glebfm/strace
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

evdev.c: reorder ioctl command checks

Browse Source 
Change the order of ioctl command cheks to match the kernel:
1st, check for fixed-number fixed-length commands,
2nd, check for fixed-number variable-length commands,
3rd, check for multi-number fixed-length commands,
4thm check for multi-number variable-length commands.

* evdev.c (evdev_read_ioctl, evdev_write_ioctl): Reorder
ioctl command checks.
This commit is contained in:
Дмитрий Левин 2016-05-27 00:40:10 +00:00
parent 2114e08a87
commit 8a18f80a37
1 changed files with 72 additions and 66 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

136
evdev.c
View File

@ -308,11 +308,73 @@ repeat_ioctl(struct tcb *tcp, long arg)
# endif /* EVIOCGREP || EVIOCSREP */
static int
evdev_read_ioctl(struct tcb *tcp, const unsigned int code, long arg)
evdev_read_ioctl(struct tcb *tcp, const unsigned int code, const long arg)
{
if (syserror(tcp))
return 0;
/* fixed-number fixed-length commands */
switch (code) {
case EVIOCGVERSION:
tprints(", ");
printnum_int(tcp, arg, "%" PRIx32);
return 1;
case EVIOCGEFFECTS:
tprints(", ");
printnum_int(tcp, arg, "%" PRIu32);
return 1;
case EVIOCGID:
return getid_ioctl(tcp, arg);
# ifdef EVIOCGREP
case EVIOCGREP:
return repeat_ioctl(tcp, arg);;
# endif
case EVIOCGKEYCODE:
return keycode_ioctl(tcp, arg);
# ifdef EVIOCGKEYCODE_V2
case EVIOCGKEYCODE_V2:
return keycode_V2_ioctl(tcp, arg);
# endif
}
/* fixed-number variable-length commands */
switch (_IOC_NR(code)) {
# ifdef EVIOCGMTSLOTS
case _IOC_NR(EVIOCGMTSLOTS(0)):
return mtslots_ioctl(tcp, code, arg);
# endif
case _IOC_NR(EVIOCGNAME(0)):
case _IOC_NR(EVIOCGPHYS(0)):
case _IOC_NR(EVIOCGUNIQ(0)):
tprints(", ");
printstr(tcp, arg, tcp->u_rval - 1);
return 1;
# ifdef EVIOCGPROP
case _IOC_NR(EVIOCGPROP(0)):
return decode_bitset(tcp, arg,
evdev_prop, INPUT_PROP_MAX, "PROP_???");
# endif
case _IOC_NR(EVIOCGSND(0)):
return decode_bitset(tcp, arg,
evdev_snd, SND_MAX, "SND_???");
# ifdef EVIOCGSW
case _IOC_NR(EVIOCGSW(0)):
return decode_bitset(tcp, arg,
evdev_switch, SW_MAX, "SW_???");
# endif
case _IOC_NR(EVIOCGKEY(0)):
return decode_bitset(tcp, arg,
evdev_keycode, KEY_MAX, "KEY_???");
case _IOC_NR(EVIOCGLED(0)):
return decode_bitset(tcp, arg,
evdev_leds, LED_MAX, "LED_???");
}
/* multi-number fixed-length commands */
if ((_IOC_NR(code) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0)))
return abs_ioctl(tcp, arg);
/* multi-number variable-length commands */
if ((_IOC_NR(code) & ~EV_MAX) == _IOC_NR(EVIOCGBIT(0, 0))) {
switch (_IOC_NR(code) - 0x20) {
case EV_SYN:
@ -358,73 +420,13 @@ evdev_read_ioctl(struct tcb *tcp, const unsigned int code, long arg)
}
}
if ((_IOC_NR(code) & ~ABS_MAX) == _IOC_NR(EVIOCGABS(0)))
return abs_ioctl(tcp, arg);
switch (code) {
case EVIOCGVERSION:
tprints(", ");
printnum_int(tcp, arg, "%" PRIx32);
return 1;
case EVIOCGEFFECTS:
tprints(", ");
printnum_int(tcp, arg, "%" PRIu32);
return 1;
case EVIOCGID:
return getid_ioctl(tcp, arg);
# ifdef EVIOCGREP
case EVIOCGREP:
return repeat_ioctl(tcp, arg);;
# endif
case EVIOCGKEYCODE:
return keycode_ioctl(tcp, arg);
# ifdef EVIOCGKEYCODE_V2
case EVIOCGKEYCODE_V2:
return keycode_V2_ioctl(tcp, arg);
# endif
}
switch (_IOC_NR(code)) {
# ifdef EVIOCGMTSLOTS
case _IOC_NR(EVIOCGMTSLOTS(0)):
return mtslots_ioctl(tcp, code, arg);
# endif
case _IOC_NR(EVIOCGNAME(0)):
case _IOC_NR(EVIOCGPHYS(0)):
case _IOC_NR(EVIOCGUNIQ(0)):
tprints(", ");
printstr(tcp, arg, tcp->u_rval - 1);
return 1;
# ifdef EVIOCGPROP
case _IOC_NR(EVIOCGPROP(0)):
return decode_bitset(tcp, arg,
evdev_prop, INPUT_PROP_MAX, "PROP_???");
# endif
case _IOC_NR(EVIOCGSND(0)):
return decode_bitset(tcp, arg,
evdev_snd, SND_MAX, "SND_???");
# ifdef EVIOCGSW
case _IOC_NR(EVIOCGSW(0)):
return decode_bitset(tcp, arg,
evdev_switch, SW_MAX, "SW_???");
# endif
case _IOC_NR(EVIOCGKEY(0)):
return decode_bitset(tcp, arg,
evdev_keycode, KEY_MAX, "KEY_???");
case _IOC_NR(EVIOCGLED(0)):
return decode_bitset(tcp, arg,
evdev_leds, LED_MAX, "LED_???");
default:
return 0;
}
}
static int
evdev_write_ioctl(struct tcb *tcp, const unsigned int code, long arg)
evdev_write_ioctl(struct tcb *tcp, const unsigned int code, const long arg)
{
if ((_IOC_NR(code) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0)))
return abs_ioctl(tcp, arg);
/* fixed-number fixed-length commands */
switch (code) {
# ifdef EVIOCSREP
case EVIOCSREP:
@ -449,9 +451,13 @@ evdev_write_ioctl(struct tcb *tcp, const unsigned int code, long arg)
tprints(", ");
printnum_int(tcp, arg, "%u");
return 1;
default:
return 0;
}
/* multi-number fixed-length commands */
if ((_IOC_NR(code) & ~ABS_MAX) == _IOC_NR(EVIOCSABS(0)))
return abs_ioctl(tcp, arg);
return 0;
}
int