Mercurial > hg > graal-jvmci-8
view src/cpu/x86/vm/assembler_x86_32.inline.hpp @ 222:2a1a77d3458f
6718676: putback for 6604014 is incomplete
Reviewed-by: kvn, jrose
author | never |
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date | Tue, 24 Jun 2008 16:00:14 -0700 |
parents | a61af66fc99e |
children |
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/* * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved. * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. * * This code is free software; you can redistribute it and/or modify it * under the terms of the GNU General Public License version 2 only, as * published by the Free Software Foundation. * * This code is distributed in the hope that it will be useful, but WITHOUT * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License * version 2 for more details (a copy is included in the LICENSE file that * accompanied this code). * * You should have received a copy of the GNU General Public License version * 2 along with this work; if not, write to the Free Software Foundation, * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, * CA 95054 USA or visit www.sun.com if you need additional information or * have any questions. * */ inline void MacroAssembler::pd_patch_instruction(address branch, address target) { unsigned char op = branch[0]; assert(op == 0xE8 /* call */ || op == 0xE9 /* jmp */ || op == 0xEB /* short jmp */ || (op & 0xF0) == 0x70 /* short jcc */ || op == 0x0F && (branch[1] & 0xF0) == 0x80 /* jcc */, "Invalid opcode at patch point"); if (op == 0xEB || (op & 0xF0) == 0x70) { // short offset operators (jmp and jcc) char* disp = (char*) &branch[1]; int imm8 = target - (address) &disp[1]; guarantee(this->is8bit(imm8), "Short forward jump exceeds 8-bit offset"); *disp = imm8; } else { int* disp = (int*) &branch[(op == 0x0F)? 2: 1]; int imm32 = target - (address) &disp[1]; *disp = imm32; } } #ifndef PRODUCT inline void MacroAssembler::pd_print_patched_instruction(address branch) { const char* s; unsigned char op = branch[0]; if (op == 0xE8) { s = "call"; } else if (op == 0xE9 || op == 0xEB) { s = "jmp"; } else if ((op & 0xF0) == 0x70) { s = "jcc"; } else if (op == 0x0F) { s = "jcc"; } else { s = "????"; } tty->print("%s (unresolved)", s); } #endif // ndef PRODUCT