cmd/ld: add a text generation pass

This will be used by ppc64 to add call stubs to the .text section.
ARM needs a similar pass to generate veneers for arm->thumb
transitions.

Change-Id: Iaee74036e60643a56fab15b564718f359c5910eb
Reviewed-on: https://go-review.googlesource.com/2004
Reviewed-by: Russ Cox <rsc@golang.org>

6 files changed, 22 insertions, 0 deletions

diff --git a/src/cmd/5l/asm.c b/src/cmd/5l/asm.c
index 9c1c04e2d4..017d3f4357 100644
--- a/src/cmd/5l/asm.c
+++ b/src/cmd/5l/asm.c
@@ -69,6 +69,11 @@ static void	addpltsym(Link*, LSym*);
 static void	addgotsym(Link*, LSym*);
 static void	addgotsyminternal(Link*, LSym*);
 
+void
+gentext(void)
+{
+}
+
 // Preserve highest 8 bits of a, and do addition to lower 24-bit
 // of a and b; used to adjust ARM branch intruction's target
 static int32
diff --git a/src/cmd/6l/asm.c b/src/cmd/6l/asm.c
index 18b5aa3119..41c9cc84c6 100644
--- a/src/cmd/6l/asm.c
+++ b/src/cmd/6l/asm.c
@@ -74,6 +74,11 @@ static void addpltsym(LSym*);
 static void addgotsym(LSym*);
 
 void
+gentext(void)
+{
+}
+
+void
 adddynrela(LSym *rela, LSym *s, Reloc *r)
 {
 	addaddrplus(ctxt, rela, s, r->off);
diff --git a/src/cmd/8l/asm.c b/src/cmd/8l/asm.c
index 98c0424037..8b91c0971a 100644
--- a/src/cmd/8l/asm.c
+++ b/src/cmd/8l/asm.c
@@ -70,6 +70,11 @@ static void	addpltsym(Link*, LSym*);
 static void	addgotsym(Link*, LSym*);
 
 void
+gentext(void)
+{
+}
+
+void
 adddynrela(LSym *rela, LSym *s, Reloc *r)
 {
 	USED(rela);
diff --git a/src/cmd/9l/asm.c b/src/cmd/9l/asm.c
index f9e2810ade..7814edd525 100644
--- a/src/cmd/9l/asm.c
+++ b/src/cmd/9l/asm.c
@@ -66,6 +66,11 @@ needlib(char *name)
 int	nelfsym = 1;
 
 void
+gentext(void)
+{
+}
+
+void
 adddynrela(LSym *rel, LSym *s, Reloc *r)
 {
 	// TODO(minux)
diff --git a/src/cmd/ld/lib.h b/src/cmd/ld/lib.h
index 067ffa0bcc..17483e0b4c 100644
--- a/src/cmd/ld/lib.h
+++ b/src/cmd/ld/lib.h
@@ -227,6 +227,7 @@ vlong	entryvalue(void);
 void	errorexit(void);
 void	follow(void);
 void	genasmsym(void (*put)(LSym*, char*, int, vlong, vlong, int, LSym*));
+void	gentext(void);
 void	growdatsize(vlong *datsizep, LSym *s);
 char*	headstr(int v);
 int	headtype(char *name);
diff --git a/src/cmd/ld/pobj.c b/src/cmd/ld/pobj.c
index 63460df30a..b86ddfe0fe 100644
--- a/src/cmd/ld/pobj.c
+++ b/src/cmd/ld/pobj.c
@@ -184,6 +184,7 @@ main(int argc, char *argv[])
 	if(HEADTYPE == Hwindows)
 		dope();
 	addexport();
+	gentext();		// trampolines, call stubs, etc.
 	textaddress();
 	pclntab();
 	symtab();