f811485ffb
Many of the MSP430 crt functions (e.g. to initialize bss) are linked
"dynamically", based on symbols defined in the program.
The GNU assembler defines the symbols corresponding to the crt
functions by examining the section names in the input file.
If GCC has been configured with --enable-initfini-array, then
.init_array and .fini_array will hold pointers to global
constructors/destructors. These sections can also hold functions that
need to be executed for other purposes.
The attached patch puts the __crt0_run_{preinit,init,fini}_array and
__crt0_run_array functions in their own object files, so they will
only be linked when needed.
Successfully regtested the DejaGNU GCC testsuite using the binutils and
newlib changes together with GCC trunk configured with
--enable-initfini-array.
42 lines
1.2 KiB
ArmAsm
42 lines
1.2 KiB
ArmAsm
/* Copyright (c) 2013 Red Hat, Inc. All rights reserved.
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This copyrighted material is made available to anyone wishing to use, modify,
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copy, or redistribute it subject to the terms and conditions of the BSD
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License. This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY expressed or implied, including the implied warranties
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of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. A copy of this license
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is available at http://www.opensource.org/licenses. Any Red Hat trademarks that
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are incorporated in the source code or documentation are not subject to the BSD
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License and may only be used or replicated with the express permission of
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Red Hat, Inc.
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*/
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#include "memmodel.h"
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#ifndef MINRT
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.section .init,"ax"
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call_ #__crt0_run_preinit_array
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call_ #__crt0_run_init_array
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ret_
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.global __msp430_init_end
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__msp430_init_end:
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.section .fini,"ax"
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ret_
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.global __msp430_fini_end
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__msp430_fini_end:
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.text
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;; If these functions are not defined externally, we don't need them to do
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;; anything.
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.balign 2
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.weak __crt0_run_preinit_array
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.weak __crt0_run_init_array
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__crt0_run_preinit_array:
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__crt0_run_init_array:
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ret_
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#endif
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