Changeset 1f12fab in mainline for kernel/arch/sparc32/src/exception.c

Timestamp:

2013-10-07T20:00:34Z (11 years ago)

Author:

Jakub Klama <jakub.klama@…>

Branches:

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

Children:

a73ebf0

Parents:

80d9d83

Message:

First attempt to implement preemptive trap handlers
and switch to userspace. Preemptive traps are needed
for at least page faults, as page fault handling code
can trigger window underflow/overflow exceptions.

This commit also introduces userspace window buffer
for saving userspace register windows (just as in
sparc64).

These changes are unfinished and far from working
correctly.

File:

• kernel/arch/sparc32/src/exception.c (modified) (4 diffs)

kernel/arch/sparc32/src/exception.c

@@ -48 +48 @@
 void instruction_access_exception(int n, istate_t *istate)
 {
-        fault_if_from_uspace(istate, "%s.", __func__);
-        panic_badtrap(istate, n, "%s.", __func__);
+        page_fault(n, istate);
+//      fault_if_from_uspace(istate, "%s.", __func__);
+//      panic_badtrap(istate, n, "%s.", __func__);
 }
 
@@ -104 +105 @@
 void data_access_exception(int n, istate_t *istate)
 {
-        fault_if_from_uspace(istate, "%s.", __func__);
-        panic_badtrap(istate, n, "%s.", __func__);
+        page_fault(n, istate);
+//      fault_if_from_uspace(istate, "%s.", __func__);
+//      panic_badtrap(istate, n, "%s.", __func__);
 }
 
@@ -111 +113 @@
 void data_access_error(int n, istate_t *istate)
 {
-        fault_if_from_uspace(istate, "%s.", __func__);
-        panic_badtrap(istate, n, "%s.", __func__);
+        page_fault(n, istate);
+//      fault_if_from_uspace(istate, "%s.", __func__);
+//      panic_badtrap(istate, n, "%s.", __func__);
 }
 
@@ -118 +121 @@
 void data_store_error(int n, istate_t *istate)
 {
-        fault_if_from_uspace(istate, "%s.", __func__);
-        panic_badtrap(istate, n, "%s.", __func__);
+        page_fault(n, istate);
+//      fault_if_from_uspace(istate, "%s.", __func__);
+//      panic_badtrap(istate, n, "%s.", __func__);
 }
 /** Handle data_access_error. (0x2c) */