83 lines
2.7 KiB
C
83 lines
2.7 KiB
C
/*
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* This file is part of the libpayload project.
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*
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* Copyright (C) 2008 Advanced Micro Devices, Inc.
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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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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <libpayload.h>
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/*
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* This structure seeds the stack. We provide the return address of our main
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* function, and further down, the address of the function that we call when
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* we leave and try to restore the original stack. At the very bottom of the
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* stack we store the orignal stack pointer from the calling application.
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*/
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static void start_main(void);
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extern void _leave(void);
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static struct {
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uint32_t eip[2];
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uint32_t raddr[2];
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uint32_t esp;
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} initial_stack __attribute__ ((section(".istack"))) = {
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{ (uint32_t) start_main, 0 },
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{ (uint32_t) _leave, 0 },
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(uint32_t) & initial_stack,
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};
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void *_istack = &initial_stack;
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/**
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* This is our C entry function - set up the system
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* and jump into the payload entry point.
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*/
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static void start_main(void)
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{
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extern int main(void);
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/* Set up the consoles. */
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console_init();
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/* Gather system information. */
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lib_get_sysinfo();
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/*
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* Any other system init that has to happen before the
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* user gets control goes here.
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*/
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/* Go to the entry point. */
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/* In the future we may care about the return value. */
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(void) main();
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/*
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* Returning here will go to the _leave function to return
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* us to the original context.
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*/
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}
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