2010-07-12 00:54:41 +00:00
|
|
|
/*
|
|
|
|
* Copyright 2006 Peter Grehan <grehan@freebsd.org>
|
|
|
|
* Copyright 2005 Orlando Bassotto <orlando@break.net>
|
|
|
|
* Copyright 1998 Sean Eric Fagan
|
|
|
|
*
|
|
|
|
* Redistribution and use in source and binary forms, with or without
|
|
|
|
* modification, are permitted provided that the following conditions
|
|
|
|
* are met:
|
|
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
|
|
* notice, this list of conditions and the following disclaimer.
|
|
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
|
|
* documentation and/or other materials provided with the distribution.
|
|
|
|
*
|
|
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
|
|
* SUCH DAMAGE.
|
|
|
|
*/
|
|
|
|
|
2015-09-30 19:13:32 +00:00
|
|
|
#include <sys/cdefs.h>
|
|
|
|
__FBSDID("$FreeBSD$");
|
2010-07-12 00:54:41 +00:00
|
|
|
|
2015-10-13 18:23:51 +00:00
|
|
|
/* FreeBSD/powerpc-specific system call handling. */
|
2010-07-12 00:54:41 +00:00
|
|
|
|
|
|
|
#include <sys/ptrace.h>
|
|
|
|
#include <sys/syscall.h>
|
|
|
|
|
|
|
|
#include <machine/reg.h>
|
|
|
|
#include <machine/frame.h>
|
|
|
|
|
|
|
|
#include <stdio.h>
|
2016-01-26 19:07:09 +00:00
|
|
|
#include <sysdecode.h>
|
2010-07-12 00:54:41 +00:00
|
|
|
|
|
|
|
#include "truss.h"
|
|
|
|
|
2015-09-30 19:13:32 +00:00
|
|
|
static int
|
2015-10-13 18:23:51 +00:00
|
|
|
powerpc_fetch_args(struct trussinfo *trussinfo, u_int narg)
|
2012-09-02 11:03:18 +00:00
|
|
|
{
|
|
|
|
struct ptrace_io_desc iorequest;
|
|
|
|
struct reg regs;
|
2015-09-30 19:13:32 +00:00
|
|
|
struct current_syscall *cs;
|
2012-09-16 14:38:01 +00:00
|
|
|
lwpid_t tid;
|
2015-09-30 19:13:32 +00:00
|
|
|
u_int i, reg;
|
2012-09-02 11:03:18 +00:00
|
|
|
|
2012-09-16 14:38:01 +00:00
|
|
|
tid = trussinfo->curthread->tid;
|
2015-09-30 19:13:32 +00:00
|
|
|
cs = &trussinfo->curthread->cs;
|
2012-09-16 14:38:01 +00:00
|
|
|
if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
|
2012-09-02 11:03:18 +00:00
|
|
|
fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
|
2015-09-30 19:13:32 +00:00
|
|
|
return (-1);
|
2012-09-02 11:03:18 +00:00
|
|
|
}
|
|
|
|
|
|
|
|
/*
|
2015-09-30 19:13:32 +00:00
|
|
|
* FreeBSD has two special kinds of system call redirections --
|
2012-09-02 11:03:18 +00:00
|
|
|
* SYS_syscall, and SYS___syscall. The former is the old syscall()
|
|
|
|
* routine, basically; the latter is for quad-aligned arguments.
|
2015-09-30 19:13:32 +00:00
|
|
|
*
|
|
|
|
* The system call argument count and code from ptrace() already
|
|
|
|
* account for these, but we need to skip over the first argument.
|
2012-09-02 11:03:18 +00:00
|
|
|
*/
|
2015-09-30 19:13:32 +00:00
|
|
|
reg = 0;
|
|
|
|
switch (regs.fixreg[0]) {
|
|
|
|
case SYS_syscall:
|
|
|
|
reg += 1;
|
|
|
|
break;
|
2015-10-13 18:23:51 +00:00
|
|
|
case SYS___syscall:
|
|
|
|
reg += 2;
|
|
|
|
break;
|
2012-09-02 11:03:18 +00:00
|
|
|
}
|
|
|
|
|
2015-10-13 18:23:51 +00:00
|
|
|
for (i = 0; i < narg && reg < NARGREG; i++, reg++) {
|
2015-09-30 19:13:32 +00:00
|
|
|
cs->args[i] = regs.fixreg[FIRSTARG + reg];
|
2015-10-13 18:23:51 +00:00
|
|
|
}
|
2015-09-30 19:13:32 +00:00
|
|
|
if (narg > i) {
|
2012-09-02 11:03:18 +00:00
|
|
|
iorequest.piod_op = PIOD_READ_D;
|
2015-10-13 18:23:51 +00:00
|
|
|
iorequest.piod_offs = (void *)(regs.fixreg[1] + 8);
|
2015-09-30 19:13:32 +00:00
|
|
|
iorequest.piod_addr = &cs->args[i];
|
|
|
|
iorequest.piod_len = (narg - i) * sizeof(cs->args[0]);
|
2012-09-16 14:38:01 +00:00
|
|
|
ptrace(PT_IO, tid, (caddr_t)&iorequest, 0);
|
2012-09-02 11:03:18 +00:00
|
|
|
if (iorequest.piod_len == 0)
|
2015-09-30 19:13:32 +00:00
|
|
|
return (-1);
|
2012-09-02 11:03:18 +00:00
|
|
|
}
|
2010-07-12 00:54:41 +00:00
|
|
|
|
2015-09-30 19:13:32 +00:00
|
|
|
return (0);
|
2010-07-12 00:54:41 +00:00
|
|
|
}
|
|
|
|
|
2015-09-30 19:13:32 +00:00
|
|
|
static int
|
2015-10-13 18:23:51 +00:00
|
|
|
powerpc_fetch_retval(struct trussinfo *trussinfo, long *retval, int *errorp)
|
2010-07-12 00:54:41 +00:00
|
|
|
{
|
2012-09-02 11:03:18 +00:00
|
|
|
struct reg regs;
|
2012-09-16 14:38:01 +00:00
|
|
|
lwpid_t tid;
|
2012-09-02 11:03:18 +00:00
|
|
|
|
2012-09-16 14:38:01 +00:00
|
|
|
tid = trussinfo->curthread->tid;
|
|
|
|
if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
|
2015-09-30 19:13:32 +00:00
|
|
|
fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
|
2012-09-02 11:03:18 +00:00
|
|
|
return (-1);
|
|
|
|
}
|
|
|
|
|
2015-10-13 18:23:51 +00:00
|
|
|
/* XXX: Does not have fixup for __syscall(). */
|
2015-09-30 19:13:32 +00:00
|
|
|
retval[0] = regs.fixreg[3];
|
|
|
|
retval[1] = regs.fixreg[4];
|
|
|
|
*errorp = !!(regs.cr & 0x10000000);
|
|
|
|
return (0);
|
|
|
|
}
|
2012-09-02 11:03:18 +00:00
|
|
|
|
2015-10-13 18:23:51 +00:00
|
|
|
static struct procabi powerpc_freebsd = {
|
|
|
|
"FreeBSD ELF32",
|
2016-01-26 19:07:09 +00:00
|
|
|
FREEBSD,
|
2015-10-13 18:23:51 +00:00
|
|
|
powerpc_fetch_args,
|
|
|
|
powerpc_fetch_retval
|
2015-09-30 19:13:32 +00:00
|
|
|
};
|
2012-09-02 11:03:18 +00:00
|
|
|
|
2015-10-13 18:23:51 +00:00
|
|
|
PROCABI(powerpc_freebsd);
|