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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
Download patch file Download diff file Expand all files Collapse all files

23
Kernel/Syscalls/sigaction.cpp
View file

@ -10,7 +10,7 @@
namespace Kernel {
KResultOr<FlatPtr> Process::sys$sigprocmask(int how, Userspace<const sigset_t*> set, Userspace<sigset_t*> old_set)
ErrorOr<FlatPtr> Process::sys$sigprocmask(int how, Userspace<const sigset_t*> set, Userspace<sigset_t*> old_set)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(sigaction);
@ -41,15 +41,16 @@ KResultOr<FlatPtr> Process::sys$sigprocmask(int how, Userspace<const sigset_t*>
return 0;
}
KResultOr<FlatPtr> Process::sys$sigpending(Userspace<sigset_t*> set)
ErrorOr<FlatPtr> Process::sys$sigpending(Userspace<sigset_t*> set)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(stdio);
auto pending_signals = Thread::current()->pending_signals();
return copy_to_user(set, &pending_signals);
TRY(copy_to_user(set, &pending_signals));
return 0;
}
KResultOr<FlatPtr> Process::sys$sigaction(int signum, Userspace<const sigaction*> user_act, Userspace<sigaction*> user_old_act)
ErrorOr<FlatPtr> Process::sys$sigaction(int signum, Userspace<const sigaction*> user_act, Userspace<sigaction*> user_old_act)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(sigaction);
@ -73,24 +74,24 @@ KResultOr<FlatPtr> Process::sys$sigaction(int signum, Userspace<const sigaction*
return 0;
}
KResultOr<FlatPtr> Process::sys$sigreturn([[maybe_unused]] RegisterState& registers)
ErrorOr<FlatPtr> Process::sys$sigreturn([[maybe_unused]] RegisterState& registers)
{
VERIFY_PROCESS_BIG_LOCK_ACQUIRED(this)
REQUIRE_PROMISE(stdio);
SmapDisabler disabler;
#if ARCH(I386)
//Here, we restore the state pushed by dispatch signal and asm_signal_trampoline.
// Here, we restore the state pushed by dispatch signal and asm_signal_trampoline.
u32* stack_ptr = (u32*)registers.userspace_esp;
u32 smuggled_eax = *stack_ptr;
//pop the stored eax, ebp, return address, handler and signal code
// pop the stored eax, ebp, return address, handler and signal code
stack_ptr += 5;
Thread::current()->m_signal_mask = *stack_ptr;
stack_ptr++;
//pop edi, esi, ebp, esp, ebx, edx, ecx and eax
// pop edi, esi, ebp, esp, ebx, edx, ecx and eax
memcpy(&registers.edi, stack_ptr, 8 * sizeof(FlatPtr));
stack_ptr += 8;
@ -103,17 +104,17 @@ KResultOr<FlatPtr> Process::sys$sigreturn([[maybe_unused]] RegisterState& regist
registers.userspace_esp = registers.esp;
return smuggled_eax;
#else
//Here, we restore the state pushed by dispatch signal and asm_signal_trampoline.
// Here, we restore the state pushed by dispatch signal and asm_signal_trampoline.
FlatPtr* stack_ptr = (FlatPtr*)registers.userspace_rsp;
FlatPtr smuggled_rax = *stack_ptr;
//pop the stored rax, rbp, return address, handler and signal code
// pop the stored rax, rbp, return address, handler and signal code
stack_ptr += 5;
Thread::current()->m_signal_mask = *stack_ptr;
stack_ptr++;
//pop rdi, rsi, rbp, rsp, rbx, rdx, rcx, rax, r8, r9, r10, r11, r12, r13, r14 and r15
// pop rdi, rsi, rbp, rsp, rbx, rdx, rcx, rax, r8, r9, r10, r11, r12, r13, r14 and r15
memcpy(&registers.rdi, stack_ptr, 16 * sizeof(FlatPtr));
stack_ptr += 16;