diff options
Diffstat (limited to 'lib/libc/powerpc64/gen/setjmp.S')
| -rw-r--r-- | lib/libc/powerpc64/gen/setjmp.S | 140 |
1 files changed, 140 insertions, 0 deletions
diff --git a/lib/libc/powerpc64/gen/setjmp.S b/lib/libc/powerpc64/gen/setjmp.S new file mode 100644 index 0000000..0f33ab2 --- /dev/null +++ b/lib/libc/powerpc64/gen/setjmp.S @@ -0,0 +1,140 @@ +/*- + * Copyright (c) 2002 Peter Grehan. + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ +/* $NetBSD: setjmp.S,v 1.3 1998/10/03 12:30:38 tsubai Exp $ */ + +#include <machine/asm.h> +__FBSDID("$FreeBSD$"); + +#include <sys/syscall.h> + +/* + * C library -- setjmp, longjmp + * + * longjmp(a,v) + * will generate a "return(v?v:1)" from the last call to + * setjmp(a) + * by restoring registers from the stack. + * The previous signal state is restored. + * + * jmpbuf layout: + * +------------+ + * | unused | + * +------------+ + * | sig state | + * | | + * | (4 words) | + * | | + * +------------+ + * | saved regs | + * | ... | + */ + +ENTRY(setjmp) + mr %r6,%r3 + li %r3,1 /* SIG_BLOCK, but doesn't matter */ + /* since set == NULL */ + li %r4,0 /* set = NULL */ + mr %r5,%r6 /* &oset */ + addi %r5,%r5,4 + li %r0, SYS_sigprocmask /*sigprocmask(SIG_BLOCK, NULL, &oset)*/ + sc /*assume no error XXX */ + mflr %r11 /* r11 <- link reg */ + mfcr %r12 /* r12 <- condition reg */ + mr %r10,%r1 /* r10 <- stackptr */ + mr %r9,%r2 /* r9 <- global ptr */ + + std %r9,40 + 0*8(%r6) + std %r10,40 + 1*8(%r6) + std %r11,40 + 2*8(%r6) + std %r12,40 + 3*8(%r6) + std %r13,40 + 4*8(%r6) + std %r14,40 + 5*8(%r6) + std %r15,40 + 6*8(%r6) + std %r16,40 + 7*8(%r6) + std %r17,40 + 8*8(%r6) + std %r18,40 + 9*8(%r6) + std %r19,40 + 10*8(%r6) + std %r20,40 + 11*8(%r6) + std %r21,40 + 12*8(%r6) + std %r22,40 + 13*8(%r6) + std %r23,40 + 14*8(%r6) + std %r24,40 + 15*8(%r6) + std %r25,40 + 16*8(%r6) + std %r26,40 + 17*8(%r6) + std %r27,40 + 18*8(%r6) + std %r28,40 + 19*8(%r6) + std %r29,40 + 20*8(%r6) + std %r30,40 + 21*8(%r6) + std %r31,40 + 22*8(%r6) + + li %r3,0 /* return (0) */ + blr + + .weak CNAME(longjmp) + .set CNAME(longjmp),CNAME(__longjmp) + .weak CNAME(.longjmp) + .set CNAME(.longjmp),CNAME(.__longjmp) +ENTRY(__longjmp) + ld %r9,40 + 0*8(%r3) + ld %r10,40 + 1*8(%r3) + ld %r11,40 + 2*8(%r3) + ld %r12,40 + 3*8(%r3) + ld %r13,40 + 4*8(%r3) + ld %r14,40 + 5*8(%r3) + ld %r15,40 + 6*8(%r3) + ld %r16,40 + 7*8(%r3) + ld %r17,40 + 8*8(%r3) + ld %r18,40 + 9*8(%r3) + ld %r19,40 + 10*8(%r3) + ld %r20,40 + 11*8(%r3) + ld %r21,40 + 12*8(%r3) + ld %r22,40 + 13*8(%r3) + ld %r23,40 + 14*8(%r3) + ld %r24,40 + 15*8(%r3) + ld %r25,40 + 16*8(%r3) + ld %r26,40 + 17*8(%r3) + ld %r27,40 + 18*8(%r3) + ld %r28,40 + 19*8(%r3) + ld %r29,40 + 20*8(%r3) + ld %r30,40 + 21*8(%r3) + ld %r31,40 + 22*8(%r3) + mr %r6,%r4 /* save val param */ + mtlr %r11 /* r11 -> link reg */ + mtcr %r12 /* r12 -> condition reg */ + mr %r2,%r9 /* r9 -> global ptr */ + mr %r1,%r10 /* r10 -> stackptr */ + mr %r4,%r3 + li %r3,3 /* SIG_SETMASK */ + addi %r4,%r4,4 /* &set */ + li %r5,0 /* oset = NULL */ + li %r0,SYS_sigprocmask /* sigprocmask(SIG_SET, &set, NULL) */ + sc /* assume no error XXX */ + or. %r3,%r6,%r6 + bnelr + li %r3,1 + blr + + .section .note.GNU-stack,"",%progbits |
