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Kernel: Replace KResult and KResultOr<T> with Error and ErrorOr<T>

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We now use AK::Error and AK::ErrorOr<T> in both kernel and userspace!
This was a slightly tedious refactoring that took a long time, so it's
not unlikely that some bugs crept in.

Nevertheless, it does pass basic functionality testing, and it's just
real nice to finally see the same pattern in all contexts. :^)
This commit is contained in:
Andreas Kling 2021-11-08 00:51:39 +01:00
parent 7ee10c6926
commit 79fa9765ca
262 changed files with 2415 additions and 2600 deletions
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12
Kernel/Syscall.cpp
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@ -81,15 +81,15 @@ NEVER_INLINE NAKED void syscall_asm_entry()
namespace Syscall {
static KResultOr<FlatPtr> handle(RegisterState&, FlatPtr function, FlatPtr arg1, FlatPtr arg2, FlatPtr arg3, FlatPtr arg4);
static ErrorOr<FlatPtr> handle(RegisterState&, FlatPtr function, FlatPtr arg1, FlatPtr arg2, FlatPtr arg3, FlatPtr arg4);
UNMAP_AFTER_INIT void initialize()
{
register_user_callable_interrupt_handler(syscall_vector, syscall_asm_entry);
}
using Handler = auto (Process::*)(FlatPtr, FlatPtr, FlatPtr, FlatPtr) -> KResultOr<FlatPtr>;
using HandlerWithRegisterState = auto (Process::*)(RegisterState&) -> KResultOr<FlatPtr>;
using Handler = auto (Process::*)(FlatPtr, FlatPtr, FlatPtr, FlatPtr) -> ErrorOr<FlatPtr>;
using HandlerWithRegisterState = auto (Process::*)(RegisterState&) -> ErrorOr<FlatPtr>;
struct HandlerMetadata {
Handler handler;
@ -102,7 +102,7 @@ static const HandlerMetadata s_syscall_table[] = {
};
#undef __ENUMERATE_SYSCALL
KResultOr<FlatPtr> handle(RegisterState& regs, FlatPtr function, FlatPtr arg1, FlatPtr arg2, FlatPtr arg3, FlatPtr arg4)
ErrorOr<FlatPtr> handle(RegisterState& regs, FlatPtr function, FlatPtr arg1, FlatPtr arg2, FlatPtr arg3, FlatPtr arg4)
{
VERIFY_INTERRUPTS_ENABLED();
auto current_thread = Thread::current();
@ -148,7 +148,7 @@ KResultOr<FlatPtr> handle(RegisterState& regs, FlatPtr function, FlatPtr arg1, F
}
}
KResultOr<FlatPtr> result { FlatPtr(nullptr) };
ErrorOr<FlatPtr> result { FlatPtr(nullptr) };
if (function == SC_fork || function == SC_sigreturn) {
// These syscalls want the RegisterState& rather than individual parameters.
auto handler = bit_cast<HandlerWithRegisterState>(syscall_metadata.handler);
@ -214,7 +214,7 @@ NEVER_INLINE void syscall_handler(TrapFrame* trap)
auto result = Syscall::handle(regs, function, arg1, arg2, arg3, arg4);
if (result.is_error()) {
regs.set_return_reg(result.error().error());
regs.set_return_reg(-result.error().code());
} else {
regs.set_return_reg(result.value());
}