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https://github.com/upx/upx
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2558243c83
amd_d_nrv2b.S amd_d_nrv2e.S l_lx_elf64amd.S committer: jreiser <jreiser> 1131943590 +0000
82 lines
2.2 KiB
ArmAsm
82 lines
2.2 KiB
ArmAsm
/* amd_d_nrv2e.S -- AMD64 decompressor for NRV2E
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This file is part of the UPX executable compressor.
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Copyright (C) 1996-2004 Markus Franz Xaver Johannes Oberhumer
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Copyright (C) 1996-2004 Laszlo Molnar
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Copyright (C) 2000-2005 John F. Reiser
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All Rights Reserved.
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UPX and the UCL library are free software; you can redistribute them
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and/or modify them under the terms of the GNU General Public License as
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published by the Free Software Foundation; either version 2 of
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the License, or (at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING.
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If not, write to the Free Software Foundation, Inc.,
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59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
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Markus F.X.J. Oberhumer Laszlo Molnar
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<mfx@users.sourceforge.net> <ml1050@users.sourceforge.net>
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John F. Reiser
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<jreiser@users.sourceforge.net>
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*/
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ALIGN(1<<3)
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lit_n2e:
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incq %rsi; movb %dl,(%rdi)
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incq %rdi
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top_n2e:
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movzbl (%rsi),%edx # speculate: literal, or bottom 8 bits of offset
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jnextb1y lit_n2e
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lea 1(lenq),off # [len= 0] off= 1
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jmp getoff_n2e
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off_n2e:
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dec off
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getnextb(off)
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getoff_n2e:
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getnextb(off)
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jnextb0n off_n2e
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subl $ 3,off; jc offprev_n2e
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shll $ 8,off
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orl %edx,off; incq %rsi
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xorl $~0,off; jz eof
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sarl off # Carry= original low bit
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movslq off,disp # XXX: 2GB
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jc lenlast_n2e
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jmp lenmore_n2e
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offprev_n2e:
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jnextb1y lenlast_n2e
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lenmore_n2e:
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incl len # len= 1
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jnextb1y lenlast_n2e
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len_n2e:
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getnextb(len)
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jnextb0n len_n2e
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addl $6-2-2,len
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jmp gotlen_n2e
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lenlast_n2e:
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getnextb(len) # 0,1,2,3
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gotlen_n2e:
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cmpq $-0x500,disp
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adcl $2,len # len += 2+ (disp < -0x500);
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call copy
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bot_n2e: # In: 0==len
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jmp top_n2e
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/*
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vi:ts=8:et:nowrap
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*/
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