gdb/tilegx-linux-tdep.c - gdb

Global variables defined

Functions defined

Macros defined

Source code

  1. /* Target-dependent code for GNU/Linux on Tilera TILE-Gx processors.

  3.    Copyright (C) 2012-2015 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 "osabi.h"
  22. #include "linux-tdep.h"
  23. #include "glibc-tdep.h"
  24. #include "solib-svr4.h"
  25. #include "symtab.h"
  26. #include "regcache.h"
  27. #include "regset.h"
  28. #include "tramp-frame.h"
  29. #include "trad-frame.h"
  30. #include "tilegx-tdep.h"

  32. /* Signal trampoline support.  */

  34. static void
  35. ‌tilegx_linux_sigframe_init (const struct tramp_frame *self,
  36.                             struct frame_info *this_frame,
  37.                             struct trad_frame_cache *this_cache,
  38.                             CORE_ADDR func)
  39. {
  40.   CORE_ADDR pc = get_frame_register_unsigned (this_frame, 64);
  41.   CORE_ADDR sp = get_frame_register_unsigned (this_frame, 54);

  43.   /* Base address of register save area.  */
  44.   CORE_ADDR base = sp
  45.                    + 16    /* Skip ABI_SAVE_AREA.  */
  46.                    + 128   /* Skip SIGINFO.  */
  47.                    + 40;   /* Skip UCONTEXT.  */

  49.   /* Address of saved LR register (R56) which holds previous PC.  */
  50.   CORE_ADDR prev_pc = base + 56 * 8;

  52.   int i;

  54.   for (i = 0; i < 56; i++)
  55.     trad_frame_set_reg_addr (this_cache, i, base + i * 8);

  57.   trad_frame_set_reg_value (this_cache, 64,
  58.                             get_frame_memory_unsigned (this_frame, prev_pc, 8));

  60.   /* Save a frame ID.  */
  61.   trad_frame_set_id (this_cache, frame_id_build (base, func));
  62. }

  64. ‌static const struct tramp_frame tilegx_linux_rt_sigframe =
  65. {
  66.   SIGTRAMP_FRAME,
  67.   8,
  68.   {
  69.     { 0x00045fe551483000ULL, -1 }, /* { moveli r10, 139 } */
  70.     { 0x286b180051485000ULL, -1 }, /* { swint1 } */
  71.     { TRAMP_SENTINEL_INSN, -1 }
  72.   },
  73.   tilegx_linux_sigframe_init
  74. };

  76. /* Register map; must match struct pt_regs in "ptrace.h".  */

  78. ‌static const struct regcache_map_entry tilegx_linux_regmap[] =
  79.   {
  80.     { TILEGX_NUM_EASY_REGS, TILEGX_FIRST_EASY_REGNUM, 8 },
  81.     { 1, TILEGX_PC_REGNUM, 8 },
  82.     { 1, TILEGX_FAULTNUM_REGNUM, 8 },
  83.     { 0 }
  84.   };

  86. ‌#define TILEGX_LINUX_SIZEOF_GREGSET (64 * 8)

  88. /* TILE-Gx Linux kernel register set.  */

  90. ‌static const struct regset tilegx_linux_regset =
  91. {
  92.   tilegx_linux_regmap,
  93.   regcache_supply_regset, regcache_collect_regset
  94. };


  97. static void
  98. ‌tilegx_iterate_over_regset_sections (struct gdbarch *gdbarch,
  99.                                      iterate_over_regset_sections_cb *cb,
  100.                                      void *cb_data,
  101.                                      const struct regcache *regcache)
  102. {
  103.   cb (".reg", TILEGX_LINUX_SIZEOF_GREGSET, &tilegx_linux_regset,
  104.       NULL, cb_data);
  105. }

  107. /* OS specific initialization of gdbarch.  */

  109. static void
  110. ‌tilegx_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
  111. {
  112.   int arch_size = gdbarch_addr_bit (gdbarch);

  114.   linux_init_abi (info, gdbarch);

  116.   tramp_frame_prepend_unwinder (gdbarch, &tilegx_linux_rt_sigframe);

  118.   set_gdbarch_iterate_over_regset_sections
  119.     (gdbarch, tilegx_iterate_over_regset_sections);

  121.   /* GNU/Linux uses SVR4-style shared libraries.  */
  122.   if (arch_size == 32)
  123.     set_solib_svr4_fetch_link_map_offsets (gdbarch,
  124.                                            svr4_ilp32_fetch_link_map_offsets);
  125.   else
  126.     set_solib_svr4_fetch_link_map_offsets (gdbarch,
  127.                                            svr4_lp64_fetch_link_map_offsets);

  129.   /* Enable TLS support.  */
  130.   set_gdbarch_fetch_tls_load_module_address (gdbarch,
  131.                                              svr4_fetch_objfile_link_map);

  133.   /* Shared library handling.  */
  134.   set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
  135.   set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);

  137.   set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type);
  138. }

  140. /* Provide a prototype to silence -Wmissing-prototypes.  */
  141. extern initialize_file_ftype _initialize_tilegx_linux_tdep;

  143. void
  144. ‌_initialize_tilegx_linux_tdep (void)
  145. {
  146.   gdbarch_register_osabi (bfd_arch_tilegx, bfd_mach_tilegx, GDB_OSABI_LINUX,
  147.                           tilegx_linux_init_abi);
  148. }