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>
41 #include <sysdecode.h>
46 powerpc_fetch_args(struct trussinfo *trussinfo, u_int narg)
48 struct ptrace_io_desc iorequest;
50 struct current_syscall *cs;
54 tid = trussinfo->curthread->tid;
55 cs = &trussinfo->curthread->cs;
56 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
57 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
62 * FreeBSD has two special kinds of system call redirections --
63 * SYS_syscall, and SYS___syscall. The former is the old syscall()
64 * routine, basically; the latter is for quad-aligned arguments.
66 * The system call argument count and code from ptrace() already
67 * account for these, but we need to skip over the first argument.
70 switch (regs.fixreg[0]) {
79 for (i = 0; i < narg && reg < NARGREG; i++, reg++) {
80 cs->args[i] = regs.fixreg[FIRSTARG + reg];
83 iorequest.piod_op = PIOD_READ_D;
84 iorequest.piod_offs = (void *)(regs.fixreg[1] + 8);
85 iorequest.piod_addr = &cs->args[i];
86 iorequest.piod_len = (narg - i) * sizeof(cs->args[0]);
87 ptrace(PT_IO, tid, (caddr_t)&iorequest, 0);
88 if (iorequest.piod_len == 0)
96 powerpc_fetch_retval(struct trussinfo *trussinfo, long *retval, int *errorp)
101 tid = trussinfo->curthread->tid;
102 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
103 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
107 /* XXX: Does not have fixup for __syscall(). */
108 retval[0] = regs.fixreg[3];
109 retval[1] = regs.fixreg[4];
110 *errorp = !!(regs.cr & 0x10000000);
114 static struct procabi powerpc_freebsd = {
116 SYSDECODE_ABI_FREEBSD,
118 powerpc_fetch_retval,
119 STAILQ_HEAD_INITIALIZER(powerpc_freebsd.extra_syscalls),
123 PROCABI(powerpc_freebsd);