/* * Sega Model 3 Emulator * Copyright (C) 2003 Bart Trzynadlowski, Ville Linde, Stefano Teso * * This program is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License Version 2 as published * by the Free Software Foundation. * * This program is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY * or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * for more details. * * You should have received a copy of the GNU General Public License along * with this program (license.txt); if not, write to the Free Software * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA */ /* * disasm.c * * PowerPC 603e disassembler. * * When possible, invalid forms of instructions are checked for. To the best * of my knowledge, all appropriate load/store instructions are checked. I'm * not sure whether any other kinds of instructions need checking. */ #include #include #ifdef STANDALONE #include #endif #include "model3.h" #define DISASM_VERSION "1.0" /* * Masks * * These masks isolate fields in an instruction word. */ #define M_LI 0x03fffffc #define M_AA 0x00000002 #define M_LK 0x00000001 #define M_BO 0x03e00000 #define M_BI 0x001f0000 #define M_BD 0x0000fffc #define M_RT 0x03e00000 #define M_RA 0x001f0000 #define M_RB 0x0000f800 #define M_CRFD 0x03800000 #define M_L 0x00200000 #define M_TO 0x03e00000 #define M_D 0x0000ffff #define M_SIMM 0x0000ffff #define M_UIMM 0x0000ffff #define M_NB 0x0000f800 #define M_SR 0x000f0000 #define M_SH 0x0000f800 #define M_CRFS 0x001c0000 #define M_IMM 0x0000f000 #define M_CRBD 0x03e00000 #define M_RC 0x00000001 #define M_CRBA 0x001f0000 #define M_CRBB 0x0000f800 #define M_SPR 0x001FF800 #define M_TBR 0x001FF800 #define M_CRM 0x000FF000 #define M_FM 0x01FE0000 #define M_OE 0x00000400 #define M_REGC 0x000007c0 #define M_MB 0x000007c0 #define M_ME 0x0000003e #define M_XO 0x000007fe /* * Field Defining Macros * * These macros generate instruction words with their associated fields filled * in with the passed value. */ #define D_OP(op) ((op & 0x3f) << 26) #define D_XO(xo) ((xo & 0x3ff) << 1) #define D_RT(r) ((r & 0x1f) << (31 - 10)) #define D_RA(r) ((r & 0x1f) << (31 - 15)) #define D_UIMM(u) (u & 0xffff) /* * Macros to Get Field Values * * These macros return the values of fields in an opcode. They all return * unsigned values and do not perform any sign extensions. */ #define G_RT(op) ((op & M_RT) >> (31 - 10)) #define G_RA(op) ((op & M_RA) >> (31 - 15)) #define G_RB(op) ((op & M_RB) >> (31 - 20)) #define G_SIMM(op) (op & M_SIMM) #define G_UIMM(op) (op & M_UIMM) #define G_LI(op) ((op & M_LI) >> 2) #define G_BO(op) ((op & M_BO) >> (31 - 10)) #define G_BI(op) ((op & M_BI) >> (31 - 15)) #define G_BD(op) ((op & M_BD) >> 2) #define G_CRFD(op) ((op & M_CRFD) >> (31 - 8)) #define G_L(op) ((op & M_L) >> (31 - 10)) #define G_CRBD(op) ((op & M_CRBD) >> (31 - 10)) #define G_CRBA(op) ((op & M_CRBA) >> (31 - 15)) #define G_CRBB(op) ((op & M_CRBB) >> (31 - 20)) #define G_REGC(op) ((op & M_REGC) >> (31 - 25)) #define G_D(op) (op & M_D) #define G_NB(op) ((op & M_NB) >> (31 - 20)) #define G_CRFS(op) ((op & M_CRFS) >> (31 - 13)) #define G_SPR(op) ((op & M_SPR) >> (31 - 20)) #define G_SR(op) ((op & M_SR) >> (31 - 15)) #define G_CRM(op) ((op & M_CRM) >> (31 - 19)) #define G_FM(op) ((op & M_FM) >> (31 - 14)) #define G_IMM(op) ((op & M_IMM) >> (31 - 19)) #define G_SH(op) ((op & M_SH) >> (31 - 20)) #define G_MB(op) ((op & M_MB) >> (31 - 25)) #define G_ME(op) ((op & M_ME) >> 1) #define G_TO(op) ((op & M_TO) >> (31 - 10)) /* * Operand Formats * * These convey information on what operand fields are present and how they * ought to be printed. * * I'm fairly certain all of these are used, but that is not guaranteed. */ enum { F_NONE, // F_LI, // LI*4+PC if AA=0 else LI*4 F_BCx, // BO, BI, target_addr used only by BCx F_RT_RA_0_SIMM, // rT, rA|0, SIMM rA|0 means if rA == 0, print 0 F_ADDIS, // rT, rA, SIMM (printed as unsigned) only used by ADDIS F_RT_RA_SIMM, // rT, rA, SIMM F_RA_RT_UIMM, // rA, rT, UIMM F_CMP_SIMM, // crfD, L, A, SIMM F_CMP_UIMM, // crfD, L, A, UIMM F_RT_RA_0_RB, // rT, rA|0, rB F_RT_RA_RB, // rT, rA, rB F_RT_D_RA_0, // rT, d(rA|0) F_RT_D_RA, // rT, d(rA) F_RA_RT_RB, // rA, rT, rB F_FRT_D_RA_0, // frT, d(RA|0) F_FRT_D_RA, // frT, d(RA) F_FRT_RA_0_RB, // frT, rA|0, rB F_FRT_RA_RB, // frT, rA, rB F_TWI, // TO, rA, SIMM only used by TWI instruction F_CMP, // crfD, L, rA, rB F_RA_RT, // rA, rT F_RA_0_RB, // rA|0, rB F_FRT_FRB, // frT, frB F_FCMP, // crfD, frA, frB F_CRFD_CRFS, // crfD, crfS F_MCRXR, // crfD only used by MCRXR F_RT, // rT F_MFSR, // rT, SR only used by MFSR F_MTSR, // SR, rT only used by MTSR F_MFFSx, // frT only used by MFFSx F_FCRBD, // crbD FPSCR[crbD] F_MTFSFIx, // crfD, IMM only used by MTFSFIx F_RB, // rB F_TW, // TO, rA, rB only used by TW F_RT_RA_0_NB, // rT, rA|0, NB print 32 if NB == 0 F_SRAWIx, // rA, rT, SH only used by SRAWIx F_BO_BI, // BO, BI F_CRBD_CRBA_CRBB, // crbD, crbA, crbB F_RT_SPR, // rT, SPR and TBR F_MTSPR, // SPR, rT only used by MTSPR F_MTCRF, // CRM, rT only used by MTCRF F_MTFSFx, // FM, frB only used by MTFSFx F_RT_RA, // rT, rA F_FRT_FRA_FRC_FRB, // frT, frA, frC, frB F_FRT_FRA_FRB, // frT, frA, frB F_FRT_FRA_FRC, // frT, frA, frC F_RA_RT_SH_MB_ME, // rA, rT, SH, MB, ME F_RLWNMx, // rT, rA, rB, MB, ME only used by RLWNMx F_RT_RB, // rT, rB }; /* * Flags */ #define FL_OE (1 << 0) // if there is an OE field #define FL_RC (1 << 1) // if there is an RC field #define FL_LK (1 << 2) // if there is an LK field #define FL_AA (1 << 3) // if there is an AA field #define FL_CHECK_RA_RT (1 << 4) // assert rA!=0 and rA!=rT #define FL_CHECK_RA (1 << 5) // assert rA!=0 #define FL_CHECK_LSWI (1 << 6) // specific check for LSWI validity #define FL_CHECK_LSWX (1 << 7) // specific check for LSWX validity /* * Instruction Descriptor * * Describes the layout of an instruction. */ typedef struct { CHAR *mnem; // mnemonic UINT32 match; // bit pattern of instruction after it has been masked UINT32 mask; // mask of variable fields (AND with ~mask to compare w/ // bit pattern to determine a match) INT format; // operand format FLAGS flags; // flags } IDESCR; /* * Instruction Table * * Table of instruction descriptors which allows the disassembler to decode * and print instructions. */ static IDESCR itab[] = { { "add", D_OP(31)|D_XO(266), M_RT|M_RA|M_RB|M_OE|M_RC, F_RT_RA_RB, FL_OE|FL_RC }, { "addc", D_OP(31)|D_XO(10), M_RT|M_RA|M_RB|M_OE|M_RC, F_RT_RA_RB, FL_OE|FL_RC }, { "adde", D_OP(31)|D_XO(138), M_RT|M_RA|M_RB|M_OE|M_RC, F_RT_RA_RB, FL_OE|FL_RC }, { "addi", D_OP(14), M_RT|M_RA|M_SIMM, F_RT_RA_0_SIMM, 0 }, { "addic", D_OP(12), M_RT|M_RA|M_SIMM, F_RT_RA_SIMM, 0 }, { "addic.", D_OP(13), M_RT|M_RA|M_SIMM, F_RT_RA_SIMM, 0 }, { "addis", D_OP(15), M_RT|M_RA|M_SIMM, F_ADDIS, 0 }, { "addme", D_OP(31)|D_XO(234), M_RT|M_RA|M_OE|M_RC, F_RT_RA, FL_OE|FL_RC }, { "addze", D_OP(31)|D_XO(202), M_RT|M_RA|M_OE|M_RC, F_RT_RA, FL_OE|FL_RC }, { "and", D_OP(31)|D_XO(28), M_RT|M_RA|M_RB|M_RC, F_RA_RT_RB, FL_RC }, { "andc", D_OP(31)|D_XO(60), M_RT|M_RA|M_RB|M_RC, F_RA_RT_RB, FL_RC }, { "andi.", D_OP(28), M_RT|M_RA|M_UIMM, F_RA_RT_UIMM, 0 }, { "andis.", D_OP(29), M_RT|M_RA|M_UIMM, F_RA_RT_UIMM, 0 }, { "b", D_OP(18), M_LI|M_AA|M_LK, F_LI, FL_AA|FL_LK }, { "bc", D_OP(16), M_BO|M_BI|M_BD|M_AA|M_LK, F_BCx, FL_AA|FL_LK }, { "bcctr", D_OP(19)|D_XO(528), M_BO|M_BI|M_LK, F_BO_BI, FL_LK }, { "bclr", D_OP(19)|D_XO(16), M_BO|M_BI|M_LK, F_BO_BI, FL_LK }, { "cmp", D_OP(31)|D_XO(0), M_CRFD|M_L|M_RA|M_RB, F_CMP, 0 }, { "cmpi", D_OP(11), M_CRFD|M_L|M_RA|M_SIMM, F_CMP_SIMM, 0 }, { "cmpl", D_OP(31)|D_XO(32), M_CRFD|M_L|M_RA|M_RB, F_CMP, 0 }, { "cmpli", D_OP(10), M_CRFD|M_L|M_RA|M_UIMM, F_CMP_UIMM, 0 }, { "cntlzw", D_OP(31)|D_XO(26), M_RT|M_RA|M_RC, F_RA_RT, FL_RC }, { "crand", D_OP(19)|D_XO(257), M_CRBD|M_CRBA|M_CRBB, F_CRBD_CRBA_CRBB, 0 }, { "crandc", D_OP(19)|D_XO(129), M_CRBD|M_CRBA|M_CRBB, F_CRBD_CRBA_CRBB, 0 }, { "creqv", D_OP(19)|D_XO(289), M_CRBD|M_CRBA|M_CRBB, F_CRBD_CRBA_CRBB, 0 }, { "crnand", D_OP(19)|D_XO(225), M_CRBD|M_CRBA|M_CRBB, F_CRBD_CRBA_CRBB, 0 }, { "crnor", D_OP(19)|D_XO(33), M_CRBD|M_CRBA|M_CRBB, F_CRBD_CRBA_CRBB, 0 }, { "cror", D_OP(19)|D_XO(449), M_CRBD|M_CRBA|M_CRBB, F_CRBD_CRBA_CRBB, 0 }, { "crorc", D_OP(19)|D_XO(417), M_CRBD|M_CRBA|M_CRBB, F_CRBD_CRBA_CRBB, 0 }, { "crxor", D_OP(19)|D_XO(193), M_CRBD|M_CRBA|M_CRBB, F_CRBD_CRBA_CRBB, 0 }, { "dcba", D_OP(31)|D_XO(758), M_RA|M_RB, F_RA_0_RB, 0 }, { "dcbf", D_OP(31)|D_XO(86), M_RA|M_RB, F_RA_0_RB, 0 }, { "dcbi", D_OP(31)|D_XO(470), M_RA|M_RB, F_RA_0_RB, 0 }, { "dcbst", D_OP(31)|D_XO(54), M_RA|M_RB, F_RA_0_RB, 0 }, { "dcbt", D_OP(31)|D_XO(278), M_RA|M_RB, F_RA_0_RB, 0 }, { "dcbtst", D_OP(31)|D_XO(246), M_RA|M_RB, F_RA_0_RB, 0 }, { "dcbz", D_OP(31)|D_XO(1014),M_RA|M_RB, F_RA_0_RB, 0 }, { "divw", D_OP(31)|D_XO(491), M_RT|M_RA|M_RB|M_OE|M_RC, F_RT_RA_RB, FL_OE|FL_RC }, { "divwu", D_OP(31)|D_XO(459), M_RT|M_RA|M_RB|M_OE|M_RC, F_RT_RA_RB, FL_OE|FL_RC }, { "eciwx", D_OP(31)|D_XO(310), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "ecowx", D_OP(31)|D_XO(438), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "eieio", D_OP(31)|D_XO(854), 0, F_NONE, 0 }, { "eqv", D_OP(31)|D_XO(284), M_RT|M_RA|M_RB|M_RC, F_RA_RT_RB, FL_RC }, { "extsb", D_OP(31)|D_XO(954), M_RT|M_RA|M_RC, F_RA_RT, FL_RC }, { "extsh", D_OP(31)|D_XO(922), M_RT|M_RA|M_RC, F_RA_RT, FL_RC }, { "fabs", D_OP(63)|D_XO(264), M_RT|M_RB|M_RC, F_FRT_FRB, FL_RC }, { "fadd", D_OP(63)|D_XO(21), M_RT|M_RA|M_RB|M_RC, F_FRT_FRA_FRB, FL_RC }, { "fadds", D_OP(59)|D_XO(21), M_RT|M_RA|M_RB|M_RC, F_FRT_FRA_FRB, FL_RC }, { "fcmpo", D_OP(63)|D_XO(32), M_CRFD|M_RA|M_RB, F_FCMP, 0 }, { "fcmpu", D_OP(63)|D_XO(0), M_CRFD|M_RA|M_RB, F_FCMP, 0 }, { "fctiw", D_OP(63)|D_XO(14), M_RT|M_RB|M_RC, F_FRT_FRB, FL_RC }, { "fctiwz", D_OP(63)|D_XO(15), M_RT|M_RB|M_RC, F_FRT_FRB, FL_RC }, { "fdiv", D_OP(63)|D_XO(18), M_RT|M_RA|M_RB|M_RC, F_FRT_FRA_FRB, FL_RC }, { "fdivs", D_OP(59)|D_XO(18), M_RT|M_RA|M_RB|M_RC, F_FRT_FRA_FRB, FL_RC }, { "fmadd", D_OP(63)|D_XO(29), M_RT|M_RA|M_RB|M_REGC|M_RC, F_FRT_FRA_FRC_FRB, FL_RC }, { "fmadds", D_OP(59)|D_XO(29), M_RT|M_RA|M_RB|M_REGC|M_RC, F_FRT_FRA_FRC_FRB, FL_RC }, { "fmr", D_OP(63)|D_XO(72), M_RT|M_RB|M_RC, F_FRT_FRB, FL_RC }, { "fmsub", D_OP(63)|D_XO(28), M_RT|M_RA|M_RB|M_REGC|M_RC, F_FRT_FRA_FRC_FRB, FL_RC }, { "fmsubs", D_OP(59)|D_XO(28), M_RT|M_RA|M_RB|M_REGC|M_RC, F_FRT_FRA_FRC_FRB, FL_RC }, { "fmul", D_OP(63)|D_XO(25), M_RT|M_RA|M_REGC|M_RC, F_FRT_FRA_FRC, FL_RC }, { "fmuls", D_OP(59)|D_XO(25), M_RT|M_RA|M_REGC|M_RC, F_FRT_FRA_FRC, FL_RC }, { "fnabs", D_OP(63)|D_XO(136), M_RT|M_RB|M_RC, F_FRT_FRB, FL_RC }, { "fneg", D_OP(63)|D_XO(40), M_RT|M_RB|M_RC, F_FRT_FRB, FL_RC }, { "fnmadd", D_OP(63)|D_XO(31), M_RT|M_RA|M_RB|M_REGC|M_RC, F_FRT_FRA_FRC_FRB, FL_RC }, { "fnmadds",D_OP(59)|D_XO(31), M_RT|M_RA|M_RB|M_REGC|M_RC, F_FRT_FRA_FRC_FRB, FL_RC }, { "fnmsub", D_OP(63)|D_XO(30), M_RT|M_RA|M_RB|M_REGC|M_RC, F_FRT_FRA_FRC_FRB, FL_RC }, { "fnmsubs",D_OP(59)|D_XO(30), M_RT|M_RA|M_RB|M_REGC|M_RC, F_FRT_FRA_FRC_FRB, FL_RC }, { "fres", D_OP(59)|D_XO(24), M_RT|M_RB|M_RC, F_FRT_FRB, FL_RC }, { "frsp", D_OP(63)|D_XO(12), M_RT|M_RB|M_RC, F_FRT_FRB, FL_RC }, { "frsqrte",D_OP(63)|D_XO(26), M_RT|M_RB|M_RC, F_FRT_FRB, FL_RC }, { "fsel", D_OP(63)|D_XO(23), M_RT|M_RA|M_RB|M_REGC|M_RC, F_FRT_FRA_FRC_FRB, FL_RC }, { "fsqrt", D_OP(63)|D_XO(22), M_RT|M_RB|M_RC, F_FRT_FRB, FL_RC }, { "fsqrts", D_OP(59)|D_XO(22), M_RT|M_RB|M_RC, F_FRT_FRB, FL_RC }, { "fsub", D_OP(63)|D_XO(20), M_RT|M_RA|M_RB|M_RC, F_FRT_FRA_FRB, FL_RC }, { "fsubs", D_OP(59)|D_XO(20), M_RT|M_RA|M_RB|M_RC, F_FRT_FRA_FRB, FL_RC }, { "icbi", D_OP(31)|D_XO(982), M_RA|M_RB, F_RA_0_RB, 0 }, { "isync", D_OP(19)|D_XO(150), 0, F_NONE, 0 }, { "lbz", D_OP(34), M_RT|M_RA|M_D, F_RT_D_RA_0, 0 }, { "lbzu", D_OP(35), M_RT|M_RA|M_D, F_RT_D_RA, FL_CHECK_RA_RT }, { "lbzux", D_OP(31)|D_XO(119), M_RT|M_RA|M_RB, F_RT_RA_RB, FL_CHECK_RA_RT }, { "lbzx", D_OP(31)|D_XO(87), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "lfd", D_OP(50), M_RT|M_RA|M_D, F_FRT_D_RA_0, 0 }, { "lfdu", D_OP(51), M_RT|M_RA|M_D, F_FRT_D_RA, FL_CHECK_RA }, { "lfdux", D_OP(31)|D_XO(631), M_RT|M_RA|M_RB, F_FRT_RA_RB, FL_CHECK_RA }, { "lfdx", D_OP(31)|D_XO(599), M_RT|M_RA|M_RB, F_FRT_RA_0_RB, 0 }, { "lfs", D_OP(48), M_RT|M_RA|M_D, F_FRT_D_RA_0, 0 }, { "lfsu", D_OP(49), M_RT|M_RA|M_D, F_FRT_D_RA, FL_CHECK_RA }, { "lfsux", D_OP(31)|D_XO(567), M_RT|M_RA|M_RB, F_FRT_RA_RB, FL_CHECK_RA }, { "lfsx", D_OP(31)|D_XO(535), M_RT|M_RA|M_RB, F_FRT_RA_0_RB, 0 }, { "lha", D_OP(42), M_RT|M_RA|M_D, F_RT_D_RA_0, 0 }, { "lhau", D_OP(43), M_RT|M_RA|M_D, F_RT_D_RA, FL_CHECK_RA_RT }, { "lhaux", D_OP(31)|D_XO(375), M_RT|M_RA|M_RB, F_RT_RA_RB, FL_CHECK_RA_RT }, { "lhax", D_OP(31)|D_XO(343), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "lhbrx", D_OP(31)|D_XO(790), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "lhz", D_OP(40), M_RT|M_RA|M_D, F_RT_D_RA_0, 0 }, { "lhzu", D_OP(41), M_RT|M_RA|M_D, F_RT_D_RA, FL_CHECK_RA_RT }, { "lhzux", D_OP(31)|D_XO(311), M_RT|M_RA|M_RB, F_RT_RA_RB, FL_CHECK_RA_RT }, { "lhzx", D_OP(31)|D_XO(279), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "lmw", D_OP(46), M_RT|M_RA|M_D, F_RT_D_RA_0, 0 }, { "lswi", D_OP(31)|D_XO(597), M_RT|M_RA|M_NB, F_RT_RA_0_NB, FL_CHECK_LSWI }, { "lswx", D_OP(31)|D_XO(533), M_RT|M_RA|M_RB, F_RT_RA_0_RB, FL_CHECK_LSWX }, { "lwarx", D_OP(31)|D_XO(20), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "lwbrx", D_OP(31)|D_XO(534), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "lwz", D_OP(32), M_RT|M_RA|M_D, F_RT_D_RA_0, 0 }, { "lwzu", D_OP(33), M_RT|M_RA|M_D, F_RT_D_RA, FL_CHECK_RA_RT }, { "lwzux", D_OP(31)|D_XO(55), M_RT|M_RA|M_RB, F_RT_RA_RB, FL_CHECK_RA_RT }, { "lwzx", D_OP(31)|D_XO(23), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "mcrf", D_OP(19)|D_XO(0), M_CRFD|M_CRFS, F_CRFD_CRFS, 0 }, { "mcrfs", D_OP(63)|D_XO(64), M_CRFD|M_CRFS, F_CRFD_CRFS, 0 }, { "mcrxr", D_OP(31)|D_XO(512), M_CRFD, F_MCRXR, 0 }, { "mfcr", D_OP(31)|D_XO(19), M_RT, F_RT, 0 }, { "mffs", D_OP(63)|D_XO(583), M_RT|M_RC, F_MFFSx, FL_RC }, { "mfmsr", D_OP(31)|D_XO(83), M_RT, F_RT, 0 }, { "mfspr", D_OP(31)|D_XO(339), M_RT|M_SPR, F_RT_SPR, 0 }, { "mfsr", D_OP(31)|D_XO(595), M_RT|M_SR, F_MFSR, 0 }, { "mfsrin", D_OP(31)|D_XO(659), M_RT|M_RB, F_RT_RB, 0 }, { "mftb", D_OP(31)|D_XO(371), M_RT|M_TBR, F_RT_SPR, 0 }, { "mtcrf", D_OP(31)|D_XO(144), M_RT|M_CRM, F_MTCRF, 0 }, { "mtfsb0", D_OP(63)|D_XO(70), M_CRBD|M_RC, F_FCRBD, FL_RC }, { "mtfsb1", D_OP(63)|D_XO(38), M_CRBD|M_RC, F_FCRBD, FL_RC }, { "mtfsf", D_OP(63)|D_XO(711), M_FM|M_RB|M_RC, F_MTFSFx, FL_RC }, { "mtfsfi", D_OP(63)|D_XO(134), M_CRFD|M_IMM|M_RC, F_MTFSFIx, FL_RC }, { "mtmsr", D_OP(31)|D_XO(146), M_RT, F_RT, 0 }, { "mtspr", D_OP(31)|D_XO(467), M_RT|M_SPR, F_MTSPR, 0 }, { "mtsr", D_OP(31)|D_XO(210), M_RT|M_SR, F_MTSR, 0 }, { "mtsrin", D_OP(31)|D_XO(242), M_RT|M_RB, F_RT_RB, 0 }, { "mulhw", D_OP(31)|D_XO(75), M_RT|M_RA|M_RB|M_RC, F_RT_RA_RB, FL_RC }, { "mulhwu", D_OP(31)|D_XO(11), M_RT|M_RA|M_RB|M_RC, F_RT_RA_RB, FL_RC }, { "mulli", D_OP(7), M_RT|M_RA|M_SIMM, F_RT_RA_SIMM, 0 }, { "mullw", D_OP(31)|D_XO(235), M_RT|M_RA|M_RB|M_OE|M_RC, F_RT_RA_RB, FL_OE|FL_RC }, { "nand", D_OP(31)|D_XO(476), M_RA|M_RT|M_RB|M_RC, F_RA_RT_RB, FL_RC }, { "neg", D_OP(31)|D_XO(104), M_RT|M_RA|M_OE|M_RC, F_RT_RA, FL_OE|FL_RC }, { "nor", D_OP(31)|D_XO(124), M_RT|M_RA|M_RB|M_RC, F_RA_RT_RB, FL_RC }, { "or", D_OP(31)|D_XO(444), M_RT|M_RA|M_RB|M_RC, F_RA_RT_RB, FL_RC }, { "orc", D_OP(31)|D_XO(412), M_RT|M_RA|M_RB|M_RC, F_RA_RT_RB, FL_RC }, { "ori", D_OP(24), M_RT|M_RA|M_UIMM, F_RA_RT_UIMM, 0 }, { "oris", D_OP(25), M_RT|M_RA|M_UIMM, F_RA_RT_UIMM, 0 }, { "rfi", D_OP(19)|D_XO(50), 0, F_NONE, 0 }, { "rlwimi", D_OP(20), M_RT|M_RA|M_SH|M_MB|M_ME|M_RC, F_RA_RT_SH_MB_ME, FL_RC }, { "rlwinm", D_OP(21), M_RT|M_RA|M_SH|M_MB|M_ME|M_RC, F_RA_RT_SH_MB_ME, FL_RC }, { "rlwnm", D_OP(23), M_RT|M_RA|M_RB|M_MB|M_ME|M_RC, F_RLWNMx, FL_RC }, { "sc", D_OP(17)|2, 0, F_NONE, 0 }, { "slw", D_OP(31)|D_XO(24), M_RT|M_RA|M_RB|M_RC, F_RA_RT_RB, FL_RC }, { "sraw", D_OP(31)|D_XO(792), M_RT|M_RA|M_RB|M_RC, F_RA_RT_RB, FL_RC }, { "srawi", D_OP(31)|D_XO(824), M_RT|M_RA|M_SH|M_RC, F_SRAWIx, FL_RC }, { "srw", D_OP(31)|D_XO(536), M_RT|M_RA|M_RB|M_RC, F_RA_RT_RB, FL_RC }, { "stb", D_OP(38), M_RT|M_RA|M_D, F_RT_D_RA_0, 0 }, { "stbu", D_OP(39), M_RT|M_RA|M_D, F_RT_D_RA, FL_CHECK_RA }, { "stbux", D_OP(31)|D_XO(247), M_RT|M_RA|M_RB, F_RT_RA_RB, FL_CHECK_RA }, { "stbx", D_OP(31)|D_XO(215), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "stfd", D_OP(54), M_RT|M_RA|M_D, F_FRT_D_RA_0, 0 }, { "stfdu", D_OP(55), M_RT|M_RA|M_D, F_FRT_D_RA, FL_CHECK_RA }, { "stfdux", D_OP(31)|D_XO(759), M_RT|M_RA|M_RB, F_FRT_RA_RB, FL_CHECK_RA }, { "stfdx", D_OP(31)|D_XO(727), M_RT|M_RA|M_RB, F_FRT_RA_0_RB, 0 }, { "stfiwx", D_OP(31)|D_XO(983), M_RT|M_RA|M_RB, F_FRT_RA_0_RB, 0 }, { "stfs", D_OP(52), M_RT|M_RA|M_D, F_FRT_D_RA_0, 0 }, { "stfsu", D_OP(53), M_RT|M_RA|M_D, F_FRT_D_RA, FL_CHECK_RA }, { "stfsux", D_OP(31)|D_XO(695), M_RT|M_RA|M_RB, F_FRT_RA_RB, FL_CHECK_RA }, { "stfsx", D_OP(31)|D_XO(663), M_RT|M_RA|M_RB, F_FRT_RA_0_RB, 0 }, { "sth", D_OP(44), M_RT|M_RA|M_D, F_RT_D_RA_0, 0 }, { "sthbrx", D_OP(31)|D_XO(918), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "sthu", D_OP(45), M_RT|M_RA|M_D, F_RT_D_RA, FL_CHECK_RA }, { "sthux", D_OP(31)|D_XO(439), M_RT|M_RA|M_RB, F_RT_RA_RB, FL_CHECK_RA }, { "sthx", D_OP(31)|D_XO(407), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "stmw", D_OP(47), M_RT|M_RA|M_D, F_RT_D_RA_0, 0 }, { "stswi", D_OP(31)|D_XO(725), M_RT|M_RA|M_NB, F_RT_RA_0_NB, 0 }, { "stswx", D_OP(31)|D_XO(661), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "stw", D_OP(36), M_RT|M_RA|M_D, F_RT_D_RA_0, 0 }, { "stwbrx", D_OP(31)|D_XO(662), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "stwcx.", D_OP(31)|D_XO(150)|1, M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "stwu", D_OP(37), M_RT|M_RA|M_D, F_RT_D_RA, FL_CHECK_RA }, { "stwux", D_OP(31)|D_XO(183), M_RT|M_RA|M_RB, F_RT_RA_RB, FL_CHECK_RA }, { "stwx", D_OP(31)|D_XO(151), M_RT|M_RA|M_RB, F_RT_RA_0_RB, 0 }, { "subf", D_OP(31)|D_XO(40), M_RT|M_RA|M_RB|M_OE|M_RC, F_RT_RA_RB, FL_OE|FL_RC }, { "subfc", D_OP(31)|D_XO(8), M_RT|M_RA|M_RB|M_OE|M_RC, F_RT_RA_RB, FL_OE|FL_RC }, { "subfe", D_OP(31)|D_XO(136), M_RT|M_RA|M_RB|M_OE|M_RC, F_RT_RA_RB, FL_OE|FL_RC }, { "subfic", D_OP(8), M_RT|M_RA|M_SIMM, F_RT_RA_SIMM, 0 }, { "subfme", D_OP(31)|D_XO(232), M_RT|M_RA|M_OE|M_RC, F_RT_RA, FL_OE|FL_RC }, { "subfze", D_OP(31)|D_XO(200), M_RT|M_RA|M_OE|M_RC, F_RT_RA, FL_OE|FL_RC }, { "sync", D_OP(31)|D_XO(598), 0, F_NONE, 0 }, { "tlbia", D_OP(31)|D_XO(370), 0, F_NONE, 0 }, { "tlbie", D_OP(31)|D_XO(306), M_RB, F_RB, 0 }, { "tlbsync",D_OP(31)|D_XO(566), 0, F_NONE, 0 }, { "tw", D_OP(31)|D_XO(4), M_TO|M_RA|M_RB, F_TW, 0 }, { "twi", D_OP(3), M_TO|M_RA|M_SIMM, F_TWI, 0 }, { "xor", D_OP(31)|D_XO(316), M_RT|M_RA|M_RB|M_RC, F_RA_RT_RB, FL_RC }, { "xori", D_OP(26), M_RT|M_RA|M_UIMM, F_RA_RT_UIMM, 0 }, { "xoris", D_OP(27), M_RT|M_RA|M_UIMM, F_RA_RT_UIMM, 0 }, /* * PowerPC 603e/EC603e-specific instructions */ { "tlbld", D_OP(31)|D_XO(978), M_RB, F_RB, 0 }, { "tlbli", D_OP(31)|D_XO(1010),M_RB, F_RB, 0 } }; /* * CR Bits * * Use an index of BI&3 into this table to obtain the CR field bit name. */ static CHAR *crbit[] = { "lt", "gt", "eq", "so" }; /* * SPR(): * * Decode the SPR (or TBR) field and append the register name to dest. If * no name is associated with the field value, the value itself is printed. */ static void SPR(CHAR *dest, UINT spr_field) { UINT spr; /* * Construct the SPR number -- SPR field is 2 5-bit fields */ spr = (spr_field >> 5) & 0x1f; spr |= (spr_field & 0x1f) << 5; /* * Append the SPR name to the destination string using strcat() */ switch (spr) { case 1: strcat(dest, "xer"); break; case 8: strcat(dest, "lr"); break; case 9: strcat(dest, "ctr"); break; case 18: strcat(dest, "dsisr"); break; case 19: strcat(dest, "dar"); break; case 22: strcat(dest, "dec"); break; case 25: strcat(dest, "sdr1"); break; case 26: strcat(dest, "srr0"); break; case 27: strcat(dest, "srr1"); break; case 272: strcat(dest, "sprg0"); break; case 273: strcat(dest, "sprg1"); break; case 274: strcat(dest, "sprg2"); break; case 275: strcat(dest, "sprg3"); break; case 282: strcat(dest, "ear"); break; case 287: strcat(dest, "pvr"); break; case 528: strcat(dest, "ibat0u"); break; case 529: strcat(dest, "ibat0l"); break; case 530: strcat(dest, "ibat1u"); break; case 531: strcat(dest, "ibat1l"); break; case 532: strcat(dest, "ibat2u"); break; case 533: strcat(dest, "ibat2l"); break; case 534: strcat(dest, "ibat3u"); break; case 535: strcat(dest, "ibat3l"); break; case 536: strcat(dest, "dbat0u"); break; case 537: strcat(dest, "dbat0l"); break; case 538: strcat(dest, "dbat1u"); break; case 539: strcat(dest, "dbat1l"); break; case 540: strcat(dest, "dbat2u"); break; case 541: strcat(dest, "dbat2l"); break; case 542: strcat(dest, "dbat3u"); break; case 543: strcat(dest, "dbat3l"); break; case 1013: strcat(dest, "dabr"); break; // unsupported on 603e/EC603e /* * Some PowerPC implementations may implement MFTB and MFSPR identically, * therefore TBR registers are also decoded here */ case 268: strcat(dest, "tbl"); break; case 269: strcat(dest, "tbu"); break; /* * PowerPC 603e/EC603e-specific registers */ case 1008: strcat(dest, "hid0"); break; case 1009: strcat(dest, "hid1"); break; case 976: strcat(dest, "dmiss"); break; case 977: strcat(dest, "dcmp"); break; case 978: strcat(dest, "hash2"); break; case 979: strcat(dest, "hash2"); break; case 980: strcat(dest, "imiss"); break; case 981: strcat(dest, "icmp"); break; case 982: strcat(dest, "rpa"); break; case 1010: strcat(dest, "iabr"); break; default: sprintf(dest, "%s%d", dest, spr); break; } } /* * DecodeSigned16(): * * Predecodes the SIMM field for us. If do_unsigned, it is printed as an * unsigned 16-bit integer. */ static void DecodeSigned16(CHAR *outbuf, UINT32 op, BOOL do_unsigned) { INT16 s; s = G_SIMM(op); if (do_unsigned) // sign extend to unsigned 32-bits sprintf(outbuf, "0x%04X", (UINT32) s); else // print as signed 16 bits { if (s < 0) { s *= -1; sprintf(outbuf, "-0x%04X", s); } else sprintf(outbuf, "0x%04X",s); } } /* * Mask(): * * Generate a mask from bit MB through ME (PPC-style backwards bit numbering.) */ static UINT32 Mask(UINT mb, UINT me) { UINT32 i, mask; mb &= 31; me &= 31; i = mb; mask = 0; while (1) { mask |= (1 << (31 - i)); if (i == me) break; i = (i + 1) & 31; } return mask; } /* * Check(): * * Perform checks on the instruction as required by the flags. Returns 1 if * the instruction failed. */ static BOOL Check(UINT32 op, FLAGS flags) { UINT nb, rt, ra; if (!flags) return 0; // nothing to check for! rt = G_RT(op); ra = G_RA(op); if (flags & FL_CHECK_RA_RT) // invalid if rA==0 or rA==rT { if ((G_RA(op) == 0) || (G_RA(op) == G_RT(op))) return 1; } if (flags & FL_CHECK_RA) // invalid if rA==0 { if (G_RA(op) == 0) return 1; } if (flags & FL_CHECK_LSWI) { /* * Check that rA is not in the range of registers to be loaded (even * if rA == 0) */ nb = G_NB(op); if (ra >= rt && ra <= (rt + nb - 1)) return 1; if ((rt + nb - 1) > 31) // register wrap-around! { if (ra < ((rt + nb - 1) - 31)) return 1; } } if (flags & FL_CHECK_LSWX) { /* * Check that rT != rA, rT != rB, and rD and rA both do not specify * R0. * * We cannot check fully whether rA or rB are in the range of * registers specified to be loaded because that depends on XER. */ if (rt == ra || rt == G_RB(op) || ((rt == 0) && (ra == 0))) return 1; } return 0; // passed checks } /* * Simplified(): * * Handles all simplified instruction forms. Returns 1 if one was decoded, * otherwise 0 to indicate disassembly should carry on as normal. */ static BOOL Simplified(UINT32 op, UINT32 vpc, CHAR *signed16, CHAR *mnem, CHAR *oprs) { UINT32 value, disp; value = G_SIMM(op); // value is fully sign-extended SIMM field if (value & 0x8000) value |= 0xffff0000; if (op == (D_OP(24)|D_RT(0)|D_RA(0)|D_UIMM(0))) strcat(mnem, "nop"); // ori r0,r0,0 -> nop else if ((op & ~(M_RT|M_RA|M_RB|M_RC)) == (D_OP(31)|D_XO(444))) { if (G_RT(op) == G_RB(op)) { strcat(mnem, "mr"); // orx rA,rT,rT -> mrx rA,rT if (op & M_RC) strcat(mnem, "."); sprintf(oprs, "r%d,r%d", G_RA(op), G_RT(op)); } else return 0; } else if ((op & ~(M_RT|M_RA|M_RB|M_RC)) == (D_OP(31)|D_XO(124))) { if (G_RT(op) == G_RB(op)) { strcat(mnem, "not"); // nor rA,rT,rT -> not rA,rT if (op & M_RC) strcat(mnem, "."); sprintf(oprs, "r%d,r%d", G_RA(op), G_RT(op)); } else return 0; } else if ((op & ~(M_RT|M_RA|M_SIMM)) == D_OP(14)) { if (G_RA(op) == 0) { strcat(mnem, "li"); // addi rT,0,value -> li rT,value sprintf(oprs, "r%d,0x%08X", G_RT(op), value); } else return 0; } else if ((op & ~(M_RT|M_RA|M_SIMM)) == D_OP(15)) { if (G_RA(op) == 0) { strcat(mnem, "li"); // addis rT,0,value -> li rT,(value<<16) sprintf(oprs, "r%d,0x%08X", G_RT(op), value << 16); } else { strcat(mnem, "addi"); // addis rT,rA,SIMM -> addi rT,rA,SIMM<<16 sprintf(oprs, "r%d,r%d,0x%08X", G_RT(op), G_RA(op), value << 16); } } else if ((op & ~(M_RT|M_RA|M_UIMM)) == D_OP(29)) { strcat(mnem, "andi."); // andis. rA,rT,UIMM -> andi. rA,rT,UIMM<<16 sprintf(oprs, "r%d,r%d,0x%08X", G_RA(op), G_RT(op), G_UIMM(op) << 16); } else if ((op & ~(M_RT|M_RA|M_UIMM)) == D_OP(25)) { strcat(mnem, "ori"); // oris rA,rT,UIMM -> ori rA,rT,UIMM<<16 sprintf(oprs, "r%d,r%d,0x%08X", G_RA(op), G_RT(op), G_UIMM(op) << 16); } else if ((op & ~(M_RT|M_RA|M_UIMM)) == D_OP(27)) { strcat(mnem, "xori"); // xoris rA,rT,UIMM -> xori rA,rT,UIMM<<16 sprintf(oprs, "r%d,r%d,0x%08X", G_RA(op), G_RT(op), G_UIMM(op) << 16); } else if ((op & ~(M_RT|M_RA|M_SH|M_MB|M_ME|M_RC)) == D_OP(20)) { value = Mask(G_MB(op), G_ME(op)); strcat(mnem, "rlwimi"); // rlwimi[.] rA,rT,SH,MB,ME -> rlwimi[.] rA,rT,SH,MASK if (op & M_RC) strcat(mnem, "."); sprintf(oprs, "r%d,r%d,%d,0x%08X", G_RA(op), G_RT(op), G_SH(op), value); } else if ((op & ~(M_RT|M_RA|M_SH|M_MB|M_ME|M_RC)) == D_OP(21)) { value = Mask(G_MB(op), G_ME(op)); if (G_SH(op) == 0) // rlwinm[.] rA,rT,0,MB,ME -> and[.] rA,rT,MASK { strcat(mnem, "and"); if (op & M_RC) strcat(mnem, "."); sprintf(oprs, "r%d,r%d,0x%08X", G_RA(op), G_RT(op), value); } else // rlwinm[.] rA,rT,SH,MASK { strcat(mnem, "rlwinm"); if (op & M_RC) strcat(mnem, "."); sprintf(oprs, "r%d,r%d,%d,0x%08X", G_RA(op), G_RT(op), G_SH(op), value); } } else if ((op & ~(M_RT|M_RA|M_RB|M_MB|M_ME|M_RC)) == D_OP(23)) { value = Mask(G_MB(op), G_ME(op)); strcat(mnem, "rlwnm"); // rlwnm[.] rA,rT,SH,MB,ME -> rlwnm[.] rA,rT,SH,MASK if (op & M_RC) strcat(mnem, "."); sprintf(oprs, "r%d,r%d,r%d,0x%08X", G_RA(op), G_RT(op), G_RB(op), value); } else if ((op & ~(M_BO|M_BI|M_BD|M_AA|M_LK)) == D_OP(16)) { disp = G_BD(op) * 4; if (disp & 0x00008000) disp |= 0xffff0000; switch (G_BO(op)) { case 0x04: // branch if condition is false case 0x05: case 0x06: case 0x07: strcat(mnem, "bf"); break; case 0x0c: case 0x0d: case 0x0e: case 0x0f: strcat(mnem, "bt"); break; default: return 0; } if (op & M_LK) strcat(mnem, "l"); if (op & M_AA) strcat(mnem, "a"); sprintf(oprs, "cr%d[%s],0x%08X", G_BI(op) / 4, crbit[G_BI(op) & 3], disp + ((op & M_AA) ? 0 : vpc)); } else if ((op & ~(M_RT|M_RA|M_RB|M_OE|M_RC)) == (D_OP(31)|D_XO(40))) { strcat(mnem, "sub"); if (op & M_OE) strcat(mnem, "o"); if (op & M_RC) strcat(mnem, "."); sprintf(oprs, "r%d,r%d,r%d", G_RT(op), G_RB(op), G_RA(op)); } else if ((op & ~(M_RT|M_RA|M_RB|M_OE|M_RC)) == (D_OP(31)|D_XO(8))) { strcat(mnem, "subc"); if (op & M_OE) strcat(mnem, "o"); if (op & M_RC) strcat(mnem, "."); sprintf(oprs, "r%d,r%d,r%d", G_RT(op), G_RB(op), G_RA(op)); } else return 0; // no match return 1; } /* * BOOL DisassemblePowerPC(UINT32 op, UINT32 vpc, CHAR *mnem, CHAR *oprs, * BOOL use_simple); * * Disassembles one PowerPC 603e instruction. * * A non-zero return code indicates that the instruction could not be * recognized or that the operands to an instruction were invalid. To * determine which case occured, check if mnem[0] == '\0'. If it does not, * then the latter case happened. * * Arguments: * op = Instruction word to disassemble. * vpc = Current instruction address. * mnem = Buffer to write instruction mnemonic to. If no * instruction was decoded, mnem[0] and oprs[0] will be set * to '\0'. * oprs = Buffer to write any operands to. * use_simple = If non-zero, simplified forms of instructions will be * printed in certain cases. * * Returns: * Zero if successful, non-zero if the instruction was unrecognized or * had an invalid form (see note above in function description.) */ BOOL DisassemblePowerPC(UINT32 op, UINT32 vpc, CHAR *mnem, CHAR *oprs, BOOL use_simple) { CHAR signed16[12]; UINT32 disp; INT i; mnem[0] = '\0'; // so we can use strcat() oprs[0] = '\0'; /* * Decode signed 16-bit fields (SIMM and d) to spare us the work later */ DecodeSigned16(signed16, op, 0); /* * Try simplified forms first, then real instructions */ if (use_simple) { if (Simplified(op, vpc, signed16, mnem, oprs)) return 0; } /* * Search for the instruction in the list and print it if there's a match */ for (i = 0; i < sizeof(itab) / sizeof(IDESCR); i++) { if ((op & ~itab[i].mask) == itab[i].match) // check for match { /* * Base mnemonic followed be O, ., L, A */ strcat(mnem, itab[i].mnem); if (itab[i].flags & FL_OE) if (op & M_OE) strcat(mnem, "o"); if (itab[i].flags & FL_RC) if (op & M_RC) strcat(mnem, "."); if (itab[i].flags & FL_LK) if (op & M_LK) strcat(mnem, "l"); if (itab[i].flags & FL_AA) if (op & M_AA) strcat(mnem, "a"); /* * Print operands */ switch (itab[i].format) { case F_RT_RA_RB: sprintf(oprs, "r%d,r%d,r%d", G_RT(op), G_RA(op), G_RB(op)); break; case F_RT_RA_0_SIMM: if (G_RA(op)) sprintf(oprs, "r%d,r%d,%s", G_RT(op), G_RA(op), signed16); else sprintf(oprs, "r%d,0,%s", G_RT(op), signed16); break; case F_ADDIS: if (G_RA(op)) sprintf(oprs, "r%d,r%d,0x%04X", G_RT(op), G_RA(op), G_SIMM(op)); else sprintf(oprs, "r%d,0,0x%04X", G_RT(op), G_SIMM(op)); break; case F_RT_RA_SIMM: sprintf(oprs, "r%d,r%d,%s", G_RT(op), G_RA(op), signed16); break; case F_RT_RA: sprintf(oprs, "r%d,r%d", G_RT(op), G_RA(op)); break; case F_RA_RT_RB: sprintf(oprs, "r%d,r%d,r%d", G_RA(op), G_RT(op), G_RB(op)); break; case F_RA_RT_UIMM: sprintf(oprs, "r%d,r%d,0x%04X", G_RA(op), G_RT(op), G_UIMM(op)); break; case F_LI: disp = G_LI(op) * 4; if (disp & 0x02000000) // sign extend disp |= 0xfc000000; sprintf(oprs, "0x%08X", disp + ((op & M_AA) ? 0 : vpc)); break; case F_BCx: disp = G_BD(op) * 4; if (disp & 0x00008000) disp |= 0xffff0000; if (G_BO(op) & 0x10) // BI is ignored (don't print CR bit) sprintf(oprs, "0x%02X,%d,0x%08X", G_BO(op), G_BI(op), disp + ((op & M_AA) ? 0 : vpc)); else // BI gives us the condition bit sprintf(oprs, "0x%02X,cr%d[%s],0x%08X", G_BO(op), G_BI(op) / 4, crbit[G_BI(op) & 3], disp + ((op & M_AA) ? 0 : vpc)); break; case F_BO_BI: if (G_BO(op) & 0x10) // BI is ignored (don't print CR bit) sprintf(oprs, "0x%02X,%d", G_BO(op), G_BI(op)); else sprintf(oprs, "0x%02X,cr%d[%s]", G_BO(op), G_BI(op) / 4, crbit[G_BI(op) & 3]); break; case F_CMP: sprintf(oprs, "cr%d,%d,r%d,r%d", G_CRFD(op), G_L(op), G_RA(op), G_RB(op)); break; case F_CMP_SIMM: sprintf(oprs, "cr%d,%d,r%d,%s", G_CRFD(op), G_L(op), G_RA(op), signed16); break; case F_CMP_UIMM: sprintf(oprs, "cr%d,%d,r%d,0x%04X", G_CRFD(op), G_L(op), G_RA(op), G_UIMM(op)); break; case F_RA_RT: sprintf(oprs, "r%d,r%d", G_RA(op), G_RT(op)); break; case F_CRBD_CRBA_CRBB: sprintf(oprs, "cr%d[%s],cr%d[%s],cr%d[%s]", G_CRBD(op) / 4, crbit[G_CRBD(op) & 3], G_CRBA(op) / 4, crbit[G_CRBA(op) & 3], G_CRBB(op) / 4, crbit[G_CRBB(op) & 3]); break; case F_RA_0_RB: if (G_RA(op)) sprintf(oprs, "r%d,r%d", G_RA(op), G_RB(op)); else sprintf(oprs, "0,r%d", G_RB(op)); break; case F_RT_RA_0_RB: if (G_RA(op)) sprintf(oprs, "r%d,r%d,r%d", G_RT(op), G_RA(op), G_RB(op)); else sprintf(oprs, "r%d,0,r%d", G_RT(op), G_RB(op)); break; case F_FRT_FRB: sprintf(oprs, "f%d,f%d", G_RT(op), G_RB(op)); break; case F_FRT_FRA_FRB: sprintf(oprs, "f%d,f%d,f%d", G_RT(op), G_RA(op), G_RB(op)); break; case F_FCMP: sprintf(oprs, "cr%d,f%d,f%d", G_CRFD(op), G_RA(op), G_RB(op)); break; case F_FRT_FRA_FRC_FRB: sprintf(oprs, "f%d,f%d,f%d,f%d", G_RT(op), G_RA(op), G_REGC(op), G_RB(op)); break; case F_FRT_FRA_FRC: sprintf(oprs, "f%d,f%d,f%d", G_RT(op), G_RA(op), G_REGC(op)); break; case F_RT_D_RA_0: if (G_RA(op)) sprintf(oprs, "r%d,%s(r%d)", G_RT(op), signed16, G_RA(op)); else sprintf(oprs, "r%d,0x%08X", G_RT(op), (UINT32) ((INT16) G_D(op))); break; case F_RT_D_RA: sprintf(oprs, "r%d,%s(r%d)", G_RT(op), signed16, G_RA(op)); break; case F_FRT_D_RA_0: if (G_RA(op)) sprintf(oprs, "f%d,%s(r%d)", G_RT(op), signed16, G_RA(op)); else sprintf(oprs, "f%d,0x%08X", G_RT(op), (UINT32) ((INT16) G_D(op))); break; case F_FRT_D_RA: sprintf(oprs, "f%d,%s(r%d)", G_RT(op), signed16, G_RA(op)); break; case F_FRT_RA_RB: sprintf(oprs, "f%d,r%d,r%d", G_RT(op), G_RA(op), G_RB(op)); break; case F_FRT_RA_0_RB: if (G_RA(op)) sprintf(oprs, "f%d,r%d,r%d", G_RT(op), G_RA(op), G_RB(op)); else sprintf(oprs, "f%d,0,r%d", G_RT(op), G_RB(op)); break; case F_RT_RA_0_NB: if (G_RA(op)) sprintf(oprs, "r%d,r%d,%d", G_RT(op), G_RA(op), G_NB(op) ? G_NB(op) : 32); else sprintf(oprs, "r%d,0,%d", G_RT(op), G_NB(op) ? G_NB(op) : 32); break; case F_CRFD_CRFS: sprintf(oprs, "cr%d,cr%d", G_CRFD(op), G_CRFS(op)); break; case F_MCRXR: sprintf(oprs, "cr%d", G_CRFD(op)); break; case F_RT: sprintf(oprs, "r%d", G_RT(op)); break; case F_MFFSx: sprintf(oprs, "f%d", G_RT(op)); break; case F_FCRBD: sprintf(oprs, "fpscr[%d]", G_CRBD(op)); break; case F_RT_SPR: sprintf(oprs, "r%d,", G_RT(op)); SPR(oprs, G_SPR(op)); break; case F_MFSR: sprintf(oprs, "r%d,sr%d", G_RT(op), G_SR(op)); break; case F_MTCRF: sprintf(oprs, "0x%02X,r%d", G_CRM(op), G_RT(op)); break; case F_MTFSFx: sprintf(oprs, "0x%02X,f%d", G_FM(op), G_RB(op)); break; case F_MTFSFIx: sprintf(oprs, "cr%d,0x%X", G_CRFD(op), G_IMM(op)); break; case F_MTSPR: SPR(oprs, G_SPR(op)); sprintf(oprs, "%s,r%d", oprs, G_RT(op)); break; case F_MTSR: sprintf(oprs, "sr%d,r%d", G_SR(op), G_RT(op)); break; case F_RT_RB: sprintf(oprs, "r%d,r%d", G_RT(op), G_RB(op)); break; case F_RA_RT_SH_MB_ME: sprintf(oprs, "r%d,r%d,%d,%d,%d", G_RA(op), G_RT(op), G_SH(op), G_MB(op), G_ME(op)); break; case F_RLWNMx: sprintf(oprs, "r%d,r%d,r%d,%d,%d", G_RA(op), G_RT(op), G_RB(op), G_MB(op), G_ME(op)); break; case F_SRAWIx: sprintf(oprs, "r%d,r%d,%d", G_RA(op), G_RT(op), G_SH(op)); break; case F_RB: sprintf(oprs, "r%d", G_RB(op)); break; case F_TW: sprintf(oprs, "%d,r%d,r%d", G_TO(op), G_RA(op), G_RB(op)); break; case F_TWI: sprintf(oprs, "%d,r%d,%s", G_TO(op), G_RA(op), signed16); break; case F_NONE: default: break; } return Check(op, itab[i].flags); } } return 1; // no match found } #ifdef STANDALONE static void PrintUsage(void) { puts("ppcd Version "DISASM_VERSION" by Bart Trzynadlowski: PowerPC 603e Disassembler"); puts("Usage: ppcd [options]"); puts("Options: -?,-h Show this help text"); puts(" -s Start offset (hexadecimal)"); puts(" -l Number of instructions"); puts(" -o Set origin (hexadecimal)"); puts(" -big Big endian [Default]"); puts(" -little Little endian"); puts(" -simple Use simplified instruction forms [Default]"); puts(" -nosimple Do not use simplified forms"); exit(0); } /* * int main(int argc, char **argv); * * Can you guess what this function is for? ;) */ int main(int argc, char **argv) { CHAR mnem[16], oprs[48]; FILE *fp; UINT8 *buffer; UINT i, fsize, start = 0, len, org, file = 0; UINT32 op; BOOL len_specified = 0, org_specified = 0, little = 0, simple = 1; CHAR *c; if (argc <= 1) PrintUsage(); for (i = 1; i < argc; i++) { if (!strcmp(argv[i], "-h") || !strcmp(argv[i], "-?")) PrintUsage(); else if (!strcmp(argv[i], "-s")) { ++i; if (i >= argc) fprintf(stderr, "ppcd: warning: no argument to %s\n", "-s"); else start = strtoul(argv[i], &c, 16); } else if (!strcmp(argv[i], "-l")) { ++i; if (i >= argc) fprintf(stderr, "ppcd: warning: no argument to %s\n", "-l"); else { len = atoi(argv[i]); len_specified = 1; } } else if (!strcmp(argv[i], "-o")) { ++i; if (i >= argc) fprintf(stderr, "ppcd: warning: no argument to %s\n", "-o"); else { org = strtoul(argv[i], &c, 16); org_specified = 1; } } else if (!strcmp(argv[i], "-big")) little = 0; else if (!strcmp(argv[i], "-little")) little = 1; else if (!strcmp(argv[i], "-simple")) simple = 1; else if (!strcmp(argv[i], "-nosimple")) simple = 0; else file = i; } if (!file) { fprintf(stderr, "ppcd: no input file specified\n"); exit(1); } /* * Load file */ if ((fp = fopen(argv[file], "rb")) == NULL) { fprintf(stderr, "ppcd: failed to open file: %s\n", argv[file]); exit(1); } fseek(fp, 0, SEEK_END); fsize = ftell(fp); rewind(fp); if ((buffer = (UINT8 *) calloc(fsize, sizeof(UINT8))) == NULL) { fprintf(stderr, "ppcd: not enough memory to load input file: %s, %lu bytes\n", argv[file], (unsigned long) fsize); fclose(fp); exit(1); } fread(buffer, sizeof(UINT8), fsize, fp); fclose(fp); if (!len_specified) len = fsize - start; else len *= 4; // each instruction == 4 bytes if (!org_specified) org = start; /* * Disassemble! */ for (i = start; i < fsize && i < (start + len); i += 4, org += 4) { if (!little) op = (buffer[i] << 24) | (buffer[i + 1] << 16) | (buffer[i + 2] << 8) | buffer[i + 3]; else op = (buffer[i + 3] << 24) | (buffer[i + 2] << 16) | (buffer[i + 1] << 8) | buffer[i + 0]; if (DisassemblePowerPC(op, org, mnem, oprs, simple)) { if (mnem[0] != '\0') // invalid form printf("0x%08X: 0x%08X\t%s*\t%s\n", org, op, mnem, oprs); else printf("0x%08X: 0x%08X\t?\n", org, op); } else printf("0x%08X: 0x%08X\t%s\t%s\n", org, op, mnem, oprs); } free(buffer); return 0; } #endif