1/*
2 * Copyright 1997 Sean Eric Fagan
3 *
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
6 * are met:
7 * 1. Redistributions of source code must retain the above copyright
8 *    notice, this list of conditions and the following disclaimer.
9 * 2. Redistributions in binary form must reproduce the above copyright
10 *    notice, this list of conditions and the following disclaimer in the
11 *    documentation and/or other materials provided with the distribution.
12 * 3. All advertising materials mentioning features or use of this software
13 *    must display the following acknowledgement:
14 *	This product includes software developed by Sean Eric Fagan
15 * 4. Neither the name of the author may be used to endorse or promote
16 *    products derived from this software without specific prior written
17 *    permission.
18 *
19 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
20 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
21 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
22 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
23 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
24 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
25 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
26 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
27 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
28 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
29 * SUCH DAMAGE.
30 */
31
32#include <sys/cdefs.h>
33__FBSDID("$FreeBSD$");
34
35/* FreeBSD/ia64-specific system call handling. */
36
37#include <sys/ptrace.h>
38#include <sys/syscall.h>
39
40#include <machine/reg.h>
41
42#include <stdio.h>
43
44#include "truss.h"
45
46#include "syscalls.h"
47
48static int
49ia64_fetch_args(struct trussinfo *trussinfo, u_int narg)
50{
51	struct reg regs;
52	struct current_syscall *cs;
53	unsigned long *parm_offset;
54	lwpid_t tid;
55	int i;
56
57	tid = trussinfo->curthread->tid;
58	cs = &trussinfo->curthread->cs;
59	if (ptrace(PT_GETREGS, tid, (caddr_t)&regs, 0) < 0) {
60		fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
61		return;
62	}
63	parm_offset = &regs.r_scratch.gr16;
64
65	/*
66	 * FreeBSD has two special kinds of system call redirections --
67	 * SYS_syscall, and SYS___syscall.  The former is the old syscall()
68	 * routine, basically; the latter is for quad-aligned arguments.
69	 *
70	 * The system call argument count and code from ptrace() already
71	 * account for these, but we need to skip over %rax if it contains
72	 * either of these values.
73	 */
74	switch (regs.r_scratch.gr15) {
75	case SYS_syscall:
76	case SYS___syscall:
77		parm_offset++;
78		break;
79	}
80
81	memcpy(cs->args, parm_offset, narg * sizeof(long));
82
83	return (0);
84}
85
86static int
87ia64_fetch_retval(struct trussinfo *trussinfo, long *retval, int *errorp)
88{
89	struct reg regs;
90	lwpid_t tid;
91
92	tid = trussinfo->curthread->tid;
93	if (ptrace(PT_GETREGS, tid, (caddr_t)&regs, 0) < 0) {
94		fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
95		return (-1);
96	}
97
98	retval[0] = regs.r_scratch.gr8;
99	retval[1] = regs.r_scratch.gr9;
100	*errorp = (regs.r_scratch.gr10 != 0) ? 1 : 0;
101	return (0);
102}
103
104static struct procabi ia64_fbsd = {
105	"FreeBSD ELF64",
106	syscallnames,
107	nitems(syscallnames),
108	ia64_fetch_args,
109	ia64_fetch_retval
110};
111
112PROCABI(ia64_fbsd);
113