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https://github.com/RGBCube/serenity
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9201a06027
Before we start disabling acquisition of the big process lock for specific syscalls, make sure to document and assert that all the lock is held during all syscalls.
79 lines
2.7 KiB
C++
79 lines
2.7 KiB
C++
/*
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* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
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*
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* SPDX-License-Identifier: BSD-2-Clause
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*/
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#include <Kernel/Devices/HID/HIDManagement.h>
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#include <Kernel/Process.h>
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namespace Kernel {
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constexpr size_t map_name_max_size = 50;
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KResultOr<FlatPtr> Process::sys$setkeymap(Userspace<const Syscall::SC_setkeymap_params*> user_params)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
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REQUIRE_PROMISE(setkeymap);
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if (!is_superuser())
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return EPERM;
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Syscall::SC_setkeymap_params params;
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if (!copy_from_user(¶ms, user_params))
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return EFAULT;
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Keyboard::CharacterMapData character_map_data;
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if (!copy_n_from_user(character_map_data.map, params.map, CHAR_MAP_SIZE))
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return EFAULT;
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if (!copy_n_from_user(character_map_data.shift_map, params.shift_map, CHAR_MAP_SIZE))
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return EFAULT;
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if (!copy_n_from_user(character_map_data.alt_map, params.alt_map, CHAR_MAP_SIZE))
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return EFAULT;
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if (!copy_n_from_user(character_map_data.altgr_map, params.altgr_map, CHAR_MAP_SIZE))
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return EFAULT;
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if (!copy_n_from_user(character_map_data.shift_altgr_map, params.shift_altgr_map, CHAR_MAP_SIZE))
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return EFAULT;
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auto map_name = get_syscall_path_argument(params.map_name);
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if (map_name.is_error())
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return map_name.error();
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if (map_name.value()->length() > map_name_max_size)
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return ENAMETOOLONG;
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HIDManagement::the().set_maps(character_map_data, map_name.value()->view());
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return 0;
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}
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KResultOr<FlatPtr> Process::sys$getkeymap(Userspace<const Syscall::SC_getkeymap_params*> user_params)
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{
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REQUIRE_PROMISE(getkeymap);
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Syscall::SC_getkeymap_params params;
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if (!copy_from_user(¶ms, user_params))
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return EFAULT;
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String keymap_name = HIDManagement::the().keymap_name();
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const Keyboard::CharacterMapData& character_maps = HIDManagement::the().character_maps();
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if (!copy_to_user(params.map, character_maps.map, CHAR_MAP_SIZE * sizeof(u32)))
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return EFAULT;
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if (!copy_to_user(params.shift_map, character_maps.shift_map, CHAR_MAP_SIZE * sizeof(u32)))
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return EFAULT;
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if (!copy_to_user(params.alt_map, character_maps.alt_map, CHAR_MAP_SIZE * sizeof(u32)))
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return EFAULT;
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if (!copy_to_user(params.altgr_map, character_maps.altgr_map, CHAR_MAP_SIZE * sizeof(u32)))
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return EFAULT;
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if (!copy_to_user(params.shift_altgr_map, character_maps.shift_altgr_map, CHAR_MAP_SIZE * sizeof(u32)))
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return EFAULT;
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if (params.map_name.size < keymap_name.length())
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return ENAMETOOLONG;
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if (!copy_to_user(params.map_name.data, keymap_name.characters(), keymap_name.length()))
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return EFAULT;
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return 0;
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}
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}
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