diff options
Diffstat (limited to 'usr/src/lib/libbc/libc/sys/common/sigsetjmp.c')
| -rw-r--r-- | usr/src/lib/libbc/libc/sys/common/sigsetjmp.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/usr/src/lib/libbc/libc/sys/common/sigsetjmp.c b/usr/src/lib/libbc/libc/sys/common/sigsetjmp.c new file mode 100644 index 0000000000..fab2911048 --- /dev/null +++ b/usr/src/lib/libbc/libc/sys/common/sigsetjmp.c @@ -0,0 +1,153 @@ +/* + * CDDL HEADER START + * + * The contents of this file are subject to the terms of the + * Common Development and Distribution License, Version 1.0 only + * (the "License"). You may not use this file except in compliance + * with the License. + * + * You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE + * or http://www.opensolaris.org/os/licensing. + * See the License for the specific language governing permissions + * and limitations under the License. + * + * When distributing Covered Code, include this CDDL HEADER in each + * file and include the License file at usr/src/OPENSOLARIS.LICENSE. + * If applicable, add the following below this CDDL HEADER, with the + * fields enclosed by brackets "[]" replaced with your own identifying + * information: Portions Copyright [yyyy] [name of copyright owner] + * + * CDDL HEADER END + */ +/* Copyright (c) 1988 AT&T */ +/* All Rights Reserved */ + + +/* + * Copyright 2004 Sun Microsystems, Inc. All rights reserved. + * Use is subject to license terms. + */ + +#pragma ident "%Z%%M% %I% %E% SMI" + + +#include <sys/setjmp.h> +#include "ucontext.h" + +int _getsp(); + +int +sigsetjmp(env, savemask) + sigjmp_buf env; + int savemask; +{ + register o_setjmp_struct_t *bp = (o_setjmp_struct_t *)env; + register int sp = _getsp(); + ucontext_t uc; + + /* + * Get the current machine context. + */ + uc.uc_flags = UC_STACK | UC_SIGMASK; + __getcontext(&uc); + + /* + * Note that the pc and former sp (fp) from the stack are valid + * because the call to __getcontext must flush the user windows + * to the stack. + */ + bp->sjs_flags = 0; + bp->sjs_sp = *((int *)sp+14); + bp->sjs_pc = *((int *)sp+15) + 0x8; + bp->sjs_stack = uc.uc_stack; + + if (savemask) { + /* save the mask */ + bp->sjs_flags |= JB_SAVEMASK; + memcpy(bp->sjs_sigmask, &(uc.uc_sigmask), 3 * sizeof (int)); + } else { + memset(bp->sjs_sigmask, 0, 3 * sizeof (int)); + } + + return (0); +} + + +void +siglongjmp(env, val) + sigjmp_buf env; + int val; +{ + o_setjmp_struct_t *bp = (o_setjmp_struct_t *)env; + setjmp_struct_t sjmp, *sp; + + sp = &sjmp; + sp->sjs_flags = bp->sjs_flags; + sp->sjs_sp = bp->sjs_sp; + sp->sjs_pc = bp->sjs_pc; + sp->sjs_fp = 0; + sp->sjs_i7 = 0; + sp->sjs_uclink = 0; + sp->sjs_sigmask[0] = bp->sjs_sigmask[0]; + sp->sjs_sigmask[1] = bp->sjs_sigmask[1]; + sp->sjs_sigmask[2] = bp->sjs_sigmask[2]; + sp->sjs_sigmask[3] = 0; + sp->sjs_stack = bp->sjs_stack; + + _siglongjmp(sjmp, val); +} + +int +_setjmp(env) + jmp_buf env; +{ + register o_setjmp_struct_t *bp = (o_setjmp_struct_t *)env; + register int sp = _getsp(); + ucontext_t uc; + + /* + * Get the current machine context. + */ + uc.uc_flags = UC_STACK; + __getcontext(&uc); + + /* + * Note that the pc and former sp (fp) from the stack are valid + * because the call to __getcontext must flush the user windows + * to the stack. + */ + bp->sjs_flags = 0; + bp->sjs_sp = *((int *)sp+14); + bp->sjs_pc = *((int *)sp+15) + 0x8; + bp->sjs_sigmask[0] = 0; + bp->sjs_sigmask[1] = 0; + bp->sjs_sigmask[2] = 0; + bp->sjs_stack = uc.uc_stack; + + return (0); +} + + +void +_longjmp(env, val) + jmp_buf env; + int val; +{ + o_setjmp_struct_t *bp = (o_setjmp_struct_t *)env; + setjmp_struct_t sjmp, *sp; + + sp = &sjmp; + sp->sjs_flags = bp->sjs_flags; + sp->sjs_sp = bp->sjs_sp; + sp->sjs_pc = bp->sjs_pc; + sp->sjs_fp = 0; + sp->sjs_i7 = 0; + sp->sjs_uclink = 0; + sp->sjs_sigmask[0] = bp->sjs_sigmask[0]; + sp->sjs_sigmask[1] = bp->sjs_sigmask[1]; + sp->sjs_sigmask[2] = bp->sjs_sigmask[2]; + sp->sjs_sigmask[3] = 0; + sp->sjs_stack = bp->sjs_stack; + + _siglongjmp(sjmp, val); +} |