2 * SPDX-License-Identifier: BSD-4-Clause
4 * Copyright 1997 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.
14 * 3. All advertising materials mentioning features or use of this software
15 * must display the following acknowledgement:
16 * This product includes software developed by Sean Eric Fagan
17 * 4. Neither the name of the author may be used to endorse or promote
18 * products derived from this software without specific prior written
21 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
34 #include <sys/cdefs.h>
35 __FBSDID("$FreeBSD$");
37 /* FreeBSD/amd64-freebsd32-specific system call handling. */
39 #include <sys/ptrace.h>
40 #include <sys/syscall.h>
42 #include <machine/reg.h>
43 #include <machine/psl.h>
48 #include <sysdecode.h>
53 amd64_freebsd32_fetch_args(struct trussinfo *trussinfo, u_int narg)
55 struct ptrace_io_desc iorequest;
57 struct current_syscall *cs;
58 unsigned int args32[narg];
59 unsigned long parm_offset;
63 tid = trussinfo->curthread->tid;
64 cs = &trussinfo->curthread->cs;
65 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
66 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
69 parm_offset = regs.r_rsp + sizeof(int);
72 * FreeBSD has two special kinds of system call redirections --
73 * SYS_syscall, and SYS___syscall. The former is the old syscall()
74 * routine, basically; the latter is for quad-aligned arguments.
76 * The system call argument count and code from ptrace() already
77 * account for these, but we need to skip over the first argument.
81 parm_offset += sizeof(int);
84 parm_offset += sizeof(quad_t);
88 iorequest.piod_op = PIOD_READ_D;
89 iorequest.piod_offs = (void *)parm_offset;
90 iorequest.piod_addr = args32;
91 iorequest.piod_len = sizeof(args32);
92 ptrace(PT_IO, tid, (caddr_t)&iorequest, 0);
93 if (iorequest.piod_len == 0) {
97 for (i = 0; i < narg; i++)
98 cs->args[i] = args32[i];
103 amd64_freebsd32_fetch_retval(struct trussinfo *trussinfo, long *retval,
109 tid = trussinfo->curthread->tid;
110 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
111 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
115 retval[0] = regs.r_rax & 0xffffffff;
116 retval[1] = regs.r_rdx & 0xffffffff;
117 *errorp = !!(regs.r_rflags & PSL_C);
121 static struct procabi amd64_freebsd32 = {
123 SYSDECODE_ABI_FREEBSD32,
124 amd64_freebsd32_fetch_args,
125 amd64_freebsd32_fetch_retval,
126 STAILQ_HEAD_INITIALIZER(amd64_freebsd32.extra_syscalls),
130 PROCABI(amd64_freebsd32);
132 static struct procabi amd64_freebsd32_aout = {
134 SYSDECODE_ABI_FREEBSD32,
135 amd64_freebsd32_fetch_args,
136 amd64_freebsd32_fetch_retval,
137 STAILQ_HEAD_INITIALIZER(amd64_freebsd32.extra_syscalls),
141 PROCABI(amd64_freebsd32_aout);