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https://github.com/RGBCube/serenity
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2a78bf8596
The Process::Handler type has KResultOr<FlatPtr> as its return type. Using a different return type with an equally-sized template parameter sort of works but breaks once that condition is no longer true, e.g. for KResultOr<int> on x86_64. Ideally the syscall handlers would also take FlatPtrs as their args so we can get rid of the reinterpret_cast for the function pointer but I didn't quite feel like cleaning that up as well.
78 lines
2.6 KiB
C++
78 lines
2.6 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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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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