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From c658eb981bfc302aafe5be6e4118a9c0a3f1735e Mon Sep 17 00:00:00 2001
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From: Zhibin Li <08826794brmt@gmail.com>
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Date: Wed, 1 Aug 2018 17:53:57 +0800
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Subject: [PATCH 02/27] evdev: fix decoding of EVIOCGBIT(0, ...)
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There is a comment in drivers/input/evdev.c which says:
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/* EV_SYN==0 is EV_CNT, _not_ SYN_CNT, see EVIOCGBIT */
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That is, EVIOCGBIT(0, ...) should return a bit mask with supported
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event types instead of SYN_* event codes.
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* defs.h (evdev_ev): New prototype.
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* evdev.c: Include "xlat/evdev_ev.h" and remove "xlat/evdev_sync.h".
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(bit_ioctl) <case EV_SYN>: Replace EV_SYN with 0, use evdev_ev
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with XT_SORTED in decode_bitset invocation instead.
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* ioctl.c: Do not include "xlat/evdev_ev.h".
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(evdev_decode_number): Print nr == 0x20 as "0" instead of "EV_SYN".
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* tests/ioctl_evdev.c (main): Use 0 instead of EV_SYN in EVIOCGBIT
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output.
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* xlat/evdev_sync.in: Remove.
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Additional changes:
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xlat/evdev_ev.h (auto-generated from xlat/evdev_ev.in)
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Co-Authored-by: Dmitry V. Levin <ldv@altlinux.org>
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Fixes: v4.10~89 "Add decoding for evdev ioctls"
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---
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defs.h | 1 +
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evdev.c | 8 ++++----
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ioctl.c | 7 ++++---
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tests/ioctl_evdev.c | 2 +-
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xlat/evdev_sync.in | 5 -----
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5 files changed, 10 insertions(+), 13 deletions(-)
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delete mode 100644 xlat/evdev_sync.in
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Index: strace-4.24/defs.h
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===================================================================
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--- strace-4.24.orig/defs.h 2019-03-11 12:34:15.719549018 +0100
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+++ strace-4.24/defs.h 2019-03-11 12:47:05.976567233 +0100
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@@ -330,6 +330,7 @@
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/** Number of elements in evdev_abs array without the terminating record. */
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extern const size_t evdev_abs_size;
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+extern const struct xlat evdev_ev[];
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extern const struct xlat iffflags[];
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extern const struct xlat ip_type_of_services[];
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extern const struct xlat ipc_private[];
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Index: strace-4.24/evdev.c
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===================================================================
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--- strace-4.24.orig/evdev.c 2019-03-11 12:34:21.911484926 +0100
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+++ strace-4.24/evdev.c 2019-03-11 12:47:05.976567233 +0100
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@@ -30,6 +30,7 @@
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#include "defs.h"
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#include "xlat/evdev_abs.h"
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+#include "xlat/evdev_ev.h"
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#ifdef HAVE_LINUX_INPUT_H
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@@ -47,7 +48,6 @@
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# include "xlat/evdev_relative_axes.h"
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# include "xlat/evdev_snd.h"
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# include "xlat/evdev_switch.h"
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-# include "xlat/evdev_sync.h"
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# ifndef SYN_MAX
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# define SYN_MAX 0xf
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@@ -258,9 +258,9 @@
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const kernel_ulong_t arg)
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{
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switch (ev_nr) {
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- case EV_SYN:
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- return decode_bitset(tcp, arg, evdev_sync,
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- SYN_MAX, "SYN_???", XT_INDEXED);
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+ case 0:
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+ return decode_bitset(tcp, arg, evdev_ev,
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+ EV_MAX, "EV_???", XT_SORTED);
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case EV_KEY:
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return decode_bitset(tcp, arg, evdev_keycode,
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KEY_MAX, "KEY_???", XT_INDEXED);
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Index: strace-4.24/ioctl.c
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===================================================================
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--- strace-4.24.orig/ioctl.c 2019-03-11 12:34:15.719549018 +0100
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+++ strace-4.24/ioctl.c 2019-03-11 12:47:05.976567233 +0100
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@@ -33,8 +33,6 @@
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#include <linux/ioctl.h>
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#include "xlat/ioctl_dirs.h"
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-#include "xlat/evdev_ev.h"
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-
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static int
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compare(const void *a, const void *b)
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{
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@@ -99,7 +97,10 @@
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if (nr >= 0x20 && nr <= 0x20 + 0x1f) {
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tprints("EVIOCGBIT(");
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- printxval(evdev_ev, nr - 0x20, "EV_???");
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+ if (nr == 0x20)
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+ tprintf("0");
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+ else
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+ printxval(evdev_ev, nr - 0x20, "EV_???");
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tprintf(", %u)", _IOC_SIZE(code));
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return 1;
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} else if (nr >= 0x40 && nr <= 0x40 + 0x3f) {
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Index: strace-4.24/tests/ioctl_evdev.c
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===================================================================
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--- strace-4.24.orig/tests/ioctl_evdev.c 2019-03-11 12:34:15.719549018 +0100
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+++ strace-4.24/tests/ioctl_evdev.c 2019-03-11 12:47:05.977567222 +0100
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@@ -138,7 +138,7 @@
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TEST_NULL_ARG_EX(EVIOCGABS(0x3f), "EVIOCGABS(0x3f /* ABS_??? */)");
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TEST_NULL_ARG_EX(EVIOCSABS(0x3f), "EVIOCSABS(0x3f /* ABS_??? */)");
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- TEST_NULL_ARG(EVIOCGBIT(EV_SYN, 0));
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+ TEST_NULL_ARG(EVIOCGBIT(0, 0));
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TEST_NULL_ARG(EVIOCGBIT(EV_KEY, 1));
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TEST_NULL_ARG(EVIOCGBIT(EV_REL, 2));
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TEST_NULL_ARG(EVIOCGBIT(EV_ABS, 3));
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Index: strace-4.24/xlat/evdev_sync.in
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===================================================================
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--- strace-4.24.orig/xlat/evdev_sync.in 2019-03-11 12:34:15.719549018 +0100
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+++ /dev/null 1970-01-01 00:00:00.000000000 +0000
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@@ -1,5 +0,0 @@
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-#value_indexed
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-SYN_REPORT 0
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-SYN_CONFIG 1
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-SYN_MT_REPORT 2
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-SYN_DROPPED 3
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Index: strace-4.24/xlat/evdev_ev.h
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===================================================================
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--- strace-4.24.orig/xlat/evdev_ev.h 2018-08-14 02:44:11.000000000 +0200
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+++ strace-4.24/xlat/evdev_ev.h 2019-03-11 12:48:32.390670458 +0100
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@@ -90,13 +90,8 @@
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#ifndef XLAT_MACROS_ONLY
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-# ifdef IN_MPERS
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+# ifndef IN_MPERS
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-# error static const struct xlat evdev_ev in mpers mode
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-
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-# else
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-
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-static
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const struct xlat evdev_ev[] = {
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XLAT(EV_SYN),
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XLAT(EV_KEY),
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