Changeset 4491338 in mainline

Timestamp:

2009-12-13T20:01:38Z (14 years ago)

Author:

Jakub Jermar <jakub@…>

Branches:

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

Children:

47a350f

Parents:

963dd91

Message:

Recognize the Division Error fault on ia32 and amd64.
Now when an application divides e.g. by zero, it will be killed with an
appropriate message (i.e. "Division error.") instead of dummy
"Unserviced interrupt: 0".

Location:

kernel/arch

Files:

• amd64/src/interrupt.c (modified) (2 diffs)
• ia32/src/interrupt.c (modified) (2 diffs)

kernel/arch/amd64/src/interrupt.c

@@ -98 +98 @@
 }
 
+static void de_fault(int n, istate_t *istate)
+{
+        fault_if_from_uspace(istate, "Divide error.");
+        decode_istate(n, istate);
+        panic("Divide error.");
+}
+
 /** General Protection Fault. */
 static void gp_fault(int n, istate_t *istate)
@@ -200 +207 @@
         }
         
+        exc_register(0, "de_fault", (iroutine) de_fault);
         exc_register(7, "nm_fault", (iroutine) nm_fault);
         exc_register(12, "ss_fault", (iroutine) ss_fault);

kernel/arch/ia32/src/interrupt.c

@@ -98 +98 @@
 }
 
+static void de_fault(int n, istate_t *istate)
+{
+        fault_if_from_uspace(istate, "Divide error.");
+
+        decode_istate(istate);
+        panic("Divide error.");
+}
+
 /** General Protection Fault. */
 static void gp_fault(int n __attribute__((unused)), istate_t *istate)
@@ -215 +223 @@
         }
         
+        exc_register(0, "de_fault", (iroutine) de_fault);
         exc_register(7, "nm_fault", (iroutine) nm_fault);
         exc_register(12, "ss_fault", (iroutine) ss_fault);