diff options
Diffstat (limited to 'lib/libc/ia64/gen/signalcontext.c')
| -rw-r--r-- | lib/libc/ia64/gen/signalcontext.c | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/lib/libc/ia64/gen/signalcontext.c b/lib/libc/ia64/gen/signalcontext.c deleted file mode 100644 index b47daf3..0000000 --- a/lib/libc/ia64/gen/signalcontext.c +++ /dev/null @@ -1,123 +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/types.h> -#include <sys/ucontext.h> -#include <machine/fpu.h> -#include <signal.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> -#include <strings.h> - -struct fdesc { - uint64_t ip; - uint64_t gp; -}; - -typedef void (*handler_t)(uint64_t, uint64_t, uint64_t); - -static __inline uint64_t * -spill(uint64_t *bsp, uint64_t arg) -{ - *bsp++ = arg; - if (((intptr_t)bsp & 0x1ff) == 0x1f8) - *bsp++ = 0; - return (bsp); -} - -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 */ -} - -__weak_reference(__signalcontext, signalcontext); - -int -__signalcontext(ucontext_t *ucp, int sig, __sighandler_t *func) -{ - uint64_t *args, *bsp; - 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 (memory) stack. We only need 3 arguments, but - * we create room for 4 so that we are 16-byte aligned. - */ - sp = (ucp->uc_mcontext.mc_special.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; - - /* - * Push (spill) the arguments of the context wrapper onto the register - * stack. They get loaded by the RSE on a context switch. - */ - bsp = (uint64_t*)ucp->uc_mcontext.mc_special.bspstore; - bsp = spill(bsp, (intptr_t)ucp); - bsp = spill(bsp, (intptr_t)func); - bsp = spill(bsp, (intptr_t)args); - - /* - * Setup the ucontext of the signal handler. - */ - memset(&ucp->uc_mcontext, 0, sizeof(ucp->uc_mcontext)); - ucp->uc_link = sig_uc; - sigdelset(&ucp->uc_sigmask, sig); - ucp->uc_mcontext.mc_special.sp = (intptr_t)args - 16; - ucp->uc_mcontext.mc_special.bspstore = (intptr_t)bsp; - ucp->uc_mcontext.mc_special.pfs = (3 << 7) | 3; - ucp->uc_mcontext.mc_special.rsc = 0xf; - ucp->uc_mcontext.mc_special.rp = ((struct fdesc*)ctx_wrapper)->ip; - ucp->uc_mcontext.mc_special.gp = ((struct fdesc*)ctx_wrapper)->gp; - ucp->uc_mcontext.mc_special.fpsr = IA64_FPSR_DEFAULT; - return (0); -} |
