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-rw-r--r--src/VBox/Runtime/common/string/strcpy.asm93
1 files changed, 93 insertions, 0 deletions
diff --git a/src/VBox/Runtime/common/string/strcpy.asm b/src/VBox/Runtime/common/string/strcpy.asm
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+++ b/src/VBox/Runtime/common/string/strcpy.asm
@@ -0,0 +1,93 @@
+; $Id: strcpy.asm $
+;; @file
+; IPRT - No-CRT strcpy - AMD64 & X86.
+;
+
+;
+; Copyright (C) 2006-2019 Oracle Corporation
+;
+; This file is part of VirtualBox Open Source Edition (OSE), as
+; available from http://www.virtualbox.org. This file is free software;
+; you can redistribute it and/or modify it under the terms of the GNU
+; General Public License (GPL) as published by the Free Software
+; Foundation, in version 2 as it comes in the "COPYING" file of the
+; VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+; hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+;
+; The contents of this file may alternatively be used under the terms
+; of the Common Development and Distribution License Version 1.0
+; (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+; VirtualBox OSE distribution, in which case the provisions of the
+; CDDL are applicable instead of those of the GPL.
+;
+; You may elect to license modified versions of this file under the
+; terms and conditions of either the GPL or the CDDL or both.
+;
+
+%include "iprt/asmdefs.mac"
+
+BEGINCODE
+
+;;
+; @param pszDst gcc: rdi msc: rcx x86:[esp+4] wcall:eax
+; @param pszSrc gcc: rsi msc: rdx x86:[esp+8] wcall:edx
+RT_NOCRT_BEGINPROC strcpy
+ ; input
+%ifdef RT_ARCH_AMD64
+ %ifdef ASM_CALL64_MSC
+ %define pszDst rcx
+ %define pszSrc rdx
+ %else
+ %define pszDst rdi
+ %define pszSrc rsi
+ %endif
+ mov r8, pszDst
+%else
+ %ifdef ASM_CALL32_WATCOM
+ mov ecx, eax
+ %else
+ mov ecx, [esp + 4]
+ mov edx, [esp + 8]
+ %endif
+ %define pszDst ecx
+ %define pszSrc edx
+ push pszDst
+%endif
+
+ ;
+ ; The loop.
+ ;
+.next:
+ mov al, [pszSrc]
+ mov [pszDst], al
+ test al, al
+ jz .done
+
+ mov al, [pszSrc + 1]
+ mov [pszDst + 1], al
+ test al, al
+ jz .done
+
+ mov al, [pszSrc + 2]
+ mov [pszDst + 2], al
+ test al, al
+ jz .done
+
+ mov al, [pszSrc + 3]
+ mov [pszDst + 3], al
+ test al, al
+ jz .done
+
+ add pszDst, 4
+ add pszSrc, 4
+ jmp .next
+
+.done:
+%ifdef RT_ARCH_AMD64
+ mov rax, r8
+%else
+ pop eax
+%endif
+ ret
+ENDPROC RT_NOCRT(strcpy)
+