src/libs/libunwind/hppa/Ginit.c

   1 /* libunwind - a platform-independent unwind library
   2    Copyright (C) 2002, 2004 Hewlett-Packard Co
   3    Copyright (C) 2007 David Mosberger-Tang
   4         Contributed by David Mosberger-Tang <dmosberger@gmail.com>
   5
   6 This file is part of libunwind.
   7
   8 Permission is hereby granted, free of charge, to any person obtaining
   9 a copy of this software and associated documentation files (the
  10 "Software"), to deal in the Software without restriction, including
  11 without limitation the rights to use, copy, modify, merge, publish,
  12 distribute, sublicense, and/or sell copies of the Software, and to
  13 permit persons to whom the Software is furnished to do so, subject to
  14 the following conditions:
  15
  16 The above copyright notice and this permission notice shall be
  17 included in all copies or substantial portions of the Software.
  18
  19 THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
  20 EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
  21 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
  22 NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
  23 LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
  24 OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
  25 WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.  */
  26
  27 #include <stdlib.h>
  28 #include <string.h>
  29
  30 #include "unwind_i.h"
  31
  32 #ifdef UNW_REMOTE_ONLY
  33
  34 /* unw_local_addr_space is a NULL pointer in this case.  */
  35 PROTECTED unw_addr_space_t unw_local_addr_space;
  36
  37 #else /* !UNW_REMOTE_ONLY */
  38
  39 static struct unw_addr_space local_addr_space;
  40
  41 PROTECTED unw_addr_space_t unw_local_addr_space = &local_addr_space;
  42
  43 static inline void *
  44 uc_addr (ucontext_t *uc, int reg)
  45 {
  46   void *addr;
  47
  48   if ((unsigned) (reg - UNW_HPPA_GR) < 32)
  49     addr = &uc->uc_mcontext.sc_gr[reg - UNW_HPPA_GR];
  50   else if ((unsigned) (reg - UNW_HPPA_FR) < 32)
  51     addr = &uc->uc_mcontext.sc_fr[reg - UNW_HPPA_FR];
  52   else
  53     addr = NULL;
  54   return addr;
  55 }
  56
  57 # ifdef UNW_LOCAL_ONLY
  58
  59 void *
  60 _Uhppa_uc_addr (ucontext_t *uc, int reg)
  61 {
  62   return uc_addr (uc, reg);
  63 }
  64
  65 # endif /* UNW_LOCAL_ONLY */
  66
  67 HIDDEN unw_dyn_info_list_t _U_dyn_info_list;
  68
  69 /* XXX fix me: there is currently no way to locate the dyn-info list
  70        by a remote unwinder.  On ia64, this is done via a special
  71        unwind-table entry.  Perhaps something similar can be done with
  72        DWARF2 unwind info.  */
  73
  74 static void
  75 put_unwind_info (unw_addr_space_t as, unw_proc_info_t *proc_info, void *arg)
  76 {
  77   /* it's a no-op */
  78 }
  79
  80 static int
  81 get_dyn_info_list_addr (unw_addr_space_t as, unw_word_t *dyn_info_list_addr,
  82                         void *arg)
  83 {
  84   *dyn_info_list_addr = (unw_word_t) &_U_dyn_info_list;
  85   return 0;
  86 }
  87
  88 static int
  89 access_mem (unw_addr_space_t as, unw_word_t addr, unw_word_t *val, int write,
  90             void *arg)
  91 {
  92   if (write)
  93     {
  94       Debug (12, "mem[%x] <- %x\n", addr, *val);
  95       *(unw_word_t *) addr = *val;
  96     }
  97   else
  98     {
  99       *val = *(unw_word_t *) addr;
 100       Debug (12, "mem[%x] -> %x\n", addr, *val);
 101     }
 102   return 0;
 103 }
 104
 105 static int
 106 access_reg (unw_addr_space_t as, unw_regnum_t reg, unw_word_t *val, int write,
 107             void *arg)
 108 {
 109   unw_word_t *addr;
 110   ucontext_t *uc = arg;
 111
 112   if ((unsigned int) (reg - UNW_HPPA_FR) < 32)
 113     goto badreg;
 114
 115   addr = uc_addr (uc, reg);
 116   if (!addr)
 117     goto badreg;
 118
 119   if (write)
 120     {
 121       *(unw_word_t *) addr = *val;
 122       Debug (12, "%s <- %x\n", unw_regname (reg), *val);
 123     }
 124   else
 125     {
 126       *val = *(unw_word_t *) addr;
 127       Debug (12, "%s -> %x\n", unw_regname (reg), *val);
 128     }
 129   return 0;
 130
 131  badreg:
 132   Debug (1, "bad register number %u\n", reg);
 133   return -UNW_EBADREG;
 134 }
 135
 136 static int
 137 access_fpreg (unw_addr_space_t as, unw_regnum_t reg, unw_fpreg_t *val,
 138               int write, void *arg)
 139 {
 140   ucontext_t *uc = arg;
 141   unw_fpreg_t *addr;
 142
 143   if ((unsigned) (reg - UNW_HPPA_FR) > 32)
 144     goto badreg;
 145
 146   addr = uc_addr (uc, reg);
 147   if (!addr)
 148     goto badreg;
 149
 150   if (write)
 151     {
 152       Debug (12, "%s <- %08x.%08x\n",
 153              unw_regname (reg), val->raw.bits[1], val->raw.bits[0]);
 154       *(unw_fpreg_t *) addr = *val;
 155     }
 156   else
 157     {
 158       *val = *(unw_fpreg_t *) addr;
 159       Debug (12, "%s -> %08x.%08x\n",
 160              unw_regname (reg), val->raw.bits[1], val->raw.bits[0]);
 161     }
 162   return 0;
 163
 164  badreg:
 165   Debug (1, "bad register number %u\n", reg);
 166   /* attempt to access a non-preserved register */
 167   return -UNW_EBADREG;
 168 }
 169
 170 static int
 171 get_static_proc_name (unw_addr_space_t as, unw_word_t ip,
 172                       char *buf, size_t buf_len, unw_word_t *offp,
 173                       void *arg)
 174 {
 175   return _Uelf32_get_proc_name (as, getpid (), ip, buf, buf_len, offp);
 176 }
 177
 178 HIDDEN void
 179 hppa_local_addr_space_init (void)
 180 {
 181   memset (&local_addr_space, 0, sizeof (local_addr_space));
 182   local_addr_space.caching_policy = UNW_CACHE_GLOBAL;
 183   local_addr_space.acc.find_proc_info = dwarf_find_proc_info;
 184   local_addr_space.acc.put_unwind_info = put_unwind_info;
 185   local_addr_space.acc.get_dyn_info_list_addr = get_dyn_info_list_addr;
 186   local_addr_space.acc.access_mem = access_mem;
 187   local_addr_space.acc.access_reg = access_reg;
 188   local_addr_space.acc.access_fpreg = access_fpreg;
 189   local_addr_space.acc.resume = hppa_local_resume;
 190   local_addr_space.acc.get_proc_name = get_static_proc_name;
 191   unw_flush_cache (&local_addr_space, 0, 0);
 192 }
 193
 194 #endif /* !UNW_REMOTE_ONLY */