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      1 
      2 /*---------------------------------------------------------------*/
      3 /*--- begin                                   libvex_emnote.h ---*/
      4 /*---------------------------------------------------------------*/
      5 
      6 /*
      7    This file is part of Valgrind, a dynamic binary instrumentation
      8    framework.
      9 
     10    Copyright (C) 2004-2013 OpenWorks LLP
     11       info (at) open-works.net
     12 
     13    This program is free software; you can redistribute it and/or
     14    modify it under the terms of the GNU General Public License as
     15    published by the Free Software Foundation; either version 2 of the
     16    License, or (at your option) any later version.
     17 
     18    This program is distributed in the hope that it will be useful, but
     19    WITHOUT ANY WARRANTY; without even the implied warranty of
     20    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
     21    General Public License for more details.
     22 
     23    You should have received a copy of the GNU General Public License
     24    along with this program; if not, write to the Free Software
     25    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
     26    02110-1301, USA.
     27 
     28    The GNU General Public License is contained in the file COPYING.
     29 
     30    Neither the names of the U.S. Department of Energy nor the
     31    University of California nor the names of its contributors may be
     32    used to endorse or promote products derived from this software
     33    without prior written permission.
     34 */
     35 
     36 #ifndef __LIBVEX_EMNOTE_H
     37 #define __LIBVEX_EMNOTE_H
     38 
     39 #include "libvex_basictypes.h"
     40 
     41 /* VEX can sometimes generate code which returns to the dispatcher
     42    with the guest state pointer set to VEX_TRC_JMP_EMWARN or
     43    VEX_TRC_JMP_EMFAIL.  This means that VEX is trying to tell Valgrind
     44    something noteworthy about emulation progress. For example, that Valgrind
     45    is doing imprecise emulation in some sense.  The guest's pseudo-register
     46    "guest_EMNOTE" will hold a value of type VexEmNote, which describes
     47    the nature of the warning.  Currently the limitations that are
     48    warned about apply primarily to floating point support.
     49 
     50    All guest states must have a 32-bit (UInt) guest_EMNOTE pseudo-
     51    register, that emulation warnings can be written in to.
     52 
     53    Note that guest_EMNOTE only carries a valid value at the jump
     54    marked as VEX_TRC_JMP_EMWARN / VEX_TRC_JMP_EMFAIL.  You can't assume
     55    it will continue to carry a valid value from any amount of time after
     56    the jump.
     57 */
     58 
     59 typedef
     60    enum {
     61       /* no note indicated */
     62       EmNote_NONE=0,
     63 
     64       /* unmasking x87 FP exceptions is not supported */
     65       EmWarn_X86_x87exns,
     66 
     67       /* change of x87 FP precision away from 64-bit (mantissa) */
     68       EmWarn_X86_x87precision,
     69 
     70       /* unmasking SSE FP exceptions is not supported */
     71       EmWarn_X86_sseExns,
     72 
     73       /* setting mxcsr.fz is not supported */
     74       EmWarn_X86_fz,
     75 
     76       /* setting mxcsr.daz is not supported */
     77       EmWarn_X86_daz,
     78 
     79       /* settings to %eflags.ac (alignment check) are noted but ignored */
     80       EmWarn_X86_acFlag,
     81 
     82       /* unmasking PPC32/64 FP exceptions is not supported */
     83       EmWarn_PPCexns,
     84 
     85       /* overflow/underflow of the PPC64 _REDIR stack (ppc64 only) */
     86       EmWarn_PPC64_redir_overflow,
     87       EmWarn_PPC64_redir_underflow,
     88 
     89       /* insn specifies a rounding mode other than "according to FPC"
     90          which requires the floating point extension facility. But that
     91          facility is not available on this host */
     92       EmWarn_S390X_fpext_rounding,
     93 
     94       /* insn (e.g. srnmb) specifies an invalid rounding mode */
     95       EmWarn_S390X_invalid_rounding,
     96 
     97       /* stfle insn is not supported on this host */
     98       EmFail_S390X_stfle,
     99 
    100       /* stckf insn is not supported on this host */
    101       EmFail_S390X_stckf,
    102 
    103       /* ecag insn is not supported on this host */
    104       EmFail_S390X_ecag,
    105 
    106       /* insn needs floating point extension facility which is not
    107          available on this host */
    108       EmFail_S390X_fpext,
    109 
    110       /* GPR 0 contains invalid rounding mode for PFPO instruction */
    111       EmFail_S390X_invalid_PFPO_rounding_mode,
    112 
    113       /* The function code specified in GPR 0 executed by PFPO
    114          instruction is invalid */
    115       EmFail_S390X_invalid_PFPO_function,
    116 
    117       EmNote_NUMBER
    118    }
    119    VexEmNote;
    120 
    121 
    122 /* Produces a short string describing the warning. */
    123 extern const HChar* LibVEX_EmNote_string ( VexEmNote );
    124 
    125 
    126 #endif /* ndef __LIBVEX_EMNOTE_H */
    127 
    128 /*---------------------------------------------------------------*/
    129 /*---                                         libvex_emnote.h ---*/
    130 /*---------------------------------------------------------------*/
    131