wok annotate linld/stuff/src/pipehole.awk @ rev 24013

linld: add quick boot switch
author Pascal Bellard <pascal.bellard@slitaz.org>
date Thu Feb 18 08:56:43 2021 +0000 (2021-02-18)
parents 5c1ce90eb1d6
children 14ca5e18cfd9
rev   line source
pascal@21791 1 BEGIN { hold=0; is386=0; isload=0; isiso=0; istazboot=0; wascall=0; ishimem=0; label="none"; xlabel=""; file="" }
pascal@20458 2 function isnum(n) { return match(n,/^[0-9+-]/) }
pascal@20458 3 {
pascal@20632 4 sub(/segment word public/,"segment byte public")
pascal@20634 5
pascal@22171 6 if (/^ ; $/) next
pascal@21576 7 if (/^@.*:$/ || / endp$/) afterjmp=0
pascal@21791 8 if (/^ \.386p$/) is386=1
pascal@21791 9 if (file == "" && /debug S/) { file=$3; gsub(/\"/,"",file) }
pascal@21984 10 if (/debug S/) print " %PAGESIZE 1000"
pascal@21984 11 if (file == "linld.cpp") {
pascal@24013 12 if (/\[si/ || /si,/ || /,si/) sub(/si/,"di")
pascal@24013 13 else if (/\[di/ || /di,/ || /,di/) sub(/di/,"si")
pascal@21984 14 if (/add di,2/) $0=" scasw ; " $0
pascal@24013 15 if (/bx,di/ || /\[bp-2\]/) next
pascal@24013 16 sub(/\[bx\],0/,"[di],0")
pascal@21984 17 if (islinld==1) {
pascal@24013 18 if (/,word.*/) islinld=0
pascal@21984 19 print "; " $0
pascal@24013 20 next
pascal@21984 21 }
pascal@21984 22 if (/^_main proc/) islinld=1
pascal@21984 23 if (/image\|initrd/) islinld=3
pascal@24013 24 if (islinld==3 && /bx,word ptr/) { print "; " $0; next }
pascal@21984 25 if (/fileexist\$qpxzc/) islinld=4
pascal@21984 26 if (islinld==4) {
pascal@23993 27 if (/ax,-1/) {
pascal@23993 28 print " inc ax"
pascal@24013 29 print " mov ax,word ptr [di]"
pascal@23993 30 next
pascal@23993 31 }
pascal@23993 32 if (/ax,word ptr/) next
pascal@21984 33 }
pascal@23992 34 if (/buf_cmdline\+1/) {
pascal@23992 35 islinld=5
pascal@23996 36 print " mov bx,offset DGROUP:_buf_cmdline+1"
pascal@23996 37 sub(/offset DGROUP:_buf_cmdline\+1/,"bx")
pascal@23992 38 }
pascal@23804 39 if (islinld==5) {
pascal@23996 40 if (/bx,offset DGROUP:_buf_cmdline/) $0=" dec bx"
pascal@23993 41 if (/ax,word ptr/) next
pascal@23992 42 if (/call/) islinld=0
pascal@23804 43 }
pascal@23996 44 if (/bx,word ptr DGROUP:_cmdstr\+6/) next
pascal@23996 45 if (/_cmdstr\+6,0/) {
pascal@24013 46 print " mov bx,word ptr [si+6]"
pascal@23996 47 $0=" or bx,bx"
pascal@23996 48 }
pascal@21984 49 } # file == "linld.cpp"
pascal@21791 50 if (file == "himem.cpp") {
pascal@23989 51 if (/sp,bp/ || /pop bp/) next
pascal@21984 52 if (/void load_image/) ishimem=1
pascal@21791 53 if (ishimem == 1 && is386 == 0) {
pascal@21791 54 if (/si\+8\]$/ || /si\+4\]$/ || /si\+16\]$/) next
pascal@21791 55 if (/si\+6\]$/ || /si\+2\]$/ || /si\+14\]$/) sub(/mov dx,/,"les dx,d")
pascal@24013 56 if (/si\+12\],ax/ || /si\+16\],ax/ || /di\+2\],ax/ || /DGROUP:_himem_buf\+2,ax/) sub(/,ax/,",es")
pascal@23996 57 if (/dx,dword ptr \[si\+14\]/ || /DGROUP:_himem_buf,dx/) sub(/dx/,"ax")
pascal@21984 58 }
pascal@21984 59 if (ishimem == 1) {
pascal@21984 60 if (/do \{/) ishimem=2
pascal@23991 61 if (/bx,si/ || /push bp/ || /bp,sp/ || /push di/ || /push si/) next
pascal@23996 62 if (/sp,2/ || /bp\+4/) next
pascal@21984 63 }
pascal@21984 64 if (ishimem == 2) {
pascal@21984 65 if (/movzx/) print " cwde"
pascal@23996 66 if (/bp-2/ || /di,ax/ || /bx,di/ || /bx,si/) next
pascal@21984 67 if (/storepage.bufv/) {
pascal@21984 68 print " inc ax"
pascal@21984 69 print " push ax"
pascal@21984 70 }
pascal@21984 71 if (/buf \+= size;/) {
pascal@21984 72 print " pop ax"
pascal@21984 73 }
pascal@23996 74 if (/i\+12/) ishimem=20
pascal@23996 75 }
pascal@23996 76 if (ishimem == 20) {
pascal@24013 77 if (/loadfail/) next
pascal@23996 78 if (/je/) {
pascal@23996 79 print " extrn jmploadfailure"
pascal@23996 80 $0=" jne short jmploadfailure"
pascal@23996 81 }
pascal@23989 82 if (/endp/) ishimem=0
pascal@21791 83 }
pascal@23992 84 if (/@memcpy_image\$qp11image_himem/) next
pascal@24013 85 if (/far last_ditch/) ishimem=3
pascal@23992 86 if (ishimem == 3) {
pascal@23996 87 sub(/DGROUP:_imgs\+4,/,"[si+4],")
pascal@24013 88 if (/bx,di/ || /di,ax/) next
pascal@23992 89 }
pascal@21791 90 } # file == "himem.cpp"
pascal@21791 91 if (file == "load.cpp") {
pascal@23996 92 if (isload != 3 && isload != 6) { # LOAD.LST
pascal@23996 93 if (/,si/ || /si,/ || /\[si/) sub(/si/,"di")
pascal@23996 94 else if (/,di/ || /di,/ || /\[di/) sub(/di/,"si")
pascal@23996 95 }
pascal@23996 96 if (/moverm\(/) isload=16
pascal@23996 97 if (isload != 16 && /bx,si/) next
pascal@23996 98 if (/@moverm/) isload=0
pascal@23992 99 if (/readrm\(m, 0x200/) isload=15
pascal@23992 100 if (isload == 15) { # LOAD.LST
pascal@23996 101 if (/bx,si/) next
pascal@23992 102 if (/call/) isload=0
pascal@23992 103 }
pascal@23989 104 if (/load_image\(/) {
pascal@23989 105 if (isload == 3) isload=13
pascal@23989 106 else isload=14
pascal@23989 107 }
pascal@23989 108 if (isload == 14) { # LOAD.LST
pascal@23996 109 if (/call/) $0=" jmp short load_imagez"
pascal@23989 110 if (/ret/) isload=0
pascal@23989 111 if (/pop/ || /ret/ || /push/) next
pascal@23989 112 }
pascal@23989 113 if (isload == 13) { # LOAD.LST
pascal@23991 114 if (/pop/) isload=3
pascal@23991 115 if (/push/ || /call/ || /pop/) next
pascal@23989 116 }
pascal@22152 117 if (/i\+21\],513$/) isload=11
pascal@21984 118 if (isload == 12) { # LOAD.LST
pascal@21984 119 if (/cmp/) next
pascal@21984 120 if (/jb/) isload=0
pascal@21984 121 sub(/jb/,"jcxz")
pascal@21984 122 }
pascal@21984 123 if (isload == 11) { # LOAD.LST
pascal@21984 124 if (/cmp/) {
pascal@21984 125 print " mov cx,513"
pascal@22152 126 sub(/cmp /,"sub cx,")
pascal@22152 127 sub(/,513/,"")
pascal@21984 128 }
pascal@21984 129 if (/jb/) isload=12
pascal@21984 130 sub(/jb/,"ja")
pascal@21984 131 }
pascal@22170 132 sub(/_imgs\+65534/,"_imgs-2")
pascal@21791 133 if (/setup_sects == 0/) isload=9
pascal@21791 134 if (isload == 9) { # LOAD.LST
pascal@23999 135 sub(/,0/,",al ; worst case 2k boundary (iso)")
pascal@21791 136 if (/jne/) isload=0
pascal@21791 137 }
pascal@21757 138 if (/cmd_line_ptr =/ && is386 == 0) isload=7
pascal@21757 139 if (isload == 7) { # LOAD.LST
pascal@22181 140 if (/add/ || /xor/ || /extrn/ || /N_LXLSH@/ || /cl,4/ || /,ax/) next
pascal@22170 141 if (/enable A20 if needed/) { print nextinst; isload=0 }
pascal@22152 142 if (/i-463/) $0=" mov bx,-463"
pascal@22170 143 if (/i-465/) {
pascal@22170 144 sub(/465/,"2"); sub(/\[/,"[bx+")
pascal@22170 145 nextinst=$0; sub(/-2\],-23745/,"],8000h",nextinst)
pascal@22170 146 }
pascal@21757 147 if (/,dx/) {
pascal@21757 148 print " mov cl,12"
pascal@21757 149 print " shr ax,cl"
pascal@22181 150 print " mov bx,55"
pascal@21757 151 sub(/dx/,"ax")
pascal@21757 152 }
pascal@21757 153 }
pascal@23992 154 if (/pm_low == 0/) {
pascal@23991 155 print " push di"
pascal@23996 156 print " push si"
pascal@23991 157 isload=6
pascal@23991 158 }
pascal@21757 159 if (isload == 6) { # LOAD.LST
pascal@23991 160 if (/si\+2/) {
pascal@23991 161 print " cmpsw"
pascal@23991 162 next
pascal@23991 163 }
pascal@23989 164 if (/les/) sub(/bx,/,"di,")
pascal@23991 165 if (/bx\+4/ || /es:/ || /call/ || /pop/ || /ret/) next
pascal@23989 166 if (/si\+6/) {
pascal@23989 167 print " movsw"
pascal@23989 168 print " movsw"
pascal@23989 169 print " movsw"
pascal@23989 170 print " movsw"
pascal@23996 171 print " pop si"
pascal@23991 172 print "load_imagez:"
pascal@21757 173 next
pascal@21757 174 }
pascal@21757 175 }
pascal@21757 176 if (isload == 5) { # LOAD.LST
pascal@21757 177 sub(/ax,/,"bx,")
pascal@23996 178 if (/@puts\$qpxzc/) isload=0
pascal@21757 179 if (/mov bx,ax/) next
pascal@23996 180 sub(/,word ptr \[di\+29\]/,",cx")
pascal@21757 181 }
pascal@23996 182 if (/_cmdnum\+14/ && is386 == 0) isload=4
pascal@22180 183 if (isload == 4) { # LOAD.LST
pascal@23996 184 if (/_cmdnum\+14/) next
pascal@23996 185 if (/_cmdnum\+12$/) {
pascal@23996 186 $0=" les dx,dword ptr [bx+12]"
pascal@21757 187 }
pascal@21791 188 sub(/,ax/,",es")
pascal@22181 189 if (/add ax,word ptr/) $0=" add ax,cx"
pascal@22181 190 if (/i\+29\],0/) {
pascal@22181 191 sub(/,0$/,"")
pascal@22181 192 sub(/cmp /,"mov cx,")
pascal@22181 193 }
pascal@22181 194 sub(/je/,"jcxz")
pascal@23996 195 if (/@strcpy/) isload=0
pascal@23992 196 if (/\+0x200/) isload=5
pascal@21757 197 }
pascal@23996 198 if (/void load_initrd\(\)/) { isload=3; isload2=0 }
pascal@21754 199 if (isload == 3) { # LOAD.LST
pascal@23996 200 if (/cmdstr\+4,0/) {
pascal@23996 201 isload2++
pascal@23996 202 print " mov ax,word ptr DGROUP:_cmdstr+4"
pascal@23996 203 $0=" or ax,ax"
pascal@23996 204 }
pascal@23996 205 if (isload2 && /DGROUP:_cmdstr\+4/) $0=";" $0
pascal@23994 206 if (/je short @2@.*/) sub(/@2@.*/,"load_initrd_ret")
pascal@23992 207 if (/mov ax,word ptr \[si\]/) $0=" lodsw"
pascal@23991 208 if( /jmp/) {
pascal@23991 209 print "load_initrd_ret:"
pascal@23991 210 print " pop si"
pascal@23991 211 print " ret"
pascal@23991 212 next
pascal@23991 213 }
pascal@23996 214 if (/@loadfailure/) {
pascal@23996 215 print " global jmploadfailure:near"
pascal@23996 216 print "jmploadfailure:"
pascal@23996 217 }
pascal@21754 218 sub(/\[di/,"[bx")
pascal@23992 219 sub(/di,/,"bx,")
pascal@21754 220 }
pascal@23996 221 if (/mode = vid_mode/) { isload=2; print " mov bx,offset _cmdnum" }
pascal@21750 222 if (isload == 2) { # LOAD.LST
pascal@23996 223 if (/DGROUP:_cmdnum/) { sub(/DGROUP:_cmdnum/,"[bx"); $0=$0 "]"}
pascal@21750 224 sub(/,0/,""); sub(/cmp /,"mov cx,")
pascal@21750 225 sub(/je/,"jcxz")
pascal@21750 226 if (/ax,word/) next
pascal@21750 227 sub(/,ax/,",cx")
pascal@23992 228 if (/starting linux 1\.3\.73/) isload=0
pascal@21750 229 }
pascal@23996 230 if (/_rm_size=0x200/ || /heap_top = _rm_buf/) isload=1
pascal@21750 231 if (isload == 1) { # LOAD.LST
pascal@21791 232 if (/ptr .die\$qpxzc/) $0="@die@:\n" $0
pascal@21729 233 if (/mov al,byte ptr/ && is386) {
pascal@22152 234 sub(/mov al/,"movzx eax")
pascal@21729 235 }
pascal@21791 236 if (is386 == 0) {
pascal@23999 237 if (/m->size -= _rm_size/) print " cwd ; do not trust rewind result (iso case)"
pascal@21791 238 sub(/,0$/,",dx")
pascal@21791 239 }
pascal@21729 240 if (/ax,word ptr/) next
pascal@21729 241 if (/^ call/) isload=0
pascal@21729 242 }
pascal@21791 243 } # file == "load.cpp"
pascal@21791 244 if (file == "iso9660.cpp") {
pascal@23996 245 if (/ptr \[si\+10\],dx/) next
pascal@23996 246 if (/ptr \[si\+8\],ax/) next
pascal@23996 247 if (/si\+32/) next
pascal@23996 248 if (/add word ptr \[si\],ax/) $0=" add word ptr [si],cx"
pascal@23996 249 if (/ax,word ptr \[si\+24\]/) sub(/mov ax,/,"les ax,d")
pascal@23996 250 if (/ax,word ptr \[si\+26\]/) next
pascal@23996 251 if (/word ptr \[si\+29\],ax/) sub(/ax/,"es")
pascal@23996 252 if (/\[si\],-1/) $0=" not word ptr [si]"
pascal@23996 253 sub(/di,word ptr DGROUP:_isostate\+2/,"di,word ptr [si+2]")
pascal@23996 254 if (isiso == 19) { # ISO9660.LST
pascal@23996 255 if (/short @2@282/) $0=" jc restoreC"
pascal@23996 256 if (/bp-2/ || /si\+34/ || /ax,dx/ || /cmp ax,-1/) next
pascal@23996 257 sub(/dx,/,"bx,")
pascal@23996 258 if (/short @2@282/) sub(/je/,"jnc")
pascal@23996 259 if (/\[si\+37\],0/) sub(/,0/,",ch")
pascal@23996 260 if (/@strcmp\$qpxzct1/) {
pascal@23996 261 print
pascal@23996 262 print "restoreC:"
pascal@23996 263 $0=" mov byte ptr [di],cl ; c"
pascal@23996 264 isiso=1
pascal@23996 265 }
pascal@23996 266 }
pascal@23996 267 if (/ax,-8/) { isiso=18; next }
pascal@23996 268 if (isiso == 18) { # ISO9660.LST
pascal@23996 269 if (/ax,ax/) { isiso=0;next }
pascal@23996 270 sub(/mov/,"sub")
pascal@23996 271 sub(/,ax/,",8")
pascal@23996 272 }
pascal@23996 273 if (isiso == 17) { # ISO9660.LST
pascal@23996 274 if (/inc di/) $0="; " $0
pascal@23996 275 if (/_isostate\+205/) {
pascal@23996 276 print
pascal@23996 277 $0=" jmp setdirofsnsz"
pascal@23996 278 }
pascal@23996 279 else sub(/ax/,"bx")
pascal@23996 280 if (/si\+24/) isiso=0
pascal@23996 281 if (/,bx/) next
pascal@23996 282 if (/isoreadrootsector/) {
pascal@23996 283 print
pascal@23999 284 print " xor word ptr [si+39],17475 ; clear C"
pascal@23999 285 $0=" jne returnNotC"
pascal@23996 286 }
pascal@23996 287 }
pascal@23996 288 if (/cpytodirpage.x->dirpage/) isiso=16
pascal@23996 289 if (isiso == 16) { # ISO9660.LST
pascal@23996 290 if (/filesize2dirsize/) {
pascal@23996 291 print " mov bx,word ptr [si+9]"
pascal@23996 292 print " mov ax,word ptr [si+13]"
pascal@23996 293 print "setdirofsnsz:"
pascal@23996 294 print " mov word ptr [si+26],bx"
pascal@23996 295 }
pascal@23996 296 if (/ax,/ || /si\+13/ || /si\+26/) next
pascal@23996 297 if (/si\+24/) isiso=1
pascal@23996 298 }
pascal@23996 299 if (/found:/) isiso=15
pascal@23996 300 if (/short @1@394/) sub(/@1@394/,"@1@422")
pascal@23996 301 if (isiso != 15 && /si,offset DGROUP:_isostate/) $0=";" $0
pascal@23996 302 if (isiso == 15) { # ISO9660.LST
pascal@23996 303 if (/xor/) {
pascal@23996 304 print "returnNotC:"
pascal@23996 305 print " cmc"
pascal@23996 306 print "returnC:"
pascal@23996 307 print "@1@422:"
pascal@23996 308 print " sbb ax,ax"
pascal@23996 309 print "return:"
pascal@23996 310 next
pascal@23996 311 }
pascal@23996 312 if (/@1@422:/ || /bp$/ || /bp,sp/ || /sp,2/) next
pascal@23996 313 if (/\[di\],47/) isiso=17
pascal@23996 314 }
pascal@23996 315 if (/short @1@142/) { isiso=14; next }
pascal@23989 316 if (isiso == 14) { # ISO9660.LST
pascal@23996 317 if (/ax,-1/) next
pascal@23996 318 if (/jmp @1@422/) sub(/jmp/,"jb")
pascal@23989 319 }
pascal@23988 320 if (/p = x->buffer \+ 34/) isiso=13
pascal@23988 321 if (isiso == 13) { # ISO9660.LST
pascal@23988 322 if (/di,si/) $0=" xchg ax,bx"
pascal@23996 323 if (/di,ax/) $0=" lea di,[si+bx+72]"
pascal@23996 324 if (/di,72/) {
pascal@23988 325 isiso=0
pascal@23988 326 next
pascal@23988 327 }
pascal@23988 328 }
pascal@23870 329 if (/register len/) isiso=12
pascal@23870 330 if (isiso == 12) { # ISO9660.LST
pascal@23996 331 if (/di\+2/) sub(/al/,"bl")
pascal@23996 332 if (/cbw/) next
pascal@23996 333 sub(/dx,ax/,"bh,0")
pascal@23870 334 if (/bx,dx/) next
pascal@23870 335 sub(/i,dx/,"i,bx")
pascal@23996 336 sub(/bx\+di\],0/,"bx+di],bh")
pascal@23870 337 if (/while/) isiso=0
pascal@23870 338 }
pascal@23863 339 if (/curpos >= SECT/) isiso=10
pascal@23863 340 if (isiso == 10) { # ISO9660.LST
pascal@23863 341 if (/cmp/) {
pascal@23863 342 sub(/cmp /,"mov bx,")
pascal@23863 343 sub(/i.*/,"i]")
pascal@23863 344 print
pascal@23863 345 $0=" cmp bh,2048/256"
pascal@23863 346 }
pascal@23863 347 if (/mov/) {
pascal@23863 348 isiso=0
pascal@23863 349 next
pascal@23863 350 }
pascal@23863 351 }
pascal@21791 352 if (/<< SECTORBITS/) isiso=9
pascal@21791 353 if (isiso == 9) { # ISO9660.LST
pascal@23996 354 if (/dx,/) next
pascal@21791 355 sub(/mov ax,/,"les ax,d")
pascal@21791 356 if (/^ call/) {
pascal@21791 357 print " extrn N_LXLSH@ES:near"
pascal@21791 358 sub(/N_LXLSH@/,"N_LXLSH@ES")
pascal@21791 359 isiso=0
pascal@21791 360 }
pascal@21791 361 }
pascal@21791 362 if (/filesize =/) isiso=8
pascal@21791 363 if (isiso == 8) { # ISO9660.LST
pascal@21791 364 if (/ax,/) next
pascal@21791 365 sub(/mov dx,/,"les dx,d")
pascal@21791 366 sub(/,ax/,",es")
pascal@21791 367 if (/filemod/) isiso=0
pascal@21791 368 }
pascal@21754 369 if (/entrysize =/) isiso=5
pascal@21754 370 if (isiso == 5) { # ISO9660.LST
pascal@21754 371 if (/ax,ax/) next
pascal@21754 372 sub(/ax/,"cx")
pascal@21754 373 sub(/je/,"jcxz")
pascal@23996 374 if (/jcxz/) {
pascal@23996 375 hold=0
pascal@23996 376 print s
pascal@23996 377 sub(/@1@114/,"@1@394")
pascal@23996 378 print
pascal@23996 379 print " mov word ptr [si+10],dx"
pascal@23996 380 $0=" mov word ptr [si+8],ax"
pascal@23996 381 }
pascal@21754 382 if (/return/) isiso=0
pascal@21754 383 }
pascal@21754 384 if (/do s\+\+; while/) isiso=3
pascal@23996 385 if (isiso == 3) { # ISO9660.LST
pascal@21754 386 sub(/cmp byte ptr \[.i\]/,"sub al")
pascal@21754 387 if (/inc /) { r=$2; print; next }
pascal@21754 388 if (/al,0/) print " mov al,[" r "]"
pascal@23996 389 if (/al,byte ptr/) next
pascal@21754 390 if (/byte ptr \[.*\],0/) next
pascal@23996 391 }
pascal@23996 392 if (/ptr .isoreaddir/) isiso=1
pascal@23996 393 if (isiso == 1) { # ISO9660.LST
pascal@23996 394 if (/n = name;/) {
pascal@23996 395 isiso=19
pascal@23996 396 print " xchg ax,cx"
pascal@23996 397 print " xchg cl,byte ptr [di] ; c"
pascal@21791 398 }
pascal@23996 399 if (/short @2@366/) sub(/jne/,"jnc")
pascal@23996 400 if (/short @2@282/) sub(/je/,"jc")
pascal@23996 401 if (/short @2@562/) sub(/@2@562/,"returnNotC")
pascal@23996 402 if (/short @2@534/) { print; $0=" inc cx" }
pascal@23996 403 if (/ax,word ptr \[si\+4\]/) $0=" xchg ax,bx ; " $0
pascal@23996 404 if (/\[di\],al/) next
pascal@23996 405 if (/@2@310/) next
pascal@23996 406 if (/ax,-1/) next
pascal@23996 407 if (/inc di/ || /@@0/) next
pascal@23996 408 if (/@2@142$/) { print " inc di"; sub(/jmp/,"loop") }
pascal@21735 409 }
pascal@23996 410 if (/i\+36\]/) next
pascal@23999 411 sub(/di,offset DGROUP:_isostate/,"di,si")
pascal@21791 412 } # file == "iso9660.cpp"
pascal@21729 413 if (wascall) {
pascal@21729 414 if (rcall != "") {
pascal@21729 415 if (/,ax$/) print " mov " rcall ",ax"
pascal@21729 416 else print " xchg ax," rcall
pascal@21729 417 wascall=0
pascal@21729 418 }
pascal@21729 419 else if (/^ mov .i,ax$/) {
pascal@21729 420 split($2,y,",")
pascal@21729 421 rcall=y[1]
pascal@21729 422 next
pascal@21729 423 }
pascal@21729 424 else wascall=0
pascal@21729 425 }
pascal@21729 426 if (/^ call /) { wascall=1; rcall="" }
pascal@20458 427 if (hold == 0) {
pascal@20458 428 s=$0
pascal@20534 429 if (/^ mov .[ix],bx$/ || /^ mov .[ix],.i$/) {
pascal@20543 430 r=$2; kept=0
pascal@20458 431 hold=1; split($2,regs,","); next
pascal@20458 432 }
pascal@21729 433 if (/^ inc e?.[ixhl]/ || /^ dec e?.[ixhl]/) {
pascal@20458 434 hold=2; r=$2; next
pascal@20458 435 }
pascal@20458 436 if (/^ mov [abcds][ix],/ && ! /,.s/) {
pascal@20458 437 hold=3; split($2,regs,","); next
pascal@20458 438 }
pascal@20458 439 if (/^ movzx eax,ax$/) { hold=4; next }
pascal@20544 440 if (/^ cmp word ptr/ || /^ cmp [bcd]x,/) {
pascal@20543 441 split($0,regs,",")
pascal@20543 442 if (isnum(regs[2]) && regs[2] != 0 &&
pascal@20543 443 (regs[2] % 256) == 0) {
pascal@20549 444 hold=5; next
pascal@20543 445 }
pascal@20543 446 }
pascal@20630 447 if (/^ mov ax,cs$/) { hold=6; kept=0; next }
pascal@20630 448 if (/^ mov cl,4$/) { hold=7; next }
pascal@20630 449 if (/^ cmp word ptr DGROUP:.*,0$/) {
pascal@20630 450 hold=8; split($2,regs,","); next
pascal@20630 451 }
pascal@20634 452 if (/^ cbw/) { hold=11; kept=0; next }
pascal@20634 453 if (/^ add [abcds][ix],2$/) {
pascal@20634 454 split($2,regs,","); hold=12; next
pascal@20634 455 }
pascal@20634 456 if (/^ sub [abcds][ix],2$/) {
pascal@20634 457 split($2,regs,","); hold=13; next
pascal@20634 458 }
pascal@21569 459 if (/^ push dx$/) {
pascal@21569 460 hold=14; next;
pascal@21569 461 }
pascal@20458 462 }
pascal@20458 463 else if (hold == 1) {
pascal@20543 464 if (/^ ;/) { line[kept++]=$0; next }
pascal@20458 465 hold=0; split($2,args,","); op=""
pascal@20458 466 if ($1 == "add") op="+"
pascal@20458 467 if ($1 == "sub") op="-"
pascal@20751 468 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 469 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20543 470 if (op != "" && regs[1] == args[1]) {
pascal@20543 471 if (isnum(args[2])) {
pascal@20630 472 for (i = kept++; i > 0; i--) line[i] = line[i-1]
pascal@20630 473 line[0] = "\tlea\t" regs[1] ",[" regs[2] op args[2] "]"
pascal@22288 474 sub(/\+-/,"-",line[0])
pascal@20630 475 hold=10; next
pascal@20543 476 }
pascal@20543 477 line[kept++]=$0
pascal@20543 478 hold=1
pascal@20458 479 next
pascal@20458 480 }
pascal@20520 481 if (/^ pop [ds]i/ && regs[2] ~ /^[ds]i$/) {
pascal@20520 482 print " xchg " r
pascal@20520 483 }
pascal@20543 484 else print s
pascal@20543 485 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20458 486 }
pascal@20458 487 else if (hold == 2) {
pascal@21729 488 split($0,args,",")
pascal@21729 489 if (/^ mov / && r == args[2]) { print s; s=$0; next }
pascal@21729 490 split($2,args,",")
pascal@21729 491 hold=0; print s
pascal@20458 492 if ($1 == "or" && r == args[1] && r == args[2]) next # don't clear C ...
pascal@20458 493 }
pascal@20458 494 else if (hold == 3) {
pascal@20458 495 hold=0
pascal@21576 496 if (/^ call / && regs[2] == "ax") s=" xchg ax," regs[1]
pascal@20542 497 if (/^ add [abcds][ix],/) {
pascal@20458 498 split($2,regs2,",")
pascal@20458 499 if (regs[1] == regs2[1] && (regs2[2] == "offset" || isnum(regs2[2]))) {
pascal@20549 500 t=$0; sub(/mov/,$1,s); sub(/add/,"mov",t)
pascal@20458 501 print t; print s; next
pascal@20458 502 }
pascal@20458 503 }
pascal@20458 504 print s
pascal@20458 505 }
pascal@20458 506 else if (hold == 4) {
pascal@20458 507 hold=0
pascal@20458 508 if (/^ push eax$/) {
pascal@20458 509 print " push 0"; print " push ax"; next
pascal@20458 510 } else { print s }
pascal@20458 511 }
pascal@20543 512 else if (hold == 5) {
pascal@20543 513 hold=0
pascal@20543 514 if ($1 == "jae" || $1 == "jb") {
pascal@20544 515 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 516 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20543 517 s = s "/256"
pascal@20543 518 }
pascal@20543 519 print s
pascal@20543 520 }
pascal@20630 521 else if (hold == 6) {
pascal@20630 522 if (($1 == "and" || $1 == "add") && $2 ~ /^ax,/) {
pascal@20630 523 line[kept++]=$0
pascal@20630 524 next
pascal@20630 525 }
pascal@20630 526 p=$0
pascal@20630 527 if (/^ movzx eax,ax$/) {
pascal@20630 528 s=" mov eax,cs"; p=""
pascal@20630 529 }
pascal@20630 530 print s
pascal@20630 531 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20630 532 if (p != "") print p
pascal@20630 533 hold=0; next
pascal@20630 534 }
pascal@20630 535 else if (hold == 7) {
pascal@20458 536 hold=0
pascal@20520 537 if (/^ call near ptr N_LXURSH@$/) {
pascal@20520 538 print " extrn N_LXURSH@4:near"
pascal@20520 539 print " call near ptr N_LXURSH@4"
pascal@20520 540 next
pascal@20520 541 }
pascal@20528 542 if (/^ call near ptr N_LXLSH@$/) {
pascal@20528 543 print " extrn N_LXLSH@4:near"
pascal@20528 544 print " call near ptr N_LXLSH@4"
pascal@20528 545 next
pascal@20528 546 }
pascal@20520 547 print s
pascal@20458 548 }
pascal@20630 549 else if (hold == 8) {
pascal@20630 550 if ($1 == "je" || $1 == "jne") { p=$0; hold=9; next }
pascal@20630 551 hold=0
pascal@20630 552 print s
pascal@20630 553 }
pascal@20630 554 else if (hold == 9) {
pascal@20630 555 hold=0; split($2,args,",")
pascal@20630 556 if (/^ mov ax,/ && args[2] == regs[1]) {
pascal@20630 557 print; print " or ax,ax"; print p; next
pascal@20630 558 }
pascal@20630 559 print s; print p;
pascal@20630 560 }
pascal@20630 561 else if (hold == 10) {
pascal@20751 562 split($2,args,","); op=""
pascal@20751 563 if ($1 == "add") op="+"
pascal@20751 564 if ($1 == "sub") op="-"
pascal@20751 565 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 566 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20751 567 if (op != "" && isnum(args[2])) {
pascal@20751 568 split(line[0],reg,",")
pascal@20751 569 if (substr(reg[1],length(reg[1])-1,2) == args[1]) {
pascal@20751 570 line[0] = substr(line[0],1,length(line[0])-1) op args[2] "]"
pascal@20751 571 next
pascal@20751 572 }
pascal@20751 573 }
pascal@20630 574 hold=0
pascal@20630 575 if (/^ mov [sd]i,ax$/) {
pascal@20630 576 split($2,args,",")
pascal@20630 577 for (i = 0; i < kept; i++) {
pascal@20630 578 sub(/ax/,args[1],line[i]); print line[i]
pascal@20630 579 }
pascal@20630 580 next
pascal@20630 581 }
pascal@20630 582 for (i = 0; i < kept; i++) print line[i]
pascal@20630 583 }
pascal@20634 584 else if (hold == 11) {
pascal@20634 585 if (/^ inc ax$/ || /^ dec ax$/) {
pascal@20634 586 line[kept++]=$0; next
pascal@20634 587 }
pascal@20634 588 split($2,args,",")
pascal@20634 589 if (/^ mov cl,/) {
pascal@20634 590 split($2,args,",")
pascal@20634 591 if (args[2] >= 8) {
pascal@20634 592 line[kept++]=$0; next
pascal@20634 593 }
pascal@20634 594 }
pascal@20634 595 if (!/^ shl ax,/ || (args[2] != "cl" && args[2] < 8)) {
pascal@20634 596 print " cbw "
pascal@20634 597 }
pascal@20634 598 for (i = 0; i < kept; i++) print line[i]
pascal@20634 599 hold=kept=0
pascal@20634 600 }
pascal@20634 601 else if (hold == 12) {
pascal@20634 602 hold=0
pascal@20634 603 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 604 print " inc " regs[1]
pascal@20634 605 print " inc " regs[1]
pascal@20634 606 }
pascal@20634 607 else print " add " regs[1] ",2"
pascal@20634 608 }
pascal@20634 609 else if (hold == 13) {
pascal@20634 610 hold=0
pascal@20634 611 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 612 print " dec " regs[1]
pascal@20634 613 print " dec " regs[1]
pascal@20634 614 }
pascal@20634 615 else print " sub " regs[1] ",2"
pascal@20634 616 }
pascal@21569 617 else if (hold == 14) {
pascal@21569 618 if (/^ push ax$/) { hold++; next; }
pascal@21569 619 print " push dx";
pascal@21569 620 hold=0;
pascal@21569 621 }
pascal@21569 622 else if (hold == 15) {
pascal@21569 623 if (/^ pop eax$/) { hold++; next; }
pascal@21569 624 print " push dx";
pascal@21569 625 print " push ax";
pascal@21569 626 hold=0;
pascal@21569 627 }
pascal@21569 628 else if (hold == 16) {
pascal@21569 629 hold=0;
pascal@21569 630 if (/^ shr eax,16$/) { print " xchg ax,dx"; next; }
pascal@21569 631 print " push dx";
pascal@21569 632 print " push ax";
pascal@21569 633 print " pop eax";
pascal@21569 634 }
pascal@21569 635 else if (hold == 17) {
pascal@21569 636 hold=0;
pascal@21569 637 if (/^ cmp ax,-1$/) { print " inc ax"; next; }
pascal@21569 638 }
pascal@21576 639 if (/^ call near ptr @fileexist\$/ || # return boolean :
pascal@21576 640 /^ call near ptr @isoreaddir\$/ || # 0=true, -1=false
pascal@21628 641 /^ call near ptr @isoreset\$/ ||
pascal@21628 642 /^ call near ptr @isoopen\$/ ||
pascal@21628 643 /^ call near ptr @isoreadsector\$/ ||
pascal@21628 644 /^ call near ptr @strhead\$/ ||
pascal@23984 645 /^ call near ptr @strcmp\$/ ||
pascal@21576 646 /^ call near ptr @argstr\$/ ||
pascal@21576 647 /^ call near ptr @argnum\$/) { print; hold=17; next; }
pascal@20458 648 s=$0
pascal@20458 649 # These optimisation may break ZF or CF
pascal@20485 650 if (/^ sub sp,2$/) { print " push ax"; next }
pascal@20485 651 if (/^ sub sp,4$/) { print " push ax"; print " push ax"; next }
pascal@20485 652 if (/^ add sp,4$/) { print " pop cx"; print " pop cx"; next }
pascal@20458 653 if (/^ mov d*word ptr .*,0$/ || /^ mov dword ptr .*,large 0$/) {
pascal@20458 654 sub(/mov/,"and",s); print s; next # slower
pascal@20458 655 }
pascal@20458 656 if (/^ mov d*word ptr .*,-1$/ || /^ mov dword ptr .*,large -1$/) {
pascal@20458 657 sub(/mov/,"or",s); print s; next # slower
pascal@20458 658 }
pascal@20458 659 if (/^ or .*,0$/ || /^ and .*,-1$/) next
pascal@20458 660 if (/^ or [abcd]x,/) {
pascal@20458 661 split($2,args,",")
pascal@20458 662 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 663 print " or " substr(args[1],1,1) "l," args[2]; next
pascal@20458 664 }
pascal@20458 665 }
pascal@20458 666 if (/^ and [abcd]x,/) {
pascal@20458 667 split($2,args,",")
pascal@20459 668 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 669 print " and " substr(args[1],1,1) "l," args[2]; next
pascal@20458 670 }
pascal@20458 671 }
pascal@20458 672 if (/^ or e[abcd]x,/) {
pascal@20458 673 split($2,args,",")
pascal@20458 674 if (args[2] == "large") { args[2] = $3 }
pascal@20458 675 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 676 print " or " substr(args[1],2,1) "l," args[2]; next
pascal@20458 677 }
pascal@20458 678 }
pascal@20458 679 if (/^ and e[abcd]x,/) {
pascal@20458 680 split($2,args,",")
pascal@20458 681 if (args[2] == "large") { args[2] = $3 }
pascal@20459 682 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 683 print " and " substr(args[1],2,1) "l," args[2]; next
pascal@20458 684 }
pascal@20458 685 }
pascal@20458 686 if (/^ or e[abcds][ix],/) {
pascal@20458 687 split($2,args,",")
pascal@20458 688 if (args[2] == "large") { args[2] = $3 }
pascal@20458 689 if (isnum(args[2]) && args[2] >= 0 && args[2] < 65536) {
pascal@20458 690 print " or " substr(args[1],2) "," args[2]; next
pascal@20458 691 }
pascal@20458 692 }
pascal@20458 693 if (/^ and e[abcds][ix],/) {
pascal@20458 694 split($2,args,",")
pascal@20458 695 if (args[2] == "large") { args[2] = $3 }
pascal@20459 696 if (isnum(args[2]) && args[2] >= -65536 && args[2] < 0) {
pascal@20458 697 print " and " substr(args[1],2) "," args[2]; next
pascal@20458 698 }
pascal@20458 699 }
pascal@20543 700 if (/^ add word ptr/ || /^ sub word ptr/ ||
pascal@20544 701 /^ add [bcd]x,/ || /^ sub [bcd]x,/) {
pascal@20542 702 split($0,args,",")
pascal@20542 703 if (isnum(args[2]) && (args[2] % 256 == 0)) {
pascal@20544 704 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 705 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20542 706 print s "/256"; next
pascal@20542 707 }
pascal@20542 708 }
pascal@20546 709 if (/^ add dword ptr/ || /^ sub dword ptr/) {
pascal@20458 710 split($0,args,",")
pascal@20543 711 if (args[2] == "large") { args[2] = $3 }
pascal@20458 712 if (isnum(args[2])) {
pascal@20546 713 if (args[2] % 16777216 == 0) {
pascal@20546 714 sub(/dword/,"byte",s)
pascal@20543 715 sub(/\],/,"+3],",s) || sub(/,/,"+3,",s)
pascal@20458 716 print s "/16777216"; next
pascal@20458 717 }
pascal@20458 718 if (args[2] % 65536 == 0) {
pascal@20546 719 sub(/dword/,"word",s)
pascal@20543 720 sub(/\],/,"+2],",s) || sub(/,/,"+2,",s)
pascal@20458 721 print s "/65536"; next
pascal@20458 722 }
pascal@20458 723 }
pascal@20458 724 }
pascal@20458 725 if (/^ mov e.x,/) {
pascal@20458 726 split($2,args,",")
pascal@20458 727 r=args[1]
pascal@20458 728 if (args[2] == "large") { args[2] = $3 }
pascal@20458 729 if (isnum(args[2]) && args[2] % 65536 == args[2]) {
pascal@20458 730 if (args[2] % 256 == args[2] || args[2] % 256 == 0) {
pascal@20458 731 print " xor " r "," r
pascal@20458 732 if (args[2] == 0) next
pascal@20458 733 x=" mov " substr(r,2,1)
pascal@20458 734 if (args[2] % 256 == 0) {
pascal@20458 735 print x "h," args[2] "/256"
pascal@20458 736 }
pascal@20458 737 else { print x "l," args[2] }
pascal@20458 738 next
pascal@20458 739 }
pascal@20458 740 }
pascal@20458 741 }
pascal@21576 742 if (afterjmp) print ";" $0
pascal@21576 743 else print
pascal@21754 744 if (/^ jmp / || /^ call near ptr _boot_kernel/ ||
pascal@23992 745 /^ call near ptr @die\$qpxzc/ ||
pascal@23992 746 /^ call near ptr @exit\$qv/) afterjmp=1
pascal@20458 747 }