gdb/sparc64-sol2-tdep.c - gdb

Global variables defined

Functions defined

Source code

  1. /* Target-dependent code for Solaris UltraSPARC.

  3.    Copyright (C) 2003-2015 Free Software Foundation, Inc.

  5.    This file is part of GDB.

  7.    This program is free software; you can redistribute it and/or modify
  8.    it under the terms of the GNU General Public License as published by
  9.    the Free Software Foundation; either version 3 of the License, or
  10.    (at your option) any later version.

  12.    This program is distributed in the hope that it will be useful,
  13.    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14.    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15.    GNU General Public License for more details.

  17.    You should have received a copy of the GNU General Public License
  18.    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */

  20. #include "defs.h"
  21. #include "frame.h"
  22. #include "frame-unwind.h"
  23. #include "gdbarch.h"
  24. #include "symtab.h"
  25. #include "objfiles.h"
  26. #include "osabi.h"
  27. #include "trad-frame.h"
  28. #include "regset.h"

  30. #include "sol2-tdep.h"
  31. #include "sparc64-tdep.h"
  32. #include "solib-svr4.h"

  34. /* From <sys/regset.h>.  */
  35. ‌const struct sparc_gregmap sparc64_sol2_gregmap =
  36. {
  37.   32 * 8,                        /* "tstate" */
  38.   33 * 8,                        /* %pc */
  39.   34 * 8,                        /* %npc */
  40.   35 * 8,                        /* %y */
  41.   -1,                                /* %wim */
  42.   -1,                                /* %tbr */
  43.   1 * 8,                        /* %g1 */
  44.   16 * 8,                        /* %l0 */
  45.   8                                /* sizeof (%y) */
  46. };

  48. ‌const struct sparc_fpregmap sparc64_sol2_fpregmap =
  49. {
  50.   0 * 8,                        /* %f0 */
  51.   33 * 8,                        /* %fsr */
  52. };

  54. static void
  55. ‌sparc64_sol2_supply_core_gregset (const struct regset *regset,
  56.                                   struct regcache *regcache,
  57.                                   int regnum, const void *gregs, size_t len)
  58. {
  59.   sparc64_supply_gregset (&sparc64_sol2_gregmap, regcache, regnum, gregs);
  60. }

  62. static void
  63. ‌sparc64_sol2_collect_core_gregset (const struct regset *regset,
  64.                                    const struct regcache *regcache,
  65.                                    int regnum, void *gregs, size_t len)
  66. {
  67.   sparc64_collect_gregset (&sparc64_sol2_gregmap, regcache, regnum, gregs);
  68. }

  70. static void
  71. ‌sparc64_sol2_supply_core_fpregset (const struct regset *regset,
  72.                                    struct regcache *regcache,
  73.                                    int regnum, const void *fpregs, size_t len)
  74. {
  75.   sparc64_supply_fpregset (&sparc64_sol2_fpregmap, regcache, regnum, fpregs);
  76. }

  78. static void
  79. ‌sparc64_sol2_collect_core_fpregset (const struct regset *regset,
  80.                                     const struct regcache *regcache,
  81.                                     int regnum, void *fpregs, size_t len)
  82. {
  83.   sparc64_collect_fpregset (&sparc64_sol2_fpregmap, regcache, regnum, fpregs);
  84. }

  86. ‌static const struct regset sparc64_sol2_gregset =
  87.   {
  88.     NULL,
  89.     sparc64_sol2_supply_core_gregset,
  90.     sparc64_sol2_collect_core_gregset
  91.   };

  93. ‌static const struct regset sparc64_sol2_fpregset =
  94.   {
  95.     NULL,
  96.     sparc64_sol2_supply_core_fpregset,
  97.     sparc64_sol2_collect_core_fpregset
  98.   };


  101. static struct sparc_frame_cache *
  102. ‌sparc64_sol2_sigtramp_frame_cache (struct frame_info *this_frame,
  103.                                    void **this_cache)
  104. {
  105.   struct sparc_frame_cache *cache;
  106.   CORE_ADDR mcontext_addr, addr;
  107.   int regnum;

  109.   if (*this_cache)
  110.     return *this_cache;

  112.   cache = sparc_frame_cache (this_frame, this_cache);
  113.   gdb_assert (cache == *this_cache);

  115.   cache->saved_regs = trad_frame_alloc_saved_regs (this_frame);

  117.   /* The third argument is a pointer to an instance of `ucontext_t',
  118.      which has a member `uc_mcontext' that contains the saved
  119.      registers.  */
  120.   regnum =
  121.     (cache->copied_regs_mask & 0x04) ? SPARC_I2_REGNUM : SPARC_O2_REGNUM;
  122.   mcontext_addr = get_frame_register_unsigned (this_frame, regnum) + 64;

  124.   cache->saved_regs[SPARC64_CCR_REGNUM].addr = mcontext_addr + 0 * 8;
  125.   cache->saved_regs[SPARC64_PC_REGNUM].addr = mcontext_addr + 1 * 8;
  126.   cache->saved_regs[SPARC64_NPC_REGNUM].addr = mcontext_addr + 2 * 8;
  127.   cache->saved_regs[SPARC64_Y_REGNUM].addr = mcontext_addr + 3 * 8;
  128.   cache->saved_regs[SPARC64_ASI_REGNUM].addr = mcontext_addr + 19 * 8;
  129.   cache->saved_regs[SPARC64_FPRS_REGNUM].addr = mcontext_addr + 20 * 8;

  131.   /* Since %g0 is always zero, keep the identity encoding.  */
  132.   for (regnum = SPARC_G1_REGNUM, addr = mcontext_addr + 4 * 8;
  133.        regnum <= SPARC_O7_REGNUM; regnum++, addr += 8)
  134.     cache->saved_regs[regnum].addr = addr;

  136.   if (get_frame_memory_unsigned (this_frame, mcontext_addr + 21 * 8, 8))
  137.     {
  138.       /* The register windows haven't been flushed.  */
  139.       for (regnum = SPARC_L0_REGNUM; regnum <= SPARC_I7_REGNUM; regnum++)
  140.         trad_frame_set_unknown (cache->saved_regs, regnum);
  141.     }
  142.   else
  143.     {
  144.       CORE_ADDR sp;

  146.       addr = cache->saved_regs[SPARC_SP_REGNUM].addr;
  147.       sp = get_frame_memory_unsigned (this_frame, addr, 8);
  148.       for (regnum = SPARC_L0_REGNUM, addr = sp + BIAS;
  149.            regnum <= SPARC_I7_REGNUM; regnum++, addr += 8)
  150.         cache->saved_regs[regnum].addr = addr;
  151.     }

  153.   return cache;
  154. }

  156. static void
  157. ‌sparc64_sol2_sigtramp_frame_this_id (struct frame_info *this_frame,
  158.                                      void **this_cache,
  159.                                      struct frame_id *this_id)
  160. {
  161.   struct sparc_frame_cache *cache =
  162.     sparc64_sol2_sigtramp_frame_cache (this_frame, this_cache);

  164.   (*this_id) = frame_id_build (cache->base, cache->pc);
  165. }

  167. static struct value *
  168. ‌sparc64_sol2_sigtramp_frame_prev_register (struct frame_info *this_frame,
  169.                                            void **this_cache,
  170.                                            int regnum)
  171. {
  172.   struct sparc_frame_cache *cache =
  173.     sparc64_sol2_sigtramp_frame_cache (this_frame, this_cache);

  175.   return trad_frame_get_prev_register (this_frame, cache->saved_regs, regnum);
  176. }

  178. static int
  179. ‌sparc64_sol2_sigtramp_frame_sniffer (const struct frame_unwind *self,
  180.                                      struct frame_info *this_frame,
  181.                                      void **this_cache)
  182. {
  183.   CORE_ADDR pc = get_frame_pc (this_frame);
  184.   const char *name;

  186.   find_pc_partial_function (pc, &name, NULL, NULL);
  187.   if (sparc_sol2_pc_in_sigtramp (pc, name))
  188.     return 1;

  190.   return 0;
  191. }
  192. ‌static const struct frame_unwind sparc64_sol2_sigtramp_frame_unwind =
  193. {
  194.   SIGTRAMP_FRAME,
  195.   default_frame_unwind_stop_reason,
  196.   sparc64_sol2_sigtramp_frame_this_id,
  197.   sparc64_sol2_sigtramp_frame_prev_register,
  198.   NULL,
  199.   sparc64_sol2_sigtramp_frame_sniffer
  200. };



  204. void
  205. ‌sparc64_sol2_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  206. {
  207.   struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);

  209.   tdep->gregset = &sparc64_sol2_gregset;
  210.   tdep->sizeof_gregset = 304;

  212.   tdep->fpregset = &sparc64_sol2_fpregset;
  213.   tdep->sizeof_fpregset = 544;

  215.   frame_unwind_append_unwinder (gdbarch, &sparc64_sol2_sigtramp_frame_unwind);

  217.   sparc64_init_abi (info, gdbarch);

  219.   /* The Sun compilers (Sun ONE Studio, Forte Developer, Sun WorkShop, SunPRO)
  220.      compiler puts out 0 instead of the address in N_SO stabs.  Starting with
  221.      SunPRO 3.0, the compiler does this for N_FUN stabs too.  */
  222.   set_gdbarch_sofun_address_maybe_missing (gdbarch, 1);

  224.   /* The Sun compilers also do "globalization"; see the comment in
  225.      sparc_sol2_static_transform_name for more information.  */
  226.   set_gdbarch_static_transform_name
  227.     (gdbarch, sparc_sol2_static_transform_name);

  229.   /* Solaris has SVR4-style shared libraries...  */
  230.   set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
  231.   set_gdbarch_skip_solib_resolver (gdbarch, sol2_skip_solib_resolver);
  232.   set_solib_svr4_fetch_link_map_offsets
  233.     (gdbarch, svr4_lp64_fetch_link_map_offsets);

  235.   /* ...which means that we need some special handling when doing
  236.      prologue analysis.  */
  237.   tdep->plt_entry_size = 16;

  239.   /* Solaris has kernel-assisted single-stepping support.  */
  240.   set_gdbarch_software_single_step (gdbarch, NULL);

  242.   /* How to print LWP PTIDs from core files.  */
  243.   set_gdbarch_core_pid_to_str (gdbarch, sol2_core_pid_to_str);
  244. }


  247. /* Provide a prototype to silence -Wmissing-prototypes.  */
  248. void _initialize_sparc64_sol2_tdep (void);

  250. void
  251. ‌_initialize_sparc64_sol2_tdep (void)
  252. {
  253.   gdbarch_register_osabi (bfd_arch_sparc, bfd_mach_sparc_v9,
  254.                           GDB_OSABI_SOLARIS, sparc64_sol2_init_abi);
  255. }