5842bd683f
Suggested by: jmallett Reviewed by: bdrewery, jmallett Differential Revision: https://reviews.freebsd.org/D5123
135 lines
4.0 KiB
C
135 lines
4.0 KiB
C
/*
|
|
* Copyright 1997 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.
|
|
* 3. All advertising materials mentioning features or use of this software
|
|
* must display the following acknowledgement:
|
|
* This product includes software developed by Sean Eric Fagan
|
|
* 4. Neither the name of the author may be used to endorse or promote
|
|
* products derived from this software without specific prior written
|
|
* permission.
|
|
*
|
|
* 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.
|
|
*/
|
|
|
|
#include <sys/cdefs.h>
|
|
__FBSDID("$FreeBSD$");
|
|
|
|
/* FreeBSD/amd64-freebsd32-specific system call handling. */
|
|
|
|
#include <sys/ptrace.h>
|
|
#include <sys/syscall.h>
|
|
|
|
#include <machine/reg.h>
|
|
#include <machine/psl.h>
|
|
|
|
#include <stdio.h>
|
|
#include <stdlib.h>
|
|
#include <sysdecode.h>
|
|
|
|
#include "truss.h"
|
|
|
|
static int
|
|
amd64_freebsd32_fetch_args(struct trussinfo *trussinfo, u_int narg)
|
|
{
|
|
struct ptrace_io_desc iorequest;
|
|
struct reg regs;
|
|
struct current_syscall *cs;
|
|
unsigned int args32[narg];
|
|
unsigned long parm_offset;
|
|
lwpid_t tid;
|
|
u_int i;
|
|
|
|
tid = trussinfo->curthread->tid;
|
|
cs = &trussinfo->curthread->cs;
|
|
if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
|
|
fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
|
|
return (-1);
|
|
}
|
|
parm_offset = regs.r_rsp + sizeof(int);
|
|
|
|
/*
|
|
* FreeBSD has two special kinds of system call redirections --
|
|
* SYS_syscall, and SYS___syscall. The former is the old syscall()
|
|
* routine, basically; the latter is for quad-aligned arguments.
|
|
*
|
|
* The system call argument count and code from ptrace() already
|
|
* account for these, but we need to skip over the first argument.
|
|
*/
|
|
switch (regs.r_rax) {
|
|
case SYS_syscall:
|
|
parm_offset += sizeof(int);
|
|
break;
|
|
case SYS___syscall:
|
|
parm_offset += sizeof(quad_t);
|
|
break;
|
|
}
|
|
|
|
iorequest.piod_op = PIOD_READ_D;
|
|
iorequest.piod_offs = (void *)parm_offset;
|
|
iorequest.piod_addr = args32;
|
|
iorequest.piod_len = sizeof(args32);
|
|
ptrace(PT_IO, tid, (caddr_t)&iorequest, 0);
|
|
if (iorequest.piod_len == 0) {
|
|
return (-1);
|
|
}
|
|
|
|
for (i = 0; i < narg; i++)
|
|
cs->args[i] = args32[i];
|
|
return (0);
|
|
}
|
|
|
|
static int
|
|
amd64_freebsd32_fetch_retval(struct trussinfo *trussinfo, long *retval,
|
|
int *errorp)
|
|
{
|
|
struct reg regs;
|
|
lwpid_t tid;
|
|
|
|
tid = trussinfo->curthread->tid;
|
|
if (ptrace(PT_GETREGS, tid, (caddr_t)®s, 0) < 0) {
|
|
fprintf(trussinfo->outfile, "-- CANNOT READ REGISTERS --\n");
|
|
return (-1);
|
|
}
|
|
|
|
retval[0] = regs.r_rax & 0xffffffff;
|
|
retval[1] = regs.r_rdx & 0xffffffff;
|
|
*errorp = !!(regs.r_rflags & PSL_C);
|
|
return (0);
|
|
}
|
|
|
|
static struct procabi amd64_freebsd32 = {
|
|
"FreeBSD ELF32",
|
|
SYSDECODE_ABI_FREEBSD32,
|
|
amd64_freebsd32_fetch_args,
|
|
amd64_freebsd32_fetch_retval
|
|
};
|
|
|
|
PROCABI(amd64_freebsd32);
|
|
|
|
static struct procabi amd64_freebsd32_aout = {
|
|
"FreeBSD a.out",
|
|
SYSDECODE_ABI_FREEBSD32,
|
|
amd64_freebsd32_fetch_args,
|
|
amd64_freebsd32_fetch_retval
|
|
};
|
|
|
|
PROCABI(amd64_freebsd32_aout);
|