wok annotate linld/stuff/src/pipehole.awk @ rev 23999

syslinux/iso2exe: read isolinux.cfg
author Pascal Bellard <pascal.bellard@slitaz.org>
date Tue Jan 12 07:47:12 2021 +0000 (2021-01-12)
parents a946c1651082
children bc4b94310a29
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@21984 12 if (/add si,2/) $0=" lodsw ; " $0
pascal@21984 13 if (/add di,2/) $0=" scasw ; " $0
pascal@21984 14 if (/bx,offset DGROUP:s@\+26/) sub(/mov/,";mov")
pascal@23994 15 if (/bx,si/ || /\[bp-2\]/) next
pascal@23994 16 sub(/\[bx\],0/,"[si],0")
pascal@21984 17 if (islinld==1) {
pascal@21984 18 print "; " $0
pascal@21984 19 if (!/word ptr/) next
pascal@21984 20 islinld=0
pascal@21984 21 sub(/,word.*/,",di ; argv")
pascal@21984 22 if (/di,di/) { print "; " $0; next }
pascal@21984 23 }
pascal@21984 24 if (/^_main proc/) islinld=1
pascal@21984 25 if (/== 0x662F/) islinld=2
pascal@21984 26 if (islinld==2) {
pascal@21984 27 if (/cpuhaslm/) islinld=0
pascal@23992 28 if (/bx,word/) { print "; " $0; next }
pascal@21984 29 }
pascal@21984 30 if (/image\|initrd/) islinld=3
pascal@21984 31 if (islinld==3) {
pascal@23992 32 if (/bx,word ptr/) { print "; " $0; next }
pascal@21984 33 }
pascal@21984 34 if (/fileexist\$qpxzc/) islinld=4
pascal@21984 35 if (islinld==4) {
pascal@23993 36 if (/ax,-1/) {
pascal@23993 37 print " inc ax"
pascal@23993 38 print " mov ax,word ptr [si]"
pascal@23993 39 next
pascal@23993 40 }
pascal@23993 41 if (/ax,word ptr/) next
pascal@21984 42 if (/\[si\]$/) { islinld=0; print "; " $0; next }
pascal@21984 43 }
pascal@23992 44 if (/buf_cmdline\+1/) {
pascal@23992 45 islinld=5
pascal@23996 46 print " mov bx,offset DGROUP:_buf_cmdline+1"
pascal@23996 47 sub(/offset DGROUP:_buf_cmdline\+1/,"bx")
pascal@23992 48 }
pascal@23804 49 if (islinld==5) {
pascal@23996 50 if (/bx,offset DGROUP:_buf_cmdline/) $0=" dec bx"
pascal@23993 51 if (/ax,word ptr/) next
pascal@23992 52 if (/call/) islinld=0
pascal@23804 53 }
pascal@23996 54 if (/bx,word ptr DGROUP:_cmdstr\+6/) next
pascal@23996 55 if (/_cmdstr\+6,0/) {
pascal@23996 56 print " mov bx,word ptr [di+6]"
pascal@23996 57 $0=" or bx,bx"
pascal@23996 58 }
pascal@21984 59 } # file == "linld.cpp"
pascal@21791 60 if (file == "himem.cpp") {
pascal@23989 61 if (/sp,bp/ || /pop bp/) next
pascal@21984 62 if (/void load_image/) ishimem=1
pascal@21791 63 if (ishimem == 1 && is386 == 0) {
pascal@21791 64 if (/si\+8\]$/ || /si\+4\]$/ || /si\+16\]$/) next
pascal@21791 65 if (/si\+6\]$/ || /si\+2\]$/ || /si\+14\]$/) sub(/mov dx,/,"les dx,d")
pascal@23996 66 if (/si\+12\],ax/ || /si\+16\],ax/ || /DGROUP:_himem_buf\+2,ax/) sub(/,ax/,",es")
pascal@23996 67 if (/dx,dword ptr \[si\+14\]/ || /DGROUP:_himem_buf,dx/) sub(/dx/,"ax")
pascal@21984 68 }
pascal@21984 69 if (ishimem == 1) {
pascal@21984 70 if (/do \{/) ishimem=2
pascal@23991 71 if (/bx,si/ || /push bp/ || /bp,sp/ || /push di/ || /push si/) next
pascal@23996 72 if (/sp,2/ || /bp\+4/) next
pascal@21984 73 }
pascal@21984 74 if (ishimem == 2) {
pascal@21984 75 if (/movzx/) print " cwde"
pascal@23996 76 if (/bp-2/ || /di,ax/ || /bx,di/ || /bx,si/) next
pascal@21984 77 if (/storepage.bufv/) {
pascal@21984 78 print " inc ax"
pascal@21984 79 print " push ax"
pascal@21984 80 }
pascal@21984 81 if (/buf \+= size;/) {
pascal@21984 82 print " pop ax"
pascal@21984 83 }
pascal@23996 84 if (/i\+12/) ishimem=20
pascal@23996 85 }
pascal@23996 86 if (ishimem == 20) {
pascal@23996 87 if (/stc/ || /loadfail/) next
pascal@23996 88 if (/je/) {
pascal@23996 89 print " extrn jmploadfailure"
pascal@23996 90 $0=" jne short jmploadfailure"
pascal@23996 91 }
pascal@23989 92 if (/endp/) ishimem=0
pascal@21791 93 }
pascal@23992 94 if (/@memcpy_image\$qp11image_himem/) next
pascal@23992 95 if (/far last_ditch/) {
pascal@23992 96 print " extrn memcpy_image_kernel:near"
pascal@23992 97 print " extrn memcpy_image_initrd:near"
pascal@23992 98 ishimem=3
pascal@23992 99 cpy_initrd=0
pascal@23992 100 }
pascal@23992 101 if (ishimem == 3) {
pascal@23996 102 sub(/DGROUP:_imgs\+4,/,"[si+4],")
pascal@23996 103 if (/bx,di/ || /di,ax/ || /bx,30/) next
pascal@23992 104 if (/mov bx,si/) {
pascal@23992 105 if (cpy_initrd==0) sub(/mov bx,si/, "call memcpy_image_kernel")
pascal@23992 106 else sub(/mov bx,si/, "call memcpy_image_initrd")
pascal@23992 107 cpy_initrd=1-cpy_initrd
pascal@23992 108 }
pascal@23996 109 sub(/lea bx,\[si\+30\]/, "call memcpy_image_initrd")
pascal@23992 110 }
pascal@23992 111 if (/m = pm2initrd/) ishimem=4
pascal@23992 112 if (ishimem == 4) {
pascal@23996 113 if (/si,30/ || /bx,di/ || /di,ax/) next
pascal@23996 114 sub(/\[si/,"[si+30")
pascal@23992 115 sub(/mov bx,si/, "call memcpy_image_initrd")
pascal@23992 116 }
pascal@21791 117 } # file == "himem.cpp"
pascal@21791 118 if (file == "load.cpp") {
pascal@23996 119 if (isload != 3 && isload != 6) { # LOAD.LST
pascal@23996 120 if (/,si/ || /si,/ || /\[si/) sub(/si/,"di")
pascal@23996 121 else if (/,di/ || /di,/ || /\[di/) sub(/di/,"si")
pascal@23996 122 }
pascal@23996 123 if (/moverm\(/) isload=16
pascal@23996 124 if (isload != 16 && /bx,si/) next
pascal@23996 125 if (/@moverm/) isload=0
pascal@23992 126 if (/readrm\(m, 0x200/) isload=15
pascal@23992 127 if (isload == 15) { # LOAD.LST
pascal@23996 128 if (/bx,si/) next
pascal@23992 129 if (/call/) isload=0
pascal@23992 130 }
pascal@23989 131 if (/load_image\(/) {
pascal@23989 132 if (isload == 3) isload=13
pascal@23989 133 else isload=14
pascal@23989 134 }
pascal@23989 135 if (isload == 14) { # LOAD.LST
pascal@23996 136 if (/call/) $0=" jmp short load_imagez"
pascal@23989 137 if (/ret/) isload=0
pascal@23989 138 if (/pop/ || /ret/ || /push/) next
pascal@23989 139 }
pascal@23989 140 if (isload == 13) { # LOAD.LST
pascal@23991 141 if (/pop/) isload=3
pascal@23991 142 if (/push/ || /call/ || /pop/) next
pascal@23989 143 }
pascal@22152 144 if (/i\+21\],513$/) isload=11
pascal@21984 145 if (isload == 12) { # LOAD.LST
pascal@21984 146 if (/cmp/) next
pascal@21984 147 if (/jb/) isload=0
pascal@21984 148 sub(/jb/,"jcxz")
pascal@21984 149 }
pascal@21984 150 if (isload == 11) { # LOAD.LST
pascal@21984 151 if (/cmp/) {
pascal@21984 152 print " mov cx,513"
pascal@22152 153 sub(/cmp /,"sub cx,")
pascal@22152 154 sub(/,513/,"")
pascal@21984 155 }
pascal@21984 156 if (/jb/) isload=12
pascal@21984 157 sub(/jb/,"ja")
pascal@21984 158 }
pascal@22170 159 sub(/_imgs\+65534/,"_imgs-2")
pascal@21791 160 if (/setup_sects == 0/) isload=9
pascal@21791 161 if (isload == 9) { # LOAD.LST
pascal@23999 162 sub(/,0/,",al ; worst case 2k boundary (iso)")
pascal@21791 163 if (/jne/) isload=0
pascal@21791 164 }
pascal@21757 165 if (/cmd_line_ptr =/ && is386 == 0) isload=7
pascal@21757 166 if (isload == 7) { # LOAD.LST
pascal@22181 167 if (/add/ || /xor/ || /extrn/ || /N_LXLSH@/ || /cl,4/ || /,ax/) next
pascal@22170 168 if (/enable A20 if needed/) { print nextinst; isload=0 }
pascal@22152 169 if (/i-463/) $0=" mov bx,-463"
pascal@22170 170 if (/i-465/) {
pascal@22170 171 sub(/465/,"2"); sub(/\[/,"[bx+")
pascal@22170 172 nextinst=$0; sub(/-2\],-23745/,"],8000h",nextinst)
pascal@22170 173 }
pascal@21757 174 if (/,dx/) {
pascal@21757 175 print " mov cl,12"
pascal@21757 176 print " shr ax,cl"
pascal@22181 177 print " mov bx,55"
pascal@21757 178 sub(/dx/,"ax")
pascal@21757 179 }
pascal@21757 180 }
pascal@23992 181 if (/pm_low == 0/) {
pascal@23991 182 print " push di"
pascal@23996 183 print " push si"
pascal@23991 184 isload=6
pascal@23991 185 }
pascal@21757 186 if (isload == 6) { # LOAD.LST
pascal@23991 187 if (/si\+2/) {
pascal@23991 188 print " cmpsw"
pascal@23991 189 next
pascal@23991 190 }
pascal@23989 191 if (/les/) sub(/bx,/,"di,")
pascal@23991 192 if (/bx\+4/ || /es:/ || /call/ || /pop/ || /ret/) next
pascal@23989 193 if (/si\+6/) {
pascal@23989 194 print " movsw"
pascal@23989 195 print " movsw"
pascal@23989 196 print " movsw"
pascal@23989 197 print " movsw"
pascal@23996 198 print " pop si"
pascal@23991 199 print "load_imagez:"
pascal@21757 200 next
pascal@21757 201 }
pascal@21757 202 }
pascal@21757 203 if (isload == 5) { # LOAD.LST
pascal@21757 204 sub(/ax,/,"bx,")
pascal@23996 205 if (/@puts\$qpxzc/) isload=0
pascal@21757 206 if (/mov bx,ax/) next
pascal@23996 207 sub(/,word ptr \[di\+29\]/,",cx")
pascal@21757 208 }
pascal@23996 209 if (/_cmdnum\+14/ && is386 == 0) isload=4
pascal@22180 210 if (isload == 4) { # LOAD.LST
pascal@23996 211 if (/_cmdnum\+14/) next
pascal@23996 212 if (/_cmdnum\+12$/) {
pascal@23996 213 $0=" les dx,dword ptr [bx+12]"
pascal@21757 214 }
pascal@21791 215 sub(/,ax/,",es")
pascal@22181 216 if (/add ax,word ptr/) $0=" add ax,cx"
pascal@22181 217 if (/i\+29\],0/) {
pascal@22181 218 sub(/,0$/,"")
pascal@22181 219 sub(/cmp /,"mov cx,")
pascal@22181 220 }
pascal@22181 221 sub(/je/,"jcxz")
pascal@23996 222 if (/@strcpy/) isload=0
pascal@23992 223 if (/\+0x200/) isload=5
pascal@21757 224 }
pascal@23996 225 if (/void load_initrd\(\)/) { isload=3; isload2=0 }
pascal@21754 226 if (isload == 3) { # LOAD.LST
pascal@23996 227 if (/cmdstr\+4,0/) {
pascal@23996 228 isload2++
pascal@23996 229 print " mov ax,word ptr DGROUP:_cmdstr+4"
pascal@23996 230 $0=" or ax,ax"
pascal@23996 231 }
pascal@23996 232 if (isload2 && /DGROUP:_cmdstr\+4/) $0=";" $0
pascal@23994 233 if (/je short @2@.*/) sub(/@2@.*/,"load_initrd_ret")
pascal@23992 234 if (/mov ax,word ptr \[si\]/) $0=" lodsw"
pascal@23991 235 if( /jmp/) {
pascal@23991 236 print "load_initrd_ret:"
pascal@23991 237 print " pop si"
pascal@23991 238 print " ret"
pascal@23991 239 next
pascal@23991 240 }
pascal@23996 241 if (/@loadfailure/) {
pascal@23996 242 print " global jmploadfailure:near"
pascal@23996 243 print "jmploadfailure:"
pascal@23996 244 }
pascal@21754 245 sub(/\[di/,"[bx")
pascal@23992 246 sub(/di,/,"bx,")
pascal@21754 247 }
pascal@23996 248 if (/mode = vid_mode/) { isload=2; print " mov bx,offset _cmdnum" }
pascal@21750 249 if (isload == 2) { # LOAD.LST
pascal@23996 250 if (/DGROUP:_cmdnum/) { sub(/DGROUP:_cmdnum/,"[bx"); $0=$0 "]"}
pascal@21750 251 sub(/,0/,""); sub(/cmp /,"mov cx,")
pascal@21750 252 sub(/je/,"jcxz")
pascal@21750 253 if (/ax,word/) next
pascal@21750 254 sub(/,ax/,",cx")
pascal@23992 255 if (/starting linux 1\.3\.73/) isload=0
pascal@21750 256 }
pascal@23996 257 if (/_rm_size=0x200/ || /heap_top = _rm_buf/) isload=1
pascal@21750 258 if (isload == 1) { # LOAD.LST
pascal@21791 259 if (/ptr .die\$qpxzc/) $0="@die@:\n" $0
pascal@21729 260 if (/mov al,byte ptr/ && is386) {
pascal@22152 261 sub(/mov al/,"movzx eax")
pascal@21729 262 }
pascal@21791 263 if (is386 == 0) {
pascal@23999 264 if (/m->size -= _rm_size/) print " cwd ; do not trust rewind result (iso case)"
pascal@21791 265 sub(/,0$/,",dx")
pascal@21791 266 }
pascal@21729 267 if (/ax,word ptr/) next
pascal@21729 268 if (/^ call/) isload=0
pascal@21729 269 }
pascal@21791 270 } # file == "load.cpp"
pascal@21791 271 if (file == "iso9660.cpp") {
pascal@23996 272 if (/ptr \[si\+10\],dx/) next
pascal@23996 273 if (/ptr \[si\+8\],ax/) next
pascal@23996 274 if (/si\+32/) next
pascal@23996 275 if (/add word ptr \[si\],ax/) $0=" add word ptr [si],cx"
pascal@23996 276 if (/ax,word ptr \[si\+24\]/) sub(/mov ax,/,"les ax,d")
pascal@23996 277 if (/ax,word ptr \[si\+26\]/) next
pascal@23996 278 if (/word ptr \[si\+29\],ax/) sub(/ax/,"es")
pascal@23996 279 if (/\[si\],-1/) $0=" not word ptr [si]"
pascal@23996 280 sub(/di,word ptr DGROUP:_isostate\+2/,"di,word ptr [si+2]")
pascal@23996 281 if (isiso == 19) { # ISO9660.LST
pascal@23996 282 if (/short @2@282/) $0=" jc restoreC"
pascal@23996 283 if (/bp-2/ || /si\+34/ || /ax,dx/ || /cmp ax,-1/) next
pascal@23996 284 sub(/dx,/,"bx,")
pascal@23996 285 if (/short @2@282/) sub(/je/,"jnc")
pascal@23996 286 if (/\[si\+37\],0/) sub(/,0/,",ch")
pascal@23996 287 if (/@strcmp\$qpxzct1/) {
pascal@23996 288 print
pascal@23996 289 print "restoreC:"
pascal@23996 290 $0=" mov byte ptr [di],cl ; c"
pascal@23996 291 isiso=1
pascal@23996 292 }
pascal@23996 293 }
pascal@23996 294 if (/ax,-8/) { isiso=18; next }
pascal@23996 295 if (isiso == 18) { # ISO9660.LST
pascal@23996 296 if (/ax,ax/) { isiso=0;next }
pascal@23996 297 sub(/mov/,"sub")
pascal@23996 298 sub(/,ax/,",8")
pascal@23996 299 }
pascal@23996 300 if (isiso == 17) { # ISO9660.LST
pascal@23996 301 if (/inc di/) $0="; " $0
pascal@23996 302 if (/_isostate\+205/) {
pascal@23996 303 print
pascal@23996 304 $0=" jmp setdirofsnsz"
pascal@23996 305 }
pascal@23996 306 else sub(/ax/,"bx")
pascal@23996 307 if (/si\+24/) isiso=0
pascal@23996 308 if (/,bx/) next
pascal@23996 309 if (/isoreadrootsector/) {
pascal@23996 310 print
pascal@23999 311 print " xor word ptr [si+39],17475 ; clear C"
pascal@23999 312 $0=" jne returnNotC"
pascal@23996 313 }
pascal@23996 314 }
pascal@23996 315 if (/cpytodirpage.x->dirpage/) isiso=16
pascal@23996 316 if (isiso == 16) { # ISO9660.LST
pascal@23996 317 if (/filesize2dirsize/) {
pascal@23996 318 print " mov bx,word ptr [si+9]"
pascal@23996 319 print " mov ax,word ptr [si+13]"
pascal@23996 320 print "setdirofsnsz:"
pascal@23996 321 print " mov word ptr [si+26],bx"
pascal@23996 322 }
pascal@23996 323 if (/ax,/ || /si\+13/ || /si\+26/) next
pascal@23996 324 if (/si\+24/) isiso=1
pascal@23996 325 }
pascal@23996 326 if (/found:/) isiso=15
pascal@23996 327 if (/short @1@394/) sub(/@1@394/,"@1@422")
pascal@23996 328 if (isiso != 15 && /si,offset DGROUP:_isostate/) $0=";" $0
pascal@23996 329 if (isiso == 15) { # ISO9660.LST
pascal@23996 330 if (/xor/) {
pascal@23996 331 print "returnNotC:"
pascal@23996 332 print " cmc"
pascal@23996 333 print "returnC:"
pascal@23996 334 print "@1@422:"
pascal@23996 335 print " sbb ax,ax"
pascal@23996 336 print "return:"
pascal@23996 337 next
pascal@23996 338 }
pascal@23996 339 if (/@1@422:/ || /bp$/ || /bp,sp/ || /sp,2/) next
pascal@23996 340 if (/\[di\],47/) isiso=17
pascal@23996 341 }
pascal@23996 342 if (/short @1@142/) { isiso=14; next }
pascal@23989 343 if (isiso == 14) { # ISO9660.LST
pascal@23996 344 if (/ax,-1/) next
pascal@23996 345 if (/jmp @1@422/) sub(/jmp/,"jb")
pascal@23989 346 }
pascal@23988 347 if (/p = x->buffer \+ 34/) isiso=13
pascal@23988 348 if (isiso == 13) { # ISO9660.LST
pascal@23988 349 if (/di,si/) $0=" xchg ax,bx"
pascal@23996 350 if (/di,ax/) $0=" lea di,[si+bx+72]"
pascal@23996 351 if (/di,72/) {
pascal@23988 352 isiso=0
pascal@23988 353 next
pascal@23988 354 }
pascal@23988 355 }
pascal@23870 356 if (/register len/) isiso=12
pascal@23870 357 if (isiso == 12) { # ISO9660.LST
pascal@23996 358 if (/di\+2/) sub(/al/,"bl")
pascal@23996 359 if (/cbw/) next
pascal@23996 360 sub(/dx,ax/,"bh,0")
pascal@23870 361 if (/bx,dx/) next
pascal@23870 362 sub(/i,dx/,"i,bx")
pascal@23996 363 sub(/bx\+di\],0/,"bx+di],bh")
pascal@23870 364 if (/while/) isiso=0
pascal@23870 365 }
pascal@23863 366 if (/curpos >= SECT/) isiso=10
pascal@23863 367 if (isiso == 10) { # ISO9660.LST
pascal@23863 368 if (/cmp/) {
pascal@23863 369 sub(/cmp /,"mov bx,")
pascal@23863 370 sub(/i.*/,"i]")
pascal@23863 371 print
pascal@23863 372 $0=" cmp bh,2048/256"
pascal@23863 373 }
pascal@23863 374 if (/mov/) {
pascal@23863 375 isiso=0
pascal@23863 376 next
pascal@23863 377 }
pascal@23863 378 }
pascal@21791 379 if (/<< SECTORBITS/) isiso=9
pascal@21791 380 if (isiso == 9) { # ISO9660.LST
pascal@23996 381 if (/dx,/) next
pascal@21791 382 sub(/mov ax,/,"les ax,d")
pascal@21791 383 if (/^ call/) {
pascal@21791 384 print " extrn N_LXLSH@ES:near"
pascal@21791 385 sub(/N_LXLSH@/,"N_LXLSH@ES")
pascal@21791 386 isiso=0
pascal@21791 387 }
pascal@21791 388 }
pascal@21791 389 if (/filesize =/) isiso=8
pascal@21791 390 if (isiso == 8) { # ISO9660.LST
pascal@21791 391 if (/ax,/) next
pascal@21791 392 sub(/mov dx,/,"les dx,d")
pascal@21791 393 sub(/,ax/,",es")
pascal@21791 394 if (/filemod/) isiso=0
pascal@21791 395 }
pascal@21754 396 if (/entrysize =/) isiso=5
pascal@21754 397 if (isiso == 5) { # ISO9660.LST
pascal@21754 398 if (/ax,ax/) next
pascal@21754 399 sub(/ax/,"cx")
pascal@21754 400 sub(/je/,"jcxz")
pascal@23996 401 if (/jcxz/) {
pascal@23996 402 hold=0
pascal@23996 403 print s
pascal@23996 404 sub(/@1@114/,"@1@394")
pascal@23996 405 print
pascal@23996 406 print " mov word ptr [si+10],dx"
pascal@23996 407 $0=" mov word ptr [si+8],ax"
pascal@23996 408 }
pascal@21754 409 if (/return/) isiso=0
pascal@21754 410 }
pascal@21754 411 if (/do s\+\+; while/) isiso=3
pascal@23996 412 if (isiso == 3) { # ISO9660.LST
pascal@21754 413 sub(/cmp byte ptr \[.i\]/,"sub al")
pascal@21754 414 if (/inc /) { r=$2; print; next }
pascal@21754 415 if (/al,0/) print " mov al,[" r "]"
pascal@23996 416 if (/al,byte ptr/) next
pascal@21754 417 if (/byte ptr \[.*\],0/) next
pascal@23996 418 }
pascal@23996 419 if (/ptr .isoreaddir/) isiso=1
pascal@23996 420 if (isiso == 1) { # ISO9660.LST
pascal@23996 421 if (/n = name;/) {
pascal@23996 422 isiso=19
pascal@23996 423 print " xchg ax,cx"
pascal@23996 424 print " xchg cl,byte ptr [di] ; c"
pascal@21791 425 }
pascal@23996 426 if (/short @2@366/) sub(/jne/,"jnc")
pascal@23996 427 if (/short @2@282/) sub(/je/,"jc")
pascal@23996 428 if (/short @2@562/) sub(/@2@562/,"returnNotC")
pascal@23996 429 if (/short @2@534/) { print; $0=" inc cx" }
pascal@23996 430 if (/ax,word ptr \[si\+4\]/) $0=" xchg ax,bx ; " $0
pascal@23996 431 if (/\[di\],al/) next
pascal@23996 432 if (/@2@310/) next
pascal@23996 433 if (/ax,-1/) next
pascal@23996 434 if (/inc di/ || /@@0/) next
pascal@23996 435 if (/@2@142$/) { print " inc di"; sub(/jmp/,"loop") }
pascal@21735 436 }
pascal@23996 437 if (/i\+36\]/) next
pascal@23999 438 sub(/di,offset DGROUP:_isostate/,"di,si")
pascal@21791 439 } # file == "iso9660.cpp"
pascal@21729 440 if (wascall) {
pascal@21729 441 if (rcall != "") {
pascal@21729 442 if (/,ax$/) print " mov " rcall ",ax"
pascal@21729 443 else print " xchg ax," rcall
pascal@21729 444 wascall=0
pascal@21729 445 }
pascal@21729 446 else if (/^ mov .i,ax$/) {
pascal@21729 447 split($2,y,",")
pascal@21729 448 rcall=y[1]
pascal@21729 449 next
pascal@21729 450 }
pascal@21729 451 else wascall=0
pascal@21729 452 }
pascal@21729 453 if (/^ call /) { wascall=1; rcall="" }
pascal@20458 454 if (hold == 0) {
pascal@20458 455 s=$0
pascal@20534 456 if (/^ mov .[ix],bx$/ || /^ mov .[ix],.i$/) {
pascal@20543 457 r=$2; kept=0
pascal@20458 458 hold=1; split($2,regs,","); next
pascal@20458 459 }
pascal@21729 460 if (/^ inc e?.[ixhl]/ || /^ dec e?.[ixhl]/) {
pascal@20458 461 hold=2; r=$2; next
pascal@20458 462 }
pascal@20458 463 if (/^ mov [abcds][ix],/ && ! /,.s/) {
pascal@20458 464 hold=3; split($2,regs,","); next
pascal@20458 465 }
pascal@20458 466 if (/^ movzx eax,ax$/) { hold=4; next }
pascal@20544 467 if (/^ cmp word ptr/ || /^ cmp [bcd]x,/) {
pascal@20543 468 split($0,regs,",")
pascal@20543 469 if (isnum(regs[2]) && regs[2] != 0 &&
pascal@20543 470 (regs[2] % 256) == 0) {
pascal@20549 471 hold=5; next
pascal@20543 472 }
pascal@20543 473 }
pascal@20630 474 if (/^ mov ax,cs$/) { hold=6; kept=0; next }
pascal@20630 475 if (/^ mov cl,4$/) { hold=7; next }
pascal@20630 476 if (/^ cmp word ptr DGROUP:.*,0$/) {
pascal@20630 477 hold=8; split($2,regs,","); next
pascal@20630 478 }
pascal@20634 479 if (/^ cbw/) { hold=11; kept=0; next }
pascal@20634 480 if (/^ add [abcds][ix],2$/) {
pascal@20634 481 split($2,regs,","); hold=12; next
pascal@20634 482 }
pascal@20634 483 if (/^ sub [abcds][ix],2$/) {
pascal@20634 484 split($2,regs,","); hold=13; next
pascal@20634 485 }
pascal@21569 486 if (/^ push dx$/) {
pascal@21569 487 hold=14; next;
pascal@21569 488 }
pascal@20458 489 }
pascal@20458 490 else if (hold == 1) {
pascal@20543 491 if (/^ ;/) { line[kept++]=$0; next }
pascal@20458 492 hold=0; split($2,args,","); op=""
pascal@20458 493 if ($1 == "add") op="+"
pascal@20458 494 if ($1 == "sub") op="-"
pascal@20751 495 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 496 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20543 497 if (op != "" && regs[1] == args[1]) {
pascal@20543 498 if (isnum(args[2])) {
pascal@20630 499 for (i = kept++; i > 0; i--) line[i] = line[i-1]
pascal@20630 500 line[0] = "\tlea\t" regs[1] ",[" regs[2] op args[2] "]"
pascal@22288 501 sub(/\+-/,"-",line[0])
pascal@20630 502 hold=10; next
pascal@20543 503 }
pascal@20543 504 line[kept++]=$0
pascal@20543 505 hold=1
pascal@20458 506 next
pascal@20458 507 }
pascal@20520 508 if (/^ pop [ds]i/ && regs[2] ~ /^[ds]i$/) {
pascal@20520 509 print " xchg " r
pascal@20520 510 }
pascal@20543 511 else print s
pascal@20543 512 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20458 513 }
pascal@20458 514 else if (hold == 2) {
pascal@21729 515 split($0,args,",")
pascal@21729 516 if (/^ mov / && r == args[2]) { print s; s=$0; next }
pascal@21729 517 split($2,args,",")
pascal@21729 518 hold=0; print s
pascal@20458 519 if ($1 == "or" && r == args[1] && r == args[2]) next # don't clear C ...
pascal@20458 520 }
pascal@20458 521 else if (hold == 3) {
pascal@20458 522 hold=0
pascal@21576 523 if (/^ call / && regs[2] == "ax") s=" xchg ax," regs[1]
pascal@20542 524 if (/^ add [abcds][ix],/) {
pascal@20458 525 split($2,regs2,",")
pascal@20458 526 if (regs[1] == regs2[1] && (regs2[2] == "offset" || isnum(regs2[2]))) {
pascal@20549 527 t=$0; sub(/mov/,$1,s); sub(/add/,"mov",t)
pascal@20458 528 print t; print s; next
pascal@20458 529 }
pascal@20458 530 }
pascal@20458 531 print s
pascal@20458 532 }
pascal@20458 533 else if (hold == 4) {
pascal@20458 534 hold=0
pascal@20458 535 if (/^ push eax$/) {
pascal@20458 536 print " push 0"; print " push ax"; next
pascal@20458 537 } else { print s }
pascal@20458 538 }
pascal@20543 539 else if (hold == 5) {
pascal@20543 540 hold=0
pascal@20543 541 if ($1 == "jae" || $1 == "jb") {
pascal@20544 542 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 543 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20543 544 s = s "/256"
pascal@20543 545 }
pascal@20543 546 print s
pascal@20543 547 }
pascal@20630 548 else if (hold == 6) {
pascal@20630 549 if (($1 == "and" || $1 == "add") && $2 ~ /^ax,/) {
pascal@20630 550 line[kept++]=$0
pascal@20630 551 next
pascal@20630 552 }
pascal@20630 553 p=$0
pascal@20630 554 if (/^ movzx eax,ax$/) {
pascal@20630 555 s=" mov eax,cs"; p=""
pascal@20630 556 }
pascal@20630 557 print s
pascal@20630 558 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20630 559 if (p != "") print p
pascal@20630 560 hold=0; next
pascal@20630 561 }
pascal@20630 562 else if (hold == 7) {
pascal@20458 563 hold=0
pascal@20520 564 if (/^ call near ptr N_LXURSH@$/) {
pascal@20520 565 print " extrn N_LXURSH@4:near"
pascal@20520 566 print " call near ptr N_LXURSH@4"
pascal@20520 567 next
pascal@20520 568 }
pascal@20528 569 if (/^ call near ptr N_LXLSH@$/) {
pascal@20528 570 print " extrn N_LXLSH@4:near"
pascal@20528 571 print " call near ptr N_LXLSH@4"
pascal@20528 572 next
pascal@20528 573 }
pascal@20520 574 print s
pascal@20458 575 }
pascal@20630 576 else if (hold == 8) {
pascal@20630 577 if ($1 == "je" || $1 == "jne") { p=$0; hold=9; next }
pascal@20630 578 hold=0
pascal@20630 579 print s
pascal@20630 580 }
pascal@20630 581 else if (hold == 9) {
pascal@20630 582 hold=0; split($2,args,",")
pascal@20630 583 if (/^ mov ax,/ && args[2] == regs[1]) {
pascal@20630 584 print; print " or ax,ax"; print p; next
pascal@20630 585 }
pascal@20630 586 print s; print p;
pascal@20630 587 }
pascal@20630 588 else if (hold == 10) {
pascal@20751 589 split($2,args,","); op=""
pascal@20751 590 if ($1 == "add") op="+"
pascal@20751 591 if ($1 == "sub") op="-"
pascal@20751 592 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 593 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20751 594 if (op != "" && isnum(args[2])) {
pascal@20751 595 split(line[0],reg,",")
pascal@20751 596 if (substr(reg[1],length(reg[1])-1,2) == args[1]) {
pascal@20751 597 line[0] = substr(line[0],1,length(line[0])-1) op args[2] "]"
pascal@20751 598 next
pascal@20751 599 }
pascal@20751 600 }
pascal@20630 601 hold=0
pascal@20630 602 if (/^ mov [sd]i,ax$/) {
pascal@20630 603 split($2,args,",")
pascal@20630 604 for (i = 0; i < kept; i++) {
pascal@20630 605 sub(/ax/,args[1],line[i]); print line[i]
pascal@20630 606 }
pascal@20630 607 next
pascal@20630 608 }
pascal@20630 609 for (i = 0; i < kept; i++) print line[i]
pascal@20630 610 }
pascal@20634 611 else if (hold == 11) {
pascal@20634 612 if (/^ inc ax$/ || /^ dec ax$/) {
pascal@20634 613 line[kept++]=$0; next
pascal@20634 614 }
pascal@20634 615 split($2,args,",")
pascal@20634 616 if (/^ mov cl,/) {
pascal@20634 617 split($2,args,",")
pascal@20634 618 if (args[2] >= 8) {
pascal@20634 619 line[kept++]=$0; next
pascal@20634 620 }
pascal@20634 621 }
pascal@20634 622 if (!/^ shl ax,/ || (args[2] != "cl" && args[2] < 8)) {
pascal@20634 623 print " cbw "
pascal@20634 624 }
pascal@20634 625 for (i = 0; i < kept; i++) print line[i]
pascal@20634 626 hold=kept=0
pascal@20634 627 }
pascal@20634 628 else if (hold == 12) {
pascal@20634 629 hold=0
pascal@20634 630 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 631 print " inc " regs[1]
pascal@20634 632 print " inc " regs[1]
pascal@20634 633 }
pascal@20634 634 else print " add " regs[1] ",2"
pascal@20634 635 }
pascal@20634 636 else if (hold == 13) {
pascal@20634 637 hold=0
pascal@20634 638 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 639 print " dec " regs[1]
pascal@20634 640 print " dec " regs[1]
pascal@20634 641 }
pascal@20634 642 else print " sub " regs[1] ",2"
pascal@20634 643 }
pascal@21569 644 else if (hold == 14) {
pascal@21569 645 if (/^ push ax$/) { hold++; next; }
pascal@21569 646 print " push dx";
pascal@21569 647 hold=0;
pascal@21569 648 }
pascal@21569 649 else if (hold == 15) {
pascal@21569 650 if (/^ pop eax$/) { hold++; next; }
pascal@21569 651 print " push dx";
pascal@21569 652 print " push ax";
pascal@21569 653 hold=0;
pascal@21569 654 }
pascal@21569 655 else if (hold == 16) {
pascal@21569 656 hold=0;
pascal@21569 657 if (/^ shr eax,16$/) { print " xchg ax,dx"; next; }
pascal@21569 658 print " push dx";
pascal@21569 659 print " push ax";
pascal@21569 660 print " pop eax";
pascal@21569 661 }
pascal@21569 662 else if (hold == 17) {
pascal@21569 663 hold=0;
pascal@21569 664 if (/^ cmp ax,-1$/) { print " inc ax"; next; }
pascal@21569 665 }
pascal@21576 666 if (/^ call near ptr @fileexist\$/ || # return boolean :
pascal@21576 667 /^ call near ptr @isoreaddir\$/ || # 0=true, -1=false
pascal@21628 668 /^ call near ptr @isoreset\$/ ||
pascal@21628 669 /^ call near ptr @isoopen\$/ ||
pascal@21628 670 /^ call near ptr @isoreadsector\$/ ||
pascal@21628 671 /^ call near ptr @strhead\$/ ||
pascal@23984 672 /^ call near ptr @strcmp\$/ ||
pascal@21576 673 /^ call near ptr @argstr\$/ ||
pascal@21576 674 /^ call near ptr @argnum\$/) { print; hold=17; next; }
pascal@20458 675 s=$0
pascal@20458 676 # These optimisation may break ZF or CF
pascal@20485 677 if (/^ sub sp,2$/) { print " push ax"; next }
pascal@20485 678 if (/^ sub sp,4$/) { print " push ax"; print " push ax"; next }
pascal@20485 679 if (/^ add sp,4$/) { print " pop cx"; print " pop cx"; next }
pascal@20458 680 if (/^ mov d*word ptr .*,0$/ || /^ mov dword ptr .*,large 0$/) {
pascal@20458 681 sub(/mov/,"and",s); print s; next # slower
pascal@20458 682 }
pascal@20458 683 if (/^ mov d*word ptr .*,-1$/ || /^ mov dword ptr .*,large -1$/) {
pascal@20458 684 sub(/mov/,"or",s); print s; next # slower
pascal@20458 685 }
pascal@20458 686 if (/^ or .*,0$/ || /^ and .*,-1$/) next
pascal@20458 687 if (/^ or [abcd]x,/) {
pascal@20458 688 split($2,args,",")
pascal@20458 689 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 690 print " or " substr(args[1],1,1) "l," args[2]; next
pascal@20458 691 }
pascal@20458 692 }
pascal@20458 693 if (/^ and [abcd]x,/) {
pascal@20458 694 split($2,args,",")
pascal@20459 695 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 696 print " and " substr(args[1],1,1) "l," args[2]; next
pascal@20458 697 }
pascal@20458 698 }
pascal@20458 699 if (/^ or e[abcd]x,/) {
pascal@20458 700 split($2,args,",")
pascal@20458 701 if (args[2] == "large") { args[2] = $3 }
pascal@20458 702 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 703 print " or " substr(args[1],2,1) "l," args[2]; next
pascal@20458 704 }
pascal@20458 705 }
pascal@20458 706 if (/^ and e[abcd]x,/) {
pascal@20458 707 split($2,args,",")
pascal@20458 708 if (args[2] == "large") { args[2] = $3 }
pascal@20459 709 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 710 print " and " substr(args[1],2,1) "l," args[2]; next
pascal@20458 711 }
pascal@20458 712 }
pascal@20458 713 if (/^ or e[abcds][ix],/) {
pascal@20458 714 split($2,args,",")
pascal@20458 715 if (args[2] == "large") { args[2] = $3 }
pascal@20458 716 if (isnum(args[2]) && args[2] >= 0 && args[2] < 65536) {
pascal@20458 717 print " or " substr(args[1],2) "," args[2]; next
pascal@20458 718 }
pascal@20458 719 }
pascal@20458 720 if (/^ and e[abcds][ix],/) {
pascal@20458 721 split($2,args,",")
pascal@20458 722 if (args[2] == "large") { args[2] = $3 }
pascal@20459 723 if (isnum(args[2]) && args[2] >= -65536 && args[2] < 0) {
pascal@20458 724 print " and " substr(args[1],2) "," args[2]; next
pascal@20458 725 }
pascal@20458 726 }
pascal@20543 727 if (/^ add word ptr/ || /^ sub word ptr/ ||
pascal@20544 728 /^ add [bcd]x,/ || /^ sub [bcd]x,/) {
pascal@20542 729 split($0,args,",")
pascal@20542 730 if (isnum(args[2]) && (args[2] % 256 == 0)) {
pascal@20544 731 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 732 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20542 733 print s "/256"; next
pascal@20542 734 }
pascal@20542 735 }
pascal@20546 736 if (/^ add dword ptr/ || /^ sub dword ptr/) {
pascal@20458 737 split($0,args,",")
pascal@20543 738 if (args[2] == "large") { args[2] = $3 }
pascal@20458 739 if (isnum(args[2])) {
pascal@20546 740 if (args[2] % 16777216 == 0) {
pascal@20546 741 sub(/dword/,"byte",s)
pascal@20543 742 sub(/\],/,"+3],",s) || sub(/,/,"+3,",s)
pascal@20458 743 print s "/16777216"; next
pascal@20458 744 }
pascal@20458 745 if (args[2] % 65536 == 0) {
pascal@20546 746 sub(/dword/,"word",s)
pascal@20543 747 sub(/\],/,"+2],",s) || sub(/,/,"+2,",s)
pascal@20458 748 print s "/65536"; next
pascal@20458 749 }
pascal@20458 750 }
pascal@20458 751 }
pascal@20458 752 if (/^ mov e.x,/) {
pascal@20458 753 split($2,args,",")
pascal@20458 754 r=args[1]
pascal@20458 755 if (args[2] == "large") { args[2] = $3 }
pascal@20458 756 if (isnum(args[2]) && args[2] % 65536 == args[2]) {
pascal@20458 757 if (args[2] % 256 == args[2] || args[2] % 256 == 0) {
pascal@20458 758 print " xor " r "," r
pascal@20458 759 if (args[2] == 0) next
pascal@20458 760 x=" mov " substr(r,2,1)
pascal@20458 761 if (args[2] % 256 == 0) {
pascal@20458 762 print x "h," args[2] "/256"
pascal@20458 763 }
pascal@20458 764 else { print x "l," args[2] }
pascal@20458 765 next
pascal@20458 766 }
pascal@20458 767 }
pascal@20458 768 }
pascal@21576 769 if (afterjmp) print ";" $0
pascal@21576 770 else print
pascal@21754 771 if (/^ jmp / || /^ call near ptr _boot_kernel/ ||
pascal@23992 772 /^ call near ptr @die\$qpxzc/ ||
pascal@23992 773 /^ call near ptr @exit\$qv/) afterjmp=1
pascal@20458 774 }