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// i386.cc -- i386 target support for gold.
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// i386.cc -- i386 target support for gold.
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// Copyright 2006, 2007, 2008, 2009, 2010, 2011 Free Software Foundation, Inc.
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// Copyright 2006, 2007, 2008, 2009, 2010, 2011, 2012
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// Free Software Foundation, Inc.
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// Written by Ian Lance Taylor <iant@google.com>.
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// Written by Ian Lance Taylor <iant@google.com>.
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// This file is part of gold.
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// This file is part of gold.
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// This program is free software; you can redistribute it and/or modify
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// This program is free software; you can redistribute it and/or modify
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// Build a jmp instruction to skip over the bytes.
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// Build a jmp instruction to skip over the bytes.
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unsigned char jmp[5];
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unsigned char jmp[5];
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jmp[0] = 0xe9;
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jmp[0] = 0xe9;
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elfcpp::Swap_unaligned<32, false>::writeval(jmp + 1, length - 5);
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elfcpp::Swap_unaligned<32, false>::writeval(jmp + 1, length - 5);
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return (std::string(reinterpret_cast<char*>(&jmp[0]), 5)
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return (std::string(reinterpret_cast<char*>(&jmp[0]), 5)
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+ std::string(length - 5, '\0'));
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+ std::string(length - 5, static_cast<char>(0x90)));
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}
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}
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// Nop sequences of various lengths.
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// Nop sequences of various lengths.
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const char nop1[1] = { 0x90 }; // nop
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const char nop1[1] = { '\x90' }; // nop
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const char nop2[2] = { 0x66, 0x90 }; // xchg %ax %ax
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const char nop2[2] = { '\x66', '\x90' }; // xchg %ax %ax
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const char nop3[3] = { 0x8d, 0x76, 0x00 }; // leal 0(%esi),%esi
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const char nop3[3] = { '\x8d', '\x76', '\x00' }; // leal 0(%esi),%esi
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const char nop4[4] = { 0x8d, 0x74, 0x26, 0x00}; // leal 0(%esi,1),%esi
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const char nop4[4] = { '\x8d', '\x74', '\x26', // leal 0(%esi,1),%esi
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const char nop5[5] = { 0x90, 0x8d, 0x74, 0x26, // nop
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'\x00'};
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0x00 }; // leal 0(%esi,1),%esi
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const char nop5[5] = { '\x90', '\x8d', '\x74', // nop
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const char nop6[6] = { 0x8d, 0xb6, 0x00, 0x00, // leal 0L(%esi),%esi
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'\x26', '\x00' }; // leal 0(%esi,1),%esi
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0x00, 0x00 };
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const char nop6[6] = { '\x8d', '\xb6', '\x00', // leal 0L(%esi),%esi
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const char nop7[7] = { 0x8d, 0xb4, 0x26, 0x00, // leal 0L(%esi,1),%esi
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'\x00', '\x00', '\x00' };
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0x00, 0x00, 0x00 };
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const char nop7[7] = { '\x8d', '\xb4', '\x26', // leal 0L(%esi,1),%esi
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const char nop8[8] = { 0x90, 0x8d, 0xb4, 0x26, // nop
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'\x00', '\x00', '\x00',
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0x00, 0x00, 0x00, 0x00 }; // leal 0L(%esi,1),%esi
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'\x00' };
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const char nop9[9] = { 0x89, 0xf6, 0x8d, 0xbc, // movl %esi,%esi
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const char nop8[8] = { '\x90', '\x8d', '\xb4', // nop
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0x27, 0x00, 0x00, 0x00, // leal 0L(%edi,1),%edi
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'\x26', '\x00', '\x00', // leal 0L(%esi,1),%esi
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0x00 };
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'\x00', '\x00' };
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const char nop10[10] = { 0x8d, 0x76, 0x00, 0x8d, // leal 0(%esi),%esi
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const char nop9[9] = { '\x89', '\xf6', '\x8d', // movl %esi,%esi
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0xbc, 0x27, 0x00, 0x00, // leal 0L(%edi,1),%edi
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'\xbc', '\x27', '\x00', // leal 0L(%edi,1),%edi
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0x00, 0x00 };
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'\x00', '\x00', '\x00' };
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const char nop11[11] = { 0x8d, 0x74, 0x26, 0x00, // leal 0(%esi,1),%esi
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const char nop10[10] = { '\x8d', '\x76', '\x00', // leal 0(%esi),%esi
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0x8d, 0xbc, 0x27, 0x00, // leal 0L(%edi,1),%edi
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'\x8d', '\xbc', '\x27', // leal 0L(%edi,1),%edi
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0x00, 0x00, 0x00 };
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'\x00', '\x00', '\x00',
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const char nop12[12] = { 0x8d, 0xb6, 0x00, 0x00, // leal 0L(%esi),%esi
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'\x00' };
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0x00, 0x00, 0x8d, 0xbf, // leal 0L(%edi),%edi
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const char nop11[11] = { '\x8d', '\x74', '\x26', // leal 0(%esi,1),%esi
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0x00, 0x00, 0x00, 0x00 };
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'\x00', '\x8d', '\xbc', // leal 0L(%edi,1),%edi
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const char nop13[13] = { 0x8d, 0xb6, 0x00, 0x00, // leal 0L(%esi),%esi
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'\x27', '\x00', '\x00',
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0x00, 0x00, 0x8d, 0xbc, // leal 0L(%edi,1),%edi
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'\x00', '\x00' };
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0x27, 0x00, 0x00, 0x00,
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const char nop12[12] = { '\x8d', '\xb6', '\x00', // leal 0L(%esi),%esi
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0x00 };
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'\x00', '\x00', '\x00', // leal 0L(%edi),%edi
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const char nop14[14] = { 0x8d, 0xb4, 0x26, 0x00, // leal 0L(%esi,1),%esi
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'\x8d', '\xbf', '\x00',
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0x00, 0x00, 0x00, 0x8d, // leal 0L(%edi,1),%edi
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'\x00', '\x00', '\x00' };
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0xbc, 0x27, 0x00, 0x00,
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const char nop13[13] = { '\x8d', '\xb6', '\x00', // leal 0L(%esi),%esi
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0x00, 0x00 };
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'\x00', '\x00', '\x00', // leal 0L(%edi,1),%edi
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const char nop15[15] = { 0xeb, 0x0d, 0x90, 0x90, // jmp .+15
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'\x8d', '\xbc', '\x27',
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0x90, 0x90, 0x90, 0x90, // nop,nop,nop,...
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'\x00', '\x00', '\x00',
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0x90, 0x90, 0x90, 0x90,
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'\x00' };
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0x90, 0x90, 0x90 };
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const char nop14[14] = { '\x8d', '\xb4', '\x26', // leal 0L(%esi,1),%esi
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'\x00', '\x00', '\x00', // leal 0L(%edi,1),%edi
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'\x00', '\x8d', '\xbc',
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'\x27', '\x00', '\x00',
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'\x00', '\x00' };
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const char nop15[15] = { '\xeb', '\x0d', '\x90', // jmp .+15
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'\x90', '\x90', '\x90', // nop,nop,nop,...
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'\x90', '\x90', '\x90',
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'\x90', '\x90', '\x90',
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'\x90', '\x90', '\x90' };
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const char* nops[16] = {
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const char* nops[16] = {
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NULL,
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NULL,
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nop1, nop2, nop3, nop4, nop5, nop6, nop7,
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nop1, nop2, nop3, nop4, nop5, nop6, nop7,
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nop8, nop9, nop10, nop11, nop12, nop13, nop14, nop15
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nop8, nop9, nop10, nop11, nop12, nop13, nop14, nop15
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