X-Git-Url: https://git.ucc.asn.au/?a=blobdiff_plain;f=Kernel%2Farch%2Fx86%2Ferrors.c;h=c66e49d193c268f3a2a26d0862ba336864c60a26;hb=dcebc16c576aa98eb6a33047f4c4b2b69b30a1bc;hp=3821281dc89b6d464f36762ac5b576f907c1ce8f;hpb=c575e49ea4543b45ccd2a47d57ec590ca995e707;p=tpg%2Facess2.git

diff --git a/Kernel/arch/x86/errors.c b/Kernel/arch/x86/errors.c
index 3821281d..c66e49d1 100644
--- a/Kernel/arch/x86/errors.c
+++ b/Kernel/arch/x86/errors.c
@@ -16,10 +16,13 @@ extern void	Threads_Dump(void);
 extern void	Threads_Fault(int Num);
 extern int	GetCPUNum(void);
 extern void	MM_DumpTables(tVAddr, tVAddr);
+extern void	Proc_EnableSSE(void);
+extern void	Proc_RestoreSSE(Uint32 Data);
 
 // === PROTOTYPES ===
 void	__stack_chk_fail(void);
 void	ErrorHandler(tRegs *Regs);
+void	Proc_PrintBacktrace(void);
 void	Error_Backtrace(Uint eip, Uint ebp);
 void	StartupPrint(char *Str);
 
@@ -81,6 +84,24 @@ void ErrorHandler(tRegs *Regs)
 		MM_PageFault( cr, Regs->err_code, Regs );
 		return ;
 	}
+
+	// #NM - Coprocessor unavaliable
+	if(Regs->int_num == 7)
+	{
+		tThread	*thread = Proc_GetCurThread();
+		if(!thread->SavedState.bSSEModified)
+		{
+			Proc_EnableSSE();
+			if(!thread->SavedState.SSE)
+				thread->SavedState.SSE = malloc(sizeof(tSSEState) + 0xF);
+			else
+				Proc_RestoreSSE( ((Uint)thread->SavedState.SSE + 0xF) & ~0xF );
+			thread->SavedState.bSSEModified = 1;
+			__asm__ __volatile__ ("sti");
+			return ;
+		}
+		// oops, SSE enabled but a #NM, bad news
+	}
 	
 	// VM8086 GPF
 	if(Regs->int_num == 13 && Regs->eflags & 0x20000)
@@ -160,6 +181,14 @@ void ErrorHandler(tRegs *Regs)
 	
 	for(;;)	__asm__ __volatile__ ("hlt");
 }
+
+void Proc_PrintBacktrace(void)
+{
+	Uint32	ebp;
+	__asm__ __volatile__ ("mov %%ebp, %0" : "=r" (ebp));
+	Error_Backtrace( *(Uint32*)(ebp+4), *(Uint32*)ebp );
+}
+
 /**
  * \fn void Error_Backtrace(Uint eip, Uint ebp)
  * \brief Unrolls the stack to trace execution