92 lines
2.1 KiB
ArmAsm
92 lines
2.1 KiB
ArmAsm
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/*
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* Copyright (c) 2011 Aeroflex Gaisler
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*
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* BSD license:
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL
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* THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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.text
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.global _start, main, _end
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_start:
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#ifndef _FLAT
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save %sp, -64, %sp
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#else
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add %sp, -72, %sp
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st %o7, [%sp+64]
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#endif
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/* clear the bss */
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sethi %hi(__bss_start),%g2
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or %g2,%lo(__bss_start),%g2 ! g2 = start of bss
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sethi %hi(_end),%g3
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or %g3,%lo(_end),%g3 ! g3 = end of bss
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mov %g0,%g1 ! so std has two zeros
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sub %g3, %g2, %g3
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zerobss:
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subcc %g3, 8, %g3
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bge,a zerobss
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std %g0,[%g2+%g3]
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set _end, %o0
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st %g0,[%o0]
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call bdinit2
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nop
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call prelibchook
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nop
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call _call_initcalls /* atexit uses __atexit lock */
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nop
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set _fini, %o0
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call atexit, 1
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nop
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call _init
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nop
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call main
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nop
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call _exit
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nop
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#ifndef _FLAT
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ret
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restore
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#else
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ld [%sp+64], %o7
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retl
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add %sp, 72, %sp
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#endif
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.seg "data"
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.global .bdata
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.bdata:
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.align 8
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.global _environ
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_environ:
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.word 1
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