Merge GDB 7.5.1

gdb/tilegx-linux-tdep.c

+/* Target-dependent code for GNU/Linux on Tilera TILE-Gx processors.
+
+   Copyright 2012 Free Software Foundation, Inc.
+
+   This file is part of GDB.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
+
+#include "defs.h"
+#include "osabi.h"
+#include "linux-tdep.h"
+#include "glibc-tdep.h"
+#include "solib-svr4.h"
+#include "symtab.h"
+#include "regcache.h"
+#include "regset.h"
+#include "tramp-frame.h"
+#include "trad-frame.h"
+#include "tilegx-tdep.h"
+
+/* Signal trampoline support.  */
+
+static void
+tilegx_linux_sigframe_init (const struct tramp_frame *self,
+                            struct frame_info *this_frame,
+                            struct trad_frame_cache *this_cache,
+                            CORE_ADDR func)
+{
+  CORE_ADDR pc = get_frame_register_unsigned (this_frame, 64);
+  CORE_ADDR sp = get_frame_register_unsigned (this_frame, 54);
+  CORE_ADDR base = sp + 16;
+  int i;
+
+  for (i = 0; i < 56; i++)
+    trad_frame_set_reg_addr (this_cache, i, base + i * 8);
+
+  trad_frame_set_reg_value (this_cache, 64, pc);
+
+  /* Save a frame ID.  */
+  trad_frame_set_id (this_cache, frame_id_build (base, func));
+}
+
+static const struct tramp_frame tilegx_linux_rt_sigframe =
+{
+  SIGTRAMP_FRAME,
+  8,
+  {
+    { 0x00045fe551483000ULL, -1 }, /* { moveli r10, 139 } */
+    { 0x286b180051485000ULL, -1 }, /* { swint1 } */
+    { TRAMP_SENTINEL_INSN, -1 }
+  },
+  tilegx_linux_sigframe_init
+};
+
+/* Supply raw registers from REGCACHE to REGS.  */
+
+static void
+tilegx_linux_supply_regset (const struct regset *regset,
+                            struct regcache *regcache,
+                            int regnum, const void *regs, size_t len)
+{
+  struct gdbarch *arch = get_regcache_arch (regcache);
+  const char *ptr = regs;
+  int i;
+
+  /* This logic must match that of struct pt_regs in "ptrace.h".  */
+  for (i = 0; i < TILEGX_NUM_EASY_REGS + 1; i++, ptr += tilegx_reg_size)
+    {
+      int gri = (i < TILEGX_NUM_EASY_REGS) ? i : TILEGX_PC_REGNUM;
+
+      if (regnum == gri || regnum == -1)
+        regcache_raw_supply (regcache, gri, ptr);
+    }
+}
+
+/* TILE-Gx Linux kernel register set.  */
+static struct regset tilegx_linux_regset =
+{
+  NULL,
+  tilegx_linux_supply_regset
+};
+
+static const struct regset *
+tilegx_regset_from_core_section (struct gdbarch *gdbarch,
+                                 const char *sect_name,
+                                 size_t sect_size)
+{
+  if (strcmp (sect_name, ".reg") == 0)
+    return &tilegx_linux_regset;
+
+  return NULL;
+}
+
+/* OS specific initialization of gdbarch.  */
+
+static void
+tilegx_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
+{
+  int arch_size = gdbarch_addr_bit (gdbarch);
+
+  linux_init_abi (info, gdbarch);
+
+  tramp_frame_prepend_unwinder (gdbarch, &tilegx_linux_rt_sigframe);
+
+  set_gdbarch_regset_from_core_section (gdbarch,
+                                        tilegx_regset_from_core_section);
+
+  /* GNU/Linux uses SVR4-style shared libraries.  */
+  if (arch_size == 32)
+    set_solib_svr4_fetch_link_map_offsets (gdbarch,
+                                           svr4_ilp32_fetch_link_map_offsets);
+  else
+    set_solib_svr4_fetch_link_map_offsets (gdbarch,
+                                           svr4_lp64_fetch_link_map_offsets);
+
+  /* Enable TLS support.  */
+  set_gdbarch_fetch_tls_load_module_address (gdbarch,
+                                             svr4_fetch_objfile_link_map);
+
+  /* Shared library handling.  */
+  set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+  set_gdbarch_skip_solib_resolver (gdbarch, glibc_skip_solib_resolver);
+
+  set_gdbarch_get_siginfo_type (gdbarch, linux_get_siginfo_type);
+}
+
+/* Provide a prototype to silence -Wmissing-prototypes.  */
+extern initialize_file_ftype _initialize_tilegx_linux_tdep;
+
+void
+_initialize_tilegx_linux_tdep (void)
+{
+  gdbarch_register_osabi (bfd_arch_tilegx, bfd_mach_tilegx, GDB_OSABI_LINUX,
+                          tilegx_linux_init_abi);
+}