diff options
Diffstat (limited to 'sys/arch/amd64/amd64/syscall.c')
| -rw-r--r-- | sys/arch/amd64/amd64/syscall.c | 219 |
1 files changed, 0 insertions, 219 deletions
diff --git a/sys/arch/amd64/amd64/syscall.c b/sys/arch/amd64/amd64/syscall.c deleted file mode 100644 index c30b6dc1b4d..00000000000 --- a/sys/arch/amd64/amd64/syscall.c +++ /dev/null @@ -1,219 +0,0 @@ -/* $OpenBSD: syscall.c,v 1.19 2011/07/11 15:40:47 guenther Exp $ */ -/* $NetBSD: syscall.c,v 1.1 2003/04/26 18:39:32 fvdl Exp $ */ - -/*- - * Copyright (c) 1998, 2000 The NetBSD Foundation, Inc. - * All rights reserved. - * - * This code is derived from software contributed to The NetBSD Foundation - * by Charles M. Hannum. - * - * 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 NETBSD FOUNDATION, INC. AND CONTRIBUTORS - * ``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 FOUNDATION OR CONTRIBUTORS - * 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/param.h> -#include <sys/systm.h> -#include <sys/proc.h> -#include <sys/signal.h> -#ifdef KTRACE -#include <sys/ktrace.h> -#endif - -#include "systrace.h" -#include <dev/systrace.h> - -#include <sys/syscall.h> - -#include <uvm/uvm_extern.h> - -#include <machine/cpu.h> -#include <machine/psl.h> -#include <machine/userret.h> - -void syscall(struct trapframe *); - -/* - * syscall(frame): - * System call request from POSIX system call gate interface to kernel. - */ -void -syscall(struct trapframe *frame) -{ - caddr_t params; - const struct sysent *callp; - struct proc *p; - int error; - int nsys; - size_t argsize, argoff; - register_t code, args[9], rval[2], *argp; - int lock; - - uvmexp.syscalls++; - p = curproc; - - code = frame->tf_rax; - callp = p->p_emul->e_sysent; - nsys = p->p_emul->e_nsysent; - argp = &args[0]; - argoff = 0; - - switch (code) { - case SYS_syscall: - case SYS___syscall: - /* - * Code is first argument, followed by actual args. - */ - code = frame->tf_rdi; - argp = &args[1]; - argoff = 1; - break; - default: - break; - } - - if (code < 0 || code >= nsys) - callp += p->p_emul->e_nosys; - else - callp += code; - - argsize = (callp->sy_argsize >> 3) + argoff; - if (argsize) { - switch (MIN(argsize, 6)) { - case 6: - args[5] = frame->tf_r9; - case 5: - args[4] = frame->tf_r8; - case 4: - args[3] = frame->tf_r10; - case 3: - args[2] = frame->tf_rdx; - case 2: - args[1] = frame->tf_rsi; - case 1: - args[0] = frame->tf_rdi; - break; - default: - panic("impossible syscall argsize"); - } - if (argsize > 6) { - argsize -= 6; - params = (caddr_t)frame->tf_rsp + sizeof(register_t); - error = copyin(params, (caddr_t)&args[6], - argsize << 3); - if (error != 0) - goto bad; - } - } - - lock = !(callp->sy_flags & SY_NOLOCK); - -#ifdef SYSCALL_DEBUG - KERNEL_LOCK(); - scdebug_call(p, code, argp); - KERNEL_UNLOCK(); -#endif -#ifdef KTRACE - if (KTRPOINT(p, KTR_SYSCALL)) { - KERNEL_LOCK(); - ktrsyscall(p, code, callp->sy_argsize, argp); - KERNEL_UNLOCK(); - } -#endif - rval[0] = 0; - rval[1] = frame->tf_rdx; -#if NSYSTRACE > 0 - if (ISSET(p->p_flag, P_SYSTRACE)) { - KERNEL_LOCK(); - error = systrace_redirect(code, p, argp, rval); - KERNEL_UNLOCK(); - } else -#endif - { - if (lock) - KERNEL_LOCK(); - error = (*callp->sy_call)(p, argp, rval); - if (lock) - KERNEL_UNLOCK(); - } - switch (error) { - case 0: - frame->tf_rax = rval[0]; - frame->tf_rdx = rval[1]; - frame->tf_rflags &= ~PSL_C; /* carry bit */ - break; - case ERESTART: - /* - * The offset to adjust the PC by depends on whether we entered - * the kernel through the trap or call gate. We pushed the - * size of the instruction into tf_err on entry. - */ - frame->tf_rip -= frame->tf_err; - break; - case EJUSTRETURN: - /* nothing to do */ - break; - default: - bad: - frame->tf_rax = error; - frame->tf_rflags |= PSL_C; /* carry bit */ - break; - } - -#ifdef SYSCALL_DEBUG - KERNEL_LOCK(); - scdebug_ret(p, code, error, rval); - KERNEL_UNLOCK(); -#endif - userret(p); -#ifdef KTRACE - if (KTRPOINT(p, KTR_SYSRET)) { - KERNEL_LOCK(); - ktrsysret(p, code, error, rval[0]); - KERNEL_UNLOCK(); - } -#endif -} - -void -child_return(void *arg) -{ - struct proc *p = arg; - struct trapframe *tf = p->p_md.md_regs; - - tf->tf_rax = 0; - tf->tf_rdx = 1; - tf->tf_rflags &= ~PSL_C; - - KERNEL_UNLOCK(); - - userret(p); -#ifdef KTRACE - if (KTRPOINT(p, KTR_SYSRET)) { - KERNEL_LOCK(); - ktrsysret(p, - (p->p_flag & P_THREAD) ? SYS_rfork : - (p->p_p->ps_flags & PS_PPWAIT) ? SYS_vfork : SYS_fork, - 0, 0); - KERNEL_UNLOCK(); - } -#endif -} |