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Kernel: Declare syscall handlers with "using" instead of "typedef"

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Also use bit_cast to avoid -Wcast-function-type warning.
This commit is contained in:
Brian Gianforcaro 2021-09-04 12:53:24 -07:00 • committed by Linus Groh
parent 9d1b27263f
commit 3d12d0f408
1 changed files with 5 additions and 5 deletions
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10
Kernel/Syscall.cpp
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@ -88,15 +88,15 @@ UNMAP_AFTER_INIT void initialize()
register_user_callable_interrupt_handler(syscall_vector, syscall_asm_entry);
}
#pragma GCC diagnostic ignored "-Wcast-function-type"
typedef KResultOr<FlatPtr> (Process::*Handler)(FlatPtr, FlatPtr, FlatPtr, FlatPtr);
typedef KResultOr<FlatPtr> (Process::*HandlerWithRegisterState)(RegisterState&);
using Handler = auto (Process::*)(FlatPtr, FlatPtr, FlatPtr, FlatPtr) -> KResultOr<FlatPtr>;
using HandlerWithRegisterState = auto (Process::*)(RegisterState&) -> KResultOr<FlatPtr>;
struct HandlerMetadata {
Handler handler;
NeedsBigProcessLock needs_lock;
};
#define __ENUMERATE_SYSCALL(sys_call, needs_lock) { reinterpret_cast<Handler>(&Process::sys$##sys_call), needs_lock },
#define __ENUMERATE_SYSCALL(sys_call, needs_lock) { bit_cast<Handler>(&Process::sys$##sys_call), needs_lock },
static const HandlerMetadata s_syscall_table[] = {
ENUMERATE_SYSCALLS(__ENUMERATE_SYSCALL)
};
@ -153,7 +153,7 @@ KResultOr<FlatPtr> handle(RegisterState& regs, FlatPtr function, FlatPtr arg1, F
KResultOr<FlatPtr> result { FlatPtr(nullptr) };
if (function == SC_fork || function == SC_sigreturn) {
// These syscalls want the RegisterState& rather than individual parameters.
auto handler = (HandlerWithRegisterState)syscall_metadata.handler;
auto handler = bit_cast<HandlerWithRegisterState>(syscall_metadata.handler);
result = (process.*(handler))(regs);
} else {
result = (process.*(syscall_metadata.handler))(arg1, arg2, arg3, arg4);