Changeset 874621f in mainline for arch/ia32

Timestamp:

2006-06-06T07:40:51Z (20 years ago)

Author:

Ondrej Palkovsky <ondrap@…>

Branches:

lfn, master, serial, ticket/834-toolchain-update, topic/msim-upgrade, topic/simplify-dev-export

Children:

0dbc4e7

Parents:

6f9a9bc

Message:

Added kernel circular buffer klog.
Added automatic killing of tasks raising inappropriate exceptions.
TODO Fix vsnprintf return value(and behaviour according to specs) and remove workaround in klog.

Location:

arch/ia32

Files:

• include/interrupt.h (modified) (1 diff)
• src/interrupt.c (modified) (6 diffs)
• src/mm/page.c (modified) (1 diff)

arch/ia32/include/interrupt.h

@@ -84 +84 @@
 };
 
+/** Return true if exception happened while in userspace */
+static inline int istate_from_uspace(istate_t *istate)
+{
+        return !(istate->eip & 0x80000000);
+}
+
 static inline void istate_set_retaddr(istate_t *istate, __address retaddr)
 {
         istate->eip = retaddr;
+}
+
+static inline __native istate_get_pc(istate_t *istate)
+{
+        return istate->eip;
 }
 

arch/ia32/src/interrupt.c

@@ -80 +80 @@
 void null_interrupt(int n, istate_t *istate)
 {
+        fault_if_from_uspace(istate, "unserviced interrupt: %d", n);
+
         PRINT_INFO_ERRCODE(istate);
         panic("unserviced interrupt: %d\n", n);
@@ -105 +107 @@
                         return;
                 }
+                fault_if_from_uspace(istate, "general protection fault");
         }
 
@@ -113 +116 @@
 void ss_fault(int n, istate_t *istate)
 {
+        fault_if_from_uspace(istate, "stack fault");
+
         PRINT_INFO_ERRCODE(istate);
         panic("stack fault\n");
@@ -119 +124 @@
 void simd_fp_exception(int n, istate_t *istate)
 {
-
-        PRINT_INFO_ERRCODE(istate);
         __u32 mxcsr;
         asm
@@ -127 +130 @@
                 :"=m"(mxcsr)
         );
+        fault_if_from_uspace(istate, "SIMD FP exception(19), MXCSR: %#zX",
+                             (__native)mxcsr);
+
+        PRINT_INFO_ERRCODE(istate);
         printf("MXCSR: %#zX\n",(__native)(mxcsr));
         panic("SIMD FP exception(19)\n");
@@ -136 +143 @@
         scheduler_fpu_lazy_request();
 #else
+        fault_if_from_uspace(istate, "fpu fault");
         panic("fpu fault");
 #endif

arch/ia32/src/mm/page.c

@@ -104 +104 @@
 
         if (as_page_fault(page, access, istate) == AS_PF_FAULT) {
+                fault_if_from_uspace(istate, "Page fault: %#x", page);
+
                 PRINT_INFO_ERRCODE(istate);
                 printf("page fault address: %#x\n", page);