- add missing file

git-svn-id: http://svn.lfbs.rwth-aachen.de/svn/scc/trunk/MetalSVM@68 315a16e6-25f9-4109-90ae-ca3045a26c18

arch/x86/kernel/string.asm

@@ -0,0 +1,74 @@
+; 
+; Copyright 2010 Stefan Lankes, Chair for Operating Systems,
+;                               RWTH Aachen University
+;
+; Licensed under the Apache License, Version 2.0 (the "License");
+; you may not use this file except in compliance with the License.
+; You may obtain a copy of the License at
+;
+;     http://www.apache.org/licenses/LICENSE-2.0
+;
+; Unless required by applicable law or agreed to in writing, software
+; distributed under the License is distributed on an "AS IS" BASIS,
+; WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+; See the License for the specific language governing permissions and
+; limitations under the License.
+;
+; This file is part of metalsvm.
+
+; This is the kernel's entry point. We could either call main here,
+; or we can use this to setup the stack or other nice stuff, like
+; perhaps setting up the GDT and segments. Please note that interrupts
+; are disabled at this point: More on interrupts later!
+
+[BITS 32]
+SECTION .code
+global strcpy
+strcpy:
+   push ebp
+   mov ebp, esp
+   push edi
+   push esi
+
+   mov esi, [ebp+12]
+   mov edi, [ebp+8]
+
+L1:
+   lodsb
+   stosb
+   test al, al
+   jne L1
+   
+   mov eax, [ebp+8]
+   pop esi
+   pop edi
+   pop ebp
+   ret
+
+global strncpy
+strncpy:
+   push ebp
+   mov ebp, esp
+   push edi
+   push esi
+
+   mov ecx, [ebp+16]
+   mov esi, [ebp+12]
+   mov edi, [ebp+8]
+
+L2:
+   dec ecx
+   js L3
+   lodsb
+   stosb
+   test al, al
+   jne L1
+   rep
+   stosb
+
+L3:
+   mov eax, [ebp+8]
+   pop esi
+   pop edi
+   pop ebp
+   ret