Kernel/x86_64 - Debugging GUI errors (and a wild goose chase)

[tpg/acess2.git] / KernelLand / Kernel / arch / x86_64 / proc.c

diff --git a/KernelLand/Kernel/arch/x86_64/proc.c b/KernelLand/Kernel/arch/x86_64/proc.c
index 884babb..46e2b21 100644 (file)
--- a/KernelLand/Kernel/arch/x86_64/proc.c
+++ b/KernelLand/Kernel/arch/x86_64/proc.c
@@ -37,7 +37,7 @@ extern void   APStartup(void);        // 16-bit AP startup code
 
 extern Uint    GetRIP(void);   // start.asm
 extern Uint    SaveState(Uint *RSP, Uint *Regs);
-extern Uint    Proc_CloneInt(Uint *RSP, Uint *CR3);
+extern Uint    Proc_CloneInt(Uint *RSP, Uint *CR3, int bCopyUserVM);
 extern void    NewTaskHeader(void);    // Actually takes cdecl args
 extern void    Proc_InitialiseSSE(void);
 extern void    Proc_SaveSSE(Uint DestPtr);
@@ -75,6 +75,7 @@ void  Proc_StartProcess(Uint16 SS, Uint Stack, Uint Flags, Uint16 CS, Uint IP) NO
 //void Proc_DumpThreadCPUState(tThread *Thread);
 //void Proc_Reschedule(void);
 void   Proc_Scheduler(int CPU, Uint RSP, Uint RIP);
+Uint   Proc_int_SetIRQIP(Uint RIP);
 
 // === GLOBALS ===
 //!\brief Used by desctab.asm in SyscallStub
@@ -507,7 +508,7 @@ tTID Proc_Clone(Uint Flags)
        if(!newThread)  return -1;
        
        // Save core machine state
-       rip = Proc_CloneInt(&newThread->SavedState.RSP, &newThread->Process->MemState.CR3);
+       rip = Proc_CloneInt(&newThread->SavedState.RSP, &newThread->Process->MemState.CR3, !!(Flags & CLONE_NOUSER));
        if(rip == 0)    return 0;       // Child
        newThread->KernelStack = cur->KernelStack;
        newThread->SavedState.RIP = rip;
@@ -725,7 +726,14 @@ void Proc_CallFaultHandler(tThread *Thread)
 
 void Proc_DumpThreadCPUState(tThread *Thread)
 {
-       Log("  At %04x:%016llx", Thread->SavedState.UserCS, Thread->SavedState.UserRIP);
+       if( Thread->CurCPU == GetCPUNum() ) {
+               // TODO: Backtrace to IRQ
+               Log("  IRQ %016llx", Thread->SavedState.UserRIP);
+       }
+       else {
+               Log("  At %016llx, SP=%016llx", Thread->SavedState.RIP, Thread->SavedState.RSP);
+               Log("  User %04x:%016llx", Thread->SavedState.UserCS, Thread->SavedState.UserRIP);
+       }
 }
 
 void Proc_Reschedule(void)
@@ -825,5 +833,14 @@ void Proc_Scheduler(int CPU, Uint RSP, Uint RIP)
 #endif
 }
 
+Uint Proc_int_SetIRQIP(Uint RIP)
+{
+        int    cpu = GetCPUNum();
+       tThread *thread = gaCPUs[cpu].Current;
+       Uint    rv = thread->SavedState.UserRIP;
+       thread->SavedState.UserRIP = RIP;
+       return rv;
+}
+
 // === EXPORTS ===
 EXPORT(Proc_SpawnWorker);