all: final merge of NaCl tree

This CL replays the following one CL from the rsc-go13nacl repo.
This is the last replay CL: after this CL the main repo will have
everything the rsc-go13nacl repo did. Changes made to the main
repo after the rsc-go13nacl repo branched off probably mean that
NaCl doesn't actually work after this CL, but all the code is now moved
over and just needs to be redebugged.

---
cmd/6l, cmd/8l, cmd/ld: support for Native Client

See golang.org/s/go13nacl for design overview.

This CL is publicly visible but not CC'ed to golang-dev,
to avoid distracting from the preparation of the Go 1.2
release.

This CL and the others will be checked into my rsc-go13nacl
clone repo for now, and I will send CLs against the main
repo early in the Go 1.3 development.

R?khr
https://codereview.appspot.com/15750044
---

LGTM=bradfitz, dave, iant
R=dave, bradfitz, iant
CC=golang-codereviews
https://codereview.appspot.com/69040044

3 files changed, 20 insertions, 0 deletions

diff --git a/src/cmd/8l/asm.c b/src/cmd/8l/asm.c
index 03f9e95c9..cc4ec564b 100644
--- a/src/cmd/8l/asm.c
+++ b/src/cmd/8l/asm.c
@@ -696,6 +696,7 @@ asmb(void)
 	case Hnetbsd:
 	case Hopenbsd:
 	case Hdragonfly:
+	case Hnacl:
 		asmbelf(symo);
 		break;
 	case Hwindows:
diff --git a/src/cmd/8l/l.h b/src/cmd/8l/l.h
index f19c570c8..c9695ade0 100644
--- a/src/cmd/8l/l.h
+++ b/src/cmd/8l/l.h
@@ -43,6 +43,7 @@ enum
 	thechar = '8',
 	PtrSize = 4,
 	IntSize = 4,
+	RegSize = 4,
 	MaxAlign = 32,	// max data alignment
 	FuncAlign = 16
 };
diff --git a/src/cmd/8l/obj.c b/src/cmd/8l/obj.c
index 8acb5cab1..ddbd96aa0 100644
--- a/src/cmd/8l/obj.c
+++ b/src/cmd/8l/obj.c
@@ -42,6 +42,11 @@ char*	thestring 	= "386";
 LinkArch*	thelinkarch = &link386;
 
 void
+linkarchinit(void)
+{
+}
+
+void
 archinit(void)
 {
 	// getgoextlinkenabled is based on GO_EXTLINK_ENABLED when
@@ -104,6 +109,19 @@ archinit(void)
 		if(INITRND == -1)
 			INITRND = 4096;
 		break;
+	
+	case Hnacl:
+		elfinit();
+		HEADR = 0x10000;
+		funcalign = 32;
+		if(INITTEXT == -1)
+			INITTEXT = 0x20000;
+		if(INITDAT == -1)
+			INITDAT = 0;
+		if(INITRND == -1)
+			INITRND = 0x10000;
+		break;
+	
 	case Hwindows: /* PE executable */
 		peinit();
 		HEADR = PEFILEHEADR;