71 lines
2.5 KiB
ArmAsm
71 lines
2.5 KiB
ArmAsm
/* $NetBSD: crt0.S,v 1.1 2012/08/13 02:49:04 matt Exp $ */
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/*-
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* Copyright (c) 2012 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Matt Thomas of 3am Software Foundry.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <arm/asm.h>
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RCSID("$NetBSD: crt0.S,v 1.1 2012/08/13 02:49:04 matt Exp $")
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STRONG_ALIAS(_start,__start)
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_ENTRY(__start)
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#ifdef __minix
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mov r5, r2 /* cleanup */
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mov r4, r1 /* obj_main */
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mov r3, r0 /* ps_strings */
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/* Get argc, argv, and envp from stack */
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ldr r0, [sp, #0x0000]
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add r1, sp, #0x0004
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add r2, r1, r0, lsl #2
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add r2, r2, #0x0004
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#else
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/*
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* We need to swap ps_strings and cleanup
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*/
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mov ip, r0 /* ps_strings -> tmp */
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mov r0, r2 /* cleanup -> ps_strings */
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mov r2, ip /* tmp -> ps_strings */
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#endif /* __minix */
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/* Ensure the stack is properly aligned before calling C code. */
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bic sp, sp, #7
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#ifdef __minix
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/* Store argc and argv on the stack */
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sub sp, sp, #8
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str r5, [sp, #4]
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str r4, [sp, #0]
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#endif
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/*
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* void ___start(void (*cleanup)(void),
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* const Obj_Entry *obj,
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* struct ps_strings *ps_strings);
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*/
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b ___start
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