wok-6.x annotate linld/stuff/src/JUMP.ASM @ rev 20481

upx: patch checkDefaultCompressionRatio()
author Pascal Bellard <pascal.bellard@slitaz.org>
date Thu Oct 18 22:26:36 2018 +0200 (2018-10-18)
parents cd2def637347
children 71d2f2304826
rev   line source
pascal@19515 1 ;***************************************************************
pascal@19515 2 ;****** This file is distributed under GPL
pascal@19515 3 ;***************************************************************
pascal@19515 4 ideal
pascal@19515 5 %crefref
pascal@19515 6 %noincl
pascal@19515 7 %nomacs
pascal@19636 8 ifdef NO386
pascal@19636 9 p8086
pascal@19636 10 else
pascal@19515 11 p386
pascal@19636 12 endif
pascal@19515 13
pascal@19903 14 group DGROUP _TEXT,_DATA,_BSS
pascal@19515 15 assume cs:DGROUP,ds:DGROUP
pascal@19515 16
pascal@19903 17 segment _DATA byte public use16 'DATA'
pascal@19903 18
pascal@19903 19 overflow db "Loaded too close to 9000:0",0
pascal@19903 20
pascal@19903 21 ends _DATA
pascal@19903 22
pascal@19515 23 segment _BSS byte public use16 'BSS'
pascal@19515 24
pascal@19899 25 global _imgs:dword
pascal@19515 26
pascal@19515 27 ends _BSS
pascal@19515 28
pascal@19515 29
pascal@19515 30 segment _TEXT byte public use16 'CODE'
pascal@19515 31
pascal@19905 32 ;***************************************************************
pascal@20473 33 ;void dos_shutdown()
pascal@20473 34 ;***************************************************************
pascal@20473 35
pascal@20473 36 macro dos_shutdown
pascal@20481 37 xor di,di
pascal@20481 38 mov ds,di
pascal@20473 39 ifndef NO386
pascal@20481 40 push [dword di+4] ; save step
pascal@20481 41 mov [word di+4],offset step19
pascal@20473 42 else
pascal@20473 43 mov ax,offset step19
pascal@20481 44 xchg ax,[word di+4]
pascal@20481 45 push [word di+6]
pascal@20473 46 push ax ; save step
pascal@20473 47 endif
pascal@20473 48 mov [word cs:sssp],sp
pascal@20481 49 ;cmp [byte di+7],0F0h
pascal@20473 50 ;jnc notdos
pascal@20481 51 mov [di+6],cs
pascal@20473 52 pushf
pascal@20473 53 pushf
pascal@20473 54 pop ax
pascal@20473 55 inc ah ; set TF
pascal@20473 56 push ax
pascal@20473 57 popf
pascal@20481 58 call [dword di+4*19h]
pascal@20473 59 notdos:
pascal@20473 60 ifndef NO386
pascal@20473 61 lss sp,[dword cs:sssp]
pascal@20473 62 else
pascal@20473 63 lds ax,[dword cs:sssp]
pascal@20473 64 push ds
pascal@20473 65 pop ss
pascal@20473 66 xchg ax,sp
pascal@20473 67 endif
pascal@20481 68 xor di,di
pascal@20481 69 mov ds,di
pascal@20473 70 ifndef NO386
pascal@20481 71 pop [dword di+4] ; restore step
pascal@20473 72 else
pascal@20481 73 pop [word di+4] ; restore step
pascal@20481 74 pop [word di+6]
pascal@20473 75 endif
pascal@20473 76 endm
pascal@20473 77 macro step19code
pascal@20473 78 step19:
pascal@20481 79 push di
pascal@20473 80 push ds
pascal@20481 81 mov di,sp
pascal@20481 82 lds di,[dword ss:di+4] ; read cs:ip
pascal@20481 83 cmp [word di],19CDh ; int 19h ?
pascal@20473 84 pop ds
pascal@20481 85 pop di
pascal@20473 86 je notdos
pascal@20473 87 iret
pascal@20473 88 endm
pascal@20473 89
pascal@20473 90
pascal@20473 91 ;***************************************************************
pascal@19905 92 ;void boot_kernel();
pascal@19905 93 ;****** Never returns
pascal@19905 94 ;***************************************************************
pascal@19903 95 global _boot_kernel:near
pascal@19905 96 proc _boot_kernel near
pascal@19905 97
pascal@20142 98 p8086
pascal@19903 99 extrn _heap_top:word
pascal@20475 100 global sssp
pascal@19903 101 ifdef NO386
pascal@20475 102 sssp:
pascal@19903 103 extrn _topseg:near
pascal@19903 104 call near _topseg
pascal@20475 105 mov [word sssp+2],ax
pascal@19903 106 xchg ax,bx
pascal@20473 107 mov ax,[_heap_top]
pascal@19903 108 mov cl,4
pascal@19903 109 shr ax,cl
pascal@19903 110 else
pascal@20142 111 p386
pascal@20473 112 mov ax,[_heap_top]
pascal@20475 113 ;shr ax,4
pascal@20475 114 db 0C1h,0E8h
pascal@20475 115 sssp:
pascal@20475 116 db 4
pascal@20475 117 mov bx,9000h
pascal@19903 118 endif
pascal@20473 119 mov es,bx
pascal@19903 120 mov dx,cs
pascal@19903 121 add ax,dx
pascal@19903 122 cmp ax,bx
pascal@19905 123 jb @@nooverflow
pascal@19903 124 ; Oops! We can stomp on our toes... better stop now
pascal@19903 125 mov bx,offset overflow
pascal@19903 126 extrn die:near
pascal@20427 127 call near die
pascal@19905 128 @@nooverflow:
pascal@20473 129 ;cli ; we start doing destructive things to DOS
pascal@19571 130 push es
pascal@19571 131 pop ss
pascal@19571 132 mov sp,0A000h
pascal@19900 133 extrn _csip:dword
pascal@19900 134 push [dword _csip]
pascal@19636 135 extrn _rm_size:word
pascal@19636 136 mov si,offset _rm_size ; _rm_size, _pm_high, _rm_buf
pascal@19636 137 lodsw
pascal@19636 138 xchg ax,cx ; _rm_size
pascal@19636 139 lodsb ; _pm_high
pascal@19636 140 mov si,[si] ; _rm_buf
pascal@19571 141 xor di,di
pascal@19571 142 ;cld
pascal@19571 143 rep
pascal@19571 144 movsb
pascal@19571 145 extrn _cmdline:word
pascal@19571 146 mov si,[_cmdline]
pascal@19571 147 mov di,8000h
pascal@19571 148 mov ch,10h ; 4k
pascal@19571 149 rep
pascal@19571 150 movsb
pascal@20481 151 ifdef NO386
pascal@20481 152 add bh,9
pascal@20481 153 endif
pascal@19636 154 cmp al,cl ; load high ?
pascal@20473 155 ifdef noelks
pascal@19905 156 jne @@isbzimage
pascal@20473 157 else
pascal@20473 158 jne @@isbzimagez
pascal@20473 159 endif
pascal@19637 160 ifdef NO386
pascal@19637 161 push bx ; topseg()+0x0900
pascal@19637 162 else
pascal@19905 163 push 9800h+(4096/16) ; 4096 bytes for cmdline
pascal@19637 164 endif
pascal@19515 165 ; finish loading
pascal@19515 166 extrn @last_ditch$qv:near
pascal@19515 167 push cs
pascal@19515 168 call @last_ditch$qv
pascal@19515 169 ; self move
pascal@19571 170 ;cld
pascal@19538 171 pop es ; min 2048 bytes for stack
pascal@20481 172 mov cx,offset movedend
pascal@19538 173 xor si,si ; A000 -9000 -0800(>movedend)
pascal@19515 174 xor di,di ; set ZF
pascal@19515 175 rep
pascal@19515 176 movsb
pascal@20477 177 mov ax,[word _imgs+2+2] ; get pm->fallback high word
pascal@20477 178
pascal@20477 179 ; prepare memcpy32 size & srcofs param to move zImage pm
pascal@20477 180 mov dx,8
pascal@20477 181 cmp ax,dx ; buf > 80000h ?
pascal@20477 182 ja @@bufhigh
pascal@20477 183 sub dx,ax
pascal@20477 184 inc dx ; up to 90000h-1
pascal@20477 185 @@bufhigh:
pascal@20477 186 push dx ; size hi
pascal@20477 187 push cx ; size lo=up to 512k
pascal@20477 188 push ax ; src ofs ho = pm.fallback
pascal@20477 189
pascal@19515 190 push es
pascal@20481 191 dos_shutdown ; clear di
pascal@20475 192 call near @@isbzimage ; pop cs ; ds=es=ss
pascal@19538 193 ;in al,70h
pascal@19538 194 ;or al,80h ; disable NMI
pascal@19538 195 ;out 70h,al
pascal@20477 196
pascal@20481 197 push di ; src ofs lo
pascal@20481 198 push di ; src seg=0
pascal@19636 199 ifdef NO386
pascal@20481 200 inc di
pascal@20481 201 push di ; dst ofs hi
pascal@20481 202 dec di
pascal@19636 203 else
pascal@20477 204 push 1 ; dst ofs hi
pascal@19636 205 endif
pascal@20481 206 push di ; dst ofs lo : 64k
pascal@19515 207 extrn _memcpy32:near
pascal@19515 208 call _memcpy32
pascal@19538 209 add sp,14
pascal@19515 210
pascal@19515 211 ifndef noelks
pascal@19515 212 ifndef NO386
pascal@19515 213 cmp [dword 1E6h],'SKLE'
pascal@20473 214 jne @@notelks
pascal@20481 215 xor si,si
pascal@19515 216 else
pascal@20481 217 mov si,1E6h
pascal@20481 218 lodsw
pascal@20481 219 cmp ax,'LE'
pascal@19905 220 jne @@notelks
pascal@20481 221 lodsw
pascal@20481 222 xor ax,'SK'
pascal@20473 223 jne @@notelks
pascal@20481 224 xchg ax,si
pascal@19515 225 endif
pascal@20481 226 push es
pascal@20481 227 pop ss
pascal@20481 228 mov cx,120h ; CS=0120
pascal@20481 229 push cx
pascal@20481 230 push si ; IP=0000
pascal@20481 231 mov cl,0 ; DS=ES=SS=0100
pascal@20475 232 mov es,cx
pascal@20475 233 mov ch,05h ; 500h mini
pascal@19515 234 rep
pascal@20481 235 @@isbzimagez:
pascal@19515 236 movsw
pascal@19905 237 @@notelks:
pascal@19515 238 endif
pascal@19905 239 @@isbzimage:
pascal@19515 240 push ss
pascal@19515 241 pop ds
pascal@20475 242 push ss
pascal@20475 243 pop es
pascal@19636 244 ifndef NO386
pascal@19515 245 push ss
pascal@19515 246 pop fs
pascal@19515 247 push ss
pascal@19515 248 pop gs
pascal@19636 249 endif
pascal@19515 250 assume nothing
pascal@19515 251 assume cs:DGROUP
pascal@19515 252 retf
pascal@19515 253
pascal@20473 254 step19code
pascal@20477 255
pascal@20477 256 endp _boot_kernel
pascal@20477 257
pascal@19515 258 movedend:
pascal@19515 259
pascal@19515 260 ends _TEXT
pascal@19515 261
pascal@19515 262 end
pascal@19515 263
pascal@19515 264 ;###### END OF FILE ############################################