headers/libs/libunwind/libunwind-ia64.h

   1 /* libunwind - a platform-independent unwind library
   2    Copyright (C) 2001-2004 Hewlett-Packard Co
   3         Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
   4
   5 This file is part of libunwind.
   6
   7 Permission is hereby granted, free of charge, to any person obtaining
   8 a copy of this software and associated documentation files (the
   9 "Software"), to deal in the Software without restriction, including
  10 without limitation the rights to use, copy, modify, merge, publish,
  11 distribute, sublicense, and/or sell copies of the Software, and to
  12 permit persons to whom the Software is furnished to do so, subject to
  13 the following conditions:
  14
  15 The above copyright notice and this permission notice shall be
  16 included in all copies or substantial portions of the Software.
  17
  18 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  19 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  20 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  21 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  22 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  23 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  24 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
  25
  26 #ifndef LIBUNWIND_H
  27 #define LIBUNWIND_H
  28
  29 #include <inttypes.h>
  30 #include <ucontext.h>
  31
  32 #if defined(__cplusplus) || defined(c_plusplus)
  33 extern "C" {
  34 #endif
  35
  36 #ifdef ia64
  37   /* This works around a bug in Intel's ECC v7.0 which defines "ia64"
  38      as "1".  */
  39 # undef ia64
  40 #endif
  41
  42 #ifdef __hpux
  43   /* On HP-UX, there is no hope of supporting UNW_LOCAL_ONLY, because
  44      it's impossible to obtain the address of the members in the
  45      sigcontext structure.  */
  46 # undef UNW_LOCAL_ONLY
  47 # define UNW_GENERIC_ONLY
  48 #endif
  49
  50 #define UNW_TARGET      ia64
  51 #define UNW_TARGET_IA64 1
  52
  53 #define _U_TDEP_QP_TRUE 0       /* see libunwind-dynamic.h  */
  54
  55 /* This needs to be big enough to accommodate "struct cursor", while
  56    leaving some slack for future expansion.  Changing this value will
  57    require recompiling all users of this library.  Stack allocation is
  58    relatively cheap and unwind-state copying is relatively rare, so we
  59    want to err on making it rather too big than too small.  */
  60 #define UNW_TDEP_CURSOR_LEN     511
  61
  62 /* If this bit is it indicates that the procedure saved all of ar.bsp,
  63    ar.bspstore, and ar.rnat.  If, additionally, ar.bsp != saved ar.bsp,
  64    then this procedure has performed a register-backing-store switch.  */
  65 #define UNW_PI_FLAG_IA64_RBS_SWITCH_BIT (UNW_PI_FLAG_FIRST_TDEP_BIT + 0)
  66
  67 #define UNW_PI_FLAG_IA64_RBS_SWITCH     (1 << UNW_PI_FLAG_IA64_RBS_SWITCH_BIT)
  68
  69 typedef uint64_t unw_word_t;
  70 typedef int64_t unw_sword_t;
  71
  72 /* On IA-64, we want to access the contents of floating-point
  73    registers as a pair of "words", but to ensure 16-byte alignment, we
  74    make it a union that contains a "long double".  This will do the
  75    Right Thing on all known IA-64 platforms, including HP-UX.  */
  76 typedef union
  77   {
  78     struct { unw_word_t bits[2]; } raw;
  79     long double dummy;  /* dummy to force 16-byte alignment */
  80   }
  81 unw_tdep_fpreg_t;
  82
  83 typedef struct
  84   {
  85     /* no ia64-specific auxiliary proc-info */
  86   }
  87 unw_tdep_proc_info_t;
  88
  89 typedef enum
  90   {
  91     /* Note: general registers are excepted to start with index 0.
  92        This convention facilitates architecture-independent
  93        implementation of the C++ exception handling ABI.  See
  94        _Unwind_SetGR() and _Unwind_GetGR() for details.  */
  95     UNW_IA64_GR = 0,                    /* general registers (r0..r127) */
  96      UNW_IA64_GP = UNW_IA64_GR + 1,
  97      UNW_IA64_TP = UNW_IA64_GR + 13,
  98
  99     UNW_IA64_NAT = UNW_IA64_GR + 128,   /* NaT registers (nat0..nat127) */
 100
 101     UNW_IA64_FR = UNW_IA64_NAT + 128,   /* fp registers (f0..f127) */
 102
 103     UNW_IA64_AR = UNW_IA64_FR + 128,    /* application registers (ar0..r127) */
 104      UNW_IA64_AR_RSC = UNW_IA64_AR + 16,
 105      UNW_IA64_AR_BSP = UNW_IA64_AR + 17,
 106      UNW_IA64_AR_BSPSTORE = UNW_IA64_AR + 18,
 107      UNW_IA64_AR_RNAT = UNW_IA64_AR + 19,
 108      UNW_IA64_AR_CSD = UNW_IA64_AR + 25,
 109      UNW_IA64_AR_26 = UNW_IA64_AR + 26,
 110      UNW_IA64_AR_SSD = UNW_IA64_AR_26,
 111      UNW_IA64_AR_CCV = UNW_IA64_AR + 32,
 112      UNW_IA64_AR_UNAT = UNW_IA64_AR + 36,
 113      UNW_IA64_AR_FPSR = UNW_IA64_AR + 40,
 114      UNW_IA64_AR_PFS = UNW_IA64_AR + 64,
 115      UNW_IA64_AR_LC = UNW_IA64_AR + 65,
 116      UNW_IA64_AR_EC = UNW_IA64_AR + 66,
 117
 118     UNW_IA64_BR = UNW_IA64_AR + 128,    /* branch registers (b0..p7) */
 119       UNW_IA64_RP = UNW_IA64_BR + 0,    /* return pointer (rp) */
 120     UNW_IA64_PR = UNW_IA64_BR + 8,      /* predicate registers (p0..p63) */
 121     UNW_IA64_CFM,
 122
 123     /* frame info: */
 124     UNW_IA64_BSP,
 125     UNW_IA64_IP,
 126     UNW_IA64_SP,
 127
 128     UNW_TDEP_LAST_REG = UNW_IA64_SP,
 129
 130     UNW_TDEP_IP = UNW_IA64_IP,
 131     UNW_TDEP_SP = UNW_IA64_SP,
 132     UNW_TDEP_EH = UNW_IA64_GR + 15
 133   }
 134 ia64_regnum_t;
 135
 136 #define UNW_TDEP_NUM_EH_REGS    4       /* r15-r18 are exception args */
 137
 138 typedef struct unw_tdep_save_loc
 139   {
 140     /* Additional target-dependent info on a save location.  On IA-64,
 141        we use this to provide the bit number in which a NaT bit gets
 142        saved.  */
 143     uint8_t nat_bitnr;
 144
 145     /* Padding reserved for future use.  */
 146     uint8_t reserved[7];
 147   }
 148 unw_tdep_save_loc_t;
 149
 150 /* On IA-64, we can directly use ucontext_t as the unwind context.  */
 151 typedef ucontext_t unw_tdep_context_t;
 152
 153 #define unw_tdep_is_fpreg(r)            ((unsigned) ((r) - UNW_IA64_FR) < 128)
 154
 155 #include "libunwind-dynamic.h"
 156 #include "libunwind-common.h"
 157
 158 #ifdef __hpux
 159   /* In theory, we could use _Uia64_getcontext() on HP-UX as well, but
 160      the benefit of doing so would be marginal given that it can't
 161      support UNW_LOCAL_ONLY.  */
 162 # define unw_tdep_getcontext            getcontext
 163 #else
 164 # define unw_tdep_getcontext            UNW_ARCH_OBJ (getcontext)
 165   extern int unw_tdep_getcontext (unw_tdep_context_t *);
 166 #endif
 167
 168 /* This is a helper routine to search an ia64 unwind table.  If the
 169    address-space argument AS points to something other than the local
 170    address-space, the memory for the unwind-info will be allocated
 171    with malloc(), and should be free()d during the put_unwind_info()
 172    callback.  This routine is signal-safe for the local-address-space
 173    case ONLY.  */
 174 #define unw_search_ia64_unwind_table    UNW_OBJ(search_unwind_table)
 175 extern int unw_search_ia64_unwind_table (unw_addr_space_t, unw_word_t,
 176                                          unw_dyn_info_t *, unw_proc_info_t *,
 177                                          int, void *);
 178
 179 /* This is a helper routine which the get_dyn_info_list_addr()
 180    callback can use to locate the special dynamic-info list entry in
 181    an IA-64 unwind table.  If the entry exists in the table, the
 182    list-address is returned.  In all other cases, 0 is returned.  */
 183 extern unw_word_t _Uia64_find_dyn_list (unw_addr_space_t, unw_dyn_info_t *,
 184                                         void *);
 185
 186 /* This is a helper routine to obtain the kernel-unwind info.  It is
 187    signal-safe.  */
 188 extern int _Uia64_get_kernel_table (unw_dyn_info_t *);
 189
 190 #if defined(__cplusplus) || defined(c_plusplus)
 191 }
 192 #endif
 193
 194 #endif /* LIBUNWIND_H */