date and time created 92/02/29 12:40:57 by bostic

SCCS-vsn: lib/libc/mips/gen/_setjmp.s 5.1

diff --git a/usr/src/lib/libc/mips/gen/_setjmp.s b/usr/src/lib/libc/mips/gen/_setjmp.s
new file mode 100644 (file)
index 0000000..f626426
--- /dev/null
+++ b/usr/src/lib/libc/mips/gen/_setjmp.s
@@ -0,0 +1,94 @@
+/*-
+ * Copyright (c) 1991 The Regents of the University of California.
+ * All rights reserved.
+ *
+ * This code is derived from software contributed to Berkeley by
+ * Ralph Campbell.
+ *
+ * %sccs.include.redist.c%
+ */
+
+#if defined(LIBC_SCCS) && !defined(lint)
+       ASMSTR("@(#)_setjmp.s   5.1 (Berkeley) %G%")
+#endif /* LIBC_SCCS and not lint */
+
+#include <machine/reg.h>
+#include "DEFS.h"
+
+/*
+ * C library -- _setjmp, _longjmp
+ *
+ *     _longjmp(a,v)
+ * will generate a "return(v)" from
+ * the last call to
+ *     _setjmp(a)
+ * by restoring registers from the stack,
+ * The previous signal state is NOT restored.
+ */
+
+LEAF(_setjmp)
+       li      v0, 0xACEDBADE                  # sigcontext magic number
+       sw      ra, (2 * 4)(a0)                 # sc_pc = return address
+       sw      v0, (3 * 4)(a0)                 #   saved in sc_regs[0]
+       sw      s0, ((S0 + 3) * 4)(a0)
+       sw      s1, ((S1 + 3) * 4)(a0)
+       sw      s2, ((S2 + 3) * 4)(a0)
+       sw      s3, ((S3 + 3) * 4)(a0)
+       sw      s4, ((S4 + 3) * 4)(a0)
+       sw      s5, ((S5 + 3) * 4)(a0)
+       sw      s6, ((S6 + 3) * 4)(a0)
+       sw      s7, ((S7 + 3) * 4)(a0)
+       sw      sp, ((SP + 3) * 4)(a0)
+       sw      s8, ((S8 + 3) * 4)(a0)
+       cfc1    v0, $31                         # too bad can't check if FP used
+       swc1    $f20, ((20 + 38) * 4)(a0)
+       swc1    $f21, ((21 + 38) * 4)(a0)
+       swc1    $f22, ((22 + 38) * 4)(a0)
+       swc1    $f23, ((23 + 38) * 4)(a0)
+       swc1    $f24, ((24 + 38) * 4)(a0)
+       swc1    $f25, ((25 + 38) * 4)(a0)
+       swc1    $f26, ((26 + 38) * 4)(a0)
+       swc1    $f27, ((27 + 38) * 4)(a0)
+       swc1    $f28, ((28 + 38) * 4)(a0)
+       swc1    $f29, ((29 + 38) * 4)(a0)
+       swc1    $f30, ((30 + 38) * 4)(a0)
+       swc1    $f31, ((31 + 38) * 4)(a0)
+       sw      v0, ((32 + 38) * 4)(a0)
+       move    v0, zero
+       j       ra
+END(_setjmp)
+
+LEAF(_longjmp)
+       lw      v0, (3 * 4)(a0)                 # get magic number
+       bne     v0, 0xACEDBADE, botch           # jump if error
+       lw      ra, (2 * 4)(a0)
+       lw      s0, ((S0 + 3) * 4)(a0)
+       lw      s1, ((S1 + 3) * 4)(a0)
+       lw      s2, ((S2 + 3) * 4)(a0)
+       lw      s3, ((S3 + 3) * 4)(a0)
+       lw      s4, ((S4 + 3) * 4)(a0)
+       lw      s5, ((S5 + 3) * 4)(a0)
+       lw      s6, ((S6 + 3) * 4)(a0)
+       lw      s7, ((S7 + 3) * 4)(a0)
+       lw      sp, ((SP + 3) * 4)(a0)
+       lw      s8, ((S8 + 3) * 4)(a0)
+       lw      v0, ((32 + 38) * 4)(a0)         # get fpu status
+       ctc1    v0, $31
+       lwc1    $f20, ((20 + 38) * 4)(a0)
+       lwc1    $f21, ((21 + 38) * 4)(a0)
+       lwc1    $f22, ((22 + 38) * 4)(a0)
+       lwc1    $f23, ((23 + 38) * 4)(a0)
+       lwc1    $f24, ((24 + 38) * 4)(a0)
+       lwc1    $f25, ((25 + 38) * 4)(a0)
+       lwc1    $f26, ((26 + 38) * 4)(a0)
+       lwc1    $f27, ((27 + 38) * 4)(a0)
+       lwc1    $f28, ((28 + 38) * 4)(a0)
+       lwc1    $f29, ((29 + 38) * 4)(a0)
+       lwc1    $f30, ((30 + 38) * 4)(a0)
+       lwc1    $f31, ((31 + 38) * 4)(a0)
+       move    v0, a1
+       j       ra
+botch:
+       jal     longjmperror
+       jal     abort
+END(_longjmp)