/* Print VAX instructions.
- Copyright 1995, 1998, 2000, 2001, 2002, 2005
- Free Software Foundation, Inc.
+ Copyright (C) 1995-2014 Free Software Foundation, Inc.
Contributed by Pauline Middelink <middelin@polyware.iaf.nl>
- This program is free software; you can redistribute it and/or modify
+ This file is part of the GNU opcodes library.
+
+ This library is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
- the Free Software Foundation; either version 2 of the License, or
- (at your option) any later version.
+ the Free Software Foundation; either version 3, or (at your option)
+ any later version.
- This program is distributed in the hope that it will be useful,
- but WITHOUT ANY WARRANTY; without even the implied warranty of
- MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
- GNU General Public License for more details.
+ It is distributed in the hope that it will be useful, but WITHOUT
+ ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
+ or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public
+ License for more details.
You should have received a copy of the GNU General Public License
along with this program; if not, write to the Free Software
Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
MA 02110-1301, USA. */
+#include "sysdep.h"
#include <setjmp.h>
#include <string.h>
-#include "sysdep.h"
#include "opcode/vax.h"
#include "dis-asm.h"
}
}
#endif
-/* Check if the given address is a known function entry. Either there must
- be a symbol of function type at this address, or the address must be
- a forced entry point. The later helps in disassembling ROM images, because
- there's no symbol table at all. Forced entry points can be given by
- supplying several -M options to objdump: -M entry:0xffbb7730. */
+/* Check if the given address is a known function entry point. This is
+ the case if there is a symbol of the function type at this address.
+ We also check for synthetic symbols as these are used for PLT entries
+ (weak undefined symbols may not have the function type set). Finally
+ the address may have been forced to be treated as an entry point. The
+ latter helps in disassembling ROM images, because there's no symbol
+ table at all. Forced entry points can be given by supplying several
+ -M options to objdump: -M entry:0xffbb7730. */
static bfd_boolean
is_function_entry (struct disassemble_info *info, bfd_vma addr)
{
unsigned int i;
- /* Check if there's a BSF_FUNCTION symbol at our address. */
+ /* Check if there's a function or PLT symbol at our address. */
if (info->symbols
&& info->symbols[0]
- && (info->symbols[0]->flags & BSF_FUNCTION)
+ && (info->symbols[0]->flags & (BSF_FUNCTION | BSF_SYNTHETIC))
&& addr == bfd_asymbol_value (info->symbols[0]))
return TRUE;
return FALSE;
}
+/* Check if the given address is the last longword of a PLT entry.
+ This longword is data and depending on the value it may interfere
+ with disassembly of further PLT entries. We make use of the fact
+ PLT symbols are marked BSF_SYNTHETIC. */
+static bfd_boolean
+is_plt_tail (struct disassemble_info *info, bfd_vma addr)
+{
+ if (info->symbols
+ && info->symbols[0]
+ && (info->symbols[0]->flags & BSF_SYNTHETIC)
+ && addr == bfd_asymbol_value (info->symbols[0]) + 8)
+ return TRUE;
+
+ return FALSE;
+}
+
static int
print_insn_mode (const char *d,
int size,
return 2;
}
+ /* Decode PLT entry offset longword. */
+ if (is_plt_tail (info, memaddr))
+ {
+ int offset;
+
+ FETCH_DATA (info, buffer + 4);
+ offset = buffer[3] << 24 | buffer[2] << 16 | buffer[1] << 8 | buffer[0];
+ (*info->fprintf_func) (info->stream, ".long 0x%08x", offset);
+
+ return 4;
+ }
+
for (votp = &votstrs[0]; votp->name[0]; votp++)
{
vax_opcodeT opcode = votp->detail.code;