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., 675 Mass Ave, Cambridge, MA 02139, USA. */
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#include "dis-asm.h"
-#include "ieee-float.h"
-
-extern CONST struct ext_format ext_format_68881;
-
-/* Opcode/m68k.h is a massive table. As a kludge, break it up into
- two pieces. This makes nonportable C -- FIXME -- it assumes that
- two data items declared near each other will be contiguous in
- memory. This kludge can be removed, FIXME, when GCC is fixed to not
- be a hog about initializers. */
-
-#ifdef __GNUC__
-#define BREAK_UP_BIG_DECL }; \
- struct m68k_opcode m68k_opcodes_2[] = {
-#define AND_OTHER_PART sizeof (m68k_opcodes_2)
-#endif
+#include "floatformat.h"
#include "opcode/m68k.h"
-
/* Local function prototypes */
static int
fetch_arg PARAMS ((unsigned char *, int, int, disassemble_info *));
static void
-print_base PARAMS ((int, int, disassemble_info*));
+print_base PARAMS ((int, bfd_vma, disassemble_info*));
static unsigned char *
print_indexed PARAMS ((int, unsigned char *, bfd_vma, disassemble_info *));
-static unsigned char *
-print_insn_arg PARAMS ((char *, unsigned char *, unsigned char *, bfd_vma,
- disassemble_info *));
+static int
+print_insn_arg PARAMS ((const char *, unsigned char *, unsigned char *,
+ bfd_vma, disassemble_info *));
+
+CONST char * CONST fpcr_names[] = {
+ "", "%fpiar", "%fpsr", "%fpiar/%fpsr", "%fpcr",
+ "%fpiar/%fpcr", "%fpsr/%fpcr", "%fpiar/%fpsr/%fpcr"};
+
+static char *const reg_names[] = {
+ "%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",
+ "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%fp", "%sp",
+ "%ps", "%pc"};
/* Sign-extend an (unsigned char). */
#if __STDC__ == 1
#define COERCE_SIGNED_CHAR(ch) ((int)(((ch) ^ 0x80) & 0xFF) - 128)
#endif
-CONST char * CONST fpcr_names[] = {
- "", "fpiar", "fpsr", "fpiar/fpsr", "fpcr",
- "fpiar/fpcr", "fpsr/fpcr", "fpiar/fpsr/fpcr"};
-
-static char *reg_names[] = {
- "d0", "d1", "d2", "d3", "d4", "d5", "d6", "d7", "a0",
- "a1", "a2", "a3", "a4", "a5", "fp", "sp", "ps", "pc"};
-
-/* Define accessors for 68K's 1, 2, and 4-byte signed quantities.
- The _SHIFT values move the quantity to the high order end of an
- `int' value, so it will sign-extend. Probably a few more casts
- are needed to make it compile without warnings on finicky systems. */
-#define BITS_PER_BYTE 8
-#define WORD_SHIFT (BITS_PER_BYTE * ((sizeof (int)) - 2))
-#define LONG_SHIFT (BITS_PER_BYTE * ((sizeof (int)) - 4))
-
+/* Get a 1 byte signed integer. */
#define NEXTBYTE(p) (p += 2, FETCH_DATA (info, p), COERCE_SIGNED_CHAR(p[-1]))
+/* Get a 2 byte signed integer. */
+#define COERCE16(x) ((int) (((x) ^ 0x8000) - 0x8000))
#define NEXTWORD(p) \
(p += 2, FETCH_DATA (info, p), \
- (((int)((p[-2] << 8) + p[-1])) << WORD_SHIFT) >> WORD_SHIFT)
+ COERCE16 ((p[-2] << 8) + p[-1]))
+/* Get a 4 byte signed integer. */
+#define COERCE32(x) ((int) (((x) ^ 0x80000000) - 0x80000000))
#define NEXTLONG(p) \
(p += 4, FETCH_DATA (info, p), \
- (((int)((((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1])) \
- << LONG_SHIFT) >> LONG_SHIFT)
+ (COERCE32 ((((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1])))
/* NEXTSINGLE and NEXTDOUBLE handle alignment problems, but not
* byte-swapping or other float format differences. FIXME! */
return 1;
}
\f
-static void
-m68k_opcode_error(info, code, place)
+/* This function is used to print to the bit-bucket. */
+static int
+#ifdef __STDC__
+dummy_printer (FILE * file, const char * format, ...)
+#else
+dummy_printer (file) FILE *file;
+#endif
+ { return 0; }
+
+void
+dummy_print_address (vma, info)
+ bfd_vma vma;
struct disassemble_info *info;
- int code, place;
{
- (*info->fprintf_func)(info->stream,
- "<internal error in opcode table: \"%c%c\">",
- code, place);
}
/* Print the m68k instruction at address MEMADDR in debugged memory,
- on STREAM. Returns length of the instruction, in bytes. */
+ on INFO->STREAM. Returns length of the instruction, in bytes. */
int
print_insn_m68k (memaddr, info)
{
register int i;
register unsigned char *p;
- register char *d;
+ unsigned char *save_p;
+ register const char *d;
register unsigned long bestmask;
- int best;
+ const struct m68k_opcode *best = 0;
struct private priv;
bfd_byte *buffer = priv.the_buffer;
+ fprintf_ftype save_printer = info->fprintf_func;
+ void (*save_print_address) PARAMS((bfd_vma, struct disassemble_info*))
+ = info->print_address_func;
info->private_data = (PTR) &priv;
priv.max_fetched = priv.the_buffer;
return -1;
bestmask = 0;
- best = -1;
FETCH_DATA (info, buffer + 2);
- for (i = 0; i < numopcodes; i++)
+ for (i = 0; i < m68k_numopcodes; i++)
{
- register unsigned long opcode = m68k_opcodes[i].opcode;
- register unsigned long match = m68k_opcodes[i].match;
+ const struct m68k_opcode *opc = &m68k_opcodes[i];
+ unsigned long opcode = opc->opcode;
+ unsigned long match = opc->match;
+
if (((0xff & buffer[0] & (match >> 24)) == (0xff & (opcode >> 24)))
&& ((0xff & buffer[1] & (match >> 16)) == (0xff & (opcode >> 16)))
/* Only fetch the next two bytes if we need to. */
/* Don't use for printout the variants of divul and divsl
that have the same register number in two places.
The more general variants will match instead. */
- for (d = m68k_opcodes[i].args; *d; d += 2)
+ for (d = opc->args; *d; d += 2)
if (d[1] == 'D')
break;
point coprocessor instructions which use the same
register number in two places, as above. */
if (*d == 0)
- for (d = m68k_opcodes[i].args; *d; d += 2)
+ for (d = opc->args; *d; d += 2)
if (d[1] == 't')
break;
if (*d == 0 && match > bestmask)
{
- best = i;
+ best = opc;
bestmask = match;
}
}
}
- /* Handle undefined instructions. */
- if (best < 0)
- {
- (*info->fprintf_func) (info->stream, "0%o",
- (buffer[0] << 8) + buffer[1]);
- return 2;
- }
-
- (*info->fprintf_func) (info->stream, "%s", m68k_opcodes[best].name);
+ if (best == 0)
+ goto invalid;
/* Point at first word of argument data,
and at descriptor for first argument. */
p = buffer + 2;
- /* Why do this this way? -MelloN */
- for (d = m68k_opcodes[best].args; *d; d += 2)
+ /* Figure out how long the fixed-size portion of the instruction is.
+ The only place this is stored in the opcode table is
+ in the arguments--look for arguments which specify fields in the 2nd
+ or 3rd words of the instruction. */
+ for (d = best->args; *d; d += 2)
{
+ /* I don't think it is necessary to be checking d[0] here; I suspect
+ all this could be moved to the case statement below. */
if (d[0] == '#')
{
if (d[1] == 'l' && p - buffer < 6)
else if (p - buffer < 4 && d[1] != 'C' && d[1] != '8' )
p = buffer + 4;
}
- if (d[1] >= '1' && d[1] <= '3' && p - buffer < 4)
- p = buffer + 4;
- if (d[1] >= '4' && d[1] <= '6' && p - buffer < 6)
- p = buffer + 6;
if ((d[0] == 'L' || d[0] == 'l') && d[1] == 'w' && p - buffer < 4)
p = buffer + 4;
+ switch (d[1])
+ {
+ case '1':
+ case '2':
+ case '3':
+ case '7':
+ case '8':
+ case '9':
+ case 'i':
+ if (p - buffer < 4)
+ p = buffer + 4;
+ break;
+ case '4':
+ case '5':
+ case '6':
+ if (p - buffer < 6)
+ p = buffer + 6;
+ break;
+ default:
+ break;
+ }
}
+ /* Some opcodes like pflusha and lpstop are exceptions; they take no
+ arguments but are two words long. Recognize them by looking at
+ the lower 16 bits of the mask. */
+ if (p - buffer < 4 && (best->match & 0xFFFF) != 0)
+ p = buffer + 4;
FETCH_DATA (info, p);
- d = m68k_opcodes[best].args;
+ d = best->args;
+
+ /* We can the operands twice. The first time we don't print anything,
+ but look for errors. */
+
+ save_p = p;
+ info->print_address_func = dummy_print_address;
+ info->fprintf_func = (fprintf_ftype)dummy_printer;
+ for ( ; *d; d += 2)
+ {
+ int eaten = print_insn_arg (d, buffer, p, memaddr + p - buffer, info);
+ if (eaten >= 0)
+ p += eaten;
+ else if (eaten == -1)
+ goto invalid;
+ else
+ {
+ (*info->fprintf_func)(info->stream,
+ "<internal error in opcode table: %s %s>\n",
+ best->name,
+ best->args);
+ goto invalid;
+ }
+
+ }
+ p = save_p;
+ info->fprintf_func = save_printer;
+ info->print_address_func = save_print_address;
+
+ d = best->args;
+
+ (*info->fprintf_func) (info->stream, "%s", best->name);
if (*d)
(*info->fprintf_func) (info->stream, " ");
while (*d)
{
- p = print_insn_arg (d, buffer, p, memaddr + p - buffer, info);
+ p += print_insn_arg (d, buffer, p, memaddr + p - buffer, info);
d += 2;
if (*d && *(d - 2) != 'I' && *d != 'k')
(*info->fprintf_func) (info->stream, ",");
}
return p - buffer;
+
+ invalid:
+ /* Handle undefined instructions. */
+ info->fprintf_func = save_printer;
+ info->print_address_func = save_print_address;
+ (*info->fprintf_func) (info->stream, "0%o",
+ (buffer[0] << 8) + buffer[1]);
+ return 2;
}
-static unsigned char *
-print_insn_arg (d, buffer, p, addr, info)
- char *d;
+/* Returns number of bytes "eaten" by the operand, or
+ return -1 if an invalid operand was found, or -2 if
+ an opcode tabe error was found. */
+
+static int
+print_insn_arg (d, buffer, p0, addr, info)
+ const char *d;
unsigned char *buffer;
- register unsigned char *p;
+ unsigned char *p0;
bfd_vma addr; /* PC for this arg to be relative to */
disassemble_info *info;
{
register int val = 0;
register int place = d[1];
+ register unsigned char *p = p0;
int regno;
register CONST char *regname;
register unsigned char *p1;
{
case 'c': /* cache identifier */
{
- static char *cacheFieldName[] = { "NOP", "dc", "ic", "bc" };
+ static char *const cacheFieldName[] = { "nc", "dc", "ic", "bc" };
val = fetch_arg (buffer, place, 2, info);
(*info->fprintf_func) (info->stream, cacheFieldName[val]);
break;
case '_': /* 32-bit absolute address for move16. */
{
val = NEXTLONG (p);
- (*info->fprintf_func) (info->stream, "@#");
- print_address (val, info->stream);
+ (*info->print_address_func) (val, info);
break;
}
case 'C':
- (*info->fprintf_func) (info->stream, "ccr");
+ (*info->fprintf_func) (info->stream, "%%ccr");
break;
case 'S':
- (*info->fprintf_func) (info->stream, "sr");
+ (*info->fprintf_func) (info->stream, "%%sr");
break;
case 'U':
- (*info->fprintf_func) (info->stream, "usp");
+ (*info->fprintf_func) (info->stream, "%%usp");
break;
case 'J':
{
- static struct { char *name; int value; } names[]
- = {{"sfc", 0x000}, {"dfc", 0x001}, {"cacr", 0x002},
- {"tc", 0x003}, {"itt0",0x004}, {"itt1", 0x005},
- {"dtt0",0x006}, {"dtt1",0x007},
- {"usp", 0x800}, {"vbr", 0x801}, {"caar", 0x802},
- {"msp", 0x803}, {"isp", 0x804}, {"mmusr",0x805},
- {"urp", 0x806}, {"srp", 0x807}};
+ static const struct { char *name; int value; } names[]
+ = {{"%sfc", 0x000}, {"%dfc", 0x001}, {"%cacr", 0x002},
+ {"%tc", 0x003}, {"%itt0",0x004}, {"%itt1", 0x005},
+ {"%dtt0",0x006}, {"%dtt1",0x007}, {"%buscr",0x008},
+ {"%usp", 0x800}, {"%vbr", 0x801}, {"%caar", 0x802},
+ {"%msp", 0x803}, {"%ibsp", 0x804},
+
+ /* Should we be calling this psr like we do in case 'Y'? */
+ {"%mmusr",0x805},
+
+ {"%urp", 0x806}, {"%srp", 0x807}, {"%pcr", 0x808}};
val = fetch_arg (buffer, place, 12, info);
for (regno = sizeof names / sizeof names[0] - 1; regno >= 0; regno--)
if (names[regno].value == val)
{
- (*info->fprintf_func) (info->stream, names[regno].name);
+ (*info->fprintf_func) (info->stream, "%s", names[regno].name);
break;
}
if (regno < 0)
break;
case 'r':
- (*info->fprintf_func)
- (info->stream, "%s@",
- reg_names[fetch_arg (buffer, place, 4, info)]);
+ regno = fetch_arg (buffer, place, 4, info);
+ if (regno > 7)
+ (*info->fprintf_func) (info->stream, "%s@", reg_names[regno]);
+ else
+ (*info->fprintf_func) (info->stream, "@(%s)", reg_names[regno]);
break;
case 'F':
(*info->fprintf_func)
- (info->stream, "fp%d",
+ (info->stream, "%%fp%d",
fetch_arg (buffer, place, 3, info));
break;
(*info->fprintf_func) (info->stream, "{#%d}", val);
}
else
- m68k_opcode_error (info, *d, place);
+ return -2;
break;
case '#':
val = fetch_arg (buffer, place, 8, info);
else if (place == 'b')
val = NEXTBYTE (p1);
- else if (place == 'w')
+ else if (place == 'w' || place == 'W')
val = NEXTWORD (p1);
else if (place == 'l')
val = NEXTLONG (p1);
else
- m68k_opcode_error (info, *d, place);
+ return -2;
(*info->fprintf_func) (info->stream, "#%d", val);
break;
val = COERCE_SIGNED_CHAR(buffer[1]);
else if (place == 'w' || place == 'W')
val = NEXTWORD (p);
- else if (place == 'l' || place == 'L')
+ else if (place == 'l' || place == 'L' || place == 'C')
val = NEXTLONG (p);
else if (place == 'g')
{
val = NEXTWORD (p);
}
else
- m68k_opcode_error (info, *d, place);
+ return -2;
- print_address (addr + val, info->stream);
+ (*info->print_address_func) (addr + val, info);
break;
case 'd':
if (val != 1) /* Unusual coprocessor ID? */
(*info->fprintf_func) (info->stream, "(cpid=%d) ", val);
- if (place == 'i')
- p += 2; /* Skip coprocessor extended operands */
break;
case '*':
case '/':
case '&':
case '`':
+ case '|':
if (place == 'd')
{
{
case 0:
val = NEXTWORD (p);
- (*info->fprintf_func) (info->stream, "@#");
- print_address (val, info->stream);
+ (*info->print_address_func) (val, info);
break;
case 1:
val = NEXTLONG (p);
- (*info->fprintf_func) (info->stream, "@#");
- print_address (val, info->stream);
+ (*info->print_address_func) (val, info);
break;
case 2:
val = NEXTWORD (p);
- print_address (addr + val, info->stream);
+ (*info->print_address_func) (addr + val, info);
break;
case 3:
break;
case 'x':
- ieee_extended_to_double (&ext_format_68881,
- (char *)p, &flval);
+ FETCH_DATA (info, p + 12);
+ floatformat_to_double (&floatformat_m68881_ext,
+ (char *) p, &flval);
p += 12;
break;
break;
default:
- m68k_opcode_error (info, *d, place);
+ return -1;
}
if ( flt_p ) /* Print a float? */
(*info->fprintf_func) (info->stream, "#%g", flval);
break;
default:
- (*info->fprintf_func) (info->stream,
- "<invalid address mode 0%o>",
- (unsigned) val);
+ return -1;
}
}
break;
if (doneany)
(*info->fprintf_func) (info->stream, "/");
doneany = 1;
- (*info->fprintf_func) (info->stream, "fp%d", regno);
+ (*info->fprintf_func) (info->stream, "%%fp%d", regno);
first_regno = regno;
while (val & (1 << (regno + 1)))
++regno;
if (regno > first_regno)
- (*info->fprintf_func) (info->stream, "-fp%d", regno);
+ (*info->fprintf_func) (info->stream, "-%%fp%d", regno);
}
}
else
- goto de_fault;
+ return -2;
+ break;
+
+ case 'X':
+ place = '8';
+ case 'Y':
+ case 'Z':
+ case 'W':
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ {
+ int val = fetch_arg (buffer, place, 5, info);
+ char *name = 0;
+ switch (val)
+ {
+ case 2: name = "%tt0"; break;
+ case 3: name = "%tt1"; break;
+ case 0x10: name = "%tc"; break;
+ case 0x11: name = "%drp"; break;
+ case 0x12: name = "%srp"; break;
+ case 0x13: name = "%crp"; break;
+ case 0x14: name = "%cal"; break;
+ case 0x15: name = "%val"; break;
+ case 0x16: name = "%scc"; break;
+ case 0x17: name = "%ac"; break;
+ case 0x18: name = "%psr"; break;
+ case 0x19: name = "%pcsr"; break;
+ case 0x1c:
+ case 0x1d:
+ {
+ int break_reg = ((buffer[3] >> 2) & 7);
+ (*info->fprintf_func)
+ (info->stream, val == 0x1c ? "%%bad%d" : "%%bac%d",
+ break_reg);
+ }
+ break;
+ default:
+ (*info->fprintf_func) (info->stream, "<mmu register %d>", val);
+ }
+ if (name)
+ (*info->fprintf_func) (info->stream, "%s", name);
+ }
+ break;
+
+ case 'f':
+ {
+ int fc = fetch_arg (buffer, place, 5, info);
+ if (fc == 1)
+ (*info->fprintf_func) (info->stream, "%%dfc");
+ else if (fc == 0)
+ (*info->fprintf_func) (info->stream, "%%sfc");
+ else
+ (*info->fprintf_func) (info->stream, "<function code %d>", fc);
+ }
+ break;
+
+ case 'V':
+ (*info->fprintf_func) (info->stream, "%%val");
+ break;
+
+ case 't':
+ {
+ int level = fetch_arg (buffer, place, 3, info);
+ (*info->fprintf_func) (info->stream, "%d", level);
+ }
break;
- default: de_fault:
- m68k_opcode_error (info, *d, ' ');
+ default:
+ return -2;
}
- return (unsigned char *) p;
+ return p - p0;
}
/* Fetch BITS bits from a position in the instruction specified by CODE.
disassemble_info *info;
{
register int word;
- static char *scales[] = {"", "*2", "*4", "*8"};
- register int base_disp;
- register int outer_disp;
+ static char *const scales[] = {"", ":2", ":4", ":8"};
+ bfd_vma base_disp;
+ bfd_vma outer_disp;
char buf[40];
+ char vmabuf[50];
word = NEXTWORD (p);
/* Generate the text for the index register.
Where this will be output is not yet determined. */
- sprintf (buf, "[%s.%c%s]",
+ sprintf (buf, "%s:%c%s",
reg_names[(word >> 12) & 0xf],
(word & 0x800) ? 'l' : 'w',
scales[(word >> 9) & 3]);
if ((word & 0x100) == 0)
{
- print_base (basereg,
- ((word & 0x80) ? word | 0xff00 : word & 0xff)
- + ((basereg == -1) ? addr : 0),
- info);
- (*info->fprintf_func) (info->stream, "%s", buf);
+ word &= 0xff;
+ if ((word & 0x80) != 0)
+ word -= 0x100;
+ if (basereg == -1)
+ word += addr;
+ print_base (basereg, word, info);
+ (*info->fprintf_func) (info->stream, ",%s)", buf);
return p;
}
/* First, compute the displacement to add to the base register. */
if (word & 0200)
- basereg = -2;
+ {
+ if (basereg == -1)
+ basereg = -3;
+ else
+ basereg = -2;
+ }
if (word & 0100)
- buf[0] = 0;
+ buf[0] = '\0';
base_disp = 0;
switch ((word >> 4) & 3)
{
if ((word & 7) == 0)
{
print_base (basereg, base_disp, info);
- (*info->fprintf_func) (info->stream, "%s", buf);
+ if (buf[0] != '\0')
+ (*info->fprintf_func) (info->stream, ",%s", buf);
+ (*info->fprintf_func) (info->stream, ")");
return p;
}
outer_disp = NEXTLONG (p);
}
- (*info->fprintf_func) (info->stream, "%d(", outer_disp);
print_base (basereg, base_disp, info);
-
- /* If postindexed, print the closeparen before the index. */
- if (word & 4)
- (*info->fprintf_func) (info->stream, ")%s", buf);
- /* If preindexed, print the closeparen after the index. */
- else
- (*info->fprintf_func) (info->stream, "%s)", buf);
+ if ((word & 4) == 0 && buf[0] != '\0')
+ {
+ (*info->fprintf_func) (info->stream, ",%s", buf);
+ buf[0] = '\0';
+ }
+ sprintf_vma (vmabuf, outer_disp);
+ (*info->fprintf_func) (info->stream, ")@(%s", vmabuf);
+ if (buf[0] != '\0')
+ (*info->fprintf_func) (info->stream, ",%s", buf);
+ (*info->fprintf_func) (info->stream, ")");
return p;
}
static void
print_base (regno, disp, info)
int regno;
- int disp;
+ bfd_vma disp;
disassemble_info *info;
{
- if (regno == -2)
- (*info->fprintf_func) (info->stream, "%d", disp);
- else if (regno == -1)
- (*info->fprintf_func) (info->stream, "0x%x", (unsigned) disp);
+ if (regno == -1)
+ {
+ (*info->fprintf_func) (info->stream, "%%pc@(");
+ (*info->print_address_func) (disp, info);
+ }
else
- (*info->fprintf_func) (info->stream, "%d(%s)", disp, reg_names[regno]);
+ {
+ char buf[50];
+
+ if (regno == -2)
+ (*info->fprintf_func) (info->stream, "@(");
+ else if (regno == -3)
+ (*info->fprintf_func) (info->stream, "%%zpc@(");
+ else
+ (*info->fprintf_func) (info->stream, "%s@(", reg_names[regno]);
+
+ sprintf_vma (buf, disp);
+ (*info->fprintf_func) (info->stream, "%s", buf);
+ }
}