diff options
| -rw-r--r-- | sys/arch/amd64/amd64/db_disasm.c | 1326 |
1 files changed, 1319 insertions, 7 deletions
diff --git a/sys/arch/amd64/amd64/db_disasm.c b/sys/arch/amd64/amd64/db_disasm.c index 431afcc2551..8586032b868 100644 --- a/sys/arch/amd64/amd64/db_disasm.c +++ b/sys/arch/amd64/amd64/db_disasm.c @@ -1,5 +1,5 @@ -/* $OpenBSD: db_disasm.c,v 1.1 2004/01/28 01:39:38 mickey Exp $ */ -/* $NetBSD: db_disasm.c,v 1.1 2003/04/26 18:39:27 fvdl Exp $ */ +/* $OpenBSD: db_disasm.c,v 1.2 2004/02/28 22:22:35 deraadt Exp $ */ +/* $NetBSD: db_disasm.c,v 1.11 1996/05/03 19:41:58 christos Exp $ */ /* * Mach Operating System @@ -23,16 +23,15 @@ * Carnegie Mellon University * Pittsburgh PA 15213-3890 * - * any improvements or extensions that they make and grant Carnegie the - * rights to redistribute these changes. + * any improvements or extensions that they make and grant Carnegie Mellon + * the rights to redistribute these changes. * - * Id: db_disasm.c,v 2.3 91/02/05 17:11:03 mrt (CMU) + * Id: db_disasm.c,v 2.6 92/01/03 20:05:00 dbg (CMU) */ /* * Instruction disassembler. */ - #include <sys/param.h> #include <sys/proc.h> #include <machine/db_machdep.h> @@ -43,6 +42,1036 @@ #include <ddb/db_interface.h> /* + * Size attributes + */ +#define BYTE 0 +#define WORD 1 +#define LONG 2 +#define QUAD 3 +#define SNGL 4 +#define DBLR 5 +#define EXTR 6 +#define SDEP 7 +#define NONE 8 + +/* + * Addressing modes + */ +#define E 1 /* general effective address */ +#define Eind 2 /* indirect address (jump, call) */ +#define Ew 3 /* address, word size */ +#define Eb 4 /* address, byte size */ +#define R 5 /* register, in 'reg' field */ +#define Rw 6 /* word register, in 'reg' field */ +#define Ri 7 /* register in instruction */ +#define S 8 /* segment reg, in 'reg' field */ +#define Si 9 /* segment reg, in instruction */ +#define A 10 /* accumulator */ +#define BX 11 /* (bx) */ +#define CL 12 /* cl, for shifts */ +#define DX 13 /* dx, for IO */ +#define SI 14 /* si */ +#define DI 15 /* di */ +#define CR 16 /* control register */ +#define DR 17 /* debug register */ +#define TR 18 /* test register */ +#define I 19 /* immediate, unsigned */ +#define Is 20 /* immediate, signed */ +#define Ib 21 /* byte immediate, unsigned */ +#define Ibs 22 /* byte immediate, signed */ +#define Iw 23 /* word immediate, unsigned */ +#define O 25 /* direct address */ +#define Db 26 /* byte displacement from EIP */ +#define Dl 27 /* long displacement from EIP */ +#define o1 28 /* constant 1 */ +#define o3 29 /* constant 3 */ +#define OS 30 /* immediate offset/segment */ +#define ST 31 /* FP stack top */ +#define STI 32 /* FP stack */ +#define X 33 /* extended FP op */ +#define XA 34 /* for 'fstcw %ax' */ +#define El 35 /* address, long size */ +#define Ril 36 /* long register in instruction */ +#define Iba 37 /* byte immediate, don't print if 0xa */ + +struct inst { + char * i_name; /* name */ + short i_has_modrm; /* has regmodrm byte */ + short i_size; /* operand size */ + int i_mode; /* addressing modes */ + void * i_extra; /* pointer to extra opcode table */ +}; + +#define op1(x) (x) +#define op2(x,y) ((x)|((y)<<8)) +#define op3(x,y,z) ((x)|((y)<<8)|((z)<<16)) + +struct finst { + char * f_name; /* name for memory instruction */ + int f_size; /* size for memory instruction */ + int f_rrmode; /* mode for rr instruction */ + void * f_rrname; /* name for rr instruction + (or pointer to table) */ +}; + +char * db_Grp6[] = { + "sldt", "str", "lldt", "ltr", + "verr", "verw", "", "" +}; + +char * db_Grp7[] = { + "sgdt", "sidt", "lgdt", "lidt", + "smsw", "", "lmsw", "invlpg" +}; + +char * db_Grp8[] = { + "", "", "", "", + "bt", "bts", "btr", "btc" +}; + +char * db_Grp9[] = { + "fxsave", "fxrstor", "", "", + "", "", "", "" +}; + +char * db_GrpA[] = { + "", "cmpxchg8b", "", "", + "", "", "", "" +}; + +char * db_GrpB[] = { + "xstore-rng", "xcrypt-ecb", "xcrypt-cbc", "", + "xcrypt-cfb", "xcrypt-ofb", "", "" +}; + +struct inst db_inst_0f0x[] = { +/*00*/ { "", TRUE, NONE, op1(Ew), db_Grp6 }, +/*01*/ { "", TRUE, NONE, op1(Ew), db_Grp7 }, +/*02*/ { "lar", TRUE, LONG, op2(E,R), 0 }, +/*03*/ { "lsl", TRUE, LONG, op2(E,R), 0 }, +/*04*/ { "", FALSE, NONE, 0, 0 }, +/*05*/ { "", FALSE, NONE, 0, 0 }, +/*06*/ { "clts", FALSE, NONE, 0, 0 }, +/*07*/ { "", FALSE, NONE, 0, 0 }, + +/*08*/ { "invd", FALSE, NONE, 0, 0 }, +/*09*/ { "wbinvd",FALSE, NONE, 0, 0 }, +/*0a*/ { "", FALSE, NONE, 0, 0 }, +/*0b*/ { "", FALSE, NONE, 0, 0 }, +/*0c*/ { "", FALSE, NONE, 0, 0 }, +/*0d*/ { "", FALSE, NONE, 0, 0 }, +/*0e*/ { "", FALSE, NONE, 0, 0 }, +/*0f*/ { "", FALSE, NONE, 0, 0 }, +}; + +struct inst db_inst_0f2x[] = { +/*20*/ { "mov", TRUE, LONG, op2(CR,E), 0 }, /* use E for reg */ +/*21*/ { "mov", TRUE, LONG, op2(DR,E), 0 }, /* since mod == 11 */ +/*22*/ { "mov", TRUE, LONG, op2(E,CR), 0 }, +/*23*/ { "mov", TRUE, LONG, op2(E,DR), 0 }, +/*24*/ { "mov", TRUE, LONG, op2(TR,E), 0 }, +/*25*/ { "", FALSE, NONE, 0, 0 }, +/*26*/ { "mov", TRUE, LONG, op2(E,TR), 0 }, +/*27*/ { "", FALSE, NONE, 0, 0 }, + +/*28*/ { "", FALSE, NONE, 0, 0 }, +/*29*/ { "", FALSE, NONE, 0, 0 }, +/*2a*/ { "", FALSE, NONE, 0, 0 }, +/*2b*/ { "", FALSE, NONE, 0, 0 }, +/*2c*/ { "", FALSE, NONE, 0, 0 }, +/*2d*/ { "", FALSE, NONE, 0, 0 }, +/*2e*/ { "", FALSE, NONE, 0, 0 }, +/*2f*/ { "", FALSE, NONE, 0, 0 }, +}; + +struct inst db_inst_0f3x[] = { +/*30*/ { "wrmsr", FALSE, NONE, 0, 0 }, +/*31*/ { "rdtsc", FALSE, NONE, 0, 0 }, +/*32*/ { "rdmsr", FALSE, NONE, 0, 0 }, +/*33*/ { "rdpmc", FALSE, NONE, 0, 0 }, +/*34*/ { "", FALSE, NONE, 0, 0 }, +/*35*/ { "", FALSE, NONE, 0, 0 }, +/*36*/ { "", FALSE, NONE, 0, 0 }, +/*37*/ { "", FALSE, NONE, 0, 0 }, + +/*38*/ { "", FALSE, NONE, 0, 0 }, +/*39*/ { "", FALSE, NONE, 0, 0 }, +/*3a*/ { "", FALSE, NONE, 0, 0 }, +/*3b*/ { "", FALSE, NONE, 0, 0 }, +/*3c*/ { "", FALSE, NONE, 0, 0 }, +/*3d*/ { "", FALSE, NONE, 0, 0 }, +/*3e*/ { "", FALSE, NONE, 0, 0 }, +/*3f*/ { "", FALSE, NONE, 0, 0 }, +}; + +struct inst db_inst_0f8x[] = { +/*80*/ { "jo", FALSE, NONE, op1(Dl), 0 }, +/*81*/ { "jno", FALSE, NONE, op1(Dl), 0 }, +/*82*/ { "jb", FALSE, NONE, op1(Dl), 0 }, +/*83*/ { "jnb", FALSE, NONE, op1(Dl), 0 }, +/*84*/ { "jz", FALSE, NONE, op1(Dl), 0 }, +/*85*/ { "jnz", FALSE, NONE, op1(Dl), 0 }, +/*86*/ { "jbe", FALSE, NONE, op1(Dl), 0 }, +/*87*/ { "jnbe", FALSE, NONE, op1(Dl), 0 }, + +/*88*/ { "js", FALSE, NONE, op1(Dl), 0 }, +/*89*/ { "jns", FALSE, NONE, op1(Dl), 0 }, +/*8a*/ { "jp", FALSE, NONE, op1(Dl), 0 }, +/*8b*/ { "jnp", FALSE, NONE, op1(Dl), 0 }, +/*8c*/ { "jl", FALSE, NONE, op1(Dl), 0 }, +/*8d*/ { "jnl", FALSE, NONE, op1(Dl), 0 }, +/*8e*/ { "jle", FALSE, NONE, op1(Dl), 0 }, +/*8f*/ { "jnle", FALSE, NONE, op1(Dl), 0 }, +}; + +struct inst db_inst_0f9x[] = { +/*90*/ { "seto", TRUE, NONE, op1(Eb), 0 }, +/*91*/ { "setno", TRUE, NONE, op1(Eb), 0 }, +/*92*/ { "setb", TRUE, NONE, op1(Eb), 0 }, +/*93*/ { "setnb", TRUE, NONE, op1(Eb), 0 }, +/*94*/ { "setz", TRUE, NONE, op1(Eb), 0 }, +/*95*/ { "setnz", TRUE, NONE, op1(Eb), 0 }, +/*96*/ { "setbe", TRUE, NONE, op1(Eb), 0 }, +/*97*/ { "setnbe",TRUE, NONE, op1(Eb), 0 }, + +/*98*/ { "sets", TRUE, NONE, op1(Eb), 0 }, +/*99*/ { "setns", TRUE, NONE, op1(Eb), 0 }, +/*9a*/ { "setp", TRUE, NONE, op1(Eb), 0 }, +/*9b*/ { "setnp", TRUE, NONE, op1(Eb), 0 }, +/*9c*/ { "setl", TRUE, NONE, op1(Eb), 0 }, +/*9d*/ { "setnl", TRUE, NONE, op1(Eb), 0 }, +/*9e*/ { "setle", TRUE, NONE, op1(Eb), 0 }, +/*9f*/ { "setnle",TRUE, NONE, op1(Eb), 0 }, +}; + +struct inst db_inst_0fax[] = { +/*a0*/ { "push", FALSE, NONE, op1(Si), 0 }, +/*a1*/ { "pop", FALSE, NONE, op1(Si), 0 }, +/*a2*/ { "cpuid", FALSE, NONE, 0, 0 }, +/*a3*/ { "bt", TRUE, LONG, op2(R,E), 0 }, +/*a4*/ { "shld", TRUE, LONG, op3(Ib,R,E), 0 }, +/*a5*/ { "shld", TRUE, LONG, op3(CL,R,E), 0 }, +/*a6*/ { "", FALSE, NONE, 0, 0 }, +/*a7*/ { "", TRUE, NONE, 0, db_GrpB }, + +/*a8*/ { "push", FALSE, NONE, op1(Si), 0 }, +/*a9*/ { "pop", FALSE, NONE, op1(Si), 0 }, +/*aa*/ { "", FALSE, NONE, 0, 0 }, +/*ab*/ { "bts", TRUE, LONG, op2(R,E), 0 }, +/*ac*/ { "shrd", TRUE, LONG, op3(Ib,E,R), 0 }, +/*ad*/ { "shrd", TRUE, LONG, op3(CL,E,R), 0 }, +/*ae*/ { "", TRUE, NONE, op1(E), db_Grp9 }, +/*af*/ { "imul", TRUE, LONG, op2(E,R), 0 }, +}; + +struct inst db_inst_0fbx[] = { +/*b0*/ { "cmpxchg",TRUE, BYTE, op2(R, E), 0 }, +/*b1*/ { "cmpxchg",TRUE, LONG, op2(R, E), 0 }, +/*b2*/ { "lss", TRUE, LONG, op2(E, R), 0 }, +/*b3*/ { "btr", TRUE, LONG, op2(R, E), 0 }, +/*b4*/ { "lfs", TRUE, LONG, op2(E, R), 0 }, +/*b5*/ { "lgs", TRUE, LONG, op2(E, R), 0 }, +/*b6*/ { "movzb", TRUE, LONG, op2(Eb, R), 0 }, +/*b7*/ { "movzw", TRUE, LONG, op2(Ew, R), 0 }, + +/*b8*/ { "", FALSE, NONE, 0, 0 }, +/*b9*/ { "", FALSE, NONE, 0, 0 }, +/*ba*/ { "", TRUE, LONG, op2(Ib, E), db_Grp8 }, +/*bb*/ { "btc", TRUE, LONG, op2(R, E), 0 }, +/*bc*/ { "bsf", TRUE, LONG, op2(E, R), 0 }, +/*bd*/ { "bsr", TRUE, LONG, op2(E, R), 0 }, +/*be*/ { "movsb", TRUE, LONG, op2(Eb, R), 0 }, +/*bf*/ { "movsw", TRUE, LONG, op2(Ew, R), 0 }, +}; + +struct inst db_inst_0fcx[] = { +/*c0*/ { "xadd", TRUE, BYTE, op2(R, E), 0 }, +/*c1*/ { "xadd", TRUE, LONG, op2(R, E), 0 }, +/*c2*/ { "", FALSE, NONE, 0, 0 }, +/*c3*/ { "", FALSE, NONE, 0, 0 }, +/*c4*/ { "", FALSE, NONE, 0, 0 }, +/*c5*/ { "", FALSE, NONE, 0, 0 }, +/*c6*/ { "", FALSE, NONE, 0, 0 }, +/*c7*/ { "", TRUE, NONE, op1(E), db_GrpA }, + +/*c8*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, +/*c9*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, +/*ca*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, +/*cb*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, +/*cc*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, +/*cd*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, +/*ce*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, +/*cf*/ { "bswap", FALSE, LONG, op1(Ril), 0 }, +}; + +struct inst *db_inst_0f[] = { + db_inst_0f0x, + NULL, + db_inst_0f2x, + db_inst_0f3x, + NULL, + NULL, + NULL, + NULL, + db_inst_0f8x, + db_inst_0f9x, + db_inst_0fax, + db_inst_0fbx, + db_inst_0fcx, + NULL, + NULL, + NULL +}; + +char * db_Esc92[] = { + "fnop", "", "", "", + "", "", "", "" +}; +char * db_Esc94[] = { + "fchs", "fabs", "", "", + "ftst", "fxam", "", "" +}; +char * db_Esc95[] = { + "fld1", "fldl2t", "fldl2e", "fldpi", + "fldlg2", "fldln2", "fldz", "" +}; +char * db_Esc96[] = { + "f2xm1", "fyl2x", "fptan", "fpatan", + "fxtract", "fprem1", "fdecstp", "fincstp" +}; +char * db_Esc97[] = { + "fprem", "fyl2xp1", "fsqrt", "fsincos", + "frndint", "fscale", "fsin", "fcos" +}; + +char * db_Esca5[] = { + "", "fucompp", "", "", + "", "", "", "" +}; + +char * db_Escb4[] = { + "fneni", "fndisi", "fnclex", "fninit", + "fsetpm", "", "", "" +}; + +char * db_Esce3[] = { + "", "fcompp", "", "", + "", "", "", "" +}; + +char * db_Escf4[] = { + "fnstsw", "", "", "", + "", "", "", "" +}; + +struct finst db_Esc8[] = { +/*0*/ { "fadd", SNGL, op2(STI,ST), 0 }, +/*1*/ { "fmul", SNGL, op2(STI,ST), 0 }, +/*2*/ { "fcom", SNGL, op2(STI,ST), 0 }, +/*3*/ { "fcomp", SNGL, op2(STI,ST), 0 }, +/*4*/ { "fsub", SNGL, op2(STI,ST), 0 }, +/*5*/ { "fsubr", SNGL, op2(STI,ST), 0 }, +/*6*/ { "fdiv", SNGL, op2(STI,ST), 0 }, +/*7*/ { "fdivr", SNGL, op2(STI,ST), 0 }, +}; + +struct finst db_Esc9[] = { +/*0*/ { "fld", SNGL, op1(STI), 0 }, +/*1*/ { "", NONE, op1(STI), "fxch" }, +/*2*/ { "fst", SNGL, op1(X), db_Esc92 }, +/*3*/ { "fstp", SNGL, op1(X), 0 }, +/*4*/ { "fldenv", NONE, op1(X), db_Esc94 }, +/*5*/ { "fldcw", NONE, op1(X), db_Esc95 }, +/*6*/ { "fnstenv",NONE, op1(X), db_Esc96 }, +/*7*/ { "fnstcw", NONE, op1(X), db_Esc97 }, +}; + +struct finst db_Esca[] = { +/*0*/ { "fiadd", LONG, 0, 0 }, +/*1*/ { "fimul", LONG, 0, 0 }, +/*2*/ { "ficom", LONG, 0, 0 }, +/*3*/ { "ficomp", LONG, 0, 0 }, +/*4*/ { "fisub", LONG, op1(X), 0 }, +/*5*/ { "fisubr", LONG, 0, 0 }, +/*6*/ { "fidiv", LONG, 0, 0 }, +/*7*/ { "fidivr", LONG, 0, 0 } +}; + +struct finst db_Escb[] = { +/*0*/ { "fild", LONG, 0, 0 }, +/*1*/ { "", NONE, 0, 0 }, +/*2*/ { "fist", LONG, 0, 0 }, +/*3*/ { "fistp", LONG, 0, 0 }, +/*4*/ { "", WORD, op1(X), db_Escb4 }, +/*5*/ { "fld", EXTR, 0, 0 }, +/*6*/ { "", WORD, 0, 0 }, +/*7*/ { "fstp", EXTR, 0, 0 }, +}; + +struct finst db_Escc[] = { +/*0*/ { "fadd", DBLR, op2(ST,STI), 0 }, +/*1*/ { "fmul", DBLR, op2(ST,STI), 0 }, +/*2*/ { "fcom", DBLR, 0, 0 }, +/*3*/ { "fcomp", DBLR, 0, 0 }, +/*4*/ { "fsub", DBLR, op2(ST,STI), "fsubr" }, +/*5*/ { "fsubr", DBLR, op2(ST,STI), "fsub" }, +/*6*/ { "fdiv", DBLR, op2(ST,STI), "fdivr" }, +/*7*/ { "fdivr", DBLR, op2(ST,STI), "fdiv" }, +}; + +struct finst db_Escd[] = { +/*0*/ { "fld", DBLR, op1(STI), "ffree" }, +/*1*/ { "", NONE, 0, 0 }, +/*2*/ { "fst", DBLR, op1(STI), 0 }, +/*3*/ { "fstp", DBLR, op1(STI), 0 }, +/*4*/ { "frstor", NONE, op1(STI), "fucom" }, +/*5*/ { "", NONE, op1(STI), "fucomp" }, +/*6*/ { "fnsave", NONE, 0, 0 }, +/*7*/ { "fnstsw", NONE, 0, 0 }, +}; + +struct finst db_Esce[] = { +/*0*/ { "fiadd", WORD, op2(ST,STI), "faddp" }, +/*1*/ { "fimul", WORD, op2(ST,STI), "fmulp" }, +/*2*/ { "ficom", WORD, 0, 0 }, +/*3*/ { "ficomp", WORD, op1(X), db_Esce3 }, +/*4*/ { "fisub", WORD, op2(ST,STI), "fsubrp" }, +/*5*/ { "fisubr", WORD, op2(ST,STI), "fsubp" }, +/*6*/ { "fidiv", WORD, op2(ST,STI), "fdivrp" }, +/*7*/ { "fidivr", WORD, op2(ST,STI), "fdivp" }, +}; + +struct finst db_Escf[] = { +/*0*/ { "fild", WORD, 0, 0 }, +/*1*/ { "", WORD, 0, 0 }, +/*2*/ { "fist", WORD, 0, 0 }, +/*3*/ { "fistp", WORD, 0, 0 }, +/*4*/ { "fbld", NONE, op1(XA), db_Escf4 }, +/*5*/ { "fild", QUAD, 0, 0 }, +/*6*/ { "fbstp", NONE, 0, 0 }, +/*7*/ { "fistp", QUAD, 0, 0 }, +}; + +struct finst *db_Esc_inst[] = { + db_Esc8, db_Esc9, db_Esca, db_Escb, + db_Escc, db_Escd, db_Esce, db_Escf +}; + +char * db_Grp1[] = { + "add", + "or", + "adc", + "sbb", + "and", + "sub", + "xor", + "cmp" +}; + +char * db_Grp2[] = { + "rol", + "ror", + "rcl", + "rcr", + "shl", + "shr", + "shl", + "sar" +}; + +struct inst db_Grp3[] = { + { "test", TRUE, NONE, op2(I,E), 0 }, + { "test", TRUE, NONE, op2(I,E), 0 }, + { "not", TRUE, NONE, op1(E), 0 }, + { "neg", TRUE, NONE, op1(E), 0 }, + { "mul", TRUE, NONE, op2(E,A), 0 }, + { "imul", TRUE, NONE, op2(E,A), 0 }, + { "div", TRUE, NONE, op2(E,A), 0 }, + { "idiv", TRUE, NONE, op2(E,A), 0 }, +}; + +struct inst db_Grp4[] = { + { "inc", TRUE, BYTE, op1(E), 0 }, + { "dec", TRUE, BYTE, op1(E), 0 }, + { "", TRUE, NONE, 0, 0 }, + { "", TRUE, NONE, 0, 0 }, + { "", TRUE, NONE, 0, 0 }, + { "", TRUE, NONE, 0, 0 }, + { "", TRUE, NONE, 0, 0 }, + { "", TRUE, NONE, 0, 0 } +}; + +struct inst db_Grp5[] = { + { "inc", TRUE, LONG, op1(E), 0 }, + { "dec", TRUE, LONG, op1(E), 0 }, + { "call", TRUE, NONE, op1(Eind),0 }, + { "lcall", TRUE, NONE, op1(Eind),0 }, + { "jmp", TRUE, NONE, op1(Eind),0 }, + { "ljmp", TRUE, NONE, op1(Eind),0 }, + { "push", TRUE, LONG, op1(E), 0 }, + { "", TRUE, NONE, 0, 0 } +}; + +struct inst db_inst_table[256] = { +/*00*/ { "add", TRUE, BYTE, op2(R, E), 0 }, +/*01*/ { "add", TRUE, LONG, op2(R, E), 0 }, +/*02*/ { "add", TRUE, BYTE, op2(E, R), 0 }, +/*03*/ { "add", TRUE, LONG, op2(E, R), 0 }, +/*04*/ { "add", FALSE, BYTE, op2(I, A), 0 }, +/*05*/ { "add", FALSE, LONG, op2(Is, A), 0 }, +/*06*/ { "push", FALSE, NONE, op1(Si), 0 }, +/*07*/ { "pop", FALSE, NONE, op1(Si), 0 }, + +/*08*/ { "or", TRUE, BYTE, op2(R, E), 0 }, +/*09*/ { "or", TRUE, LONG, op2(R, E), 0 }, +/*0a*/ { "or", TRUE, BYTE, op2(E, R), 0 }, +/*0b*/ { "or", TRUE, LONG, op2(E, R), 0 }, +/*0c*/ { "or", FALSE, BYTE, op2(I, A), 0 }, +/*0d*/ { "or", FALSE, LONG, op2(I, A), 0 }, +/*0e*/ { "push", FALSE, NONE, op1(Si), 0 }, +/*0f*/ { "", FALSE, NONE, 0, 0 }, + +/*10*/ { "adc", TRUE, BYTE, op2(R, E), 0 }, +/*11*/ { "adc", TRUE, LONG, op2(R, E), 0 }, +/*12*/ { "adc", TRUE, BYTE, op2(E, R), 0 }, +/*13*/ { "adc", TRUE, LONG, op2(E, R), 0 }, +/*14*/ { "adc", FALSE, BYTE, op2(I, A), 0 }, +/*15*/ { "adc", FALSE, LONG, op2(Is, A), 0 }, +/*16*/ { "push", FALSE, NONE, op1(Si), 0 }, +/*17*/ { "pop", FALSE, NONE, op1(Si), 0 }, + +/*18*/ { "sbb", TRUE, BYTE, op2(R, E), 0 }, +/*19*/ { "sbb", TRUE, LONG, op2(R, E), 0 }, +/*1a*/ { "sbb", TRUE, BYTE, op2(E, R), 0 }, +/*1b*/ { "sbb", TRUE, LONG, op2(E, R), 0 }, +/*1c*/ { "sbb", FALSE, BYTE, op2(I, A), 0 }, +/*1d*/ { "sbb", FALSE, LONG, op2(Is, A), 0 }, +/*1e*/ { "push", FALSE, NONE, op1(Si), 0 }, +/*1f*/ { "pop", FALSE, NONE, op1(Si), 0 }, + +/*20*/ { "and", TRUE, BYTE, op2(R, E), 0 }, +/*21*/ { "and", TRUE, LONG, op2(R, E), 0 }, +/*22*/ { "and", TRUE, BYTE, op2(E, R), 0 }, +/*23*/ { "and", TRUE, LONG, op2(E, R), 0 }, +/*24*/ { "and", FALSE, BYTE, op2(I, A), 0 }, +/*25*/ { "and", FALSE, LONG, op2(I, A), 0 }, +/*26*/ { "", FALSE, NONE, 0, 0 }, +/*27*/ { "aaa", FALSE, NONE, 0, 0 }, + +/*28*/ { "sub", TRUE, BYTE, op2(R, E), 0 }, +/*29*/ { "sub", TRUE, LONG, op2(R, E), 0 }, +/*2a*/ { "sub", TRUE, BYTE, op2(E, R), 0 }, +/*2b*/ { "sub", TRUE, LONG, op2(E, R), 0 }, +/*2c*/ { "sub", FALSE, BYTE, op2(I, A), 0 }, +/*2d*/ { "sub", FALSE, LONG, op2(Is, A), 0 }, +/*2e*/ { "", FALSE, NONE, 0, 0 }, +/*2f*/ { "das", FALSE, NONE, 0, 0 }, + +/*30*/ { "xor", TRUE, BYTE, op2(R, E), 0 }, +/*31*/ { "xor", TRUE, LONG, op2(R, E), 0 }, +/*32*/ { "xor", TRUE, BYTE, op2(E, R), 0 }, +/*33*/ { "xor", TRUE, LONG, op2(E, R), 0 }, +/*34*/ { "xor", FALSE, BYTE, op2(I, A), 0 }, +/*35*/ { "xor", FALSE, LONG, op2(I, A), 0 }, +/*36*/ { "", FALSE, NONE, 0, 0 }, +/*37*/ { "daa", FALSE, NONE, 0, 0 }, + +/*38*/ { "cmp", TRUE, BYTE, op2(R, E), 0 }, +/*39*/ { "cmp", TRUE, LONG, op2(R, E), 0 }, +/*3a*/ { "cmp", TRUE, BYTE, op2(E, R), 0 }, +/*3b*/ { "cmp", TRUE, LONG, op2(E, R), 0 }, +/*3c*/ { "cmp", FALSE, BYTE, op2(I, A), 0 }, +/*3d*/ { "cmp", FALSE, LONG, op2(Is, A), 0 }, +/*3e*/ { "", FALSE, NONE, 0, 0 }, +/*3f*/ { "aas", FALSE, NONE, 0, 0 }, + +/*40*/ { "inc", FALSE, LONG, op1(Ri), 0 }, +/*41*/ { "inc", FALSE, LONG, op1(Ri), 0 }, +/*42*/ { "inc", FALSE, LONG, op1(Ri), 0 }, +/*43*/ { "inc", FALSE, LONG, op1(Ri), 0 }, +/*44*/ { "inc", FALSE, LONG, op1(Ri), 0 }, +/*45*/ { "inc", FALSE, LONG, op1(Ri), 0 }, +/*46*/ { "inc", FALSE, LONG, op1(Ri), 0 }, +/*47*/ { "inc", FALSE, LONG, op1(Ri), 0 }, + +/*48*/ { "dec", FALSE, LONG, op1(Ri), 0 }, +/*49*/ { "dec", FALSE, LONG, op1(Ri), 0 }, +/*4a*/ { "dec", FALSE, LONG, op1(Ri), 0 }, +/*4b*/ { "dec", FALSE, LONG, op1(Ri), 0 }, +/*4c*/ { "dec", FALSE, LONG, op1(Ri), 0 }, +/*4d*/ { "dec", FALSE, LONG, op1(Ri), 0 }, +/*4e*/ { "dec", FALSE, LONG, op1(Ri), 0 }, +/*4f*/ { "dec", FALSE, LONG, op1(Ri), 0 }, + +/*50*/ { "push", FALSE, LONG, op1(Ri), 0 }, +/*51*/ { "push", FALSE, LONG, op1(Ri), 0 }, +/*52*/ { "push", FALSE, LONG, op1(Ri), 0 }, +/*53*/ { "push", FALSE, LONG, op1(Ri), 0 }, +/*54*/ { "push", FALSE, LONG, op1(Ri), 0 }, +/*55*/ { "push", FALSE, LONG, op1(Ri), 0 }, +/*56*/ { "push", FALSE, LONG, op1(Ri), 0 }, +/*57*/ { "push", FALSE, LONG, op1(Ri), 0 }, + +/*58*/ { "pop", FALSE, LONG, op1(Ri), 0 }, +/*59*/ { "pop", FALSE, LONG, op1(Ri), 0 }, +/*5a*/ { "pop", FALSE, LONG, op1(Ri), 0 }, +/*5b*/ { "pop", FALSE, LONG, op1(Ri), 0 }, +/*5c*/ { "pop", FALSE, LONG, op1(Ri), 0 }, +/*5d*/ { "pop", FALSE, LONG, op1(Ri), 0 }, +/*5e*/ { "pop", FALSE, LONG, op1(Ri), 0 }, +/*5f*/ { "pop", FALSE, LONG, op1(Ri), 0 }, + +/*60*/ { "pusha", FALSE, LONG, 0, 0 }, +/*61*/ { "popa", FALSE, LONG, 0, 0 }, +/*62*/ { "bound", TRUE, LONG, op2(E, R), 0 }, +/*63*/ { "arpl", TRUE, NONE, op2(Rw,Ew), 0 }, +/*64*/ { "", FALSE, NONE, 0, 0 }, +/*65*/ { "", FALSE, NONE, 0, 0 }, +/*66*/ { "", FALSE, NONE, 0, 0 }, +/*67*/ { "", FALSE, NONE, 0, 0 }, + +/*68*/ { "push", FALSE, LONG, op1(I), 0 }, +/*69*/ { "imul", TRUE, LONG, op3(I,E,R), 0 }, +/*6a*/ { "push", FALSE, LONG, op1(Ibs), 0 }, +/*6b*/ { "imul", TRUE, LONG, op3(Ibs,E,R),0 }, +/*6c*/ { "ins", FALSE, BYTE, op2(DX, DI), 0 }, +/*6d*/ { "ins", FALSE, LONG, op2(DX, DI), 0 }, +/*6e*/ { "outs", FALSE, BYTE, op2(SI, DX), 0 }, +/*6f*/ { "outs", FALSE, LONG, op2(SI, DX), 0 }, + +/*70*/ { "jo", FALSE, NONE, op1(Db), 0 }, +/*71*/ { "jno", FALSE, NONE, op1(Db), 0 }, +/*72*/ { "jb", FALSE, NONE, op1(Db), 0 }, +/*73*/ { "jnb", FALSE, NONE, op1(Db), 0 }, +/*74*/ { "jz", FALSE, NONE, op1(Db), 0 }, +/*75*/ { "jnz", FALSE, NONE, op1(Db), 0 }, +/*76*/ { "jbe", FALSE, NONE, op1(Db), 0 }, +/*77*/ { "jnbe", FALSE, NONE, op1(Db), 0 }, + +/*78*/ { "js", FALSE, NONE, op1(Db), 0 }, +/*79*/ { "jns", FALSE, NONE, op1(Db), 0 }, +/*7a*/ { "jp", FALSE, NONE, op1(Db), 0 }, +/*7b*/ { "jnp", FALSE, NONE, op1(Db), 0 }, +/*7c*/ { "jl", FALSE, NONE, op1(Db), 0 }, +/*7d*/ { "jnl", FALSE, NONE, op1(Db), 0 }, +/*7e*/ { "jle", FALSE, NONE, op1(Db), 0 }, +/*7f*/ { "jnle", FALSE, NONE, op1(Db), 0 }, + +/*80*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 }, +/*81*/ { "", TRUE, LONG, op2(I, E), db_Grp1 }, +/*82*/ { "", TRUE, BYTE, op2(I, E), db_Grp1 }, +/*83*/ { "", TRUE, LONG, op2(Ibs,E), db_Grp1 }, +/*84*/ { "test", TRUE, BYTE, op2(R, E), 0 }, +/*85*/ { "test", TRUE, LONG, op2(R, E), 0 }, +/*86*/ { "xchg", TRUE, BYTE, op2(R, E), 0 }, +/*87*/ { "xchg", TRUE, LONG, op2(R, E), 0 }, + +/*88*/ { "mov", TRUE, BYTE, op2(R, E), 0 }, +/*89*/ { "mov", TRUE, LONG, op2(R, E), 0 }, +/*8a*/ { "mov", TRUE, BYTE, op2(E, R), 0 }, +/*8b*/ { "mov", TRUE, LONG, op2(E, R), 0 }, +/*8c*/ { "mov", TRUE, NONE, op2(S, Ew), 0 }, +/*8d*/ { "lea", TRUE, LONG, op2(E, R), 0 }, +/*8e*/ { "mov", TRUE, NONE, op2(Ew, S), 0 }, +/*8f*/ { "pop", TRUE, LONG, op1(E), 0 }, + +/*90*/ { "nop", FALSE, NONE, 0, 0 }, +/*91*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, +/*92*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, +/*93*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, +/*94*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, +/*95*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, +/*96*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, +/*97*/ { "xchg", FALSE, LONG, op2(A, Ri), 0 }, + +/*98*/ { "cbw", FALSE, SDEP, 0, "cwde" }, /* cbw/cwde */ +/*99*/ { "cwd", FALSE, SDEP, 0, "cdq" }, /* cwd/cdq */ +/*9a*/ { "lcall", FALSE, NONE, op1(OS), 0 }, +/*9b*/ { "wait", FALSE, NONE, 0, 0 }, +/*9c*/ { "pushf", FALSE, LONG, 0, 0 }, +/*9d*/ { "popf", FALSE, LONG, 0, 0 }, +/*9e*/ { "sahf", FALSE, NONE, 0, 0 }, +/*9f*/ { "lahf", FALSE, NONE, 0, 0 }, + +/*a0*/ { "mov", FALSE, BYTE, op2(O, A), 0 }, +/*a1*/ { "mov", FALSE, LONG, op2(O, A), 0 }, +/*a2*/ { "mov", FALSE, BYTE, op2(A, O), 0 }, +/*a3*/ { "mov", FALSE, LONG, op2(A, O), 0 }, +/*a4*/ { "movs", FALSE, BYTE, op2(SI,DI), 0 }, +/*a5*/ { "movs", FALSE, LONG, op2(SI,DI), 0 }, +/*a6*/ { "cmps", FALSE, BYTE, op2(SI,DI), 0 }, +/*a7*/ { "cmps", FALSE, LONG, op2(SI,DI), 0 }, + +/*a8*/ { "test", FALSE, BYTE, op2(I, A), 0 }, +/*a9*/ { "test", FALSE, LONG, op2(I, A), 0 }, +/*aa*/ { "stos", FALSE, BYTE, op1(DI), 0 }, +/*ab*/ { "stos", FALSE, LONG, op1(DI), 0 }, +/*ac*/ { "lods", FALSE, BYTE, op1(SI), 0 }, +/*ad*/ { "lods", FALSE, LONG, op1(SI), 0 }, +/*ae*/ { "scas", FALSE, BYTE, op1(SI), 0 }, +/*af*/ { "scas", FALSE, LONG, op1(SI), 0 }, + +/*b0*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, +/*b1*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, +/*b2*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, +/*b3*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, +/*b4*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, +/*b5*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, +/*b6*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, +/*b7*/ { "mov", FALSE, BYTE, op2(I, Ri), 0 }, + +/*b8*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, +/*b9*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, +/*ba*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, +/*bb*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, +/*bc*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, +/*bd*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, +/*be*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, +/*bf*/ { "mov", FALSE, LONG, op2(I, Ri), 0 }, + +/*c0*/ { "", TRUE, BYTE, op2(Ib, E), db_Grp2 }, +/*c1*/ { "", TRUE, LONG, op2(Ib, E), db_Grp2 }, +/*c2*/ { "ret", FALSE, NONE, op1(Iw), 0 }, +/*c3*/ { "ret", FALSE, NONE, 0, 0 }, +/*c4*/ { "les", TRUE, LONG, op2(E, R), 0 }, +/*c5*/ { "lds", TRUE, LONG, op2(E, R), 0 }, +/*c6*/ { "mov", TRUE, BYTE, op2(I, E), 0 }, +/*c7*/ { "mov", TRUE, LONG, op2(I, E), 0 }, + +/*c8*/ { "enter", FALSE, NONE, op2(Iw, Ib), 0 }, +/*c9*/ { "leave", FALSE, NONE, 0, 0 }, +/*ca*/ { "lret", FALSE, NONE, op1(Iw), 0 }, +/*cb*/ { "lret", FALSE, NONE, 0, 0 }, +/*cc*/ { "int", FALSE, NONE, op1(o3), 0 }, +/*cd*/ { "int", FALSE, NONE, op1(Ib), 0 }, +/*ce*/ { "into", FALSE, NONE, 0, 0 }, +/*cf*/ { "iret", FALSE, NONE, 0, 0 }, + +/*d0*/ { "", TRUE, BYTE, op2(o1, E), db_Grp2 }, +/*d1*/ { "", TRUE, LONG, op2(o1, E), db_Grp2 }, +/*d2*/ { "", TRUE, BYTE, op2(CL, E), db_Grp2 }, +/*d3*/ { "", TRUE, LONG, op2(CL, E), db_Grp2 }, +/*d4*/ { "aam", TRUE, NONE, op1(Iba), 0 }, +/*d5*/ { "aad", TRUE, NONE, op1(Iba), 0 }, +/*d6*/ { ".byte\t0xd6",FALSE, NONE, 0, 0 }, +/*d7*/ { "xlat", FALSE, BYTE, op1(BX), 0 }, + +/*d8*/ { "", TRUE, NONE, 0, db_Esc8 }, +/*d9*/ { "", TRUE, NONE, 0, db_Esc9 }, +/*da*/ { "", TRUE, NONE, 0, db_Esca }, +/*db*/ { "", TRUE, NONE, 0, db_Escb }, +/*dc*/ { "", TRUE, NONE, 0, db_Escc }, +/*dd*/ { "", TRUE, NONE, 0, db_Escd }, +/*de*/ { "", TRUE, NONE, 0, db_Esce }, +/*df*/ { "", TRUE, NONE, 0, db_Escf }, + +/*e0*/ { "loopne",FALSE, NONE, op1(Db), 0 }, +/*e1*/ { "loope", FALSE, NONE, op1(Db), 0 }, +/*e2*/ { "loop", FALSE, NONE, op1(Db), 0 }, +/*e3*/ { "jcxz", FALSE, SDEP, op1(Db), "jecxz" }, +/*e4*/ { "in", FALSE, BYTE, op2(Ib, A), 0 }, +/*e5*/ { "in", FALSE, LONG, op2(Ib, A) , 0 }, +/*e6*/ { "out", FALSE, BYTE, op2(A, Ib), 0 }, +/*e7*/ { "out", FALSE, LONG, op2(A, Ib) , 0 }, + +/*e8*/ { "call", FALSE, NONE, op1(Dl), 0 }, +/*e9*/ { "jmp", FALSE, NONE, op1(Dl), 0 }, +/*ea*/ { "ljmp", FALSE, NONE, op1(OS), 0 }, +/*eb*/ { "jmp", FALSE, NONE, op1(Db), 0 }, +/*ec*/ { "in", FALSE, BYTE, op2(DX, A), 0 }, +/*ed*/ { "in", FALSE, LONG, op2(DX, A) , 0 }, +/*ee*/ { "out", FALSE, BYTE, op2(A, DX), 0 }, +/*ef*/ { "out", FALSE, LONG, op2(A, DX) , 0 }, + +/*f0*/ { "", FALSE, NONE, 0, 0 }, +/*f1*/ { "", FALSE, NONE, 0, 0 }, +/*f2*/ { "", FALSE, NONE, 0, 0 }, +/*f3*/ { "", FALSE, NONE, 0, 0 }, +/*f4*/ { "hlt", FALSE, NONE, 0, 0 }, +/*f5*/ { "cmc", FALSE, NONE, 0, 0 }, +/*f6*/ { "", TRUE, BYTE, 0, db_Grp3 }, +/*f7*/ { "", TRUE, LONG, 0, db_Grp3 }, + +/*f8*/ { "clc", FALSE, NONE, 0, 0 }, +/*f9*/ { "stc", FALSE, NONE, 0, 0 }, +/*fa*/ { "cli", FALSE, NONE, 0, 0 }, +/*fb*/ { "sti", FALSE, NONE, 0, 0 }, +/*fc*/ { "cld", FALSE, NONE, 0, 0 }, +/*fd*/ { "std", FALSE, NONE, 0, 0 }, +/*fe*/ { "", TRUE, NONE, 0, db_Grp4 }, +/*ff*/ { "", TRUE, NONE, 0, db_Grp5 }, +}; + +struct inst db_bad_inst = + { "???", FALSE, NONE, 0, 0 } +; + +#define f_mod(byte) ((byte)>>6) +#define f_reg(byte) (((byte)>>3)&0x7) +#define f_rm(byte) ((byte)&0x7) + +#define sib_ss(byte) ((byte)>>6) +#define sib_index(byte) (((byte)>>3)&0x7) +#define sib_base(byte) ((byte)&0x7) + +struct i_addr { + int is_reg; /* if reg, reg number is in 'disp' */ + int disp; + char * base; + char * index; + int ss; +}; + +char * db_index_reg_16[8] = { + "%bx,%si", + "%bx,%di", + "%bp,%si", + "%bp,%di", + "%si", + "%di", + "%bp", + "%bx" +}; + +char * db_reg[3][8] = { + { "%al", "%cl", "%dl", "%bl", "%ah", "%ch", "%dh", "%bh" }, + { "%ax", "%cx", "%dx", "%bx", "%sp", "%bp", "%si", "%di" }, + { "%eax", "%ecx", "%edx", "%ebx", "%esp", "%ebp", "%esi", "%edi" } +}; + +char * db_seg_reg[8] = { + "%es", "%cs", "%ss", "%ds", "%fs", "%gs", "", "" +}; + +/* + * lengths for size attributes + */ +int db_lengths[] = { + 1, /* BYTE */ + 2, /* WORD */ + 4, /* LONG */ + 8, /* QUAD */ + 4, /* SNGL */ + 8, /* DBLR */ + 10, /* EXTR */ +}; + +#define get_value_inc(result, loc, size, is_signed) \ + do { \ + result = db_get_value((loc), (size), (is_signed)); \ + (loc) += (size); \ + } while (0) + + +db_addr_t db_read_address(db_addr_t, int, int, struct i_addr *); +void db_print_address(char *, int, struct i_addr *); +db_addr_t db_disasm_esc(db_addr_t, int, int, int, char *); + +/* + * Read address at location and return updated location. + */ +db_addr_t +db_read_address(loc, short_addr, regmodrm, addrp) + db_addr_t loc; + int short_addr; + int regmodrm; + struct i_addr *addrp; /* out */ +{ + int mod, rm, sib, index, disp; + + mod = f_mod(regmodrm); + rm = f_rm(regmodrm); + + if (mod == 3) { + addrp->is_reg = TRUE; + addrp->disp = rm; + return (loc); + } + addrp->is_reg = FALSE; + addrp->index = 0; + + if (short_addr) { + addrp->index = 0; + addrp->ss = 0; + switch (mod) { + case 0: + if (rm == 6) { + get_value_inc(disp, loc, 2, FALSE); + addrp->disp = disp; + addrp->base = 0; + } else { + addrp->disp = 0; + addrp->base = db_index_reg_16[rm]; + } + break; + case 1: + get_value_inc(disp, loc, 1, TRUE); + disp &= 0xffff; + addrp->disp = disp; + addrp->base = db_index_reg_16[rm]; + break; + case 2: + get_value_inc(disp, loc, 2, FALSE); + addrp->disp = disp; + addrp->base = db_index_reg_16[rm]; + break; + } + } else { + if (rm == 4) { + get_value_inc(sib, loc, 1, FALSE); + rm = sib_base(sib); + index = sib_index(sib); + if (index != 4) + addrp->index = db_reg[LONG][index]; + addrp->ss = sib_ss(sib); + } + + switch (mod) { + case 0: + if (rm == 5) { + get_value_inc(addrp->disp, loc, 4, FALSE); + addrp->base = 0; + } else { + addrp->disp = 0; + addrp->base = db_reg[LONG][rm]; + } + break; + case 1: + get_value_inc(disp, loc, 1, TRUE); + addrp->disp = disp; + addrp->base = db_reg[LONG][rm]; + break; + case 2: + get_value_inc(disp, loc, 4, FALSE); + addrp->disp = disp; + addrp->base = db_reg[LONG][rm]; + break; + } + } + return (loc); +} + +void +db_print_address(seg, size, addrp) + char * seg; + int size; + struct i_addr *addrp; +{ + if (addrp->is_reg) { + db_printf("%s", db_reg[size][addrp->disp]); + return; + } + + if (seg) + db_printf("%s:", seg); + + db_printsym((db_addr_t)addrp->disp, DB_STGY_ANY, db_printf); + if (addrp->base != 0 || addrp->index != 0) { + db_printf("("); + if (addrp->base) + db_printf("%s", addrp->base); + if (addrp->index) + db_printf(",%s,%d", addrp->index, 1<<addrp->ss); + db_printf(")"); + } +} + +/* + * Disassemble floating-point ("escape") instruction + * and return updated location. + */ +db_addr_t +db_disasm_esc(loc, inst, short_addr, size, seg) + db_addr_t loc; + int inst; + int short_addr; + int size; + char * seg; +{ + int regmodrm; + struct finst *fp; + int mod; + struct i_addr address; + char * name; + + get_value_inc(regmodrm, loc, 1, FALSE); + fp = &db_Esc_inst[inst - 0xd8][f_reg(regmodrm)]; + mod = f_mod(regmodrm); + if (mod != 3) { + if (*fp->f_name == '\0') { + db_printf("<bad instruction>"); + return (loc); + } + + /* + * Normal address modes. + */ + loc = db_read_address(loc, short_addr, regmodrm, &address); + db_printf(fp->f_name); + switch(fp->f_size) { + case SNGL: + db_printf("s"); + break; + case DBLR: + db_printf("l"); + break; + case EXTR: + db_printf("t"); + break; + case WORD: + db_printf("s"); + break; + case LONG: + db_printf("l"); + break; + case QUAD: + db_printf("q"); + break; + default: + break; + } + db_printf("\t"); + db_print_address(seg, BYTE, &address); + } else { + /* + * 'reg-reg' - special formats + */ + switch (fp->f_rrmode) { + case op2(ST,STI): + name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; + db_printf("%s\t%%st,%%st(%d)",name,f_rm(regmodrm)); + break; + case op2(STI,ST): + name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; + db_printf("%s\t%%st(%d),%%st",name, f_rm(regmodrm)); + break; + case op1(STI): + name = (fp->f_rrname) ? fp->f_rrname : fp->f_name; + db_printf("%s\t%%st(%d)",name, f_rm(regmodrm)); + break; + case op1(X): + name = ((char * const *)fp->f_rrname)[f_rm(regmodrm)]; + if (*name == '\0') + goto bad; + db_printf("%s", name); + break; + case op1(XA): + name = ((char * const *)fp->f_rrname)[f_rm(regmodrm)]; + if (*name == '\0') + goto bad; + db_printf("%s\t%%ax", name); + break; + default: + bad: + db_printf("<bad instruction>"); + break; + } + } + + return (loc); +} + +/* * Disassemble instruction at 'loc'. 'altfmt' specifies an * (optional) alternate format. Return address of start of * next instruction. @@ -52,5 +1081,288 @@ db_disasm(loc, altfmt) db_addr_t loc; boolean_t altfmt; { - return loc; + int inst; + int size; + int short_addr; + char * seg; + struct inst * ip; + char * i_name; + int i_size; + int i_mode; + int regmodrm = 0; + boolean_t first; + int displ; + int prefix; + int imm; + int imm2; + int len; + struct i_addr address; + + get_value_inc(inst, loc, 1, FALSE); + short_addr = FALSE; + size = LONG; + seg = 0; + + /* + * Get prefixes + */ + prefix = TRUE; + do { + switch (inst) { + case 0x66: /* data16 */ + size = WORD; + break; + case 0x67: + short_addr = TRUE; + break; + case 0x26: + seg = "%es"; + break; + case 0x36: + seg = "%ss"; + break; + case 0x2e: + seg = "%cs"; + break; + case 0x3e: + seg = "%ds"; + break; + case 0x64: + seg = "%fs"; + break; + case 0x65: + seg = "%gs"; + break; + case 0xf0: + db_printf("lock "); + break; + case 0xf2: + db_printf("repne "); + break; + case 0xf3: + db_printf("repe "); /* XXX repe VS rep */ + break; + default: + prefix = FALSE; + break; + } + if (prefix) + get_value_inc(inst, loc, 1, FALSE); + } while (prefix); + + if (inst >= 0xd8 && inst <= 0xdf) { + loc = db_disasm_esc(loc, inst, short_addr, size, seg); + db_printf("\n"); + return (loc); + } + + if (inst == 0x0f) { + get_value_inc(inst, loc, 1, FALSE); + ip = db_inst_0f[inst>>4]; + if (ip == 0) + ip = &db_bad_inst; + else + ip = &ip[inst&0xf]; + } else { + ip = &db_inst_table[inst]; + } + + if (ip->i_has_modrm) { + get_value_inc(regmodrm, loc, 1, FALSE); + loc = db_read_address(loc, short_addr, regmodrm, &address); + } + + i_name = ip->i_name; + i_size = ip->i_size; + i_mode = ip->i_mode; + + if (ip->i_extra == db_Grp1 || ip->i_extra == db_Grp2 || + ip->i_extra == db_Grp6 || ip->i_extra == db_Grp7 || + ip->i_extra == db_Grp8 || ip->i_extra == db_Grp9 || + ip->i_extra == db_GrpA || ip->i_extra == db_GrpB) { + i_name = ((char **)ip->i_extra)[f_reg(regmodrm)]; + } else if (ip->i_extra == db_Grp3) { + ip = (struct inst *)ip->i_extra; + ip = &ip[f_reg(regmodrm)]; + i_name = ip->i_name; + i_mode = ip->i_mode; + } else if (ip->i_extra == db_Grp4 || ip->i_extra == db_Grp5) { + ip = (struct inst *)ip->i_extra; + ip = &ip[f_reg(regmodrm)]; + i_name = ip->i_name; + i_mode = ip->i_mode; + i_size = ip->i_size; + } + + if (i_size == SDEP) { + if (size == WORD) + db_printf("%s", i_name); + else + db_printf("%s", ip->i_extra); + } else { + db_printf("%s", i_name); + if (i_size != NONE) { + if (i_size == BYTE) { + db_printf("b"); + size = BYTE; + } else if (i_size == WORD) { + db_printf("w"); + size = WORD; + } else if (size == WORD) { + db_printf("w"); + } else { + db_printf("l"); + } + } + } + db_printf("\t"); + for (first = TRUE; + i_mode != 0; + i_mode >>= 8, first = FALSE) { + if (!first) + db_printf(","); + + switch (i_mode & 0xFF) { + case E: + db_print_address(seg, size, &address); + break; + case Eind: + db_printf("*"); + db_print_address(seg, size, &address); + break; + case El: + db_print_address(seg, LONG, &address); + break; + case Ew: + db_print_address(seg, WORD, &address); + break; + case Eb: + db_print_address(seg, BYTE, &address); + break; + case R: + db_printf("%s", db_reg[size][f_reg(regmodrm)]); + break; + case Rw: + db_printf("%s", db_reg[WORD][f_reg(regmodrm)]); + break; + case Ri: + db_printf("%s", db_reg[size][f_rm(inst)]); + break; + case Ril: + db_printf("%s", db_reg[LONG][f_rm(inst)]); + break; + case S: + db_printf("%s", db_seg_reg[f_reg(regmodrm)]); + break; + case Si: + db_printf("%s", db_seg_reg[f_reg(inst)]); + break; + case A: + db_printf("%s", db_reg[size][0]); /* acc */ + break; + case BX: + if (seg) + db_printf("%s:", seg); + db_printf("(%s)", short_addr ? "%bx" : "%ebx"); + break; + case CL: + db_printf("%%cl"); + break; + case DX: + db_printf("%%dx"); + break; + case SI: + if (seg) + db_printf("%s:", seg); + db_printf("(%s)", short_addr ? "%si" : "%esi"); + break; + case DI: + db_printf("%%es:(%s)", short_addr ? "%di" : "%edi"); + break; + case CR: + db_printf("%%cr%d", f_reg(regmodrm)); + break; + case DR: + db_printf("%%dr%d", f_reg(regmodrm)); + break; + case TR: + db_printf("%%tr%d", f_reg(regmodrm)); + break; + case I: + len = db_lengths[size]; + get_value_inc(imm, loc, len, FALSE); + db_printf("$%#n", imm); + break; + case Is: + len = db_lengths[size]; + get_value_inc(imm, loc, len, TRUE); + db_printf("$%#r", imm); + break; + case Ib: + get_value_inc(imm, loc, 1, FALSE); + db_printf("$%#n", imm); + break; + case Iba: + get_value_inc(imm, loc, 1, FALSE); + if (imm != 0x0a) + db_printf("$%#n", imm); + break; + case Ibs: + get_value_inc(imm, loc, 1, TRUE); + if (size == WORD) + imm &= 0xFFFF; + db_printf("$%#r", imm); + break; + case Iw: + get_value_inc(imm, loc, 2, FALSE); + db_printf("$%#n", imm); + break; + case O: + if (short_addr) + get_value_inc(displ, loc, 2, TRUE); + else + get_value_inc(displ, loc, 4, TRUE); + if (seg) + db_printf("%s:%#r",seg, displ); + else + db_printsym((db_addr_t)displ, DB_STGY_ANY, + db_printf); + break; + case Db: + get_value_inc(displ, loc, 1, TRUE); + displ += loc; + if (size == WORD) + displ &= 0xFFFF; + db_printsym((db_addr_t)displ, DB_STGY_XTRN, db_printf); + break; + case Dl: + len = db_lengths[size]; + get_value_inc(displ, loc, len, FALSE); + displ += loc; + if (size == WORD) + displ &= 0xFFFF; + db_printsym((db_addr_t)displ, DB_STGY_XTRN, db_printf); + break; + case o1: + db_printf("$1"); + break; + case o3: + db_printf("$3"); + break; + case OS: + get_value_inc(imm, loc, len, FALSE); /* offset */ + get_value_inc(imm2, loc, 2, FALSE); /* segment */ + db_printf("$%#n,%#n", imm2, imm); + break; + } + } + + if (altfmt == 0 && (inst == 0xe9 || inst == 0xeb)) { + /* + * GAS pads to longword boundary after unconditional jumps. + */ + loc = (loc + (4-1)) & ~(4-1); + } + db_printf("\n"); + return (loc); } |