1 files changed, 38 insertions, 0 deletions
diff --git a/usr/klibc/arch/sparc/setjmp.S b/usr/klibc/arch/sparc/setjmp.S
new file mode 100644
index 0000000..038ea78
--- /dev/null
+++ b/usr/klibc/arch/sparc/setjmp.S
@@ -0,0 +1,38 @@
+!
+! setjmp.S
+!
+! Basic setjmp/longjmp
+!
+! This code was based on the equivalent code in NetBSD
+!
+
+#include <machine/asm.h>
+#include <machine/trap.h>
+
+!
+! The jmp_buf contains the following entries:
+!   sp
+!   fp
+!   pc
+!
+ENTRY(setjmp)
+	st	%sp,[%o0+0]	! Callers stack pointer
+	st	%o7,[%o0+4]	! Return pc
+	st	%fp,[%o0+8]	! Frame pointer
+	retl			! Return
+	 clr	%o0		!  ...0
+
+ENTRY(longjmp)
+	sub	%sp, 64, %sp	! set up a local stack frame
+0:
+	t	ST_FLUSHWIN	! flush register windows out to memory
+	!
+	! We restore the saved stack pointer to %fp, then issue
+	! a restore instruction which will reload the register
+	! window from the stack.
+	!
+        ld      [%o0+4], %o7    /* restore return pc */
+        ld      [%o0+0], %fp    /* and stack pointer */
+
+        retl                    ! success, return %g6
+         restore        %o1, 0, %o0