lwp_info: Make the arch code free arch_lwp_info

[deliverable/binutils-gdb.git] / gdb / gdbserver / linux-arm-low.c

diff --git a/gdb/gdbserver/linux-arm-low.c b/gdb/gdbserver/linux-arm-low.c
index 57826f17d7639d5b616b08bcec783c3821bdeb94..b27c47e84c4ffe15a4ebba517f78688baca2e4ec 100644 (file)
--- a/gdb/gdbserver/linux-arm-low.c
+++ b/gdb/gdbserver/linux-arm-low.c
@@ -1,5 +1,5 @@
 /* GNU/Linux/ARM specific low level interface, for the remote server for GDB.
-   Copyright (C) 1995-2016 Free Software Foundation, Inc.
+   Copyright (C) 1995-2017 Free Software Foundation, Inc.
 
    This file is part of GDB.
 
@@ -262,14 +262,16 @@ get_next_pcs_read_memory_unsigned_integer (CORE_ADDR memaddr,
 {
   ULONGEST res;
 
-  (*the_target->read_memory) (memaddr, (unsigned char *) &res, len);
+  res = 0;
+  target_read_memory (memaddr, (unsigned char *) &res, len);
+
   return res;
 }
 
 /* Fetch the thread-local storage pointer for libthread_db.  */
 
 ps_err_e
-ps_get_thread_area (const struct ps_prochandle *ph,
+ps_get_thread_area (struct ps_prochandle *ph,
                    lwpid_t lwpid, int idx, void **base)
 {
   if (ptrace (PTRACE_GET_THREAD_AREA, lwpid, NULL, base) != 0)
@@ -653,6 +655,14 @@ arm_new_thread (struct lwp_info *lwp)
   lwp->arch_private = info;
 }
 
+/* Function to call when a thread is being deleted.  */
+
+static void
+arm_delete_thread (struct arch_lwp_info *arch_lwp)
+{
+  xfree (arch_lwp);
+}
+
 static void
 arm_new_fork (struct process_info *parent, struct process_info *child)
 {
@@ -763,7 +773,7 @@ arm_sigreturn_next_pc (struct regcache *regcache, int svc_number,
   /* Offset of PC register.  */
   int pc_offset = 0;
   CORE_ADDR next_pc = 0;
-  CORE_ADDR cpsr;
+  uint32_t cpsr;
 
   gdb_assert (svc_number == __NR_sigreturn || svc_number == __NR_rt_sigreturn);
 
@@ -803,7 +813,7 @@ get_next_pcs_syscall_next_pc (struct arm_get_next_pcs *self)
       unsigned long this_instr;
       unsigned long svc_operand;
 
-      (*the_target->read_memory) (pc, (unsigned char *) &this_instr, 4);
+      target_read_memory (pc, (unsigned char *) &this_instr, 4);
       svc_operand = (0x00ffffff & this_instr);
 
       if (svc_operand)  /* OABI.  */
@@ -923,11 +933,10 @@ arm_arch_setup (void)
 
 /* Fetch the next possible PCs after the current instruction executes.  */
 
-static VEC (CORE_ADDR) *
+static std::vector<CORE_ADDR>
 arm_gdbserver_get_next_pcs (struct regcache *regcache)
 {
   struct arm_get_next_pcs next_pcs_ctx;
-  VEC (CORE_ADDR) *next_pcs = NULL;
 
   arm_get_next_pcs_ctor (&next_pcs_ctx,
                         &get_next_pcs_ops,
@@ -937,9 +946,7 @@ arm_gdbserver_get_next_pcs (struct regcache *regcache)
                         1,
                         regcache);
 
-  next_pcs = arm_get_next_pcs (&next_pcs_ctx);
-
-  return next_pcs;
+  return arm_get_next_pcs (&next_pcs_ctx);
 }
 
 /* Support for hardware single step.  */
@@ -950,6 +957,40 @@ arm_supports_hardware_single_step (void)
   return 0;
 }
 
+/* Implementation of linux_target_ops method "get_syscall_trapinfo".  */
+
+static void
+arm_get_syscall_trapinfo (struct regcache *regcache, int *sysno)
+{
+  if (arm_is_thumb_mode ())
+    collect_register_by_name (regcache, "r7", sysno);
+  else
+    {
+      unsigned long pc;
+      unsigned long insn;
+
+      collect_register_by_name (regcache, "pc", &pc);
+
+      if ((*the_target->read_memory) (pc - 4, (unsigned char *) &insn, 4))
+       *sysno = UNKNOWN_SYSCALL;
+      else
+       {
+         unsigned long svc_operand = (0x00ffffff & insn);
+
+         if (svc_operand)
+           {
+             /* OABI */
+             *sysno = svc_operand - 0x900000;
+           }
+         else
+           {
+             /* EABI */
+             collect_register_by_name (regcache, "r7", sysno);
+           }
+       }
+    }
+}
+
 /* Register sets without using PTRACE_GETREGSET.  */
 
 static struct regset_info arm_regsets[] = {
@@ -1020,6 +1061,7 @@ struct linux_target_ops the_low_target = {
   NULL, /* siginfo_fixup */
   arm_new_process,
   arm_new_thread,
+  arm_delete_thread,
   arm_new_fork,
   arm_prepare_to_resume,
   NULL, /* process_qsupported */
@@ -1030,7 +1072,8 @@ struct linux_target_ops the_low_target = {
   NULL, /* get_min_fast_tracepoint_insn_len */
   NULL, /* supports_range_stepping */
   arm_breakpoint_kind_from_current_state,
-  arm_supports_hardware_single_step
+  arm_supports_hardware_single_step,
+  arm_get_syscall_trapinfo,
 };
 
 void