mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-06 11:27:05 +00:00
d747e0af3d
* All GDB files that #include defs.h: Removed stdio.h. (defs.h): #include stdio.h. This has been tested by building GDBs for all targets hosted on Sun4. None of the build problems were related to stdio.h inclusion. (n.b. many configurations don't build for other reasons.)
785 lines
18 KiB
C
785 lines
18 KiB
C
/* Print Motorola 68k instructions for GDB, the GNU debugger.
|
||
Copyright 1986, 1987, 1989, 1991 Free Software Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
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.
|
||
|
||
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. */
|
||
|
||
#include "defs.h"
|
||
#include "symtab.h"
|
||
#include "opcode/m68k.h"
|
||
#include "gdbcore.h"
|
||
|
||
/* Local function prototypes */
|
||
|
||
static int
|
||
fetch_arg PARAMS ((unsigned char *, int, int));
|
||
|
||
static void
|
||
print_base PARAMS ((int, int, FILE *));
|
||
|
||
static unsigned char *
|
||
print_indexed PARAMS ((int, unsigned char *, CORE_ADDR, FILE *));
|
||
|
||
static unsigned char *
|
||
print_insn_arg PARAMS ((char *, unsigned char *, unsigned char *, CORE_ADDR,
|
||
FILE *));
|
||
|
||
/* 68k instructions are never longer than this many bytes. */
|
||
#define MAXLEN 22
|
||
|
||
/* Number of elements in the opcode table. */
|
||
#define NOPCODES (sizeof m68k_opcodes / sizeof m68k_opcodes[0])
|
||
|
||
extern char *reg_names[];
|
||
char *fpcr_names[] = { "", "fpiar", "fpsr", "fpiar/fpsr", "fpcr",
|
||
"fpiar/fpcr", "fpsr/fpcr", "fpiar-fpcr"};
|
||
|
||
|
||
#define NEXTBYTE(p) (p += 2, ((char *)p)[-1])
|
||
|
||
#define NEXTWORD(p) \
|
||
(p += 2, ((((char *)p)[-2]) << 8) + p[-1])
|
||
|
||
#define NEXTLONG(p) \
|
||
(p += 4, (((((p[-4] << 8) + p[-3]) << 8) + p[-2]) << 8) + p[-1])
|
||
|
||
#define NEXTSINGLE(p) \
|
||
(p += 4, *((float *)(p - 4)))
|
||
|
||
#define NEXTDOUBLE(p) \
|
||
(p += 8, *((double *)(p - 8)))
|
||
|
||
#define NEXTEXTEND(p) \
|
||
(p += 12, 0.0) /* Need a function to convert from extended to double
|
||
precision... */
|
||
|
||
#define NEXTPACKED(p) \
|
||
(p += 12, 0.0) /* Need a function to convert from packed to double
|
||
precision. Actually, it's easier to print a
|
||
packed number than a double anyway, so maybe
|
||
there should be a special case to handle this... */
|
||
|
||
/* Print the m68k instruction at address MEMADDR in debugged memory,
|
||
on STREAM. Returns length of the instruction, in bytes. */
|
||
|
||
int
|
||
print_insn (memaddr, stream)
|
||
CORE_ADDR memaddr;
|
||
FILE *stream;
|
||
{
|
||
unsigned char buffer[MAXLEN];
|
||
register int i;
|
||
register unsigned char *p;
|
||
register char *d;
|
||
register int bestmask;
|
||
int best;
|
||
|
||
read_memory (memaddr, (char *) buffer, MAXLEN);
|
||
|
||
bestmask = 0;
|
||
best = -1;
|
||
for (i = 0; i < NOPCODES; i++)
|
||
{
|
||
register unsigned int opcode = m68k_opcodes[i].opcode;
|
||
register unsigned int match = m68k_opcodes[i].match;
|
||
if (((0xff & buffer[0] & (match >> 24)) == (0xff & (opcode >> 24)))
|
||
&& ((0xff & buffer[1] & (match >> 16)) == (0xff & (opcode >> 16)))
|
||
&& ((0xff & buffer[2] & (match >> 8)) == (0xff & (opcode >> 8)))
|
||
&& ((0xff & buffer[3] & match) == (0xff & opcode)))
|
||
{
|
||
/* 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)
|
||
if (d[1] == 'D')
|
||
break;
|
||
|
||
/* Don't use for printout the variants of most floating
|
||
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)
|
||
if (d[1] == 't')
|
||
break;
|
||
|
||
if (*d == 0 && match > bestmask)
|
||
{
|
||
best = i;
|
||
bestmask = match;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Handle undefined instructions. */
|
||
if (best < 0)
|
||
{
|
||
fprintf_filtered (stream, "0%o", (buffer[0] << 8) + buffer[1]);
|
||
return 2;
|
||
}
|
||
|
||
fprintf_filtered (stream, "%s", m68k_opcodes[best].name);
|
||
|
||
/* 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)
|
||
{
|
||
if (d[0] == '#')
|
||
{
|
||
if (d[1] == 'l' && p - buffer < 6)
|
||
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;
|
||
}
|
||
|
||
d = m68k_opcodes[best].args;
|
||
|
||
if (*d)
|
||
fputs_filtered (" ", stream);
|
||
|
||
while (*d)
|
||
{
|
||
p = print_insn_arg (d, buffer, p, memaddr + p - buffer, stream);
|
||
d += 2;
|
||
if (*d && *(d - 2) != 'I' && *d != 'k')
|
||
fputs_filtered (",", stream);
|
||
}
|
||
return p - buffer;
|
||
}
|
||
|
||
static unsigned char *
|
||
print_insn_arg (d, buffer, p, addr, stream)
|
||
char *d;
|
||
unsigned char *buffer;
|
||
register unsigned char *p;
|
||
CORE_ADDR addr; /* PC for this arg to be relative to */
|
||
FILE *stream;
|
||
{
|
||
register int val;
|
||
register int place = d[1];
|
||
int regno;
|
||
register char *regname;
|
||
register unsigned char *p1;
|
||
register double flval;
|
||
int flt_p;
|
||
|
||
switch (*d)
|
||
{
|
||
case 'C':
|
||
fprintf_filtered (stream, "ccr");
|
||
break;
|
||
|
||
case 'S':
|
||
fprintf_filtered (stream, "sr");
|
||
break;
|
||
|
||
case 'U':
|
||
fprintf_filtered (stream, "usp");
|
||
break;
|
||
|
||
case 'J':
|
||
{
|
||
static struct { char *name; int value; } names[]
|
||
= {{"sfc", 0x000}, {"dfc", 0x001}, {"cacr", 0x002},
|
||
{"usp", 0x800}, {"vbr", 0x801}, {"caar", 0x802},
|
||
{"msp", 0x803}, {"isp", 0x804}};
|
||
|
||
val = fetch_arg (buffer, place, 12);
|
||
for (regno = sizeof names / sizeof names[0] - 1; regno >= 0; regno--)
|
||
if (names[regno].value == val)
|
||
{
|
||
fprintf_filtered (stream, names[regno].name);
|
||
break;
|
||
}
|
||
if (regno < 0)
|
||
fprintf_filtered (stream, "%d", val);
|
||
}
|
||
break;
|
||
|
||
case 'Q':
|
||
val = fetch_arg (buffer, place, 3);
|
||
/* 0 means 8, except for the bkpt instruction... */
|
||
if (val == 0 && d[1] != 's')
|
||
val = 8;
|
||
fprintf_filtered (stream, "#%d", val);
|
||
break;
|
||
|
||
case 'M':
|
||
val = fetch_arg (buffer, place, 8);
|
||
if (val & 0x80)
|
||
val = val - 0x100;
|
||
fprintf_filtered (stream, "#%d", val);
|
||
break;
|
||
|
||
case 'T':
|
||
val = fetch_arg (buffer, place, 4);
|
||
fprintf_filtered (stream, "#%d", val);
|
||
break;
|
||
|
||
case 'D':
|
||
fprintf_filtered (stream, "%s", reg_names[fetch_arg (buffer, place, 3)]);
|
||
break;
|
||
|
||
case 'A':
|
||
fprintf_filtered (stream, "%s",
|
||
reg_names[fetch_arg (buffer, place, 3) + 010]);
|
||
break;
|
||
|
||
case 'R':
|
||
fprintf_filtered (stream, "%s", reg_names[fetch_arg (buffer, place, 4)]);
|
||
break;
|
||
|
||
case 'F':
|
||
fprintf_filtered (stream, "fp%d", fetch_arg (buffer, place, 3));
|
||
break;
|
||
|
||
case 'O':
|
||
val = fetch_arg (buffer, place, 6);
|
||
if (val & 0x20)
|
||
fprintf_filtered (stream, "%s", reg_names [val & 7]);
|
||
else
|
||
fprintf_filtered (stream, "%d", val);
|
||
break;
|
||
|
||
case '+':
|
||
fprintf_filtered (stream, "%s@+",
|
||
reg_names[fetch_arg (buffer, place, 3) + 8]);
|
||
break;
|
||
|
||
case '-':
|
||
fprintf_filtered (stream, "%s@-",
|
||
reg_names[fetch_arg (buffer, place, 3) + 8]);
|
||
break;
|
||
|
||
case 'k':
|
||
if (place == 'k')
|
||
fprintf_filtered (stream, "{%s}", reg_names[fetch_arg (buffer, place, 3)]);
|
||
else if (place == 'C')
|
||
{
|
||
val = fetch_arg (buffer, place, 7);
|
||
if ( val > 63 ) /* This is a signed constant. */
|
||
val -= 128;
|
||
fprintf_filtered (stream, "{#%d}", val);
|
||
}
|
||
else
|
||
error ("Invalid arg format in opcode table: \"%c%c\".",
|
||
*d, place);
|
||
break;
|
||
|
||
case '#':
|
||
case '^':
|
||
p1 = buffer + (*d == '#' ? 2 : 4);
|
||
if (place == 's')
|
||
val = fetch_arg (buffer, place, 4);
|
||
else if (place == 'C')
|
||
val = fetch_arg (buffer, place, 7);
|
||
else if (place == '8')
|
||
val = fetch_arg (buffer, place, 3);
|
||
else if (place == '3')
|
||
val = fetch_arg (buffer, place, 8);
|
||
else if (place == 'b')
|
||
val = NEXTBYTE (p1);
|
||
else if (place == 'w')
|
||
val = NEXTWORD (p1);
|
||
else if (place == 'l')
|
||
val = NEXTLONG (p1);
|
||
else
|
||
error ("Invalid arg format in opcode table: \"%c%c\".",
|
||
*d, place);
|
||
fprintf_filtered (stream, "#%d", val);
|
||
break;
|
||
|
||
case 'B':
|
||
if (place == 'b')
|
||
val = NEXTBYTE (p);
|
||
else if (place == 'B')
|
||
val = buffer[1];
|
||
else if (place == 'w' || place == 'W')
|
||
val = NEXTWORD (p);
|
||
else if (place == 'l' || place == 'L')
|
||
val = NEXTLONG (p);
|
||
else if (place == 'g')
|
||
{
|
||
val = ((char *)buffer)[1];
|
||
if (val == 0)
|
||
val = NEXTWORD (p);
|
||
else if (val == -1)
|
||
val = NEXTLONG (p);
|
||
}
|
||
else if (place == 'c')
|
||
{
|
||
if (buffer[1] & 0x40) /* If bit six is one, long offset */
|
||
val = NEXTLONG (p);
|
||
else
|
||
val = NEXTWORD (p);
|
||
}
|
||
else
|
||
error ("Invalid arg format in opcode table: \"%c%c\".",
|
||
*d, place);
|
||
|
||
print_address (addr + val, stream);
|
||
break;
|
||
|
||
case 'd':
|
||
val = NEXTWORD (p);
|
||
fprintf_filtered (stream, "%s@(%d)",
|
||
reg_names[fetch_arg (buffer, place, 3)], val);
|
||
break;
|
||
|
||
case 's':
|
||
fprintf_filtered (stream, "%s",
|
||
fpcr_names[fetch_arg (buffer, place, 3)]);
|
||
break;
|
||
|
||
case 'I':
|
||
val = fetch_arg (buffer, 'd', 3); /* Get coprocessor ID... */
|
||
if (val != 1) /* Unusual coprocessor ID? */
|
||
fprintf_filtered (stream, "(cpid=%d) ", val);
|
||
if (place == 'i')
|
||
p += 2; /* Skip coprocessor extended operands */
|
||
break;
|
||
|
||
case '*':
|
||
case '~':
|
||
case '%':
|
||
case ';':
|
||
case '@':
|
||
case '!':
|
||
case '$':
|
||
case '?':
|
||
case '/':
|
||
case '&':
|
||
|
||
if (place == 'd')
|
||
{
|
||
val = fetch_arg (buffer, 'x', 6);
|
||
val = ((val & 7) << 3) + ((val >> 3) & 7);
|
||
}
|
||
else
|
||
val = fetch_arg (buffer, 's', 6);
|
||
|
||
/* Get register number assuming address register. */
|
||
regno = (val & 7) + 8;
|
||
regname = reg_names[regno];
|
||
switch (val >> 3)
|
||
{
|
||
case 0:
|
||
fprintf_filtered (stream, "%s", reg_names[val]);
|
||
break;
|
||
|
||
case 1:
|
||
fprintf_filtered (stream, "%s", regname);
|
||
break;
|
||
|
||
case 2:
|
||
fprintf_filtered (stream, "%s@", regname);
|
||
break;
|
||
|
||
case 3:
|
||
fprintf_filtered (stream, "%s@+", regname);
|
||
break;
|
||
|
||
case 4:
|
||
fprintf_filtered (stream, "%s@-", regname);
|
||
break;
|
||
|
||
case 5:
|
||
val = NEXTWORD (p);
|
||
fprintf_filtered (stream, "%s@(%d)", regname, val);
|
||
break;
|
||
|
||
case 6:
|
||
p = print_indexed (regno, p, addr, stream);
|
||
break;
|
||
|
||
case 7:
|
||
switch (val & 7)
|
||
{
|
||
case 0:
|
||
val = NEXTWORD (p);
|
||
fprintf_filtered (stream, "@#");
|
||
print_address (val, stream);
|
||
break;
|
||
|
||
case 1:
|
||
val = NEXTLONG (p);
|
||
fprintf_filtered (stream, "@#");
|
||
print_address (val, stream);
|
||
break;
|
||
|
||
case 2:
|
||
val = NEXTWORD (p);
|
||
print_address (addr + val, stream);
|
||
break;
|
||
|
||
case 3:
|
||
p = print_indexed (-1, p, addr, stream);
|
||
break;
|
||
|
||
case 4:
|
||
flt_p = 1; /* Assume it's a float... */
|
||
switch( place )
|
||
{
|
||
case 'b':
|
||
val = NEXTBYTE (p);
|
||
flt_p = 0;
|
||
break;
|
||
|
||
case 'w':
|
||
val = NEXTWORD (p);
|
||
flt_p = 0;
|
||
break;
|
||
|
||
case 'l':
|
||
val = NEXTLONG (p);
|
||
flt_p = 0;
|
||
break;
|
||
|
||
case 'f':
|
||
flval = NEXTSINGLE(p);
|
||
break;
|
||
|
||
case 'F':
|
||
flval = NEXTDOUBLE(p);
|
||
break;
|
||
|
||
case 'x':
|
||
flval = NEXTEXTEND(p);
|
||
break;
|
||
|
||
case 'p':
|
||
flval = NEXTPACKED(p);
|
||
break;
|
||
|
||
default:
|
||
error ("Invalid arg format in opcode table: \"%c%c\".",
|
||
*d, place);
|
||
}
|
||
if ( flt_p ) /* Print a float? */
|
||
fprintf_filtered (stream, "#%g", flval);
|
||
else
|
||
fprintf_filtered (stream, "#%d", val);
|
||
break;
|
||
|
||
default:
|
||
fprintf_filtered (stream, "<invalid address mode 0%o>", val);
|
||
}
|
||
}
|
||
break;
|
||
|
||
case 'L':
|
||
case 'l':
|
||
if (place == 'w')
|
||
{
|
||
char doneany;
|
||
p1 = buffer + 2;
|
||
val = NEXTWORD (p1);
|
||
/* Move the pointer ahead if this point is farther ahead
|
||
than the last. */
|
||
p = p1 > p ? p1 : p;
|
||
if (val == 0)
|
||
{
|
||
fputs_filtered ("#0", stream);
|
||
break;
|
||
}
|
||
if (*d == 'l')
|
||
{
|
||
register int newval = 0;
|
||
for (regno = 0; regno < 16; ++regno)
|
||
if (val & (0x8000 >> regno))
|
||
newval |= 1 << regno;
|
||
val = newval;
|
||
}
|
||
val &= 0xffff;
|
||
doneany = 0;
|
||
for (regno = 0; regno < 16; ++regno)
|
||
if (val & (1 << regno))
|
||
{
|
||
int first_regno;
|
||
if (doneany)
|
||
fputs_filtered ("/", stream);
|
||
doneany = 1;
|
||
fprintf_filtered (stream, "%s", reg_names[regno]);
|
||
first_regno = regno;
|
||
while (val & (1 << (regno + 1)))
|
||
++regno;
|
||
if (regno > first_regno)
|
||
fprintf_filtered (stream, "-%s", reg_names[regno]);
|
||
}
|
||
}
|
||
else if (place == '3')
|
||
{
|
||
/* `fmovem' insn. */
|
||
char doneany;
|
||
val = fetch_arg (buffer, place, 8);
|
||
if (val == 0)
|
||
{
|
||
fputs_filtered ("#0", stream);
|
||
break;
|
||
}
|
||
if (*d == 'l')
|
||
{
|
||
register int newval = 0;
|
||
for (regno = 0; regno < 8; ++regno)
|
||
if (val & (0x80 >> regno))
|
||
newval |= 1 << regno;
|
||
val = newval;
|
||
}
|
||
val &= 0xff;
|
||
doneany = 0;
|
||
for (regno = 0; regno < 8; ++regno)
|
||
if (val & (1 << regno))
|
||
{
|
||
int first_regno;
|
||
if (doneany)
|
||
fputs_filtered ("/", stream);
|
||
doneany = 1;
|
||
fprintf_filtered (stream, "fp%d", regno);
|
||
first_regno = regno;
|
||
while (val & (1 << (regno + 1)))
|
||
++regno;
|
||
if (regno > first_regno)
|
||
fprintf_filtered (stream, "-fp%d", regno);
|
||
}
|
||
}
|
||
else
|
||
abort ();
|
||
break;
|
||
|
||
default:
|
||
error ("Invalid arg format in opcode table: \"%c\".", *d);
|
||
}
|
||
|
||
return (unsigned char *) p;
|
||
}
|
||
|
||
/* Fetch BITS bits from a position in the instruction specified by CODE.
|
||
CODE is a "place to put an argument", or 'x' for a destination
|
||
that is a general address (mode and register).
|
||
BUFFER contains the instruction. */
|
||
|
||
static int
|
||
fetch_arg (buffer, code, bits)
|
||
unsigned char *buffer;
|
||
int code;
|
||
int bits;
|
||
{
|
||
register int val;
|
||
switch (code)
|
||
{
|
||
case 's':
|
||
val = buffer[1];
|
||
break;
|
||
|
||
case 'd': /* Destination, for register or quick. */
|
||
val = (buffer[0] << 8) + buffer[1];
|
||
val >>= 9;
|
||
break;
|
||
|
||
case 'x': /* Destination, for general arg */
|
||
val = (buffer[0] << 8) + buffer[1];
|
||
val >>= 6;
|
||
break;
|
||
|
||
case 'k':
|
||
val = (buffer[3] >> 4);
|
||
break;
|
||
|
||
case 'C':
|
||
val = buffer[3];
|
||
break;
|
||
|
||
case '1':
|
||
val = (buffer[2] << 8) + buffer[3];
|
||
val >>= 12;
|
||
break;
|
||
|
||
case '2':
|
||
val = (buffer[2] << 8) + buffer[3];
|
||
val >>= 6;
|
||
break;
|
||
|
||
case '3':
|
||
case 'j':
|
||
val = (buffer[2] << 8) + buffer[3];
|
||
break;
|
||
|
||
case '4':
|
||
val = (buffer[4] << 8) + buffer[5];
|
||
val >>= 12;
|
||
break;
|
||
|
||
case '5':
|
||
val = (buffer[4] << 8) + buffer[5];
|
||
val >>= 6;
|
||
break;
|
||
|
||
case '6':
|
||
val = (buffer[4] << 8) + buffer[5];
|
||
break;
|
||
|
||
case '7':
|
||
val = (buffer[2] << 8) + buffer[3];
|
||
val >>= 7;
|
||
break;
|
||
|
||
case '8':
|
||
val = (buffer[2] << 8) + buffer[3];
|
||
val >>= 10;
|
||
break;
|
||
|
||
default:
|
||
abort ();
|
||
}
|
||
|
||
switch (bits)
|
||
{
|
||
case 3:
|
||
return val & 7;
|
||
case 4:
|
||
return val & 017;
|
||
case 5:
|
||
return val & 037;
|
||
case 6:
|
||
return val & 077;
|
||
case 7:
|
||
return val & 0177;
|
||
case 8:
|
||
return val & 0377;
|
||
case 12:
|
||
return val & 07777;
|
||
default:
|
||
abort ();
|
||
}
|
||
}
|
||
|
||
/* Print an indexed argument. The base register is BASEREG (-1 for pc).
|
||
P points to extension word, in buffer.
|
||
ADDR is the nominal core address of that extension word. */
|
||
|
||
static unsigned char *
|
||
print_indexed (basereg, p, addr, stream)
|
||
int basereg;
|
||
unsigned char *p;
|
||
CORE_ADDR addr;
|
||
FILE *stream;
|
||
{
|
||
register int word;
|
||
static char *scales[] = {"", "*2", "*4", "*8"};
|
||
register int base_disp;
|
||
register int outer_disp;
|
||
char buf[40];
|
||
|
||
word = NEXTWORD (p);
|
||
|
||
/* Generate the text for the index register.
|
||
Where this will be output is not yet determined. */
|
||
sprintf (buf, "[%s.%c%s]",
|
||
reg_names[(word >> 12) & 0xf],
|
||
(word & 0x800) ? 'l' : 'w',
|
||
scales[(word >> 9) & 3]);
|
||
|
||
/* Handle the 68000 style of indexing. */
|
||
|
||
if ((word & 0x100) == 0)
|
||
{
|
||
print_base (basereg,
|
||
((word & 0x80) ? word | 0xff00 : word & 0xff)
|
||
+ ((basereg == -1) ? addr : 0),
|
||
stream);
|
||
fputs_filtered (buf, stream);
|
||
return p;
|
||
}
|
||
|
||
/* Handle the generalized kind. */
|
||
/* First, compute the displacement to add to the base register. */
|
||
|
||
if (word & 0200)
|
||
basereg = -2;
|
||
if (word & 0100)
|
||
buf[0] = 0;
|
||
base_disp = 0;
|
||
switch ((word >> 4) & 3)
|
||
{
|
||
case 2:
|
||
base_disp = NEXTWORD (p);
|
||
break;
|
||
case 3:
|
||
base_disp = NEXTLONG (p);
|
||
}
|
||
if (basereg == -1)
|
||
base_disp += addr;
|
||
|
||
/* Handle single-level case (not indirect) */
|
||
|
||
if ((word & 7) == 0)
|
||
{
|
||
print_base (basereg, base_disp, stream);
|
||
fputs_filtered (buf, stream);
|
||
return p;
|
||
}
|
||
|
||
/* Two level. Compute displacement to add after indirection. */
|
||
|
||
outer_disp = 0;
|
||
switch (word & 3)
|
||
{
|
||
case 2:
|
||
outer_disp = NEXTWORD (p);
|
||
break;
|
||
case 3:
|
||
outer_disp = NEXTLONG (p);
|
||
}
|
||
|
||
fprintf_filtered (stream, "%d(", outer_disp);
|
||
print_base (basereg, base_disp, stream);
|
||
|
||
/* If postindexed, print the closeparen before the index. */
|
||
if (word & 4)
|
||
fprintf_filtered (stream, ")%s", buf);
|
||
/* If preindexed, print the closeparen after the index. */
|
||
else
|
||
fprintf_filtered (stream, "%s)", buf);
|
||
|
||
return p;
|
||
}
|
||
|
||
/* Print a base register REGNO and displacement DISP, on STREAM.
|
||
REGNO = -1 for pc, -2 for none (suppressed). */
|
||
|
||
static void
|
||
print_base (regno, disp, stream)
|
||
int regno;
|
||
int disp;
|
||
FILE *stream;
|
||
{
|
||
if (regno == -2)
|
||
fprintf_filtered (stream, "%d", disp);
|
||
else if (regno == -1)
|
||
fprintf_filtered (stream, "0x%x", disp);
|
||
else
|
||
fprintf_filtered (stream, "%d(%s)", disp, reg_names[regno]);
|
||
}
|