Mercurial > jdk8-mips64-public > hotspot / annotate
src/cpu/x86/vm/assembler_x86_32.inline.hpp@b130b98db9cf (annotated)
src/cpu/x86/vm/assembler_x86_32.inline.hpp
Wed, 23 Apr 2008 11:20:36 -0700
- author
- kvn
- date
- Wed, 23 Apr 2008 11:20:36 -0700
- changeset 559
- b130b98db9cf
- parent 435
- a61af66fc99e
- permissions
- -rw-r--r--
6689060: Escape Analysis does not work with Compressed Oops
Summary: 64-bits VM crashes with -XX:+AggresiveOpts (Escape Analysis + Compressed Oops)
Reviewed-by: never, sgoldman
| duke@435 | 1 | /* |
| duke@435 | 2 | * Copyright 1997-2005 Sun Microsystems, Inc. All Rights Reserved. |
| duke@435 | 3 | * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| duke@435 | 4 | * |
| duke@435 | 5 | * This code is free software; you can redistribute it and/or modify it |
| duke@435 | 6 | * under the terms of the GNU General Public License version 2 only, as |
| duke@435 | 7 | * published by the Free Software Foundation. |
| duke@435 | 8 | * |
| duke@435 | 9 | * This code is distributed in the hope that it will be useful, but WITHOUT |
| duke@435 | 10 | * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| duke@435 | 11 | * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| duke@435 | 12 | * version 2 for more details (a copy is included in the LICENSE file that |
| duke@435 | 13 | * accompanied this code). |
| duke@435 | 14 | * |
| duke@435 | 15 | * You should have received a copy of the GNU General Public License version |
| duke@435 | 16 | * 2 along with this work; if not, write to the Free Software Foundation, |
| duke@435 | 17 | * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| duke@435 | 18 | * |
| duke@435 | 19 | * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, |
| duke@435 | 20 | * CA 95054 USA or visit www.sun.com if you need additional information or |
| duke@435 | 21 | * have any questions. |
| duke@435 | 22 | * |
| duke@435 | 23 | */ |
| duke@435 | 24 | |
| duke@435 | 25 | inline void MacroAssembler::pd_patch_instruction(address branch, address target) { |
| duke@435 | 26 | unsigned char op = branch[0]; |
| duke@435 | 27 | assert(op == 0xE8 /* call */ || |
| duke@435 | 28 | op == 0xE9 /* jmp */ || |
| duke@435 | 29 | op == 0xEB /* short jmp */ || |
| duke@435 | 30 | (op & 0xF0) == 0x70 /* short jcc */ || |
| duke@435 | 31 | op == 0x0F && (branch[1] & 0xF0) == 0x80 /* jcc */, |
| duke@435 | 32 | "Invalid opcode at patch point"); |
| duke@435 | 33 | |
| duke@435 | 34 | if (op == 0xEB || (op & 0xF0) == 0x70) { |
| duke@435 | 35 | // short offset operators (jmp and jcc) |
| duke@435 | 36 | char* disp = (char*) &branch[1]; |
| duke@435 | 37 | int imm8 = target - (address) &disp[1]; |
| duke@435 | 38 | guarantee(this->is8bit(imm8), "Short forward jump exceeds 8-bit offset"); |
| duke@435 | 39 | *disp = imm8; |
| duke@435 | 40 | } else { |
| duke@435 | 41 | int* disp = (int*) &branch[(op == 0x0F)? 2: 1]; |
| duke@435 | 42 | int imm32 = target - (address) &disp[1]; |
| duke@435 | 43 | *disp = imm32; |
| duke@435 | 44 | } |
| duke@435 | 45 | } |
| duke@435 | 46 | |
| duke@435 | 47 | #ifndef PRODUCT |
| duke@435 | 48 | inline void MacroAssembler::pd_print_patched_instruction(address branch) { |
| duke@435 | 49 | const char* s; |
| duke@435 | 50 | unsigned char op = branch[0]; |
| duke@435 | 51 | if (op == 0xE8) { |
| duke@435 | 52 | s = "call"; |
| duke@435 | 53 | } else if (op == 0xE9 || op == 0xEB) { |
| duke@435 | 54 | s = "jmp"; |
| duke@435 | 55 | } else if ((op & 0xF0) == 0x70) { |
| duke@435 | 56 | s = "jcc"; |
| duke@435 | 57 | } else if (op == 0x0F) { |
| duke@435 | 58 | s = "jcc"; |
| duke@435 | 59 | } else { |
| duke@435 | 60 | s = "????"; |
| duke@435 | 61 | } |
| duke@435 | 62 | tty->print("%s (unresolved)", s); |
| duke@435 | 63 | } |
| duke@435 | 64 | #endif // ndef PRODUCT |
