From f215e02bf85f68d3a6106c2a1f4f7f063f819064 Mon Sep 17 00:00:00 2001 From: Daniel Baumann Date: Thu, 11 Apr 2024 10:17:27 +0200 Subject: Adding upstream version 7.0.14-dfsg. Signed-off-by: Daniel Baumann --- src/VBox/Runtime/common/string/strncpy.asm | 139 +++++++++++++++++++++++++++++ 1 file changed, 139 insertions(+) create mode 100644 src/VBox/Runtime/common/string/strncpy.asm (limited to 'src/VBox/Runtime/common/string/strncpy.asm') diff --git a/src/VBox/Runtime/common/string/strncpy.asm b/src/VBox/Runtime/common/string/strncpy.asm new file mode 100644 index 00000000..20a028dc --- /dev/null +++ b/src/VBox/Runtime/common/string/strncpy.asm @@ -0,0 +1,139 @@ +; $Id: strncpy.asm $ +;; @file +; IPRT - No-CRT strncpy - AMD64 & X86. +; + +; +; Copyright (C) 2006-2023 Oracle and/or its affiliates. +; +; This file is part of VirtualBox base platform packages, as +; available from https://www.virtualbox.org. +; +; This program is free software; you can redistribute it and/or +; modify it under the terms of the GNU General Public License +; as published by the Free Software Foundation, in version 3 of the +; License. +; +; This program is distributed in the hope that it will be useful, but +; WITHOUT ANY WARRANTY; without even the implied warranty of +; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU +; General Public License for more details. +; +; You should have received a copy of the GNU General Public License +; along with this program; if not, see . +; +; The contents of this file may alternatively be used under the terms +; of the Common Development and Distribution License Version 1.0 +; (CDDL), a copy of it is provided in the "COPYING.CDDL" file included +; in the VirtualBox 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. +; +; SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0 +; + +%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 +; @param cbMax gcc: rdx msc: r8 x86:[esp+12] wcall: ebx +RT_NOCRT_BEGINPROC strncpy + ; input +%ifdef RT_ARCH_AMD64 + %ifdef ASM_CALL64_MSC + %define pszDst rcx + %define pszSrc rdx + %define cbMax r8 + %else + %define pszDst rdi + %define pszSrc rsi + %define cbMax rdx + %endif + mov r9, pszDst +%else + %ifdef ASM_CALL32_WATCOM + mov ecx, eax + %define pszDst ecx + %define pszSrc edx + %define cbMax ebx + %else + mov ecx, [esp + 4] + mov edx, [esp + 8] + push ebx + mov ebx, [esp + 12 + 4] + %define pszDst ecx + %define pszSrc edx + %define cbMax ebx + %endif + push pszDst +%endif + + ; + ; The rolled out loop. + ; +.next: + cmp cbMax, 4 + jb .simple_intro + + 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 + sub cbMax, 4 + jmp .next + + ; + ; Char by char. + ; +.simple_intro: + test cbMax, cbMax + jz .done + +.simple_next: + mov al, [pszSrc] + mov [pszDst], al + test al, al + jz .done + + dec cbMax + jz .done + + inc pszSrc + inc pszDst + jmp .simple_next + +.done: +%ifdef RT_ARCH_AMD64 + mov rax, r9 +%else + %ifndef ASM_CALL32_WATCOM + pop ebx + %endif + pop eax +%endif + ret +ENDPROC RT_NOCRT(strncpy) + -- cgit v1.2.3