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- /* Print Motorola 68k instructions.
- Copyright (C) 1986-2022 Free Software Foundation, Inc.
- 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 3, or (at your option)
- any later version.
- 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 "disassemble.h"
- #include "floatformat.h"
- #include "libiberty.h"
- #include "opintl.h"
- #include "cpu-m68k.h"
- #include "opcode/m68k.h"
- /* Local function prototypes. */
- 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"
- };
- /* 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"
- };
- /* Sign-extend an (unsigned char). */
- #if __STDC__ == 1
- #define COERCE_SIGNED_CHAR(ch) ((signed char) (ch))
- #else
- #define COERCE_SIGNED_CHAR(ch) ((int) (((ch) ^ 0x80) & 0xFF) - 128)
- #endif
- /* Error code of print_insn_arg's return value. */
- enum print_insn_arg_error
- {
- /* An invalid operand is found. */
- PRINT_INSN_ARG_INVALID_OPERAND = -1,
- /* An opcode table error. */
- PRINT_INSN_ARG_INVALID_OP_TABLE = -2,
- /* A memory error. */
- PRINT_INSN_ARG_MEMORY_ERROR = -3,
- };
- /* Get a 1 byte signed integer. */
- #define NEXTBYTE(p, val) \
- do \
- { \
- p += 2; \
- if (!FETCH_DATA (info, p)) \
- return PRINT_INSN_ARG_MEMORY_ERROR; \
- val = COERCE_SIGNED_CHAR (p[-1]); \
- } \
- while (0)
- /* Get a 2 byte signed integer. */
- #define COERCE16(x) ((int) (((x) ^ 0x8000) - 0x8000))
- #define NEXTWORD(p, val, ret_val) \
- do \
- { \
- p += 2; \
- if (!FETCH_DATA (info, p)) \
- return ret_val; \
- val = COERCE16 ((p[-2] << 8) + p[-1]); \
- } \
- while (0)
- /* Get a 4 byte signed integer. */
- #define COERCE32(x) (((bfd_vma) (x) ^ 0x80000000) - 0x80000000)
- #define NEXTLONG(p, val, ret_val) \
- do \
- { \
- p += 4; \
- if (!FETCH_DATA (info, p)) \
- return ret_val; \
- val = COERCE32 (((((((unsigned) p[-4] << 8) + p[-3]) << 8) \
- + p[-2]) << 8) + p[-1]); \
- } \
- while (0)
- /* Get a 4 byte unsigned integer. */
- #define NEXTULONG(p, val) \
- do \
- { \
- p += 4; \
- if (!FETCH_DATA (info, p)) \
- return PRINT_INSN_ARG_MEMORY_ERROR; \
- val = (((((((unsigned) p[-4] << 8) + p[-3]) << 8) \
- + p[-2]) << 8) + p[-1]); \
- } \
- while (0)
- /* Get a single precision float. */
- #define NEXTSINGLE(val, p) \
- do \
- { \
- p += 4; \
- if (!FETCH_DATA (info, p)) \
- return PRINT_INSN_ARG_MEMORY_ERROR; \
- floatformat_to_double (& floatformat_ieee_single_big, \
- (char *) p - 4, & val); \
- } \
- while (0)
- /* Get a double precision float. */
- #define NEXTDOUBLE(val, p) \
- do \
- { \
- p += 8; \
- if (!FETCH_DATA (info, p)) \
- return PRINT_INSN_ARG_MEMORY_ERROR; \
- floatformat_to_double (& floatformat_ieee_double_big, \
- (char *) p - 8, & val); \
- } \
- while (0)
- /* Get an extended precision float. */
- #define NEXTEXTEND(val, p) \
- do \
- { \
- p += 12; \
- if (!FETCH_DATA (info, p)) \
- return PRINT_INSN_ARG_MEMORY_ERROR; \
- floatformat_to_double (& floatformat_m68881_ext, \
- (char *) p - 12, & val); \
- } \
- while (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... */
- #define NEXTPACKED(p, val) \
- do \
- { \
- p += 12; \
- if (!FETCH_DATA (info, p)) \
- return PRINT_INSN_ARG_MEMORY_ERROR; \
- val = 0.0; \
- } \
- while (0)
- /* Maximum length of an instruction. */
- #define MAXLEN 22
- struct private
- {
- /* Points to first byte not fetched. */
- bfd_byte *max_fetched;
- bfd_byte the_buffer[MAXLEN];
- bfd_vma insn_start;
- };
- /* Make sure that bytes from INFO->PRIVATE_DATA->BUFFER (inclusive)
- to ADDR (exclusive) are valid. Returns 1 for success, 0 on memory
- error. */
- #define FETCH_DATA(info, addr) \
- ((addr) <= ((struct private *) (info->private_data))->max_fetched \
- ? 1 : fetch_data ((info), (addr)))
- static int
- fetch_data (struct disassemble_info *info, bfd_byte *addr)
- {
- int status;
- struct private *priv = (struct private *)info->private_data;
- bfd_vma start = priv->insn_start + (priv->max_fetched - priv->the_buffer);
- status = (*info->read_memory_func) (start,
- priv->max_fetched,
- addr - priv->max_fetched,
- info);
- if (status != 0)
- {
- (*info->memory_error_func) (status, start, info);
- return 0;
- }
- else
- priv->max_fetched = addr;
- return 1;
- }
- /* This function is used to print to the bit-bucket. */
- static int
- dummy_printer (FILE *file ATTRIBUTE_UNUSED,
- const char *format ATTRIBUTE_UNUSED,
- ...)
- {
- return 0;
- }
- static void
- dummy_print_address (bfd_vma vma ATTRIBUTE_UNUSED,
- struct disassemble_info *info ATTRIBUTE_UNUSED)
- {
- }
- /* 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.
- Returns -1 on failure. */
- static int
- fetch_arg (unsigned char *buffer,
- int code,
- int bits,
- disassemble_info *info)
- {
- int val = 0;
- switch (code)
- {
- case '/': /* MAC/EMAC mask bit. */
- val = buffer[3] >> 5;
- break;
- case 'G': /* EMAC ACC load. */
- val = ((buffer[3] >> 3) & 0x2) | ((~buffer[1] >> 7) & 0x1);
- break;
- case 'H': /* EMAC ACC !load. */
- val = ((buffer[3] >> 3) & 0x2) | ((buffer[1] >> 7) & 0x1);
- break;
- case ']': /* EMAC ACCEXT bit. */
- val = buffer[0] >> 2;
- break;
- 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':
- if (! FETCH_DATA (info, buffer + 3))
- return -1;
- val = (buffer[3] >> 4);
- break;
- case 'C':
- if (! FETCH_DATA (info, buffer + 3))
- return -1;
- val = buffer[3];
- break;
- case '1':
- if (! FETCH_DATA (info, buffer + 3))
- return -1;
- val = (buffer[2] << 8) + buffer[3];
- val >>= 12;
- break;
- case '2':
- if (! FETCH_DATA (info, buffer + 3))
- return -1;
- val = (buffer[2] << 8) + buffer[3];
- val >>= 6;
- break;
- case '3':
- case 'j':
- if (! FETCH_DATA (info, buffer + 3))
- return -1;
- val = (buffer[2] << 8) + buffer[3];
- break;
- case '4':
- if (! FETCH_DATA (info, buffer + 5))
- return -1;
- val = (buffer[4] << 8) + buffer[5];
- val >>= 12;
- break;
- case '5':
- if (! FETCH_DATA (info, buffer + 5))
- return -1;
- val = (buffer[4] << 8) + buffer[5];
- val >>= 6;
- break;
- case '6':
- if (! FETCH_DATA (info, buffer + 5))
- return -1;
- val = (buffer[4] << 8) + buffer[5];
- break;
- case '7':
- if (! FETCH_DATA (info, buffer + 3))
- return -1;
- val = (buffer[2] << 8) + buffer[3];
- val >>= 7;
- break;
- case '8':
- if (! FETCH_DATA (info, buffer + 3))
- return -1;
- val = (buffer[2] << 8) + buffer[3];
- val >>= 10;
- break;
- case '9':
- if (! FETCH_DATA (info, buffer + 3))
- return -1;
- val = (buffer[2] << 8) + buffer[3];
- val >>= 5;
- break;
- case 'e':
- val = (buffer[1] >> 6);
- break;
- case 'E':
- if (! FETCH_DATA (info, buffer + 3))
- return -1;
- val = (buffer[2] >> 1);
- break;
- case 'm':
- val = (buffer[1] & 0x40 ? 0x8 : 0)
- | ((buffer[0] >> 1) & 0x7)
- | (buffer[3] & 0x80 ? 0x10 : 0);
- break;
- case 'n':
- val = (buffer[1] & 0x40 ? 0x8 : 0) | ((buffer[0] >> 1) & 0x7);
- break;
- case 'o':
- val = (buffer[2] >> 4) | (buffer[3] & 0x80 ? 0x10 : 0);
- break;
- case 'M':
- val = (buffer[1] & 0xf) | (buffer[3] & 0x40 ? 0x10 : 0);
- break;
- case 'N':
- val = (buffer[3] & 0xf) | (buffer[3] & 0x40 ? 0x10 : 0);
- break;
- case 'h':
- val = buffer[2] >> 2;
- break;
- default:
- abort ();
- }
- /* bits is never too big. */
- return val & ((1 << bits) - 1);
- }
- /* 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 bool
- 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;
- }
- /* Print a base register REGNO and displacement DISP, on INFO->STREAM.
- REGNO = -1 for pc, -2 for none (suppressed). */
- 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];
- 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);
- }
- }
- /* 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.
- Returns NULL upon error. */
- static unsigned char *
- print_indexed (int basereg,
- unsigned char *p,
- bfd_vma addr,
- 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];
- NEXTWORD (p, word, NULL);
- /* 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:
- NEXTWORD (p, base_disp, NULL);
- break;
- case 3:
- NEXTLONG (p, base_disp, NULL);
- }
- 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:
- NEXTWORD (p, outer_disp, NULL);
- break;
- case 3:
- NEXTLONG (p, outer_disp, NULL);
- }
- 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;
- }
- #define FETCH_ARG(size, val) \
- do \
- { \
- val = fetch_arg (buffer, place, size, info); \
- if (val < 0) \
- return PRINT_INSN_ARG_MEMORY_ERROR; \
- } \
- while (0)
- /* Returns number of bytes "eaten" by the operand, or
- return enum print_insn_arg_error. 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;
- int flt_p;
- bfd_signed_vma disp;
- unsigned int uval;
- switch (*d)
- {
- case 'c': /* Cache identifier. */
- {
- static char *const cacheFieldName[] = { "nc", "dc", "ic", "bc" };
- FETCH_ARG (2, val);
- (*info->fprintf_func) (info->stream, "%s", cacheFieldName[val]);
- break;
- }
- case 'a': /* Address register indirect only. Cf. case '+'. */
- {
- FETCH_ARG (3, val);
- (*info->fprintf_func) (info->stream, "%s@", reg_names[val + 8]);
- break;
- }
- case '_': /* 32-bit absolute address for move16. */
- {
- NEXTULONG (p, uval);
- (*info->print_address_func) (uval, info);
- break;
- }
- case 'C':
- (*info->fprintf_func) (info->stream, "%%ccr");
- break;
- case 'S':
- (*info->fprintf_func) (info->stream, "%%sr");
- break;
- case 'U':
- (*info->fprintf_func) (info->stream, "%%usp");
- break;
- case 'E':
- (*info->fprintf_func) (info->stream, "%%acc");
- break;
- case 'G':
- (*info->fprintf_func) (info->stream, "%%macsr");
- break;
- case 'H':
- (*info->fprintf_func) (info->stream, "%%mask");
- break;
- case 'J':
- {
- /* FIXME: There's a problem here, different m68k processors call the
- same address different names. The tables below try to get it right
- using info->mach, but only for v4e. */
- struct regname { char * name; int value; };
- static const struct regname names[] =
- {
- {"%sfc", 0x000}, {"%dfc", 0x001}, {"%cacr", 0x002},
- {"%tc", 0x003}, {"%itt0",0x004}, {"%itt1", 0x005},
- {"%dtt0",0x006}, {"%dtt1",0x007}, {"%buscr",0x008},
- {"%rgpiobar", 0x009}, {"%acr4",0x00c},
- {"%acr5",0x00d}, {"%acr6",0x00e}, {"%acr7", 0x00f},
- {"%usp", 0x800}, {"%vbr", 0x801}, {"%caar", 0x802},
- {"%msp", 0x803}, {"%isp", 0x804},
- {"%pc", 0x80f},
- /* Reg c04 is sometimes called flashbar or rambar.
- Reg c05 is also sometimes called rambar. */
- {"%rambar0", 0xc04}, {"%rambar1", 0xc05},
- /* reg c0e is sometimes called mbar2 or secmbar.
- reg c0f is sometimes called mbar. */
- {"%mbar0", 0xc0e}, {"%mbar1", 0xc0f},
- /* Should we be calling this psr like we do in case 'Y'? */
- {"%mmusr",0x805},
- {"%urp", 0x806}, {"%srp", 0x807}, {"%pcr", 0x808},
- /* Fido added these. */
- {"%cac", 0xffe}, {"%mbo", 0xfff}
- };
- /* Alternate names for v4e (MCF5407/5445x/MCF547x/MCF548x), at least. */
- static const struct regname names_v4e[] =
- {
- {"%asid",0x003}, {"%acr0",0x004}, {"%acr1",0x005},
- {"%acr2",0x006}, {"%acr3",0x007}, {"%mmubar",0x008},
- };
- unsigned int arch_mask;
- arch_mask = bfd_m68k_mach_to_features (info->mach);
- FETCH_ARG (12, val);
- if (arch_mask & (mcfisa_b | mcfisa_c))
- {
- for (regno = ARRAY_SIZE (names_v4e); --regno >= 0;)
- if (names_v4e[regno].value == val)
- {
- (*info->fprintf_func) (info->stream, "%s", names_v4e[regno].name);
- break;
- }
- if (regno >= 0)
- break;
- }
- for (regno = ARRAY_SIZE (names) - 1; regno >= 0; regno--)
- if (names[regno].value == val)
- {
- (*info->fprintf_func) (info->stream, "%s", names[regno].name);
- break;
- }
- if (regno < 0)
- (*info->fprintf_func) (info->stream, "0x%x", val);
- }
- break;
- case 'Q':
- FETCH_ARG (3, val);
- /* 0 means 8, except for the bkpt instruction... */
- if (val == 0 && d[1] != 's')
- val = 8;
- (*info->fprintf_func) (info->stream, "#%d", val);
- break;
- case 'x':
- FETCH_ARG (3, val);
- /* 0 means -1. */
- if (val == 0)
- val = -1;
- (*info->fprintf_func) (info->stream, "#%d", val);
- break;
- case 'j':
- FETCH_ARG (3, val);
- (*info->fprintf_func) (info->stream, "#%d", val+1);
- break;
- case 'K':
- FETCH_ARG (9, val);
- (*info->fprintf_func) (info->stream, "#%d", val);
- break;
- case 'M':
- if (place == 'h')
- {
- static char *const scalefactor_name[] = { "<<", ">>" };
- FETCH_ARG (1, val);
- (*info->fprintf_func) (info->stream, "%s", scalefactor_name[val]);
- }
- else
- {
- FETCH_ARG (8, val);
- if (val & 0x80)
- val = val - 0x100;
- (*info->fprintf_func) (info->stream, "#%d", val);
- }
- break;
- case 'T':
- FETCH_ARG (4, val);
- (*info->fprintf_func) (info->stream, "#%d", val);
- break;
- case 'D':
- FETCH_ARG (3, val);
- (*info->fprintf_func) (info->stream, "%s", reg_names[val]);
- break;
- case 'A':
- FETCH_ARG (3, val);
- (*info->fprintf_func) (info->stream, "%s", reg_names[val + 010]);
- break;
- case 'R':
- FETCH_ARG (4, val);
- (*info->fprintf_func) (info->stream, "%s", reg_names[val]);
- break;
- case 'r':
- FETCH_ARG (4, regno);
- 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':
- FETCH_ARG (3, val);
- (*info->fprintf_func) (info->stream, "%%fp%d", val);
- break;
- case 'O':
- FETCH_ARG (6, val);
- if (val & 0x20)
- (*info->fprintf_func) (info->stream, "%s", reg_names[val & 7]);
- else
- (*info->fprintf_func) (info->stream, "%d", val);
- break;
- case '+':
- FETCH_ARG (3, val);
- (*info->fprintf_func) (info->stream, "%s@+", reg_names[val + 8]);
- break;
- case '-':
- FETCH_ARG (3, val);
- (*info->fprintf_func) (info->stream, "%s@-", reg_names[val + 8]);
- break;
- case 'k':
- if (place == 'k')
- {
- FETCH_ARG (3, val);
- (*info->fprintf_func) (info->stream, "{%s}", reg_names[val]);
- }
- else if (place == 'C')
- {
- FETCH_ARG (7, val);
- if (val > 63) /* This is a signed constant. */
- val -= 128;
- (*info->fprintf_func) (info->stream, "{#%d}", val);
- }
- else
- return PRINT_INSN_ARG_INVALID_OPERAND;
- break;
- case '#':
- case '^':
- p1 = buffer + (*d == '#' ? 2 : 4);
- if (place == 's')
- FETCH_ARG (4, val);
- else if (place == 'C')
- FETCH_ARG (7, val);
- else if (place == '8')
- FETCH_ARG (3, val);
- else if (place == '3')
- FETCH_ARG (8, val);
- else if (place == 'b')
- NEXTBYTE (p1, val);
- else if (place == 'w' || place == 'W')
- NEXTWORD (p1, val, PRINT_INSN_ARG_MEMORY_ERROR);
- else if (place == 'l')
- NEXTLONG (p1, val, PRINT_INSN_ARG_MEMORY_ERROR);
- else
- return PRINT_INSN_ARG_INVALID_OP_TABLE;
- (*info->fprintf_func) (info->stream, "#%d", val);
- break;
- case 'B':
- if (place == 'b')
- NEXTBYTE (p, disp);
- else if (place == 'B')
- disp = COERCE_SIGNED_CHAR (buffer[1]);
- else if (place == 'w' || place == 'W')
- NEXTWORD (p, disp, PRINT_INSN_ARG_MEMORY_ERROR);
- else if (place == 'l' || place == 'L' || place == 'C')
- NEXTLONG (p, disp, PRINT_INSN_ARG_MEMORY_ERROR);
- else if (place == 'g')
- {
- NEXTBYTE (buffer, disp);
- if (disp == 0)
- NEXTWORD (p, disp, PRINT_INSN_ARG_MEMORY_ERROR);
- else if (disp == -1)
- NEXTLONG (p, disp, PRINT_INSN_ARG_MEMORY_ERROR);
- }
- else if (place == 'c')
- {
- if (buffer[1] & 0x40) /* If bit six is one, long offset. */
- NEXTLONG (p, disp, PRINT_INSN_ARG_MEMORY_ERROR);
- else
- NEXTWORD (p, disp, PRINT_INSN_ARG_MEMORY_ERROR);
- }
- else
- return PRINT_INSN_ARG_INVALID_OP_TABLE;
- (*info->print_address_func) (addr + disp, info);
- break;
- case 'd':
- {
- int val1;
- NEXTWORD (p, val, PRINT_INSN_ARG_MEMORY_ERROR);
- FETCH_ARG (3, val1);
- (*info->fprintf_func) (info->stream, "%s@(%d)", reg_names[val1 + 8], val);
- break;
- }
- case 's':
- FETCH_ARG (3, val);
- (*info->fprintf_func) (info->stream, "%s", fpcr_names[val]);
- break;
- case 'e':
- FETCH_ARG (2, val);
- (*info->fprintf_func) (info->stream, "%%acc%d", val);
- break;
- case 'g':
- FETCH_ARG (1, val);
- (*info->fprintf_func) (info->stream, "%%accext%s", val == 0 ? "01" : "23");
- break;
- case 'i':
- FETCH_ARG (2, val);
- if (val == 1)
- (*info->fprintf_func) (info->stream, "<<");
- else if (val == 3)
- (*info->fprintf_func) (info->stream, ">>");
- else
- return PRINT_INSN_ARG_INVALID_OPERAND;
- break;
- case 'I':
- /* Get coprocessor ID... */
- val = fetch_arg (buffer, 'd', 3, info);
- if (val < 0)
- return PRINT_INSN_ARG_MEMORY_ERROR;
- if (val != 1) /* Unusual coprocessor ID? */
- (*info->fprintf_func) (info->stream, "(cpid=%d) ", val);
- break;
- case '4':
- case '*':
- case '~':
- case '%':
- case ';':
- case '@':
- case '!':
- case '$':
- case '?':
- case '/':
- case '&':
- case '|':
- case '<':
- case '>':
- case 'm':
- case 'n':
- case 'o':
- case 'p':
- case 'q':
- case 'v':
- case 'b':
- case 'w':
- case 'y':
- case 'z':
- if (place == 'd')
- {
- val = fetch_arg (buffer, 'x', 6, info);
- if (val < 0)
- return PRINT_INSN_ARG_MEMORY_ERROR;
- val = ((val & 7) << 3) + ((val >> 3) & 7);
- }
- else
- {
- val = fetch_arg (buffer, 's', 6, info);
- if (val < 0)
- return PRINT_INSN_ARG_MEMORY_ERROR;
- }
- /* If the <ea> is invalid for *d, then reject this match. */
- if (!m68k_valid_ea (*d, val))
- return PRINT_INSN_ARG_INVALID_OPERAND;
- /* Get register number assuming address register. */
- regno = (val & 7) + 8;
- regname = reg_names[regno];
- switch (val >> 3)
- {
- case 0:
- (*info->fprintf_func) (info->stream, "%s", reg_names[val]);
- break;
- case 1:
- (*info->fprintf_func) (info->stream, "%s", regname);
- break;
- case 2:
- (*info->fprintf_func) (info->stream, "%s@", regname);
- break;
- case 3:
- (*info->fprintf_func) (info->stream, "%s@+", regname);
- break;
- case 4:
- (*info->fprintf_func) (info->stream, "%s@-", regname);
- break;
- case 5:
- NEXTWORD (p, val, PRINT_INSN_ARG_MEMORY_ERROR);
- (*info->fprintf_func) (info->stream, "%s@(%d)", regname, val);
- break;
- case 6:
- p = print_indexed (regno, p, addr, info);
- if (p == NULL)
- return PRINT_INSN_ARG_MEMORY_ERROR;
- break;
- case 7:
- switch (val & 7)
- {
- case 0:
- NEXTWORD (p, val, PRINT_INSN_ARG_MEMORY_ERROR);
- (*info->print_address_func) (val, info);
- break;
- case 1:
- NEXTULONG (p, uval);
- (*info->print_address_func) (uval, info);
- break;
- case 2:
- NEXTWORD (p, val, PRINT_INSN_ARG_MEMORY_ERROR);
- (*info->fprintf_func) (info->stream, "%%pc@(");
- (*info->print_address_func) (addr + val, info);
- (*info->fprintf_func) (info->stream, ")");
- break;
- case 3:
- p = print_indexed (-1, p, addr, info);
- if (p == NULL)
- return PRINT_INSN_ARG_MEMORY_ERROR;
- break;
- case 4:
- flt_p = 1; /* Assume it's a float... */
- switch (place)
- {
- case 'b':
- NEXTBYTE (p, val);
- flt_p = 0;
- break;
- case 'w':
- NEXTWORD (p, val, PRINT_INSN_ARG_MEMORY_ERROR);
- flt_p = 0;
- break;
- case 'l':
- NEXTLONG (p, val, PRINT_INSN_ARG_MEMORY_ERROR);
- flt_p = 0;
- break;
- case 'f':
- NEXTSINGLE (flval, p);
- break;
- case 'F':
- NEXTDOUBLE (flval, p);
- break;
- case 'x':
- NEXTEXTEND (flval, p);
- break;
- case 'p':
- NEXTPACKED (p, flval);
- break;
- default:
- return PRINT_INSN_ARG_INVALID_OPERAND;
- }
- if (flt_p) /* Print a float? */
- (*info->fprintf_func) (info->stream, "#0e%g", flval);
- else
- (*info->fprintf_func) (info->stream, "#%d", val);
- break;
- default:
- return PRINT_INSN_ARG_INVALID_OPERAND;
- }
- }
- /* If place is '/', then this is the case of the mask bit for
- mac/emac loads. Now that the arg has been printed, grab the
- mask bit and if set, add a '&' to the arg. */
- if (place == '/')
- {
- FETCH_ARG (1, val);
- if (val)
- info->fprintf_func (info->stream, "&");
- }
- break;
- case 'L':
- case 'l':
- if (place == 'w')
- {
- char doneany;
- p1 = buffer + 2;
- NEXTWORD (p1, val, PRINT_INSN_ARG_MEMORY_ERROR);
- /* Move the pointer ahead if this point is farther ahead
- than the last. */
- p = p1 > p ? p1 : p;
- if (val == 0)
- {
- (*info->fprintf_func) (info->stream, "#0");
- break;
- }
- if (*d == 'l')
- {
- 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)
- (*info->fprintf_func) (info->stream, "/");
- doneany = 1;
- (*info->fprintf_func) (info->stream, "%s", reg_names[regno]);
- first_regno = regno;
- while (val & (1 << (regno + 1)))
- ++regno;
- if (regno > first_regno)
- (*info->fprintf_func) (info->stream, "-%s",
- reg_names[regno]);
- }
- }
- else if (place == '3')
- {
- /* `fmovem' insn. */
- char doneany;
- FETCH_ARG (8, val);
- if (val == 0)
- {
- (*info->fprintf_func) (info->stream, "#0");
- break;
- }
- if (*d == 'l')
- {
- 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)
- (*info->fprintf_func) (info->stream, "/");
- doneany = 1;
- (*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);
- }
- }
- else if (place == '8')
- {
- FETCH_ARG (3, val);
- /* fmoveml for FP status registers. */
- (*info->fprintf_func) (info->stream, "%s", fpcr_names[val]);
- }
- else
- return PRINT_INSN_ARG_INVALID_OP_TABLE;
- break;
- case 'X':
- place = '8';
- /* Fall through. */
- case 'Y':
- case 'Z':
- case 'W':
- case '0':
- case '1':
- case '2':
- case '3':
- {
- char *name = 0;
- FETCH_ARG (5, val);
- 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 (5, fc);
- if (fc == 1)
- (*info->fprintf_func) (info->stream, "%%dfc");
- else if (fc == 0)
- (*info->fprintf_func) (info->stream, "%%sfc");
- else
- /* xgettext:c-format */
- (*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 (3, level);
- (*info->fprintf_func) (info->stream, "%d", level);
- }
- break;
- case 'u':
- {
- short is_upper = 0;
- int reg;
- FETCH_ARG (5, reg);
- if (reg & 0x10)
- {
- is_upper = 1;
- reg &= 0xf;
- }
- (*info->fprintf_func) (info->stream, "%s%s",
- reg_half_names[reg],
- is_upper ? "u" : "l");
- }
- break;
- default:
- return PRINT_INSN_ARG_INVALID_OP_TABLE;
- }
- return p - p0;
- }
- /* Try to match the current instruction to best and if so, return the
- number of bytes consumed from the instruction stream, else zero.
- Return -1 on memory error. */
- static int
- match_insn_m68k (bfd_vma memaddr,
- disassemble_info * info,
- const struct m68k_opcode * best)
- {
- unsigned char *save_p;
- unsigned char *p;
- const char *d;
- const char *args = best->args;
- struct private *priv = (struct private *) info->private_data;
- 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;
- if (*args == '.')
- args++;
- /* Point at first word of argument data,
- and at descriptor for first argument. */
- p = buffer + 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 = 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;
- }
- 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;
- }
- }
- /* 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;
- /* lpstop is another exception. It takes a one word argument but is
- three words long. */
- if (p - buffer < 6
- && (best->match & 0xffff) == 0xffff
- && args[0] == '#'
- && 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;
- if (!FETCH_DATA (info, p))
- return -1;
- buffer[2] = buffer[4];
- buffer[3] = buffer[5];
- }
- if (!FETCH_DATA (info, p))
- return -1;
- save_p = p;
- info->print_address_func = dummy_print_address;
- info->fprintf_func = (fprintf_ftype) dummy_printer;
- /* We scan the operands twice. The first time we don't print anything,
- but look for errors. */
- for (d = args; *d; d += 2)
- {
- int eaten = print_insn_arg (d, buffer, p, memaddr + (p - buffer), info);
- if (eaten >= 0)
- p += eaten;
- else if (eaten == PRINT_INSN_ARG_INVALID_OPERAND
- || eaten == PRINT_INSN_ARG_MEMORY_ERROR)
- {
- info->fprintf_func = save_printer;
- info->print_address_func = save_print_address;
- return eaten == PRINT_INSN_ARG_MEMORY_ERROR ? -1 : 0;
- }
- else
- {
- /* We must restore the print functions before trying to print the
- error message. */
- info->fprintf_func = save_printer;
- info->print_address_func = save_print_address;
- info->fprintf_func (info->stream,
- /* xgettext:c-format */
- _("<internal error in opcode table: %s %s>\n"),
- best->name, best->args);
- return 2;
- }
- }
- p = save_p;
- info->fprintf_func = save_printer;
- info->print_address_func = save_print_address;
- d = 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);
- d += 2;
- if (*d && *(d - 2) != 'I' && *d != 'k')
- info->fprintf_func (info->stream, ",");
- }
- return p - buffer;
- }
- /* Try to interpret the instruction at address MEMADDR as one that
- can execute on a processor with the features given by ARCH_MASK.
- If successful, print the instruction to INFO->STREAM and return
- its length in bytes. Return 0 otherwise. Return -1 on memory
- error. */
- static int
- m68k_scan_mask (bfd_vma memaddr, disassemble_info *info,
- unsigned int arch_mask)
- {
- int i;
- const char *d;
- static const struct m68k_opcode **opcodes[16];
- static int numopcodes[16];
- int val;
- int major_opcode;
- struct private *priv = (struct private *) info->private_data;
- bfd_byte *buffer = priv->the_buffer;
- 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];
- /* 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]++;
- /* 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];
- for (i = 1; i < 16; i++)
- {
- opc_pointer[i] = opc_pointer[i - 1] + numopcodes[i - 1];
- opcodes[i] = opc_pointer[i];
- }
- for (i = 0; i < m68k_numopcodes; i++)
- *opc_pointer[(m68k_opcodes[i].opcode >> 28) & 15]++ = &m68k_opcodes[i];
- }
- if (!FETCH_DATA (info, buffer + 2))
- return -1;
- 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;
- const char *args = opc->args;
- if (*args == '.')
- args++;
- 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 = 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 = args; *d; d += 2)
- if (d[1] == 't')
- break;
- /* Don't match fmovel with more than one register;
- wait for fmoveml. */
- if (*d == '\0')
- {
- for (d = args; *d; d += 2)
- {
- if (d[0] == 's' && d[1] == '8')
- {
- val = fetch_arg (buffer, d[1], 3, info);
- if (val < 0)
- return 0;
- if ((val & (val - 1)) != 0)
- break;
- }
- }
- }
- /* Don't match FPU insns with non-default coprocessor ID. */
- if (*d == '\0')
- {
- for (d = args; *d; d += 2)
- {
- if (d[0] == 'I')
- {
- val = fetch_arg (buffer, 'd', 3, info);
- if (val != 1)
- break;
- }
- }
- }
- if (*d == '\0')
- if ((val = match_insn_m68k (memaddr, info, opc)))
- return val;
- }
- }
- return 0;
- }
- /* Print the m68k instruction at address MEMADDR in debugged memory,
- on INFO->STREAM. Returns length of the instruction, in bytes. */
- int
- print_insn_m68k (bfd_vma memaddr, disassemble_info *info)
- {
- unsigned int arch_mask;
- struct private priv;
- int val;
- bfd_byte *buffer = priv.the_buffer;
- info->private_data = & 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;
- arch_mask = bfd_m68k_mach_to_features (info->mach);
- if (!arch_mask)
- {
- /* First try printing an m680x0 instruction. Try printing a Coldfire
- one if that fails. */
- val = m68k_scan_mask (memaddr, info, m68k_mask);
- if (val <= 0)
- val = m68k_scan_mask (memaddr, info, mcf_mask);
- }
- else
- {
- val = m68k_scan_mask (memaddr, info, arch_mask);
- }
- if (val == 0)
- /* Handle undefined instructions. */
- info->fprintf_func (info->stream, ".short 0x%04x", (buffer[0] << 8) + buffer[1]);
- return val ? val : 2;
- }
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