headers/libs/libunwind/libunwind-ppc64.h

   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    Copied from libunwind-x86_64.h, modified slightly for building
   8    frysk successfully on ppc64, by Wu Zhou <woodzltc@cn.ibm.com>
   9    Will be replaced when libunwind is ready on ppc64 platform.
  10
  11 This file is part of libunwind.
  12
  13 Permission is hereby granted, free of charge, to any person obtaining
  14 a copy of this software and associated documentation files (the
  15 "Software"), to deal in the Software without restriction, including
  16 without limitation the rights to use, copy, modify, merge, publish,
  17 distribute, sublicense, and/or sell copies of the Software, and to
  18 permit persons to whom the Software is furnished to do so, subject to
  19 the following conditions:
  20
  21 The above copyright notice and this permission notice shall be
  22 included in all copies or substantial portions of the Software.
  23
  24 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  25 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  26 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  27 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  28 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  29 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  30 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
  31
  32 #ifndef LIBUNWIND_H
  33 #define LIBUNWIND_H
  34
  35 #if defined(__cplusplus) || defined(c_plusplus)
  36 extern "C" {
  37 #endif
  38
  39 #include <inttypes.h>
  40 #include <ucontext.h>
  41
  42 #define UNW_TARGET              ppc64
  43 #define UNW_TARGET_PPC64        1
  44
  45 #define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
  46
  47 /*
  48  * This needs to be big enough to accommodate "struct cursor", while
  49  * leaving some slack for future expansion.  Changing this value will
  50  * require recompiling all users of this library.  Stack allocation is
  51  * relatively cheap and unwind-state copying is relatively rare, so we want
  52  * to err on making it rather too big than too small.
  53  *
  54  * To simplify this whole process, we are at least initially taking the
  55  * tack that UNW_PPC64_* map straight across to the .eh_frame column register
  56  * numbers.  These register numbers come from gcc's source in
  57  * gcc/config/rs6000/rs6000.h
  58  *
  59  * UNW_TDEP_CURSOR_LEN is in terms of unw_word_t size.  Since we have 115
  60  * elements in the loc array, each sized 2 * unw_word_t, plus the rest of
  61  * the cursor struct, this puts us at about 2 * 115 + 40 = 270.  Let's
  62  * round that up to 280.
  63  */
  64
  65 #define UNW_TDEP_CURSOR_LEN 280
  66
  67 #if __WORDSIZE==32
  68 typedef uint32_t unw_word_t;
  69 typedef int32_t unw_sword_t;
  70 #else
  71 typedef uint64_t unw_word_t;
  72 typedef int64_t unw_sword_t;
  73 #endif
  74
  75 typedef long double unw_tdep_fpreg_t;
  76
  77 /*
  78  * Vector register (in PowerPC64 used for AltiVec registers)
  79  */
  80 typedef struct {
  81     uint64_t halves[2];
  82 } unw_tdep_vreg_t;
  83
  84 typedef enum
  85   {
  86     UNW_PPC64_R0,
  87     UNW_PPC64_R1, /* called STACK_POINTER in gcc */
  88     UNW_PPC64_R2,
  89     UNW_PPC64_R3,
  90     UNW_PPC64_R4,
  91     UNW_PPC64_R5,
  92     UNW_PPC64_R6,
  93     UNW_PPC64_R7,
  94     UNW_PPC64_R8,
  95     UNW_PPC64_R9,
  96     UNW_PPC64_R10,
  97     UNW_PPC64_R11, /* called STATIC_CHAIN in gcc */
  98     UNW_PPC64_R12,
  99     UNW_PPC64_R13,
 100     UNW_PPC64_R14,
 101     UNW_PPC64_R15,
 102     UNW_PPC64_R16,
 103     UNW_PPC64_R17,
 104     UNW_PPC64_R18,
 105     UNW_PPC64_R19,
 106     UNW_PPC64_R20,
 107     UNW_PPC64_R21,
 108     UNW_PPC64_R22,
 109     UNW_PPC64_R23,
 110     UNW_PPC64_R24,
 111     UNW_PPC64_R25,
 112     UNW_PPC64_R26,
 113     UNW_PPC64_R27,
 114     UNW_PPC64_R28,
 115     UNW_PPC64_R29,
 116     UNW_PPC64_R30,
 117     UNW_PPC64_R31, /* called HARD_FRAME_POINTER in gcc */
 118
 119     UNW_PPC64_F0 = 32,
 120     UNW_PPC64_F1,
 121     UNW_PPC64_F2,
 122     UNW_PPC64_F3,
 123     UNW_PPC64_F4,
 124     UNW_PPC64_F5,
 125     UNW_PPC64_F6,
 126     UNW_PPC64_F7,
 127     UNW_PPC64_F8,
 128     UNW_PPC64_F9,
 129     UNW_PPC64_F10,
 130     UNW_PPC64_F11,
 131     UNW_PPC64_F12,
 132     UNW_PPC64_F13,
 133     UNW_PPC64_F14,
 134     UNW_PPC64_F15,
 135     UNW_PPC64_F16,
 136     UNW_PPC64_F17,
 137     UNW_PPC64_F18,
 138     UNW_PPC64_F19,
 139     UNW_PPC64_F20,
 140     UNW_PPC64_F21,
 141     UNW_PPC64_F22,
 142     UNW_PPC64_F23,
 143     UNW_PPC64_F24,
 144     UNW_PPC64_F25,
 145     UNW_PPC64_F26,
 146     UNW_PPC64_F27,
 147     UNW_PPC64_F28,
 148     UNW_PPC64_F29,
 149     UNW_PPC64_F30,
 150     UNW_PPC64_F31,
 151     /* Note that there doesn't appear to be an .eh_frame register column
 152        for the FPSCR register.  I don't know why this is.  Since .eh_frame
 153        info is what this implementation uses for unwinding, we have no way
 154        to unwind this register, and so we will not expose an FPSCR register
 155        number in the libunwind API.
 156      */
 157
 158     UNW_PPC64_LR = 65,
 159     UNW_PPC64_CTR = 66,
 160     UNW_PPC64_ARG_POINTER = 67,
 161
 162     UNW_PPC64_CR0 = 68,
 163     UNW_PPC64_CR1,
 164     UNW_PPC64_CR2,
 165     UNW_PPC64_CR3,
 166     UNW_PPC64_CR4,
 167     /* CR5 .. CR7 are currently unused */
 168     UNW_PPC64_CR5,
 169     UNW_PPC64_CR6,
 170     UNW_PPC64_CR7,
 171
 172     UNW_PPC64_XER = 76,
 173
 174     UNW_PPC64_V0 = 77,
 175     UNW_PPC64_V1,
 176     UNW_PPC64_V2,
 177     UNW_PPC64_V3,
 178     UNW_PPC64_V4,
 179     UNW_PPC64_V5,
 180     UNW_PPC64_V6,
 181     UNW_PPC64_V7,
 182     UNW_PPC64_V8,
 183     UNW_PPC64_V9,
 184     UNW_PPC64_V10,
 185     UNW_PPC64_V11,
 186     UNW_PPC64_V12,
 187     UNW_PPC64_V13,
 188     UNW_PPC64_V14,
 189     UNW_PPC64_V15,
 190     UNW_PPC64_V16,
 191     UNW_PPC64_V17,
 192     UNW_PPC64_V18,
 193     UNW_PPC64_V19,
 194     UNW_PPC64_V20,
 195     UNW_PPC64_V21,
 196     UNW_PPC64_V22,
 197     UNW_PPC64_V23,
 198     UNW_PPC64_V24,
 199     UNW_PPC64_V25,
 200     UNW_PPC64_V26,
 201     UNW_PPC64_V27,
 202     UNW_PPC64_V28,
 203     UNW_PPC64_V29,
 204     UNW_PPC64_V30,
 205     UNW_PPC64_V31,
 206
 207     UNW_PPC64_VRSAVE = 109,
 208     UNW_PPC64_VSCR = 110,
 209     UNW_PPC64_SPE_ACC = 111,
 210     UNW_PPC64_SPEFSCR = 112,
 211
 212     /* frame info (read-only) */
 213     UNW_PPC64_FRAME_POINTER,
 214     UNW_PPC64_NIP,
 215
 216
 217     UNW_TDEP_LAST_REG = UNW_PPC64_NIP,
 218
 219     UNW_TDEP_IP = UNW_PPC64_NIP,
 220     UNW_TDEP_SP = UNW_PPC64_R1,
 221     UNW_TDEP_EH = UNW_PPC64_R12
 222   }
 223 ppc64_regnum_t;
 224
 225 typedef enum
 226   {
 227     UNW_PPC64_ABI_ELFv1,
 228     UNW_PPC64_ABI_ELFv2
 229   }
 230 ppc64_abi_t;
 231
 232 /*
 233  * According to David Edelsohn, GNU gcc uses R3, R4, R5, and maybe R6 for
 234  * passing parameters to exception handlers.
 235  */
 236
 237 #define UNW_TDEP_NUM_EH_REGS    4
 238
 239 typedef struct unw_tdep_save_loc
 240   {
 241     /* Additional target-dependent info on a save location.  */
 242   }
 243 unw_tdep_save_loc_t;
 244
 245 /* On ppc64, we can directly use ucontext_t as the unwind context.  */
 246 typedef ucontext_t unw_tdep_context_t;
 247
 248 /* XXX this is not ideal: an application should not be prevented from
 249    using the "getcontext" name just because it's using libunwind.  We
 250    can't just use __getcontext() either, because that isn't exported
 251    by glibc...  */
 252 #define unw_tdep_getcontext(uc)         (getcontext (uc), 0)
 253
 254 #include "libunwind-dynamic.h"
 255
 256 typedef struct
 257   {
 258     /* no ppc64-specific auxiliary proc-info */
 259   }
 260 unw_tdep_proc_info_t;
 261
 262 #include "libunwind-common.h"
 263
 264 #define unw_tdep_is_fpreg               UNW_ARCH_OBJ(is_fpreg)
 265 extern int unw_tdep_is_fpreg (int);
 266
 267 #if defined(__cplusplus) || defined(c_plusplus)
 268 }
 269 #endif
 270
 271 #endif /* LIBUNWIND_H */