diff --git a/src/SharpEmu.Libs/Kernel/KernelMemoryCompatExports.cs b/src/SharpEmu.Libs/Kernel/KernelMemoryCompatExports.cs
index fd64d6df..432488da 100644
--- a/src/SharpEmu.Libs/Kernel/KernelMemoryCompatExports.cs
+++ b/src/SharpEmu.Libs/Kernel/KernelMemoryCompatExports.cs
@@ -1488,6 +1488,214 @@ public static class KernelMemoryCompatExports
         return (int)OrbisGen2Result.ORBIS_GEN2_OK;
     }
 
+    [SysAbiExport(
+        Nid = "ob5xAW4ln-0",
+        ExportName = "strchr",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libc")]
+    public static int Strchr(CpuContext ctx)
+    {
+        var address = ctx[CpuRegister.Rdi];
+        var needle = unchecked((byte)ctx[CpuRegister.Rsi]);
+        if (address == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        // The terminator counts as part of the scanned range, so strchr(s, '\0')
+        // returns a pointer to the string's null byte just like a native libc.
+        Span<byte> current = stackalloc byte[1];
+        for (ulong index = 0; index < 1_048_576; index++)
+        {
+            if (!TryReadCompat(ctx, address + index, current))
+            {
+                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+            }
+
+            if (current[0] == needle)
+            {
+                ctx[CpuRegister.Rax] = address + index;
+                return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+            }
+
+            if (current[0] == 0)
+            {
+                break;
+            }
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "9yDWMxEFdJU",
+        ExportName = "strrchr",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libc")]
+    public static int Strrchr(CpuContext ctx)
+    {
+        var address = ctx[CpuRegister.Rdi];
+        var needle = unchecked((byte)ctx[CpuRegister.Rsi]);
+        if (address == 0)
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ulong match = 0;
+        var found = false;
+        Span<byte> current = stackalloc byte[1];
+        for (ulong index = 0; index < 1_048_576; index++)
+        {
+            if (!TryReadCompat(ctx, address + index, current))
+            {
+                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+            }
+
+            if (current[0] == needle)
+            {
+                match = address + index;
+                found = true;
+            }
+
+            if (current[0] == 0)
+            {
+                break;
+            }
+        }
+
+        ctx[CpuRegister.Rax] = found ? match : 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "8u8lPzUEq+U",
+        ExportName = "memchr",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libc")]
+    public static int Memchr(CpuContext ctx)
+    {
+        var address = ctx[CpuRegister.Rdi];
+        var needle = unchecked((byte)ctx[CpuRegister.Rsi]);
+        var count = ctx[CpuRegister.Rdx];
+
+        Span<byte> current = stackalloc byte[1];
+        for (ulong index = 0; index < count; index++)
+        {
+            if (!TryReadCompat(ctx, address + index, current))
+            {
+                return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+            }
+
+            if (current[0] == needle)
+            {
+                ctx[CpuRegister.Rax] = address + index;
+                return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+            }
+        }
+
+        ctx[CpuRegister.Rax] = 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "Ls4tzzhimqQ",
+        ExportName = "strcat",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libc")]
+    public static int Strcat(CpuContext ctx)
+    {
+        var destination = ctx[CpuRegister.Rdi];
+        var source = ctx[CpuRegister.Rsi];
+        if (!TryReadCString(ctx, source, 1_048_576, out var sourceBytes))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        if (!TryReadCString(ctx, destination, 1_048_576, out var destinationBytes))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        // Overwrite the destination terminator and re-terminate after the copied bytes.
+        var appendAddress = destination + (ulong)destinationBytes.Length;
+        var payload = new byte[sourceBytes.Length + 1];
+        sourceBytes.CopyTo(payload.AsSpan());
+        if (!TryWriteCompat(ctx, appendAddress, payload))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = destination;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "kHg45qPC6f0",
+        ExportName = "strncat",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libc")]
+    public static int Strncat(CpuContext ctx)
+    {
+        var destination = ctx[CpuRegister.Rdi];
+        var source = ctx[CpuRegister.Rsi];
+        var limit = ctx[CpuRegister.Rdx];
+
+        // Bounding the source read by the count yields strncat's "at most n bytes"
+        // semantics while still stopping early at the source terminator.
+        if (!TryReadCString(ctx, source, limit, out var sourceBytes))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        if (!TryReadCString(ctx, destination, 1_048_576, out var destinationBytes))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        var appendAddress = destination + (ulong)destinationBytes.Length;
+        var payload = new byte[sourceBytes.Length + 1];
+        sourceBytes.CopyTo(payload.AsSpan());
+        if (!TryWriteCompat(ctx, appendAddress, payload))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        ctx[CpuRegister.Rax] = destination;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
+    [SysAbiExport(
+        Nid = "viiwFMaNamA",
+        ExportName = "strstr",
+        Target = Generation.Gen4 | Generation.Gen5,
+        LibraryName = "libc")]
+    public static int Strstr(CpuContext ctx)
+    {
+        var haystack = ctx[CpuRegister.Rdi];
+        var needle = ctx[CpuRegister.Rsi];
+        if (!TryReadCString(ctx, haystack, 1_048_576, out var haystackBytes))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        if (!TryReadCString(ctx, needle, 1_048_576, out var needleBytes))
+        {
+            return (int)OrbisGen2Result.ORBIS_GEN2_ERROR_MEMORY_FAULT;
+        }
+
+        // An empty needle matches at the start of the haystack.
+        if (needleBytes.Length == 0)
+        {
+            ctx[CpuRegister.Rax] = haystack;
+            return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+        }
+
+        var matchIndex = haystackBytes.AsSpan().IndexOf(needleBytes.AsSpan());
+        ctx[CpuRegister.Rax] = matchIndex >= 0 ? haystack + (ulong)matchIndex : 0;
+        return (int)OrbisGen2Result.ORBIS_GEN2_OK;
+    }
+
     [SysAbiExport(
         Nid = "QrZZdJ8XsX0",
         ExportName = "fputs",