# HG changeset patch
# User lost
# Date 1231626269 0
# Node ID 03be43ae19cfee342bab2f6cefe8ced7a32fd543
# Parent  b6b1e79cc2778f4c0f6f14d0e69f2b6236abbcfd
Added EXTERN directive

diff -r b6b1e79cc277 -r 03be43ae19cf src/instab.c
--- a/src/instab.c	Sat Jan 10 19:05:15 2009 +0000
+++ b/src/instab.c	Sat Jan 10 22:24:29 2009 +0000
@@ -75,7 +75,8 @@
 extern OPFUNC(pseudo_endsection);
 extern OPFUNC(pseudo_pragma);
 extern OPFUNC(pseudo_starpragma);
-
+extern OPFUNC(pseudo_extern);
+\
 instab_t instab[] =
 {
 	{ "abx",	{	0x3a,	-0x1,	-0x1,	-0x1	},	insn_inh },
@@ -322,6 +323,9 @@
 
 	{ "equ",	{ -1, -1, -1, -1 },	pseudo_equ,	0,	0,	1 },
 	{ "=",		{ -1, -1, -1, -1 },	pseudo_equ,	0,	0,	1 },
+	{ "extern",	{ -1, -1, -1, -1 },	pseudo_extern,	0,	0,	1 },
+	{ "external",	{ -1, -1, -1, -1 },	pseudo_extern,	0,	0,	1 },
+
 
 	{ "rmb", 	{ -1, -1, -1, -1 }, pseudo_rmb },
 	{ "rmd", 	{ -1, -1, -1, -1 }, pseudo_rmd },
diff -r b6b1e79cc277 -r 03be43ae19cf src/lwasm.h
--- a/src/lwasm.h	Sat Jan 10 19:05:15 2009 +0000
+++ b/src/lwasm.h	Sat Jan 10 22:24:29 2009 +0000
@@ -98,6 +98,7 @@
 #define SYMBOL_COMPLEX	2	// register symbol as a complex symbol (from l -> expr)
 #define SYMBOL_FORCE	4	// force resetting the symbol value if it already exists on pass 2
 #define SYMBOL_NORM		0	// no flags
+#define SYMBOL_EXTERN	8	// the symbol is an external reference
 typedef struct lwasm_symbol_ent_s lwasm_symbol_ent_t;
 struct lwasm_symbol_ent_s
 {
@@ -105,6 +106,7 @@
 	int context;				// the context number of the symbol (-1 for global)
 	int value;					// the value of the symbol
 	int flags;					// flags for the symbol
+	char *externalname;			// for external references that are aliased locally
 	sectiontab_t *sect;			// the section the symbol exists in; NULL for none
 	lwasm_expr_stack_t *expr;	// expression for a symbol that is not constant NULL for const
 	lwasm_symbol_ent_t *next;	// next symbol in the table
diff -r b6b1e79cc277 -r 03be43ae19cf src/pseudo.c
--- a/src/pseudo.c	Sat Jan 10 19:05:15 2009 +0000
+++ b/src/pseudo.c	Sat Jan 10 22:24:29 2009 +0000
@@ -761,3 +761,23 @@
 	as -> csect = 0;
 	as -> context = lwasm_next_context(as);
 }
+
+OPFUNC(pseudo_extern)
+{
+	if (as -> passnum != 1)
+		return;
+
+	if (as -> outformat != OUTPUT_OBJ)
+	{
+		register_error(as, l, 1, "External references only supported for obj target");
+		return;
+	}
+	
+	if (as -> csect)
+	{
+		register_error(as, l, 1, "Cannot declare external symbols within a section");
+		return;
+	}
+	
+	lwasm_register_symbol(as, l, l -> sym, 0, SYMBOL_EXTERN);
+}
diff -r b6b1e79cc277 -r 03be43ae19cf src/symbol.c
--- a/src/symbol.c	Sat Jan 10 19:05:15 2009 +0000
+++ b/src/symbol.c	Sat Jan 10 22:24:29 2009 +0000
@@ -141,6 +141,7 @@
 	se -> sect = as -> csect;
 	se -> expr = NULL;
 	se -> flags = flags;
+	se -> externalname = NULL;
 
 	return 0;
 }