cmd/link: change flag from -relro to -bindnow

Signed-off-by: Morten Linderud <[email protected]>

Author: Foxboron

src/cmd/link/doc.go

@@ -87,8 +87,9 @@ Flags:
 		instead of $GOROOT/pkg/$GOOS_$GOARCH.
 	-k symbol
 		Set field tracking symbol. Use this flag when GOEXPERIMENT=fieldtrack is set.
-	-relro
-		Enable RELRO (default true).
+	-bindnow
+		When linking externally and marking variables read-only after relocation, also require
+		immediate function binding (default true)
 	-libgcc file
 		Set name of compiler support library.
 		This is only used in internal link mode.

src/cmd/link/internal/ld/lib.go

@@ -1408,7 +1408,7 @@ func (ctxt *Link) hostlink() {
 	addRELROargs := func(argv []string) []string {
 		relro := "-Wl,-z,relro"
 		// Enable Full RELRO
-		if *FlagRelro {
+		if *FlagBindNow {
 			relro += ",-z,now"
 		}
 		argv = append(argv, relro)

src/cmd/link/internal/ld/main.go

@@ -95,7 +95,7 @@ var (
 	FlagDebugTextSize = flag.Int("debugtextsize", 0, "debug text section max size")
 	flagDebugNosplit  = flag.Bool("debugnosplit", false, "dump nosplit call graph")
 	FlagStrictDups    = flag.Int("strictdups", 0, "sanity check duplicate symbol contents during object file reading (1=warn 2=err).")
-	FlagRelro         = flag.Bool("relro", true, "enable RELRO for buildmode=pie")
+	FlagBindNow       = flag.Bool("bindnow", true, "bind function calls when linking externally")
 	FlagRound         = flag.Int("R", -1, "set address rounding `quantum`")
 	FlagTextAddr      = flag.Int64("T", -1, "set text segment `address`")
 	flagEntrySymbol   = flag.String("E", "", "set `entry` symbol name")