Fix PR threads/19422 - show which thread caused stop

[deliverable/binutils-gdb.git] / gdb / aarch64-linux-nat.c

diff --git a/gdb/aarch64-linux-nat.c b/gdb/aarch64-linux-nat.c
index ddb2788ba84c80cac8cf44bbcdec298d54fa7f2d..fe1631dbbb64209b47de5d6bdc4e2b3d3b5d0f9b 100644 (file)
--- a/gdb/aarch64-linux-nat.c
+++ b/gdb/aarch64-linux-nat.c
@@ -1,6 +1,6 @@
 /* Native-dependent code for GNU/Linux AArch64.
 
-   Copyright (C) 2011-2015 Free Software Foundation, Inc.
+   Copyright (C) 2011-2016 Free Software Foundation, Inc.
    Contributed by ARM Ltd.
 
    This file is part of GDB.
@@ -460,21 +460,10 @@ ps_err_e
 ps_get_thread_area (const struct ps_prochandle *ph,
                    lwpid_t lwpid, int idx, void **base)
 {
-  struct iovec iovec;
-  uint64_t reg;
-
-  iovec.iov_base = ®
-  iovec.iov_len = sizeof (reg);
-
-  if (ptrace (PTRACE_GETREGSET, lwpid, NT_ARM_TLS, &iovec) != 0)
-    return PS_ERR;
+  int is_64bit_p
+    = (gdbarch_bfd_arch_info (target_gdbarch ())->bits_per_word == 64);
 
-  /* IDX is the bias from the thread pointer to the beginning of the
-     thread descriptor.  It has to be subtracted due to implementation
-     quirks in libthread_db.  */
-  *base = (void *) (reg - idx);
-
-  return PS_OK;
+  return aarch64_ps_get_thread_area (ph, lwpid, idx, base, is_64bit_p);
 }
 \f
 
@@ -619,11 +608,13 @@ aarch64_linux_insert_hw_breakpoint (struct target_ops *self,
 {
   int ret;
   CORE_ADDR addr = bp_tgt->placed_address = bp_tgt->reqstd_address;
-  const int len = 4;
+  int len;
   const enum target_hw_bp_type type = hw_execute;
   struct aarch64_debug_reg_state *state
     = aarch64_get_debug_reg_state (ptid_get_pid (inferior_ptid));
 
+  gdbarch_breakpoint_from_pc (gdbarch, &addr, &len);
+
   if (show_debug_regs)
     fprintf_unfiltered
       (gdb_stdlog,
@@ -651,11 +642,13 @@ aarch64_linux_remove_hw_breakpoint (struct target_ops *self,
 {
   int ret;
   CORE_ADDR addr = bp_tgt->placed_address;
-  const int len = 4;
+  int len = 4;
   const enum target_hw_bp_type type = hw_execute;
   struct aarch64_debug_reg_state *state
     = aarch64_get_debug_reg_state (ptid_get_pid (inferior_ptid));
 
+  gdbarch_breakpoint_from_pc (gdbarch, &addr, &len);
+
   if (show_debug_regs)
     fprintf_unfiltered
       (gdb_stdlog, "remove_hw_breakpoint on entry (addr=0x%08lx, len=%d))\n",
@@ -807,6 +800,14 @@ aarch64_linux_watchpoint_addr_within_range (struct target_ops *target,
   return start <= addr && start + length - 1 >= addr;
 }
 
+/* Implement the "to_can_do_single_step" target_ops method.  */
+
+static int
+aarch64_linux_can_do_single_step (struct target_ops *target)
+{
+  return 1;
+}
+
 /* Define AArch64 maintenance commands.  */
 
 static void
@@ -858,6 +859,7 @@ _initialize_aarch64_linux_nat (void)
   t->to_stopped_data_address = aarch64_linux_stopped_data_address;
   t->to_watchpoint_addr_within_range =
     aarch64_linux_watchpoint_addr_within_range;
+  t->to_can_do_single_step = aarch64_linux_can_do_single_step;
 
   /* Override the GNU/Linux inferior startup hook.  */
   super_post_startup_inferior = t->to_post_startup_inferior;