diff options
Diffstat (limited to 'lib/libc/powerpc/gen/setjmp.S')
| -rw-r--r-- | lib/libc/powerpc/gen/setjmp.S | 132 |
1 files changed, 132 insertions, 0 deletions
diff --git a/lib/libc/powerpc/gen/setjmp.S b/lib/libc/powerpc/gen/setjmp.S new file mode 100644 index 000000000000..0db3c4de6641 --- /dev/null +++ b/lib/libc/powerpc/gen/setjmp.S @@ -0,0 +1,132 @@ +/*- + * 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> +#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 */ + stmw %r9,20(%r6) + + /* FPRs */ + stfd %f14,112+0*8(%r6) + stfd %f15,112+1*8(%r6) + stfd %f16,112+2*8(%r6) + stfd %f17,112+3*8(%r6) + stfd %f18,112+4*8(%r6) + stfd %f19,112+5*8(%r6) + stfd %f20,112+6*8(%r6) + stfd %f21,112+7*8(%r6) + stfd %f22,112+8*8(%r6) + stfd %f23,112+9*8(%r6) + stfd %f24,112+10*8(%r6) + stfd %f25,112+11*8(%r6) + stfd %f26,112+12*8(%r6) + stfd %f27,112+13*8(%r6) + stfd %f28,112+14*8(%r6) + stfd %f29,112+15*8(%r6) + stfd %f30,112+16*8(%r6) + stfd %f31,112+17*8(%r6) + + li %r3,0 /* return (0) */ + blr +END(setjmp) + + WEAK_REFERENCE(CNAME(__longjmp), longjmp) +ENTRY(__longjmp) + lmw %r9,20(%r3) /* restore regs */ + + /* FPRs */ + lfd %f14,112+0*8(%r3) + lfd %f15,112+1*8(%r3) + lfd %f16,112+2*8(%r3) + lfd %f17,112+3*8(%r3) + lfd %f18,112+4*8(%r3) + lfd %f19,112+5*8(%r3) + lfd %f20,112+6*8(%r3) + lfd %f21,112+7*8(%r3) + lfd %f22,112+8*8(%r3) + lfd %f23,112+9*8(%r3) + lfd %f24,112+10*8(%r3) + lfd %f25,112+11*8(%r3) + lfd %f26,112+12*8(%r3) + lfd %f27,112+13*8(%r3) + lfd %f28,112+14*8(%r3) + lfd %f29,112+15*8(%r3) + lfd %f30,112+16*8(%r3) + lfd %f31,112+17*8(%r3) + + mr %r6,%r4 /* save val param */ + mtlr %r11 /* r11 -> link reg */ + mtcr %r12 /* r12 -> condition reg */ + 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 +END(__longjmp) + + .section .note.GNU-stack,"",%progbits |