__asm__ __volatile__ (".word 0xeeb70b00"); // vmov.f64 d0, #112
-	__asm__ __volatile__ (".word 0xe12fff1e"); // bx lr
-}
-
-static void
-useVFPv1(void)
-{
-	// try to run "vmov.f64 d0, d0" instruction
-	// we can't use that instruction directly, because we
-	// might be compiling with a soft-float only toolchain
-	//
-	// some newer toolchains are configured to use thumb
-	// by default, so we need to do some mode changing magic
-	// here.
-	// We can use "bx pc; nop" here, but GNU as(1) insists
-	// on warning us
-	// "use of r15 in bx in ARM mode is not really useful"
-	// so we workaround that by using "bx r0"
-	__asm__ __volatile__ ("mov r0, pc");
-	__asm__ __volatile__ ("bx r0");
-	__asm__ __volatile__ (".word 0xeeb00b40"); // vomv.f64 d0, d0
-	__asm__ __volatile__ (".word 0xe12fff1e"); // bx lr
 }
 
 #endif
--- go/src/make.bash
+++ go.fixed/src/make.bash
@@ -129,7 +132,7 @@
 if [ -z "$CC" -a -z "$(type -t gcc)" -a -n "$(type -t clang)" ]; then
 	export CC=clang CXX=clang++
 fi
-${CC:-gcc} $mflag -O2 -Wall -Werror -o cmd/dist/dist -Icmd/dist "$DEFGOROOT" cmd/dist/*.c
+${CC:-gcc} $mflag -O2 -Wall -Werror -o cmd/dist/dist -Icmd/dist "$DEFGOROOT" cmd/dist/*.c cmd/dist/*.S
 
 # -e doesn't propagate out of eval, so check success by hand.
 eval $(./cmd/dist/dist env -p || echo FAIL=true)
--- /dev/null	2014-12-09 07:52:31.203329541 -0200
+++ go.fixed/src/cmd/dist/arm.S	2014-12-09 10:29:34.149969243 -0200
@@ -0,0 +1,24 @@
+#ifdef __ARMEL__
+
+.text
+
+.global useVFPv3
+.hidden useVFPv3
+.type useVFPv3,%function
+useVFPv3:
+	mov r0, pc
+	bx r0
+	.word 0xeeb70b00 // vmov.f64 d0, #112
+	.word 0xe12fff1e // bx lr
+
+
+.global useVFPv1
+.hidden useVFPv1
+.type useVFPv1,%function
+useVFPv1:
+	mov r0, pc
+	bx r0
+	.word 0xeeb00b40 // vomv.f64 d0, d0
+	.word 0xe12fff1e // bx lr
+
+#endif