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Kernel: Fix the return type for syscalls

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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.
This commit is contained in:
Gunnar Beutner 2021-06-28 20:59:35 +02:00 • committed by Andreas Kling
parent b6435372cc
commit 2a78bf8596
71 changed files with 313 additions and 301 deletions
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10
Kernel/Syscalls/process.cpp
View file

@ -9,19 +9,19 @@
namespace Kernel {
KResultOr<pid_t> Process::sys$getpid()
KResultOr<FlatPtr> Process::sys$getpid()
{
REQUIRE_PROMISE(stdio);
return pid().value();
}
KResultOr<pid_t> Process::sys$getppid()
KResultOr<FlatPtr> Process::sys$getppid()
{
REQUIRE_PROMISE(stdio);
return m_ppid.value();
}
KResultOr<int> Process::sys$get_process_name(Userspace<char*> buffer, size_t buffer_size)
KResultOr<FlatPtr> Process::sys$get_process_name(Userspace<char*> buffer, size_t buffer_size)
{
REQUIRE_PROMISE(stdio);
if (m_name.length() + 1 > buffer_size)
@ -32,7 +32,7 @@ KResultOr<int> Process::sys$get_process_name(Userspace<char*> buffer, size_t buf
return 0;
}
KResultOr<int> Process::sys$set_process_name(Userspace<const char*> user_name, size_t user_name_length)
KResultOr<FlatPtr> Process::sys$set_process_name(Userspace<const char*> user_name, size_t user_name_length)
{
REQUIRE_PROMISE(proc);
if (user_name_length > 256)
@ -47,7 +47,7 @@ KResultOr<int> Process::sys$set_process_name(Userspace<const char*> user_name, s
return 0;
}
KResultOr<int> Process::sys$set_coredump_metadata(Userspace<const Syscall::SC_set_coredump_metadata_params*> user_params)
KResultOr<FlatPtr> Process::sys$set_coredump_metadata(Userspace<const Syscall::SC_set_coredump_metadata_params*> user_params)
{
Syscall::SC_set_coredump_metadata_params params;
if (!copy_from_user(&params, user_params))