wok annotate linld/stuff/src/_BEG.ASM @ rev 19884

bluez: add /usr/bin/bluepin
author Pascal Bellard <pascal.bellard@slitaz.org>
date Mon Apr 03 17:30:48 2017 +0200 (2017-04-03)
parents 766a40e6c5e0
children 04feaffdc0d9
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 p8086
pascal@19515 9
pascal@19515 10 group DGROUP _TEXT,_DATA,_BSS
pascal@19515 11 assume cs:DGROUP,ds:DGROUP
pascal@19515 12
pascal@19515 13 segment _TEXT byte public use16 'CODE'
pascal@19515 14
pascal@19825 15 macro cpuid
pascal@19825 16 db 0fh,0A2h
pascal@19825 17 endm
pascal@19825 18
pascal@19515 19 org 100h
pascal@19515 20 global _text_start:byte
pascal@19515 21 label _text_start byte
pascal@19546 22
pascal@19515 23 ;***************************************************************
pascal@19515 24 ; clear bss
pascal@19515 25 ;***************************************************************
pascal@19546 26 mov bx,offset _bss_start
pascal@19515 27 clearbss:
pascal@19546 28 mov [byte bx],0 ; clear bss + heap + sp
pascal@19546 29 inc bx
pascal@19546 30 jne clearbss
pascal@19571 31 cld
pascal@19546 32
pascal@19546 33 ;***************************************************************
pascal@19546 34 ; check CPU
pascal@19546 35 ;***************************************************************
pascal@19546 36
pascal@19546 37 ; Check for oldies
pascal@19873 38 ifndef EXTRA
pascal@19848 39 push sp
pascal@19848 40 pop ax
pascal@19873 41 sub ax,sp
pascal@19873 42 ifndef NO386
pascal@19571 43 mov bx,offset msg_badcpu
pascal@19848 44 jnz no_vcpi ;it is a 86/186 not a 286+
pascal@19873 45 else
pascal@19873 46 jnz endcpu ;it is a 86/186 not a 286+
pascal@19873 47 endif
pascal@19546 48 else
pascal@19873 49 pushf
pascal@19873 50 mov bh, 0F0h
pascal@19873 51 push bx ; < 286 : flags[12..15] are forced 1
pascal@19873 52 popf ; = 286 : flags[12..15] are forced 0
pascal@19873 53 pushf ; > 286 : only flags[15] is forced 0
pascal@19873 54 pop dx
pascal@19873 55 popf
pascal@19873 56 add dh,bh ; NS=386+, NC=286
pascal@19873 57 ifndef NO386
pascal@19873 58 mov bx,offset msg_badcpu
pascal@19874 59 js no_vcpi ;it is not a 386+
pascal@19873 60 else
pascal@19874 61 js endcpu ;it is not a 386+
pascal@19873 62 endif
pascal@19546 63 endif
pascal@19636 64 p386
pascal@19825 65 ifdef EXTRA
pascal@19825 66 pushfd
pascal@19825 67 pop dx
pascal@19825 68 pop ax
pascal@19825 69 mov bl,al
pascal@19825 70 xor al,20h ; toggle CPUID feature bit 21
pascal@19825 71 push ax
pascal@19825 72 push dx
pascal@19825 73 popfd
pascal@19825 74 pushfd
pascal@19825 75 pop dx
pascal@19825 76 pop ax
pascal@19825 77 xor al,bl ; clear C
pascal@19825 78 je @@check_vm ; CPUID feature bit changed ?
pascal@19825 79 mov eax,80000001h ; Extended Processor Info and Feature Bits
pascal@19825 80 cpuid
pascal@19825 81 mov [_cpu_features],edx
pascal@19825 82 @@check_vm:
pascal@19825 83 endif
pascal@19546 84 ; Check for vm
pascal@19546 85 smsw ax ;SMSW cannot be trapped! :-)
pascal@19571 86 and al,1 ;MSW_PE
pascal@19546 87 ; We're in vm
pascal@19571 88 jz check_rm_paging
pascal@19546 89
pascal@19546 90 ;***************************************************************
pascal@19546 91 ; checks for vcpi
pascal@19546 92 ;***************************************************************
pascal@19546 93 label check_vcpi near
pascal@19546 94 push ds
pascal@19546 95 ; Check whether it is safe to call 67h (we trust only known EMM managers)
pascal@19825 96 xor bx,bx
pascal@19825 97 push bx
pascal@19546 98 pop ds
pascal@19546 99 mov ds,[word 67h*4+2]
pascal@19825 100 cmp [dword bx+10+4],'0XXX'
pascal@19546 101 jne skip
pascal@19825 102 ;mov eax,'XMME'
pascal@19825 103 ;xor eax,[dword bx+10]
pascal@19546 104 ; QMME also works (as told by <J.S.Peatfield@damtp.cambridge.ac.uk>)
pascal@19825 105 ;shl eax,8
pascal@19825 106 mov ax,'ME'
pascal@19825 107 xor ax,[word bx+10]
pascal@19546 108 skip:
pascal@19546 109 pop ds
pascal@19546 110 jne no_vcpi
pascal@19546 111
pascal@19546 112 ; Check emm manager status and version
pascal@19571 113 ;mov ah,40h ; get status
pascal@19571 114 ;int 67h
pascal@19571 115 ;test ah,ah
pascal@19571 116 ;jnz no_vcpi
pascal@19546 117 mov ah,46h ; get version
pascal@19546 118 int 67h
pascal@19546 119 test ah,ah
pascal@19546 120 jnz no_vcpi
pascal@19546 121 cmp al,40h ; version must be >= 4.0
pascal@19546 122 jb no_vcpi
pascal@19546 123 ; Check vcpi manager status
pascal@19546 124 ;;mov ax,5A01h ; ALLOCATE RAW PAGES
pascal@19546 125 ;;mov bx,4
pascal@19546 126 ;;int 67h
pascal@19546 127 ;;test ah,ah
pascal@19546 128 ;;jnz no_vcpi
pascal@19546 129 ;;push dx ;$ save handle
pascal@19546 130 mov ax,0DE00h ; check for vcpi present
pascal@19546 131 int 67h
pascal@19546 132 test ah,ah
pascal@19571 133 jnz no_vcpi
pascal@19546 134 is386vcpi:
pascal@19571 135 inc [_vcpi]
pascal@19546 136 extrn prepare_vcpi:near
pascal@19546 137 call prepare_vcpi
pascal@19546 138 ; get_vcpi_interface() || die("VCPI: low 640k: need 1:1 mapping");
pascal@19546 139 ;extrn _get_vcpi_interface:near
pascal@19546 140 ;call _get_vcpi_interface
pascal@19546 141 mov bx,offset msg_badmapping
pascal@19634 142 jz endcpu
pascal@19571 143 no_vcpi:
pascal@19636 144 p8086
pascal@19571 145 ;;pop dx ;$ handle
pascal@19571 146 ;;mov ax,4500h ; DEALLOCATE PAGES
pascal@19571 147 ;;int 67h
pascal@19571 148 extrn die:near
pascal@19571 149 godie:
pascal@19571 150 jmp near die
pascal@19571 151 check_rm_paging:
pascal@19571 152 ; It's a 386 in real mode, chk for paging (crazy but possible)
pascal@19636 153 p386
pascal@19571 154 mov edx,cr0
pascal@19571 155 shl edx,1 ;CR0_PG to CF
pascal@19571 156 jc no_vcpi
pascal@19546 157 endcpu:
pascal@19636 158 p8086
pascal@19546 159
pascal@19515 160 ;***************************************************************
pascal@19515 161 ; build argv & argc
pascal@19515 162 ;***************************************************************
pascal@19546 163 extrn _heap_top:word
pascal@19546 164 mov di,[_heap_top]
pascal@19546 165 ;xor ax,ax
pascal@19546 166 ;push ax ; envp (already cleared)
pascal@19546 167 ;mov [word di],ax ; argv[0] = 0 (idem)
pascal@19515 168 mov si,80h
pascal@19515 169 lodsb
pascal@19515 170 cmp al,7Eh
pascal@19515 171 jbe alok
pascal@19515 172 mov al,7Eh
pascal@19515 173 alok:
pascal@19546 174 cbw
pascal@19515 175 xchg ax,bx
pascal@19515 176 mov [bx+si],bh ; set eos
pascal@19515 177 argbuild:
pascal@19515 178 mov bx,2 ; argc * 2
pascal@19515 179 argeos:
pascal@19515 180 mov dl,1 ; look for a start of string
pascal@19515 181 mov [byte si-1],bh ; mark eos
pascal@19515 182 mov ah,20h ; space will be eos
pascal@19515 183 arglp:
pascal@19515 184 lodsb
pascal@19515 185 cmp al,0h
pascal@19515 186 je argdone
pascal@19515 187 cmp al,20h
pascal@19515 188 jb argeos
pascal@19515 189 cmp al,ah
pascal@19515 190 je argeos
pascal@19515 191 cmp al,27h
pascal@19515 192 je isargstr
pascal@19515 193 cmp al,22h
pascal@19515 194 je isargstr
pascal@19515 195 or dl,dl
pascal@19515 196 je arglp ; not start of string
pascal@19515 197 dec si
pascal@19884 198 ;jmp newarg
pascal@19884 199 db 0B9h ; mov cx,im opcode
pascal@19515 200 isargstr:
pascal@19515 201 mov ah,al ; expected eos
pascal@19515 202 newarg:
pascal@19515 203 mov [word bx+di],si ; argv[argc++] = si
pascal@19515 204 inc bx
pascal@19515 205 inc bx
pascal@19515 206 dec dx
pascal@19515 207 jmp arglp
pascal@19515 208 argdone:
pascal@19515 209 ;mov [word bx+di],0 ; argv[argc] = 0
pascal@19546 210 lea ax,[bx+di+2]
pascal@19546 211 mov [_heap_top],ax
pascal@19515 212 push di ; argv
pascal@19515 213 shr bx,1
pascal@19515 214 push bx ; argc
pascal@19515 215 ifndef filearg
pascal@19515 216 mov bx,[di+2] ; argv[1]
pascal@19515 217 cmp [byte bx],'@'
pascal@19515 218 jne argend
pascal@19546 219 inc bx
pascal@19515 220 extrn open:near
pascal@19515 221 call near open
pascal@19515 222 jc argend
pascal@19515 223 pop bx ; trash argc, argv >> 1Kb !
pascal@19546 224 global read_cmdline:near
pascal@19546 225 read_cmdline:
pascal@19515 226 push di
pascal@19515 227 push ax
pascal@19515 228 extrn _read:near
pascal@19515 229 call near _read
pascal@19515 230 pop bx ; fd for close
pascal@19515 231 pop si ; si=buffer=argv
pascal@19515 232 add di,ax
pascal@19515 233 pop ax ; trash sizemax=argv
pascal@19515 234 extrn close:near
pascal@19515 235 call near close
pascal@19515 236 jmp argbuild
pascal@19515 237 argend:
pascal@19515 238 endif
pascal@19515 239
pascal@19515 240 ;***************************************************************
pascal@19515 241 extrn _main:near
pascal@19515 242 call _main
pascal@19538 243
pascal@19515 244 ;***************************************************************
pascal@19515 245 global exit:near
pascal@19515 246 exit:
pascal@19515 247 mov ah,4Ch
pascal@19515 248 int 21h
pascal@19515 249 ends _TEXT
pascal@19515 250
pascal@19515 251 segment _DATA byte public use16 'DATA'
pascal@19515 252 global _data_start:byte
pascal@19515 253 label _data_start byte
pascal@19873 254 ifndef NO386
pascal@19546 255 msg_badcpu db "I need 386+ CPU in real mode or under VCPI manager"
pascal@19873 256 endif
pascal@19546 257 global _vcpi:byte
pascal@19546 258 _vcpi db 0
pascal@19546 259 msg_badmapping db "VCPI: low 640k: need 1:1 mapping",0
pascal@19546 260
pascal@19515 261 ends _DATA
pascal@19515 262
pascal@19515 263 segment _BSS byte public use16 'BSS'
pascal@19515 264 global _bss_start:byte
pascal@19515 265 label _bss_start byte
pascal@19825 266 ifdef EXTRA
pascal@19825 267 global _cpu_features:dword
pascal@19825 268 _cpu_features dd ?
pascal@19825 269 endif
pascal@19515 270 ends _BSS
pascal@19515 271
pascal@19515 272 end _text_start
pascal@19515 273
pascal@19515 274 ;###### END OF FILE ############################################