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https://github.com/RGBCube/serenity
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bad6d50b86
This change lays the foundation for making the require_promise return an error hand handling the process abort outside of the syscall implementations, to avoid cases where we would leak resources. It also has the advantage that it makes removes a gs pointer read to look up the current thread, then process for every syscall. We can instead go through the Process this pointer in most cases.
61 lines
2.3 KiB
C++
61 lines
2.3 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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ErrorOr<FlatPtr> Process::sys$setkeymap(Userspace<const Syscall::SC_setkeymap_params*> user_params)
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{
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VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this);
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require_promise(Pledge::setkeymap);
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if (!is_superuser())
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return EPERM;
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auto params = TRY(copy_typed_from_user(user_params));
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Keyboard::CharacterMapData character_map_data;
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TRY(copy_n_from_user(character_map_data.map, params.map, CHAR_MAP_SIZE));
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TRY(copy_n_from_user(character_map_data.shift_map, params.shift_map, CHAR_MAP_SIZE));
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TRY(copy_n_from_user(character_map_data.alt_map, params.alt_map, CHAR_MAP_SIZE));
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TRY(copy_n_from_user(character_map_data.altgr_map, params.altgr_map, CHAR_MAP_SIZE));
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TRY(copy_n_from_user(character_map_data.shift_altgr_map, params.shift_altgr_map, CHAR_MAP_SIZE));
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auto map_name = TRY(get_syscall_path_argument(params.map_name));
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if (map_name->length() > map_name_max_size)
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return ENAMETOOLONG;
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HIDManagement::the().set_maps(character_map_data, map_name->view());
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return 0;
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}
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ErrorOr<FlatPtr> Process::sys$getkeymap(Userspace<const Syscall::SC_getkeymap_params*> user_params)
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{
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VERIFY_NO_PROCESS_BIG_LOCK(this);
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require_promise(Pledge::getkeymap);
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auto params = TRY(copy_typed_from_user(user_params));
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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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TRY(copy_to_user(params.map, character_maps.map, CHAR_MAP_SIZE * sizeof(u32)));
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TRY(copy_to_user(params.shift_map, character_maps.shift_map, CHAR_MAP_SIZE * sizeof(u32)));
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TRY(copy_to_user(params.alt_map, character_maps.alt_map, CHAR_MAP_SIZE * sizeof(u32)));
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TRY(copy_to_user(params.altgr_map, character_maps.altgr_map, CHAR_MAP_SIZE * sizeof(u32)));
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TRY(copy_to_user(params.shift_altgr_map, character_maps.shift_altgr_map, CHAR_MAP_SIZE * sizeof(u32)));
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if (params.map_name.size < keymap_name.length())
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return ENAMETOOLONG;
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TRY(copy_to_user(params.map_name.data, keymap_name.characters(), keymap_name.length()));
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return 0;
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}
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}
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