4 files changed, 139 insertions, 2 deletions
diff --git a/gas/config/obj-elf.c b/gas/config/obj-elf.c
index d0fbcfb..6450328 100644
--- a/gas/config/obj-elf.c
+++ b/gas/config/obj-elf.c
@@ -72,6 +72,7 @@ static void obj_elf_visibility (int);
 static void obj_elf_symver (int);
 static void obj_elf_subsection (int);
 static void obj_elf_popsection (int);
+static void obj_elf_gnu_attribute (int);
 static void obj_elf_tls_common (int);
 static void obj_elf_lcomm (int);
 static void obj_elf_struct (int);
@@ -113,6 +114,9 @@ static const pseudo_typeS elf_pseudo_table[] =
   {"vtable_inherit", (void (*) (int)) &obj_elf_vtable_inherit, 0},
   {"vtable_entry", (void (*) (int)) &obj_elf_vtable_entry, 0},
 
+  /* A GNU extension for object attributes.  */
+  {"gnu_attribute", obj_elf_gnu_attribute, 0},
+
   /* These are used for dwarf.  */
   {"2byte", cons, 2},
   {"4byte", cons, 4},
@@ -1437,6 +1441,138 @@ obj_elf_vtable_entry (int ignore ATTRIBUTE_UNUSED)
 		  BFD_RELOC_VTABLE_ENTRY);
 }
 
+#define skip_whitespace(str)  do { if (*(str) == ' ') ++(str); } while (0)
+
+static inline int
+skip_past_char (char ** str, char c)
+{
+  if (**str == c)
+    {
+      (*str)++;
+      return 0;
+    }
+  else
+    return -1;
+}
+#define skip_past_comma(str) skip_past_char (str, ',')
+
+/* Parse an attribute directive for VENDOR.
+   Returns the attribute number read, or zero on error.  */
+
+int
+obj_elf_vendor_attribute (int vendor)
+{
+  expressionS exp;
+  int type;
+  int tag;
+  unsigned int i = 0;
+  char *s = NULL;
+
+  /* Read the first number or name.  */
+  skip_whitespace (input_line_pointer);
+  s = input_line_pointer;
+  if (ISDIGIT (*input_line_pointer))
+    {
+      expression (& exp);
+      if (exp.X_op != O_constant)
+	goto bad;
+      tag = exp.X_add_number;
+    }
+  else
+    {
+      char *name;
+
+      /* A name may contain '_', but no other punctuation.  */
+      for (; ISALNUM (*input_line_pointer) || *input_line_pointer == '_';
+	   ++input_line_pointer)
+	i++;
+      if (i == 0)
+	goto bad;
+
+      name = (char *) alloca (i + 1);
+      memcpy (name, s, i);
+      name[i] = '\0';
+
+#ifndef CONVERT_SYMBOLIC_ATTRIBUTE
+#define CONVERT_SYMBOLIC_ATTRIBUTE(a) -1
+#endif
+
+      tag = CONVERT_SYMBOLIC_ATTRIBUTE (name);
+      if (tag == -1)
+	{
+	  as_bad (_("Attribute name not recognised: %s"), name);
+	  ignore_rest_of_line ();
+	  return 0;
+	}
+    }
+
+  type = _bfd_elf_obj_attrs_arg_type (stdoutput, vendor, tag);
+
+  if (skip_past_comma (&input_line_pointer) == -1)
+    goto bad;
+  if (type & 1)
+    {
+      expression (& exp);
+      if (exp.X_op != O_constant)
+	{
+	  as_bad (_("expected numeric constant"));
+	  ignore_rest_of_line ();
+	  return 0;
+	}
+      i = exp.X_add_number;
+    }
+  if ((type & 3) == 3
+      && skip_past_comma (&input_line_pointer) == -1)
+    {
+      as_bad (_("expected comma"));
+      ignore_rest_of_line ();
+      return 0;
+    }
+  if (type & 2)
+    {
+      int len;
+
+      skip_whitespace (input_line_pointer);
+      if (*input_line_pointer != '"')
+	goto bad_string;
+      s = demand_copy_C_string (&len);
+    }
+
+  switch (type & 3)
+    {
+    case 3:
+      bfd_elf_add_obj_attr_int_string (stdoutput, vendor, tag, i, s);
+      break;
+    case 2:
+      bfd_elf_add_obj_attr_string (stdoutput, vendor, tag, s);
+      break;
+    case 1:
+      bfd_elf_add_obj_attr_int (stdoutput, vendor, tag, i);
+      break;
+    default:
+      abort ();
+    }
+
+  demand_empty_rest_of_line ();
+  return tag;
+bad_string:
+  as_bad (_("bad string constant"));
+  ignore_rest_of_line ();
+  return 0;
+bad:
+  as_bad (_("expected <tag> , <value>"));
+  ignore_rest_of_line ();
+  return 0;
+}
+
+/* Parse a .gnu_attribute directive.  */
+
+static void
+obj_elf_gnu_attribute (int ignored ATTRIBUTE_UNUSED)
+{
+  obj_elf_vendor_attribute (OBJ_ATTR_GNU);
+}
+
 void
 elf_obj_read_begin_hook (void)
 {
diff --git a/gas/config/obj-elf.h b/gas/config/obj-elf.h
index 0721654..d4fd4d5 100644
--- a/gas/config/obj-elf.h
+++ b/gas/config/obj-elf.h
@@ -167,6 +167,7 @@ extern void obj_elf_change_section
   (const char *, int, bfd_vma, int, const char *, int, int);
 extern struct fix *obj_elf_vtable_inherit (int);
 extern struct fix *obj_elf_vtable_entry (int);
+extern int obj_elf_vendor_attribute (int);
 
 /* BFD wants to write the udata field, which is a no-no for the
    predefined section symbols in bfd/section.c.  They are read-only.  */
diff --git a/gas/config/tc-arm.c b/gas/config/tc-arm.c
index 1ce5459..971ac6f 100644
--- a/gas/config/tc-arm.c
+++ b/gas/config/tc-arm.c
@@ -4336,7 +4336,7 @@ s_arm_unwind_raw (int ignored ATTRIBUTE_UNUSED)
 static void
 s_arm_eabi_attribute (int ignored ATTRIBUTE_UNUSED)
 {
-  int tag = s_vendor_attribute (OBJ_ATTR_PROC);
+  int tag = obj_elf_vendor_attribute (OBJ_ATTR_PROC);
 
   if (tag < NUM_KNOWN_OBJ_ATTRIBUTES)
     attributes_set_explicitly[tag] = 1;
diff --git a/gas/config/tc-tic6x.c b/gas/config/tc-tic6x.c
index ddbfb50..65517a6 100644
--- a/gas/config/tc-tic6x.c
+++ b/gas/config/tc-tic6x.c
@@ -693,7 +693,7 @@ static bfd_boolean tic6x_attributes_set_explicitly[NUM_KNOWN_OBJ_ATTRIBUTES];
 static void
 s_tic6x_c6xabi_attribute (int ignored ATTRIBUTE_UNUSED)
 {
-  int tag = s_vendor_attribute (OBJ_ATTR_PROC);
+  int tag = obj_elf_vendor_attribute (OBJ_ATTR_PROC);
 
   if (tag < NUM_KNOWN_OBJ_ATTRIBUTES)
     tic6x_attributes_set_explicitly[tag] = TRUE;