wok annotate linld/stuff/src/pipehole.awk @ rev 22288

linld: 8086 may load zImage (again)
author Pascal Bellard <pascal.bellard@slitaz.org>
date Wed Nov 13 15:08:02 2019 +0100 (2019-11-13)
parents e7373d3e0818
children 53c1379e13fa
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 == "tazboot.cpp") {
pascal@21984 12 if (/add si,2/) $0=" lodsw ; " $0
pascal@21984 13 if (/add si,4/) { print " lodsw"; $0=" lodsw ; " $0 }
pascal@21984 14 if (/add di,2/) $0=" scasw ; " $0
pascal@21989 15 if (/int argc/) istazboot=1
pascal@21989 16 if (istazboot == 1) {
pascal@21989 17 if (/push.*i$/) $0="; " $0
pascal@21989 18 if (/word ptr/) { istazboot=0; $0="; " $0 }
pascal@21989 19 }
pascal@21984 20 } # file == "tazboot.cpp"
pascal@21984 21 if (file == "linld.cpp") {
pascal@21984 22 if (/add si,2/) $0=" lodsw ; " $0
pascal@21984 23 if (/add di,2/) $0=" scasw ; " $0
pascal@21984 24 if (/bx,offset DGROUP:s@\+26/) sub(/mov/,";mov")
pascal@21984 25 if (islinld==1) {
pascal@21984 26 print "; " $0
pascal@21984 27 if (!/word ptr/) next
pascal@21984 28 islinld=0
pascal@21984 29 sub(/,word.*/,",di ; argv")
pascal@21984 30 if (/di,di/) { print "; " $0; next }
pascal@21984 31 }
pascal@21984 32 if (/^_main proc/) islinld=1
pascal@21984 33 if (/== 0x662F/) islinld=2
pascal@21984 34 if (islinld==2) {
pascal@21984 35 if (/cpuhaslm/) islinld=0
pascal@21984 36 if (/mov/) { print "; " $0; next }
pascal@21984 37 }
pascal@21984 38 if (/image\|initrd/) islinld=3
pascal@21984 39 if (islinld==3) {
pascal@21984 40 if (/bx,word ptr/) { islinld=0; print "; " $0; next }
pascal@21984 41 }
pascal@21984 42 if (/fileexist\$qpxzc/) islinld=4
pascal@21984 43 if (islinld==4) {
pascal@21984 44 if (/ax,-1/) print " mov bx,word ptr [si]"
pascal@21984 45 if (/ax,word ptr/) $0=" xchg ax,bx"
pascal@21984 46 if (/\[si\]$/) { islinld=0; print "; " $0; next }
pascal@21984 47 }
pascal@21984 48 } # file == "linld.cpp"
pascal@21791 49 if (file == "himem.cpp") {
pascal@21984 50 if (/void load_image/) ishimem=1
pascal@21791 51 if (ishimem == 1 && is386 == 0) {
pascal@21791 52 if (/si\+8\]$/ || /si\+4\]$/ || /si\+16\]$/) next
pascal@21791 53 if (/si\+6\]$/ || /si\+2\]$/ || /si\+14\]$/) sub(/mov dx,/,"les dx,d")
pascal@21791 54 if (/si\+12\],ax/ || /si\+16\],ax/ || /bp-2\],ax/) sub(/,ax/,",es")
pascal@21984 55 }
pascal@21984 56 if (ishimem == 1) {
pascal@21984 57 if (/do \{/) ishimem=2
pascal@21984 58 if (/byte ptr DGROUP:_vcpi,0/) print " mov bx,si"
pascal@21984 59 if (/bx,si/) next
pascal@21984 60 if (/sp,6/) {
pascal@21984 61 print " push si"
pascal@21984 62 print " push si"
pascal@21984 63 next
pascal@21984 64 }
pascal@21984 65 }
pascal@21984 66 if (ishimem == 2) {
pascal@21984 67 if (/movzx/) print " cwde"
pascal@21984 68 if (/bp-6/) next
pascal@21984 69 if (/storepage.bufv/) {
pascal@21984 70 print " inc ax"
pascal@21984 71 print " push ax"
pascal@21984 72 }
pascal@21984 73 if (/buf \+= size;/) {
pascal@21984 74 print " pop ax"
pascal@21984 75 }
pascal@21984 76 if (/Read error/) ishimem=0
pascal@21791 77 }
pascal@21791 78 } # file == "himem.cpp"
pascal@21791 79 if (file == "load.cpp") {
pascal@21998 80 if (/== 0x200/) isload=13
pascal@21998 81 if (isload == 13) { # LOAD.LST
pascal@21998 82 if (/cmp/) {
pascal@21998 83 print " mov dx,-512"
pascal@21998 84 $0=" add ax,dx"
pascal@21998 85 }
pascal@21998 86 if (/dx,-512/) {
pascal@21998 87 isload=0
pascal@21998 88 $0="; " $0
pascal@21998 89 }
pascal@21998 90 }
pascal@22152 91 if (/i\+21\],513$/) isload=11
pascal@21984 92 if (isload == 12) { # LOAD.LST
pascal@21984 93 if (/cmp/) next
pascal@21984 94 if (/jb/) isload=0
pascal@21984 95 sub(/jb/,"jcxz")
pascal@21984 96 }
pascal@21984 97 if (isload == 11) { # LOAD.LST
pascal@21984 98 if (/cmp/) {
pascal@21984 99 print " mov cx,513"
pascal@22152 100 sub(/cmp /,"sub cx,")
pascal@22152 101 sub(/,513/,"")
pascal@21984 102 }
pascal@21984 103 if (/jb/) isload=12
pascal@21984 104 sub(/jb/,"ja")
pascal@21984 105 }
pascal@22170 106 sub(/_imgs\+65534/,"_imgs-2")
pascal@22152 107 if (/m, _rm_size/) isload=10
pascal@21791 108 if (isload == 10) { # LOAD.LST
pascal@21791 109 if (/^ je /) next
pascal@21791 110 if (/ptr @die\$qpxzc/) {
pascal@21791 111 $0=" jne @die@"
pascal@21791 112 isload=0
pascal@21791 113 }
pascal@21791 114 }
pascal@21791 115 if (/setup_sects == 0/) isload=9
pascal@21791 116 if (isload == 9) { # LOAD.LST
pascal@21791 117 sub(/,0/,",al")
pascal@21791 118 if (/jne/) isload=0
pascal@21791 119 }
pascal@21784 120 if (/fallback\)\[1\] == 0/) isload=8
pascal@21784 121 if (isload == 8) { # LOAD.LST
pascal@21784 122 if (/load_image/) isload=0
pascal@21784 123 else next
pascal@21784 124 }
pascal@21757 125 if (/cmd_line_ptr =/ && is386 == 0) isload=7
pascal@21757 126 if (isload == 7) { # LOAD.LST
pascal@22181 127 if (/add/ || /xor/ || /extrn/ || /N_LXLSH@/ || /cl,4/ || /,ax/) next
pascal@22170 128 if (/enable A20 if needed/) { print nextinst; isload=0 }
pascal@22152 129 if (/i-463/) $0=" mov bx,-463"
pascal@22170 130 if (/i-465/) {
pascal@22170 131 sub(/465/,"2"); sub(/\[/,"[bx+")
pascal@22170 132 nextinst=$0; sub(/-2\],-23745/,"],8000h",nextinst)
pascal@22170 133 }
pascal@21757 134 if (/,dx/) {
pascal@21757 135 print " mov cl,12"
pascal@21757 136 print " shr ax,cl"
pascal@22181 137 print " mov bx,55"
pascal@21757 138 sub(/dx/,"ax")
pascal@21757 139 }
pascal@21757 140 }
pascal@21757 141 if (/\[0\] = m-\>fallback/) isload=6
pascal@21757 142 if (isload == 6) { # LOAD.LST
pascal@21984 143 if (/si\+2/) $0=" lodsw"
pascal@21757 144 if (/les/) sub(/bx,/,"ax,")
pascal@21757 145 if (/bx\+4/ || /es:/) {
pascal@21757 146 if (/bx\+4/) isload=0
pascal@21757 147 next
pascal@21757 148 }
pascal@21757 149 if (/si\+6/) {
pascal@21757 150 print " xchg ax,di"
pascal@21757 151 print " movsw"
pascal@21757 152 print " movsw"
pascal@21757 153 print " movsw"
pascal@21757 154 print " movsw"
pascal@21757 155 print " xchg ax,di"
pascal@21757 156 next
pascal@21757 157 }
pascal@21757 158 }
pascal@21757 159 if (/version_string = /) isload=5
pascal@21757 160 if (isload == 5) { # LOAD.LST
pascal@21757 161 sub(/ax,/,"bx,")
pascal@21757 162 if (/_version_string,/) isload=0
pascal@21757 163 if (/mov bx,ax/) next
pascal@21757 164 }
pascal@22180 165 if (/_base_himem\+2/ && is386 == 0) isload=4
pascal@22180 166 if (isload == 4) { # LOAD.LST
pascal@22180 167 if (/_base_himem\+2/) next
pascal@22180 168 if (/_base_himem$/) {
pascal@22180 169 sub(/mov dx,/,"les dx,d")
pascal@21757 170 }
pascal@21791 171 sub(/,ax/,",es")
pascal@22181 172 if (/add ax,word ptr/) $0=" add ax,cx"
pascal@22181 173 if (/i\+29\],0/) {
pascal@22181 174 sub(/,0$/,"")
pascal@22181 175 sub(/cmp /,"mov cx,")
pascal@22181 176 }
pascal@22181 177 sub(/je/,"jcxz")
pascal@22181 178 if (/@strcpy/) isload=0
pascal@21757 179 }
pascal@21754 180 if (/void load_initrd\(\)/) isload=3
pascal@21754 181 if (isload == 3) { # LOAD.LST
pascal@21754 182 if(/push di/ || /pop di/) next
pascal@21754 183 sub(/\[di/,"[bx")
pascal@21754 184 sub(/\di,/,"bx,")
pascal@21754 185 }
pascal@21750 186 if (/vid_mode = vid_mode/) isload=2
pascal@21750 187 if (isload == 2) { # LOAD.LST
pascal@21750 188 sub(/,0/,""); sub(/cmp /,"mov cx,")
pascal@21750 189 sub(/je/,"jcxz")
pascal@21750 190 if (/ax,word/) next
pascal@21750 191 sub(/,ax/,",cx")
pascal@21757 192 if (/version_string/ || /starting linux 1\.3\.73/) isload=0
pascal@21750 193 }
pascal@21791 194 if (/Not a kernel/ || /_rm_size=0x200/ || /heap_top = _rm_buf/) isload=1
pascal@21750 195 if (isload == 1) { # LOAD.LST
pascal@21791 196 if (/ptr .die\$qpxzc/) $0="@die@:\n" $0
pascal@21729 197 if (/mov al,byte ptr/ && is386) {
pascal@22152 198 sub(/mov al/,"movzx eax")
pascal@21729 199 }
pascal@21791 200 if (is386 == 0) {
pascal@22152 201 if (/m->size -= _rm_size/) print " cwd"
pascal@21791 202 sub(/,0$/,",dx")
pascal@21791 203 }
pascal@21729 204 if (/ax,word ptr/) next
pascal@21729 205 if (/^ call/) isload=0
pascal@21729 206 }
pascal@21791 207 } # file == "load.cpp"
pascal@21791 208 if (file == "iso9660.cpp") {
pascal@21791 209 if (/<< SECTORBITS/) isiso=9
pascal@21791 210 if (isiso == 9) { # ISO9660.LST
pascal@21791 211 if (/dx,/) next
pascal@21791 212 sub(/mov ax,/,"les ax,d")
pascal@21791 213 if (/^ call/) {
pascal@21791 214 print " extrn N_LXLSH@ES:near"
pascal@21791 215 sub(/N_LXLSH@/,"N_LXLSH@ES")
pascal@21791 216 isiso=0
pascal@21791 217 }
pascal@21791 218 }
pascal@21791 219 if (/filesize =/) isiso=8
pascal@21791 220 if (isiso == 8) { # ISO9660.LST
pascal@21791 221 if (/ax,/) next
pascal@21791 222 sub(/mov dx,/,"les dx,d")
pascal@21791 223 sub(/,ax/,",es")
pascal@21791 224 if (/filemod/) isiso=0
pascal@21791 225 }
pascal@21754 226 if (/CD001/) isiso=7
pascal@21754 227 if (isiso == 7) { # ISO9660.LST
pascal@21754 228 sub(/mov ax,-1/,"dec ax")
pascal@21754 229 if (/jmp/) isiso=0
pascal@21754 230 }
pascal@21754 231 if (/int len =/) isiso=6
pascal@21754 232 if (isiso == 6) { # ISO9660.LST
pascal@21754 233 if (/dx,ax/) next
pascal@21754 234 sub(/ax/,"dx")
pascal@21754 235 sub(/cx,di/,"bx,di")
pascal@21754 236 sub(/cx,dx/,"bx,ax")
pascal@21754 237 sub(/di,dx/,"di,ax")
pascal@21754 238 if (/while/) isiso=2
pascal@21754 239 }
pascal@21754 240 if (/entrysize =/) isiso=5
pascal@21754 241 if (isiso == 5) { # ISO9660.LST
pascal@21754 242 if (/ax,ax/) next
pascal@21754 243 sub(/ax/,"cx")
pascal@21754 244 sub(/je/,"jcxz")
pascal@21754 245 if (/return/) isiso=0
pascal@21754 246 }
pascal@21735 247 if (/x->curdirsize == 0xFFFF/) isiso=4
pascal@21735 248 if (isiso == 4) { # ISO9660.LST
pascal@21754 249 sub(/DGROUP:_isostate\+18/,"[si+18]")
pascal@21754 250 sub(/DGROUP:_isostate\+20/,"[si+20]")
pascal@21747 251 if (/goto restarted/) isiso=0
pascal@21735 252 }
pascal@21791 253 } # file == "iso9660.cpp"
pascal@21791 254 if (file == "iso9660.cpp" || file == "tazboot.cpp") {
pascal@21754 255 if (/do s\+\+; while/) isiso=3
pascal@21801 256 if (/for \(p = s; \*s && \*s \!=/) isiso=3 # tazboot/main
pascal@21750 257 if (isiso == 3) { # ISO9660.LST, TAZBOOT.LST
pascal@21754 258 sub(/cmp byte ptr \[.i\]/,"sub al")
pascal@21754 259 if (/mov byte ptr \[bp-5\],al/) $0=" push ax"
pascal@21754 260 if (/mov al,byte ptr \[bp-5\]/) $0=" pop ax"
pascal@21754 261 if (/inc /) { r=$2; print; next }
pascal@21754 262 if (/al,0/) print " mov al,[" r "]"
pascal@21754 263 if (/al,byte ptr/) sub(/mov/,"xchg")
pascal@21754 264 if (/byte ptr \[.*\],0/) next
pascal@21791 265 if (/jmp/) {
pascal@21791 266 print " mov bx,si"
pascal@21791 267 $0=" db 0A8h ; test al,xx instead of " $0
pascal@21791 268 }
pascal@21754 269 if (/word ptr \[bp-4\]/) next
pascal@21754 270 if (/\) s\+\+;/ || /\],-1/) isiso=0
pascal@21735 271 }
pascal@21791 272 } # file == "iso9660.cpp" || file == "tazboot.cpp"
pascal@21791 273 if (file == "iso9660.cpp") {
pascal@21735 274 if (/endname = NULL/) isiso=2
pascal@21735 275 if (isiso == 2) { # ISO9660.LST
pascal@21735 276 if (/mov bx,cx/) next
pascal@21735 277 gsub(/cx/,"bx")
pascal@21754 278 sub(/DGROUP:_isostate\+35/,"[si+35]")
pascal@21735 279 }
pascal@21735 280 if (/const char \*n = name/) isiso=1
pascal@21735 281 if (isiso == 1) { # ISO9660.LST
pascal@21735 282 if ((/mov word ptr \[si\+32\],ax/ ) ||
pascal@21754 283 (/mov ax,word ptr \[si\+2\]/) ||
pascal@21735 284 (/bx,word ptr \[si\+32\]/) || (/ax,dx/)) next
pascal@21729 285 if (/dx,/) sub(/dx/,"ax")
pascal@21754 286 if ((/sub ax,word ptr \[si\+2\]/) ||
pascal@21754 287 (/\[si\+16\]/) || (/ax,di/)) sub(/ax/,"bx")
pascal@21754 288 if (/add word ptr \[si\+32\],ax/) $0=" add bx,word ptr [si+16]"
pascal@21735 289 if (/al,/ || /,al/) sub(/al/,"cl")
pascal@21754 290 if (/cmp byte ptr \[si\+34\],0/) $0=" or cl,cl"
pascal@21735 291 if (/jne @@0$/) next
pascal@21735 292 if (/jmp @3@58$/) $0=" je @3@58"
pascal@21754 293 sub(/mov ax,-1/,"dec ax")
pascal@21754 294 }
pascal@21791 295 } # file == "iso9660.cpp"
pascal@21754 296 if (/endp/) { xlabel = ""; goto2=0 }
pascal@21801 297 if (/isoopen\(s\+7\)/ && xlabel == "") goto2=1 # tazboot/bootiso
pascal@21801 298 if (/_vid_mode,ax/ && xlabel == "") goto2=1 # tazboot/main
pascal@21801 299 if (/_initrd_name,si/ && xlabel == "") goto2=1 # tazboot/main
pascal@21801 300 if (/_base_himem\+2,/ && xlabel == "@") goto2=1 # tazboot/bootiso tazboot/main
pascal@21801 301 if (/DGROUP:_skip_alloc/ && xlabel == "@") goto2=1 # tazboot/bootiso tazboot/main
pascal@21754 302 if (/puts\(cmdline\)/ && xlabel == "@@") goto2=1
pascal@21754 303 if (goto2 == 1 && /jmp/) { # TAZBOOT.LST && LINLD.LST
pascal@21754 304 print $NF xlabel "@:"
pascal@21754 305 label=$NF
pascal@21754 306 }
pascal@21754 307 if (goto2 > 0 && label == $NF) {
pascal@21754 308 $0=$0 xlabel
pascal@21754 309 if (goto2++ == 1) xlabel=xlabel "@"
pascal@21754 310 }
pascal@21801 311 if (file == "tazboot.cpp" && /close\(x/) isotazboot=16
pascal@21801 312 if (isotazboot == 160) { # TAZBOOT.LST
pascal@21801 313 $0="; " $0
pascal@21801 314 if (/ret/) isotazboot=0
pascal@21801 315 }
pascal@21801 316 if (isotazboot == 16) { # TAZBOOT.LST
pascal@21801 317 if (/@.@/) {
pascal@21801 318 isotazboot=160
pascal@21801 319 next
pascal@21801 320 }
pascal@21801 321 }
pascal@21801 322 if (file == "tazboot.cpp" && /jne @@2/) isotazboot=15
pascal@21801 323 if (isotazboot == 15) { # TAZBOOT.LST
pascal@21801 324 if (/@.@/) {
pascal@21801 325 print " pop di"
pascal@21801 326 print " pop si"
pascal@21801 327 print " mov sp,bp"
pascal@21801 328 print " pop bp"
pascal@21801 329 print " ret"
pascal@21801 330 next
pascal@21801 331 }
pascal@21801 332 if (/skip_alloc/) isotazboot=0
pascal@21801 333 }
pascal@21791 334 if (/if\(\*s>=/) isotazboot=14
pascal@21791 335 if (isotazboot == 14) { # LINLD.LST
pascal@21791 336 if (/jmp/) {
pascal@21791 337 $0=" db 0A9h ; test ax,xxxx instead of " $0
pascal@21791 338 isotazboot=0
pascal@21791 339 }
pascal@21791 340 }
pascal@21801 341 if (file == "tazboot.cpp" && /; s \+= 4/) isotazboot=13 # tazboot/main
pascal@21791 342 if (isotazboot == 13) { # TAZBOOT.LST
pascal@21791 343 if (/si,4/) $0=" lea bx,[si+4]"
pascal@21791 344 if (/bx,si/) next
pascal@21791 345 if (/DGROUP:_topmem/ || /set_iso/) isotazboot=0
pascal@21791 346 }
pascal@21801 347 if (file == "tazboot.cpp" && /case 0x652F:/) isotazboot=12 # tazboot/main
pascal@21791 348 if (isotazboot == 12) { # TAZBOOT.LST
pascal@21791 349 sub(/si,word/,"bx,word")
pascal@21791 350 if (/short/) isotazboot=0
pascal@21791 351 }
pascal@21801 352 if (/return load_kernel/) isotazboot=11 # tazboot/isokernel
pascal@21791 353 if (isotazboot == 11) { # TAZBOOT.LST
pascal@21791 354 sub(/call/,"jmp")
pascal@21791 355 if (/ret/ || /pop/) next
pascal@21791 356 if (/endp/) isotazboot=0
pascal@21791 357 }
pascal@21801 358 if (/cmdline=s\+=3/ || /magic \!= 0/ || /&root_dev =/) { isotazboot=10; j="" } # ,tazboot/bootiso,tazboot/main
pascal@21754 359 if (isotazboot == 10) { # TAZBOOT.LST && LINLD.LST
pascal@21754 360 if (/je/ || /jne/) { j=$1; next }
pascal@21754 361 if (/jmp/) {
pascal@21754 362 if (j=="jne") sub(/jmp/,"je")
pascal@21754 363 else if (j=="je") sub(/jmp/,"jne")
pascal@21754 364 isotazboot=0
pascal@21754 365 }
pascal@21754 366 }
pascal@21801 367 if (/static const unsigned long initrddesc = 18L/) isotazboot=9 # tazboot/bootiso
pascal@21754 368 if (isotazboot == 9) { # TAZBOOT.LST
pascal@21754 369 if (/,0/) {
pascal@21754 370 split($4,y,",")
pascal@21754 371 print " mov bx,offset " y[1]
pascal@21801 372 sub(/DGROUP:.*,/,"[bx],")
pascal@21754 373 }
pascal@21801 374 if (/mov/ && $3 == y[1]) next
pascal@21801 375 if (/je/) next
pascal@21801 376 if (/jmp/) sub(/jmp/,"jne")
pascal@21801 377 sub(/ax,offset/,"bx,offset")
pascal@21801 378 if (/bx,ax/) { isotazboot=0; next }
pascal@21729 379 }
pascal@21801 380 if (/isoopen\(s\+7\) != -1/) isotazboot=8 # tazboot/bootiso
pascal@21750 381 if (isotazboot == 8) { # TAZBOOT.LST
pascal@21801 382 sub(/\[bx/,"[si")
pascal@21801 383 if (/bx,si/) next
pascal@21750 384 if (/magic/) isotazboot=0
pascal@21750 385 }
pascal@21801 386 if (/isoopen\(\"bzImage\"\)/) isotazboot=7 # tazboot/bootiso
pascal@21750 387 if (isotazboot == 7) { # TAZBOOT.LST
pascal@21791 388 if (/inc/ || /,al/) next
pascal@21791 389 if (/al,byte/) sub (/mov al,/,"inc ")
pascal@21750 390 if (/isokernel/) isotazboot=0
pascal@21750 391 }
pascal@21801 392 if (/if \(c\) s\+\+;/) isotazboot=6 # tazboot/main
pascal@21750 393 if (isotazboot == 6) { # TAZBOOT.LST
pascal@21750 394 if (/cmp/) {
pascal@21750 395 $0=" cmp al,0"
pascal@21750 396 isotazboot=0
pascal@21750 397 }
pascal@21750 398 }
pascal@21801 399 if (/static void next_chunk/) isotazboot=5 # tazboot/next_chunk
pascal@21791 400 if (isotazboot == 501) {
pascal@21791 401 if (/ret/) {
pascal@21791 402 print "@1@86:"
pascal@21791 403 isotazboot=0
pascal@21791 404 }
pascal@21791 405 }
pascal@21754 406 if (isotazboot == 5 || isotazboot == 500) { # TAZBOOT.LST
pascal@21750 407 if (/cx,ax/) $0=" xchg ax,bx"
pascal@21754 408 if (/ax,word ptr \[si\+28\]/ && isotazboot == 500) next
pascal@21750 409 if (/bx,cx/) next
pascal@21754 410 if (/push/ || /pop/ || /bp,sp/ || /si,/) next
pascal@21754 411 sub(/\[si/,"[di")
pascal@21754 412 if (/initrd_info/) isotazboot=500
pascal@21791 413 if (/bx\+6\]/) next
pascal@21791 414 if (/bx\+4\]/) sub(/mov dx,/,"les dx,d")
pascal@21791 415 sub(/di\+24\],ax/,"di+24],es")
pascal@21791 416 sub(/call/,"jmp")
pascal@21791 417 if (/ret/ || /pop/ || /^@1@86:/) next
pascal@21791 418 if (/_isostate\+14/) next
pascal@21791 419 if (/_isostate\+12/) {
pascal@21791 420 sub(/mov ax,/,"les ax,d")
pascal@21791 421 print
pascal@21791 422 print " mov dx,es"
pascal@21791 423 next
pascal@21791 424 }
pascal@21791 425 if (/ax,-4/) isotazboot++
pascal@21750 426 }
pascal@21801 427 if (/0x7FF0/) isotazboot=4 # tazboot/bootiso
pascal@21750 428 if (isotazboot == 4) { # TAZBOOT.LST
pascal@21750 429 if (/ax,word ptr/) {
pascal@21750 430 print " mov ax,32752"
pascal@21754 431 print " cwd"
pascal@21750 432 sub(/mov/,"sub")
pascal@21750 433 }
pascal@21750 434 if (/bx,/ || /cx,/ || /dx,/) next
pascal@21754 435 sub(/,0/,",dx")
pascal@21754 436 sub(/,bx/,",dx")
pascal@21750 437 sub(/,cx/,",ax")
pascal@21754 438 if (/@addinitrd\$qv/) isotazboot=0
pascal@21750 439 }
pascal@21801 440 if (/c = x->filename/) isotazboot=3 # tazboot/bootiso
pascal@21750 441 if (isotazboot == 3) { # TAZBOOT.LST
pascal@21750 442 if (/ax,/) $0=" xchg ax,bx"
pascal@21750 443 if (/\]$/) next
pascal@21750 444 if (/@strcpy\$qpxzct1/) isotazboot=0
pascal@21750 445 }
pascal@21801 446 if (/base_himem = memtop/) isotazboot=2 # tazboot/bootiso
pascal@21750 447 if (isotazboot == 2) { # TAZBOOT.LST
pascal@21801 448 if (/word ptr \[si\+2\],0/) {
pascal@21754 449 print s; hold=0
pascal@21801 450 print " mov bx,word ptr [si+2]"
pascal@21752 451 $0=" or bx,bx"
pascal@21752 452 }
pascal@21752 453 if (/\[bp-4\],ax/) sub(/ax/,"bx")
pascal@21801 454 if (/ax,word ptr \[si\+2\]/ || /bx,ax/) next
pascal@21791 455 if (/_base_himem\+2,dx/) {
pascal@21791 456 print " mov bx,offset DGROUP:_base_himem+2"
pascal@21791 457 }
pascal@21791 458 sub(/DGROUP:_base_himem,/,"[bx-2],")
pascal@21791 459 sub(/DGROUP:_base_himem\+2,/,"[bx],")
pascal@21791 460 sub(/DGROUP:_base_himem\+3,/,"[bx+1],")
pascal@21750 461 if (/@strcmp\$qpxzct1/) isotazboot=0
pascal@21750 462 }
pascal@21801 463 if (/static void addinitrd/) isotazboot=100 # tazboot/addinitrd
pascal@21751 464 if (isotazboot == 100) { # TAZBOOT.LST
pascal@21751 465 if (/cx,ax/) {
pascal@21754 466 print " mov si,offset _isostate+8"
pascal@21757 467 print " push ds"
pascal@21757 468 print " pop es"
pascal@21754 469 print " xchg ax,di"
pascal@21751 470 print " movsw"
pascal@21751 471 print " movsw"
pascal@21751 472 print " movsw"
pascal@21751 473 print " movsw"
pascal@21754 474 $0=" xchg ax,di"
pascal@21751 475 }
pascal@21751 476 if (/mov/ && !/si/ && !/cl/) next
pascal@21754 477 if (/void load_initrds/) isotazboot=101
pascal@21751 478 }
pascal@21754 479 if (isotazboot == 101 || isotazboot == 102) { # TAZBOOT.LST
pascal@21754 480 sub(/\[si/,"[di"); sub(/si,/,"di,"); sub(/si$/,"di")
pascal@21754 481 sub(/DGROUP:_imgs\+38$/,"[di+38-32]")
pascal@21754 482 sub(/DGROUP:_imgs\+40$/,"[di+40-32]")
pascal@21754 483 if (/isofd/) isotazboot=102
pascal@21754 484 if (/push/ && isotazboot == 102) next
pascal@21754 485 if (/pop/ && isotazboot == 102) next
pascal@21754 486 if (/load_initrd/) isotazboot=101
pascal@21754 487 if (/isokernel/) isotazboot=103
pascal@21754 488 }
pascal@21754 489 if (isotazboot > 102) { # TAZBOOT.LST
pascal@21754 490 if (/push/ || /pop/) next
pascal@21754 491 sub(/\[si/,"[bx")
pascal@21750 492 sub(/si,/,"bx,")
pascal@21750 493 if (/static void bootiso/) isotazboot=0
pascal@21750 494 }
pascal@21729 495 if (wascall) {
pascal@21729 496 if (rcall != "") {
pascal@21729 497 if (/,ax$/) print " mov " rcall ",ax"
pascal@21729 498 else print " xchg ax," rcall
pascal@21729 499 wascall=0
pascal@21729 500 }
pascal@21729 501 else if (/^ mov .i,ax$/) {
pascal@21729 502 split($2,y,",")
pascal@21729 503 rcall=y[1]
pascal@21729 504 next
pascal@21729 505 }
pascal@21729 506 else wascall=0
pascal@21729 507 }
pascal@21729 508 if (/^ call /) { wascall=1; rcall="" }
pascal@20458 509 if (hold == 0) {
pascal@20458 510 s=$0
pascal@20534 511 if (/^ mov .[ix],bx$/ || /^ mov .[ix],.i$/) {
pascal@20543 512 r=$2; kept=0
pascal@20458 513 hold=1; split($2,regs,","); next
pascal@20458 514 }
pascal@21729 515 if (/^ inc e?.[ixhl]/ || /^ dec e?.[ixhl]/) {
pascal@20458 516 hold=2; r=$2; next
pascal@20458 517 }
pascal@20458 518 if (/^ mov [abcds][ix],/ && ! /,.s/) {
pascal@20458 519 hold=3; split($2,regs,","); next
pascal@20458 520 }
pascal@20458 521 if (/^ movzx eax,ax$/) { hold=4; next }
pascal@20544 522 if (/^ cmp word ptr/ || /^ cmp [bcd]x,/) {
pascal@20543 523 split($0,regs,",")
pascal@20543 524 if (isnum(regs[2]) && regs[2] != 0 &&
pascal@20543 525 (regs[2] % 256) == 0) {
pascal@20549 526 hold=5; next
pascal@20543 527 }
pascal@20543 528 }
pascal@20630 529 if (/^ mov ax,cs$/) { hold=6; kept=0; next }
pascal@20630 530 if (/^ mov cl,4$/) { hold=7; next }
pascal@20630 531 if (/^ cmp word ptr DGROUP:.*,0$/) {
pascal@20630 532 hold=8; split($2,regs,","); next
pascal@20630 533 }
pascal@20634 534 if (/^ cbw/) { hold=11; kept=0; next }
pascal@20634 535 if (/^ add [abcds][ix],2$/) {
pascal@20634 536 split($2,regs,","); hold=12; next
pascal@20634 537 }
pascal@20634 538 if (/^ sub [abcds][ix],2$/) {
pascal@20634 539 split($2,regs,","); hold=13; next
pascal@20634 540 }
pascal@21569 541 if (/^ push dx$/) {
pascal@21569 542 hold=14; next;
pascal@21569 543 }
pascal@20458 544 }
pascal@20458 545 else if (hold == 1) {
pascal@20543 546 if (/^ ;/) { line[kept++]=$0; next }
pascal@20458 547 hold=0; split($2,args,","); op=""
pascal@20458 548 if ($1 == "add") op="+"
pascal@20458 549 if ($1 == "sub") op="-"
pascal@20751 550 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 551 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20543 552 if (op != "" && regs[1] == args[1]) {
pascal@20543 553 if (isnum(args[2])) {
pascal@20630 554 for (i = kept++; i > 0; i--) line[i] = line[i-1]
pascal@20630 555 line[0] = "\tlea\t" regs[1] ",[" regs[2] op args[2] "]"
pascal@22288 556 sub(/\+-/,"-",line[0])
pascal@20630 557 hold=10; next
pascal@20543 558 }
pascal@20543 559 line[kept++]=$0
pascal@20543 560 hold=1
pascal@20458 561 next
pascal@20458 562 }
pascal@20520 563 if (/^ pop [ds]i/ && regs[2] ~ /^[ds]i$/) {
pascal@20520 564 print " xchg " r
pascal@20520 565 }
pascal@20543 566 else print s
pascal@20543 567 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20458 568 }
pascal@20458 569 else if (hold == 2) {
pascal@21729 570 split($0,args,",")
pascal@21729 571 if (/^ mov / && r == args[2]) { print s; s=$0; next }
pascal@21729 572 split($2,args,",")
pascal@21729 573 hold=0; print s
pascal@20458 574 if ($1 == "or" && r == args[1] && r == args[2]) next # don't clear C ...
pascal@20458 575 }
pascal@20458 576 else if (hold == 3) {
pascal@20458 577 hold=0
pascal@21576 578 if (/^ call / && regs[2] == "ax") s=" xchg ax," regs[1]
pascal@20542 579 if (/^ add [abcds][ix],/) {
pascal@20458 580 split($2,regs2,",")
pascal@20458 581 if (regs[1] == regs2[1] && (regs2[2] == "offset" || isnum(regs2[2]))) {
pascal@20549 582 t=$0; sub(/mov/,$1,s); sub(/add/,"mov",t)
pascal@20458 583 print t; print s; next
pascal@20458 584 }
pascal@20458 585 }
pascal@20458 586 print s
pascal@20458 587 }
pascal@20458 588 else if (hold == 4) {
pascal@20458 589 hold=0
pascal@20458 590 if (/^ push eax$/) {
pascal@20458 591 print " push 0"; print " push ax"; next
pascal@20458 592 } else { print s }
pascal@20458 593 }
pascal@20543 594 else if (hold == 5) {
pascal@20543 595 hold=0
pascal@20543 596 if ($1 == "jae" || $1 == "jb") {
pascal@20544 597 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 598 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20543 599 s = s "/256"
pascal@20543 600 }
pascal@20543 601 print s
pascal@20543 602 }
pascal@20630 603 else if (hold == 6) {
pascal@20630 604 if (($1 == "and" || $1 == "add") && $2 ~ /^ax,/) {
pascal@20630 605 line[kept++]=$0
pascal@20630 606 next
pascal@20630 607 }
pascal@20630 608 p=$0
pascal@20630 609 if (/^ movzx eax,ax$/) {
pascal@20630 610 s=" mov eax,cs"; p=""
pascal@20630 611 }
pascal@20630 612 print s
pascal@20630 613 for (i = 0; i < kept; i++) print line[i]; kept=0
pascal@20630 614 if (p != "") print p
pascal@20630 615 hold=0; next
pascal@20630 616 }
pascal@20630 617 else if (hold == 7) {
pascal@20458 618 hold=0
pascal@20520 619 if (/^ call near ptr N_LXURSH@$/) {
pascal@20520 620 print " extrn N_LXURSH@4:near"
pascal@20520 621 print " call near ptr N_LXURSH@4"
pascal@20520 622 next
pascal@20520 623 }
pascal@20528 624 if (/^ call near ptr N_LXLSH@$/) {
pascal@20528 625 print " extrn N_LXLSH@4:near"
pascal@20528 626 print " call near ptr N_LXLSH@4"
pascal@20528 627 next
pascal@20528 628 }
pascal@20520 629 print s
pascal@20458 630 }
pascal@20630 631 else if (hold == 8) {
pascal@20630 632 if ($1 == "je" || $1 == "jne") { p=$0; hold=9; next }
pascal@20630 633 hold=0
pascal@20630 634 print s
pascal@20630 635 }
pascal@20630 636 else if (hold == 9) {
pascal@20630 637 hold=0; split($2,args,",")
pascal@20630 638 if (/^ mov ax,/ && args[2] == regs[1]) {
pascal@20630 639 print; print " or ax,ax"; print p; next
pascal@20630 640 }
pascal@20630 641 print s; print p;
pascal@20630 642 }
pascal@20630 643 else if (hold == 10) {
pascal@20751 644 split($2,args,","); op=""
pascal@20751 645 if ($1 == "add") op="+"
pascal@20751 646 if ($1 == "sub") op="-"
pascal@20751 647 if ($1 == "inc") { op="+"; args[2]="1"; }
pascal@20751 648 if ($1 == "dec") { op="-"; args[2]="1"; }
pascal@20751 649 if (op != "" && isnum(args[2])) {
pascal@20751 650 split(line[0],reg,",")
pascal@20751 651 if (substr(reg[1],length(reg[1])-1,2) == args[1]) {
pascal@20751 652 line[0] = substr(line[0],1,length(line[0])-1) op args[2] "]"
pascal@20751 653 next
pascal@20751 654 }
pascal@20751 655 }
pascal@20630 656 hold=0
pascal@20630 657 if (/^ mov [sd]i,ax$/) {
pascal@20630 658 split($2,args,",")
pascal@20630 659 for (i = 0; i < kept; i++) {
pascal@20630 660 sub(/ax/,args[1],line[i]); print line[i]
pascal@20630 661 }
pascal@20630 662 next
pascal@20630 663 }
pascal@20630 664 for (i = 0; i < kept; i++) print line[i]
pascal@20630 665 }
pascal@20634 666 else if (hold == 11) {
pascal@20634 667 if (/^ inc ax$/ || /^ dec ax$/) {
pascal@20634 668 line[kept++]=$0; next
pascal@20634 669 }
pascal@20634 670 split($2,args,",")
pascal@20634 671 if (/^ mov cl,/) {
pascal@20634 672 split($2,args,",")
pascal@20634 673 if (args[2] >= 8) {
pascal@20634 674 line[kept++]=$0; next
pascal@20634 675 }
pascal@20634 676 }
pascal@20634 677 if (!/^ shl ax,/ || (args[2] != "cl" && args[2] < 8)) {
pascal@20634 678 print " cbw "
pascal@20634 679 }
pascal@20634 680 for (i = 0; i < kept; i++) print line[i]
pascal@20634 681 hold=kept=0
pascal@20634 682 }
pascal@20634 683 else if (hold == 12) {
pascal@20634 684 hold=0
pascal@20634 685 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 686 print " inc " regs[1]
pascal@20634 687 print " inc " regs[1]
pascal@20634 688 }
pascal@20634 689 else print " add " regs[1] ",2"
pascal@20634 690 }
pascal@20634 691 else if (hold == 13) {
pascal@20634 692 hold=0
pascal@20634 693 if ($1 != "adc" && $1 != "sbb" && ! /^ jn?[abc]/) {
pascal@20634 694 print " dec " regs[1]
pascal@20634 695 print " dec " regs[1]
pascal@20634 696 }
pascal@20634 697 else print " sub " regs[1] ",2"
pascal@20634 698 }
pascal@21569 699 else if (hold == 14) {
pascal@21569 700 if (/^ push ax$/) { hold++; next; }
pascal@21569 701 print " push dx";
pascal@21569 702 hold=0;
pascal@21569 703 }
pascal@21569 704 else if (hold == 15) {
pascal@21569 705 if (/^ pop eax$/) { hold++; next; }
pascal@21569 706 print " push dx";
pascal@21569 707 print " push ax";
pascal@21569 708 hold=0;
pascal@21569 709 }
pascal@21569 710 else if (hold == 16) {
pascal@21569 711 hold=0;
pascal@21569 712 if (/^ shr eax,16$/) { print " xchg ax,dx"; next; }
pascal@21569 713 print " push dx";
pascal@21569 714 print " push ax";
pascal@21569 715 print " pop eax";
pascal@21569 716 }
pascal@21569 717 else if (hold == 17) {
pascal@21569 718 hold=0;
pascal@21569 719 if (/^ cmp ax,-1$/) { print " inc ax"; next; }
pascal@21569 720 }
pascal@21576 721 if (/^ call near ptr @fileexist\$/ || # return boolean :
pascal@21576 722 /^ call near ptr @isoreaddir\$/ || # 0=true, -1=false
pascal@21628 723 /^ call near ptr @isoreset\$/ ||
pascal@21628 724 /^ call near ptr @isoopen\$/ ||
pascal@21628 725 /^ call near ptr @isoreadsector\$/ ||
pascal@21628 726 /^ call near ptr @strhead\$/ ||
pascal@21576 727 /^ call near ptr @argstr\$/ ||
pascal@21576 728 /^ call near ptr @argnum\$/) { print; hold=17; next; }
pascal@20458 729 s=$0
pascal@20458 730 # These optimisation may break ZF or CF
pascal@20485 731 if (/^ sub sp,2$/) { print " push ax"; next }
pascal@20485 732 if (/^ sub sp,4$/) { print " push ax"; print " push ax"; next }
pascal@20485 733 if (/^ add sp,4$/) { print " pop cx"; print " pop cx"; next }
pascal@20458 734 if (/^ mov d*word ptr .*,0$/ || /^ mov dword ptr .*,large 0$/) {
pascal@20458 735 sub(/mov/,"and",s); print s; next # slower
pascal@20458 736 }
pascal@20458 737 if (/^ mov d*word ptr .*,-1$/ || /^ mov dword ptr .*,large -1$/) {
pascal@20458 738 sub(/mov/,"or",s); print s; next # slower
pascal@20458 739 }
pascal@20458 740 if (/^ or .*,0$/ || /^ and .*,-1$/) next
pascal@20458 741 if (/^ or [abcd]x,/) {
pascal@20458 742 split($2,args,",")
pascal@20458 743 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 744 print " or " substr(args[1],1,1) "l," args[2]; next
pascal@20458 745 }
pascal@20458 746 }
pascal@20458 747 if (/^ and [abcd]x,/) {
pascal@20458 748 split($2,args,",")
pascal@20459 749 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 750 print " and " substr(args[1],1,1) "l," args[2]; next
pascal@20458 751 }
pascal@20458 752 }
pascal@20458 753 if (/^ or e[abcd]x,/) {
pascal@20458 754 split($2,args,",")
pascal@20458 755 if (args[2] == "large") { args[2] = $3 }
pascal@20458 756 if (isnum(args[2]) && args[2] >= 0 && args[2] < 256) {
pascal@20458 757 print " or " substr(args[1],2,1) "l," args[2]; next
pascal@20458 758 }
pascal@20458 759 }
pascal@20458 760 if (/^ and e[abcd]x,/) {
pascal@20458 761 split($2,args,",")
pascal@20458 762 if (args[2] == "large") { args[2] = $3 }
pascal@20459 763 if (isnum(args[2]) && args[2] >= -256 && args[2] < 0) {
pascal@20458 764 print " and " substr(args[1],2,1) "l," args[2]; next
pascal@20458 765 }
pascal@20458 766 }
pascal@20458 767 if (/^ or e[abcds][ix],/) {
pascal@20458 768 split($2,args,",")
pascal@20458 769 if (args[2] == "large") { args[2] = $3 }
pascal@20458 770 if (isnum(args[2]) && args[2] >= 0 && args[2] < 65536) {
pascal@20458 771 print " or " substr(args[1],2) "," args[2]; next
pascal@20458 772 }
pascal@20458 773 }
pascal@20458 774 if (/^ and e[abcds][ix],/) {
pascal@20458 775 split($2,args,",")
pascal@20458 776 if (args[2] == "large") { args[2] = $3 }
pascal@20459 777 if (isnum(args[2]) && args[2] >= -65536 && args[2] < 0) {
pascal@20458 778 print " and " substr(args[1],2) "," args[2]; next
pascal@20458 779 }
pascal@20458 780 }
pascal@20543 781 if (/^ add word ptr/ || /^ sub word ptr/ ||
pascal@20544 782 /^ add [bcd]x,/ || /^ sub [bcd]x,/) {
pascal@20542 783 split($0,args,",")
pascal@20542 784 if (isnum(args[2]) && (args[2] % 256 == 0)) {
pascal@20544 785 sub(/word ptr/,"byte ptr",s); sub(/x,/,"h,",s) ||
pascal@20543 786 sub(/\],/,"+1],",s) || sub(/,/,"+1,",s)
pascal@20542 787 print s "/256"; next
pascal@20542 788 }
pascal@20542 789 }
pascal@20546 790 if (/^ add dword ptr/ || /^ sub dword ptr/) {
pascal@20458 791 split($0,args,",")
pascal@20543 792 if (args[2] == "large") { args[2] = $3 }
pascal@20458 793 if (isnum(args[2])) {
pascal@20546 794 if (args[2] % 16777216 == 0) {
pascal@20546 795 sub(/dword/,"byte",s)
pascal@20543 796 sub(/\],/,"+3],",s) || sub(/,/,"+3,",s)
pascal@20458 797 print s "/16777216"; next
pascal@20458 798 }
pascal@20458 799 if (args[2] % 65536 == 0) {
pascal@20546 800 sub(/dword/,"word",s)
pascal@20543 801 sub(/\],/,"+2],",s) || sub(/,/,"+2,",s)
pascal@20458 802 print s "/65536"; next
pascal@20458 803 }
pascal@20458 804 }
pascal@20458 805 }
pascal@20458 806 if (/^ mov e.x,/) {
pascal@20458 807 split($2,args,",")
pascal@20458 808 r=args[1]
pascal@20458 809 if (args[2] == "large") { args[2] = $3 }
pascal@20458 810 if (isnum(args[2]) && args[2] % 65536 == args[2]) {
pascal@20458 811 if (args[2] % 256 == args[2] || args[2] % 256 == 0) {
pascal@20458 812 print " xor " r "," r
pascal@20458 813 if (args[2] == 0) next
pascal@20458 814 x=" mov " substr(r,2,1)
pascal@20458 815 if (args[2] % 256 == 0) {
pascal@20458 816 print x "h," args[2] "/256"
pascal@20458 817 }
pascal@20458 818 else { print x "l," args[2] }
pascal@20458 819 next
pascal@20458 820 }
pascal@20458 821 }
pascal@20458 822 }
pascal@21576 823 if (afterjmp) print ";" $0
pascal@21576 824 else print
pascal@21754 825 if (/^ jmp / || /^ call near ptr _boot_kernel/ ||
pascal@21754 826 /^ call near ptr @die$qpxzc/) afterjmp=1
pascal@20458 827 }