192 lines
3.3 KiB
ArmAsm
192 lines
3.3 KiB
ArmAsm
/*
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* Copyright (c) 2003 Marcel Moolenaar
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* All rights reserved.
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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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*
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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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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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.ident "$FreeBSD$"
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.text
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/*
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* void _start(char **ap, struct ps_strings *, void (*cleanup)(void));
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*/
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#define AP in0
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#define CLEANUP in2
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#define GP loc0
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#define ARGC loc1
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#define ARGV loc2
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#define ENVP loc3
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.global _start
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.type _start, @function
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.proc _start
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_start:
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.prologue
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.save rp, r0
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.body
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{ .mlx
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alloc r14=ar.pfs,3,4,3,0
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movl r15=@gprel(1f)
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}
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1:
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{ .mmi
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ld4 ARGC=[AP]
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adds ARGV=8,AP
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mov r16=ip
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;;
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}
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{ .mmi
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sub gp=r16,r15
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sub GP=r16,r15
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shladd r14=ARGC,3,AP
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;;
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}
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{ .mii
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addl r15=@ltoff(environ),gp
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cmp4.ge p6,p7=0,ARGC
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adds ENVP=16,r14
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;;
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}
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{ .mmi
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ld8 r14=[r15]
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(p7) ld8 r15=[ARGV]
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addl r16=@gprel(__progname),gp
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;;
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}
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{ .mib
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st8 [r14]=ENVP
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(p7) cmp.eq p6,p0=0,r15
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(p6) br.dpnt .L1
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;;
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}
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/* Normalize __progname. */
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{ .mmi
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st8 [r16]=r15
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ld1 r14=[r15],1
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nop 0
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;;
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}
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.L0:
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{ .mib
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cmp4.eq p7,p0=0,r14
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cmp4.eq p6,p0=0x2f,r14
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(p7) br.dptk .L1
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;;
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}
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{ .mmb
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(p6) st8 [r16]=r15
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ld1 r14=[r15],1
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br.dptk.many .L0
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}
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.L1:
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{ .mib
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cmp.ne p7,p0=0,CLEANUP
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mov out0=CLEANUP
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(p7) br.call.sptk b0=atexit
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;;
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}
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#ifdef GCRT
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{ .mmi
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mov gp=GP
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;;
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addl r14=@ltoff(@fptr(_mcleanup)),gp
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nop 0
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;;
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}
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{ .mfb
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ld8 out0=[r14]
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nop 0
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br.call.sptk b0=atexit
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;;
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}
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#endif
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{ .mmi
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mov gp=GP
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;;
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addl r14=@ltoff(@fptr(_fini)),gp
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nop 0
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;;
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}
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{ .mfb
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ld8 out0=[r14]
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nop 0
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br.call.sptk b0=atexit
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;;
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}
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#ifdef GCRT
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{ .mmi
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mov gp=GP
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;;
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addl r14=@ltoff(eprol),gp
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addl r15=@ltoff(etext),gp
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;;
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}
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{ .mmb
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ld8 out0=[r14]
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ld8 out1=[r15]
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br.call.sptk b0=monstartup
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;;
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}
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#endif
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{ .mfb
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mov gp=GP
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nop 0
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br.call.sptk b0=_init
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;;
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}
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{ .mmi
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mov gp=GP
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mov out0=ARGC
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mov out1=ARGV
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}
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{ .mfb
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mov out2=ENVP
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nop 0
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br.call.sptk b0=main
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;;
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}
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{ .mib
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mov gp=GP
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mov out0=r8
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br.call.sptk b0=exit
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;;
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}
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.endp _start
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#ifdef GCRT
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eprol:
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#endif
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.rodata
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.empty: stringz ""
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.sdata
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.global __progname
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.size __progname,8
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.type __progname,@object
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__progname: data8 .empty
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.common environ,8,8
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