wok annotate linld/stuff/src/pipehole.awk @ rev 21801

linld/iso2exe: remove non slitaz dos boot
author Pascal Bellard <pascal.bellard@slitaz.org>
date Sat Aug 10 18:47:30 2019 +0200 (2019-08-10)
parents 04ffefac5707
children 6e3d30b3031f
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@21576 6 if (/^@.*:$/ || / endp$/) afterjmp=0
pascal@21791 7 if (/^ \.386p$/) is386=1
pascal@21791 8 if (file == "" && /debug S/) { file=$3; gsub(/\"/,"",file) }
pascal@21791 9 if (file == "himem.cpp") {
pascal@21791 10 if (/remaining = m-/) ishimem=1
pascal@21791 11 if (ishimem == 1 && is386 == 0) {
pascal@21791 12 if (/si\+8\]$/ || /si\+4\]$/ || /si\+16\]$/) next
pascal@21791 13 if (/si\+6\]$/ || /si\+2\]$/ || /si\+14\]$/) sub(/mov dx,/,"les dx,d")
pascal@21791 14 if (/si\+12\],ax/ || /si\+16\],ax/ || /bp-2\],ax/) sub(/,ax/,",es")
pascal@21791 15 if (/do \{/) ishimem=0
pascal@21791 16 }
pascal@21791 17 } # file == "himem.cpp"
pascal@21791 18 if (file == "load.cpp") {
pascal@21757 19 sub(/DGROUP:_imgs\+65534/,"[di-2]")
pascal@21791 20 if (/short @1@366$/) isload=10
pascal@21791 21 if (isload == 10) { # LOAD.LST
pascal@21791 22 if (/^ je /) next
pascal@21791 23 if (/ptr @die\$qpxzc/) {
pascal@21791 24 $0=" jne @die@"
pascal@21791 25 isload=0
pascal@21791 26 }
pascal@21791 27 }
pascal@21791 28 if (/setup_sects == 0/) isload=9
pascal@21791 29 if (isload == 9) { # LOAD.LST
pascal@21791 30 sub(/,0/,",al")
pascal@21791 31 if (/jne/) isload=0
pascal@21791 32 }
pascal@21784 33 if (/fallback\)\[1\] == 0/) isload=8
pascal@21784 34 if (isload == 8) { # LOAD.LST
pascal@21784 35 if (/load_image/) isload=0
pascal@21784 36 else next
pascal@21784 37 }
pascal@21757 38 if (/cmd_line_ptr =/ && is386 == 0) isload=7
pascal@21757 39 if (isload == 7) { # LOAD.LST
pascal@21757 40 if (/add/ || /xor/ || /extrn/ || /N_LXLSH@/ || /cl,4/) next
pascal@21791 41 if (/enable A20 if needed/) {
pascal@21791 42 print " mov word ptr [bx+si],8000h"
pascal@21757 43 isload=0
pascal@21757 44 }
pascal@21791 45 if (/,ax/) $0=" mov bx,55"
pascal@21791 46 if (/si-463/) $0=" mov bx,-463"
pascal@21791 47 if (/si-465/) $0=" mov word ptr [bx+si-2],-23745"
pascal@21757 48 if (/,dx/) {
pascal@21757 49 print " mov cl,12"
pascal@21757 50 print " shr ax,cl"
pascal@21757 51 sub(/dx/,"ax")
pascal@21757 52 }
pascal@21757 53 }
pascal@21757 54 if (/\[0\] = m-\>fallback/) isload=6
pascal@21757 55 if (isload == 6) { # LOAD.LST
pascal@21757 56 if (/si\+2/) {
pascal@21757 57 print " inc si"
pascal@21757 58 $0=" inc si"
pascal@21757 59 }
pascal@21757 60 if (/les/) sub(/bx,/,"ax,")
pascal@21757 61 if (/bx\+4/ || /es:/) {
pascal@21757 62 if (/bx\+4/) isload=0
pascal@21757 63 next
pascal@21757 64 }
pascal@21757 65 if (/si\+6/) {
pascal@21757 66 print " xchg ax,di"
pascal@21757 67 print " movsw"
pascal@21757 68 print " movsw"
pascal@21757 69 print " movsw"
pascal@21757 70 print " movsw"
pascal@21757 71 print " xchg ax,di"
pascal@21757 72 next
pascal@21757 73 }
pascal@21757 74 }
pascal@21757 75 if (/version_string = /) isload=5
pascal@21757 76 if (isload == 5) { # LOAD.LST
pascal@21757 77 sub(/ax,/,"bx,")
pascal@21757 78 if (/_version_string,/) isload=0
pascal@21757 79 if (/mov bx,ax/) next
pascal@21757 80 }
pascal@21757 81 if (/topseg\(\)>>12/) isload=4
pascal@21757 82 if (isload == 4 && is386 == 0) { # LOAD.LST
pascal@21757 83 if (/push/ || /pop/) next
pascal@21757 84 if (/ax,cs/) {
pascal@21757 85 sub(/ax,cs/,"bx,cs")
pascal@21757 86 }
pascal@21757 87 if (/dx,dx/) next
pascal@21757 88 sub(/ax,dx/,"ax,bx")
pascal@21784 89 if (/call/) {
pascal@21784 90 print " cmp ax,0fffh"
pascal@21784 91 print " jae @sys@ok"
pascal@21784 92 print " mov ax,0fffh"
pascal@21784 93 print "@sys@ok:"
pascal@21784 94 isload=400
pascal@21784 95 }
pascal@21757 96 }
pascal@21791 97 if (isload == 400) {
pascal@21791 98 if (/call/) {
pascal@21791 99 print " extrn N_LXLSH@4:near"
pascal@21791 100 sub(/N_LXLSH@/,"N_LXLSH@4")
pascal@21791 101 }
pascal@21757 102 sub(/,0/,",dh")
pascal@21791 103 if (/_base_himem\+2/ || /pop/ || /push/) next
pascal@21791 104 if (/_base_himem$/) {
pascal@21791 105 sub(/mov dx,/,"les dx,d")
pascal@21791 106 isload++
pascal@21791 107 }
pascal@21791 108 }
pascal@21791 109 if (isload == 401) {
pascal@21791 110 sub(/,ax/,",es")
pascal@21791 111 if (/load_image/) isload=0
pascal@21757 112 }
pascal@21757 113 if (isload == 4 && is386) { # LOAD.LST
pascal@21757 114 sub(/dx,cs/,"edx,cs")
pascal@21757 115 sub(/eax/,"edx")
pascal@21784 116 if (/shl/) {
pascal@21784 117 print " mov ax,0fffh"
pascal@21784 118 print " cmp dx,ax"
pascal@21784 119 print " jae @sys@ok"
pascal@21784 120 print " xchg ax,dx"
pascal@21784 121 print "@sys@ok:"
pascal@21784 122 }
pascal@21757 123 sub(/ax,9/,"dx,9")
pascal@21758 124 if (/,0$/) sub(/,0/,",dh")
pascal@21757 125 if (/movzx/) next
pascal@21757 126 if (/fallback = base_himem/) { isload=0 }
pascal@21757 127 }
pascal@21754 128 if (/void load_initrd\(\)/) isload=3
pascal@21754 129 if (isload == 3) { # LOAD.LST
pascal@21754 130 if(/push di/ || /pop di/) next
pascal@21754 131 sub(/\[di/,"[bx")
pascal@21754 132 sub(/\di,/,"bx,")
pascal@21754 133 }
pascal@21750 134 if (/vid_mode = vid_mode/) isload=2
pascal@21750 135 if (isload == 2) { # LOAD.LST
pascal@21750 136 sub(/,0/,""); sub(/cmp /,"mov cx,")
pascal@21750 137 sub(/je/,"jcxz")
pascal@21750 138 if (/ax,word/) next
pascal@21750 139 sub(/,ax/,",cx")
pascal@21757 140 if (/version_string/ || /starting linux 1\.3\.73/) isload=0
pascal@21750 141 }
pascal@21791 142 if (/Not a kernel/ || /_rm_size=0x200/ || /heap_top = _rm_buf/) isload=1
pascal@21750 143 if (isload == 1) { # LOAD.LST
pascal@21791 144 if (/ptr .die\$qpxzc/) $0="@die@:\n" $0
pascal@21729 145 if (/mov al,byte ptr/ && is386) {
pascal@21729 146 print " movzx eax,byte ptr [si]"
pascal@21729 147 next
pascal@21729 148 }
pascal@21791 149 if (is386 == 0) {
pascal@21791 150 if (/di-5\],ax/) print " cwd"
pascal@21791 151 sub(/,0$/,",dx")
pascal@21791 152 }
pascal@21729 153 if (/ax,word ptr/) next
pascal@21729 154 if (/^ call/) isload=0
pascal@21729 155 }
pascal@21791 156 } # file == "load.cpp"
pascal@21791 157 if (file == "iso9660.cpp") {
pascal@21791 158 if (/<< SECTORBITS/) isiso=9
pascal@21791 159 if (isiso == 9) { # ISO9660.LST
pascal@21791 160 if (/dx,/) next
pascal@21791 161 sub(/mov ax,/,"les ax,d")
pascal@21791 162 if (/^ call/) {
pascal@21791 163 print " extrn N_LXLSH@ES:near"
pascal@21791 164 sub(/N_LXLSH@/,"N_LXLSH@ES")
pascal@21791 165 isiso=0
pascal@21791 166 }
pascal@21791 167 }
pascal@21791 168 if (/filesize =/) isiso=8
pascal@21791 169 if (isiso == 8) { # ISO9660.LST
pascal@21791 170 if (/ax,/) next
pascal@21791 171 sub(/mov dx,/,"les dx,d")
pascal@21791 172 sub(/,ax/,",es")
pascal@21791 173 if (/filemod/) isiso=0
pascal@21791 174 }
pascal@21754 175 if (/CD001/) isiso=7
pascal@21754 176 if (isiso == 7) { # ISO9660.LST
pascal@21754 177 sub(/mov ax,-1/,"dec ax")
pascal@21754 178 if (/jmp/) isiso=0
pascal@21754 179 }
pascal@21754 180 if (/int len =/) isiso=6
pascal@21754 181 if (isiso == 6) { # ISO9660.LST
pascal@21754 182 if (/dx,ax/) next
pascal@21754 183 sub(/ax/,"dx")
pascal@21754 184 sub(/cx,di/,"bx,di")
pascal@21754 185 sub(/cx,dx/,"bx,ax")
pascal@21754 186 sub(/di,dx/,"di,ax")
pascal@21754 187 if (/while/) isiso=2
pascal@21754 188 }
pascal@21754 189 if (/entrysize =/) isiso=5
pascal@21754 190 if (isiso == 5) { # ISO9660.LST
pascal@21754 191 if (/ax,ax/) next
pascal@21754 192 sub(/ax/,"cx")
pascal@21754 193 sub(/je/,"jcxz")
pascal@21754 194 if (/return/) isiso=0
pascal@21754 195 }
pascal@21735 196 if (/x->curdirsize == 0xFFFF/) isiso=4
pascal@21735 197 if (isiso == 4) { # ISO9660.LST
pascal@21754 198 sub(/DGROUP:_isostate\+18/,"[si+18]")
pascal@21754 199 sub(/DGROUP:_isostate\+20/,"[si+20]")
pascal@21747 200 if (/goto restarted/) isiso=0
pascal@21735 201 }
pascal@21791 202 } # file == "iso9660.cpp"
pascal@21791 203 if (file == "iso9660.cpp" || file == "tazboot.cpp") {
pascal@21754 204 if (/do s\+\+; while/) isiso=3
pascal@21801 205 if (/for \(p = s; \*s && \*s \!=/) isiso=3 # tazboot/main
pascal@21750 206 if (isiso == 3) { # ISO9660.LST, TAZBOOT.LST
pascal@21754 207 sub(/cmp byte ptr \[.i\]/,"sub al")
pascal@21754 208 if (/mov byte ptr \[bp-5\],al/) $0=" push ax"
pascal@21754 209 if (/mov al,byte ptr \[bp-5\]/) $0=" pop ax"
pascal@21754 210 if (/inc /) { r=$2; print; next }
pascal@21754 211 if (/al,0/) print " mov al,[" r "]"
pascal@21754 212 if (/al,byte ptr/) sub(/mov/,"xchg")
pascal@21754 213 if (/byte ptr \[.*\],0/) next
pascal@21791 214 if (/jmp/) {
pascal@21791 215 print " mov bx,si"
pascal@21791 216 $0=" db 0A8h ; test al,xx instead of " $0
pascal@21791 217 }
pascal@21754 218 if (/word ptr \[bp-4\]/) next
pascal@21754 219 if (/\) s\+\+;/ || /\],-1/) isiso=0
pascal@21735 220 }
pascal@21791 221 } # file == "iso9660.cpp" || file == "tazboot.cpp"
pascal@21791 222 if (file == "iso9660.cpp") {
pascal@21735 223 if (/endname = NULL/) isiso=2
pascal@21735 224 if (isiso == 2) { # ISO9660.LST
pascal@21735 225 if (/mov bx,cx/) next
pascal@21735 226 gsub(/cx/,"bx")
pascal@21754 227 sub(/DGROUP:_isostate\+35/,"[si+35]")
pascal@21735 228 }
pascal@21735 229 if (/const char \*n = name/) isiso=1
pascal@21735 230 if (isiso == 1) { # ISO9660.LST
pascal@21735 231 if ((/mov word ptr \[si\+32\],ax/ ) ||
pascal@21754 232 (/mov ax,word ptr \[si\+2\]/) ||
pascal@21735 233 (/bx,word ptr \[si\+32\]/) || (/ax,dx/)) next
pascal@21729 234 if (/dx,/) sub(/dx/,"ax")
pascal@21754 235 if ((/sub ax,word ptr \[si\+2\]/) ||
pascal@21754 236 (/\[si\+16\]/) || (/ax,di/)) sub(/ax/,"bx")
pascal@21754 237 if (/add word ptr \[si\+32\],ax/) $0=" add bx,word ptr [si+16]"
pascal@21735 238 if (/al,/ || /,al/) sub(/al/,"cl")
pascal@21754 239 if (/cmp byte ptr \[si\+34\],0/) $0=" or cl,cl"
pascal@21735 240 if (/jne @@0$/) next
pascal@21735 241 if (/jmp @3@58$/) $0=" je @3@58"
pascal@21754 242 sub(/mov ax,-1/,"dec ax")
pascal@21754 243 }
pascal@21791 244 } # file == "iso9660.cpp"
pascal@21754 245 if (/endp/) { xlabel = ""; goto2=0 }
pascal@21801 246 if (/isoopen\(s\+7\)/ && xlabel == "") goto2=1 # tazboot/bootiso
pascal@21801 247 if (/_vid_mode,ax/ && xlabel == "") goto2=1 # tazboot/main
pascal@21801 248 if (/_initrd_name,si/ && xlabel == "") goto2=1 # tazboot/main
pascal@21801 249 if (/_base_himem\+2,/ && xlabel == "@") goto2=1 # tazboot/bootiso tazboot/main
pascal@21801 250 if (/DGROUP:_skip_alloc/ && xlabel == "@") goto2=1 # tazboot/bootiso tazboot/main
pascal@21754 251 if (/puts\(cmdline\)/ && xlabel == "@@") goto2=1
pascal@21754 252 if (goto2 == 1 && /jmp/) { # TAZBOOT.LST && LINLD.LST
pascal@21754 253 print $NF xlabel "@:"
pascal@21754 254 label=$NF
pascal@21754 255 }
pascal@21754 256 if (goto2 > 0 && label == $NF) {
pascal@21754 257 $0=$0 xlabel
pascal@21754 258 if (goto2++ == 1) xlabel=xlabel "@"
pascal@21754 259 }
pascal@21801 260 if (file == "tazboot.cpp" && /close\(x/) isotazboot=16
pascal@21801 261 if (isotazboot == 160) { # TAZBOOT.LST
pascal@21801 262 $0="; " $0
pascal@21801 263 if (/ret/) isotazboot=0
pascal@21801 264 }
pascal@21801 265 if (isotazboot == 16) { # TAZBOOT.LST
pascal@21801 266 if (/@.@/) {
pascal@21801 267 isotazboot=160
pascal@21801 268 next
pascal@21801 269 }
pascal@21801 270 }
pascal@21801 271 if (file == "tazboot.cpp" && /jne @@2/) isotazboot=15
pascal@21801 272 if (isotazboot == 15) { # TAZBOOT.LST
pascal@21801 273 if (/@.@/) {
pascal@21801 274 print " pop di"
pascal@21801 275 print " pop si"
pascal@21801 276 print " mov sp,bp"
pascal@21801 277 print " pop bp"
pascal@21801 278 print " ret"
pascal@21801 279 next
pascal@21801 280 }
pascal@21801 281 if (/skip_alloc/) isotazboot=0
pascal@21801 282 }
pascal@21791 283 if (/if\(\*s>=/) isotazboot=14
pascal@21791 284 if (isotazboot == 14) { # LINLD.LST
pascal@21791 285 if (/jmp/) {
pascal@21791 286 $0=" db 0A9h ; test ax,xxxx instead of " $0
pascal@21791 287 isotazboot=0
pascal@21791 288 }
pascal@21791 289 }
pascal@21801 290 if (file == "tazboot.cpp" && /; s \+= 4/) isotazboot=13 # tazboot/main
pascal@21791 291 if (isotazboot == 13) { # TAZBOOT.LST
pascal@21791 292 if (/si,4/) $0=" lea bx,[si+4]"
pascal@21791 293 if (/bx,si/) next
pascal@21791 294 if (/DGROUP:_topmem/ || /set_iso/) isotazboot=0
pascal@21791 295 }
pascal@21801 296 if (file == "tazboot.cpp" && /case 0x652F:/) isotazboot=12 # tazboot/main
pascal@21791 297 if (isotazboot == 12) { # TAZBOOT.LST
pascal@21791 298 sub(/si,word/,"bx,word")
pascal@21791 299 if (/short/) isotazboot=0
pascal@21791 300 }
pascal@21801 301 if (/return load_kernel/) isotazboot=11 # tazboot/isokernel
pascal@21791 302 if (isotazboot == 11) { # TAZBOOT.LST
pascal@21791 303 sub(/call/,"jmp")
pascal@21791 304 if (/ret/ || /pop/) next
pascal@21791 305 if (/endp/) isotazboot=0
pascal@21791 306 }
pascal@21801 307 if (/cmdline=s\+=3/ || /magic \!= 0/ || /&root_dev =/) { isotazboot=10; j="" } # ,tazboot/bootiso,tazboot/main
pascal@21754 308 if (isotazboot == 10) { # TAZBOOT.LST && LINLD.LST
pascal@21754 309 if (/je/ || /jne/) { j=$1; next }
pascal@21754 310 if (/jmp/) {
pascal@21754 311 if (j=="jne") sub(/jmp/,"je")
pascal@21754 312 else if (j=="je") sub(/jmp/,"jne")
pascal@21754 313 isotazboot=0
pascal@21754 314 }
pascal@21754 315 }
pascal@21801 316 if (/static const unsigned long initrddesc = 18L/) isotazboot=9 # tazboot/bootiso
pascal@21754 317 if (isotazboot == 9) { # TAZBOOT.LST
pascal@21754 318 if (/,0/) {
pascal@21754 319 split($4,y,",")
pascal@21754 320 print " mov bx,offset " y[1]
pascal@21801 321 sub(/DGROUP:.*,/,"[bx],")
pascal@21754 322 }
pascal@21801 323 if (/mov/ && $3 == y[1]) next
pascal@21801 324 if (/je/) next
pascal@21801 325 if (/jmp/) sub(/jmp/,"jne")
pascal@21801 326 sub(/ax,offset/,"bx,offset")
pascal@21801 327 if (/bx,ax/) { isotazboot=0; next }
pascal@21729 328 }
pascal@21801 329 if (/isoopen\(s\+7\) != -1/) isotazboot=8 # tazboot/bootiso
pascal@21750 330 if (isotazboot == 8) { # TAZBOOT.LST
pascal@21801 331 sub(/\[bx/,"[si")
pascal@21801 332 if (/bx,si/) next
pascal@21750 333 if (/magic/) isotazboot=0
pascal@21750 334 }
pascal@21801 335 if (/isoopen\(\"bzImage\"\)/) isotazboot=7 # tazboot/bootiso
pascal@21750 336 if (isotazboot == 7) { # TAZBOOT.LST
pascal@21791 337 if (/inc/ || /,al/) next
pascal@21791 338 if (/al,byte/) sub (/mov al,/,"inc ")
pascal@21750 339 if (/isokernel/) isotazboot=0
pascal@21750 340 }
pascal@21801 341 if (/if \(c\) s\+\+;/) isotazboot=6 # tazboot/main
pascal@21750 342 if (isotazboot == 6) { # TAZBOOT.LST
pascal@21750 343 if (/cmp/) {
pascal@21750 344 $0=" cmp al,0"
pascal@21750 345 isotazboot=0
pascal@21750 346 }
pascal@21750 347 }
pascal@21801 348 if (/static void next_chunk/) isotazboot=5 # tazboot/next_chunk
pascal@21791 349 if (isotazboot == 501) {
pascal@21791 350 if (/ret/) {
pascal@21791 351 print "@1@86:"
pascal@21791 352 isotazboot=0
pascal@21791 353 }
pascal@21791 354 }
pascal@21754 355 if (isotazboot == 5 || isotazboot == 500) { # TAZBOOT.LST
pascal@21750 356 if (/cx,ax/) $0=" xchg ax,bx"
pascal@21754 357 if (/ax,word ptr \[si\+28\]/ && isotazboot == 500) next
pascal@21750 358 if (/bx,cx/) next
pascal@21754 359 if (/push/ || /pop/ || /bp,sp/ || /si,/) next
pascal@21754 360 sub(/\[si/,"[di")
pascal@21754 361 if (/initrd_info/) isotazboot=500
pascal@21791 362 if (/bx\+6\]/) next
pascal@21791 363 if (/bx\+4\]/) sub(/mov dx,/,"les dx,d")
pascal@21791 364 sub(/di\+24\],ax/,"di+24],es")
pascal@21791 365 sub(/call/,"jmp")
pascal@21791 366 if (/ret/ || /pop/ || /^@1@86:/) next
pascal@21791 367 if (/_isostate\+14/) next
pascal@21791 368 if (/_isostate\+12/) {
pascal@21791 369 sub(/mov ax,/,"les ax,d")
pascal@21791 370 print
pascal@21791 371 print " mov dx,es"
pascal@21791 372 next
pascal@21791 373 }
pascal@21791 374 if (/ax,-4/) isotazboot++
pascal@21750 375 }
pascal@21801 376 if (/0x7FF0/) isotazboot=4 # tazboot/bootiso
pascal@21750 377 if (isotazboot == 4) { # TAZBOOT.LST
pascal@21750 378 if (/ax,word ptr/) {
pascal@21750 379 print " mov ax,32752"
pascal@21754 380 print " cwd"
pascal@21750 381 sub(/mov/,"sub")
pascal@21750 382 }
pascal@21750 383 if (/bx,/ || /cx,/ || /dx,/) next
pascal@21754 384 sub(/,0/,",dx")
pascal@21754 385 sub(/,bx/,",dx")
pascal@21750 386 sub(/,cx/,",ax")
pascal@21754 387 if (/@addinitrd\$qv/) isotazboot=0
pascal@21750 388 }
pascal@21801 389 if (/c = x->filename/) isotazboot=3 # tazboot/bootiso
pascal@21750 390 if (isotazboot == 3) { # TAZBOOT.LST
pascal@21750 391 if (/ax,/) $0=" xchg ax,bx"
pascal@21750 392 if (/\]$/) next
pascal@21750 393 if (/@strcpy\$qpxzct1/) isotazboot=0
pascal@21750 394 }
pascal@21801 395 if (/base_himem = memtop/) isotazboot=2 # tazboot/bootiso
pascal@21750 396 if (isotazboot == 2) { # TAZBOOT.LST
pascal@21801 397 if (/word ptr \[si\+2\],0/) {
pascal@21754 398 print s; hold=0
pascal@21801 399 print " mov bx,word ptr [si+2]"
pascal@21752 400 $0=" or bx,bx"
pascal@21752 401 }
pascal@21752 402 if (/\[bp-4\],ax/) sub(/ax/,"bx")
pascal@21801 403 if (/ax,word ptr \[si\+2\]/ || /bx,ax/) next
pascal@21791 404 if (/_base_himem\+2,dx/) {
pascal@21791 405 print " mov bx,offset DGROUP:_base_himem+2"
pascal@21791 406 }
pascal@21791 407 sub(/DGROUP:_base_himem,/,"[bx-2],")
pascal@21791 408 sub(/DGROUP:_base_himem\+2,/,"[bx],")
pascal@21791 409 sub(/DGROUP:_base_himem\+3,/,"[bx+1],")
pascal@21750 410 if (/@strcmp\$qpxzct1/) isotazboot=0
pascal@21750 411 }
pascal@21801 412 if (/static void addinitrd/) isotazboot=100 # tazboot/addinitrd
pascal@21751 413 if (isotazboot == 100) { # TAZBOOT.LST
pascal@21751 414 if (/cx,ax/) {
pascal@21754 415 print " mov si,offset _isostate+8"
pascal@21757 416 print " push ds"
pascal@21757 417 print " pop es"
pascal@21754 418 print " xchg ax,di"
pascal@21751 419 print " movsw"
pascal@21751 420 print " movsw"
pascal@21751 421 print " movsw"
pascal@21751 422 print " movsw"
pascal@21754 423 $0=" xchg ax,di"
pascal@21751 424 }
pascal@21751 425 if (/mov/ && !/si/ && !/cl/) next
pascal@21754 426 if (/void load_initrds/) isotazboot=101
pascal@21751 427 }
pascal@21754 428 if (isotazboot == 101 || isotazboot == 102) { # TAZBOOT.LST
pascal@21754 429 sub(/\[si/,"[di"); sub(/si,/,"di,"); sub(/si$/,"di")
pascal@21754 430 sub(/DGROUP:_imgs\+38$/,"[di+38-32]")
pascal@21754 431 sub(/DGROUP:_imgs\+40$/,"[di+40-32]")
pascal@21754 432 if (/isofd/) isotazboot=102
pascal@21754 433 if (/push/ && isotazboot == 102) next
pascal@21754 434 if (/pop/ && isotazboot == 102) next
pascal@21754 435 if (/load_initrd/) isotazboot=101
pascal@21754 436 if (/isokernel/) isotazboot=103
pascal@21754 437 }
pascal@21754 438 if (isotazboot > 102) { # TAZBOOT.LST
pascal@21754 439 if (/push/ || /pop/) next
pascal@21754 440 sub(/\[si/,"[bx")
pascal@21750 441 sub(/si,/,"bx,")
pascal@21750 442 if (/static void bootiso/) isotazboot=0
pascal@21750 443 }
pascal@21729 444 if (wascall) {
pascal@21729 445 if (rcall != "") {
pascal@21729 446 if (/,ax$/) print " mov " rcall ",ax"
pascal@21729 447 else print " xchg ax," rcall
pascal@21729 448 wascall=0
pascal@21729 449 }
pascal@21729 450 else if (/^ mov .i,ax$/) {
pascal@21729 451 split($2,y,",")
pascal@21729 452 rcall=y[1]
pascal@21729 453 next
pascal@21729 454 }
pascal@21729 455 else wascall=0
pascal@21729 456 }
pascal@21729 457 if (/^ call /) { wascall=1; rcall="" }
pascal@20458 458 if (hold == 0) {
pascal@20458 459 s=$0
pascal@20534 460 if (/^ mov .[ix],bx$/ || /^ mov .[ix],.i$/) {
pascal@20543 461 r=$2; kept=0
pascal@20458 462 hold=1; split($2,regs,","); next
pascal@20458 463 }
pascal@21729 464 if (/^ inc e?.[ixhl]/ || /^ dec e?.[ixhl]/) {
pascal@20458 465 hold=2; r=$2; next
pascal@20458 466 }
pascal@20458 467 if (/^ mov [abcds][ix],/ && ! /,.s/) {
pascal@20458 468 hold=3; split($2,regs,","); next
pascal@20458 469 }
pascal@20458 470 if (/^ movzx eax,ax$/) { hold=4; next }
pascal@20544 471 if (/^ cmp word ptr/ || /^ cmp [bcd]x,/) {
pascal@20543 472 split($0,regs,",")
pascal@20543 473 if (isnum(regs[2]) && regs[2] != 0 &&
pascal@20543 474 (regs[2] % 256) == 0) {
pascal@20549 475 hold=5; next
pascal@20543 476 }
pascal@20543 477 }
pascal@20630 478 if (/^ mov ax,cs$/) { hold=6; kept=0; next }
pascal@20630 479 if (/^ mov cl,4$/) { hold=7; next }
pascal@20630 480 if (/^ cmp word ptr DGROUP:.*,0$/) {
pascal@20630 481 hold=8; split($2,regs,","); next
pascal@20630 482 }
pascal@20634 483 if (/^ cbw/) { hold=11; kept=0; next }
pascal@20634 484 if (/^ add [abcds][ix],2$/) {
pascal@20634 485 split($2,regs,","); hold=12; next
pascal@20634 486 }
pascal@20634 487 if (/^ sub [abcds][ix],2$/) {
pascal@20634 488 split($2,regs,","); hold=13; next
pascal@20634 489 }
pascal@21569 490 if (/^ push dx$/) {
pascal@21569 491 hold=14; next;
pascal@21569 492 }
pascal@20458 493 }
pascal@20458 494 else if (hold == 1) {
pascal@20543 495 if (/^ ;/) { line[kept++]=$0; next }
pascal@20458 496 hold=0; split($2,args,","); op=""
pascal@20458 497 if ($1 == "add") op="+"
pascal@20458 498 if ($1 == "sub") op="-"
pascal@20751 499 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 500 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20543 501 if (op != "" && regs[1] == args[1]) {
pascal@20543 502 if (isnum(args[2])) {
pascal@20630 503 for (i = kept++; i > 0; i--) line[i] = line[i-1]
pascal@20630 504 line[0] = "\tlea\t" regs[1] ",[" regs[2] op args[2] "]"
pascal@20630 505 hold=10; next
pascal@20543 506 }
pascal@20543 507 line[kept++]=$0
pascal@20543 508 hold=1
pascal@20458 509 next
pascal@20458 510 }
pascal@20520 511 if (/^ pop [ds]i/ && regs[2] ~ /^[ds]i$/) {
pascal@20520 512 print " xchg " r
pascal@20520 513 }
pascal@20543 514 else print s
pascal@20543 515 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20458 516 }
pascal@20458 517 else if (hold == 2) {
pascal@21729 518 split($0,args,",")
pascal@21729 519 if (/^ mov / && r == args[2]) { print s; s=$0; next }
pascal@21729 520 split($2,args,",")
pascal@21729 521 hold=0; print s
pascal@20458 522 if ($1 == "or" && r == args[1] && r == args[2]) next # don't clear C ...
pascal@20458 523 }
pascal@20458 524 else if (hold == 3) {
pascal@20458 525 hold=0
pascal@21576 526 if (/^ call / && regs[2] == "ax") s=" xchg ax," regs[1]
pascal@20542 527 if (/^ add [abcds][ix],/) {
pascal@20458 528 split($2,regs2,",")
pascal@20458 529 if (regs[1] == regs2[1] && (regs2[2] == "offset" || isnum(regs2[2]))) {
pascal@20549 530 t=$0; sub(/mov/,$1,s); sub(/add/,"mov",t)
pascal@20458 531 print t; print s; next
pascal@20458 532 }
pascal@20458 533 }
pascal@20458 534 print s
pascal@20458 535 }
pascal@20458 536 else if (hold == 4) {
pascal@20458 537 hold=0
pascal@20458 538 if (/^ push eax$/) {
pascal@20458 539 print " push 0"; print " push ax"; next
pascal@20458 540 } else { print s }
pascal@20458 541 }
pascal@20543 542 else if (hold == 5) {
pascal@20543 543 hold=0
pascal@20543 544 if ($1 == "jae" || $1 == "jb") {
pascal@20544 545 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 546 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20543 547 s = s "/256"
pascal@20543 548 }
pascal@20543 549 print s
pascal@20543 550 }
pascal@20630 551 else if (hold == 6) {
pascal@20630 552 if (($1 == "and" || $1 == "add") && $2 ~ /^ax,/) {
pascal@20630 553 line[kept++]=$0
pascal@20630 554 next
pascal@20630 555 }
pascal@20630 556 p=$0
pascal@20630 557 if (/^ movzx eax,ax$/) {
pascal@20630 558 s=" mov eax,cs"; p=""
pascal@20630 559 }
pascal@20630 560 print s
pascal@20630 561 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20630 562 if (p != "") print p
pascal@20630 563 hold=0; next
pascal@20630 564 }
pascal@20630 565 else if (hold == 7) {
pascal@20458 566 hold=0
pascal@20520 567 if (/^ call near ptr N_LXURSH@$/) {
pascal@20520 568 print " extrn N_LXURSH@4:near"
pascal@20520 569 print " call near ptr N_LXURSH@4"
pascal@20520 570 next
pascal@20520 571 }
pascal@20528 572 if (/^ call near ptr N_LXLSH@$/) {
pascal@20528 573 print " extrn N_LXLSH@4:near"
pascal@20528 574 print " call near ptr N_LXLSH@4"
pascal@20528 575 next
pascal@20528 576 }
pascal@20520 577 print s
pascal@20458 578 }
pascal@20630 579 else if (hold == 8) {
pascal@20630 580 if ($1 == "je" || $1 == "jne") { p=$0; hold=9; next }
pascal@20630 581 hold=0
pascal@20630 582 print s
pascal@20630 583 }
pascal@20630 584 else if (hold == 9) {
pascal@20630 585 hold=0; split($2,args,",")
pascal@20630 586 if (/^ mov ax,/ && args[2] == regs[1]) {
pascal@20630 587 print; print " or ax,ax"; print p; next
pascal@20630 588 }
pascal@20630 589 print s; print p;
pascal@20630 590 }
pascal@20630 591 else if (hold == 10) {
pascal@20751 592 split($2,args,","); op=""
pascal@20751 593 if ($1 == "add") op="+"
pascal@20751 594 if ($1 == "sub") op="-"
pascal@20751 595 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 596 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20751 597 if (op != "" && isnum(args[2])) {
pascal@20751 598 split(line[0],reg,",")
pascal@20751 599 if (substr(reg[1],length(reg[1])-1,2) == args[1]) {
pascal@20751 600 line[0] = substr(line[0],1,length(line[0])-1) op args[2] "]"
pascal@20751 601 next
pascal@20751 602 }
pascal@20751 603 }
pascal@20630 604 hold=0
pascal@20630 605 if (/^ mov [sd]i,ax$/) {
pascal@20630 606 split($2,args,",")
pascal@20630 607 for (i = 0; i < kept; i++) {
pascal@20630 608 sub(/ax/,args[1],line[i]); print line[i]
pascal@20630 609 }
pascal@20630 610 next
pascal@20630 611 }
pascal@20630 612 for (i = 0; i < kept; i++) print line[i]
pascal@20630 613 }
pascal@20634 614 else if (hold == 11) {
pascal@20634 615 if (/^ inc ax$/ || /^ dec ax$/) {
pascal@20634 616 line[kept++]=$0; next
pascal@20634 617 }
pascal@20634 618 split($2,args,",")
pascal@20634 619 if (/^ mov cl,/) {
pascal@20634 620 split($2,args,",")
pascal@20634 621 if (args[2] >= 8) {
pascal@20634 622 line[kept++]=$0; next
pascal@20634 623 }
pascal@20634 624 }
pascal@20634 625 if (!/^ shl ax,/ || (args[2] != "cl" && args[2] < 8)) {
pascal@20634 626 print " cbw "
pascal@20634 627 }
pascal@20634 628 for (i = 0; i < kept; i++) print line[i]
pascal@20634 629 hold=kept=0
pascal@20634 630 }
pascal@20634 631 else if (hold == 12) {
pascal@20634 632 hold=0
pascal@20634 633 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 634 print " inc " regs[1]
pascal@20634 635 print " inc " regs[1]
pascal@20634 636 }
pascal@20634 637 else print " add " regs[1] ",2"
pascal@20634 638 }
pascal@20634 639 else if (hold == 13) {
pascal@20634 640 hold=0
pascal@20634 641 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 642 print " dec " regs[1]
pascal@20634 643 print " dec " regs[1]
pascal@20634 644 }
pascal@20634 645 else print " sub " regs[1] ",2"
pascal@20634 646 }
pascal@21569 647 else if (hold == 14) {
pascal@21569 648 if (/^ push ax$/) { hold++; next; }
pascal@21569 649 print " push dx";
pascal@21569 650 hold=0;
pascal@21569 651 }
pascal@21569 652 else if (hold == 15) {
pascal@21569 653 if (/^ pop eax$/) { hold++; next; }
pascal@21569 654 print " push dx";
pascal@21569 655 print " push ax";
pascal@21569 656 hold=0;
pascal@21569 657 }
pascal@21569 658 else if (hold == 16) {
pascal@21569 659 hold=0;
pascal@21569 660 if (/^ shr eax,16$/) { print " xchg ax,dx"; next; }
pascal@21569 661 print " push dx";
pascal@21569 662 print " push ax";
pascal@21569 663 print " pop eax";
pascal@21569 664 }
pascal@21569 665 else if (hold == 17) {
pascal@21569 666 hold=0;
pascal@21569 667 if (/^ cmp ax,-1$/) { print " inc ax"; next; }
pascal@21569 668 }
pascal@21576 669 if (/^ call near ptr @fileexist\$/ || # return boolean :
pascal@21576 670 /^ call near ptr @isoreaddir\$/ || # 0=true, -1=false
pascal@21628 671 /^ call near ptr @isoreset\$/ ||
pascal@21628 672 /^ call near ptr @isoopen\$/ ||
pascal@21628 673 /^ call near ptr @isoreadsector\$/ ||
pascal@21628 674 /^ call near ptr @strhead\$/ ||
pascal@21576 675 /^ call near ptr @argstr\$/ ||
pascal@21576 676 /^ call near ptr @argnum\$/) { print; hold=17; next; }
pascal@20458 677 s=$0
pascal@20458 678 # These optimisation may break ZF or CF
pascal@20485 679 if (/^ sub sp,2$/) { print " push ax"; next }
pascal@20485 680 if (/^ sub sp,4$/) { print " push ax"; print " push ax"; next }
pascal@20485 681 if (/^ add sp,4$/) { print " pop cx"; print " pop cx"; next }
pascal@20458 682 if (/^ mov d*word ptr .*,0$/ || /^ mov dword ptr .*,large 0$/) {
pascal@20458 683 sub(/mov/,"and",s); print s; next # slower
pascal@20458 684 }
pascal@20458 685 if (/^ mov d*word ptr .*,-1$/ || /^ mov dword ptr .*,large -1$/) {
pascal@20458 686 sub(/mov/,"or",s); print s; next # slower
pascal@20458 687 }
pascal@20458 688 if (/^ or .*,0$/ || /^ and .*,-1$/) next
pascal@20458 689 if (/^ or [abcd]x,/) {
pascal@20458 690 split($2,args,",")
pascal@20458 691 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 692 print " or " substr(args[1],1,1) "l," args[2]; next
pascal@20458 693 }
pascal@20458 694 }
pascal@20458 695 if (/^ and [abcd]x,/) {
pascal@20458 696 split($2,args,",")
pascal@20459 697 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 698 print " and " substr(args[1],1,1) "l," args[2]; next
pascal@20458 699 }
pascal@20458 700 }
pascal@20458 701 if (/^ or e[abcd]x,/) {
pascal@20458 702 split($2,args,",")
pascal@20458 703 if (args[2] == "large") { args[2] = $3 }
pascal@20458 704 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 705 print " or " substr(args[1],2,1) "l," args[2]; next
pascal@20458 706 }
pascal@20458 707 }
pascal@20458 708 if (/^ and e[abcd]x,/) {
pascal@20458 709 split($2,args,",")
pascal@20458 710 if (args[2] == "large") { args[2] = $3 }
pascal@20459 711 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 712 print " and " substr(args[1],2,1) "l," args[2]; next
pascal@20458 713 }
pascal@20458 714 }
pascal@20458 715 if (/^ or e[abcds][ix],/) {
pascal@20458 716 split($2,args,",")
pascal@20458 717 if (args[2] == "large") { args[2] = $3 }
pascal@20458 718 if (isnum(args[2]) && args[2] >= 0 && args[2] < 65536) {
pascal@20458 719 print " or " substr(args[1],2) "," args[2]; next
pascal@20458 720 }
pascal@20458 721 }
pascal@20458 722 if (/^ and e[abcds][ix],/) {
pascal@20458 723 split($2,args,",")
pascal@20458 724 if (args[2] == "large") { args[2] = $3 }
pascal@20459 725 if (isnum(args[2]) && args[2] >= -65536 && args[2] < 0) {
pascal@20458 726 print " and " substr(args[1],2) "," args[2]; next
pascal@20458 727 }
pascal@20458 728 }
pascal@20543 729 if (/^ add word ptr/ || /^ sub word ptr/ ||
pascal@20544 730 /^ add [bcd]x,/ || /^ sub [bcd]x,/) {
pascal@20542 731 split($0,args,",")
pascal@20542 732 if (isnum(args[2]) && (args[2] % 256 == 0)) {
pascal@20544 733 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 734 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20542 735 print s "/256"; next
pascal@20542 736 }
pascal@20542 737 }
pascal@20546 738 if (/^ add dword ptr/ || /^ sub dword ptr/) {
pascal@20458 739 split($0,args,",")
pascal@20543 740 if (args[2] == "large") { args[2] = $3 }
pascal@20458 741 if (isnum(args[2])) {
pascal@20546 742 if (args[2] % 16777216 == 0) {
pascal@20546 743 sub(/dword/,"byte",s)
pascal@20543 744 sub(/\],/,"+3],",s) || sub(/,/,"+3,",s)
pascal@20458 745 print s "/16777216"; next
pascal@20458 746 }
pascal@20458 747 if (args[2] % 65536 == 0) {
pascal@20546 748 sub(/dword/,"word",s)
pascal@20543 749 sub(/\],/,"+2],",s) || sub(/,/,"+2,",s)
pascal@20458 750 print s "/65536"; next
pascal@20458 751 }
pascal@20458 752 }
pascal@20458 753 }
pascal@20458 754 if (/^ mov e.x,/) {
pascal@20458 755 split($2,args,",")
pascal@20458 756 r=args[1]
pascal@20458 757 if (args[2] == "large") { args[2] = $3 }
pascal@20458 758 if (isnum(args[2]) && args[2] % 65536 == args[2]) {
pascal@20458 759 if (args[2] % 256 == args[2] || args[2] % 256 == 0) {
pascal@20458 760 print " xor " r "," r
pascal@20458 761 if (args[2] == 0) next
pascal@20458 762 x=" mov " substr(r,2,1)
pascal@20458 763 if (args[2] % 256 == 0) {
pascal@20458 764 print x "h," args[2] "/256"
pascal@20458 765 }
pascal@20458 766 else { print x "l," args[2] }
pascal@20458 767 next
pascal@20458 768 }
pascal@20458 769 }
pascal@20458 770 }
pascal@21576 771 if (afterjmp) print ";" $0
pascal@21576 772 else print
pascal@21754 773 if (/^ jmp / || /^ call near ptr _boot_kernel/ ||
pascal@21754 774 /^ call near ptr @die$qpxzc/) afterjmp=1
pascal@20458 775 }