2 * Copyright 2006 Peter Grehan <grehan@freebsd.org>
3 * Copyright 2005 Orlando Bassotto <orlando@break.net>
4 * Copyright 1998 Sean Eric Fagan
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
9 * 1. Redistributions of source code must retain the above copyright
10 * notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 * notice, this list of conditions and the following disclaimer in the
13 * documentation and/or other materials provided with the distribution.
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
28 #include <sys/cdefs.h>
29 __FBSDID("$FreeBSD$");
31 /* FreeBSD/powerpc-specific system call handling. */
33 #include <sys/ptrace.h>
34 #include <sys/syscall.h>
36 #include <machine/reg.h>
37 #include <machine/frame.h>
40 #include <sysdecode.h>
45 powerpc_fetch_args(struct trussinfo *trussinfo, u_int narg)
47 struct ptrace_io_desc iorequest;
49 struct current_syscall *cs;
53 tid = trussinfo->curthread->tid;
54 cs = &trussinfo->curthread->cs;
55 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
56 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
61 * FreeBSD has two special kinds of system call redirections --
62 * SYS_syscall, and SYS___syscall. The former is the old syscall()
63 * routine, basically; the latter is for quad-aligned arguments.
65 * The system call argument count and code from ptrace() already
66 * account for these, but we need to skip over the first argument.
69 switch (regs.fixreg[0]) {
78 for (i = 0; i < narg && reg < NARGREG; i++, reg++) {
79 cs->args[i] = regs.fixreg[FIRSTARG + reg];
82 iorequest.piod_op = PIOD_READ_D;
83 iorequest.piod_offs = (void *)(regs.fixreg[1] + 8);
84 iorequest.piod_addr = &cs->args[i];
85 iorequest.piod_len = (narg - i) * sizeof(cs->args[0]);
86 ptrace(PT_IO, tid, (caddr_t)&iorequest, 0);
87 if (iorequest.piod_len == 0)
95 powerpc_fetch_retval(struct trussinfo *trussinfo, long *retval, int *errorp)
100 tid = trussinfo->curthread->tid;
101 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
102 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
106 /* XXX: Does not have fixup for __syscall(). */
107 retval[0] = regs.fixreg[3];
108 retval[1] = regs.fixreg[4];
109 *errorp = !!(regs.cr & 0x10000000);
113 static struct procabi powerpc_freebsd = {
115 SYSDECODE_ABI_FREEBSD,
120 PROCABI(powerpc_freebsd);