Changeset a218709 in mainline for kernel/arch/sparc32/src/exception.c

Timestamp:

2013-12-02T23:45:45Z (11 years ago)

Author:

Jakub Klama <jakub.klama@…>

Branches:

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

Children:

2955bb9

Parents:

3bc42bd

Message:

Implement new userspace window trap mechanism, which utilizes MMU probe
to choose between slow (preemptive, involving inserting stack page mapping)
and fast (direct) handlers.

File:

• kernel/arch/sparc32/src/exception.c (modified) (2 diffs)

kernel/arch/sparc32/src/exception.c

@@ -39 +39 @@
 #include <arch/istate.h>
 #include <arch/exception.h>
+#include <arch/regwin.h>
 #include <syscall/syscall.h>
 #include <interrupt.h>
 #include <arch/asm.h>
+#include <mm/frame.h>
+#include <mm/page.h>
+#include <mm/as.h>
+#include <memstr.h>
 #include <debug.h>
 #include <print.h>
@@ -142 +147 @@
 sysarg_t syscall(sysarg_t a1, sysarg_t a2, sysarg_t a3, sysarg_t a4, sysarg_t a5, sysarg_t a6, sysarg_t id)
 {
-        printf("syscall %d\n", id);
-        printf("args: 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n", a1, a2, a3, a4, a5, a6);
+//      printf("syscall %d\n", id);
+//      printf("args: 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x 0x%08x\n", a1, a2, a3, a4, a5, a6);
+        if (id == 0x4f) {
+            flush_windows();
+            return 0;
+        }
+    
         return syscall_handler(a1, a2, a3, a4, a5, a6, id);
+}
+
+void preemptible_save_uspace(uintptr_t sp, istate_t *istate)
+{
+        as_page_fault(sp, PF_ACCESS_WRITE, istate);
+}
+
+void preemptible_restore_uspace(uintptr_t sp, istate_t *istate)
+{
+        as_page_fault(sp, PF_ACCESS_WRITE, istate);
 }