2 * Copyright 1998 Sean Eric Fagan
4 * Redistribution and use in source and binary forms, with or without
5 * modification, are permitted provided that the following conditions
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
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
32 #include <sys/cdefs.h>
33 __FBSDID("$FreeBSD$");
35 /* FreeBSD/mips-specific system call handling. */
37 #include <sys/ptrace.h>
38 #include <sys/syscall.h>
40 #include <machine/frame.h>
41 #include <machine/reg.h>
45 #include <sysdecode.h>
50 mips_fetch_args(struct trussinfo *trussinfo, u_int narg)
52 struct ptrace_io_desc iorequest;
54 struct current_syscall *cs;
58 tid = trussinfo->curthread->tid;
59 cs = &trussinfo->curthread->cs;
60 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
61 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
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.
70 * The system call argument count and code from ptrace() already
71 * account for these, but we need to skip over the first argument.
74 switch (regs.r_regs[V0]) {
79 #if defined(__mips_n32) || defined(__mips_n64)
87 #if defined(__mips_n32) || defined(__mips_n64)
93 for (i = 0; i < narg && reg <= MAXREG; i++, reg++)
94 cs->args[i] = regs.r_regs[reg];
96 iorequest.piod_op = PIOD_READ_D;
97 iorequest.piod_offs = (void *)((uintptr_t)regs.r_regs[SP] +
98 4 * sizeof(cs->args[0]));
99 iorequest.piod_addr = &cs->args[i];
100 iorequest.piod_len = (narg - i) * sizeof(cs->args[0]);
101 ptrace(PT_IO, tid, (caddr_t)&iorequest, 0);
102 if (iorequest.piod_len == 0)
110 mips_fetch_retval(struct trussinfo *trussinfo, long *retval, int *errorp)
115 tid = trussinfo->curthread->tid;
116 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
117 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
121 /* XXX: Does not have special handling for __syscall(). */
122 retval[0] = regs.r_regs[V0];
123 retval[1] = regs.r_regs[V1];
124 *errorp = !!regs.r_regs[A3];
129 static struct procabi mips_freebsd = {
135 SYSDECODE_ABI_FREEBSD,
138 STAILQ_HEAD_INITIALIZER(mips_freebsd.extra_syscalls),
142 PROCABI(mips_freebsd);