+#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, ',')
+
+/* A list of attributes that have been explicitly set by the assembly code.
+ VENDOR is the vendor id, BASE is the tag shifted right by the number
+ of bits in MASK, and bit N of MASK is set if tag BASE+N has been set. */
+struct recorded_attribute_info {
+ struct recorded_attribute_info *next;
+ int vendor;
+ unsigned int base;
+ unsigned long mask;
+};
+static struct recorded_attribute_info *recorded_attributes;
+
+/* Record that we have seen an explicit specification of attribute TAG
+ for vendor VENDOR. */
+
+static void
+record_attribute (int vendor, unsigned int tag)
+{
+ unsigned int base;
+ unsigned long mask;
+ struct recorded_attribute_info *rai;
+
+ base = tag / (8 * sizeof (rai->mask));
+ mask = 1UL << (tag % (8 * sizeof (rai->mask)));
+ for (rai = recorded_attributes; rai; rai = rai->next)
+ if (rai->vendor == vendor && rai->base == base)
+ {
+ rai->mask |= mask;
+ return;
+ }
+
+ rai = XNEW (struct recorded_attribute_info);
+ rai->next = recorded_attributes;
+ rai->vendor = vendor;
+ rai->base = base;
+ rai->mask = mask;
+ recorded_attributes = rai;
+}
+
+/* Return true if we have seen an explicit specification of attribute TAG
+ for vendor VENDOR. */
+
+bfd_boolean
+obj_elf_seen_attribute (int vendor, unsigned int tag)
+{
+ unsigned int base;
+ unsigned long mask;
+ struct recorded_attribute_info *rai;
+
+ base = tag / (8 * sizeof (rai->mask));
+ mask = 1UL << (tag % (8 * sizeof (rai->mask)));
+ for (rai = recorded_attributes; rai; rai = rai->next)
+ if (rai->vendor == vendor && rai->base == base)
+ return (rai->mask & mask) != 0;
+ return FALSE;
+}
+
+/* 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 = xstrndup (s, i);
+
+#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 ();
+ free (name);
+ return 0;
+ }
+ free (name);
+ }
+
+ 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);
+ }
+
+ record_attribute (vendor, tag);
+ 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);
+}
+
projects / deliverable / binutils-gdb.git / blobdiff