diff options
Diffstat (limited to 'opcodes/m68k-dis.c')
| -rw-r--r-- | opcodes/m68k-dis.c | 1632 |
1 files changed, 0 insertions, 1632 deletions
diff --git a/opcodes/m68k-dis.c b/opcodes/m68k-dis.c deleted file mode 100644 index bc2dd49..0000000 --- a/opcodes/m68k-dis.c +++ /dev/null @@ -1,1632 +0,0 @@ -/* Print Motorola 68k instructions. - Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997, - 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, - 2012 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 "dis-asm.h" -#include "floatformat.h" -#include "libiberty.h" -#include "opintl.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 - -/* Get a 1 byte signed integer. */ -#define NEXTBYTE(p, val) \ - do \ - { \ - p += 2; \ - if (!FETCH_DATA (info, p)) \ - return -3; \ - 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_signed_vma) ((x) ^ 0x80000000) - 0x80000000) - -#define NEXTLONG(p, val, ret_val) \ - do \ - { \ - p += 4; \ - if (!FETCH_DATA (info, p)) \ - return ret_val; \ - val = COERCE32 ((((((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 -3; \ - val = (unsigned int) ((((((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 -3; \ - 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 -3; \ - 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 -3; \ - 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 -3; \ - val = 0.0; \ - } \ - while (0) - - -/* Maximum length of an instruction. */ -#define MAXLEN 22 - -#include <setjmp.h> - -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 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 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; -} - -/* 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 -3; \ - } \ - while (0) - -/* 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 or -3 to simply abort. - 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 -1; - 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, -3); - else if (place == 'l') - NEXTLONG (p1, val, -3); - else - return -2; - - (*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, -3); - else if (place == 'l' || place == 'L' || place == 'C') - NEXTLONG (p, disp, -3); - else if (place == 'g') - { - NEXTBYTE (buffer, disp); - if (disp == 0) - NEXTWORD (p, disp, -3); - else if (disp == -1) - NEXTLONG (p, disp, -3); - } - else if (place == 'c') - { - if (buffer[1] & 0x40) /* If bit six is one, long offset. */ - NEXTLONG (p, disp, -3); - else - NEXTWORD (p, disp, -3); - } - else - return -2; - - (*info->print_address_func) (addr + disp, info); - break; - - case 'd': - { - int val1; - - NEXTWORD (p, val, -3); - 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 -1; - break; - - case 'I': - /* Get coprocessor ID... */ - val = fetch_arg (buffer, 'd', 3, info); - if (val < 0) - return -3; - 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 -3; - val = ((val & 7) << 3) + ((val >> 3) & 7); - } - else - { - val = fetch_arg (buffer, 's', 6, info); - if (val < 0) - return -3; - } - - /* If the <ea> is invalid for *d, then reject this match. */ - if (!m68k_valid_ea (*d, val)) - return -1; - - /* 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, -3); - (*info->fprintf_func) (info->stream, "%s@(%d)", regname, val); - break; - - case 6: - p = print_indexed (regno, p, addr, info); - if (p == NULL) - return -3; - break; - - case 7: - switch (val & 7) - { - case 0: - NEXTWORD (p, val, -3); - (*info->print_address_func) (val, info); - break; - - case 1: - NEXTULONG (p, uval); - (*info->print_address_func) (uval, info); - break; - - case 2: - NEXTWORD (p, val, -3); - (*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 -3; - 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, -3); - flt_p = 0; - break; - - case 'l': - NEXTLONG (p, val, -3); - 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 -1; - } - 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 -1; - } - } - - /* 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, -3); - /* 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 -2; - break; - - case 'X': - place = '8'; - 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 -2; - } - - 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. */ - -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; - FETCH_DATA (info, p); - buffer[2] = buffer[4]; - buffer[3] = buffer[5]; - } - - FETCH_DATA (info, p); - - 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 == -1 || eaten == -3) - { - info->fprintf_func = save_printer; - info->print_address_func = save_print_address; - return 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. */ - -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]; - } - - 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; - 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; -} |