gas/

2005-05-06  Jan Beulich  <jbeulich@novell.com>

	* macro.c (new_formal, del_formal): New.
	(do_formals): Use new_formal. Check for and parse qualifier. Warn if
	required argument has default value. Stop looking for more formal
	when there was a vararg one.
	(macro_expand_body): Use new_formal and del_formal.
	(macro_expand): Likewise. Initialize local variable err. Don't
	return immediately when encountering an error. Warn when keyword
	argument already had a value assigned. Eliminate duplicate clearing
	of argument value. When current positional argument matches parameter
	of vararg type, assign to it all the remaining arguments. Issue error
	when required parameter does not have value.
	(free_macro): Use del_formal.
	(expand_irp): Initialize formal type. Free buffers associated with
	formal prior to returning.
	* macro.h (struct formal_struct): Add new field 'type' with new
	enumeration type 'formal_type'.
	* doc/as.texinfo: Document macro parameter qualifiers.
	* NEWS: Mention new functionality.

gas/testsuite/
2005-05-06  Jan Beulich  <jbeulich@novell.com>

	* gas/macros/badarg.s: Add check for bad qualifier specification.
	* gas/macros/badarg.l: Adjust.
	* gas/macros/vararg.[sd]: New.
	* gas/macros/macros.exp: Run new test.

11 files changed, 235 insertions, 71 deletions

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 6da2330e69d..e4cfd386646 100644
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,5 +1,26 @@
 2005-05-06  Jan Beulich  <jbeulich@novell.com>
 
+	* macro.c (new_formal, del_formal): New.
+	(do_formals): Use new_formal. Check for and parse qualifier. Warn if
+	required argument has default value. Stop looking for more formal
+	when there was a vararg one.
+	(macro_expand_body): Use new_formal and del_formal.
+	(macro_expand): Likewise. Initialize local variable err. Don't
+	return immediately when encountering an error. Warn when keyword
+	argument already had a value assigned. Eliminate duplicate clearing
+	of argument value. When current positional argument matches parameter
+	of vararg type, assign to it all the remaining arguments. Issue error
+	when required parameter does not have value.
+	(free_macro): Use del_formal.
+	(expand_irp): Initialize formal type. Free buffers associated with
+	formal prior to returning.
+	* macro.h (struct formal_struct): Add new field 'type' with new
+	enumeration type 'formal_type'.
+	* doc/as.texinfo: Document macro parameter qualifiers.
+	* NEWS: Mention new functionality.
+
+2005-05-06  Jan Beulich  <jbeulich@novell.com>
+
 	* cond.c (s_ifb): New.
 	* read.c (potable): Add s_ifb as handler for .ifb and .ifnb.
 	* read.h (s_ifb): Prototype.
diff --git a/gas/NEWS b/gas/NEWS
index a95311f2678..4b70aca1655 100644
--- a/gas/NEWS
+++ b/gas/NEWS
@@ -1,5 +1,8 @@
 -*- text -*-
 
+* Macros with a variable number of arguments are now supported. See the
+  documentation for how this works.
+
 * Added --reduce-memory-overheads switch to reduce the size of the hash
   tables used, at the expense of longer assembly times, and
   --hash-size=<NUMBER> to set the size of the hash tables used by gas.
diff --git a/gas/doc/as.texinfo b/gas/doc/as.texinfo
index 8186aba3887..4db81f64b56 100644
--- a/gas/doc/as.texinfo
+++ b/gas/doc/as.texinfo
@@ -4866,7 +4866,10 @@ With that definition, @samp{SUM 0,5} is equivalent to this assembly input:
 @cindex @code{macro} directive
 Begin the definition of a macro called @var{macname}.  If your macro
 definition requires arguments, specify their names after the macro name,
-separated by commas or spaces.  You can supply a default value for any
+separated by commas or spaces.  You can qualify the macro argument to
+indicate whether all invocations must specify a non-blank value (through
+@samp{:@code{req}}), or whether it takes all of the remaining arguments
+(through @samp{:@code{vararg}}).  You can supply a default value for any
 macro argument by following the name with @samp{=@var{deflt}}.  You
 cannot define two macros with the same @var{macname} unless it has been
 subject to the @code{.purgem} directive (@xref{Purgem}.) between the two
@@ -4893,6 +4896,12 @@ After the definition is complete, you can call the macro either as
 @samp{0}, and @samp{\p2} evaluating to @var{b}).
 @end table
 
+@item .macro m p1:req, p2=0, p3:vararg
+Begin the definition of a macro called @code{m}, with at least three
+arguments.  The first argument must always have a value specified, but
+not the second, which instead has a default value. The third formal
+will get assigned all remaining arguments specified at invocation time.
+
 When you call a macro, you can specify the argument values either by
 position, or by keyword.  For example, @samp{sum 9,17} is equivalent to
 @samp{sum to=17, from=9}.
diff --git a/gas/macro.c b/gas/macro.c
index be73b98d9b9..76e3664b22e 100644
--- a/gas/macro.c
+++ b/gas/macro.c
@@ -71,6 +71,8 @@ extern void *alloca ();
 static int get_token (int, sb *, sb *);
 static int getstring (int, sb *, sb *);
 static int get_any_string (int, sb *, sb *, int, int);
+static formal_entry *new_formal (void);
+static void del_formal (formal_entry *);
 static int do_formals (macro_entry *, int, sb *);
 static int get_apost_token (int, sb *, sb *, int);
 static int sub_actual (int, sb *, sb *, struct hash_control *, int, sb *, int);
@@ -465,6 +467,34 @@ get_any_string (int idx, sb *in, sb *out, int expand, int pretend_quoted)
   return idx;
 }
 
+/* Allocate a new formal.  */
+
+static formal_entry *
+new_formal (void)
+{
+  formal_entry *formal;
+
+  formal = xmalloc (sizeof (formal_entry));
+
+  sb_new (&formal->name);
+  sb_new (&formal->def);
+  sb_new (&formal->actual);
+  formal->next = NULL;
+  formal->type = FORMAL_OPTIONAL;
+  return formal;
+}
+
+/* Free a formal.  */
+
+static void
+del_formal (formal_entry *formal)
+{
+  sb_kill (&formal->actual);
+  sb_kill (&formal->def);
+  sb_kill (&formal->name);
+  free (formal);
+}
+
 /* Pick up the formal parameters of a macro definition.  */
 
 static int
@@ -476,15 +506,9 @@ do_formals (macro_entry *macro, int idx, sb *in)
   idx = sb_skip_white (idx, in);
   while (idx < in->len)
     {
-      formal_entry *formal;
+      formal_entry *formal = new_formal ();
       int cidx;
 
-      formal = (formal_entry *) xmalloc (sizeof (formal_entry));
-
-      sb_new (&formal->name);
-      sb_new (&formal->def);
-      sb_new (&formal->actual);
-
       idx = get_token (idx, in, &formal->name);
       if (formal->name.len == 0)
 	{
@@ -494,15 +518,57 @@ do_formals (macro_entry *macro, int idx, sb *in)
 	}
       idx = sb_skip_white (idx, in);
       /* This is a formal.  */
+      name = sb_terminate (&formal->name);
+      if (! macro_mri
+	  && idx < in->len
+	  && in->ptr[idx] == ':'
+	  && (! is_name_beginner (':')
+	      || idx + 1 >= in->len
+	      || ! is_part_of_name (in->ptr[idx + 1])))
+	{
+	  /* Got a qualifier.  */
+	  sb qual;
+
+	  sb_new (&qual);
+	  idx = get_token (sb_skip_white (idx + 1, in), in, &qual);
+	  sb_terminate (&qual);
+	  if (qual.len == 0)
+	    as_bad_where (macro->file,
+			  macro->line,
+			  _("Missing parameter qualifier for `%s' in macro `%s'"),
+			  name,
+			  macro->name);
+	  else if (strcmp (qual.ptr, "req") == 0)
+	    formal->type = FORMAL_REQUIRED;
+	  else if (strcmp (qual.ptr, "vararg") == 0)
+	    formal->type = FORMAL_VARARG;
+	  else
+	    as_bad_where (macro->file,
+			  macro->line,
+			  _("`%s' is not a valid parameter qualifier for `%s' in macro `%s'"),
+			  qual.ptr,
+			  name,
+			  macro->name);
+	  sb_kill (&qual);
+	  idx = sb_skip_white (idx, in);
+	}
       if (idx < in->len && in->ptr[idx] == '=')
 	{
 	  /* Got a default.  */
 	  idx = get_any_string (idx + 1, in, &formal->def, 1, 0);
 	  idx = sb_skip_white (idx, in);
+	  if (formal->type == FORMAL_REQUIRED)
+	    {
+	      sb_reset (&formal->def);
+	      as_warn_where (macro->file,
+			    macro->line,
+			    _("Pointless default value for required parameter `%s' in macro `%s'"),
+			    name,
+			    macro->name);
+	    }
 	}
 
       /* Add to macro's hash table.  */
-      name = sb_terminate (&formal->name);
       if (! hash_find (macro->formal_hash, name))
 	hash_jam (macro->formal_hash, name, formal);
       else
@@ -513,6 +579,10 @@ do_formals (macro_entry *macro, int idx, sb *in)
 		      macro->name);
 
       formal->index = macro->formal_count++;
+      *p = formal;
+      p = &formal->next;
+      if (formal->type == FORMAL_VARARG)
+	break;
       cidx = idx;
       idx = sb_skip_comma (idx, in);
       if (idx != cidx && idx >= in->len)
@@ -520,23 +590,14 @@ do_formals (macro_entry *macro, int idx, sb *in)
 	  idx = cidx;
 	  break;
 	}
-      *p = formal;
-      p = &formal->next;
-      *p = NULL;
     }
 
   if (macro_mri)
     {
-      formal_entry *formal;
+      formal_entry *formal = new_formal ();
 
       /* Add a special NARG formal, which macro_expand will set to the
          number of arguments.  */
-      formal = (formal_entry *) xmalloc (sizeof (formal_entry));
-
-      sb_new (&formal->name);
-      sb_new (&formal->def);
-      sb_new (&formal->actual);
-
       /* The same MRI assemblers which treat '@' characters also use
          the name $NARG.  At least until we find an exception.  */
       if (macro_strip_at)
@@ -557,7 +618,6 @@ do_formals (macro_entry *macro, int idx, sb *in)
 
       formal->index = NARG_INDEX;
       *p = formal;
-      formal->next = NULL;
     }
 
   return idx;
@@ -827,10 +887,8 @@ macro_expand_body (sb *in, sb *out, formal_entry *formals,
 	      while (in->ptr[src] != '\n')
 		{
 		  const char *name;
-		  formal_entry *f;
+		  formal_entry *f = new_formal ();
 
-		  f = (formal_entry *) xmalloc (sizeof (formal_entry));
-		  sb_new (&f->name);
 		  src = get_token (src, in, &f->name);
 		  name = sb_terminate (&f->name);
 		  if (! hash_find (formal_hash, name))
@@ -838,8 +896,6 @@ macro_expand_body (sb *in, sb *out, formal_entry *formals,
 		      static int loccnt;
 		      char buf[20];
 
-		      sb_new (&f->def);
-		      sb_new (&f->actual);
 		      f->index = LOCAL_INDEX;
 		      f->next = loclist;
 		      loclist = f;
@@ -857,8 +913,7 @@ macro_expand_body (sb *in, sb *out, formal_entry *formals,
 				    macro->line + macro_line,
 				    _("`%s' was already used as parameter (or another local) name"),
 				    name);
-		      sb_kill (&f->name);
-		      free (f);
+		      del_formal (f);
 		    }
 
 		  src = sb_skip_comma (src, in);
@@ -935,10 +990,7 @@ macro_expand_body (sb *in, sb *out, formal_entry *formals,
       /* Setting the value to NULL effectively deletes the entry.  We
          avoid calling hash_delete because it doesn't reclaim memory.  */
       hash_jam (formal_hash, sb_terminate (&loclist->name), NULL);
-      sb_kill (&loclist->name);
-      sb_kill (&loclist->def);
-      sb_kill (&loclist->actual);
-      free (loclist);
+      del_formal (loclist);
       loclist = f;
     }
 
@@ -957,7 +1009,7 @@ macro_expand (int idx, sb *in, macro_entry *m, sb *out)
   int is_positional = 0;
   int is_keyword = 0;
   int narg = 0;
-  const char *err;
+  const char *err = NULL;
 
   sb_new (&t);
 
@@ -981,12 +1033,8 @@ macro_expand (int idx, sb *in, macro_entry *m, sb *out)
 		  && in->ptr[idx] != ' '
 		  && in->ptr[idx] != '\t')
 	    {
-	      formal_entry *n;
+	      formal_entry *n = new_formal ();
 
-	      n = (formal_entry *) xmalloc (sizeof (formal_entry));
-	      sb_new (&n->name);
-	      sb_new (&n->def);
-	      sb_new (&n->actual);
 	      n->index = QUAL_INDEX;
 
 	      n->next = m->formals;
@@ -1021,16 +1069,27 @@ macro_expand (int idx, sb *in, macro_entry *m, sb *out)
 	  sb_reset (&t);
 	  idx = get_token (idx, in, &t);
 	  if (in->ptr[idx] != '=')
-	    return _("confusion in formal parameters");
+	    {
+	      err = _("confusion in formal parameters");
+	      break;
+	    }
 
 	  /* Lookup the formal in the macro's list.  */
 	  ptr = (formal_entry *) hash_find (m->formal_hash, sb_terminate (&t));
 	  if (!ptr)
-	    return _("macro formal argument does not exist");
+	    as_bad (_("Parameter named `%s' does not exist for macro `%s'"),
+		    t.ptr,
+		    m->name);
 	  else
 	    {
 	      /* Insert this value into the right place.  */
-	      sb_reset (&ptr->actual);
+	      if (ptr->actual.len)
+		{
+		  as_warn (_("Value for parameter `%s' of macro `%s' was already specified"),
+			   ptr->name.ptr,
+			   m->name);
+		  sb_reset (&ptr->actual);
+		}
 	      idx = get_any_string (idx + 1, in, &ptr->actual, 0, 0);
 	      if (ptr->actual.len > 0)
 		++narg;
@@ -1041,7 +1100,10 @@ macro_expand (int idx, sb *in, macro_entry *m, sb *out)
 	  /* This is a positional arg.  */
 	  is_positional = 1;
 	  if (is_keyword)
-	    return _("can't mix positional and keyword arguments");
+	    {
+	      err = _("can't mix positional and keyword arguments");
+	      break;
+	    }
 
 	  if (!f)
 	    {
@@ -1049,13 +1111,12 @@ macro_expand (int idx, sb *in, macro_entry *m, sb *out)
 	      int c;
 
 	      if (!macro_mri)
-		return _("too many positional arguments");
+		{
+		  err = _("too many positional arguments");
+		  break;
+		}
 
-	      f = (formal_entry *) xmalloc (sizeof (formal_entry));
-	      sb_new (&f->name);
-	      sb_new (&f->def);
-	      sb_new (&f->actual);
-	      f->next = NULL;
+	      f = new_formal ();
 
 	      c = -1;
 	      for (pf = &m->formals; *pf != NULL; pf = &(*pf)->next)
@@ -1067,8 +1128,13 @@ macro_expand (int idx, sb *in, macro_entry *m, sb *out)
 	      f->index = c;
 	    }
 
-	  sb_reset (&f->actual);
-	  idx = get_any_string (idx, in, &f->actual, 1, 0);
+	  if (f->type != FORMAL_VARARG)
+	    idx = get_any_string (idx, in, &f->actual, 1, 0);
+	  else
+	    {
+	      sb_add_buffer (&f->actual, in->ptr + idx, in->len - idx);
+	      idx = in->len;
+	    }
 	  if (f->actual.len > 0)
 	    ++narg;
 	  do
@@ -1089,19 +1155,29 @@ macro_expand (int idx, sb *in, macro_entry *m, sb *out)
 	}
     }
 
-  if (macro_mri)
+  if (! err)
     {
-      char buffer[20];
-
-      sb_reset (&t);
-      sb_add_string (&t, macro_strip_at ? "$NARG" : "NARG");
-      ptr = (formal_entry *) hash_find (m->formal_hash, sb_terminate (&t));
-      sb_reset (&ptr->actual);
-      sprintf (buffer, "%d", narg);
-      sb_add_string (&ptr->actual, buffer);
-    }
+      for (ptr = m->formals; ptr; ptr = ptr->next)
+	{
+	  if (ptr->type == FORMAL_REQUIRED && ptr->actual.len == 0)
+	    as_bad (_("Missing value for required parameter `%s' of macro `%s'"),
+		    ptr->name.ptr,
+		    m->name);
+	}
 
-  err = macro_expand_body (&m->sub, out, m->formals, m->formal_hash, m);
+      if (macro_mri)
+	{
+	  char buffer[20];
+
+	  sb_reset (&t);
+	  sb_add_string (&t, macro_strip_at ? "$NARG" : "NARG");
+	  ptr = (formal_entry *) hash_find (m->formal_hash, sb_terminate (&t));
+	  sprintf (buffer, "%d", narg);
+	  sb_add_string (&ptr->actual, buffer);
+	}
+
+      err = macro_expand_body (&m->sub, out, m->formals, m->formal_hash, m);
+    }
 
   /* Discard any unnamed formal arguments.  */
   if (macro_mri)
@@ -1115,11 +1191,8 @@ macro_expand (int idx, sb *in, macro_entry *m, sb *out)
 	    pf = &(*pf)->next;
 	  else
 	    {
-	      sb_kill (&(*pf)->name);
-	      sb_kill (&(*pf)->def);
-	      sb_kill (&(*pf)->actual);
 	      f = (*pf)->next;
-	      free (*pf);
+	      del_formal (*pf);
 	      *pf = f;
 	    }
 	}
@@ -1191,14 +1264,11 @@ free_macro(macro_entry *macro)
 
   for (formal = macro->formals; formal; )
     {
-      void *ptr;
+      formal_entry *f;
 
-      sb_kill (&formal->name);
-      sb_kill (&formal->def);
-      sb_kill (&formal->actual);
-      ptr = formal;
+      f = formal;
       formal = formal->next;
-      free (ptr);
+      del_formal (f);
     }
   hash_die (macro->formal_hash);
   sb_kill (&macro->sub);
@@ -1263,6 +1333,7 @@ expand_irp (int irpc, int idx, sb *in, sb *out, int (*get_line) (sb *))
 
   f.index = 1;
   f.next = NULL;
+  f.type = FORMAL_OPTIONAL;
 
   sb_reset (out);
 
@@ -1308,6 +1379,9 @@ expand_irp (int irpc, int idx, sb *in, sb *out, int (*get_line) (sb *))
     }
 
   hash_die (h);
+  sb_kill (&f.actual);
+  sb_kill (&f.def);
+  sb_kill (&f.name);
   sb_kill (&sub);
 
   return err;
diff --git a/gas/macro.h b/gas/macro.h
index e6ade7cd804..4fdaa52d097 100644
--- a/gas/macro.h
+++ b/gas/macro.h
@@ -45,6 +45,12 @@ typedef struct formal_struct {
   sb def;			/* The default value.  */
   sb actual;			/* The actual argument (changed on each expansion).  */
   int index;			/* The index of the formal 0..formal_count - 1.  */
+  enum formal_type
+    {
+      FORMAL_OPTIONAL,
+      FORMAL_REQUIRED,
+      FORMAL_VARARG
+    } type;			/* The kind of the formal.  */
 } formal_entry;
 
 /* Other values found in the index field of a formal_entry.  */
diff --git a/gas/testsuite/ChangeLog b/gas/testsuite/ChangeLog
index d7365b44a2c..eceba443c60 100644
--- a/gas/testsuite/ChangeLog
+++ b/gas/testsuite/ChangeLog
@@ -1,5 +1,12 @@
 2005-05-06  Jan Beulich  <jbeulich@novell.com>
 
+	* gas/macros/badarg.s: Add check for bad qualifier specification.
+	* gas/macros/badarg.l: Adjust.
+	* gas/macros/vararg.[sd]: New.
+	* gas/macros/macros.exp: Run new test.
+
+2005-05-06  Jan Beulich  <jbeulich@novell.com>
+
 	* gas/all/cond.s: Also test .ifb/.ifnb.
 	* gas/all/cond.d: Adjust.
 
diff --git a/gas/testsuite/gas/macros/badarg.l b/gas/testsuite/gas/macros/badarg.l
index 602d3cecd47..cbf24299910 100644
--- a/gas/testsuite/gas/macros/badarg.l
+++ b/gas/testsuite/gas/macros/badarg.l
@@ -8,3 +8,8 @@
 .*:19: Error: .*
 .*:25: Error: .*
 .*:30: Error: .*
+.*:38: Error: .*
+.*:41: Error: .*
+.*:44: Warning: .*
+.*:47: Error: .*
+.*:49: Error: .*
diff --git a/gas/testsuite/gas/macros/badarg.s b/gas/testsuite/gas/macros/badarg.s
index 3dec7eadfe0..716a98f1adb 100644
--- a/gas/testsuite/gas/macros/badarg.s
+++ b/gas/testsuite/gas/macros/badarg.s
@@ -32,3 +32,19 @@
 
 	m6
 	m7
+
+	.noaltmacro
+
+	.macro m8, arg :
+	.endm
+
+	.macro m9, arg : qual
+	.endm
+
+	.macro m10, arg : req = def
+	.endm
+
+	m10
+
+	.macro m11, arg1 : vararg, arg2
+	.endm
diff --git a/gas/testsuite/gas/macros/macros.exp b/gas/testsuite/gas/macros/macros.exp
index ed8debe13ff..cd19ff81838 100644
--- a/gas/testsuite/gas/macros/macros.exp
+++ b/gas/testsuite/gas/macros/macros.exp
@@ -27,9 +27,9 @@ if { ![istarget *c54x*-*-*] && ![istarget *c4x*-*-*] } {
     run_dump_test irp
     run_dump_test rept
     run_dump_test repeat
+    run_dump_test vararg
 }
 
-
 gas_test_error "err.s" "" "macro infinite recursion"
 
 # The tic4x-coff target fails the next test because it defines '&'
diff --git a/gas/testsuite/gas/macros/vararg.d b/gas/testsuite/gas/macros/vararg.d
new file mode 100644
index 00000000000..4b943fd18fa
--- /dev/null
+++ b/gas/testsuite/gas/macros/vararg.d
@@ -0,0 +1,13 @@
+#objdump: -r
+#name: macro vararg
+
+.*: +file format .*
+
+RELOCATION RECORDS FOR .*
+OFFSET[ 	]+TYPE[ 	]+VALUE.*
+0+00[ 	]+[a-zA-Z0-9_]+[ 	]+foo1
+0+04[ 	]+[a-zA-Z0-9_]+[ 	]+foo2
+0+08[ 	]+[a-zA-Z0-9_]+[ 	]+foo3
+0+0c[ 	]+[a-zA-Z0-9_]+[ 	]+foo4
+0+10[ 	]+[a-zA-Z0-9_]+[ 	]+foo5
+0+14[ 	]+[a-zA-Z0-9_]+[ 	]+foo6
diff --git a/gas/testsuite/gas/macros/vararg.s b/gas/testsuite/gas/macros/vararg.s
new file mode 100644
index 00000000000..4bdf99a263b
--- /dev/null
+++ b/gas/testsuite/gas/macros/vararg.s
@@ -0,0 +1,10 @@
+	.macro	v1 arg1 : req, args : vararg
+	.long	foo\arg1
+	.ifnb	\args
+	v1	\args
+	.endif
+	.endm
+
+	v1	1
+	v1	2, 3
+	v1	4, 5, 6