diff options
Diffstat (limited to 'lib/libc/ia64/gen/makecontext.c')
-rw-r--r-- | lib/libc/ia64/gen/makecontext.c | 123 |
1 files changed, 0 insertions, 123 deletions
diff --git a/lib/libc/ia64/gen/makecontext.c b/lib/libc/ia64/gen/makecontext.c deleted file mode 100644 index bee47f1..0000000 --- a/lib/libc/ia64/gen/makecontext.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 <stdarg.h> -#include <stdio.h> -#include <stdlib.h> -#include <string.h> - -struct fdesc { - uint64_t ip; - uint64_t gp; -}; - -typedef void (*func_t)(uint64_t, uint64_t, uint64_t, uint64_t, uint64_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, func_t func, uint64_t *args) -{ - - (*func)(args[0], args[1], args[2], args[3], args[4], args[5], args[6], - args[7]); - if (ucp->uc_link == NULL) - exit(0); - setcontext((const ucontext_t *)ucp->uc_link); - /* should never get here */ - abort(); - /* NOTREACHED */ -} - -__weak_reference(__makecontext, makecontext); - -void -__makecontext(ucontext_t *ucp, void (*func)(void), int argc, ...) -{ - uint64_t *args, *bsp; - va_list ap; - int i; - - /* - * Drop the ball completely if something's not right. We only - * support general registers as arguments and not more than 8 - * of them. Things get hairy if we need to support FP registers - * (alignment issues) or more than 8 arguments (stack based). - */ - if (argc < 0 || argc > 8 || ucp == NULL || - ucp->uc_stack.ss_sp == NULL || (ucp->uc_stack.ss_size & 15) || - ((intptr_t)ucp->uc_stack.ss_sp & 15) || - ucp->uc_stack.ss_size < MINSIGSTKSZ) - abort(); - - /* - * Copy the arguments of function 'func' onto the (memory) stack. - * Always take up space for 8 arguments. - */ - va_start(ap, argc); - args = (uint64_t*)(ucp->uc_stack.ss_sp + ucp->uc_stack.ss_size) - 8; - i = 0; - while (i < argc) - args[i++] = va_arg(ap, uint64_t); - while (i < 8) - args[i++] = 0; - va_end(ap); - - /* - * 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_stack.ss_sp; - bsp = spill(bsp, (intptr_t)ucp); - bsp = spill(bsp, (intptr_t)func); - bsp = spill(bsp, (intptr_t)args); - - /* - * Setup the MD portion of the context. - */ - memset(&ucp->uc_mcontext, 0, sizeof(ucp->uc_mcontext)); - 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; -} |