src/libs/libunwind/ppc64/Gregs.c

   1 /* libunwind - a platform-independent unwind library
   2    Copyright (C) 2006-2007 IBM
   3    Contributed by
   4      Corey Ashford <cjashfor@us.ibm.com>
   5      Jose Flavio Aguilar Paulino <jflavio@br.ibm.com> <joseflavio@gmail.com>
   6
   7 This file is part of libunwind.
   8
   9 Permission is hereby granted, free of charge, to any person obtaining
  10 a copy of this software and associated documentation files (the
  11 "Software"), to deal in the Software without restriction, including
  12 without limitation the rights to use, copy, modify, merge, publish,
  13 distribute, sublicense, and/or sell copies of the Software, and to
  14 permit persons to whom the Software is furnished to do so, subject to
  15 the following conditions:
  16
  17 The above copyright notice and this permission notice shall be
  18 included in all copies or substantial portions of the Software.
  19
  20 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  21 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  22 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  23 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  24 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  25 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  26 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
  27
  28 #include "unwind_i.h"
  29
  30 HIDDEN int
  31 tdep_access_reg (struct cursor *c, unw_regnum_t reg, unw_word_t *valp,
  32                  int write)
  33 {
  34   struct dwarf_loc loc;
  35
  36   switch (reg)
  37     {
  38     case UNW_PPC64_R0:
  39     case UNW_PPC64_R2:
  40     case UNW_PPC64_R3:
  41     case UNW_PPC64_R4:
  42     case UNW_PPC64_R5:
  43     case UNW_PPC64_R6:
  44     case UNW_PPC64_R7:
  45     case UNW_PPC64_R8:
  46     case UNW_PPC64_R9:
  47     case UNW_PPC64_R10:
  48     case UNW_PPC64_R11:
  49     case UNW_PPC64_R12:
  50     case UNW_PPC64_R13:
  51     case UNW_PPC64_R14:
  52     case UNW_PPC64_R15:
  53     case UNW_PPC64_R16:
  54     case UNW_PPC64_R17:
  55     case UNW_PPC64_R18:
  56     case UNW_PPC64_R19:
  57     case UNW_PPC64_R20:
  58     case UNW_PPC64_R21:
  59     case UNW_PPC64_R22:
  60     case UNW_PPC64_R23:
  61     case UNW_PPC64_R24:
  62     case UNW_PPC64_R25:
  63     case UNW_PPC64_R26:
  64     case UNW_PPC64_R27:
  65     case UNW_PPC64_R28:
  66     case UNW_PPC64_R29:
  67     case UNW_PPC64_R30:
  68     case UNW_PPC64_R31:
  69     case UNW_PPC64_LR:
  70     case UNW_PPC64_CTR:
  71     case UNW_PPC64_CR0:
  72     case UNW_PPC64_CR1:
  73     case UNW_PPC64_CR2:
  74     case UNW_PPC64_CR3:
  75     case UNW_PPC64_CR4:
  76     case UNW_PPC64_CR5:
  77     case UNW_PPC64_CR6:
  78     case UNW_PPC64_CR7:
  79     case UNW_PPC64_VRSAVE:
  80     case UNW_PPC64_VSCR:
  81     case UNW_PPC64_SPE_ACC:
  82     case UNW_PPC64_SPEFSCR:
  83       loc = c->dwarf.loc[reg];
  84       break;
  85
  86     case UNW_TDEP_IP:
  87       if (write)
  88         {
  89           c->dwarf.ip = *valp;  /* update the IP cache */
  90           if (c->dwarf.pi_valid && (*valp < c->dwarf.pi.start_ip
  91                                     || *valp >= c->dwarf.pi.end_ip))
  92             c->dwarf.pi_valid = 0;      /* new IP outside of current proc */
  93         }
  94       else
  95         *valp = c->dwarf.ip;
  96       return 0;
  97
  98     case UNW_TDEP_SP:
  99       if (write)
 100         return -UNW_EREADONLYREG;
 101       *valp = c->dwarf.cfa;
 102       return 0;
 103
 104     default:
 105       return -UNW_EBADREG;
 106       break;
 107     }
 108
 109   if (write)
 110     return dwarf_put (&c->dwarf, loc, *valp);
 111   else
 112     return dwarf_get (&c->dwarf, loc, valp);
 113 }
 114
 115 HIDDEN int
 116 tdep_access_fpreg (struct cursor *c, unw_regnum_t reg, unw_fpreg_t *valp,
 117                    int write)
 118 {
 119   struct dwarf_loc loc;
 120
 121   if ((unsigned) (reg - UNW_PPC64_F0) < 32)
 122   {
 123     loc = c->dwarf.loc[reg];
 124     if (write)
 125       return dwarf_putfp (&c->dwarf, loc, *valp);
 126     else
 127       return dwarf_getfp (&c->dwarf, loc, valp);
 128   }
 129   else
 130   if ((unsigned) (reg - UNW_PPC64_V0) < 32)
 131   {
 132     loc = c->dwarf.loc[reg];
 133     if (write)
 134       return dwarf_putvr (&c->dwarf, loc, *valp);
 135     else
 136       return dwarf_getvr (&c->dwarf, loc, valp);
 137   }
 138
 139   return -UNW_EBADREG;
 140 }
 141