gdbserver/linux-arm-low.cc


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/* GNU/Linux/ARM specific low level interface, for the remote server for GDB.
   Copyright (C) 1995-2024 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 "server.h"
#include "linux-low.h"
#include "arch/arm.h"
#include "arch/arm-linux.h"
#include "arch/arm-get-next-pcs.h"
#include "linux-aarch32-low.h"
#include "linux-aarch32-tdesc.h"
#include "linux-arm-tdesc.h"
#include "gdbsupport/gdb-checked-static-cast.h"

#include <sys/uio.h>
/* Don't include elf.h if linux/elf.h got included by gdb_proc_service.h.
   On Bionic elf.h and linux/elf.h have conflicting definitions.  */
#ifndef ELFMAG0
#include <elf.h>
#endif
#include "nat/gdb_ptrace.h"
#include <signal.h>
#include <sys/syscall.h>

#ifndef PTRACE_GET_THREAD_AREA
#define PTRACE_GET_THREAD_AREA 22
#endif

#ifndef PTRACE_GETWMMXREGS
# define PTRACE_GETWMMXREGS 18
# define PTRACE_SETWMMXREGS 19
#endif

#ifndef PTRACE_GETVFPREGS
# define PTRACE_GETVFPREGS 27
# define PTRACE_SETVFPREGS 28
#endif

#ifndef PTRACE_GETHBPREGS
#define PTRACE_GETHBPREGS 29
#define PTRACE_SETHBPREGS 30
#endif

/* Linux target op definitions for the ARM architecture.  */

class arm_target : public linux_process_target
{
public:

  const regs_info *get_regs_info () override;

  int breakpoint_kind_from_pc (CORE_ADDR *pcptr) override;

  int breakpoint_kind_from_current_state (CORE_ADDR *pcptr) override;

  const gdb_byte *sw_breakpoint_from_kind (int kind, int *size) override;

  bool supports_software_single_step () override;

  bool supports_z_point_type (char z_type) override;

  bool supports_hardware_single_step () 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;

  std::vector<CORE_ADDR> low_get_next_pcs (regcache *regcache) override;

  bool low_breakpoint_at (CORE_ADDR pc) override;

  int low_insert_point (raw_bkpt_type type, CORE_ADDR addr,
			int size, raw_breakpoint *bp) override;

  int low_remove_point (raw_bkpt_type type, CORE_ADDR addr,
			int size, raw_breakpoint *bp) override;

  bool low_stopped_by_watchpoint () override;

  CORE_ADDR low_stopped_data_address () override;

  arch_process_info *low_new_process () override;

  void low_delete_process (arch_process_info *info) override;

  void low_new_thread (lwp_info *) override;

  void low_delete_thread (arch_lwp_info *) override;

  void low_new_fork (process_info *parent, process_info *child) override;

  void low_prepare_to_resume (lwp_info *lwp) override;

  bool low_supports_catch_syscall () override;

  void low_get_syscall_trapinfo (regcache *regcache, int *sysno) override;
};

/* The singleton target ops object.  */

static arm_target the_arm_target;

bool
arm_target::low_supports_breakpoints ()
{
  return true;
}

CORE_ADDR
arm_target::low_get_pc (regcache *regcache)
{
  return linux_get_pc_32bit (regcache);
}

void
arm_target::low_set_pc (regcache *regcache, CORE_ADDR pc)
{
  linux_set_pc_32bit (regcache, pc);
}