* m68k-dis.c (print_insn_m68k): Restore info->fprintf_func and

	info->print_address_func if longjmp is called.

diff --git a/opcodes/ChangeLog b/opcodes/ChangeLog
index f51cc25..71b2eb7 100644 (file)
--- a/opcodes/ChangeLog
+++ b/opcodes/ChangeLog
@@ -1,3 +1,8 @@
+2007-04-09  Kazu Hirata  <kazu@codesourcery.com>
+
+       * m68k-dis.c (print_insn_m68k): Restore info->fprintf_func and
+       info->print_address_func if longjmp is called.
+
 2007-03-29  DJ Delorie  <dj@redhat.com>
 
        * m32c-desc.c: Regenerate.

diff --git a/opcodes/m68k-dis.c b/opcodes/m68k-dis.c
index 08a2838..16ad7e4 100644 (file)
--- a/opcodes/m68k-dis.c
+++ b/opcodes/m68k-dis.c
@@ -1475,6 +1475,12 @@ print_insn_m68k (bfd_vma memaddr, disassemble_info *info)
 
   bfd_byte *buffer = priv.the_buffer;
 
+  /* Save these printing functions in case we need to restore them
+     later.  */
+  fprintf_ftype save_printer = info->fprintf_func;
+  void (* save_print_address) (bfd_vma, struct disassemble_info *)
+    = info->print_address_func;
+
   info->private_data = (PTR) &priv;
   /* Tell objdump to use two bytes per chunk
      and six bytes per line for displaying raw data.  */
@@ -1485,8 +1491,26 @@ print_insn_m68k (bfd_vma memaddr, disassemble_info *info)
   priv.insn_start = memaddr;
 
   if (setjmp (priv.bailout) != 0)
-    /* Error return.  */
-    return -1;
+    {
+      /* longjmp may be called while these printing functions are
+        temporarily replaced with dummy functions.  Restore them
+        before we leave.
+
+        Admittedly, this save-and-restore operation is somewhat ugly
+        in that we are exposing the fact that match_insn_m68k
+        temporarily replaces insn->fprintf_func and
+        insn->print_address_func.  Perhaps, a real fix is to report a
+        FETCH_DATA failure with a return value of some sort, without
+        using setjmp/longjmp.  A better fix may be to teach the m68k
+        disassembler do its job without temporarily replacing
+        insn->fprintf_func and insn->print_address_func, but that's a
+        task for another day.  */
+      info->fprintf_func = save_printer;
+      info->print_address_func = save_print_address;
+
+      /* Error return.  */
+      return -1;
+    }
 
   arch_mask = bfd_m68k_mach_to_features (info->mach);
   if (!arch_mask)