/* Print VAX instructions.
- Copyright (C) 1995, 1998 Free Software Foundation, Inc.
+ Copyright 1995, 1998, 2000, 2001, 2002, 2005
+ Free Software Foundation, Inc.
Contributed by Pauline Middelink <middelin@polyware.iaf.nl>
-This program 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.
+ This program 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.
-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.
+ 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.
-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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+ 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., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
+#include <setjmp.h>
+#include <string.h>
+#include "sysdep.h"
#include "opcode/vax.h"
#include "dis-asm.h"
/* Local function prototypes */
-static int
-print_insn_arg PARAMS ((const char *, unsigned char *, bfd_vma,
- disassemble_info *));
+static int fetch_data PARAMS ((struct disassemble_info *, bfd_byte *));
+static int print_insn_arg
+ PARAMS ((const char *, unsigned char *, bfd_vma, disassemble_info *));
+static int print_insn_mode
+ PARAMS ((const char *, int, unsigned char *, bfd_vma, disassemble_info *));
-static int
-print_insn_mode PARAMS ((int, unsigned char *, bfd_vma, disassemble_info *));
static char *reg_names[] =
{
"r8", "r9", "r10", "r11", "ap", "fp", "sp", "pc"
};
+/* Definitions for the function entry mask bits. */
+static char *entry_mask_bit[] =
+{
+ /* Registers 0 and 1 shall not be saved, since they're used to pass back
+ a function's result to its caller... */
+ "~r0~", "~r1~",
+ /* Registers 2 .. 11 are normal registers. */
+ "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10", "r11",
+ /* Registers 12 and 13 are argument and frame pointer and must not
+ be saved by using the entry mask. */
+ "~ap~", "~fp~",
+ /* Bits 14 and 15 control integer and decimal overflow. */
+ "IntOvfl", "DecOvfl",
+};
+
/* Sign-extend an (unsigned char). */
#if __STDC__ == 1
#define COERCE_SIGNED_CHAR(ch) ((signed char)(ch))
/* Maximum length of an instruction. */
#define MAXLEN 25
-#include <setjmp.h>
-
struct private
{
/* Points to first byte not fetched. */
- bfd_byte *max_fetched;
- bfd_byte the_buffer[MAXLEN];
- bfd_vma insn_start;
- jmp_buf bailout;
+ bfd_byte * max_fetched;
+ bfd_byte the_buffer[MAXLEN];
+ bfd_vma insn_start;
+ jmp_buf bailout;
};
/* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
return 1;
}
+/* Entry mask handling. */
+static unsigned int entry_addr_occupied_slots = 0;
+static unsigned int entry_addr_total_slots = 0;
+static bfd_vma * entry_addr = NULL;
+
+/* Parse the VAX specific disassembler options. These contain function
+ entry addresses, which can be useful to disassemble ROM images, since
+ there's no symbol table. Returns TRUE upon success, FALSE otherwise. */
+
+static bfd_boolean
+parse_disassembler_options (char * options)
+{
+ const char * entry_switch = "entry:";
+
+ while ((options = strstr (options, entry_switch)))
+ {
+ options += strlen (entry_switch);
+
+ /* The greater-than part of the test below is paranoia. */
+ if (entry_addr_occupied_slots >= entry_addr_total_slots)
+ {
+ /* A guesstimate of the number of entries we will have to create. */
+ entry_addr_total_slots +=
+ strlen (options) / (strlen (entry_switch) + 5);
+
+ entry_addr = realloc (entry_addr, sizeof (bfd_vma)
+ * entry_addr_total_slots);
+ }
+
+ if (entry_addr == NULL)
+ return FALSE;
+
+ entry_addr[entry_addr_occupied_slots] = bfd_scan_vma (options, NULL, 0);
+ entry_addr_occupied_slots ++;
+ }
+
+ return TRUE;
+}
+
+#if 0 /* FIXME: Ideally the disassembler should have target specific
+ initialisation and termination function pointers. Then
+ parse_disassembler_options could be the init function and
+ free_entry_array (below) could be the termination routine.
+ Until then there is no way for the disassembler to tell us
+ that it has finished and that we no longer need the entry
+ array, so this routine is suppressed for now. It does mean
+ that we leak memory, but only to the extent that we do not
+ free it just before the disassembler is about to terminate
+ anyway. */
+
+/* Free memory allocated to our entry array. */
+
+static void
+free_entry_array (void)
+{
+ if (entry_addr)
+ {
+ free (entry_addr);
+ entry_addr = NULL;
+ entry_addr_occupied_slots = entry_addr_total_slots = 0;
+ }
+}
+#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. */
+
+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. */
+ if (info->symbols
+ && info->symbols[0]
+ && (info->symbols[0]->flags & BSF_FUNCTION)
+ && addr == bfd_asymbol_value (info->symbols[0]))
+ return TRUE;
+
+ /* Check for forced function entry address. */
+ for (i = entry_addr_occupied_slots; i--;)
+ if (entry_addr[i] == addr)
+ return TRUE;
+
+ return FALSE;
+}
+
/* Print the vax instruction at address MEMADDR in debugged memory,
on INFO->STREAM. Returns length of the instruction, in bytes. */
bfd_vma memaddr;
disassemble_info *info;
{
+ static bfd_boolean parsed_disassembler_options = FALSE;
const struct vot *votp;
- const char *argp = NULL;
+ const char *argp;
unsigned char *arg;
struct private priv;
bfd_byte *buffer = priv.the_buffer;
info->private_data = (PTR) &priv;
priv.max_fetched = priv.the_buffer;
priv.insn_start = memaddr;
+
+ if (! parsed_disassembler_options
+ && info->disassembler_options != NULL)
+ {
+ parse_disassembler_options (info->disassembler_options);
+
+ /* To avoid repeated parsing of these options. */
+ parsed_disassembler_options = TRUE;
+ }
+
if (setjmp (priv.bailout) != 0)
{
/* Error return. */
return -1;
}
- FETCH_DATA (info, buffer + 2);
+ argp = NULL;
+ /* Check if the info buffer has more than one byte left since
+ the last opcode might be a single byte with no argument data. */
+ if (info->buffer_length - (memaddr - info->buffer_vma) > 1)
+ {
+ FETCH_DATA (info, buffer + 2);
+ }
+ else
+ {
+ FETCH_DATA (info, buffer + 1);
+ buffer[1] = 0;
+ }
+
+ /* Decode function entry mask. */
+ if (is_function_entry (info, memaddr))
+ {
+ int i = 0;
+ int register_mask = buffer[1] << 8 | buffer[0];
+
+ (*info->fprintf_func) (info->stream, ".word 0x%04x # Entry mask: <",
+ register_mask);
+
+ for (i = 15; i >= 0; i--)
+ if (register_mask & (1 << i))
+ (*info->fprintf_func) (info->stream, " %s", entry_mask_bit[i]);
+
+ (*info->fprintf_func) (info->stream, " >");
+
+ return 2;
+ }
+
for (votp = &votstrs[0]; votp->name[0]; votp++)
{
register vax_opcodeT opcode = votp->detail.code;
return p - p0;
}
- return print_insn_mode (arg_len, p0, addr, info);
+ return print_insn_mode (d, arg_len, p0, addr, info);
}
static int
-print_insn_mode (size, p0, addr, info)
+print_insn_mode (d, size, p0, addr, info)
+ const char *d;
int size;
unsigned char *p0;
bfd_vma addr; /* PC for this arg to be relative to */
case 0x10:
case 0x20:
case 0x30: /* literal mode $number */
- (*info->fprintf_func) (info->stream, "$0x%x", mode);
+ if (d[1] == 'd' || d[1] == 'f' || d[1] == 'g' || d[1] == 'h')
+ (*info->fprintf_func) (info->stream, "$0x%x [%c-float]", mode, d[1]);
+ else
+ (*info->fprintf_func) (info->stream, "$0x%x", mode);
break;
case 0x40: /* index: base-addr[Rn] */
- p += print_insn_mode (size, p0 + 1, addr + 1, info);
+ p += print_insn_mode (d, size, p0 + 1, addr + 1, info);
(*info->fprintf_func) (info->stream, "[%s]", reg_names[reg]);
break;
case 0x50: /* register: Rn */
FETCH_DATA (info, p + size);
(*info->fprintf_func) (info->stream, "$0x");
- for (i = 0; i < size; i++)
- (*info->fprintf_func) (info->stream, "%02x", p[size - i - 1]);
+ if (d[1] == 'd' || d[1] == 'f' || d[1] == 'g' || d[1] == 'h')
+ {
+ int float_word;
+
+ float_word = p[0] | (p[1] << 8);
+ if ((d[1] == 'd' || d[1] == 'f')
+ && (float_word & 0xff80) == 0x8000)
+ {
+ (*info->fprintf_func) (info->stream, "[invalid %c-float]",
+ d[1]);
+ }
+ else
+ {
+ for (i = 0; i < size; i++)
+ (*info->fprintf_func) (info->stream, "%02x",
+ p[size - i - 1]);
+ (*info->fprintf_func) (info->stream, " [%c-float]", d[1]);
+ }
+ }
+ else
+ {
+ for (i = 0; i < size; i++)
+ (*info->fprintf_func) (info->stream, "%02x", p[size - i - 1]);
+ }
p += size;
}
else