2 * Copyright 1997 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/amd64-freebsd32-specific system call handling. */
37 #include <sys/ptrace.h>
38 #include <sys/syscall.h>
40 #include <machine/reg.h>
41 #include <machine/psl.h>
46 #include <sysdecode.h>
51 amd64_freebsd32_fetch_args(struct trussinfo *trussinfo, u_int narg)
53 struct ptrace_io_desc iorequest;
55 struct current_syscall *cs;
56 unsigned int args32[narg];
57 unsigned long parm_offset;
61 tid = trussinfo->curthread->tid;
62 cs = &trussinfo->curthread->cs;
63 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
64 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
67 parm_offset = regs.r_rsp + sizeof(int);
70 * FreeBSD has two special kinds of system call redirections --
71 * SYS_syscall, and SYS___syscall. The former is the old syscall()
72 * routine, basically; the latter is for quad-aligned arguments.
74 * The system call argument count and code from ptrace() already
75 * account for these, but we need to skip over the first argument.
79 parm_offset += sizeof(int);
82 parm_offset += sizeof(quad_t);
86 iorequest.piod_op = PIOD_READ_D;
87 iorequest.piod_offs = (void *)parm_offset;
88 iorequest.piod_addr = args32;
89 iorequest.piod_len = sizeof(args32);
90 ptrace(PT_IO, tid, (caddr_t)&iorequest, 0);
91 if (iorequest.piod_len == 0) {
95 for (i = 0; i < narg; i++)
96 cs->args[i] = args32[i];
101 amd64_freebsd32_fetch_retval(struct trussinfo *trussinfo, long *retval,
107 tid = trussinfo->curthread->tid;
108 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
109 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
113 retval[0] = regs.r_rax & 0xffffffff;
114 retval[1] = regs.r_rdx & 0xffffffff;
115 *errorp = !!(regs.r_rflags & PSL_C);
119 static struct procabi amd64_freebsd32 = {
121 SYSDECODE_ABI_FREEBSD32,
122 amd64_freebsd32_fetch_args,
123 amd64_freebsd32_fetch_retval,
124 STAILQ_HEAD_INITIALIZER(amd64_freebsd32.extra_syscalls),
128 PROCABI(amd64_freebsd32);
130 static struct procabi amd64_freebsd32_aout = {
132 SYSDECODE_ABI_FREEBSD32,
133 amd64_freebsd32_fetch_args,
134 amd64_freebsd32_fetch_retval,
135 STAILQ_HEAD_INITIALIZER(amd64_freebsd32.extra_syscalls),
139 PROCABI(amd64_freebsd32_aout);