diff options
Diffstat (limited to 'lib/libc/ia64/gen/setjmp.S')
| -rw-r--r-- | lib/libc/ia64/gen/setjmp.S | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/lib/libc/ia64/gen/setjmp.S b/lib/libc/ia64/gen/setjmp.S new file mode 100644 index 0000000..0ba630b --- /dev/null +++ b/lib/libc/ia64/gen/setjmp.S @@ -0,0 +1,89 @@ +/* $NetBSD: setjmp.S,v 1.3 1997/12/05 02:06:27 thorpej Exp $ */ +/* $FreeBSD$ */ + +/* + * Copyright (c) 1994, 1995 Carnegie-Mellon University. + * All rights reserved. + * + * Author: Chris G. Demetriou + * + * Permission to use, copy, modify and distribute this software and + * its documentation is hereby granted, provided that both the copyright + * notice and this permission notice appear in all copies of the + * software, derivative works or modified versions, and any portions + * thereof, and that both notices appear in supporting documentation. + * + * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" + * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND + * FOR ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. + * + * Carnegie Mellon requests users of this software to return to + * + * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU + * School of Computer Science + * Carnegie Mellon University + * Pittsburgh PA 15213-3890 + * + * any improvements or extensions that they make and grant Carnegie the + * rights to redistribute these changes. + */ + +#define LOCORE +#include <machine/asm.h> +#include <machine/setjmp.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, + * and the previous signal state. + */ + +ENTRY(setjmp, 1) + alloc loc0=ar.pfs,1,2,3,0 + mov loc1=rp + // + // Compensate for the pointer twiddling that setjmp does. + // + dep r14=r0,r32,0,4 + ;; + mov out0=1 // how = SIG_BLOCK + mov out1=0 // set = NULL + add out2=J_SIG0+0x10,r14 // oset = &jb[J_SIG0] + br.call.sptk.few rp=__sys_sigprocmask + ;; + mov rp=loc1 + mov r14=loc0 + ;; + alloc r15=ar.pfs,1,0,0,0 // drop register frame + ;; + mov ar.pfs=r14 // restore ar.pfs + br.sptk.many _setjmp // finish saving state +END(setjmp) + + WEAK_ALIAS(longjmp,__longjmp) +ENTRY(__longjmp, 2) + alloc loc0=ar.pfs,2,2,3,0 + mov loc1=rp + // + // Compensate for the pointer twiddling that setjmp does. + // + dep r14=r0,r32,0,4 + ;; + mov out0=3 // how = SIG_SETMASK + add out1=J_SIG0+0x10,r14 // set = &jb[J_SIG0] + mov out2=0 // oset = NULL + br.call.sptk.few rp=__sys_sigprocmask + ;; + mov rp=loc1 + mov r14=loc0 + ;; + alloc r15=ar.pfs,2,0,0,0 // drop register frame + ;; + mov ar.pfs=r14 // restore ar.pfs + br.sptk.many _longjmp // finish restoring state +END(__longjmp) |
