gas: Use udata for DW_AT_high_pc when emitting DWARF4

For DWARF4 DW_AT_high_pc can be expressed as constant offset from
DW_AT_low_pc which saves a relocation. Use DW_FORM_udate (uleb128)
to keep the constant value as small as possible.

gas/ChangeLog:

       * dwarf2dbg.c (out_debug_abbrev): When DWARF2_VERSION >= 4, use
       DW_FORM_udata for DW_AT_high_pc.
       (out_debug_info): Use emit_leb128_expr for DW_AT_high_pc, when
       DWARF2_VERSION >= 4.
       * read.c (emit_leb128_exp): No longer static.
       * read.h (emit_leb128_exp): Define.

1 files changed, 1 insertions, 1 deletions

diff --git a/gas/read.c b/gas/read.c
index 8f93c2b..f192cc1 100644
--- a/gas/read.c
+++ b/gas/read.c
@@ -5138,7 +5138,7 @@ output_big_leb128 (char *p, LITTLENUM_TYPE *bignum, unsigned int size, int sign)
 /* Generate the appropriate fragments for a given expression to emit a
    leb128 value.  SIGN is 1 for sleb, 0 for uleb.  */
 
-static void
+void
 emit_leb128_expr (expressionS *exp, int sign)
 {
   operatorT op = exp->X_op;