cmd/link: enable -buildmode=c-shared for ppc64le

This enables -buildmode=c-shared on ppc64le. It is described in golang issue golang#20756
powertechpreview · Feb 2, 2018 · 81cb08d · 81cb08d
1 parent 62a63a7
commit 81cb08d
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Showing 4 changed files with 3 additions and 5 deletions.
diff --git a/src/cmd/dist/test.go b/src/cmd/dist/test.go
@@ -824,7 +824,7 @@ func (t *tester) supportedBuildmode(mode string) bool {
 		return false
 	case "c-shared":
 		switch pair {
-		case "linux-386", "linux-amd64", "linux-arm", "linux-arm64",
+		case "linux-386", "linux-amd64", "linux-arm", "linux-arm64", "linux-ppc64le",
 			"darwin-amd64", "darwin-386",
 			"android-arm", "android-arm64", "android-386":
 			return true

diff --git a/src/cmd/go/internal/work/build.go b/src/cmd/go/internal/work/build.go
@@ -293,7 +293,7 @@ func BuildModeInit() {
 			codegenArg = "-fPIC"
 		} else {
 			switch platform {
-			case "linux/amd64", "linux/arm", "linux/arm64", "linux/386",
+			case "linux/amd64", "linux/arm", "linux/arm64", "linux/386", "linux/ppc64le",
 				"android/amd64", "android/arm", "android/arm64", "android/386":
 				codegenArg = "-shared"
 			case "darwin/amd64", "darwin/386":

diff --git a/src/cmd/link/internal/ld/config.go b/src/cmd/link/internal/ld/config.go
@@ -63,7 +63,7 @@ func (mode *BuildMode) Set(s string) error {
 		*mode = BuildmodeCArchive
 	case "c-shared":
 		switch objabi.GOARCH {
-		case "386", "amd64", "arm", "arm64":
+		case "386", "amd64", "arm", "arm64", "ppc64le":
 		default:
 			return badmode()
 		}

diff --git a/src/runtime/rt0_linux_ppc64le.s b/src/runtime/rt0_linux_ppc64le.s
@@ -10,7 +10,6 @@ TEXT _rt0_ppc64le_linux_lib(SB),NOSPLIT,$-8
 	MOVD	R0, 16(R1) // Save LR in caller's frame.
 	MOVW	CR, R0     // Save CR in caller's frame
 	MOVD	R0, 8(R1)
-	MOVD	R2, 24(R1) // Save TOC in caller's frame.
 	MOVDU	R1, -320(R1) // Allocate frame.
 
 	// Preserve callee-save registers.
@@ -121,7 +120,6 @@ done:
 	FMOVD	304(R1), F31
 
 	ADD	$320, R1
-	MOVD	24(R1), R2
 	MOVD	8(R1), R0
 	MOVFL	R0, $0xff
 	MOVD	16(R1), R0