X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdbserver%2Flinux-xtensa-low.cc;h=a666f52e155ec1b41d8e4359852f65a7d1ecf0fb;hb=refs%2Fheads%2Fconcurrent-displaced-stepping-2020-04-01;hp=83af11e11dc7bcba8bb591d2d328c01e11c2ec50;hpb=feacfcacaac9f7e62f467a33c4ae54c56501ed18;p=deliverable%2Fbinutils-gdb.git

diff --git a/gdbserver/linux-xtensa-low.cc b/gdbserver/linux-xtensa-low.cc
index 83af11e11d..a666f52e15 100644
--- a/gdbserver/linux-xtensa-low.cc
+++ b/gdbserver/linux-xtensa-low.cc
@@ -20,6 +20,69 @@
 #include "server.h"
 #include "linux-low.h"
 
+/* Linux target op definitions for the Xtensa architecture.  */
+
+class xtensa_target : public linux_process_target
+{
+public:
+
+  const regs_info *get_regs_info () override;
+
+  const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override;
+
+protected:
+
+  void low_arch_setup () override;
+
+  bool low_cannot_fetch_register (int regno) override;
+
+  bool low_cannot_store_register (int regno) override;
+
+  bool low_supports_breakpoints () override;
+
+  CORE_ADDR low_get_pc (regcache *regcache) override;
+
+  void low_set_pc (regcache *regcache, CORE_ADDR newpc) override;
+
+  bool low_breakpoint_at (CORE_ADDR pc) override;
+};
+
+/* The singleton target ops object.  */
+
+static xtensa_target the_xtensa_target;
+
+bool
+xtensa_target::low_cannot_fetch_register (int regno)
+{
+  gdb_assert_not_reached ("linux target op low_cannot_fetch_register "
+			  "is not implemented by the target");
+}
+
+bool
+xtensa_target::low_cannot_store_register (int regno)
+{
+  gdb_assert_not_reached ("linux target op low_cannot_store_register "
+			  "is not implemented by the target");
+}
+
+bool
+xtensa_target::low_supports_breakpoints ()
+{
+  return true;
+}
+
+CORE_ADDR
+xtensa_target::low_get_pc (regcache *regcache)
+{
+  return linux_get_pc_32bit (regcache);
+}
+
+void
+xtensa_target::low_set_pc (regcache *regcache, CORE_ADDR pc)
+{
+  linux_set_pc_32bit (regcache, pc);
+}
+
 /* Defined in auto-generated file reg-xtensa.c.  */
 void init_registers_xtensa (void);
 extern const struct target_desc *tdesc_xtensa;
@@ -193,22 +256,21 @@ static struct regset_info xtensa_regsets[] = {
 static const gdb_byte xtensa_breakpoint[] = XTENSA_BREAKPOINT;
 #define xtensa_breakpoint_len 2
 
-/* Implementation of linux_target_ops method "sw_breakpoint_from_kind".  */
+/* Implementation of target ops method "sw_breakpoint_from_kind".  */
 
-static const gdb_byte *
-xtensa_sw_breakpoint_from_kind (int kind, int *size)
+const gdb_byte *
+xtensa_target::sw_breakpoint_from_kind (int kind, int *size)
 {
   *size = xtensa_breakpoint_len;
   return xtensa_breakpoint;
 }
 
-static int
-xtensa_breakpoint_at (CORE_ADDR where)
+bool
+xtensa_target::low_breakpoint_at (CORE_ADDR where)
 {
     unsigned long insn;
 
-    (*the_target->read_memory) (where, (unsigned char *) &insn,
-				xtensa_breakpoint_len);
+    read_memory (where, (unsigned char *) &insn, xtensa_breakpoint_len);
     return memcmp((char *) &insn,
 		  xtensa_breakpoint, xtensa_breakpoint_len) == 0;
 }
@@ -239,71 +301,28 @@ static struct regsets_info xtensa_regsets_info =
     NULL, /* disabled_regsets */
   };
 
-static struct regs_info regs_info =
+static struct regs_info myregs_info =
   {
     NULL, /* regset_bitmap */
     NULL, /* usrregs */
     &xtensa_regsets_info
   };
 
-static void
-xtensa_arch_setup (void)
+void
+xtensa_target::low_arch_setup ()
 {
   current_process ()->tdesc = tdesc_xtensa;
 }
 
-/* Support for hardware single step.  */
-
-static int
-xtensa_supports_hardware_single_step (void)
+const regs_info *
+xtensa_target::get_regs_info ()
 {
-  return 1;
+  return &myregs_info;
 }
 
-static const struct regs_info *
-xtensa_regs_info (void)
-{
-  return &regs_info;
-}
-
-struct linux_target_ops the_low_target = {
-  xtensa_arch_setup,
-  xtensa_regs_info,
-  0,
-  0,
-  NULL, /* fetch_register */
-  linux_get_pc_32bit,
-  linux_set_pc_32bit,
-  NULL, /* breakpoint_kind_from_pc */
-  xtensa_sw_breakpoint_from_kind,
-  NULL,
-  0,
-  xtensa_breakpoint_at,
-  NULL, /* supports_z_point_type */
-  NULL, /* insert_point */
-  NULL, /* remove_point */
-  NULL, /* stopped_by_watchpoint */
-  NULL, /* stopped_data_address */
-  NULL, /* collect_ptrace_register */
-  NULL, /* supply_ptrace_register */
-  NULL, /* siginfo_fixup */
-  NULL, /* new_process */
-  NULL, /* delete_process */
-  NULL, /* new_thread */
-  NULL, /* delete_thread */
-  NULL, /* new_fork */
-  NULL, /* prepare_to_resume */
-  NULL, /* process_qsupported */
-  NULL, /* supports_tracepoints */
-  NULL, /* get_thread_area */
-  NULL, /* install_fast_tracepoint_jump_pad */
-  NULL, /* emit_ops */
-  NULL, /* get_min_fast_tracepoint_insn_len */
-  NULL, /* supports_range_stepping */
-  NULL, /* breakpoint_kind_from_current_state */
-  xtensa_supports_hardware_single_step,
-};
+/* The linux target ops object.  */
 
+linux_process_target *the_linux_target = &the_xtensa_target;
 
 void
 initialize_low_arch (void)