7b681c5926
According to coreboot’s payload API [1], the called payload should be able to return a value via %eax. Support this by changing the prototype of start_main() and pass on the return value of main() to the caller instead of discarding it. [1] https://www.coreboot.org/Payload_API Change-Id: I8442faea19cc8e04487092f8e61aa4e5cba3ba76 Signed-off-by: Mathias Krause <minipli@googlemail.com> Reviewed-on: https://review.coreboot.org/18334 Tested-by: build bot (Jenkins) Reviewed-by: Paul Menzel <paulepanter@users.sourceforge.net> Reviewed-by: Aaron Durbin <adurbin@chromium.org>
75 lines
2.6 KiB
C
75 lines
2.6 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 <exception.h>
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#include <libpayload.h>
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unsigned long loader_eax; /**< The value of EAX passed from the loader */
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unsigned long loader_ebx; /**< The value of EBX passed from the loader */
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unsigned int main_argc; /**< The argc value to pass to main() */
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/** The argv value to pass to main() */
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char *main_argv[MAX_ARGC_COUNT];
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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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int start_main(void);
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int start_main(void)
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{
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extern int main(int argc, char **argv);
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/* Gather system information. */
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lib_get_sysinfo();
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/* Optionally set up the consoles. */
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#if !IS_ENABLED(CONFIG_LP_SKIP_CONSOLE_INIT)
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console_init();
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#endif
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exception_init();
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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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/*
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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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*/
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/*
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* Returning from main() 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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return main(main_argc, (main_argc != 0) ? main_argv : NULL);
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}
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