patch-2.2.12 linux/arch/ppc/xmon/setjmp.c

• Lines: 30
• Date: Wed Aug 25 17:29:46 1999
• Orig file: v2.2.11/linux/arch/ppc/xmon/setjmp.c
• Orig date: Wed Dec 31 16:00:00 1969

diff -u --recursive --new-file v2.2.11/linux/arch/ppc/xmon/setjmp.c linux/arch/ppc/xmon/setjmp.c
@@ -0,0 +1,29 @@
+/*
+ * Copyright (C) 1996 Paul Mackerras.
+ *
+ * NB this file must be compiled with -O2.
+ */
+
+int
+xmon_setjmp(long *buf)
+{
+    asm ("mflr 0; stw 0,0(%0);"
+	 "stw 1,4(%0); stw 2,8(%0);"
+	 "mfcr 0; stw 0,12(%0);"
+	 "stmw 13,16(%0)"
+	 : : "r" (buf));
+    /* XXX should save fp regs as well */
+    return 0;
+}
+
+void
+xmon_longjmp(long *buf, int val)
+{
+    if (val == 0)
+	val = 1;
+    asm ("lmw 13,16(%0);"
+	 "lwz 0,12(%0); mtcrf 0x38,0;"
+	 "lwz 0,0(%0); lwz 1,4(%0); lwz 2,8(%0);"
+	 "mtlr 0; mr 3,%1"
+	 : : "r" (buf), "r" (val));
+}