* Copyright (c) 1993 Branko Lankester <branko@hacktic.nl>
* Copyright (c) 1993, 1994, 1995, 1996 Rick Sladkey <jrs@world.std.com>
* Copyright (c) 1996-2001 Wichert Akkerman <wichert@cistron.nl>
+ * Copyright (c) 1999-2017 The strace developers.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
*/
#include "defs.h"
-#include <asm/ioctl.h>
+#include <linux/ioctl.h>
#include "xlat/ioctl_dirs.h"
#ifdef HAVE_LINUX_INPUT_H
static int
compare(const void *a, const void *b)
{
- const unsigned int code1 = (const unsigned long) a;
+ const unsigned int code1 = (const uintptr_t) a;
const unsigned int code2 = ((struct_ioctlent *) b)->code;
return (code1 > code2) ? 1 : (code1 < code2) ? -1 : 0;
}
-const struct_ioctlent *
+static const struct_ioctlent *
ioctl_lookup(const unsigned int code)
{
struct_ioctlent *iop;
- iop = bsearch((const void *) (const unsigned long) code, ioctlent,
+ iop = bsearch((const void *) (const uintptr_t) code, ioctlent,
nioctlents, sizeof(ioctlent[0]), compare);
while (iop > ioctlent) {
iop--;
return iop;
}
-const struct_ioctlent *
+static const struct_ioctlent *
ioctl_next_match(const struct_ioctlent *iop)
{
const unsigned int code = iop->code;
return NULL;
}
-void
+static void
ioctl_print_code(const unsigned int code)
{
tprints("_IOC(");
printflags(ioctl_dirs, _IOC_DIR(code), "_IOC_???");
- tprintf(", 0x%02x, 0x%02x, 0x%02x)",
+ tprintf(", %#x, %#x, %#x)",
_IOC_TYPE(code), _IOC_NR(code), _IOC_SIZE(code));
}
static int
-evdev_decode_number(unsigned int arg)
+evdev_decode_number(const unsigned int code)
{
- unsigned int nr = _IOC_NR(arg);
+ const unsigned int nr = _IOC_NR(code);
- if (_IOC_DIR(arg) == _IOC_WRITE) {
+ if (_IOC_DIR(code) == _IOC_WRITE) {
if (nr >= 0xc0 && nr <= 0xc0 + 0x3f) {
tprints("EVIOCSABS(");
- printxval(evdev_abs, nr - 0xc0, "EV_???");
+ printxval(evdev_abs, nr - 0xc0, "ABS_???");
tprints(")");
return 1;
}
}
- if (_IOC_DIR(arg) != _IOC_READ)
+ if (_IOC_DIR(code) != _IOC_READ)
return 0;
if (nr >= 0x20 && nr <= 0x20 + 0x1f) {
tprints("EVIOCGBIT(");
printxval(evdev_ev, nr - 0x20, "EV_???");
- tprintf(", %u)", _IOC_SIZE(arg));
+ tprintf(", %u)", _IOC_SIZE(code));
return 1;
} else if (nr >= 0x40 && nr <= 0x40 + 0x3f) {
tprints("EVIOCGABS(");
switch (_IOC_NR(nr)) {
case 0x06:
- tprintf("EVIOCGNAME(%u)", _IOC_SIZE(arg));
+ tprintf("EVIOCGNAME(%u)", _IOC_SIZE(code));
return 1;
case 0x07:
- tprintf("EVIOCGPHYS(%u)", _IOC_SIZE(arg));
+ tprintf("EVIOCGPHYS(%u)", _IOC_SIZE(code));
return 1;
case 0x08:
- tprintf("EVIOCGUNIQ(%u)", _IOC_SIZE(arg));
+ tprintf("EVIOCGUNIQ(%u)", _IOC_SIZE(code));
return 1;
case 0x09:
- tprintf("EVIOCGPROP(%u)", _IOC_SIZE(arg));
+ tprintf("EVIOCGPROP(%u)", _IOC_SIZE(code));
return 1;
case 0x0a:
- tprintf("EVIOCGMTSLOTS(%u)", _IOC_SIZE(arg));
+ tprintf("EVIOCGMTSLOTS(%u)", _IOC_SIZE(code));
return 1;
case 0x18:
- tprintf("EVIOCGKEY(%u)", _IOC_SIZE(arg));
+ tprintf("EVIOCGKEY(%u)", _IOC_SIZE(code));
return 1;
case 0x19:
- tprintf("EVIOCGLED(%u)", _IOC_SIZE(arg));
+ tprintf("EVIOCGLED(%u)", _IOC_SIZE(code));
return 1;
case 0x1a:
- tprintf("EVIOCGSND(%u)", _IOC_SIZE(arg));
+ tprintf("EVIOCGSND(%u)", _IOC_SIZE(code));
return 1;
case 0x1b:
- tprintf("EVIOCGSW(%u)", _IOC_SIZE(arg));
+ tprintf("EVIOCGSW(%u)", _IOC_SIZE(code));
return 1;
default:
return 0;
}
static int
-hiddev_decode_number(unsigned int arg)
+hiddev_decode_number(const unsigned int code)
{
- if (_IOC_DIR(arg) == _IOC_READ) {
- switch (_IOC_NR(arg)) {
+ if (_IOC_DIR(code) == _IOC_READ) {
+ switch (_IOC_NR(code)) {
case 0x04:
- tprintf("HIDIOCGRAWNAME(%u)", _IOC_SIZE(arg));
+ tprintf("HIDIOCGRAWNAME(%u)", _IOC_SIZE(code));
return 1;
case 0x05:
- tprintf("HIDIOCGRAWPHYS(%u)", _IOC_SIZE(arg));
+ tprintf("HIDIOCGRAWPHYS(%u)", _IOC_SIZE(code));
return 1;
case 0x06:
- tprintf("HIDIOCSFEATURE(%u)", _IOC_SIZE(arg));
+ tprintf("HIDIOCSFEATURE(%u)", _IOC_SIZE(code));
return 1;
case 0x12:
- tprintf("HIDIOCGPHYS(%u)", _IOC_SIZE(arg));
+ tprintf("HIDIOCGPHYS(%u)", _IOC_SIZE(code));
return 1;
default:
return 0;
}
- } else if (_IOC_DIR(arg) == (_IOC_READ | _IOC_WRITE)) {
- switch (_IOC_NR(arg)) {
+ } else if (_IOC_DIR(code) == (_IOC_READ | _IOC_WRITE)) {
+ switch (_IOC_NR(code)) {
case 0x06:
- tprintf("HIDIOCSFEATURE(%u)", _IOC_SIZE(arg));
+ tprintf("HIDIOCSFEATURE(%u)", _IOC_SIZE(code));
return 1;
case 0x07:
- tprintf("HIDIOCGFEATURE(%u)", _IOC_SIZE(arg));
+ tprintf("HIDIOCGFEATURE(%u)", _IOC_SIZE(code));
return 1;
default:
return 0;
return 0;
}
-int
-ioctl_decode_command_number(unsigned int arg)
+static int
+ioctl_decode_command_number(struct tcb *tcp)
{
- switch (_IOC_TYPE(arg)) {
+ const unsigned int code = tcp->u_arg[1];
+
+ switch (_IOC_TYPE(code)) {
case 'E':
- return evdev_decode_number(arg);
+ return evdev_decode_number(code);
case 'H':
- return hiddev_decode_number(arg);
+ return hiddev_decode_number(code);
case 'M':
- if (_IOC_DIR(arg) == _IOC_WRITE) {
- tprintf("MIXER_WRITE(%u)", _IOC_NR(arg));
+ if (_IOC_DIR(code) == _IOC_WRITE) {
+ tprintf("MIXER_WRITE(%u)", _IOC_NR(code));
return 1;
- } else if (_IOC_DIR(arg) == _IOC_READ) {
- tprintf("MIXER_READ(%u)", _IOC_NR(arg));
+ } else if (_IOC_DIR(code) == _IOC_READ) {
+ tprintf("MIXER_READ(%u)", _IOC_NR(code));
return 1;
}
return 0;
case 'U':
- if (_IOC_DIR(arg) == _IOC_READ && _IOC_NR(arg) == 0x2c) {
- tprintf("UI_GET_SYSNAME(%u)", _IOC_SIZE(arg));
+ if (_IOC_DIR(code) == _IOC_READ && _IOC_NR(code) == 0x2c) {
+ tprintf("UI_GET_SYSNAME(%u)", _IOC_SIZE(code));
return 1;
}
return 0;
case 'j':
- if (_IOC_DIR(arg) == _IOC_READ && _IOC_NR(arg) == 0x13) {
- tprintf("JSIOCGNAME(%u)", _IOC_SIZE(arg));
+ if (_IOC_DIR(code) == _IOC_READ && _IOC_NR(code) == 0x13) {
+ tprintf("JSIOCGNAME(%u)", _IOC_SIZE(code));
return 1;
}
return 0;
case 'k':
- if (_IOC_DIR(arg) == _IOC_WRITE && _IOC_NR(arg) == 0) {
- tprintf("SPI_IOC_MESSAGE(%u)", _IOC_SIZE(arg));
+ if (_IOC_DIR(code) == _IOC_WRITE && _IOC_NR(code) == 0) {
+ tprintf("SPI_IOC_MESSAGE(%u)", _IOC_SIZE(code));
return 1;
}
return 0;
}
}
-int
-ioctl_decode(struct tcb *tcp, unsigned int code, long arg)
+/**
+ * Decode arg parameter of the ioctl call.
+ *
+ * @return There are two flags of the return value important for the purposes of
+ * processing by SYS_FUNC(ioctl):
+ * - RVAL_IOCTL_DECODED: indicates that ioctl decoder code
+ * has printed arg parameter;
+ * - RVAL_DECODED: indicates that decoding is done.
+ * As a result, the following behaviour is expected:
+ * - on entering:
+ * - 0: decoding should be continued on exiting;
+ * - RVAL_IOCTL_DECODED: decoding on exiting is not needed
+ * and decoder has printed arg value;
+ * - RVAL_DECODED: decoding on exiting is not needed
+ * and generic handler should print arg value.
+ * - on exiting:
+ * - 0: generic handler should print arg value;
+ * - RVAL_IOCTL_DECODED: decoder has printed arg value.
+ *
+ * Note that it makes no sense to return just RVAL_DECODED on exiting,
+ * but, of course, it is not prohibited (for example, it may be useful
+ * in cases where the return path is common on entering and on exiting
+ * the syscall).
+ *
+ * SYS_FUNC(ioctl) converts RVAL_IOCTL_DECODED flag to RVAL_DECODED,
+ * and passes all other bits of ioctl_decode return value unchanged.
+ */
+static int
+ioctl_decode(struct tcb *tcp)
{
+ const unsigned int code = tcp->u_arg[1];
+ const kernel_ulong_t arg = tcp->u_arg[2];
+
switch (_IOC_TYPE(code)) {
#if defined(ALPHA) || defined(POWERPC)
- case 'f': case 't': case 'T':
+ case 'f': {
+ int ret = file_ioctl(tcp, code, arg);
+ if (ret != RVAL_DECODED)
+ return ret;
+ }
+ case 't':
+ case 'T':
+ return term_ioctl(tcp, code, arg);
#else /* !ALPHA */
+ case 'f':
+ return file_ioctl(tcp, code, arg);
case 0x54:
#endif /* !ALPHA */
return term_ioctl(tcp, code, arg);
case 'p':
return rtc_ioctl(tcp, code, arg);
case 0x03:
+ return hdio_ioctl(tcp, code, arg);
case 0x12:
- case 'X':
return block_ioctl(tcp, code, arg);
-#ifdef HAVE_SCSI_SG_H
+ case 'X':
+ return fs_x_ioctl(tcp, code, arg);
case 0x22:
return scsi_ioctl(tcp, code, arg);
-#endif
case 'L':
return loop_ioctl(tcp, code, arg);
case 'M':
return v4l2_ioctl(tcp, code, arg);
case '=':
return ptp_ioctl(tcp, code, arg);
+#ifdef HAVE_LINUX_INPUT_H
+ case 'E':
+ return evdev_ioctl(tcp, code, arg);
+#endif
+#ifdef HAVE_LINUX_USERFAULTFD_H
+ case 0xaa:
+ return uffdio_ioctl(tcp, code, arg);
+#endif
+#ifdef HAVE_LINUX_BTRFS_H
+ case 0x94:
+ return btrfs_ioctl(tcp, code, arg);
+#endif
+ case 0xb7:
+ return nsfs_ioctl(tcp, code, arg);
+#ifdef HAVE_LINUX_DM_IOCTL_H
+ case 0xfd:
+ return dm_ioctl(tcp, code, arg);
+#endif
default:
break;
}
return 0;
}
-/*
- * Registry of ioctl characters, culled from
- * @(#)ioccom.h 1.7 89/06/16 SMI; from UCB ioctl.h 7.1 6/4/86
- *
- * char file where defined notes
- * ---- ------------------ -----
- * F sun/fbio.h
- * G sun/gpio.h
- * H vaxif/if_hy.h
- * M sundev/mcpcmd.h *overlap*
- * M sys/modem.h *overlap*
- * S sys/stropts.h
- * T sys/termio.h -no overlap-
- * T sys/termios.h -no overlap-
- * V sundev/mdreg.h
- * a vaxuba/adreg.h
- * d sun/dkio.h -no overlap with sys/des.h-
- * d sys/des.h (possible overlap)
- * d vax/dkio.h (possible overlap)
- * d vaxuba/rxreg.h (possible overlap)
- * f sys/filio.h
- * g sunwindow/win_ioctl.h -no overlap-
- * g sunwindowdev/winioctl.c !no manifest constant! -no overlap-
- * h sundev/hrc_common.h
- * i sys/sockio.h *overlap*
- * i vaxuba/ikreg.h *overlap*
- * k sundev/kbio.h
- * m sundev/msio.h (possible overlap)
- * m sundev/msreg.h (possible overlap)
- * m sys/mtio.h (possible overlap)
- * n sun/ndio.h
- * p net/nit_buf.h (possible overlap)
- * p net/nit_if.h (possible overlap)
- * p net/nit_pf.h (possible overlap)
- * p sundev/fpareg.h (possible overlap)
- * p sys/sockio.h (possible overlap)
- * p vaxuba/psreg.h (possible overlap)
- * q sun/sqz.h
- * r sys/sockio.h
- * s sys/sockio.h
- * t sys/ttold.h (possible overlap)
- * t sys/ttycom.h (possible overlap)
- * v sundev/vuid_event.h *overlap*
- * v sys/vcmd.h *overlap*
- * V linux/videodev2.h
- *
- * End of Registry
- */
+SYS_FUNC(ioctl)
+{
+ const struct_ioctlent *iop;
+ int ret;
+
+ if (entering(tcp)) {
+ printfd(tcp, tcp->u_arg[0]);
+ tprints(", ");
+ ret = ioctl_decode_command_number(tcp);
+ if (!(ret & IOCTL_NUMBER_STOP_LOOKUP)) {
+ iop = ioctl_lookup(tcp->u_arg[1]);
+ if (iop) {
+ if (ret)
+ tprints(" or ");
+ tprints(iop->symbol);
+ while ((iop = ioctl_next_match(iop)))
+ tprintf(" or %s", iop->symbol);
+ } else if (!ret) {
+ ioctl_print_code(tcp->u_arg[1]);
+ }
+ }
+ ret = ioctl_decode(tcp);
+ } else {
+ ret = ioctl_decode(tcp) | RVAL_DECODED;
+ }
+
+ if (ret & RVAL_IOCTL_DECODED) {
+ ret &= ~RVAL_IOCTL_DECODED;
+ ret |= RVAL_DECODED;
+ } else if (ret & RVAL_DECODED) {
+ tprintf(", %#" PRI_klx, tcp->u_arg[2]);
+ }
+
+ return ret;
+}
projects / strace / blobdiff