| /* ********************************************************** |
| * Copyright (c) 2000-2008 VMware, Inc. All rights reserved. |
| * **********************************************************/ |
| |
| /* |
| * Redistribution and use in source and binary forms, with or without |
| * modification, are permitted provided that the following conditions are met: |
| * |
| * * Redistributions of source code must retain the above copyright notice, |
| * this list of conditions and the following disclaimer. |
| * |
| * * Redistributions in binary form must reproduce the above copyright notice, |
| * this list of conditions and the following disclaimer in the documentation |
| * and/or other materials provided with the distribution. |
| * |
| * * Neither the name of VMware, Inc. nor the names of its contributors may be |
| * used to endorse or promote products derived from this software without |
| * specific prior written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" |
| * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE |
| * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL VMWARE, INC. OR CONTRIBUTORS BE LIABLE |
| * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL |
| * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR |
| * SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT |
| * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY |
| * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH |
| * DAMAGE. |
| */ |
| |
| /* Copyright (c) 2003-2007 Determina Corp. */ |
| /* Copyright (c) 2001-2003 Massachusetts Institute of Technology */ |
| /* Copyright (c) 2000-2001 Hewlett-Packard Company */ |
| |
| /* file "x86/steal_reg.h" */ |
| |
| #ifndef X86_STEAL_REG_H |
| #define X86_STEAL_REG_H |
| |
| /* This header file declares the tables and functions that help decode |
| x86 instructions so that we can steal edi for our own uses. */ |
| |
| void steal_reg(dcontext_t *dcontext, instr_t *instr, instrlist_t *ilist); |
| void restore_state(dcontext_t *dcontext, instr_t *instr, instrlist_t *ilist); |
| |
| /* We use the instrlist_t flags field to signify when the application's |
| * value in ebx is in dcontext and ebx actually contains the |
| * application's edi value (true when bit 0 of flags is asserted). As |
| * you can see in the .c file, we're pretty conservative with this |
| * optimization. We're really only concerned with the stretches where |
| * edi is involved in a calculation. As such, whenever an instruction |
| * doesn't use edi, we place dcontext->xbx back in ebx. We also keep |
| * track of when the edi value in ebx matches dcontext->xdi (true when |
| * bit 1 of flags is asserted) so that we don't have to dump ebx into |
| * dcontext->xdi unnecessarily. */ |
| #define EDI_VAL_IN_MEM 0 |
| #define EDI_VAL_IN_EBX 1 |
| #define EDI_VAL_IN_EBX_AND_MEM 3 |
| |
| #endif /* X86_STEAL_REG_H */ |
