* as.c (parse_args): Add option -gdwarf2 to allow requesting

        DWARF2 debug info (line information only, at this point).
        * as.h: Update comment about supported debug formats.
        * dwarf2dbg.c, dwarf2dbg.h: New files.
        * Makefile.am (GAS_CFILES, HFILES, GENERIC_OBJS): Add them.

1 files changed, 48 insertions, 0 deletions

diff --git a/gas/dwarf2dbg.h b/gas/dwarf2dbg.h
new file mode 100644
index 0000000..dda8ab2
--- /dev/null
+++ b/gas/dwarf2dbg.h
@@ -0,0 +1,48 @@
+#ifndef AS_DWARF2DBG_H
+#define AS_DWARF2DBG_H
+
+#include "as.h"
+
+#define DWARF2_FLAG_BEGIN_STMT	(1 << 0)	/* beginning of statement */
+#define DWARF2_FLAG_BEGIN_BLOCK	(1 << 1)	/* beginning of basic block */
+
+struct dwarf2_line_info
+  {
+    char *filename;
+    unsigned int filenum;
+    unsigned int line;
+    unsigned int column;
+    unsigned int flags;
+  };
+
+/* Implements the .file FILENO "FILENAME" directive.  FILENO can be 0
+   to indicate that no file number has been assigned.  All real file
+   number must be >0.  */
+extern void dwarf2_directive_file (int dummy);
+
+/* Implements the .loc FILENO LINENO [COLUMN] directive.  FILENO is
+   the file number, LINENO the line number and the (optional) COLUMN
+   the column of the source code that the following instruction
+   corresponds to.  FILENO can be 0 to indicate that the filename
+   specified by the textually most recent .file directive should be
+   used.  */
+extern void dwarf2_directive_loc (int dummy);
+
+/* Returns the current source information.  If .file directives have
+   been encountered, the info for the corresponding source file is
+   returned.  Otherwise, the info for the assembly source file is
+   returned.  */
+extern void dwarf2_where (struct dwarf2_line_info *l);
+
+/* This function generates .debug_line info based on the address and
+   source information passed in the arguments.  ADDR should be the
+   frag-relative offset of the instruction the information is for and
+   L is the source information that should be associated with that
+   address. */
+extern void dwarf2_gen_line_info (bfd_vma addr, struct dwarf2_line_info *l);
+
+/* Must be called after all other input is processed to finish up the
+   .debug_line section.  */
+extern void dwarf2_finish (void);
+
+#endif /* AS_DWARF2DBG_H */