Annotation of gforth/arch/mips/disasm.fs, revision 1.3
1.1 anton 1: \ disasm.fs disassembler file (for MIPS R3000)
2: \
3: \ Copyright (C) 1995-97 Martin Anton Ertl, Christian Pirker
4: \
5: \ This file is part of RAFTS.
6: \
7: \ RAFTS is free software; you can redistribute it and/or
8: \ modify it under the terms of the GNU General Public License
9: \ as published by the Free Software Foundation; either version 2
10: \ of the License, or (at your option) any later version.
11: \
12: \ This program is distributed in the hope that it will be useful,
13: \ but WITHOUT ANY WARRANTY; without even the implied warranty of
14: \ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15: \ GNU General Public License for more details.
16: \
17: \ You should have received a copy of the GNU General Public License
18: \ along with this program; if not, write to the Free Software
19: \ Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
20:
1.3 ! anton 21: : disasm-illegal ( addr w -- )
! 22: \ disassemble illegal instruction w at addr
! 23: hex. ." , ( illegal inst ) " drop ;
1.2 anton 24:
1.3 ! anton 25: : init-disasm-table ( n -- )
! 26: \ initialize table with n entries with disasm-illegal
! 27: 0 ?do
! 28: ['] disasm-illegal ,
! 29: loop ;
1.2 anton 30:
1.3 ! anton 31: create opc-table $40 init-disasm-table \ top-level decode table
! 32: create funct-table $40 init-disasm-table \ special function table
! 33: create regimm-table $20 init-disasm-table \ regim instructions rt field
! 34: create copz-rs-table $20 init-disasm-table \ COPz instructions rs field
! 35: create copz-rt-table $20 init-disasm-table \ COPz instructions rt field
! 36: create cp0-table $40 init-disasm-table \ COP0 function table
! 37:
! 38: \ fields
! 39:
! 40: : disasm-op ( w -- u )
! 41: 26 rshift ;
! 42:
! 43: : disasm-rs ( w -- u )
! 44: 21 rshift $1F and ;
! 45:
! 46: : disasm-rt ( w -- u )
! 47: 16 rshift $1f and ;
! 48:
! 49: : disasm-rd ( w -- u )
! 50: 11 rshift $1f and ;
! 51:
! 52: : disasm-shamt ( w -- u )
! 53: \ shift amount field
! 54: 6 rshift $1f and ;
! 55:
! 56: : disasm-funct ( w -- u )
! 57: $3f and ;
! 58:
! 59: : disasm-copz ( w -- u )
! 60: disasm-op 3 and ;
! 61:
! 62: : disasm-imm ( w -- n )
! 63: $ffff and dup 15 rshift negate 15 lshift or ;
! 64:
! 65: : disasm-relative ( addr n -- w )
! 66: \ compute printable form of relative address n relative to addr
! 67: nip ( + ) ;
! 68:
! 69: \ disassembler central decode cascade
! 70:
! 71: : disasm-inst ( addr w -- )
! 72: \G disassemble instruction w at addr (addr is used for computing
! 73: \G branch targets)
! 74: dup disasm-op cells opc-table + @ execute ;
! 75:
! 76: : disasm-dump ( addr u -- ) \ gforth
! 77: \G disassemble u aus starting at addr
! 78: bounds u+do
! 79: cr ." ( " i hex. ." ) " i i @ disasm-inst
! 80: 1 cells +loop ;
! 81:
! 82: : disasm-special ( addr w -- )
! 83: \ disassemble inst with opcode special
! 84: dup disasm-funct cells funct-table + @ execute ;
! 85: ' disasm-special 0 cells opc-table + !
! 86:
! 87: : disasm-regimm ( addr w -- )
! 88: \ disassemble regimm inst
! 89: dup disasm-rt cells regimm-table + @ execute ;
! 90: ' disasm-regimm 1 cells opc-table + !
! 91:
! 92: : disasm-copz-rs ( addr w -- )
! 93: \ disassemble inst with opcode COPz
! 94: dup disasm-rs cells copz-rs-table + @ execute ;
! 95: ' disasm-copz-rs $10 cells opc-table + !
! 96: ' disasm-copz-rs $11 cells opc-table + !
! 97: ' disasm-copz-rs $12 cells opc-table + !
! 98:
! 99: : disasm-copz-rt ( addr w -- )
! 100: \ disassemble inst with opcode COPz, rs=BC
! 101: dup disasm-rt cells copz-rt-table + @ execute ;
! 102: ' disasm-copz-rt $08 cells copz-rs-table + !
! 103:
! 104: : disasm-cp0 ( addr w -- )
! 105: \ disassemble inst with opcode COPz, rs=CO
! 106: dup disasm-funct cells cp0-table + @ execute ;
! 107: ' disasm-cp0 $10 cells copz-rs-table + !
! 108:
! 109: \ disassemble various formats
! 110:
! 111: : asm-op ( -- ) ;
! 112:
! 113: : disasm-J-target ( addr w -- )
! 114: \ print jump target
! 115: $3ffffff and swap $fc000000 and or hex. ;
! 116:
! 117: : asm-J-target ( u "inst" -- ; compiled code: addr w -- )
! 118: \ disassemble jump inst with opcode u
! 119: :noname POSTPONE disasm-J-target
! 120: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 121: swap cells opc-table + ! ;
! 122:
! 123: : disasm-I-rs,rt,imm ( addr w -- )
! 124: dup disasm-rs .
! 125: dup disasm-rt .
! 126: disasm-imm disasm-relative . ;
! 127:
! 128: : asm-I-rs,rt,imm ( u "name" -- ; compiled code: addr w -- )
! 129: :noname POSTPONE disasm-I-rs,rt,imm
! 130: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 131: swap cells opc-table + ! ;
! 132:
! 133: : asm-rt ( -- ) ;
! 134:
! 135: : disasm-I-rs,imm ( addr w -- )
! 136: \ !! does not check for correctly set rt ( should be 0 )
! 137: dup disasm-rs .
! 138: disasm-imm disasm-relative . ;
! 139:
! 140: : asm-I-rs,imm ( u1 u2 "name" -- ; compiled code: addr w -- )
! 141: :noname POSTPONE disasm-I-rs,imm
! 142: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 143: swap cells opc-table + ! ;
! 144:
! 145: : disasm-rt,rs,imm ( addr w -- )
! 146: dup disasm-rt .
! 147: dup disasm-rs .
! 148: disasm-imm .
! 149: drop ;
1.1 anton 150:
1.3 ! anton 151: : asm-I-rt,rs,imm ( u "name" -- ; compiled code: addr w -- )
! 152: :noname POSTPONE disasm-rt,rs,imm
! 153: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 154: swap cells opc-table + ! ;
! 155:
! 156: : disasm-rt,imm ( addr w -- )
! 157: dup disasm-rt .
! 158: disasm-imm .
1.1 anton 159: drop ;
160:
1.3 ! anton 161: : asm-I-rt,imm ( u "name" -- ; compiled code: addr w -- )
! 162: :noname POSTPONE disasm-rt,imm
! 163: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 164: swap cells opc-table + ! ;
! 165:
! 166: : disasm-rt,imm,rs ( addr w -- )
! 167: dup disasm-rt .
! 168: dup disasm-imm .
! 169: dup disasm-rs .
! 170: 2drop ;
! 171:
! 172: : asm-I-rt,offset,rs ( u "name" -- ; compiled code: addr w -- )
! 173: :noname POSTPONE disasm-rt,imm,rs
! 174: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 175: swap cells opc-table + ! ;
! 176:
! 177: : disasm-rd,rt,sa ( addr w -- )
! 178: dup disasm-rd .
! 179: dup disasm-rt .
! 180: dup disasm-shamt .
! 181: 2drop ;
! 182:
! 183: : asm-special-rd,rt,sa ( u "name" -- ; compiled code: addr w -- )
! 184: :noname POSTPONE disasm-rd,rt,sa
! 185: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 186: swap cells funct-table + ! ;
! 187:
! 188: : disasm-rd,rt,rs ( addr w -- )
! 189: dup disasm-rd .
! 190: dup disasm-rt .
! 191: dup disasm-rs .
! 192: 2drop ;
! 193:
! 194: : asm-special-rd,rt,rs ( u "name" -- ; compiled code: addr w -- )
! 195: :noname POSTPONE disasm-rd,rt,rs
! 196: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 197: swap cells funct-table + ! ;
! 198:
! 199: : disasm-rs. ( addr w -- )
! 200: dup disasm-rs .
! 201: 2drop ;
! 202:
! 203: : asm-special-rs ( u "name" -- ; compiled code: addr w -- )
! 204: :noname POSTPONE disasm-rs.
! 205: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 206: swap cells funct-table + ! ;
! 207:
! 208: : disasm-rd,rs ( addr w -- )
! 209: dup disasm-rd .
! 210: dup disasm-rs .
! 211: 2drop ;
! 212:
! 213: : asm-special-rd,rs ( u "name" -- ; compiled code: addr w -- )
! 214: :noname POSTPONE disasm-rd,rs
! 215: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 216: swap cells funct-table + ! ;
! 217:
! 218: : asm-special-nothing ( u "name" -- ; compiled code: addr w -- )
! 219: :noname POSTPONE 2drop
! 220: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 221: swap cells funct-table + ! ;
! 222:
! 223: : disasm-rd. ( addr w -- )
! 224: dup disasm-rd .
! 225: 2drop ;
! 226:
! 227: : asm-special-rd ( u "name" -- ; compiled code: addr w -- )
! 228: :noname POSTPONE disasm-rd.
! 229: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 230: swap cells funct-table + ! ;
! 231:
! 232: : disasm-rs,rt ( addr w -- )
! 233: dup disasm-rs .
! 234: dup disasm-rt .
! 235: 2drop ;
! 236:
! 237: : asm-special-rs,rt ( u "name" -- ; compiled code: addr w -- )
! 238: :noname POSTPONE disasm-rs,rt
! 239: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 240: swap cells funct-table + ! ;
! 241:
! 242: : disasm-rd,rs,rt ( addr w -- )
! 243: dup disasm-rd .
! 244: dup disasm-rs .
! 245: dup disasm-rt .
! 246: 2drop ;
! 247:
! 248: : asm-special-rd,rs,rt ( u "name" -- ; compiled code: addr w -- )
! 249: :noname POSTPONE disasm-rd,rs,rt
! 250: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 251: swap cells funct-table + ! ;
! 252:
! 253: : asm-regimm-rs,imm ( u "name" -- )
! 254: :noname POSTPONE disasm-I-rs,imm
! 255: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 256: swap cells regimm-table + ! ;
! 257:
! 258: : asm-copz-rt,offset,rs ( u "name" -- )
! 259: \ ignore these insts, we disassemble using asm-I-rt,offset,rs
! 260: drop name 2drop ;
! 261:
! 262: : asm-copz0 ( u "name" -- )
! 263: :noname POSTPONE 2drop
! 264: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 265: swap cells cp0-table + ! ;
! 266:
! 267: $00 constant asm-copz-MF
! 268: $02 constant asm-copz-CF
! 269: $04 constant asm-copz-MT
! 270: $06 constant asm-copz-CT
! 271: $08 constant asm-copz-BC
! 272: $10 constant asm-copz-C0
! 273:
! 274: $00 constant asm-copz-BCF
! 275: $01 constant asm-copz-BCT
! 276:
! 277: : asm-rs ( -- ) ;
! 278:
! 279: : disasm-rt,rd,z ( addr w -- )
! 280: dup disasm-rt .
! 281: dup disasm-rd .
! 282: dup disasm-copz .
! 283: 2drop ;
! 284:
! 285: : asm-copz-rt,rd ( u1 u2 "name" -- )
! 286: drop :noname POSTPONE disasm-rt,rd,z
! 287: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 288: swap cells copz-rs-table + ! ;
! 289:
! 290: : disasm-I-imm ( addr w -- )
! 291: disasm-imm disasm-relative . ;
! 292:
! 293: : asm-copz-imm ( u1 u2 u3 "name" -- )
! 294: drop nip :noname POSTPONE disasm-I-imm
! 295: name POSTPONE sliteral POSTPONE type POSTPONE ;
! 296: swap cells copz-rt-table + ! ;
1.1 anton 297:
1.3 ! anton 298: include ./insts.fs
FreeBSD-CVSweb <freebsd-cvsweb@FreeBSD.org>
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to disasm.fs CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [gforth] / gforth / arch / mips