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/i386-specific system call handling. */
37 #include <sys/ptrace.h>
38 #include <sys/syscall.h>
40 #include <machine/reg.h>
41 #include <machine/psl.h>
44 #include <sysdecode.h>
49 i386_fetch_args(struct trussinfo *trussinfo, u_int narg)
51 struct ptrace_io_desc iorequest;
53 struct current_syscall *cs;
55 unsigned int parm_offset;
57 tid = trussinfo->curthread->tid;
58 cs = &trussinfo->curthread->cs;
59 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
60 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
63 parm_offset = regs.r_esp + sizeof(int);
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.
75 parm_offset += sizeof(int);
78 parm_offset += sizeof(quad_t);
82 iorequest.piod_op = PIOD_READ_D;
83 iorequest.piod_offs = (void *)parm_offset;
84 iorequest.piod_addr = cs->args;
85 iorequest.piod_len = narg * sizeof(unsigned long);
86 ptrace(PT_IO, tid, (caddr_t)&iorequest, 0);
87 if (iorequest.piod_len == 0)
94 i386_fetch_retval(struct trussinfo *trussinfo, long *retval, int *errorp)
99 tid = trussinfo->curthread->tid;
100 if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
101 fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
105 retval[0] = regs.r_eax;
106 retval[1] = regs.r_edx;
107 *errorp = !!(regs.r_eflags & PSL_C);
111 static struct procabi i386_freebsd = {
113 SYSDECODE_ABI_FREEBSD,
118 PROCABI(i386_freebsd);
120 static struct procabi i386_freebsd_aout = {
122 SYSDECODE_ABI_FREEBSD,
127 PROCABI(i386_freebsd_aout);