mirror of
https://github.com/SerenityOS/serenity
synced 2024-09-20 00:12:20 +00:00
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.
77 lines
2 KiB
C++
77 lines
2 KiB
C++
/*
|
|
* Copyright (c) 2018-2020, Andreas Kling <kling@serenityos.org>
|
|
*
|
|
* SPDX-License-Identifier: BSD-2-Clause
|
|
*/
|
|
|
|
#include <AK/StringView.h>
|
|
#include <Kernel/Process.h>
|
|
|
|
namespace Kernel {
|
|
|
|
KResultOr<FlatPtr> Process::sys$pledge(Userspace<const Syscall::SC_pledge_params*> user_params)
|
|
{
|
|
Syscall::SC_pledge_params params;
|
|
if (!copy_from_user(¶ms, user_params))
|
|
return EFAULT;
|
|
|
|
if (params.promises.length > 1024 || params.execpromises.length > 1024)
|
|
return E2BIG;
|
|
|
|
String promises;
|
|
if (params.promises.characters) {
|
|
promises = copy_string_from_user(params.promises);
|
|
if (promises.is_null())
|
|
return EFAULT;
|
|
}
|
|
|
|
String execpromises;
|
|
if (params.execpromises.characters) {
|
|
execpromises = copy_string_from_user(params.execpromises);
|
|
if (execpromises.is_null())
|
|
return EFAULT;
|
|
}
|
|
|
|
auto parse_pledge = [&](auto& pledge_spec, u32& mask) {
|
|
auto parts = pledge_spec.split_view(' ');
|
|
for (auto& part : parts) {
|
|
#define __ENUMERATE_PLEDGE_PROMISE(x) \
|
|
if (part == #x) { \
|
|
mask |= (1u << (u32)Pledge::x); \
|
|
continue; \
|
|
}
|
|
ENUMERATE_PLEDGE_PROMISES
|
|
#undef __ENUMERATE_PLEDGE_PROMISE
|
|
return false;
|
|
}
|
|
return true;
|
|
};
|
|
|
|
ProtectedDataMutationScope scope { *this };
|
|
|
|
if (!promises.is_null()) {
|
|
u32 new_promises = 0;
|
|
if (!parse_pledge(promises, new_promises))
|
|
return EINVAL;
|
|
if (m_promises && (!new_promises || new_promises & ~m_promises))
|
|
return EPERM;
|
|
|
|
m_has_promises = true;
|
|
m_promises = new_promises;
|
|
}
|
|
|
|
if (!execpromises.is_null()) {
|
|
u32 new_execpromises = 0;
|
|
if (!parse_pledge(execpromises, new_execpromises))
|
|
return EINVAL;
|
|
if (m_execpromises && (!new_execpromises || new_execpromises & ~m_execpromises))
|
|
return EPERM;
|
|
m_has_execpromises = true;
|
|
m_execpromises = new_execpromises;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
}
|