[RFA] Stabs: Ignore N_BNSYM/N_ENSYM entry types

Trying to debug gdb with itself,
I stumbled on the following complaints
Unknown symbol type 0x2e
or
Unknown symbol type 0x4e

It appears that those corrspond to N_BNSYM and N_ENSYM,
which are MacOS extensions of stabs debugging format.
But these extensions have been used inside gcc probalby
for a while already, see:
https://gcc.gnu.org/ml/gcc/2004-08/msg00157.html

As the only purpose of these entries is to allow for removal
of stabs information if the function is removed,
it can be safely ignored by GDB.

This patch simply adds those two entry types to the list
of ignored entry type in read_dbx_symtab function.

Is this OK?

Pierre Muller

2014-10-03  Pierre Muller  <muller@sourceware.org>

	* dbxread.c (read_dbx_symtab): Also ignore N_BNSYM/N_ENSYM.

diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 748d61dc5db797780c2809b3d0697572efd864c4..748efe9f2a2dd5a298bbc461a583b93715b3f0e5 100644 (file)
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,7 @@
+2014-10-03  Pierre Muller  <muller@sourceware.org>
+
+       * dbxread.c (read_dbx_symtab): Also ignore N_BNSYM/N_ENSYM.
+
 2014-10-02  Pedro Alves  <palves@redhat.com>
 
        * breakpoint.c (breakpoints_should_be_inserted_now): Use

diff --git a/gdb/dbxread.c b/gdb/dbxread.c
index fd7910c86e03513b5bd014be66d6eba487cfea95..2c3be20bd5ff67f1244a6460f05194ff040eaf62 100644 (file)
--- a/gdb/dbxread.c
+++ b/gdb/dbxread.c
@@ -2120,6 +2120,8 @@ read_dbx_symtab (struct objfile *objfile)
        case N_SLINE:
        case N_RSYM:
        case N_PSYM:
+       case N_BNSYM:
+       case N_ENSYM:
        case N_LBRAC:
        case N_NSYMS:           /* Ultrix 4.0: symbol count */
        case N_DEFD:            /* GNU Modula-2 */