2 * Copyright (C) 1994, David Greenman
3 * Copyright (c) 1990, 1993
4 * The Regents of the University of California. All rights reserved.
6 * This code is derived from software contributed to Berkeley by
7 * the University of Utah, and William Jolitz.
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
12 * 1. Redistributions of source code must retain the above copyright
13 * notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 * notice, this list of conditions and the following disclaimer in the
16 * documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 * must display the following acknowledgement:
19 * This product includes software developed by the University of
20 * California, Berkeley and its contributors.
21 * 4. Neither the name of the University nor the names of its contributors
22 * may be used to endorse or promote products derived from this software
23 * without specific prior written permission.
25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
38 #include <sys/cdefs.h>
39 __FBSDID("$FreeBSD$");
42 * 386 Trap and System call handling
45 #include "opt_clock.h"
48 #include "opt_ktrace.h"
50 #include <sys/param.h>
52 #include <sys/systm.h>
54 #include <sys/pioctl.h>
55 #include <sys/kernel.h>
58 #include <sys/mutex.h>
60 #include <sys/ptrace.h>
61 #include <sys/resourcevar.h>
62 #include <sys/signalvar.h>
63 #include <sys/syscall.h>
64 #include <sys/sysctl.h>
65 #include <sys/sysent.h>
67 #include <sys/vmmeter.h>
69 #include <sys/ktrace.h>
71 #include <security/audit/audit.h>
74 #include <vm/vm_param.h>
76 #include <vm/vm_kern.h>
77 #include <vm/vm_map.h>
78 #include <vm/vm_page.h>
79 #include <vm/vm_extern.h>
81 #include <machine/cpu.h>
82 #include <machine/intr_machdep.h>
83 #include <machine/md_var.h>
85 #include <compat/freebsd32/freebsd32_util.h>
87 #define IDTVEC(name) __CONCAT(X,name)
89 extern inthand_t IDTVEC(int0x80_syscall), IDTVEC(rsvd);
91 void ia32_syscall(struct trapframe *frame); /* Called from asm code */
94 ia32_set_syscall_retval(struct thread *td, int error)
97 cpu_set_syscall_retval(td, error);
101 ia32_fetch_syscall_args(struct thread *td, struct syscall_args *sa)
104 struct trapframe *frame;
110 frame = td->td_frame;
112 params = (caddr_t)frame->tf_rsp + sizeof(u_int32_t);
113 sa->code = frame->tf_rax;
116 * Need to check if this is a 32 bit or 64 bit syscall.
118 if (sa->code == SYS_syscall) {
120 * Code is first argument, followed by actual args.
122 sa->code = fuword32(params);
123 params += sizeof(int);
124 } else if (sa->code == SYS___syscall) {
126 * Like syscall, but code is a quad, so as to maintain
127 * quad alignment for the rest of the arguments.
128 * We use a 32-bit fetch in case params is not
131 sa->code = fuword32(params);
132 params += sizeof(quad_t);
134 if (p->p_sysent->sv_mask)
135 sa->code &= p->p_sysent->sv_mask;
136 if (sa->code >= p->p_sysent->sv_size)
137 sa->callp = &p->p_sysent->sv_table[0];
139 sa->callp = &p->p_sysent->sv_table[sa->code];
140 sa->narg = sa->callp->sy_narg;
142 if (params != NULL && sa->narg != 0)
143 error = copyin(params, (caddr_t)args,
144 (u_int)(sa->narg * sizeof(int)));
148 for (i = 0; i < sa->narg; i++)
149 sa->args[i] = args[i];
152 td->td_retval[0] = 0;
153 td->td_retval[1] = frame->tf_rdx;
160 ia32_syscall(struct trapframe *frame)
163 struct syscall_args sa;
164 register_t orig_tf_rflags;
168 orig_tf_rflags = frame->tf_rflags;
170 td->td_frame = frame;
172 error = syscallenter(td, &sa);
177 if (orig_tf_rflags & PSL_T) {
178 frame->tf_rflags &= ~PSL_T;
179 ksiginfo_init_trap(&ksi);
180 ksi.ksi_signo = SIGTRAP;
181 ksi.ksi_code = TRAP_TRACE;
182 ksi.ksi_addr = (void *)frame->tf_rip;
183 trapsignal(td, &ksi);
186 syscallret(td, error, &sa);
190 ia32_syscall_enable(void *dummy)
193 setidt(IDT_SYSCALL, &IDTVEC(int0x80_syscall), SDT_SYSIGT, SEL_UPL, 0);
197 ia32_syscall_disable(void *dummy)
200 setidt(IDT_SYSCALL, &IDTVEC(rsvd), SDT_SYSIGT, SEL_KPL, 0);
203 SYSINIT(ia32_syscall, SI_SUB_EXEC, SI_ORDER_ANY, ia32_syscall_enable, NULL);
204 SYSUNINIT(ia32_syscall, SI_SUB_EXEC, SI_ORDER_ANY, ia32_syscall_disable, NULL);