headers/libs/libunwind/tdep-tilegx/libunwind_i.h

   1 /* libunwind - a platform-independent unwind library
   2    Copyright (C) 2008 CodeSourcery
   3    Copyright (C) 2014 Tilera Corp.
   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 TILEGX_LIBUNWIND_I_H
  27 #define TILEGX_LIBUNWIND_I_H
  28
  29 /* Target-dependent definitions that are internal to libunwind but need
  30    to be shared with target-independent code.  */
  31
  32 #include <stdlib.h>
  33 #include <libunwind.h>
  34
  35 # include "elf64.h"
  36 #include "mempool.h"
  37 #include "dwarf.h"
  38
  39 #ifdef HAVE___THREAD
  40 # undef HAVE___THREAD
  41 #endif
  42
  43 typedef struct
  44 {
  45   /* no Tilegx-specific fast trace */
  46 } unw_tdep_frame_t;
  47
  48 struct unw_addr_space
  49 {
  50   struct unw_accessors acc;
  51
  52   int big_endian;
  53   tilegx_abi_t abi;
  54   unsigned int addr_size;
  55
  56   unw_caching_policy_t caching_policy;
  57 #ifdef HAVE_ATOMIC_OPS_H
  58   AO_t cache_generation;
  59 #else
  60   uint32_t cache_generation;
  61 #endif
  62   unw_word_t dyn_generation;          /* see dyn-common.h */
  63   unw_word_t dyn_info_list_addr;      /* (cached) dyn_info_list_addr */
  64   struct dwarf_rs_cache global_cache;
  65   struct unw_debug_frame_list *debug_frames;
  66 };
  67
  68 #define tdep_big_endian(as)            ((as)->big_endian)
  69
  70 struct cursor
  71 {
  72   struct dwarf_cursor dwarf;         /* must be first */
  73   unw_word_t sigcontext_addr;
  74   unw_word_t sigcontext_sp;
  75   unw_word_t sigcontext_pc;
  76 };
  77
  78 #define DWARF_GET_LOC(l)      ((l).val)
  79
  80 #ifndef UNW_REMOTE_ONLY
  81 typedef long tilegx_reg_t;
  82 #endif
  83
  84 #ifdef UNW_LOCAL_ONLY
  85 #define DWARF_NULL_LOC         DWARF_LOC (0, 0)
  86 #define DWARF_IS_NULL_LOC(l)   (DWARF_GET_LOC (l) == 0)
  87 #define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r) })
  88 #define DWARF_IS_REG_LOC(l)    0
  89 #define DWARF_REG_LOC(c,r)     (DWARF_LOC((unw_word_t) (intptr_t)       \
  90                                           tdep_uc_addr((c)->as_arg, (r)), 0))
  91 #define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
  92 #define DWARF_FPREG_LOC(c,r)   (DWARF_LOC((unw_word_t) (intptr_t)       \
  93                                           tdep_uc_addr((c)->as_arg, (r)), 0))
  94
  95 /* Tilegx has no FP. */
  96 static inline int
  97 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
  98 {
  99   Debug (1, "Tielgx has no fp!\n");
 100   abort();
 101   return 0;
 102 }
 103
 104 static inline int
 105 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
 106 {
 107   Debug (1, "Tielgx has no fp!\n");
 108   abort();
 109   return 0;
 110 }
 111
 112 static inline int
 113 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
 114 {
 115   if (!DWARF_GET_LOC (loc))
 116     return -1;
 117
 118   *val = *(tilegx_reg_t *) (intptr_t) DWARF_GET_LOC (loc);
 119   return 0;
 120 }
 121
 122 static inline int
 123 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
 124 {
 125   if (!DWARF_GET_LOC (loc))
 126     return -1;
 127
 128   *(tilegx_reg_t *) (intptr_t) DWARF_GET_LOC (loc) = val;
 129   return 0;
 130 }
 131
 132 #else /* !UNW_LOCAL_ONLY */
 133 #define DWARF_LOC_TYPE_FP      (1 << 0)
 134 #define DWARF_LOC_TYPE_REG     (1 << 1)
 135 #define DWARF_NULL_LOC         DWARF_LOC (0, 0)
 136 #define DWARF_IS_NULL_LOC(l)                                    \
 137   ({ dwarf_loc_t _l = (l); _l.val == 0 && _l.type == 0; })
 138 #define DWARF_LOC(r, t)        ((dwarf_loc_t) { .val = (r), .type = (t) })
 139 #define DWARF_IS_REG_LOC(l)    (((l).type & DWARF_LOC_TYPE_REG) != 0)
 140 #define DWARF_IS_FP_LOC(l)     (((l).type & DWARF_LOC_TYPE_FP) != 0)
 141 #define DWARF_REG_LOC(c,r)     DWARF_LOC((r), DWARF_LOC_TYPE_REG)
 142 #define DWARF_MEM_LOC(c,m)     DWARF_LOC ((m), 0)
 143 #define DWARF_FPREG_LOC(c,r)   DWARF_LOC((r), (DWARF_LOC_TYPE_REG       \
 144                                                | DWARF_LOC_TYPE_FP))
 145
 146 /* TILEGX has no fp. */
 147 static inline int
 148 dwarf_getfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t *val)
 149 {
 150   Debug (1, "Tielgx has no fp!\n");
 151   abort();
 152   return 0;
 153 }
 154
 155 static inline int
 156 dwarf_putfp (struct dwarf_cursor *c, dwarf_loc_t loc, unw_fpreg_t val)
 157 {
 158   Debug (1, "Tielgx has no fp!\n");
 159   abort();
 160   return 0;
 161 }
 162
 163 static inline int
 164 dwarf_get (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t *val)
 165 {
 166   if (DWARF_IS_NULL_LOC (loc))
 167     return -UNW_EBADREG;
 168
 169   /* If a code-generator were to save a value of type unw_word_t in a
 170      floating-point register, we would have to support this case.  I
 171      suppose it could happen with MMX registers, but does it really
 172      happen?  */
 173   assert (!DWARF_IS_FP_LOC (loc));
 174
 175   if (DWARF_IS_REG_LOC (loc))
 176     return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), val,
 177                                      0, c->as_arg);
 178
 179   return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), val,
 180                                    0, c->as_arg);
 181 }
 182
 183 static inline int
 184 dwarf_put (struct dwarf_cursor *c, dwarf_loc_t loc, unw_word_t val)
 185 {
 186   if (DWARF_IS_NULL_LOC (loc))
 187     return -UNW_EBADREG;
 188
 189   /* If a code-generator were to save a value of type unw_word_t in a
 190      floating-point register, we would have to support this case.  I
 191      suppose it could happen with MMX registers, but does it really
 192      happen?  */
 193   assert (!DWARF_IS_FP_LOC (loc));
 194
 195   if (DWARF_IS_REG_LOC (loc))
 196     return (*c->as->acc.access_reg) (c->as, DWARF_GET_LOC (loc), &val,
 197                                      1, c->as_arg);
 198
 199   return (*c->as->acc.access_mem) (c->as, DWARF_GET_LOC (loc), &val,
 200                                    1, c->as_arg);
 201 }
 202
 203 #endif /* !UNW_LOCAL_ONLY */
 204
 205 #define tdep_getcontext_trace           unw_getcontext
 206 #define tdep_init_done                  UNW_OBJ(init_done)
 207 #define tdep_needs_initialization       UNW_OBJ(needs_initialization)
 208 #define tdep_init                       UNW_OBJ(init)
 209 /* Platforms that support UNW_INFO_FORMAT_TABLE need to define
 210    tdep_search_unwind_table.  */
 211 #define tdep_search_unwind_table        dwarf_search_unwind_table
 212 #define tdep_find_unwind_table          dwarf_find_unwind_table
 213 #define tdep_uc_addr                    UNW_ARCH_OBJ(uc_addr)
 214 #define tdep_get_elf_image              UNW_ARCH_OBJ(get_elf_image)
 215 #define tdep_access_reg                 UNW_OBJ(access_reg)
 216 #define tdep_access_fpreg               UNW_OBJ(access_fpreg)
 217 #define tdep_fetch_frame(c,ip,n)        do {} while(0)
 218 #define tdep_cache_frame(c,rs)          do {} while(0)
 219 #define tdep_reuse_frame(c,rs)          do {} while(0)
 220 #define tdep_stash_frame(c,rs)          do {} while(0)
 221 #define tdep_trace(cur,addr,n)          (-UNW_ENOINFO)
 222
 223 #ifdef UNW_LOCAL_ONLY
 224 #define tdep_find_proc_info(c,ip,n)                            \
 225   dwarf_find_proc_info((c)->as, (ip), &(c)->pi, (n),           \
 226                        (c)->as_arg)
 227 #define tdep_put_unwind_info(as,pi,arg)         \
 228   dwarf_put_unwind_info((as), (pi), (arg))
 229 #else
 230 #define tdep_find_proc_info(c,ip,n)                                     \
 231   (*(c)->as->acc.find_proc_info)((c)->as, (ip), &(c)->pi, (n),          \
 232                                  (c)->as_arg)
 233 #define tdep_put_unwind_info(as,pi,arg)                 \
 234   (*(as)->acc.put_unwind_info)((as), (pi), (arg))
 235 #endif
 236
 237 #define tdep_get_as(c)                  ((c)->dwarf.as)
 238 #define tdep_get_as_arg(c)              ((c)->dwarf.as_arg)
 239 #define tdep_get_ip(c)                  ((c)->dwarf.ip)
 240
 241 extern int tdep_init_done;
 242
 243 extern void tdep_init (void);
 244 extern int tdep_search_unwind_table (unw_addr_space_t as,
 245                                      unw_word_t ip,
 246                                      unw_dyn_info_t *di,
 247                                      unw_proc_info_t *pi,
 248                                      int need_unwind_info,
 249                                      void *arg);
 250 extern void *tdep_uc_addr (ucontext_t *uc, int reg);
 251 extern int tdep_get_elf_image (struct elf_image *ei,
 252                                pid_t pid, unw_word_t ip,
 253                                unsigned long *segbase,
 254                                unsigned long *mapoff,
 255                                char *path, size_t pathlen);
 256 extern int tdep_access_reg (struct cursor *c,
 257                             unw_regnum_t reg,
 258                             unw_word_t *valp,
 259                             int write);
 260 extern int tdep_access_fpreg (struct cursor *c,
 261                               unw_regnum_t reg,
 262                               unw_fpreg_t *valp,
 263                               int write);
 264
 265 #endif /* TILEGX_LIBUNWIND_I_H */