diff options
Diffstat (limited to 'ChocolArm64/Memory/MemoryManagementUnix.cs')
-rw-r--r-- | ChocolArm64/Memory/MemoryManagementUnix.cs | 70 |
1 files changed, 0 insertions, 70 deletions
diff --git a/ChocolArm64/Memory/MemoryManagementUnix.cs b/ChocolArm64/Memory/MemoryManagementUnix.cs deleted file mode 100644 index fe3cfb7e..00000000 --- a/ChocolArm64/Memory/MemoryManagementUnix.cs +++ /dev/null @@ -1,70 +0,0 @@ -using Mono.Unix.Native; -using System; - -namespace ChocolArm64.Memory -{ - static class MemoryManagementUnix - { - public static IntPtr Allocate(ulong size) - { - ulong pageSize = (ulong)Syscall.sysconf(SysconfName._SC_PAGESIZE); - - const MmapProts prot = MmapProts.PROT_READ | MmapProts.PROT_WRITE; - - const MmapFlags flags = MmapFlags.MAP_PRIVATE | MmapFlags.MAP_ANONYMOUS; - - IntPtr ptr = Syscall.mmap(IntPtr.Zero, size + pageSize, prot, flags, -1, 0); - - if (ptr == IntPtr.Zero) - { - throw new OutOfMemoryException(); - } - - unsafe - { - ptr = new IntPtr(ptr.ToInt64() + (long)pageSize); - - *((ulong*)ptr - 1) = size; - } - - return ptr; - } - - public static bool Reprotect(IntPtr address, ulong size, MemoryProtection protection) - { - MmapProts prot = GetProtection(protection); - - return Syscall.mprotect(address, size, prot) == 0; - } - - private static MmapProts GetProtection(MemoryProtection protection) - { - switch (protection) - { - case MemoryProtection.None: return MmapProts.PROT_NONE; - case MemoryProtection.Read: return MmapProts.PROT_READ; - case MemoryProtection.ReadAndWrite: return MmapProts.PROT_READ | MmapProts.PROT_WRITE; - case MemoryProtection.ReadAndExecute: return MmapProts.PROT_READ | MmapProts.PROT_EXEC; - case MemoryProtection.Execute: return MmapProts.PROT_EXEC; - - default: throw new ArgumentException($"Invalid permission \"{protection}\"."); - } - } - - public static bool Free(IntPtr address) - { - ulong pageSize = (ulong)Syscall.sysconf(SysconfName._SC_PAGESIZE); - - ulong size; - - unsafe - { - size = *((ulong*)address - 1); - - address = new IntPtr(address.ToInt64() - (long)pageSize); - } - - return Syscall.munmap(address, size + pageSize) == 0; - } - } -}
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