sys/powerpc/powerpc/db_disasm.c

   1 /*      $NetBSD: db_disasm.c,v 1.28 2013/07/04 23:00:23 joerg Exp $     */
   2 /*      $OpenBSD: db_disasm.c,v 1.2 1996/12/28 06:21:48 rahnds Exp $    */
   3
   4 #include <sys/cdefs.h>
   5 __FBSDID("$FreeBSD$");
   6
   7 #include <sys/param.h>
   8 #include <sys/proc.h>
   9 #include <sys/systm.h>
  10
  11 #include <machine/db_machdep.h>
  12
  13 #include <ddb/ddb.h>
  14 #include <ddb/db_access.h>
  15 #include <ddb/db_sym.h>
  16 #include <ddb/db_variables.h>
  17 #include <ddb/db_output.h>
  18
  19 enum function_mask {
  20         Op_A    =       0x00000001,
  21         Op_B    =       0x00000002,
  22         Op_BI   =       0x00000004,
  23         Op_BO   =       0x00000008,
  24         Op_BC   =       Op_BI | Op_BO,
  25         Op_CRM  =       0x00000010,
  26         Op_D    =       0x00000020,
  27         Op_ST   =       0x00000020,  /* Op_S for store-operations, same as D */
  28         Op_S    =       0x00000040,  /* S-field is swapped with A-field */
  29         Op_FM   =       Op_D | Op_S, /* kludge (reduce Op_s) */
  30         Op_dA  =        0x00000080,
  31         Op_LK   =       0x00000100,
  32         Op_Rc   =       0x00000200,
  33         Op_AA   =       Op_LK | Op_Rc, /* kludge (reduce Op_s) */
  34         Op_LKM  =       Op_AA,
  35         Op_RcM  =       Op_AA,
  36         Op_OE   =       0x00000400,
  37         Op_SR   =       0x00000800,
  38         Op_TO   =       0x00001000,
  39         Op_sign =       0x00002000,
  40         Op_const =      0x00004000,
  41         Op_SIMM =       Op_const | Op_sign,
  42         Op_UIMM =       Op_const,
  43         Op_crbA =       0x00008000,
  44         Op_crbB =       0x00010000,
  45         Op_WS   =       Op_crbB,        /* kludge, same field as crbB */
  46         Op_rSH  =       Op_crbB,        /* kludge, same field as crbB */
  47         Op_crbD =       0x00020000,
  48         Op_crfD =       0x00040000,
  49         Op_crfS =       0x00080000,
  50         Op_ds   =       0x00100000,
  51         Op_me   =       0x00200000,
  52         Op_spr  =       0x00400000,
  53         Op_dcr  =       Op_spr,         /* out of bits - cheat with Op_spr */
  54         Op_tbr  =       0x00800000,
  55
  56         Op_BP   =       0x01000000,
  57         Op_BD   =       0x02000000,
  58         Op_LI   =       0x04000000,
  59         Op_C    =       0x08000000,
  60
  61         Op_NB   =       0x10000000,
  62
  63         Op_sh_mb_sh =   0x20000000,
  64         Op_sh   =       0x40000000,
  65         Op_SH   =       Op_sh | Op_sh_mb_sh,
  66         Op_mb   =       0x80000000,
  67         Op_MB   =       Op_mb | Op_sh_mb_sh,
  68         Op_ME   =       Op_MB,
  69
  70 };
  71
  72 struct opcode {
  73         const char *name;
  74         u_int32_t mask;
  75         u_int32_t code;
  76         enum function_mask func;
  77 };
  78
  79 typedef u_int32_t instr_t;
  80 typedef void (op_class_func) (instr_t, vm_offset_t);
  81
  82 u_int32_t extract_field(u_int32_t value, u_int32_t base, u_int32_t width);
  83 void disasm_fields(const struct opcode *popcode, instr_t instr, vm_offset_t loc,
  84     char *disasm_str, size_t slen);
  85 void dis_ppc(const struct opcode *opcodeset, instr_t instr, vm_offset_t loc);
  86
  87 op_class_func op_ill, op_base;
  88 op_class_func op_cl_x13, op_cl_x1e, op_cl_x1f;
  89 op_class_func op_cl_x3a, op_cl_x3b;
  90 op_class_func op_cl_x3e, op_cl_x3f;
  91
  92 op_class_func *opcodes_base[] = {
  93 /*x00*/ op_ill,         op_ill,         op_base,        op_ill,
  94 /*x04*/ op_ill,         op_ill,         op_ill,         op_base,
  95 /*x08*/ op_base,        op_base,        op_base,        op_base,
  96 /*x0C*/ op_base,        op_base,        op_base/*XXX*/, op_base/*XXX*/,
  97 /*x10*/ op_base,        op_base,        op_base,        op_cl_x13,
  98 /*x14*/ op_base,        op_base,        op_ill,         op_base,
  99 /*x18*/ op_base,        op_base,        op_base,        op_base,
 100 /*x1C*/ op_base,        op_base,        op_cl_x1e,      op_cl_x1f,
 101 /*x20*/ op_base,        op_base,        op_base,        op_base,
 102 /*x24*/ op_base,        op_base,        op_base,        op_base,
 103 /*x28*/ op_base,        op_base,        op_base,        op_base,
 104 /*x2C*/ op_base,        op_base,        op_base,        op_base,
 105 /*x30*/ op_base,        op_base,        op_base,        op_base,
 106 /*x34*/ op_base,        op_base,        op_base,        op_base,
 107 /*x38*/ op_ill,         op_ill,         op_cl_x3a,      op_cl_x3b,
 108 /*x3C*/ op_ill,         op_ill,         op_cl_x3e,      op_cl_x3f
 109 };
 110
 111 /* This table could be modified to make significant the "reserved" fields
 112  * of the opcodes, But I didn't feel like it when typing in the table,
 113  * I would recommend that this table be looked over for errors,
 114  * This was derived from the table in Appendix A.2 of (Mot part # MPCFPE/AD)
 115  * PowerPC Microprocessor Family: The Programming Environments
 116  */
 117
 118 const struct opcode opcodes[] = {
 119         { "tdi",        0xfc000000, 0x08000000, Op_TO | Op_A | Op_SIMM },
 120         { "twi",        0xfc000000, 0x0c000000, Op_TO | Op_A | Op_SIMM },
 121         { "mulli",      0xfc000000, 0x1c000000, Op_D | Op_A | Op_SIMM },
 122         { "subfic",     0xfc000000, 0x20000000, Op_D | Op_A | Op_SIMM },
 123         { "cmplwi",     0xfc200000, 0x28000000, Op_crfD | Op_A | Op_SIMM },
 124         { "cmpldi",     0xfc200000, 0x28200000, Op_crfD | Op_A | Op_SIMM },
 125         { "cmpwi",      0xfc200000, 0x2c000000, Op_crfD | Op_A | Op_SIMM },
 126         { "cmpdi",      0xfc200000, 0x2c200000, Op_crfD | Op_A | Op_SIMM },
 127         { "addic",      0xfc000000, 0x30000000, Op_D | Op_A | Op_SIMM },
 128         { "addic.",     0xfc000000, 0x34000000, Op_D | Op_A | Op_SIMM },
 129         { "addi",       0xfc000000, 0x38000000, Op_D | Op_A | Op_SIMM },
 130         { "addis",      0xfc000000, 0x3c000000, Op_D | Op_A | Op_SIMM },
 131         { "b",          0xfc000000, 0x40000000, Op_BC | Op_BD | Op_AA | Op_LK }, /* bc */
 132         { "sc",         0xffffffff, 0x44000002, 0 },
 133         { "b",          0xfc000000, 0x48000000, Op_LI | Op_AA | Op_LK },
 134
 135         { "rlwimi",     0xfc000000, 0x50000000, Op_S | Op_A | Op_SH | Op_MB | Op_ME | Op_Rc },
 136         { "rlwinm",     0xfc000000, 0x54000000, Op_S | Op_A | Op_SH | Op_MB | Op_ME | Op_Rc },
 137         { "rlwnm",      0xfc000000, 0x5c000000, Op_S | Op_A | Op_SH | Op_MB | Op_ME | Op_Rc },
 138
 139         { "ori",        0xfc000000, 0x60000000, Op_S | Op_A | Op_UIMM },
 140         { "oris",       0xfc000000, 0x64000000, Op_S | Op_A | Op_UIMM },
 141         { "xori",       0xfc000000, 0x68000000, Op_S | Op_A | Op_UIMM },
 142         { "xoris",      0xfc000000, 0x6c000000, Op_S | Op_A | Op_UIMM },
 143
 144         { "andi.",      0xfc000000, 0x70000000, Op_S | Op_A | Op_UIMM },
 145         { "andis.",     0xfc000000, 0x74000000, Op_S | Op_A | Op_UIMM },
 146
 147         { "lwz",        0xfc000000, 0x80000000, Op_D | Op_dA },
 148         { "lwzu",       0xfc000000, 0x84000000, Op_D | Op_dA },
 149         { "lbz",        0xfc000000, 0x88000000, Op_D | Op_dA },
 150         { "lbzu",       0xfc000000, 0x8c000000, Op_D | Op_dA },
 151         { "stw",        0xfc000000, 0x90000000, Op_ST | Op_dA },
 152         { "stwu",       0xfc000000, 0x94000000, Op_ST | Op_dA },
 153         { "stb",        0xfc000000, 0x98000000, Op_ST | Op_dA },
 154         { "stbu",       0xfc000000, 0x9c000000, Op_ST | Op_dA },
 155
 156         { "lhz",        0xfc000000, 0xa0000000, Op_D | Op_dA },
 157         { "lhzu",       0xfc000000, 0xa4000000, Op_D | Op_dA },
 158         { "lha",        0xfc000000, 0xa8000000, Op_D | Op_dA },
 159         { "lhau",       0xfc000000, 0xac000000, Op_D | Op_dA },
 160         { "sth",        0xfc000000, 0xb0000000, Op_ST | Op_dA },
 161         { "sthu",       0xfc000000, 0xb4000000, Op_ST | Op_dA },
 162         { "lmw",        0xfc000000, 0xb8000000, Op_D | Op_dA },
 163         { "stmw",       0xfc000000, 0xbc000000, Op_ST | Op_dA },
 164
 165         { "lfs",        0xfc000000, 0xc0000000, Op_D | Op_dA },
 166         { "lfsu",       0xfc000000, 0xc4000000, Op_D | Op_dA },
 167         { "lfd",        0xfc000000, 0xc8000000, Op_D | Op_dA },
 168         { "lfdu",       0xfc000000, 0xcc000000, Op_D | Op_dA },
 169
 170         { "stfs",       0xfc000000, 0xd0000000, Op_ST | Op_dA },
 171         { "stfsu",      0xfc000000, 0xd4000000, Op_ST | Op_dA },
 172         { "stfd",       0xfc000000, 0xd8000000, Op_ST | Op_dA },
 173         { "stfdu",      0xfc000000, 0xdc000000, Op_ST | Op_dA },
 174         { "",           0x0,            0x0, 0 }
 175
 176 };
 177 /* 13 * 4 = 4c */
 178 const struct opcode opcodes_13[] = {
 179 /* 0x13 << 2 */
 180         { "mcrf",       0xfc0007fe, 0x4c000000, Op_crfD | Op_crfS },
 181         { "b",          0xfc0007fe, 0x4c000020, Op_BC | Op_LK }, /* bclr */
 182         { "crnor",      0xfc0007fe, 0x4c000042, Op_crbD | Op_crbA | Op_crbB },
 183         { "rfi",        0xfc0007fe, 0x4c000064, 0 },
 184         { "crandc",     0xfc0007fe, 0x4c000102, Op_crbD | Op_crbA | Op_crbB },
 185         { "isync",      0xfc0007fe, 0x4c00012c, 0 },
 186         { "crxor",      0xfc0007fe, 0x4c000182, Op_crbD | Op_crbA | Op_crbB },
 187         { "crnand",     0xfc0007fe, 0x4c0001c2, Op_crbD | Op_crbA | Op_crbB },
 188         { "crand",      0xfc0007fe, 0x4c000202, Op_crbD | Op_crbA | Op_crbB },
 189         { "creqv",      0xfc0007fe, 0x4c000242, Op_crbD | Op_crbA | Op_crbB },
 190         { "crorc",      0xfc0007fe, 0x4c000342, Op_crbD | Op_crbA | Op_crbB },
 191         { "cror",       0xfc0007fe, 0x4c000382, Op_crbD | Op_crbA | Op_crbB },
 192         { "b",          0xfc0007fe, 0x4c000420, Op_BC | Op_LK }, /* bcctr */
 193         { "",           0x0,            0x0, 0 }
 194 };
 195
 196 /* 1e * 4 = 78 */
 197 const struct opcode opcodes_1e[] = {
 198         { "rldicl",     0xfc00001c, 0x78000000, Op_S | Op_A | Op_sh | Op_mb | Op_Rc },
 199         { "rldicr",     0xfc00001c, 0x78000004, Op_S | Op_A | Op_sh | Op_me | Op_Rc },
 200         { "rldic",      0xfc00001c, 0x78000008, Op_S | Op_A | Op_sh | Op_mb | Op_Rc },
 201         { "rldimi",     0xfc00001c, 0x7800000c, Op_S | Op_A | Op_sh | Op_mb | Op_Rc },
 202         { "rldcl",      0xfc00003e, 0x78000010, Op_S | Op_A | Op_B | Op_mb | Op_Rc },
 203         { "rldcr",      0xfc00003e, 0x78000012, Op_S | Op_A | Op_B | Op_me | Op_Rc },
 204         { "",           0x0,            0x0, 0 }
 205 };
 206
 207 /* 1f * 4 = 7c */
 208 const struct opcode opcodes_1f[] = {
 209 /* 1f << 2 */
 210         { "cmpw",       0xfc2007fe, 0x7c000000, Op_crfD | Op_A | Op_B },
 211         { "cmpd",       0xfc2007fe, 0x7c200000, Op_crfD | Op_A | Op_B },
 212         { "tw",         0xfc0007fe, 0x7c000008, Op_TO | Op_A | Op_B },
 213         { "subfc",      0xfc0003fe, 0x7c000010, Op_D | Op_A | Op_B | Op_OE | Op_Rc },
 214         { "mulhdu",     0xfc0007fe, 0x7c000012, Op_D | Op_A | Op_B | Op_Rc },
 215         { "addc",       0xfc0003fe, 0x7c000014, Op_D | Op_A | Op_B | Op_OE | Op_Rc },
 216         { "mulhwu",     0xfc0007fe, 0x7c000016, Op_D | Op_A | Op_B | Op_Rc },
 217         { "isellt",     0xfc0007ff, 0x7c00001e, Op_D | Op_A | Op_B },
 218         { "iselgt",     0xfc0007ff, 0x7c00005e, Op_D | Op_A | Op_B },
 219         { "iseleq",     0xfc0007ff, 0x7c00009e, Op_D | Op_A | Op_B },
 220
 221         { "mfcr",       0xfc0007fe, 0x7c000026, Op_D },
 222         { "lwarx",      0xfc0007fe, 0x7c000028, Op_D | Op_A | Op_B },
 223         { "ldx",        0xfc0007fe, 0x7c00002a, Op_D | Op_A | Op_B },
 224         { "lwzx",       0xfc0007fe, 0x7c00002e, Op_D | Op_A | Op_B },
 225         { "slw",        0xfc0007fe, 0x7c000030, Op_D | Op_A | Op_B | Op_Rc },
 226         { "cntlzw",     0xfc0007fe, 0x7c000034, Op_S | Op_A | Op_Rc },
 227         { "sld",        0xfc0007fe, 0x7c000036, Op_D | Op_A | Op_B | Op_Rc },
 228         { "and",        0xfc0007fe, 0x7c000038, Op_D | Op_A | Op_B | Op_Rc },
 229         { "cmplw",      0xfc2007fe, 0x7c000040, Op_crfD | Op_A | Op_B },
 230         { "cmpld",      0xfc2007fe, 0x7c200040, Op_crfD | Op_A | Op_B },
 231         { "subf",       0xfc0003fe, 0x7c000050, Op_D | Op_A | Op_B | Op_OE | Op_Rc },
 232         { "ldux",       0xfc0007fe, 0x7c00006a, Op_D | Op_A | Op_B },
 233         { "dcbst",      0xfc0007fe, 0x7c00006c, Op_A | Op_B },
 234         { "lwzux",      0xfc0007fe, 0x7c00006e, Op_D | Op_A | Op_B },
 235         { "cntlzd",     0xfc0007fe, 0x7c000074, Op_S | Op_A | Op_Rc },
 236         { "andc",       0xfc0007fe, 0x7c000078, Op_S | Op_A | Op_B | Op_Rc },
 237         { "td",         0xfc0007fe, 0x7c000088, Op_TO | Op_A | Op_B },
 238         { "mulhd",      0xfc0007fe, 0x7c000092, Op_D | Op_A | Op_B | Op_Rc },
 239         { "mulhw",      0xfc0007fe, 0x7c000096, Op_D | Op_A | Op_B | Op_Rc },
 240         { "mfmsr",      0xfc0007fe, 0x7c0000a6, Op_D },
 241         { "ldarx",      0xfc0007fe, 0x7c0000a8, Op_D | Op_A | Op_B },
 242         { "dcbf",       0xfc0007fe, 0x7c0000ac, Op_A | Op_B },
 243         { "lbzx",       0xfc0007fe, 0x7c0000ae, Op_D | Op_A | Op_B },
 244         { "neg",        0xfc0003fe, 0x7c0000d0, Op_D | Op_A | Op_OE | Op_Rc },
 245         { "lbzux",      0xfc0007fe, 0x7c0000ee, Op_D | Op_A | Op_B },
 246         { "nor",        0xfc0007fe, 0x7c0000f8, Op_S | Op_A | Op_B | Op_Rc },
 247         { "wrtee",      0xfc0003ff, 0x7c000106, Op_S },
 248         { "subfe",      0xfc0003fe, 0x7c000110, Op_D | Op_A | Op_B | Op_OE | Op_Rc },
 249         { "adde",       0xfc0003fe, 0x7c000114, Op_D | Op_A | Op_B | Op_OE | Op_Rc },
 250         { "mtcrf",      0xfc0007fe, 0x7c000120, Op_S | Op_CRM },
 251         { "mtmsr",      0xfc0007fe, 0x7c000124, Op_S },
 252         { "stdx",       0xfc0007fe, 0x7c00012a, Op_ST | Op_A | Op_B },
 253         { "stwcx.",     0xfc0007ff, 0x7c00012d, Op_ST | Op_A | Op_B },
 254         { "stwx",       0xfc0007fe, 0x7c00012e, Op_ST | Op_A | Op_B },
 255         { "wrteei",     0xfc0003fe, 0x7c000146, 0 },    /* XXX: out of flags! */
 256         { "stdux",      0xfc0007fe, 0x7c00016a, Op_ST | Op_A | Op_B },
 257         { "stwux",      0xfc0007fe, 0x7c00016e, Op_ST | Op_A | Op_B },
 258         { "subfze",     0xfc0003fe, 0x7c000190, Op_D | Op_A | Op_OE | Op_Rc },
 259         { "addze",      0xfc0003fe, 0x7c000194, Op_D | Op_A | Op_OE | Op_Rc },
 260         { "mtsr",       0xfc0007fe, 0x7c0001a4, Op_S | Op_SR },
 261         { "stdcx.",     0xfc0007ff, 0x7c0001ad, Op_ST | Op_A | Op_B },
 262         { "stbx",       0xfc0007fe, 0x7c0001ae, Op_ST | Op_A | Op_B },
 263         { "subfme",     0xfc0003fe, 0x7c0001d0, Op_D | Op_A | Op_OE | Op_Rc },
 264         { "mulld",      0xfc0003fe, 0x7c0001d2, Op_D | Op_A | Op_B | Op_OE | Op_Rc },
 265         { "addme",      0xfc0003fe, 0x7c0001d4, Op_D | Op_A | Op_OE | Op_Rc },
 266         { "mullw",      0xfc0003fe, 0x7c0001d6, Op_D | Op_A | Op_B | Op_OE | Op_Rc },
 267         { "mtsrin",     0xfc0007fe, 0x7c0001e4, Op_S | Op_B },
 268         { "dcbtst",     0xfc0007fe, 0x7c0001ec, Op_A | Op_B },
 269         { "stbux",      0xfc0007fe, 0x7c0001ee, Op_ST | Op_A | Op_B },
 270         { "add",        0xfc0003fe, 0x7c000214, Op_D | Op_A | Op_B | Op_OE | Op_Rc },
 271         { "dcbt",       0xfc0007fe, 0x7c00022c, Op_A | Op_B },
 272         { "lhzx",       0xfc0007ff, 0x7c00022e, Op_D | Op_A | Op_B },
 273         { "eqv",        0xfc0007fe, 0x7c000238, Op_S | Op_A | Op_B | Op_Rc },
 274         { "tlbie",      0xfc0007fe, 0x7c000264, Op_B },
 275         { "eciwx",      0xfc0007fe, 0x7c00026c, Op_D | Op_A | Op_B },
 276         { "lhzux",      0xfc0007fe, 0x7c00026e, Op_D | Op_A | Op_B },
 277         { "xor",        0xfc0007fe, 0x7c000278, Op_S | Op_A | Op_B | Op_Rc },
 278         { "mfdcr",      0xfc0007fe, 0x7c000286, Op_D | Op_dcr },
 279         { "mfspr",      0xfc0007fe, 0x7c0002a6, Op_D | Op_spr },
 280         { "lwax",       0xfc0007fe, 0x7c0002aa, Op_D | Op_A | Op_B },
 281         { "lhax",       0xfc0007fe, 0x7c0002ae, Op_D | Op_A | Op_B },
 282         { "tlbia",      0xfc0007fe, 0x7c0002e4, 0 },
 283         { "mftb",       0xfc0007fe, 0x7c0002e6, Op_D | Op_tbr },
 284         { "lwaux",      0xfc0007fe, 0x7c0002ea, Op_D | Op_A | Op_B },
 285         { "lhaux",      0xfc0007fe, 0x7c0002ee, Op_D | Op_A | Op_B },
 286         { "sthx",       0xfc0007fe, 0x7c00032e, Op_ST | Op_A | Op_B },
 287         { "orc",        0xfc0007fe, 0x7c000338, Op_S | Op_A | Op_B | Op_Rc },
 288         { "ecowx",      0xfc0007fe, 0x7c00036c, Op_ST | Op_A | Op_B | Op_Rc },
 289         { "slbie",      0xfc0007fc, 0x7c000364, Op_B },
 290         { "sthux",      0xfc0007fe, 0x7c00036e, Op_ST | Op_A | Op_B },
 291         { "or",         0xfc0007fe, 0x7c000378, Op_S | Op_A | Op_B | Op_Rc },
 292         { "mtdcr",      0xfc0007fe, 0x7c000386, Op_S | Op_dcr },
 293         { "divdu",      0xfc0003fe, 0x7c000392, Op_D | Op_A | Op_B | Op_OE | Op_Rc },
 294         { "divwu",      0xfc0003fe, 0x7c000396, Op_D | Op_A | Op_B | Op_OE | Op_Rc },
 295         { "mtspr",      0xfc0007fe, 0x7c0003a6, Op_S | Op_spr },
 296         { "dcbi",       0xfc0007fe, 0x7c0003ac, Op_A | Op_B },
 297         { "nand",       0xfc0007fe, 0x7c0003b8, Op_S | Op_A | Op_B | Op_Rc },
 298         { "dcread",     0xfc0007fe, 0x7c0003cc, Op_D | Op_A | Op_B },
 299         { "divd",       0xfc0003fe, 0x7c0003d2, Op_S | Op_A | Op_B | Op_OE | Op_Rc },
 300         { "divw",       0xfc0003fe, 0x7c0003d6, Op_S | Op_A | Op_B | Op_OE | Op_Rc },
 301         { "slbia",      0xfc0003fe, 0x7c0003e4, Op_S | Op_A | Op_B | Op_OE | Op_Rc },
 302         { "mcrxr",      0xfc0007fe, 0x7c000400, Op_crfD },
 303         { "lswx",       0xfc0007fe, 0x7c00042a, Op_D | Op_A | Op_B },
 304         { "lwbrx",      0xfc0007fe, 0x7c00042c, Op_D | Op_A | Op_B },
 305         { "lfsx",       0xfc0007fe, 0x7c00042e, Op_D | Op_A | Op_B },
 306         { "srw",        0xfc0007fe, 0x7c000430, Op_S | Op_A | Op_B | Op_Rc },
 307         { "srd",        0xfc0007fe, 0x7c000436, Op_S | Op_A | Op_B | Op_Rc },
 308         { "tlbsync",    0xfc0007fe, 0x7c00046c, 0 },
 309         { "lfsux",      0xfc0007fe, 0x7c00046e, Op_D | Op_A | Op_B },
 310         { "mfsr",       0xfc0007fe, 0x7c0004a6, Op_D | Op_SR },
 311         { "lswi",       0xfc0007fe, 0x7c0004aa, Op_D | Op_A | Op_NB },
 312         { "sync",       0xfc6007fe, 0x7c0004ac, 0 },
 313         { "lwsync",     0xfc6007fe, 0x7c2004ac, 0 },
 314         { "ptesync",    0xfc6007fe, 0x7c4004ac, 0 },
 315         { "lfdx",       0xfc0007fe, 0x7c0004ae, Op_D | Op_A | Op_B },
 316         { "lfdux",      0xfc0007fe, 0x7c0004ee, Op_D | Op_A | Op_B },
 317         { "mfsrin",     0xfc0007fe, 0x7c000526, Op_D | Op_B },
 318         { "stswx",      0xfc0007fe, 0x7c00052a, Op_ST | Op_A | Op_B },
 319         { "stwbrx",     0xfc0007fe, 0x7c00052c, Op_ST | Op_A | Op_B },
 320         { "stfsx",      0xfc0007fe, 0x7c00052e, Op_ST | Op_A | Op_B },
 321         { "stfsux",     0xfc0007fe, 0x7c00056e, Op_ST | Op_A | Op_B },
 322         { "stswi",      0xfc0007fe, 0x7c0005aa, Op_ST | Op_A | Op_NB },
 323         { "stfdx",      0xfc0007fe, 0x7c0005ae, Op_ST | Op_A | Op_B },
 324         { "stfdux",     0xfc0007fe, 0x7c0005ee, Op_ST | Op_A | Op_B },
 325         { "lhbrx",      0xfc0007fe, 0x7c00062c, Op_D | Op_A | Op_B },
 326         { "sraw",       0xfc0007fe, 0x7c000630, Op_S | Op_A | Op_B },
 327         { "srad",       0xfc0007fe, 0x7c000634, Op_S | Op_A | Op_B | Op_Rc },
 328         { "srawi",      0xfc0007fe, 0x7c000670, Op_S | Op_A | Op_rSH | Op_Rc },
 329         { "sradi",      0xfc0007fc, 0x7c000674, Op_S | Op_A | Op_sh },
 330         { "eieio",      0xfc0007fe, 0x7c0006ac, 0 },
 331         { "tlbsx",      0xfc0007fe, 0x7c000724, Op_S | Op_A | Op_B | Op_Rc },
 332         { "sthbrx",     0xfc0007fe, 0x7c00072c, Op_ST | Op_A | Op_B },
 333         { "extsh",      0xfc0007fe, 0x7c000734, Op_S | Op_A | Op_Rc },
 334         { "tlbre",      0xfc0007fe, 0x7c000764, Op_D | Op_A | Op_WS },
 335         { "extsb",      0xfc0007fe, 0x7c000774, Op_S | Op_A | Op_Rc },
 336         { "icbi",       0xfc0007fe, 0x7c0007ac, Op_A | Op_B },
 337         { "tlbwe",      0xfc0007fe, 0x7c0007a4, Op_S | Op_A | Op_WS },
 338         { "stfiwx",     0xfc0007fe, 0x7c0007ae, Op_ST | Op_A | Op_B },
 339         { "extsw",      0xfc0007fe, 0x7c0007b4, Op_S | Op_A | Op_Rc },
 340         { "dcbz",       0xfc0007fe, 0x7c0007ec, Op_A | Op_B },
 341         { "",           0x0,            0x0, 0 }
 342 };
 343
 344 /* 3a * 4 = e8 */
 345 const struct opcode opcodes_3a[] = {
 346         { "ld",         0xfc000003, 0xe8000000, Op_D | Op_A | Op_ds },
 347         { "ldu",        0xfc000003, 0xe8000001, Op_D | Op_A | Op_ds },
 348         { "lwa",        0xfc000003, 0xe8000002, Op_D | Op_A | Op_ds },
 349         { "",           0x0,            0x0, 0 }
 350 };
 351 /* 3b * 4 = ec */
 352 const struct opcode opcodes_3b[] = {
 353         { "fdivs",      0xfc00003e, 0xec000024, Op_D | Op_A | Op_B | Op_Rc },
 354         { "fsubs",      0xfc00003e, 0xec000028, Op_D | Op_A | Op_B | Op_Rc },
 355
 356         { "fadds",      0xfc00003e, 0xec00002a, Op_D | Op_A | Op_B | Op_Rc },
 357         { "fsqrts",     0xfc00003e, 0xec00002c, Op_D | Op_B | Op_Rc },
 358         { "fres",       0xfc00003e, 0xec000030, Op_D | Op_B | Op_Rc },
 359         { "fmuls",      0xfc00003e, 0xec000032, Op_D | Op_A | Op_C | Op_Rc },
 360         { "fmsubs",     0xfc00003e, 0xec000038, Op_D | Op_A | Op_B | Op_C | Op_Rc },
 361         { "fmadds",     0xfc00003e, 0xec00003a, Op_D | Op_A | Op_B | Op_C | Op_Rc },
 362         { "fnmsubs",    0xfc00003e, 0xec00003c, Op_D | Op_A | Op_B | Op_C | Op_Rc },
 363         { "fnmadds",    0xfc00003e, 0xec00003e, Op_D | Op_A | Op_B | Op_C | Op_Rc },
 364         { "",           0x0,            0x0, 0 }
 365 };
 366 /* 3e * 4 = f8 */
 367 const struct opcode opcodes_3e[] = {
 368         { "std",        0xfc000003, 0xf8000000, Op_ST | Op_A | Op_ds },
 369         { "stdu",       0xfc000003, 0xf8000001, Op_ST | Op_A | Op_ds },
 370         { "",           0x0,            0x0, 0 }
 371 };
 372
 373 /* 3f * 4 = fc */
 374 const struct opcode opcodes_3f[] = {
 375         { "fcmpu",      0xfc0007fe, 0xfc000000, Op_crfD | Op_A | Op_B },
 376         { "frsp",       0xfc0007fe, 0xfc000018, Op_D | Op_B | Op_Rc },
 377         { "fctiw",      0xfc0007fe, 0xfc00001c, Op_D | Op_B | Op_Rc },
 378         { "fctiwz",     0xfc0007fe, 0xfc00001e, Op_D | Op_B | Op_Rc },
 379
 380         { "fdiv",       0xfc00003e, 0xfc000024, Op_D | Op_A | Op_B | Op_Rc },
 381         { "fsub",       0xfc00003e, 0xfc000028, Op_D | Op_A | Op_B | Op_Rc },
 382         { "fadd",       0xfc00003e, 0xfc00002a, Op_D | Op_A | Op_B | Op_Rc },
 383         { "fsqrt",      0xfc00003e, 0xfc00002c, Op_D | Op_B | Op_Rc },
 384         { "fsel",       0xfc00003e, 0xfc00002e, Op_D | Op_A | Op_B | Op_C | Op_Rc },
 385         { "fmul",       0xfc00003e, 0xfc000032, Op_D | Op_A | Op_C | Op_Rc },
 386         { "frsqrte",    0xfc00003e, 0xfc000034, Op_D | Op_B | Op_Rc },
 387         { "fmsub",      0xfc00003e, 0xfc000038, Op_D | Op_A | Op_B | Op_C | Op_Rc },
 388         { "fmadd",      0xfc00003e, 0xfc00003a, Op_D | Op_A | Op_B | Op_C | Op_Rc },
 389         { "fnmsub",     0xfc00003e, 0xfc00003c, Op_D | Op_A | Op_B | Op_C | Op_Rc },
 390         { "fnmadd",     0xfc00003e, 0xfc00003e, Op_D | Op_A | Op_B | Op_C | Op_Rc },
 391
 392         { "fcmpo",      0xfc0007fe, 0xfc000040, Op_crfD | Op_A | Op_B },
 393         { "mtfsb1",     0xfc0007fe, 0xfc00004c, Op_crfD | Op_Rc },
 394         { "fneg",       0xfc0007fe, 0xfc000050, Op_D | Op_B | Op_Rc },
 395         { "mcrfs",      0xfc0007fe, 0xfc000080, Op_D | Op_B | Op_Rc },
 396         { "mtfsb0",     0xfc0007fe, 0xfc00008c, Op_crfD | Op_Rc },
 397         { "fmr",        0xfc0007fe, 0xfc000090, Op_D | Op_B | Op_Rc },
 398         { "mtfsfi",     0xfc0007fe, 0xfc00010c, 0 },    /* XXX: out of flags! */
 399
 400         { "fnabs",      0xfc0007fe, 0xfc000110, Op_D | Op_B | Op_Rc },
 401         { "fabs",       0xfc0007fe, 0xfc000210, Op_D | Op_B | Op_Rc },
 402         { "mffs",       0xfc0007fe, 0xfc00048e, Op_D | Op_B | Op_Rc },
 403         { "mtfsf",      0xfc0007fe, 0xfc00058e, Op_FM | Op_B | Op_Rc },
 404         { "fctid",      0xfc0007fe, 0xfc00065c, Op_D | Op_B | Op_Rc },
 405         { "fctidz",     0xfc0007fe, 0xfc00065e, Op_D | Op_B | Op_Rc },
 406         { "fcfid",      0xfc0007fe, 0xfc00069c, Op_D | Op_B | Op_Rc },
 407         { "",           0x0,            0x0, 0 }
 408 };
 409
 410 struct specialreg {
 411         int reg;
 412         const char *name;
 413 };
 414
 415 const struct specialreg sprregs[] = {
 416         { 0x000, "mq" },
 417         { 0x001, "xer" },
 418         { 0x008, "lr" },
 419         { 0x009, "ctr" },
 420         { 0x012, "dsisr" },
 421         { 0x013, "dar" },
 422         { 0x016, "dec" },
 423         { 0x019, "sdr1" },
 424         { 0x01a, "srr0" },
 425         { 0x01b, "srr1" },
 426         { 0x100, "vrsave" },
 427         { 0x110, "sprg0" },
 428         { 0x111, "sprg1" },
 429         { 0x112, "sprg2" },
 430         { 0x113, "sprg3" },
 431         { 0x114, "sprg4" },
 432         { 0x115, "sprg5" },
 433         { 0x116, "sprg6" },
 434         { 0x117, "sprg7" },
 435         { 0x118, "asr" },
 436         { 0x11a, "aer" },
 437         { 0x11c, "tbl" },
 438         { 0x11d, "tbu" },
 439         { 0x11f, "pvr" },
 440         { 0x210, "ibat0u" },
 441         { 0x211, "ibat0l" },
 442         { 0x212, "ibat1u" },
 443         { 0x213, "ibat1l" },
 444         { 0x214, "ibat2u" },
 445         { 0x215, "ibat2l" },
 446         { 0x216, "ibat3u" },
 447         { 0x217, "ibat3l" },
 448         { 0x218, "dbat0u" },
 449         { 0x219, "dbat0l" },
 450         { 0x21a, "dbat1u" },
 451         { 0x21b, "dbat1l" },
 452         { 0x21c, "dbat2u" },
 453         { 0x21d, "dbat2l" },
 454         { 0x21e, "dbat3u" },
 455         { 0x21f, "dbat3l" },
 456         { 0x230, "ibat4u" },
 457         { 0x231, "ibat4l" },
 458         { 0x232, "ibat5u" },
 459         { 0x233, "ibat5l" },
 460         { 0x234, "ibat6u" },
 461         { 0x235, "ibat6l" },
 462         { 0x236, "ibat7u" },
 463         { 0x237, "ibat7l" },
 464         { 0x238, "dbat4u" },
 465         { 0x239, "dbat4l" },
 466         { 0x23a, "dbat5u" },
 467         { 0x23b, "dbat5l" },
 468         { 0x23c, "dbat6u" },
 469         { 0x23d, "dbat6l" },
 470         { 0x23e, "dbat7u" },
 471         { 0x23f, "dbat7l" },
 472         { 0x3b0, "zpr" },
 473         { 0x3b1, "pid" },
 474         { 0x3b3, "ccr0" },
 475         { 0x3b4, "iac3" },
 476         { 0x3b5, "iac4" },
 477         { 0x3b6, "dvc1" },
 478         { 0x3b7, "dvc2" },
 479         { 0x3b9, "sgr" },
 480         { 0x3ba, "dcwr" },
 481         { 0x3bb, "sler" },
 482         { 0x3bc, "su0r" },
 483         { 0x3bd, "dbcr1" },
 484         { 0x3d3, "icdbdr" },
 485         { 0x3d4, "esr" },
 486         { 0x3d5, "dear" },
 487         { 0x3d6, "evpr" },
 488         { 0x3d8, "tsr" },
 489         { 0x3da, "tcr" },
 490         { 0x3db, "pit" },
 491         { 0x3de, "srr2" },
 492         { 0x3df, "srr3" },
 493         { 0x3f0, "hid0" },
 494         { 0x3f1, "hid1" },
 495         { 0x3f2, "iabr" },
 496         { 0x3f3, "hid2" },
 497         { 0x3f5, "dabr" },
 498         { 0x3f6, "msscr0" },
 499         { 0x3f7, "msscr1" },
 500         { 0x3f9, "l2cr" },
 501         { 0x3fa, "dccr" },
 502         { 0x3fb, "iccr" },
 503         { 0x3ff, "pir" },
 504         { 0, NULL }
 505 };
 506
 507 const struct specialreg dcrregs[] = {
 508         { 0x010, "sdram0_cfgaddr" },
 509         { 0x011, "sdram0_cfgdata" },
 510         { 0x012, "ebc0_cfgaddr" },
 511         { 0x013, "ebc0_cfgdata" },
 512         { 0x014, "dcp0_cfgaddr" },
 513         { 0x015, "dcp0_cfgdata" },
 514         { 0x018, "ocm0_isarc" },
 515         { 0x019, "ocm0_iscntl" },
 516         { 0x01a, "ocm0_dsarc" },
 517         { 0x01b, "ocm0_dscntl" },
 518         { 0x084, "plb0_besr" },
 519         { 0x086, "plb0_bear" },
 520         { 0x087, "plb0_acr" },
 521         { 0x0a0, "pob0_besr0" },
 522         { 0x0a2, "pob0_bear" },
 523         { 0x0a4, "pob0_besr1" },
 524         { 0x0b0, "cpc0_pllmr" },
 525         { 0x0b1, "cpc0_cr0" },
 526         { 0x0b2, "cpc0_cr1" },
 527         { 0x0b4, "cpc0_psr" },
 528         { 0x0b5, "cpc0_jtagid" },
 529         { 0x0b8, "cpc0_sr" },
 530         { 0x0b9, "cpc0_er" },
 531         { 0x0ba, "cpc0_fr" },
 532         { 0x0c0, "uic0_sr" },
 533         { 0x0c2, "uic0_er" },
 534         { 0x0c3, "uic0_cr" },
 535         { 0x0c4, "uic0_pr" },
 536         { 0x0c5, "uic0_tr" },
 537         { 0x0c6, "uic0_msr" },
 538         { 0x0c7, "uic0_vr" },
 539         { 0x0c8, "uic0_vcr" },
 540         { 0x100, "dma0_cr0" },
 541         { 0x101, "dma0_ct0" },
 542         { 0x102, "dma0_da0" },
 543         { 0x103, "dma0_sa0" },
 544         { 0x104, "dma0_sg0" },
 545         { 0x108, "dma0_cr1" },
 546         { 0x109, "dma0_ct1" },
 547         { 0x10a, "dma0_da1" },
 548         { 0x10b, "dma0_sa1" },
 549         { 0x10c, "dma0_sg1" },
 550         { 0x110, "dma0_cr2" },
 551         { 0x111, "dma0_ct2" },
 552         { 0x112, "dma0_da2" },
 553         { 0x113, "dma0_sa2" },
 554         { 0x114, "dma0_sg2" },
 555         { 0x118, "dma0_cr3" },
 556         { 0x119, "dma0_ct3" },
 557         { 0x11a, "dma0_da3" },
 558         { 0x11b, "dma0_sa3" },
 559         { 0x11c, "dma0_sg3" },
 560         { 0x120, "dma0_sr" },
 561         { 0x123, "dma0_sgc" },
 562         { 0x125, "dma0_slp" },
 563         { 0x126, "dma0_pol" },
 564         { 0x180, "mal0_cfg" },
 565         { 0x181, "mal0_esr" },
 566         { 0x182, "mal0_ier" },
 567         { 0x184, "mal0_txcasr" },
 568         { 0x185, "mal0_txcarr" },
 569         { 0x186, "mal0_txeobisr" },
 570         { 0x187, "mal0_txdeir" },
 571         { 0x190, "mal0_rxcasr" },
 572         { 0x191, "mal0_rxcarr" },
 573         { 0x192, "mal0_rxeobisr" },
 574         { 0x193, "mal0_rxdeir" },
 575         { 0x1a0, "mal0_txctp0r" },
 576         { 0x1a1, "mal0_txctp1r" },
 577         { 0x1a2, "mal0_txctp2r" },
 578         { 0x1a3, "mal0_txctp3r" },
 579         { 0x1c0, "mal0_rxctp0r" },
 580         { 0x1e0, "mal0_rcbs0" },
 581         { 0, NULL }
 582 };
 583
 584 static const char *condstr[8] = {
 585         "ge", "le", "ne", "ns", "lt", "gt", "eq", "so"
 586 };
 587
 588 void
 589 op_ill(instr_t instr, vm_offset_t loc)
 590 {
 591         db_printf("illegal instruction %x\n", instr);
 592 }
 593
 594 u_int32_t
 595 extract_field(u_int32_t value, u_int32_t base, u_int32_t width)
 596 {
 597         u_int32_t mask = (1 << width) - 1;
 598         return ((value >> base) & mask);
 599 }
 600
 601 const struct opcode * search_op(const struct opcode *);
 602
 603 void
 604 disasm_fields(const struct opcode *popcode, instr_t instr, vm_offset_t loc,
 605         char *disasm_str, size_t slen)
 606 {
 607         char * pstr;
 608         enum function_mask func;
 609         int len;
 610
 611 #define ADD_LEN(s)      do { \
 612                 len = (s); \
 613                 slen -= len; \
 614                 pstr += len; \
 615         } while(0)
 616 #define APP_PSTR(fmt, arg)      ADD_LEN(snprintf(pstr, slen, (fmt), (arg)))
 617 #define APP_PSTRS(fmt)          ADD_LEN(snprintf(pstr, slen, "%s", (fmt)))
 618
 619         pstr = disasm_str;
 620
 621         func =  popcode->func;
 622         if (func & Op_BC) {
 623                 u_int BO, BI;
 624                 BO = extract_field(instr, 31 - 10, 5);
 625                 BI = extract_field(instr, 31 - 15, 5);
 626                 func &= ~Op_BC;
 627                 if (BO & 4) {
 628                         /* standard, no decrement */
 629                         if (BO & 16) {
 630                                 if (popcode->code == 0x40000000) {
 631                                         APP_PSTRS("c");
 632                                         func |= Op_BO | Op_BI;
 633                                 }
 634                         }
 635                         else {
 636                                 APP_PSTRS(condstr[((BO & 8) >> 1) + (BI & 3)]);
 637                                 if (BI >= 4)
 638                                         func |= Op_crfS;
 639                         }
 640                 }
 641                 else {
 642                         /* decrement and branch */
 643                         if (BO & 2)
 644                                 APP_PSTRS("dz");
 645                         else
 646                                 APP_PSTRS("dnz");
 647                         if ((BO & 24) == 0)
 648                                 APP_PSTRS("f");
 649                         else if ((BO & 24) == 8)
 650                                 APP_PSTRS("t");
 651                         else
 652                                 func |= Op_BI;
 653                 }
 654                 if (popcode->code == 0x4c000020)
 655                         APP_PSTRS("lr");
 656                 else if (popcode->code == 0x4c000420)
 657                         APP_PSTRS("ctr");
 658                 if ((BO & 20) != 20 && (func & Op_BO) == 0)
 659                         func |= Op_BP;  /* branch prediction hint */
 660         }
 661         if (func & Op_OE) {
 662                 u_int OE;
 663                 OE = extract_field(instr, 31 - 21, 1);
 664                 if (OE) {
 665                         APP_PSTRS("o");
 666                 }
 667                 func &= ~Op_OE;
 668         }
 669         switch (func & Op_LKM) {
 670         case Op_Rc:
 671                 if (instr & 0x1)
 672                         APP_PSTRS(".");
 673                 break;
 674         case Op_AA:
 675                 if (instr & 0x1)
 676                         APP_PSTRS("l");
 677                 if (instr & 0x2) {
 678                         APP_PSTRS("a");
 679                         loc = 0; /* Absolute address */
 680                 }
 681                 break;
 682         case Op_LK:
 683                 if (instr & 0x1)
 684                         APP_PSTRS("l");
 685                 break;
 686         default:
 687                 func &= ~Op_LKM;
 688         }
 689         if (func & Op_BP) {
 690                 int y;
 691                 y = (instr & 0x200000) != 0;
 692                 if (popcode->code == 0x40000000) {
 693                         int BD;
 694                         BD = extract_field(instr, 31 - 29, 14);
 695                         BD = BD << 18;
 696                         BD = BD >> 16;
 697                         BD += loc;
 698                         if ((vm_offset_t)BD < loc)
 699                                 y ^= 1;
 700                 }
 701                 APP_PSTR("%c", y ? '+' : '-');
 702                 func &= ~Op_BP;
 703         }
 704         APP_PSTRS("\t");
 705
 706         /* XXX: special cases here, out of flags in a 32bit word. */
 707         if (strcmp(popcode->name, "wrteei") == 0) {
 708                 int E;
 709                 E = extract_field(instr, 31 - 16, 5);
 710                 APP_PSTR("%d", E);
 711                 return;
 712         }
 713         else if (strcmp(popcode->name, "mtfsfi") == 0) {
 714                 u_int UI;
 715                 UI = extract_field(instr, 31 - 8, 3);
 716                 APP_PSTR("crf%u, ", UI);
 717                 UI = extract_field(instr, 31 - 19, 4);
 718                 APP_PSTR("0x%x", UI);
 719         }
 720         /* XXX: end of special cases here. */
 721
 722         if ((func & Op_FM) == Op_FM) {
 723                 u_int FM;
 724                 FM = extract_field(instr, 31 - 14, 8);
 725                 APP_PSTR("0x%x, ", FM);
 726                 func &= ~Op_FM;
 727         }
 728         if (func & Op_D) {  /* Op_ST is the same */
 729                 u_int D;
 730                 D = extract_field(instr, 31 - 10, 5);
 731                 APP_PSTR("r%d, ", D);
 732                 func &= ~Op_D;
 733         }
 734         if (func & Op_crbD) {
 735                 u_int crbD;
 736                 crbD = extract_field(instr, 31 - 10, 5);
 737                 APP_PSTR("crb%d, ", crbD);
 738                 func &= ~Op_crbD;
 739         }
 740         if (func & Op_crfD) {
 741                 u_int crfD;
 742                 crfD = extract_field(instr, 31 - 8, 3);
 743                 APP_PSTR("crf%d, ", crfD);
 744                 func &= ~Op_crfD;
 745         }
 746         if (func & Op_TO) {
 747                 u_int TO;
 748                 TO = extract_field(instr, 31 - 10, 1);
 749                 APP_PSTR("%d, ", TO);
 750                 func &= ~Op_TO;
 751         }
 752         if (func & Op_crfS) {
 753                 u_int crfS;
 754                 crfS = extract_field(instr, 31 - 13, 3);
 755                 APP_PSTR("crf%d, ", crfS);
 756                 func &= ~Op_crfS;
 757         }
 758         if (func & Op_CRM) {
 759                 u_int CRM;
 760                 CRM = extract_field(instr, 31 - 19, 8);
 761                 APP_PSTR("0x%x, ", CRM);
 762                 func &= ~Op_CRM;
 763         }
 764         if (func & Op_BO) {
 765                 u_int BO;
 766                 BO = extract_field(instr, 31 - 10, 5);
 767                 APP_PSTR("%d, ", BO);
 768                 func &= ~Op_BO;
 769         }
 770         if (func & Op_BI) {
 771                 u_int BI;
 772                 BI = extract_field(instr, 31 - 15, 5);
 773                 APP_PSTR("%d, ", BI);
 774                 func &= ~Op_BI;
 775         }
 776         if (func & Op_dA) {  /* register A indirect with displacement */
 777                 u_int A;
 778                 A = extract_field(instr, 31 - 31, 16);
 779                 if (A & 0x8000) {
 780                         APP_PSTRS("-");
 781                         A = 0x10000-A;
 782                 }
 783                 APP_PSTR("0x%x", A);
 784                 A = extract_field(instr, 31 - 15, 5);
 785                 APP_PSTR("(r%d)", A);
 786                 func &= ~Op_dA;
 787         }
 788         if (func & Op_spr) {
 789                 u_int spr;
 790                 u_int sprl;
 791                 u_int sprh;
 792                 const struct specialreg *regs;
 793                 int i;
 794                 sprl = extract_field(instr, 31 - 15, 5);
 795                 sprh = extract_field(instr, 31 - 20, 5);
 796                 spr = sprh << 5 | sprl;
 797
 798                 /* ugly hack - out of bitfields in the function mask */
 799                 if (popcode->name[2] == 'd')    /* m.Dcr */
 800                         regs = dcrregs;
 801                 else
 802                         regs = sprregs;
 803                 for (i = 0; regs[i].name != NULL; i++)
 804                         if (spr == regs[i].reg)
 805                                 break;
 806                 if (regs[i].name == NULL)
 807                         APP_PSTR("[unknown special reg (%d)]", spr);
 808                 else
 809                         APP_PSTR("%s", regs[i].name);
 810
 811                 if (popcode->name[1] == 't')    /* spr is destination */
 812                         APP_PSTRS(", ");
 813                 func &= ~Op_spr;
 814         }
 815         if (func & Op_SR) {
 816                 u_int SR;
 817                 SR = extract_field(instr, 31 - 15, 3);
 818                 APP_PSTR("sr%d", SR);
 819                 if (popcode->name[1] == 't')    /* SR is destination */
 820                         APP_PSTRS(", ");
 821                 func &= ~Op_SR;
 822         }
 823         if (func & Op_A) {
 824                 u_int A;
 825                 A = extract_field(instr, 31 - 15, 5);
 826                 APP_PSTR("r%d, ", A);
 827                 func &= ~Op_A;
 828         }
 829         if (func & Op_S) {
 830                 u_int D;
 831                 D = extract_field(instr, 31 - 10, 5);
 832                 APP_PSTR("r%d, ", D);
 833                 func &= ~Op_S;
 834         }
 835         if (func & Op_C) {
 836                 u_int C;
 837                 C = extract_field(instr, 31 - 25, 5);
 838                 APP_PSTR("r%d, ", C);
 839                 func &= ~Op_C;
 840         }
 841         if (func & Op_B) {
 842                 u_int B;
 843                 B = extract_field(instr, 31 - 20, 5);
 844                 APP_PSTR("r%d", B);
 845                 func &= ~Op_B;
 846         }
 847         if (func & Op_crbA) {
 848                 u_int crbA;
 849                 crbA = extract_field(instr, 31 - 15, 5);
 850                 APP_PSTR("%d, ", crbA);
 851                 func &= ~Op_crbA;
 852         }
 853         if (func & Op_crbB) {
 854                 u_int crbB;
 855                 crbB = extract_field(instr, 31 - 20, 5);
 856                 APP_PSTR("%d, ", crbB);
 857                 func &= ~Op_crbB;
 858         }
 859         if (func & Op_LI) {
 860                 int LI;
 861                 LI = extract_field(instr, 31 - 29, 24);
 862                 LI = LI << 8;
 863                 LI = LI >> 6;
 864                 LI += loc;
 865                 APP_PSTR("0x%x", LI);
 866                 func &= ~Op_LI;
 867         }
 868         switch (func & Op_SIMM) {
 869                 u_int IMM;
 870         case Op_SIMM: /* same as Op_d */
 871                 IMM = extract_field(instr, 31 - 31, 16);
 872                 if (IMM & 0x8000) {
 873                         APP_PSTRS("-");
 874                         IMM = 0x10000-IMM;
 875                 }
 876                 func &= ~Op_SIMM;
 877                 goto common;
 878         case Op_UIMM:
 879                 IMM = extract_field(instr, 31 - 31, 16);
 880                 func &= ~Op_UIMM;
 881                 goto common;
 882         common:
 883                 APP_PSTR("0x%x", IMM);
 884                 break;
 885         default:
 886                 ;
 887         }
 888         if (func & Op_BD) {
 889                 int BD;
 890                 BD = extract_field(instr, 31 - 29, 14);
 891                 BD = BD << 18;
 892                 BD = BD >> 16;
 893                 BD += loc;
 894                 /* Need to sign extend and shift up 2, then add addr */
 895                 APP_PSTR("0x%x", BD);
 896                 func &= ~Op_BD;
 897         }
 898         if (func & Op_ds) {
 899                 u_int ds;
 900                 ds = extract_field(instr, 31 - 29, 14) << 2;
 901                 APP_PSTR("0x%x", ds);
 902                 func &= ~Op_ds;
 903         }
 904         if (func & Op_me) {
 905                 u_int me, mel, meh;
 906                 mel = extract_field(instr, 31 - 25, 4);
 907                 meh = extract_field(instr, 31 - 26, 1);
 908                 me = meh << 4 | mel;
 909                 APP_PSTR(", 0x%x", me);
 910                 func &= ~Op_me;
 911         }
 912         if ((func & Op_SH) && (func & Op_sh_mb_sh)) {
 913                 u_int SH;
 914                 SH = extract_field(instr, 31 - 20, 5);
 915                 APP_PSTR("%d", SH);
 916         }
 917         if ((func & Op_MB) && (func & Op_sh_mb_sh)) {
 918                 u_int MB;
 919                 u_int ME;
 920                 MB = extract_field(instr, 31 - 25, 5);
 921                 APP_PSTR(", %d", MB);
 922                 ME = extract_field(instr, 31 - 30, 5);
 923                 APP_PSTR(", %d", ME);
 924         }
 925         if ((func & Op_sh) && ! (func & Op_sh_mb_sh)) {
 926                 u_int sh, shl, shh;
 927                 shl = extract_field(instr, 31 - 19, 4);
 928                 shh = extract_field(instr, 31 - 20, 1);
 929                 sh = shh << 4 | shl;
 930                 APP_PSTR(", %d", sh);
 931         }
 932         if ((func & Op_mb) && ! (func & Op_sh_mb_sh)) {
 933                 u_int mb, mbl, mbh;
 934                 mbl = extract_field(instr, 31 - 25, 4);
 935                 mbh = extract_field(instr, 31 - 26, 1);
 936                 mb = mbh << 4 | mbl;
 937                 APP_PSTR(", %d", mb);
 938         }
 939         if ((func & Op_me) && ! (func & Op_sh_mb_sh)) {
 940                 u_int me, mel, meh;
 941                 mel = extract_field(instr, 31 - 25, 4);
 942                 meh = extract_field(instr, 31 - 26, 1);
 943                 me = meh << 4 | mel;
 944                 APP_PSTR(", %d", me);
 945         }
 946         if (func & Op_tbr) {
 947                 u_int tbr;
 948                 u_int tbrl;
 949                 u_int tbrh;
 950                 const char *reg;
 951                 tbrl = extract_field(instr, 31 - 15, 5);
 952                 tbrh = extract_field(instr, 31 - 20, 5);
 953                 tbr = tbrh << 5 | tbrl;
 954
 955                 switch (tbr) {
 956                 case 268:
 957                         reg = "tbl";
 958                         break;
 959                 case 269:
 960                         reg = "tbu";
 961                         break;
 962                 default:
 963                         reg = NULL;
 964                 }
 965                 if (reg == NULL)
 966                         APP_PSTR(", [unknown tbr %d ]", tbr);
 967                 else
 968                         APP_PSTR(", %s", reg);
 969                 func &= ~Op_tbr;
 970         }
 971         if (func & Op_NB) {
 972                 u_int NB;
 973                 NB = extract_field(instr, 31 - 20, 5);
 974                 if (NB == 0)
 975                         NB = 32;
 976                 APP_PSTR(", %d", NB);
 977                 func &= ~Op_SR;
 978         }
 979 #undef ADD_LEN
 980 #undef APP_PSTR
 981 #undef APP_PSTRS
 982 }
 983
 984 void
 985 op_base(instr_t instr, vm_offset_t loc)
 986 {
 987         dis_ppc(opcodes, instr, loc);
 988 }
 989
 990 void
 991 op_cl_x13(instr_t instr, vm_offset_t loc)
 992 {
 993         dis_ppc(opcodes_13, instr, loc);
 994 }
 995
 996 void
 997 op_cl_x1e(instr_t instr, vm_offset_t loc)
 998 {
 999         dis_ppc(opcodes_1e, instr, loc);
1000 }
1001
1002 void
1003 op_cl_x1f(instr_t instr, vm_offset_t loc)
1004 {
1005         dis_ppc(opcodes_1f, instr, loc);
1006 }
1007
1008 void
1009 op_cl_x3a(instr_t instr, vm_offset_t loc)
1010 {
1011         dis_ppc(opcodes_3a, instr, loc);
1012 }
1013
1014 void
1015 op_cl_x3b(instr_t instr, vm_offset_t loc)
1016 {
1017         dis_ppc(opcodes_3b, instr, loc);
1018 }
1019
1020 void
1021 op_cl_x3e(instr_t instr, vm_offset_t loc)
1022 {
1023         dis_ppc(opcodes_3e, instr, loc);
1024 }
1025
1026 void
1027 op_cl_x3f(instr_t instr, vm_offset_t loc)
1028 {
1029         dis_ppc(opcodes_3f, instr, loc);
1030 }
1031
1032 void
1033 dis_ppc(const struct opcode *opcodeset, instr_t instr, vm_offset_t loc)
1034 {
1035         const struct opcode *op;
1036         int found = 0;
1037         int i;
1038         char disasm_str[80];
1039
1040         for (i = 0, op = &opcodeset[0];
1041             found == 0 && op->mask != 0;
1042             i++, op = &opcodeset[i]) {
1043                 if ((instr & op->mask) == op->code) {
1044                         found = 1;
1045                         disasm_fields(op, instr, loc, disasm_str,
1046                                 sizeof disasm_str);
1047                         db_printf("%s%s\n", op->name, disasm_str);
1048                         return;
1049                 }
1050         }
1051         op_ill(instr, loc);
1052 }
1053
1054 db_addr_t
1055 db_disasm(db_addr_t loc, bool extended)
1056 {
1057         int class;
1058         instr_t opcode;
1059         opcode = *(instr_t *)(loc);
1060         if (extended)
1061                 db_printf("|%08x| ", opcode);
1062         class = opcode >> 26;
1063         (opcodes_base[class])(opcode, loc);
1064
1065         return (loc + 4);
1066 }
1067
1068 vm_offset_t opc_disasm(vm_offset_t loc, int);
1069
1070 vm_offset_t
1071 opc_disasm(vm_offset_t loc, int xin)
1072 {
1073         int class;
1074         instr_t opcode;
1075         opcode = xin;
1076         class = opcode >> 26;
1077         (opcodes_base[class])(opcode, loc);
1078
1079         return (loc + 4);
1080 }