2f2a304234
* configure.host (msp430): Add. * libc/include/machine/ieeefp.h: Add MSP430 support. * libc/include/machine/setjmp.h: Likewise. * libc/include/sys/config.h: Likewise. * libc/machine/configure.in (msp430): Add. * libc/machine/configure: Regenerate. * libc/machine/msp430: New directory. [libgloss] * configure.in (msp430*-*-elf): Add. * configure: Regenerate. * msp430: New directory.
107 lines
2.4 KiB
ArmAsm
107 lines
2.4 KiB
ArmAsm
/* Copyright (c) 2012-2013 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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.section ".resetvec", "a"
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__msp430_resetvec_hook:
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.word __start
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.section ".lowtext", "ax", @progbits
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.global __start
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__start:
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mov_ #__stack, R1
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;; Disable watchdog timer.
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MOV #0x5a80, &0x15C
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mov_ #__bssstart, R12
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clr.w R13
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mov.w #__bsssize, R14
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#ifdef __MSP430X_LARGE__
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clr.w R15 ; We assume that __bsssize is never > 64M
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#endif
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call_ #memset
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mov_ #__datastart, R12
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mov_ #__romdatastart, R13
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;; memmove and memcpy do not currently work when src == dst
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cmp_ R12, R13
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jeq 1f
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mov.w #__romdatacopysize, R14
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#ifdef __MSP430X_LARGE__
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clr.w R15 ; We assume that __romdatacopysize is never > 64M
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#endif
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call_ #memmove
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1:
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call_ #__msp430_init
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clr.w R12 ; Set argc == 0
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call_ #main
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call_ #_exit
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.word __msp430_resetvec_hook
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;----------------------------------------
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.global _msp430_run_init_array
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.type _msp430_run_init_array,@function
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_msp430_run_init_array:
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mov_ #__init_array_start, R4
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mov_ #__init_array_end, R5
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mov_ #PTRsz, R6
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br_ #_msp430_run_array
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.global _msp430_run_preinit_array
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.type _msp430_run_preinit_array,@function
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_msp430_run_preinit_array:
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mov_ #__preinit_array_start, R4
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mov_ #__preinit_array_end, R5
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mov_ #PTRsz, R6
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br_ #_msp430_run_array
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.global _msp430_run_fini_array
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.type _msp430_run_fini_array,@function
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_msp430_run_fini_array:
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mov_ #__fini_array_start, R4
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mov_ #__fini_array_end, R5
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mov_ #-PTRsz, R6
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br_ #_msp430_run_array
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_msp430_run_array:
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cmp_ R4, R5
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jeq _msp430_run_done
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mov_ @R4, R7
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add_ R6, R4
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call_ @R7
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br_ _msp430_run_array
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_msp430_run_done:
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ret_
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;----------------------------------------
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.section .init,"ax"
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.global __msp430_init
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__msp430_init:
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.section .fini,"ax"
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.global __msp430_fini
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__msp430_fini:
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call_ #_msp430_run_fini_array
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