diff options
Diffstat (limited to 'lib/libc/alpha/gen/signalcontext.c')
| -rw-r--r-- | lib/libc/alpha/gen/signalcontext.c | 103 |
1 files changed, 0 insertions, 103 deletions
diff --git a/lib/libc/alpha/gen/signalcontext.c b/lib/libc/alpha/gen/signalcontext.c deleted file mode 100644 index a3f6397..0000000 --- a/lib/libc/alpha/gen/signalcontext.c +++ /dev/null @@ -1,103 +0,0 @@ -/* - * Copyright (c) 2003 Marcel Moolenaar - * 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 ``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 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. - */ - -#include <sys/cdefs.h> -__FBSDID("$FreeBSD$"); - -#include <sys/param.h> -#include <sys/ucontext.h> -#include <signal.h> -#include <stdlib.h> -#include <strings.h> - -typedef void (*handler_t)(uint64_t, uint64_t, uint64_t); - -/* Prototypes */ -static void ctx_wrapper(ucontext_t *ucp, handler_t func, uint64_t *args); - -__weak_reference(__signalcontext, signalcontext); - -int -__signalcontext(ucontext_t *ucp, int sig, __sighandler_t *func) -{ - uint64_t *args; - siginfo_t *sig_si; - ucontext_t *sig_uc; - uint64_t sp; - - /* Bail out if we don't have a valid ucontext pointer. */ - if (ucp == NULL) - abort(); - - /* - * Build a signal frame and copy the arguments of signal handler - * 'func' onto the stack. We only need 3 arguments, but we - * create room for 4 so that we are 16-byte aligned. - */ - sp = (ucp->uc_mcontext.mc_regs[FRAME_SP] - sizeof(ucontext_t)) & ~15UL; - sig_uc = (ucontext_t *)sp; - bcopy(ucp, sig_uc, sizeof(*sig_uc)); - sp = (sp - sizeof(siginfo_t)) & ~15UL; - sig_si = (siginfo_t *)sp; - bzero(sig_si, sizeof(*sig_si)); - sig_si->si_signo = sig; - sp -= 4 * sizeof(uint64_t); - args = (uint64_t *)sp; - args[0] = sig; - args[1] = (intptr_t)sig_si; - args[2] = (intptr_t)sig_uc; - args[3] = 0; - - /* - * Setup the ucontext of the signal handler. - */ - bzero(&ucp->uc_mcontext, sizeof(ucp->uc_mcontext)); - ucp->uc_link = sig_uc; - sigdelset(&ucp->uc_sigmask, sig); - - ucp->uc_mcontext.mc_format = _MC_REV0_TRAPFRAME; - ucp->uc_mcontext.mc_regs[FRAME_A0] = (register_t)ucp; - ucp->uc_mcontext.mc_regs[FRAME_A1] = (register_t)func; - ucp->uc_mcontext.mc_regs[FRAME_A1] = (register_t)args; - ucp->uc_mcontext.mc_regs[FRAME_SP] = (register_t)sp; - ucp->uc_mcontext.mc_regs[FRAME_PC] = (register_t)ctx_wrapper; - ucp->uc_mcontext.mc_regs[FRAME_RA] = (register_t)ctx_wrapper; - ucp->uc_mcontext.mc_regs[FRAME_T12] = (register_t)ctx_wrapper; - return (0); -} - -static void -ctx_wrapper(ucontext_t *ucp, handler_t func, uint64_t *args) -{ - - (*func)(args[0], args[1], args[2]); - if (ucp->uc_link == NULL) - exit(0); - setcontext((const ucontext_t *)ucp->uc_link); - /* should never get here */ - abort(); - /* NOTREACHED */ -} |
