f86d57bfe3
l_lx_elfppc32.S l_lx_elfppc32.h ppc_d_nrv2e.S ppc_d_nrv2b.S committer: jreiser <jreiser> 1109217478 +0000
97 lines
2.8 KiB
ArmAsm
97 lines
2.8 KiB
ArmAsm
/* l_lx_elfppc.S -- Linux program entry point & decompressor (Elf binary)
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*
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* This file is part of the UPX executable compressor.
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*
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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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*
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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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*
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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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*
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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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*
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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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*
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* John F. Reiser
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* <jreiser@users.sourceforge.net>
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*/
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#include "ppc_regs.h"
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/*__MACOS000__*/
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_start: .globl _start
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call main # must be exactly 1 instruction; link_register= &decompress
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#include "ppc_d_nrv2e.S"
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sz_b_info= 12
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sz_unc= 0
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sz_cpr= 4
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b_method= 8
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PROT_READ= 1
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PROT_WRITE= 2
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PROT_EXEC= 4
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MAP_PRIVATE= 2
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MAP_FIXED= 0x10
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MAP_ANONYMOUS= 0x20
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SYS_mmap= 90
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PAGE_SHIFT= 12
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PAGE_SIZE = -(~0<<PAGE_SHIFT)
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/* Decompress the rest of this loader, and jump to it. */
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unfold:
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mflr r30 # &{ b_info={sz_unc, sz_cpr, {4 char}}, folded_loader...}
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li a5,0 # off_t
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li a4,0 # fd; ignored, but must be in range?
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lwz a0,sz_cpr(r30)
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li a3,MAP_PRIVATE | MAP_FIXED | MAP_ANONYMOUS
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li a2,PROT_READ | PROT_WRITE | PROT_EXEC
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li a1,PAGE_SIZE
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add a0,a0,r30
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li 0,SYS_mmap
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addi a0,a0,sz_b_info+PAGE_SIZE-1
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rlwinm a0,a0,0,0,31-PAGE_SHIFT # next page boundary after fold
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sc
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bns+ 0f; trap # Branch if NoSummary[Overflow] (no failure)
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0:
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mtctr r31
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lbz meth,b_method(r30)
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la ldst,31*4(sp) # &do_not_care
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mr dst,a0
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mtlr a0 # &continuation
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lwz lsrc,sz_cpr(r30)
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addi src,r30,sz_b_info
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bctr # goto decomrpess; return to link register (mmap'ed page)
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main:
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stwu r1,-32*4(sp) # allocate space (keeping 0 mod 16), save r1
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stmw r2,4(sp) # save registers r2 thru r31
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mflr r31 # &decompress
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call unfold
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/* { b_info={sz_unc, sz_cpr, {4 char}}, folded_loader...} */
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eof:
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/*__XTHEENDX__*/
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/*
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vi:ts=8:et:nowrap
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*/
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