* 0xFE - Unused
* 0xFF - System Calls / Kernel's User Code
*/
+#define DEBUG 1
#include <common.h>
#include <mm_phys.h>
#include <proc.h>
// === IMPORTS ===
extern Uint32 gaInitPageDir[1024];
extern Uint32 gaInitPageTable[1024];
+extern void Threads_SegFault(Uint Addr);
// === PROTOTYPES ===
void MM_PreinitVirtual();
gaPageTable[Addr>>12] &= PF_USER;
gaPageTable[Addr>>12] |= paddr|PF_PRESENT|PF_WRITE;
}
+ //LOG("Duplicated page at %p to 0x%x", Addr&~0xFFF, gaPageTable[Addr>>12]);
INVLPG( Addr & ~0xFFF );
//LEAVE('-')
return;
}
+ // If it was a user, tell the thread handler
+ if(ErrorCode & 4) {
+ Threads_SegFault(Addr);
+ return ;
+ }
+
// -- Check Error Code --
if(ErrorCode & 8)
Warning("Reserved Bits Trashed!");
const tPAddr MASK = ~0xF98;
Start >>= 12; End >>= 12;
+
+ Log("Directory Entries:");
+ for(page = Start >> 10;
+ page < (End >> 10)+1;
+ page ++)
+ {
+ if(gaPageDir[page])
+ {
+ Log(" 0x%08x-0x%08x :: 0x%08x",
+ page<<22, ((page+1)<<22)-1,
+ gaPageDir[page]&~0xFFF
+ );
+ }
+ }
+
+ Log("Table Entries:");
for(page = Start, curPos = Start<<12;
page < End;
curPos += 0x1000, page++)
|| (gaPageTable[page] & MASK) != expected)
{
if(expected) {
- Log("0x%08x-0x%08x => 0x%08x-0x%08x (%s%s%s%s)",
+ Log(" 0x%08x-0x%08x => 0x%08x-0x%08x (%s%s%s%s)",
rangeStart, curPos - 1,
gaPageTable[rangeStart>>12] & ~0xFFF,
(expected & ~0xFFF) - 1,
}
MM_DerefPhys( gaPageDir[i] & ~0xFFF );
+ gaPageDir[i] = 0;
+ INVLPG( &gaPageTable[i*1024] );
}
+ INVLPG( gaPageDir );
-
- return *gTmpCR3;
+ return *gaPageCR3;
}
/**
Uint MM_Clone()
{
Uint i, j;
+ Uint page = 0;
Uint kStackBase = Proc_GetCurThread()->KernelStack - KERNEL_STACK_SIZE;
void *tmp;
// Check if table is allocated
if( !(gaPageDir[i] & PF_PRESENT) ) {
gaTmpDir[i] = 0;
+ page += 1024;
continue;
}
// Allocate new table
gaTmpDir[i] = MM_AllocPhys() | (gaPageDir[i] & 7);
- INVLPG( &gaTmpTable[i*1024] );
+ INVLPG( &gaTmpTable[page] );
// Fill
- for( j = 0; j < 1024; j ++ )
+ for( j = 0; j < 1024; j ++, page++ )
{
- if( !(gaPageTable[i*1024+j] & PF_PRESENT) ) {
- gaTmpTable[i*1024+j] = 0;
+ if( !(gaPageTable[page] & PF_PRESENT) ) {
+ gaTmpTable[page] = 0;
continue;
}
// Refrence old page
- MM_RefPhys( gaPageTable[i*1024+j] & ~0xFFF );
+ MM_RefPhys( gaPageTable[page] & ~0xFFF );
// Add to new table
- if(gaPageTable[i*1024+j] & PF_WRITE) {
- gaTmpTable[i*1024+j] = (gaPageTable[i*1024+j] & ~PF_WRITE) | PF_COW;
- gaPageTable[i*1024+j] = (gaPageTable[i*1024+j] & ~PF_WRITE) | PF_COW;
+ if(gaPageTable[page] & PF_WRITE) {
+ gaTmpTable[page] = (gaPageTable[page] & ~PF_WRITE) | PF_COW;
+ gaPageTable[page] = (gaPageTable[page] & ~PF_WRITE) | PF_COW;
+ INVLPG( page << 12 );
}
else
- gaTmpTable[i*1024+j] = gaPageTable[i*1024+j];
+ gaTmpTable[page] = gaPageTable[page];
}
}