Ryujinx/ARMeilleure/Signal/UnixSignalHandlerRegistration.cs
gdkchan 5e0f8e8738
Implement JIT Arm64 backend (#4114)
* Implement JIT Arm64 backend

* PPTC version bump

* Address some feedback from Arm64 JIT PR

* Address even more PR feedback

* Remove unused IsPageAligned function

* Sync Qc flag before calls

* Fix comment and remove unused enum

* Address riperiperi PR feedback

* Delete Breakpoint IR instruction that was only implemented for Arm64
2023-01-10 19:16:59 -03:00

83 lines
2.5 KiB
C#

using System;
using System.Runtime.InteropServices;
namespace ARMeilleure.Signal
{
static partial class UnixSignalHandlerRegistration
{
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public unsafe struct SigSet
{
fixed long sa_mask[16];
}
[StructLayout(LayoutKind.Sequential, Pack = 1)]
public struct SigAction
{
public IntPtr sa_handler;
public SigSet sa_mask;
public int sa_flags;
public IntPtr sa_restorer;
}
private const int SIGSEGV = 11;
private const int SIGBUS = 10;
private const int SA_SIGINFO = 0x00000004;
[LibraryImport("libc", SetLastError = true)]
private static partial int sigaction(int signum, ref SigAction sigAction, out SigAction oldAction);
[LibraryImport("libc", SetLastError = true)]
private static partial int sigaction(int signum, IntPtr sigAction, out SigAction oldAction);
[LibraryImport("libc", SetLastError = true)]
private static partial int sigemptyset(ref SigSet set);
public static SigAction GetSegfaultExceptionHandler()
{
int result = sigaction(SIGSEGV, IntPtr.Zero, out SigAction old);
if (result != 0)
{
throw new InvalidOperationException($"Could not get SIGSEGV sigaction. Error: {result}");
}
return old;
}
public static SigAction RegisterExceptionHandler(IntPtr action)
{
SigAction sig = new SigAction
{
sa_handler = action,
sa_flags = SA_SIGINFO
};
sigemptyset(ref sig.sa_mask);
int result = sigaction(SIGSEGV, ref sig, out SigAction old);
if (result != 0)
{
throw new InvalidOperationException($"Could not register SIGSEGV sigaction. Error: {result}");
}
if (OperatingSystem.IsMacOS())
{
result = sigaction(SIGBUS, ref sig, out _);
if (result != 0)
{
throw new InvalidOperationException($"Could not register SIGBUS sigaction. Error: {result}");
}
}
return old;
}
public static bool RestoreExceptionHandler(SigAction oldAction)
{
return sigaction(SIGSEGV, ref oldAction, out SigAction _) == 0 && (!OperatingSystem.IsMacOS() || sigaction(SIGBUS, ref oldAction, out SigAction _) == 0);
}
}
}