| 23,9 → 23,8 |
|---|
| |
| #include <ll/i386/cons.h> |
| #include <ll/i386/mem.h> |
| #include <ll/math.h> |
| |
| FILE(X - SysTab); |
| FILE(X-SysTab); |
| |
| extern GATE IDT[256]; |
| |
| 33,9 → 32,9 |
|---|
| /* to fill a GATE structure & copy it into the Interrupt Descriptor */ |
| /* Table or IDT; its phisical address is given by IDT_base */ |
| |
| void IDT_place(BYTE num, void (*handler) (void)) |
| void IDT_place(BYTE num,void (*handler)(void)) |
| { |
| DWORD offset = (DWORD) (handler); |
| DWORD offset = (DWORD)(handler); |
| IDT[num].sel = X_FLATCODE_SEL; |
| /* Set DPL = 3, to allow execution of the gate from any ring */ |
| IDT[num].access = INT_GATE386 | 0x60; |
| 49,7 → 48,7 |
|---|
| /* When a descriptor is cleared using it will cause a SEGMENT FAULT */ |
| /* to refer such descriptor */ |
| |
| void GDT_place(WORD sel, DWORD base, DWORD lim, BYTE acc, BYTE gran) |
| void GDT_place(WORD sel,DWORD base,DWORD lim,BYTE acc,BYTE gran) |
| { |
| union gdt_entry x; |
| /* This is declared in [wc32/gnu]\x0.[asm/s] */ |
| 60,8 → 59,8 |
|---|
| x.d.base_hi = ((base & 0xFF000000) >> 24); |
| x.d.access = acc; |
| x.d.lim_lo = (lim & 0xFFFF); |
| x.d.gran = (gran | ((lim >> 16) & 0x0F) | 0x40); |
| memcpy(GDT_base + (sel & ~3), &x, sizeof(union gdt_entry)); |
| x.d.gran = (gran | ((lim >> 16) & 0x0F) | 0x40); |
| memcpy(GDT_base+(sel & ~3),&x,sizeof(union gdt_entry)); |
| } |
| |
| /* This function is used to read & format the descriptor data */ |
| 69,14 → 68,14 |
|---|
| /* a descriptor rather than reading,modifying & updating with */ |
| /* this high level functions! */ |
| |
| DWORD GDT_read(WORD sel, DWORD * lim, BYTE * acc, BYTE * gran) |
| DWORD GDT_read(WORD sel,DWORD *lim,BYTE *acc,BYTE *gran) |
| { |
| union gdt_entry x; |
| /* This is declared in [wc32/gnu]\x0.[asm/s] */ |
| extern LIN_ADDR GDT_base; |
| /*DWORD offset = appl2linear(&x); */ |
| /*DWORD offset = appl2linear(&x);*/ |
| DWORD base; |
| memcpy(&x, GDT_base + sel, sizeof(union gdt_entry)); |
| memcpy(&x,GDT_base+sel,sizeof(union gdt_entry)); |
| base = x.d.base_hi; |
| base <<= 8; |
| base |= x.d.base_med; |
| 87,9 → 86,7 |
|---|
| *lim <<= 16; |
| *lim |= x.d.lim_lo; |
| } |
| if (acc != NULL) |
| *acc = x.d.access; |
| if (gran != NULL) |
| *gran = x.d.gran & 0xF0; |
| return (base); |
| if (acc != NULL) *acc = x.d.access; |
| if (gran != NULL) *gran = x.d.gran & 0xF0; |
| return(base); |
| } |