wok rev 19634
linld: some fixes for strtoul
| author | Pascal Bellard <pascal.bellard@slitaz.org> |
|---|---|
| date | Mon Jan 16 10:15:15 2017 +0100 (2017-01-16) |
| parents | 7c138665bd75 |
| children | faf865f8822c |
| files | linld/stuff/src/CRTL.ASM linld/stuff/src/CRTL.H linld/stuff/src/CRTLX.ASM linld/stuff/src/MEMCPY32.ASM linld/stuff/src/MEMTOP.ASM linld/stuff/src/VCPI.ASM linld/stuff/src/_BEG.ASM |
line diff
1.1 --- a/linld/stuff/src/CRTL.ASM Sun Jan 15 10:32:17 2017 +0100 1.2 +++ b/linld/stuff/src/CRTL.ASM Mon Jan 16 10:15:15 2017 +0100 1.3 @@ -39,6 +39,7 @@ 1.4 ;*************************************************************** 1.5 ;char* strcpy(const char* a, const char* b); 1.6 ;char* strcat(const char* a, const char* b); 1.7 +;char* strcatb(const char* a, const char* b); 1.8 ;*************************************************************** 1.9 global _strcpy:near 1.10 proc _strcpy near 1.11 @@ -48,7 +49,10 @@ 1.12 global _strcat:near 1.13 _strcat: 1.14 mov dl,1 1.15 -cat: 1.16 + db 0bbh ; mov bx,imm opcode 1.17 + global _strcatb:near 1.18 +_strcatb: 1.19 + mov dl,3 1.20 pop ax ;caller return address 1.21 pop cx ; a 1.22 pop bx ; b 1.23 @@ -86,18 +90,6 @@ 1.24 1.25 1.26 ;*************************************************************** 1.27 -;char* strcatb(const char* a, const char* b); 1.28 -;*************************************************************** 1.29 - global _strcatb:near 1.30 - proc _strcatb near 1.31 - 1.32 - mov dl,3 1.33 - jmp cat 1.34 - 1.35 - endp _strcatb 1.36 - 1.37 - 1.38 -;*************************************************************** 1.39 ;void* malloc(unsigned sz); 1.40 ;*************************************************************** 1.41 global _malloc:near 1.42 @@ -129,7 +121,6 @@ 1.43 1.44 ;*************************************************************** 1.45 ;void puts(const char* s): 1.46 -;void putsz(const char* s): 1.47 ;*************************************************************** 1.48 global _puts:near 1.49 proc _puts near 1.50 @@ -142,14 +133,7 @@ 1.51 puts: 1.52 call putsz 1.53 mov bx,offset msg_crlf 1.54 - jmp putsz 1.55 1.56 - global _putsz:near 1.57 -_putsz: 1.58 - pop ax ;caller return address 1.59 - pop bx ; s 1.60 - push bx 1.61 - push ax 1.62 global putsz:near ; putsz(bx) 1.63 putsz: 1.64 push bx 1.65 @@ -243,7 +227,7 @@ 1.66 proc _read near 1.67 1.68 stc 1.69 - db 73h ; jnc 1.70 + db 0B0h ; mov al,im 1.71 global _write:near 1.72 clc 1.73 pop ax ;caller return address 1.74 @@ -256,7 +240,6 @@ 1.75 push ax 1.76 mov ah,40h 1.77 sbb ah,0 1.78 - clc 1.79 jcxz fail 1.80 jmp dos 1.81 1.82 @@ -280,8 +263,10 @@ 1.83 global lseekset:near 1.84 lseekset: 1.85 clc 1.86 + db 0B0h ; mov al,im 1.87 global rewind:near 1.88 -rewind: ; rewind(bx,C=1) 1.89 +rewind: ; rewind(bx) 1.90 + stc 1.91 mov ax,4200h 1.92 jnc dos 1.93 lseek0: ; lseek0(bx,ax=dir) 1.94 @@ -326,24 +311,23 @@ 1.95 proc _strhead near 1.96 1.97 pop cx ;caller return address 1.98 - pop ax ; a 1.99 - pop bx ; b 1.100 + pop bx ; a 1.101 + pop ax ; b 1.102 + push ax 1.103 push bx 1.104 - push ax 1.105 push cx 1.106 @@loop: 1.107 + xchg ax,bx 1.108 mov cl,[bx] ; cl = *b++ 1.109 inc bx 1.110 or cl,cl ; clear C 1.111 jz fail ; return 0 1.112 xchg ax,bx 1.113 xor cl,[bx] ; cl -= *a++ 1.114 + inc bx 1.115 and cl,0dfh ; case insensitive 1.116 - stc 1.117 - jnz fail ; return -1 1.118 - inc bx 1.119 - xchg ax,bx 1.120 - jmp @@loop 1.121 + jz @@loop 1.122 + ret ; return b (is not 0) 1.123 1.124 endp _strhead 1.125 1.126 @@ -653,12 +637,11 @@ 1.127 global _reset_bufv:near 1.128 proc _reset_bufv near 1.129 1.130 - pop bx ;caller return address 1.131 - pop ax 1.132 + pop ax ;caller return address 1.133 + pop bx 1.134 + push bx 1.135 push ax 1.136 - push bx 1.137 - mov [curdata],ax 1.138 - xchg ax,bx 1.139 + mov [curdata],bx 1.140 and [dword (data_himem bx).cacheidx],0 1.141 ret 1.142 1.143 @@ -725,7 +708,7 @@ 1.144 1.145 1.146 ;*************************************************************** 1.147 -;void next_chunk(struct image_himem *m); 1.148 +;void next_chunk(struct image_himem *di); 1.149 ;*************************************************************** 1.150 proc next_chunk near 1.151 1.152 @@ -770,7 +753,6 @@ 1.153 mov bx,[(image_himem di).fd] 1.154 ifndef NO386 1.155 push eax 1.156 - stc 1.157 call rewind 1.158 pop eax 1.159 @@end: 1.160 @@ -778,7 +760,6 @@ 1.161 else 1.162 push ax 1.163 push dx 1.164 - stc 1.165 call rewind 1.166 pop dx 1.167 pop ax 1.168 @@ -909,7 +890,6 @@ 1.169 xor cx,cx 1.170 ifndef NO386 1.171 cwde ; ax < 8000h 1.172 - cwd 1.173 sub [(image_himem di).chunk_size],eax 1.174 else 1.175 cwd ; ax < 8000h 1.176 @@ -963,29 +943,30 @@ 1.177 push cx 1.178 push ax 1.179 xor ebx,ebx 1.180 - jcxz @@jncend 1.181 push si 1.182 + jcxz @@end 1.183 mov si,cx 1.184 xor ecx,ecx 1.185 xor eax,eax 1.186 lodsb 1.187 - mov dl,20h 1.188 - or dl,al 1.189 - cmp dl,'n' ; vga=normal 1.190 + mov dx,ax 1.191 + or al,20h 1.192 + cmp al,'n' ; vga=normal 1.193 je @@vga 1.194 dec cx 1.195 - cmp dl,'e' ; vga=extended 1.196 + cmp al,'e' ; vga=extended 1.197 je @@vga 1.198 dec cx 1.199 - cmp dl,'a' ; vga=ask 1.200 + cmp al,'a' ; vga=ask 1.201 jne @@notvga 1.202 @@vga: 1.203 dec cx 1.204 xchg ax,cx 1.205 cwd 1.206 - jmp popsiret 1.207 + jmp @@popsiret 1.208 @@notvga: 1.209 mov cx,10 ; radix 1.210 + xchg ax,dx 1.211 cmp al,'+' 1.212 je @@radixskip 1.213 cmp al,'-' 1.214 @@ -1000,19 +981,18 @@ 1.215 jne @@radixok 1.216 mov cl,8 1.217 lodsb 1.218 - mov dl,20h 1.219 - or dl,al 1.220 - cmp dl,'x' 1.221 + or al,20h 1.222 + cmp al,'x' 1.223 jne @@radixok 1.224 mov cl,16 1.225 @@strtollp: 1.226 lodsb 1.227 @@radixok: 1.228 + or al,20h 1.229 sub al,'0' 1.230 jb @@endstrtol 1.231 cmp al,9 1.232 jbe @@digitok 1.233 - or al,20h 1.234 cmp al,'a'-'0' 1.235 jb @@endstrtol 1.236 sub al,'a'-'0'-10 1.237 @@ -1038,14 +1018,13 @@ 1.238 shl ebx,cl 1.239 @@noshift: 1.240 popf 1.241 -@@jncend: 1.242 jnc @@end 1.243 neg ebx 1.244 @@end: 1.245 push ebx 1.246 pop ax 1.247 pop dx 1.248 -popsiret: 1.249 +@@popsiret: 1.250 pop si 1.251 else 1.252 pop ax ;caller return address 1.253 @@ -1056,29 +1035,28 @@ 1.254 push di 1.255 xor ax,ax 1.256 cwd 1.257 + jcxz @@goend 1.258 xchg ax,di 1.259 - jcxz @@goend 1.260 mov si,cx 1.261 lodsb 1.262 - mov dl,20h 1.263 - or dl,al 1.264 + mov bx,ax 1.265 + or al,20h 1.266 mov cx,-1 1.267 - cmp dl,'n' ; vga=normal 1.268 + cmp al,'n' ; vga=normal 1.269 je @@vga 1.270 dec cx 1.271 - cmp dl,'e' ; vga=extended 1.272 + cmp al,'e' ; vga=extended 1.273 je @@vga 1.274 dec cx 1.275 - cmp dl,'a' ; vga=ask 1.276 + cmp al,'a' ; vga=ask 1.277 jne @@notvga 1.278 @@vga: 1.279 xchg ax,cx 1.280 - cwd 1.281 - jmp popsiret 1.282 @@goend: 1.283 - jmp @@end 1.284 + jmp @@popdisiret 1.285 @@notvga: 1.286 mov cx,10 ; radix 1.287 + xchg ax,bx 1.288 cmp al,'+' 1.289 je @@radixskip 1.290 cmp al,'-' 1.291 @@ -1093,19 +1071,18 @@ 1.292 jne @@radixok 1.293 mov cl,8 1.294 lodsb 1.295 - mov ah,20h 1.296 - or ah,al 1.297 - cmp ah,'x' 1.298 + mov al,20h 1.299 + cmp al,'x' 1.300 jne @@radixok 1.301 mov cl,16 1.302 @@strtollp: 1.303 lodsb 1.304 @@radixok: 1.305 + or al,20h 1.306 sub al,'0' 1.307 jb @@endstrtol 1.308 cmp al,9 1.309 jbe @@digitok 1.310 - or al,20h 1.311 cmp al,'a'-'0' 1.312 jb @@endstrtol 1.313 sub al,'a'-'0'-10 1.314 @@ -1155,8 +1132,8 @@ 1.315 inc dx 1.316 @@end: 1.317 xchg ax,di 1.318 +@@popdisiret: 1.319 pop di 1.320 -popsiret: 1.321 pop si 1.322 endif 1.323 ret 1.324 @@ -1175,7 +1152,7 @@ 1.325 jnc @@max640k 1.326 mov ax,640 ; 9000 1.327 @@max640k: 1.328 - sub ax,028h 1.329 + dec ax 1.330 and al,0C0h 1.331 mov cl,6 1.332 shl ax,cl
2.1 --- a/linld/stuff/src/CRTL.H Sun Jan 15 10:32:17 2017 +0100 2.2 +++ b/linld/stuff/src/CRTL.H Mon Jan 16 10:15:15 2017 +0100 2.3 @@ -43,7 +43,6 @@ 2.4 extern "C" long lseekset(int fd, long sz); 2.5 extern "C" void* malloc(unsigned sz); 2.6 extern "C" void puts(const char* s); 2.7 -extern "C" void putsz(const char* s); 2.8 extern "C" unsigned long strtol(const char *s); 2.9 2.10 // Extensions
3.1 --- a/linld/stuff/src/CRTLX.ASM Sun Jan 15 10:32:17 2017 +0100 3.2 +++ b/linld/stuff/src/CRTLX.ASM Mon Jan 16 10:15:15 2017 +0100 3.3 @@ -30,18 +30,18 @@ 3.4 global _strcmp:near 3.5 proc _strcmp near 3.6 3.7 - pop ax ;caller return address 3.8 - pop cx ; a 3.9 - pop bx ; b 3.10 + pop cx ;caller return address 3.11 + pop bx ; a 3.12 + pop ax ; b 3.13 + push ax 3.14 push bx 3.15 push cx 3.16 - push ax 3.17 push si 3.18 - mov si,cx 3.19 + xchg ax,si 3.20 sub bx,si 3.21 @@lp: 3.22 - mov al,[bx+si] 3.23 - sub al,[si] 3.24 + mov al,[si] 3.25 + sub al,[bx+si] 3.26 jnz @@out 3.27 lodsb 3.28 cmp al,0 3.29 @@ -295,16 +295,16 @@ 3.30 global _kver2ul:near 3.31 proc _kver2ul near 3.32 3.33 + pop bx 3.34 pop ax 3.35 - pop dx 3.36 - push dx 3.37 push ax 3.38 + push bx 3.39 push bp si di 3.40 + xchg ax,si 3.41 xor di,di 3.42 push di 3.43 push di 3.44 mov bp,sp 3.45 - mov si,dx 3.46 inc di 3.47 inc di 3.48 mov cl,4 3.49 @@ -372,7 +372,6 @@ 3.50 push cx 3.51 push dx 3.52 push ax 3.53 - xor ax,ax 3.54 extrn _isostate:isostate 3.55 mov bx,[_isostate.fd] 3.56 extrn lseekset:near
4.1 --- a/linld/stuff/src/MEMCPY32.ASM Sun Jan 15 10:32:17 2017 +0100 4.2 +++ b/linld/stuff/src/MEMCPY32.ASM Mon Jan 16 10:15:15 2017 +0100 4.3 @@ -113,15 +113,13 @@ 4.4 oldGDTR :pword = TEMP_SIZE 4.5 4.6 ;****** Init *************************************************** 4.7 - push bp 4.8 - mov bp,sp 4.9 - sub sp,TEMP_SIZE 4.10 + 4.11 + ifndef NO386 4.12 + 4.13 + enter TEMP_SIZE,0 4.14 ;cld 4.15 pushf 4.16 push ds es 4.17 - 4.18 - ifndef NO386 4.19 - 4.20 pushad 4.21 mov cl,4 4.22 movzx esi,[srcseg] 4.23 @@ -156,6 +154,12 @@ 4.24 @@pmcopy: 4.25 else 4.26 4.27 + push bp 4.28 + mov bp,sp 4.29 + sub sp,TEMP_SIZE 4.30 + ;cld 4.31 + pushf 4.32 + push ds es 4.33 push si 4.34 xor bx,bx 4.35 xor dx,dx 4.36 @@ -233,7 +237,7 @@ 4.37 mov eax,cs 4.38 shl eax,4 4.39 addzx_e ax,<offset GDT> 4.40 - mov [word GDTR],-1 ;GDT limit = 0FFFFh 4.41 + or [word GDTR],-1 ;GDT limit = 0FFFFh 4.42 mov [dword GDTR+2],eax ;GDT base 4.43 lgdt [GDTR] 4.44 4.45 @@ -248,7 +252,7 @@ 4.46 pop ds ;base=0, lim = 4gb 4.47 push ds ; 4.48 pop es ; 4.49 - db 66h ;operand width override for ecx 4.50 + ;db 66h ;operand width override for ecx 4.51 db 67h ;address width override for esi/edi 4.52 rep movsb 4.53 cld 4.54 @@ -266,8 +270,12 @@ 4.55 @@done16: 4.56 pop es ds 4.57 popf 4.58 + ifndef NO386 4.59 + leave 4.60 + else 4.61 mov sp,bp 4.62 pop bp 4.63 + endif 4.64 ret 4.65 4.66 ;****** Const data *********************************************
5.1 --- a/linld/stuff/src/MEMTOP.ASM Sun Jan 15 10:32:17 2017 +0100 5.2 +++ b/linld/stuff/src/MEMTOP.ASM Mon Jan 16 10:15:15 2017 +0100 5.3 @@ -78,10 +78,11 @@ 5.4 jnc @@ok ; error: cf=1 or ax=0 5.5 xor ax,ax ; 5.6 @@ok: 5.7 - xor dx,dx 5.8 +; xor dx,dx 5.9 test ax,ax ;happens on big mem systems 5.10 jz @@fail 5.11 tokb: 5.12 + xor dx,dx 5.13 add ah,4h ;account for 1024 low kb 5.14 adc dx,dx ; (optimized to death) 5.15 ifndef NO386 5.16 @@ -117,7 +118,6 @@ 5.17 cli 5.18 call rdcmos17 5.19 popf 5.20 - xor dx,dx 5.21 jmp tokb 5.22 5.23 rdcmos17: mov al,18h ; read bytes 17-18 from CMOS
6.1 --- a/linld/stuff/src/VCPI.ASM Sun Jan 15 10:32:17 2017 +0100 6.2 +++ b/linld/stuff/src/VCPI.ASM Mon Jan 16 10:15:15 2017 +0100 6.3 @@ -65,11 +65,6 @@ 6.4 use_32 = 01000000b 6.5 6.6 ;****** rm32,imm16 helpers 6.7 -macro movzx_e rm,i 6.8 - db 66h 6.9 - mov rm,i 6.10 - dw 0 6.11 -endm 6.12 macro addzx_e rm,i 6.13 db 66h 6.14 add rm,i 6.15 @@ -77,13 +72,11 @@ 6.16 endm 6.17 6.18 6.19 - group DGROUP _TEXT,_DATA 6.20 + group DGROUP _TEXT,_DATA,_BSS 6.21 assume cs:DGROUP,ds:DGROUP 6.22 6.23 segment _DATA byte public use16 'DATA' 6.24 6.25 -tss dd 0,0 ;enough, we'll never use it anyway 6.26 - 6.27 label gdt byte 6.28 gdt_null descr <?> ;0000 6.29 gdt_vcpi descr <?> ;0008 6.30 @@ -104,39 +97,42 @@ 6.31 label gdtr pword 6.32 gdt_lim dw 0ffffh 6.33 gdt_base dw offset gdt,0 6.34 -label idtr pword 6.35 -idt_lim dw 03ffh ;we won't enable ints, 6.36 -idt_base dd 0 ; so let's leave it the same as for rm 6.37 6.38 ;Note: layout dictated by vcpi api, don't rearrange! 6.39 label sw2pm_params byte 6.40 ;Note: base addrs will be fixed up in prepare_vcpi() 6.41 +label pagedir_laddr dword 6.42 sw2pm_cr3 dd ? 6.43 sw2pm_gdtr_ptr dw offset gdtr,0 6.44 sw2pm_idtr_ptr dw offset idtr,0 6.45 sw2pm_ldtr dw 0 ;we don't need it 6.46 sw2pm_tr dw SEL_TSS ;vcpi thinks we need it... can't set to 0 6.47 -sw2pm_jumpaddr dd ? 6.48 +sw2pm_jumpaddr dd 0 6.49 dw SEL_CODE 6.50 6.51 +vcpi_pm_entry dd 0 6.52 + dw SEL_VCPI 6.53 + 6.54 +label idtr pword 6.55 +idt_lim dw 03ffh ;we won't enable ints, 6.56 +idt_base dd 0 ; so let's leave it the same as for rm 6.57 + 6.58 + ends _DATA 6.59 + 6.60 + segment _BSS byte public use16 'BSS' 6.61 + 6.62 ;Pagedir/page0 addrs: linear, seg:0 and cs:ofs 6.63 -pagedir_laddr dd ? 6.64 page0_laddr dd ? 6.65 -;;pagedir_seg dw ? 6.66 -;;page0_seg dw ? 6.67 -pagedir_ofs dw ? 6.68 -page0_ofs dw ? 6.69 - 6.70 -vcpi_pm_entry dd ? 6.71 - dw SEL_VCPI 6.72 +;pagedir_ofs dw ? 6.73 +;page0_ofs dw ? 6.74 6.75 label saved_ss_sp dword 6.76 saved_sp dw ? 6.77 saved_ss dw ? 6.78 6.79 +tss dd ?,? ;enough, we'll never use it anyway 6.80 6.81 - ends _DATA 6.82 - 6.83 + ends _BSS 6.84 6.85 segment _TEXT byte public use16 'CODE' 6.86 6.87 @@ -166,45 +162,51 @@ 6.88 6.89 mov cl,4 6.90 mov edx,cs 6.91 - shl edx,cl ;ebx = linear addr of CS 6.92 - mov bx, offset page0_laddr 6.93 + shl edx,cl ;edx = linear addr of CS 6.94 + mov si,offset gdt_vcpi 6.95 ; Fix up base of some gdt descriptors 6.96 ; Note: 'add [dword xx.base0],edx' actually updates 24 bit quantity! 6.97 ; Do NOT replace with mov! 6.98 - add [dword bx+gdt_base-page0_laddr],edx 6.99 - add [dword bx+sw2pm_gdtr_ptr-page0_laddr],edx 6.100 - add [dword bx+sw2pm_idtr_ptr-page0_laddr],edx 6.101 - add [dword bx+(gdt_code.base0)-page0_laddr],edx 6.102 - add [dword bx+(gdt_data.base0)-page0_laddr],edx 6.103 - add [dword bx+(gdt_tss.base0)-page0_laddr],edx 6.104 + xor ebx,ebx 6.105 + add [dword bx+si+sw2pm_idtr_ptr-gdt_vcpi],edx 6.106 +@@fixup: 6.107 + add [dword bx+si+(gdt_code.base0)-gdt_vcpi],edx 6.108 + add bl,8 6.109 + cmp bl,28h 6.110 + jb @@fixup 6.111 + ;add [dword si+(gdt_data.base0)-gdt_vcpi],edx 6.112 + ;add [dword si+(gdt_tss.base0)-gdt_vcpi],edx 6.113 + ;add [dword si+gdt_base-gdt_vcpi],edx 6.114 + ;add [dword si+sw2pm_gdtr_ptr-gdt_vcpi],edx 6.115 + ;add [dword si+sw2pm_idtr_ptr-gdt_vcpi],edx 6.116 add eax,edx 6.117 - mov esi,0FFFh 6.118 - add eax,esi 6.119 - inc si ;esi=00001000h 6.120 + mov bx,0FFFh 6.121 + add eax,ebx 6.122 + inc bx ;ebx=00001000h 6.123 6.124 shr eax,cl 6.125 mov al,0 ;eax = 4k aligned linear addr of pagebuf 6.126 mov es,ax ;es:0->page0,es:1000h->pagedir 6.127 shl eax,cl ;eax=page0 linear addr 6.128 - mov [bx+page0_laddr-page0_laddr],eax 6.129 mov al,3 ;add present+writable bits 6.130 - mov [es:si],eax ;stuff it into pagedir[0] 6.131 + mov [es:bx],eax ;stuff it into pagedir[0] 6.132 + push ds 6.133 + pop es 6.134 6.135 - add eax,esi 6.136 mov al,0 6.137 - mov [bx+pagedir_laddr-page0_laddr],eax 6.138 + mov [page0_laddr],eax 6.139 + add eax,ebx 6.140 + ;mov [pagedir_laddr],eax 6.141 ;page directory will use only one entry (4 bytes): 6.142 ;cr3 => pagedir => page0 => ######## 6.143 ; (1 entry) (1024 => # 4M # 6.144 ; entries)=> # page # 6.145 ; => ######## 6.146 - mov [bx+sw2pm_cr3-page0_laddr],eax 6.147 + mov [sw2pm_cr3],eax 6.148 sub eax,edx ;ax = offset in CS of pagedir 6.149 - mov [bx+pagedir_ofs-page0_laddr],ax 6.150 - sub ax,si ;ax-=1000 6.151 - mov [bx+page0_ofs-page0_laddr],ax 6.152 - push ds 6.153 - pop es 6.154 + ;mov [pagedir_ofs],ax 6.155 + sub ax,bx ;ax-=1000 6.156 + ;mov [page0_ofs],ax 6.157 mov di,ax ;ES:DI => page0 6.158 ; Return 6.159 ;pop es 6.160 @@ -219,8 +221,8 @@ 6.161 6.162 ;*************************************************************** 6.163 ;int get_vcpi_interface(); 6.164 -;****** Return: AX=1 - page mapping for low 640k is 1:1 6.165 -;****** AX=0 - otherwise (it's bad) 6.166 +;****** Return: Z - page mapping for low 640k is 1:1 6.167 +;****** NZ - otherwise (it's bad) 6.168 ;****** Uses: Flags 6.169 ;*************************************************************** 6.170 global _get_vcpi_interface:near 6.171 @@ -229,32 +231,29 @@ 6.172 ;push si di 6.173 6.174 ; Get and save VCPI pm interface 6.175 - mov si,offset gdt_vcpi ;DS:DI => 3 GDT entries for VCPI 6.176 + ;mov si,offset gdt_vcpi ;DS:DI => 3 GDT entries for VCPI 6.177 ;mov di,[si+page0_ofs-gdt_vcpi] ;ES:DI => page0 6.178 ;push ds 6.179 ;pop es 6.180 + push di 6.181 mov ax,0DE01h ;get vcpi pm interface 6.182 int 67h 6.183 - mov [vcpi_pm_entry],ebx 6.184 + xchg [vcpi_pm_entry],ebx ;clear ebx 6.185 + ;xor bx,bx 6.186 6.187 ; Check that mapping for low 640k is 1:1 6.188 - mov si,[page0_ofs] 6.189 - xor bx,bx 6.190 + pop si ; [page0_ofs] 6.191 ;cld 6.192 @@map_chk: 6.193 lodsd 6.194 shr eax,12 6.195 cmp ax,bx 6.196 - stc 6.197 jne @@bad 6.198 inc bx 6.199 - cmp ax,((640*1024) shr 12)-1 6.200 + cmp al,((640*1024) shr 12)-1 6.201 jne @@map_chk 6.202 ; Return 6.203 @@bad: 6.204 - sbb ax,ax 6.205 - inc ax ; update Z 6.206 - ;pop di si 6.207 ret 6.208 endp _get_vcpi_interface 6.209 6.210 @@ -302,17 +301,10 @@ 6.211 push ax ;\eip 6.212 push offset @@vm_ret ;/ 6.213 6.214 - cli 6.215 ;;mov [saved_xx],xx ;use if your vcpi trashes bp/etc 6.216 6.217 - movzx_e <[word sw2pm_jumpaddr]>,<offset @@pm_entry> 6.218 - ;mov [word sw2pm_jumpaddr+4],SEL_CODE 6.219 - mov esi,cs 6.220 - shl esi,4 6.221 - addzx_e si,<offset sw2pm_params> 6.222 - mov ax,0DE0Ch ; vcpi: switch to pm 6.223 - int 67h 6.224 -@@pm_entry: 6.225 + call switch_to_pm 6.226 + 6.227 ; Now we are in 16-bit protected mode 6.228 mov ax,SEL_DATA 6.229 mov ss,ax 6.230 @@ -332,17 +324,30 @@ 6.231 call ax 6.232 6.233 ; Ok, let's return to vm 6.234 + mov ax,0DE0Ch ; maybe we need whole eax? 6.235 cli ; to be safe 6.236 clts ; 6.237 push SEL_ABS ; vcpi wants ds=all_addrspace 6.238 pop ds ; 6.239 - mov ax,0DE0Ch ; maybe we need whole eax? 6.240 call [pword cs:vcpi_pm_entry] 6.241 @@vm_ret: 6.242 ; Now we are in vm86 mode. Sregs, esp, eflags (IF) restored from IRET stack 6.243 ret 6.244 6.245 ;*************************************************************** 6.246 +switch_to_pm: 6.247 + assume cs:DGROUP,ds:DGROUP 6.248 + pop [word sw2pm_jumpaddr] 6.249 + ;mov [word sw2pm_jumpaddr+2],0 6.250 + ;mov [word sw2pm_jumpaddr+4],SEL_CODE 6.251 + mov esi,cs 6.252 + shl esi,4 6.253 + addzx_e si,<offset sw2pm_params> 6.254 + mov ax,0DE0Ch ; vcpi: switch to pm 6.255 + cli 6.256 + int 67h 6.257 + 6.258 +;*************************************************************** 6.259 ;****** Helper: This is where real copy is done 6.260 ;*************************************************************** 6.261 global do_memcpy_vcpi:near 6.262 @@ -350,29 +355,27 @@ 6.263 6.264 ; Note: ss:bp => params 6.265 ; Move data 6.266 - mov cx,SEL_ABS 6.267 - mov ds,cx 6.268 - mov es,cx 6.269 + mov ax,SEL_ABS 6.270 + mov ds,ax 6.271 + mov es,ax 6.272 assume nothing 6.273 assume cs:DGROUP 6.274 6.275 ; Set up target addr: 6.276 ; replace page mapping for page at 0 so 6.277 ; that it points to dstofs 6.278 - mov esi,[cs:page0_laddr] 6.279 mov eax,[dstofs] 6.280 mov al,03h ; writeable, present 6.281 - xchg [esi],eax ; replace page0[0] 6.282 + call @@set_mapping 6.283 ;push eax ;X we'll need to restore mapping... 6.284 - mov ecx,cr3 ; reload TLB cache 6.285 - mov cr3,ecx ; 6.286 xor edi,edi ;es:edi => remapped page 6.287 6.288 ; Set up source addr 6.289 mov esi,[srcofs] 6.290 6.291 ; Do copying 6.292 - mov ecx,4096/2 6.293 + xor ecx,ecx 6.294 + mov ch,4096/256 6.295 ;cld 6.296 ;; cmp esi,edi 6.297 ;; jae @@do_copy 6.298 @@ -383,13 +386,14 @@ 6.299 ;; std ; 6.300 ;;@@do_copy: 6.301 db 67h ;address width override for esi/edi 6.302 - rep movsw 6.303 + rep movsb 6.304 ;; cld 6.305 6.306 ; Restore page mapping for page at 0 6.307 ;pop eax ;X 6.308 +@@set_mapping: 6.309 mov esi,[cs:page0_laddr] 6.310 - mov [esi],eax ; restore page0[0] 6.311 + xchg [esi],eax ; restore page0[0] 6.312 mov ecx,cr3 ; reload TLB cache 6.313 mov cr3,ecx ; 6.314 ; Return 6.315 @@ -410,29 +414,22 @@ 6.316 extrn _vcpi:byte 6.317 test [_vcpi],-1 6.318 jz @@ret 6.319 - push esi 6.320 + push si 6.321 ;;pushf 6.322 - ;;cli 6.323 ;;pushad 6.324 push cs ;* 6.325 push ds 6.326 - push es 6.327 + ;push es 6.328 mov [saved_ss],ss 6.329 mov [saved_sp],sp 6.330 6.331 - movzx_e <[word sw2pm_jumpaddr]>,<offset @@pm_entry> 6.332 - ;mov [word sw2pm_jumpaddr+4],SEL_CODE 6.333 - mov esi,cs 6.334 - shl esi,4 6.335 - addzx_e si,<offset sw2pm_params> 6.336 - mov ax,0DE0Ch ; vcpi: switch to pm 6.337 - int 67h 6.338 + call switch_to_pm 6.339 + 6.340 ; Now we are in 16-bit protected mode 6.341 -@@pm_entry: 6.342 mov ax,SEL_DATA ; load data sregs with limit >=64k 6.343 mov ss,ax ; or you may get limit violations 6.344 mov ds,ax ; later in rm 6.345 - mov es,ax ; (actually I prefer 4gig limits :-) 6.346 + ;mov es,ax ; (actually I prefer 4gig limits :-) 6.347 ;mov fs,ax ; 6.348 ;mov gs,ax ; 6.349 6.350 @@ -446,7 +443,7 @@ 6.351 6.352 ; Now we are in rm, but not yet: have to restore sregs: 6.353 lss sp,[saved_ss_sp]; SS 6.354 - pop es ; ES 6.355 + ;pop es ; ES 6.356 pop ds ; DS 6.357 ;push cs ;* done earlier 6.358 push offset @@next 6.359 @@ -454,7 +451,7 @@ 6.360 @@next: 6.361 ;;popad 6.362 ;;popf 6.363 - pop esi 6.364 + pop si 6.365 @@ret: 6.366 ret ; We don't care much about rest (FS/GS) 6.367
7.1 --- a/linld/stuff/src/_BEG.ASM Sun Jan 15 10:32:17 2017 +0100 7.2 +++ b/linld/stuff/src/_BEG.ASM Mon Jan 16 10:15:15 2017 +0100 7.3 @@ -100,7 +100,7 @@ 7.4 ;extrn _get_vcpi_interface:near 7.5 ;call _get_vcpi_interface 7.6 mov bx,offset msg_badmapping 7.7 - jnz endcpu 7.8 + jz endcpu 7.9 no_vcpi: 7.10 ;;pop dx ;$ handle 7.11 ;;mov ax,4500h ; DEALLOCATE PAGES