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. */
+ Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+ MA 02110-1301, USA. */
#include "sysdep.h"
#include "dis-asm.h"
#include "opcode/m68k.h"
-/* Local function prototypes */
-
-static int fetch_data (struct disassemble_info *, bfd_byte *);
-static void dummy_print_address (bfd_vma, struct disassemble_info *);
-static int fetch_arg (unsigned char *, int, int, disassemble_info *);
-static void print_base (int, bfd_vma, disassemble_info *);
-static unsigned char * print_indexed (int, unsigned char *, bfd_vma, disassemble_info *);
-static int print_insn_arg (const char *, unsigned char *, unsigned char *,
- bfd_vma, disassemble_info *);
-static bfd_boolean m68k_valid_ea (char code, int val);
+/* Local function prototypes. */
const char * const fpcr_names[] =
{
- "", "%fpiar", "%fpsr", "%fpiar/%fpsr", "%fpcr",
- "%fpiar/%fpcr", "%fpsr/%fpcr", "%fpiar/%fpsr/%fpcr"
+ "", "%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"
+ "%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",
+ "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%fp", "%sp",
+ "%ps", "%pc"
};
/* Name of register halves for MAC/EMAC.
Seperate from reg_names since 'spu', 'fpl' look weird. */
static char *const reg_half_names[] =
{
- "%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",
- "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%a7",
- "%ps", "%pc"
+ "%d0", "%d1", "%d2", "%d3", "%d4", "%d5", "%d6", "%d7",
+ "%a0", "%a1", "%a2", "%a3", "%a4", "%a5", "%a6", "%a7",
+ "%ps", "%pc"
};
/* Sign-extend an (unsigned char). */
#include <setjmp.h>
-struct private {
+struct private
+{
/* Points to first byte not fetched. */
bfd_byte *max_fetched;
bfd_byte the_buffer[MAXLEN];
return 1;
}
\f
-/* This function is used to print to the bit-bucket. */
+/* This function is used to print to the bit-bucket. */
static int
-#ifdef __STDC__
dummy_printer (FILE *file ATTRIBUTE_UNUSED,
- const char *format ATTRIBUTE_UNUSED, ...)
-#else
-dummy_printer (FILE *file ATTRIBUTE_UNUSED)
-#endif
+ const char *format ATTRIBUTE_UNUSED,
+ ...)
{
return 0;
}
static void
-dummy_print_address (vma, info)
- bfd_vma vma ATTRIBUTE_UNUSED;
- struct disassemble_info *info ATTRIBUTE_UNUSED;
+dummy_print_address (bfd_vma vma ATTRIBUTE_UNUSED,
+ struct disassemble_info *info ATTRIBUTE_UNUSED)
{
}
-/* Try to match the current instruction to best and if so, return the
- number of bytes consumed from the instruction stream, else zero. */
+/* 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
-match_insn_m68k (bfd_vma memaddr, disassemble_info * info,
- const struct m68k_opcode * best, struct private * priv)
+fetch_arg (unsigned char *buffer,
+ int code,
+ int bits,
+ disassemble_info *info)
{
- unsigned char *save_p;
- unsigned char *p;
- const char *d;
-
- bfd_byte *buffer = priv->the_buffer;
- fprintf_ftype save_printer = info->fprintf_func;
- void (* save_print_address) (bfd_vma, struct disassemble_info *)
- = info->print_address_func;
-
- /* Point at first word of argument data,
- and at descriptor for first argument. */
- p = buffer + 2;
+ int val = 0;
- /* 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)
+ switch (code)
{
- /* 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)
- p = buffer + 6;
- else if (p - buffer < 4 && d[1] != 'C' && d[1] != '8')
- p = buffer + 4;
- }
+ case '/': /* MAC/EMAC mask bit. */
+ val = buffer[3] >> 5;
+ break;
- if ((d[0] == 'L' || d[0] == 'l') && d[1] == 'w' && p - buffer < 4)
- p = buffer + 4;
+ case 'G': /* EMAC ACC load. */
+ val = ((buffer[3] >> 3) & 0x2) | ((~buffer[1] >> 7) & 0x1);
+ break;
- 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;
- }
- }
+ case 'H': /* EMAC ACC !load. */
+ val = ((buffer[3] >> 3) & 0x2) | ((buffer[1] >> 7) & 0x1);
+ break;
- /* pflusha is an exceptions. It takes no arguments but is two words
- long. Recognize it by looking at the lower 16 bits of the mask. */
- if (p - buffer < 4 && (best->match & 0xFFFF) != 0)
- p = buffer + 4;
+ case ']': /* EMAC ACCEXT bit. */
+ val = buffer[0] >> 2;
+ break;
- /* lpstop is another exception. It takes a one word argument but is
- three words long. */
- if (p - buffer < 6
- && (best->match & 0xffff) == 0xffff
- && best->args[0] == '#'
- && best->args[1] == 'w')
- {
- /* Copy the one word argument into the usual location for a one
- word argument, to simplify printing it. We can get away with
- this because we know exactly what the second word is, and we
- aren't going to print anything based on it. */
- p = buffer + 6;
- FETCH_DATA (info, p);
- buffer[2] = buffer[4];
- buffer[3] = buffer[5];
- }
+ case 'I': /* MAC/EMAC scale factor. */
+ val = buffer[2] >> 1;
+ break;
- FETCH_DATA (info, p);
+ case 'F': /* EMAC ACCx. */
+ val = buffer[0] >> 1;
+ break;
- d = best->args;
+ case 'f':
+ val = buffer[1];
+ break;
- save_p = p;
- info->print_address_func = dummy_print_address;
- info->fprintf_func = (fprintf_ftype) dummy_printer;
+ case 's':
+ val = buffer[1];
+ break;
- /* We scan the operands twice. The first time we don't print anything,
- but look for errors. */
- for (; *d; d += 2)
- {
- int eaten = print_insn_arg (d, buffer, p, memaddr + (p - buffer), info);
+ case 'd': /* Destination, for register or quick. */
+ val = (buffer[0] << 8) + buffer[1];
+ val >>= 9;
+ break;
- if (eaten >= 0)
- p += eaten;
- else if (eaten == -1)
- {
- info->fprintf_func = save_printer;
- info->print_address_func = save_print_address;
- return 0;
- }
- else
- {
- info->fprintf_func (info->stream,
- /* xgettext:c-format */
- _("<internal error in opcode table: %s %s>\n"),
- best->name, best->args);
- info->fprintf_func = save_printer;
- info->print_address_func = save_print_address;
- return 2;
- }
- }
+ case 'x': /* Destination, for general arg. */
+ val = (buffer[0] << 8) + buffer[1];
+ val >>= 6;
+ break;
- p = save_p;
- info->fprintf_func = save_printer;
- info->print_address_func = save_print_address;
+ case 'k':
+ FETCH_DATA (info, buffer + 3);
+ val = (buffer[3] >> 4);
+ break;
- d = best->args;
+ case 'C':
+ FETCH_DATA (info, buffer + 3);
+ val = buffer[3];
+ break;
- info->fprintf_func (info->stream, "%s", best->name);
+ case '1':
+ FETCH_DATA (info, buffer + 3);
+ val = (buffer[2] << 8) + buffer[3];
+ val >>= 12;
+ break;
- if (*d)
- info->fprintf_func (info->stream, " ");
+ case '2':
+ FETCH_DATA (info, buffer + 3);
+ val = (buffer[2] << 8) + buffer[3];
+ val >>= 6;
+ break;
- while (*d)
- {
- p += print_insn_arg (d, buffer, p, memaddr + (p - buffer), info);
- d += 2;
+ case '3':
+ case 'j':
+ FETCH_DATA (info, buffer + 3);
+ val = (buffer[2] << 8) + buffer[3];
+ break;
- if (*d && *(d - 2) != 'I' && *d != 'k')
- info->fprintf_func (info->stream, ",");
- }
+ case '4':
+ FETCH_DATA (info, buffer + 5);
+ val = (buffer[4] << 8) + buffer[5];
+ val >>= 12;
+ break;
- return p - buffer;
-}
+ case '5':
+ FETCH_DATA (info, buffer + 5);
+ val = (buffer[4] << 8) + buffer[5];
+ val >>= 6;
+ break;
-/* Print the m68k instruction at address MEMADDR in debugged memory,
- on INFO->STREAM. Returns length of the instruction, in bytes. */
+ case '6':
+ FETCH_DATA (info, buffer + 5);
+ val = (buffer[4] << 8) + buffer[5];
+ break;
-int
-print_insn_m68k (bfd_vma memaddr, disassemble_info *info)
-{
- int i;
- const char *d;
- unsigned int arch_mask;
- struct private priv;
- bfd_byte *buffer = priv.the_buffer;
- int major_opcode;
- static int numopcodes[16];
- static const struct m68k_opcode **opcodes[16];
- int val;
+ case '7':
+ FETCH_DATA (info, buffer + 3);
+ val = (buffer[2] << 8) + buffer[3];
+ val >>= 7;
+ break;
- if (!opcodes[0])
- {
- /* Speed up the matching by sorting the opcode
- table on the upper four bits of the opcode. */
- const struct m68k_opcode **opc_pointer[16];
+ case '8':
+ FETCH_DATA (info, buffer + 3);
+ val = (buffer[2] << 8) + buffer[3];
+ val >>= 10;
+ break;
- /* First count how many opcodes are in each of the sixteen buckets. */
- for (i = 0; i < m68k_numopcodes; i++)
- numopcodes[(m68k_opcodes[i].opcode >> 28) & 15]++;
+ case '9':
+ FETCH_DATA (info, buffer + 3);
+ val = (buffer[2] << 8) + buffer[3];
+ val >>= 5;
+ break;
- /* Then create a sorted table of pointers
- that point into the unsorted table. */
- opc_pointer[0] = xmalloc (sizeof (struct m68k_opcode *)
- * m68k_numopcodes);
- opcodes[0] = opc_pointer[0];
+ case 'e':
+ val = (buffer[1] >> 6);
+ break;
- for (i = 1; i < 16; i++)
- {
- opc_pointer[i] = opc_pointer[i - 1] + numopcodes[i - 1];
- opcodes[i] = opc_pointer[i];
- }
+ case 'm':
+ val = (buffer[1] & 0x40 ? 0x8 : 0)
+ | ((buffer[0] >> 1) & 0x7)
+ | (buffer[3] & 0x80 ? 0x10 : 0);
+ break;
- for (i = 0; i < m68k_numopcodes; i++)
- *opc_pointer[(m68k_opcodes[i].opcode >> 28) & 15]++ = &m68k_opcodes[i];
- }
+ case 'n':
+ val = (buffer[1] & 0x40 ? 0x8 : 0) | ((buffer[0] >> 1) & 0x7);
+ break;
- info->private_data = (PTR) &priv;
- /* Tell objdump to use two bytes per chunk
- and six bytes per line for displaying raw data. */
- info->bytes_per_chunk = 2;
- info->bytes_per_line = 6;
- info->display_endian = BFD_ENDIAN_BIG;
- priv.max_fetched = priv.the_buffer;
- priv.insn_start = memaddr;
+ case 'o':
+ val = (buffer[2] >> 4) | (buffer[3] & 0x80 ? 0x10 : 0);
+ break;
- if (setjmp (priv.bailout) != 0)
- /* Error return. */
- return -1;
+ case 'M':
+ val = (buffer[1] & 0xf) | (buffer[3] & 0x40 ? 0x10 : 0);
+ break;
- switch (info->mach)
+ case 'N':
+ val = (buffer[3] & 0xf) | (buffer[3] & 0x40 ? 0x10 : 0);
+ break;
+
+ case 'h':
+ val = buffer[2] >> 2;
+ break;
+
+ default:
+ abort ();
+ }
+
+ switch (bits)
{
+ case 1:
+ return val & 1;
+ case 2:
+ return val & 3;
+ 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:
- case 0:
- arch_mask = (unsigned int) -1;
+ abort ();
+ }
+}
+
+/* Check if an EA is valid for a particular code. This is required
+ for the EMAC instructions since the type of source address determines
+ if it is a EMAC-load instruciton if the EA is mode 2-5, otherwise it
+ is a non-load EMAC instruction and the bits mean register Ry.
+ A similar case exists for the movem instructions where the register
+ mask is interpreted differently for different EAs. */
+
+static bfd_boolean
+m68k_valid_ea (char code, int val)
+{
+ int mode, mask;
+#define M(n0,n1,n2,n3,n4,n5,n6,n70,n71,n72,n73,n74) \
+ (n0 | n1 << 1 | n2 << 2 | n3 << 3 | n4 << 4 | n5 << 5 | n6 << 6 \
+ | n70 << 7 | n71 << 8 | n72 << 9 | n73 << 10 | n74 << 11)
+
+ switch (code)
+ {
+ case '*':
+ mask = M (1,1,1,1,1,1,1,1,1,1,1,1);
break;
- case bfd_mach_m68000:
- arch_mask = m68000|m68881|m68851;
+ case '~':
+ mask = M (0,0,1,1,1,1,1,1,1,0,0,0);
break;
- case bfd_mach_m68008:
- arch_mask = m68008|m68881|m68851;
+ case '%':
+ mask = M (1,1,1,1,1,1,1,1,1,0,0,0);
break;
- case bfd_mach_m68010:
- arch_mask = m68010|m68881|m68851;
+ case ';':
+ mask = M (1,0,1,1,1,1,1,1,1,1,1,1);
break;
- case bfd_mach_m68020:
- arch_mask = m68020|m68881|m68851;
+ case '@':
+ mask = M (1,0,1,1,1,1,1,1,1,1,1,0);
break;
- case bfd_mach_m68030:
- arch_mask = m68030|m68881|m68851;
+ case '!':
+ mask = M (0,0,1,0,0,1,1,1,1,1,1,0);
break;
- case bfd_mach_m68040:
- arch_mask = m68040|m68881|m68851;
+ case '&':
+ mask = M (0,0,1,0,0,1,1,1,1,0,0,0);
break;
- case bfd_mach_m68060:
- arch_mask = m68060|m68881|m68851;
+ case '$':
+ mask = M (1,0,1,1,1,1,1,1,1,0,0,0);
break;
- case bfd_mach_mcf5200:
- arch_mask = mcfisa_a;
+ case '?':
+ mask = M (1,0,1,0,0,1,1,1,1,0,0,0);
break;
- case bfd_mach_mcf521x:
- case bfd_mach_mcf528x:
- arch_mask = mcfisa_a|mcfhwdiv|mcfisa_aa|mcfusp|mcfemac;
+ case '/':
+ mask = M (1,0,1,0,0,1,1,1,1,1,1,0);
break;
- case bfd_mach_mcf5206e:
- arch_mask = mcfisa_a|mcfhwdiv|mcfmac;
+ case '|':
+ mask = M (0,0,1,0,0,1,1,1,1,1,1,0);
break;
- case bfd_mach_mcf5249:
- arch_mask = mcfisa_a|mcfhwdiv|mcfemac;
+ case '>':
+ mask = M (0,0,1,0,1,1,1,1,1,0,0,0);
break;
- case bfd_mach_mcf5307:
- arch_mask = mcfisa_a|mcfhwdiv|mcfmac;
+ case '<':
+ mask = M (0,0,1,1,0,1,1,1,1,1,1,0);
break;
- case bfd_mach_mcf5407:
- arch_mask = mcfisa_a|mcfhwdiv|mcfisa_b|mcfmac;
+ case 'm':
+ mask = M (1,1,1,1,1,0,0,0,0,0,0,0);
break;
- case bfd_mach_mcf547x:
- case bfd_mach_mcf548x:
- case bfd_mach_mcfv4e:
- arch_mask = mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfemac;
+ case 'n':
+ mask = M (0,0,0,0,0,1,0,0,0,1,0,0);
+ break;
+ case 'o':
+ mask = M (0,0,0,0,0,0,1,1,1,0,1,1);
+ break;
+ case 'p':
+ mask = M (1,1,1,1,1,1,0,0,0,0,0,0);
+ break;
+ case 'q':
+ mask = M (1,0,1,1,1,1,0,0,0,0,0,0);
+ break;
+ case 'v':
+ mask = M (1,0,1,1,1,1,0,1,1,0,0,0);
+ break;
+ case 'b':
+ mask = M (1,0,1,1,1,1,0,0,0,1,0,0);
+ break;
+ case 'w':
+ mask = M (0,0,1,1,1,1,0,0,0,1,0,0);
+ break;
+ case 'y':
+ mask = M (0,0,1,0,0,1,0,0,0,0,0,0);
+ break;
+ case 'z':
+ mask = M (0,0,1,0,0,1,0,0,0,1,0,0);
+ break;
+ case '4':
+ mask = M (0,0,1,1,1,1,0,0,0,0,0,0);
break;
+ default:
+ abort ();
}
+#undef M
- FETCH_DATA (info, buffer + 2);
- major_opcode = (buffer[0] >> 4) & 15;
-
- for (i = 0; i < numopcodes[major_opcode]; i++)
- {
- const struct m68k_opcode *opc = opcodes[major_opcode][i];
- unsigned long opcode = opc->opcode;
- unsigned long match = opc->match;
+ mode = (val >> 3) & 7;
+ if (mode == 7)
+ mode += val & 7;
+ return (mask & (1 << mode)) != 0;
+}
- 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. */
- && (((0xffff & match) == 0)
- ||
- (FETCH_DATA (info, buffer + 4)
- && ((0xff & buffer[2] & (match >> 8)) == (0xff & (opcode >> 8)))
- && ((0xff & buffer[3] & match) == (0xff & opcode)))
- )
- && (opc->arch & arch_mask) != 0)
- {
- /* 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 = opc->args; *d; d += 2)
- if (d[1] == 'D')
- break;
+/* Print a base register REGNO and displacement DISP, on INFO->STREAM.
+ REGNO = -1 for pc, -2 for none (suppressed). */
- /* 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 = opc->args; *d; d += 2)
- if (d[1] == 't')
- break;
+static void
+print_base (int regno, bfd_vma disp, disassemble_info *info)
+{
+ if (regno == -1)
+ {
+ (*info->fprintf_func) (info->stream, "%%pc@(");
+ (*info->print_address_func) (disp, info);
+ }
+ else
+ {
+ char buf[50];
- /* Don't match fmovel with more than one register;
- wait for fmoveml. */
- if (*d == '\0')
- {
- for (d = opc->args; *d; d += 2)
- {
- if (d[0] == 's' && d[1] == '8')
- {
- val = fetch_arg (buffer, d[1], 3, info);
- if ((val & (val - 1)) != 0)
- break;
- }
- }
- }
+ 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]);
- if (*d == '\0')
- if ((val = match_insn_m68k (memaddr, info, opc, & priv)))
- return val;
- }
+ sprintf_vma (buf, disp);
+ (*info->fprintf_func) (info->stream, "%s", buf);
}
-
- /* Handle undefined instructions. */
- info->fprintf_func (info->stream, "0%o", (buffer[0] << 8) + buffer[1]);
- return 2;
}
-/* 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. */
-
-/* ADDR is the pc for this arg to be relative to. */
+/* 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 int
-print_insn_arg (const char *d, unsigned char *buffer,
- unsigned char *p0, bfd_vma addr,
- disassemble_info *info)
+static unsigned char *
+print_indexed (int basereg,
+ unsigned char *p,
+ bfd_vma addr,
+ disassemble_info *info)
{
- int val = 0;
- int place = d[1];
- unsigned char *p = p0;
- int regno;
+ int word;
+ 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",
+ reg_names[(word >> 12) & 0xf],
+ (word & 0x800) ? 'l' : 'w',
+ scales[(word >> 9) & 3]);
+
+ /* Handle the 68000 style of indexing. */
+
+ if ((word & 0x100) == 0)
+ {
+ base_disp = word & 0xff;
+ if ((base_disp & 0x80) != 0)
+ base_disp -= 0x100;
+ if (basereg == -1)
+ base_disp += addr;
+ print_base (basereg, base_disp, info);
+ (*info->fprintf_func) (info->stream, ",%s)", buf);
+ return p;
+ }
+
+ /* Handle the generalized kind. */
+ /* First, compute the displacement to add to the base register. */
+ if (word & 0200)
+ {
+ if (basereg == -1)
+ basereg = -3;
+ else
+ 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, info);
+ if (buf[0] != '\0')
+ (*info->fprintf_func) (info->stream, ",%s", buf);
+ (*info->fprintf_func) (info->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);
+ }
+
+ print_base (basereg, base_disp, info);
+ 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;
+}
+
+/* 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.
+ ADDR is the pc for this arg to be relative to. */
+
+static int
+print_insn_arg (const char *d,
+ unsigned char *buffer,
+ unsigned char *p0,
+ bfd_vma addr,
+ disassemble_info *info)
+{
+ int val = 0;
+ int place = d[1];
+ unsigned char *p = p0;
+ int regno;
const char *regname;
unsigned char *p1;
double flval;
else if (place == 'C')
{
val = fetch_arg (buffer, place, 7, info);
- if (val > 63) /* This is a signed constant. */
+ if (val > 63) /* This is a signed constant. */
val -= 128;
(*info->fprintf_func) (info->stream, "{#%d}", val);
}
}
else if (place == 'c')
{
- if (buffer[1] & 0x40) /* If bit six is one, long offset */
+ if (buffer[1] & 0x40) /* If bit six is one, long offset. */
disp = NEXTLONG (p);
else
disp = NEXTWORD (p);
val = fetch_arg(buffer, place, 1, info);
(*info->fprintf_func) (info->stream, "%%accext%s", val==0 ? "01" : "23");
break;
-
+
case 'i':
val = fetch_arg(buffer, place, 2, info);
if (val == 1)
/* Get coprocessor ID... */
val = fetch_arg (buffer, 'd', 3, info);
- if (val != 1) /* Unusual coprocessor ID? */
+ if (val != 1) /* Unusual coprocessor ID? */
(*info->fprintf_func) (info->stream, "(cpid=%d) ", val);
break;
}
if (*d == 'l')
{
- register int newval = 0;
+ int newval = 0;
+
for (regno = 0; regno < 16; ++regno)
if (val & (0x8000 >> regno))
newval |= 1 << regno;
if (val & (1 << regno))
{
int first_regno;
+
if (doneany)
(*info->fprintf_func) (info->stream, "/");
doneany = 1;
}
if (*d == 'l')
{
- register int newval = 0;
+ int newval = 0;
+
for (regno = 0; regno < 8; ++regno)
if (val & (0x80 >> regno))
newval |= 1 << regno;
}
else if (place == '8')
{
- /* fmoveml for FP status registers */
+ /* fmoveml for FP status registers. */
(*info->fprintf_func) (info->stream, "%s",
fpcr_names[fetch_arg (buffer, place, 3,
info)]);
{
int val = fetch_arg (buffer, place, 5, info);
char *name = 0;
+
switch (val)
{
case 2: name = "%tt0"; break;
case 0x1d:
{
int break_reg = ((buffer[3] >> 2) & 7);
+
(*info->fprintf_func)
(info->stream, val == 0x1c ? "%%bad%d" : "%%bac%d",
break_reg);
case 'f':
{
int fc = fetch_arg (buffer, place, 5, info);
+
if (fc == 1)
(*info->fprintf_func) (info->stream, "%%dfc");
else if (fc == 0)
case 't':
{
int level = fetch_arg (buffer, place, 3, info);
+
(*info->fprintf_func) (info->stream, "%d", level);
}
break;
return p - p0;
}
-/* Check if an EA is valid for a particular code. This is required
- for the EMAC instructions since the type of source address determines
- if it is a EMAC-load instruciton if the EA is mode 2-5, otherwise it
- is a non-load EMAC instruction and the bits mean register Ry.
- A similar case exists for the movem instructions where the register
- mask is interpreted differently for different EAs. */
-
-static bfd_boolean
-m68k_valid_ea (char code, int val)
-{
- int mode, mask;
-#define M(n0,n1,n2,n3,n4,n5,n6,n70,n71,n72,n73,n74) \
- (n0 | n1 << 1 | n2 << 2 | n3 << 3 | n4 << 4 | n5 << 5 | n6 << 6 \
- | n70 << 7 | n71 << 8 | n72 << 9 | n73 << 10 | n74 << 11)
-
- switch (code)
- {
- case '*':
- mask = M (1,1,1,1,1,1,1,1,1,1,1,1);
- break;
- case '~':
- mask = M (0,0,1,1,1,1,1,1,1,0,0,0);
- break;
- case '%':
- mask = M (1,1,1,1,1,1,1,1,1,0,0,0);
- break;
- case ';':
- mask = M (1,0,1,1,1,1,1,1,1,1,1,1);
- break;
- case '@':
- mask = M (1,0,1,1,1,1,1,1,1,1,1,0);
- break;
- case '!':
- mask = M (0,0,1,0,0,1,1,1,1,1,1,0);
- break;
- case '&':
- mask = M (0,0,1,0,0,1,1,1,1,0,0,0);
- break;
- case '$':
- mask = M (1,0,1,1,1,1,1,1,1,0,0,0);
- break;
- case '?':
- mask = M (1,0,1,0,0,1,1,1,1,0,0,0);
- break;
- case '/':
- mask = M (1,0,1,0,0,1,1,1,1,1,1,0);
- break;
- case '|':
- mask = M (0,0,1,0,0,1,1,1,1,1,1,0);
- break;
- case '>':
- mask = M (0,0,1,0,1,1,1,1,1,0,0,0);
- break;
- case '<':
- mask = M (0,0,1,1,0,1,1,1,1,1,1,0);
- break;
- case 'm':
- mask = M (1,1,1,1,1,0,0,0,0,0,0,0);
- break;
- case 'n':
- mask = M (0,0,0,0,0,1,0,0,0,1,0,0);
- break;
- case 'o':
- mask = M (0,0,0,0,0,0,1,1,1,0,1,1);
- break;
- case 'p':
- mask = M (1,1,1,1,1,1,0,0,0,0,0,0);
- break;
- case 'q':
- mask = M (1,0,1,1,1,1,0,0,0,0,0,0);
- break;
- case 'v':
- mask = M (1,0,1,1,1,1,0,1,1,0,0,0);
- break;
- case 'b':
- mask = M (1,0,1,1,1,1,0,0,0,1,0,0);
- break;
- case 'w':
- mask = M (0,0,1,1,1,1,0,0,0,1,0,0);
- break;
- case 'y':
- mask = M (0,0,1,0,0,1,0,0,0,0,0,0);
- break;
- case 'z':
- mask = M (0,0,1,0,0,1,0,0,0,1,0,0);
- break;
- case '4':
- mask = M (0,0,1,1,1,1,0,0,0,0,0,0);
- break;
- default:
- abort ();
- }
-#undef M
-
- mode = (val >> 3) & 7;
- if (mode == 7)
- mode += val & 7;
- return (mask & (1 << mode)) != 0;
-}
-
-/* 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. */
+/* Try to match the current instruction to best and if so, return the
+ number of bytes consumed from the instruction stream, else zero. */
static int
-fetch_arg (unsigned char *buffer, int code, int bits,
- disassemble_info *info)
+match_insn_m68k (bfd_vma memaddr,
+ disassemble_info * info,
+ const struct m68k_opcode * best,
+ struct private * priv)
{
- int val = 0;
+ unsigned char *save_p;
+ unsigned char *p;
+ const char *d;
- switch (code)
- {
- case '/': /* MAC/EMAC mask bit. */
- val = buffer[3] >> 5;
- break;
+ bfd_byte *buffer = priv->the_buffer;
+ fprintf_ftype save_printer = info->fprintf_func;
+ void (* save_print_address) (bfd_vma, struct disassemble_info *)
+ = info->print_address_func;
- case 'G': /* EMAC ACC load. */
- val = ((buffer[3] >> 3) & 0x2) | ((~buffer[1] >> 7) & 0x1);
- break;
+ /* Point at first word of argument data,
+ and at descriptor for first argument. */
+ p = buffer + 2;
- case 'H': /* EMAC ACC !load. */
- val = ((buffer[3] >> 3) & 0x2) | ((buffer[1] >> 7) & 0x1);
- break;
+ /* 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)
+ p = buffer + 6;
+ else if (p - buffer < 4 && d[1] != 'C' && d[1] != '8')
+ p = buffer + 4;
+ }
- case ']': /* EMAC ACCEXT bit. */
- val = buffer[0] >> 2;
- break;
+ if ((d[0] == 'L' || d[0] == 'l') && d[1] == 'w' && p - buffer < 4)
+ p = buffer + 4;
- case 'I': /* MAC/EMAC scale factor. */
- val = buffer[2] >> 1;
- break;
-
- case 'F': /* EMAC ACCx. */
- val = buffer[0] >> 1;
- break;
-
- case 'f':
- val = buffer[1];
- break;
-
- 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':
- FETCH_DATA (info, buffer + 3);
- val = (buffer[3] >> 4);
- break;
-
- case 'C':
- FETCH_DATA (info, buffer + 3);
- val = buffer[3];
- break;
-
- case '1':
- FETCH_DATA (info, buffer + 3);
- val = (buffer[2] << 8) + buffer[3];
- val >>= 12;
- break;
-
- case '2':
- FETCH_DATA (info, buffer + 3);
- val = (buffer[2] << 8) + buffer[3];
- val >>= 6;
- break;
-
- case '3':
- case 'j':
- FETCH_DATA (info, buffer + 3);
- val = (buffer[2] << 8) + buffer[3];
- break;
-
- case '4':
- FETCH_DATA (info, buffer + 5);
- val = (buffer[4] << 8) + buffer[5];
- val >>= 12;
- break;
+ 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;
+ }
+ }
- case '5':
- FETCH_DATA (info, buffer + 5);
- val = (buffer[4] << 8) + buffer[5];
- val >>= 6;
- break;
+ /* pflusha is an exceptions. It takes no arguments but is two words
+ long. Recognize it by looking at the lower 16 bits of the mask. */
+ if (p - buffer < 4 && (best->match & 0xFFFF) != 0)
+ p = buffer + 4;
- case '6':
- FETCH_DATA (info, buffer + 5);
- val = (buffer[4] << 8) + buffer[5];
- break;
+ /* lpstop is another exception. It takes a one word argument but is
+ three words long. */
+ if (p - buffer < 6
+ && (best->match & 0xffff) == 0xffff
+ && best->args[0] == '#'
+ && best->args[1] == 'w')
+ {
+ /* Copy the one word argument into the usual location for a one
+ word argument, to simplify printing it. We can get away with
+ this because we know exactly what the second word is, and we
+ aren't going to print anything based on it. */
+ p = buffer + 6;
+ FETCH_DATA (info, p);
+ buffer[2] = buffer[4];
+ buffer[3] = buffer[5];
+ }
- case '7':
- FETCH_DATA (info, buffer + 3);
- val = (buffer[2] << 8) + buffer[3];
- val >>= 7;
- break;
+ FETCH_DATA (info, p);
- case '8':
- FETCH_DATA (info, buffer + 3);
- val = (buffer[2] << 8) + buffer[3];
- val >>= 10;
- break;
+ d = best->args;
- case '9':
- FETCH_DATA (info, buffer + 3);
- val = (buffer[2] << 8) + buffer[3];
- val >>= 5;
- break;
+ save_p = p;
+ info->print_address_func = dummy_print_address;
+ info->fprintf_func = (fprintf_ftype) dummy_printer;
- case 'e':
- val = (buffer[1] >> 6);
- break;
+ /* We scan the operands twice. The first time we don't print anything,
+ but look for errors. */
+ for (; *d; d += 2)
+ {
+ int eaten = print_insn_arg (d, buffer, p, memaddr + (p - buffer), info);
- case 'm':
- val = (buffer[1] & 0x40 ? 0x8 : 0)
- | ((buffer[0] >> 1) & 0x7)
- | (buffer[3] & 0x80 ? 0x10 : 0);
- break;
+ if (eaten >= 0)
+ p += eaten;
+ else if (eaten == -1)
+ {
+ info->fprintf_func = save_printer;
+ info->print_address_func = save_print_address;
+ return 0;
+ }
+ else
+ {
+ info->fprintf_func (info->stream,
+ /* xgettext:c-format */
+ _("<internal error in opcode table: %s %s>\n"),
+ best->name, best->args);
+ info->fprintf_func = save_printer;
+ info->print_address_func = save_print_address;
+ return 2;
+ }
+ }
- case 'n':
- val = (buffer[1] & 0x40 ? 0x8 : 0) | ((buffer[0] >> 1) & 0x7);
- break;
+ p = save_p;
+ info->fprintf_func = save_printer;
+ info->print_address_func = save_print_address;
- case 'o':
- val = (buffer[2] >> 4) | (buffer[3] & 0x80 ? 0x10 : 0);
- break;
+ d = best->args;
- case 'M':
- val = (buffer[1] & 0xf) | (buffer[3] & 0x40 ? 0x10 : 0);
- break;
+ info->fprintf_func (info->stream, "%s", best->name);
- case 'N':
- val = (buffer[3] & 0xf) | (buffer[3] & 0x40 ? 0x10 : 0);
- break;
+ if (*d)
+ info->fprintf_func (info->stream, " ");
- case 'h':
- val = buffer[2] >> 2;
- break;
+ while (*d)
+ {
+ p += print_insn_arg (d, buffer, p, memaddr + (p - buffer), info);
+ d += 2;
- default:
- abort ();
+ if (*d && *(d - 2) != 'I' && *d != 'k')
+ info->fprintf_func (info->stream, ",");
}
- switch (bits)
- {
- case 1:
- return val & 1;
- case 2:
- return val & 3;
- 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 ();
- }
+ return p - buffer;
}
-/* 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. */
+/* Print the m68k instruction at address MEMADDR in debugged memory,
+ on INFO->STREAM. Returns length of the instruction, in bytes. */
-static unsigned char *
-print_indexed (int basereg, unsigned char *p,
- bfd_vma addr, disassemble_info *info)
+int
+print_insn_m68k (bfd_vma memaddr, disassemble_info *info)
{
- int word;
- 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",
- reg_names[(word >> 12) & 0xf],
- (word & 0x800) ? 'l' : 'w',
- scales[(word >> 9) & 3]);
-
- /* Handle the 68000 style of indexing. */
+ int i;
+ const char *d;
+ unsigned int arch_mask;
+ struct private priv;
+ bfd_byte *buffer = priv.the_buffer;
+ int major_opcode;
+ static int numopcodes[16];
+ static const struct m68k_opcode **opcodes[16];
+ int val;
- if ((word & 0x100) == 0)
+ if (!opcodes[0])
{
- base_disp = word & 0xff;
- if ((base_disp & 0x80) != 0)
- base_disp -= 0x100;
- if (basereg == -1)
- base_disp += addr;
- print_base (basereg, base_disp, info);
- (*info->fprintf_func) (info->stream, ",%s)", buf);
- return p;
- }
+ /* Speed up the matching by sorting the opcode
+ table on the upper four bits of the opcode. */
+ const struct m68k_opcode **opc_pointer[16];
- /* Handle the generalized kind. */
- /* First, compute the displacement to add to the base register. */
+ /* First count how many opcodes are in each of the sixteen buckets. */
+ for (i = 0; i < m68k_numopcodes; i++)
+ numopcodes[(m68k_opcodes[i].opcode >> 28) & 15]++;
- if (word & 0200)
- {
- if (basereg == -1)
- basereg = -3;
- else
- 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;
+ /* Then create a sorted table of pointers
+ that point into the unsorted table. */
+ opc_pointer[0] = xmalloc (sizeof (struct m68k_opcode *)
+ * m68k_numopcodes);
+ opcodes[0] = opc_pointer[0];
- /* Handle single-level case (not indirect) */
+ for (i = 1; i < 16; i++)
+ {
+ opc_pointer[i] = opc_pointer[i - 1] + numopcodes[i - 1];
+ opcodes[i] = opc_pointer[i];
+ }
- if ((word & 7) == 0)
- {
- print_base (basereg, base_disp, info);
- if (buf[0] != '\0')
- (*info->fprintf_func) (info->stream, ",%s", buf);
- (*info->fprintf_func) (info->stream, ")");
- return p;
+ for (i = 0; i < m68k_numopcodes; i++)
+ *opc_pointer[(m68k_opcodes[i].opcode >> 28) & 15]++ = &m68k_opcodes[i];
}
- /* Two level. Compute displacement to add after indirection. */
+ info->private_data = (PTR) &priv;
+ /* Tell objdump to use two bytes per chunk
+ and six bytes per line for displaying raw data. */
+ info->bytes_per_chunk = 2;
+ info->bytes_per_line = 6;
+ info->display_endian = BFD_ENDIAN_BIG;
+ priv.max_fetched = priv.the_buffer;
+ priv.insn_start = memaddr;
- outer_disp = 0;
- switch (word & 3)
+ if (setjmp (priv.bailout) != 0)
+ /* Error return. */
+ return -1;
+
+ switch (info->mach)
{
- case 2:
- outer_disp = NEXTWORD (p);
+ default:
+ case 0:
+ arch_mask = (unsigned int) -1;
+ break;
+ case bfd_mach_m68000:
+ arch_mask = m68000|m68881|m68851;
+ break;
+ case bfd_mach_m68008:
+ arch_mask = m68008|m68881|m68851;
+ break;
+ case bfd_mach_m68010:
+ arch_mask = m68010|m68881|m68851;
+ break;
+ case bfd_mach_m68020:
+ arch_mask = m68020|m68881|m68851;
+ break;
+ case bfd_mach_m68030:
+ arch_mask = m68030|m68881|m68851;
+ break;
+ case bfd_mach_m68040:
+ arch_mask = m68040|m68881|m68851;
+ break;
+ case bfd_mach_m68060:
+ arch_mask = m68060|m68881|m68851;
+ break;
+ case bfd_mach_mcf5200:
+ arch_mask = mcfisa_a;
+ break;
+ case bfd_mach_mcf521x:
+ case bfd_mach_mcf528x:
+ arch_mask = mcfisa_a|mcfhwdiv|mcfisa_aa|mcfusp|mcfemac;
+ break;
+ case bfd_mach_mcf5206e:
+ arch_mask = mcfisa_a|mcfhwdiv|mcfmac;
+ break;
+ case bfd_mach_mcf5249:
+ arch_mask = mcfisa_a|mcfhwdiv|mcfemac;
+ break;
+ case bfd_mach_mcf5307:
+ arch_mask = mcfisa_a|mcfhwdiv|mcfmac;
+ break;
+ case bfd_mach_mcf5407:
+ arch_mask = mcfisa_a|mcfhwdiv|mcfisa_b|mcfmac;
+ break;
+ case bfd_mach_mcf547x:
+ case bfd_mach_mcf548x:
+ case bfd_mach_mcfv4e:
+ arch_mask = mcfisa_a|mcfhwdiv|mcfisa_b|mcfusp|cfloat|mcfemac;
break;
- case 3:
- outer_disp = NEXTLONG (p);
}
- print_base (basereg, base_disp, info);
- 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, ")");
+ FETCH_DATA (info, buffer + 2);
+ major_opcode = (buffer[0] >> 4) & 15;
- return p;
-}
+ for (i = 0; i < numopcodes[major_opcode]; i++)
+ {
+ const struct m68k_opcode *opc = opcodes[major_opcode][i];
+ unsigned long opcode = opc->opcode;
+ unsigned long match = opc->match;
-/* Print a base register REGNO and displacement DISP, on INFO->STREAM.
- REGNO = -1 for pc, -2 for none (suppressed). */
+ 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. */
+ && (((0xffff & match) == 0)
+ ||
+ (FETCH_DATA (info, buffer + 4)
+ && ((0xff & buffer[2] & (match >> 8)) == (0xff & (opcode >> 8)))
+ && ((0xff & buffer[3] & match) == (0xff & opcode)))
+ )
+ && (opc->arch & arch_mask) != 0)
+ {
+ /* 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 = opc->args; *d; d += 2)
+ if (d[1] == 'D')
+ break;
-static void
-print_base (int regno, bfd_vma disp, disassemble_info *info)
-{
- if (regno == -1)
- {
- (*info->fprintf_func) (info->stream, "%%pc@(");
- (*info->print_address_func) (disp, info);
- }
- else
- {
- char buf[50];
+ /* 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 = opc->args; *d; d += 2)
+ if (d[1] == 't')
+ break;
- 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]);
+ /* Don't match fmovel with more than one register;
+ wait for fmoveml. */
+ if (*d == '\0')
+ {
+ for (d = opc->args; *d; d += 2)
+ {
+ if (d[0] == 's' && d[1] == '8')
+ {
+ val = fetch_arg (buffer, d[1], 3, info);
+ if ((val & (val - 1)) != 0)
+ break;
+ }
+ }
+ }
- sprintf_vma (buf, disp);
- (*info->fprintf_func) (info->stream, "%s", buf);
+ if (*d == '\0')
+ if ((val = match_insn_m68k (memaddr, info, opc, & priv)))
+ return val;
+ }
}
+
+ /* Handle undefined instructions. */
+ info->fprintf_func (info->stream, "0%o", (buffer[0] << 8) + buffer[1]);
+ return 2;
}
OSDN Git Service
