gdb/fbsd-nat.h

   1 /* Native-dependent code for FreeBSD.
   2
   3    Copyright (C) 2004-2021 Free Software Foundation, Inc.
   4
   5    This file is part of GDB.
   6
   7    This program is free software; you can redistribute it and/or modify
   8    it under the terms of the GNU General Public License as published by
   9    the Free Software Foundation; either version 3 of the License, or
  10    (at your option) any later version.
  11
  12    This program is distributed in the hope that it will be useful,
  13    but WITHOUT ANY WARRANTY; without even the implied warranty of
  14    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15    GNU General Public License for more details.
  16
  17    You should have received a copy of the GNU General Public License
  18    along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
  19
  20 #ifndef FBSD_NAT_H
  21 #define FBSD_NAT_H
  22
  23 #include "inf-ptrace.h"
  24 #include "regcache.h"
  25 #include "regset.h"
  26 #include <osreldate.h>
  27 #include <sys/proc.h>
  28
  29 /* FreeBSD kernels 11.3 and later report valid si_code values for
  30    SIGTRAP on all architectures.  Older FreeBSD kernels that supported
  31    TRAP_BRKPT did not report valid values for MIPS and sparc64.  Even
  32    older kernels without TRAP_BRKPT support did not report valid
  33    values on any architecture.  */
  34 #if (__FreeBSD_kernel_version >= 1102502) || (__FreeBSD_version >= 1102502)
  35 # define USE_SIGTRAP_SIGINFO
  36 #elif defined(TRAP_BRKPT)
  37 # if !defined(__mips__) && !defined(__sparc64__)
  38 #  define USE_SIGTRAP_SIGINFO
  39 # endif
  40 #endif
  41
  42 /* A prototype FreeBSD target.  */
  43
  44 class fbsd_nat_target : public inf_ptrace_target
  45 {
  46 public:
  47   char *pid_to_exec_file (int pid) override;
  48
  49   int find_memory_regions (find_memory_region_ftype func, void *data) override;
  50
  51   bool info_proc (const char *, enum info_proc_what) override;
  52
  53   enum target_xfer_status xfer_partial (enum target_object object,
  54                                         const char *annex,
  55                                         gdb_byte *readbuf,
  56                                         const gdb_byte *writebuf,
  57                                         ULONGEST offset, ULONGEST len,
  58                                         ULONGEST *xfered_len) override;
  59
  60   bool thread_alive (ptid_t ptid) override;
  61   std::string pid_to_str (ptid_t) override;
  62
  63 #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME
  64   const char *thread_name (struct thread_info *) override;
  65 #endif
  66
  67   void update_thread_list () override;
  68
  69   thread_control_capabilities get_thread_control_capabilities () override
  70   { return tc_schedlock; }
  71
  72   void create_inferior (const char *, const std::string &,
  73                         char **, int) override;
  74
  75   void resume (ptid_t, int, enum gdb_signal) override;
  76
  77   ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override;
  78
  79   void post_startup_inferior (ptid_t) override;
  80   void post_attach (int) override;
  81
  82 #ifdef USE_SIGTRAP_SIGINFO
  83   bool supports_stopped_by_sw_breakpoint () override;
  84   bool stopped_by_sw_breakpoint () override;
  85 #endif
  86
  87 #ifdef TDP_RFPPWAIT
  88   void follow_fork (inferior *, ptid_t, target_waitkind, bool, bool) override;
  89
  90   int insert_fork_catchpoint (int) override;
  91   int remove_fork_catchpoint (int) override;
  92
  93   int insert_vfork_catchpoint (int) override;
  94   int remove_vfork_catchpoint (int) override;
  95 #endif
  96
  97   int insert_exec_catchpoint (int) override;
  98   int remove_exec_catchpoint (int) override;
  99
 100 #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE
 101   int set_syscall_catchpoint (int, bool, int, gdb::array_view<const int>)
 102     override;
 103 #endif
 104
 105   bool supports_multi_process () override;
 106
 107   bool supports_disable_randomization () override;
 108
 109 private:
 110   /* Helper routines for use in fetch_registers and store_registers in
 111      subclasses.  These routines fetch and store a single set of
 112      registers described by REGSET.  The REGSET's 'regmap' field must
 113      point to an array of 'struct regcache_map_entry'.
 114
 115      FETCH_OP is a ptrace operation to fetch the set of registers from
 116      a native thread.  STORE_OP is a ptrace operation to store the set
 117      of registers to a native thread.
 118
 119      The caller must provide storage for the set of registers in REGS,
 120      and SIZE is the size of the storage.  */
 121
 122   void fetch_register_set (struct regcache *regcache, int regnum, int fetch_op,
 123                            const struct regset *regset, void *regs, size_t size);
 124
 125   void store_register_set (struct regcache *regcache, int regnum, int fetch_op,
 126                            int store_op, const struct regset *regset,
 127                            void *regs, size_t size);
 128 protected:
 129   /* Wrapper versions of the above helpers which accept a register set
 130      type such as 'struct reg' or 'struct fpreg'.  */
 131
 132   template <class Regset>
 133   void fetch_register_set (struct regcache *regcache, int regnum, int fetch_op,
 134                            const struct regset *regset)
 135   {
 136     Regset regs;
 137     fetch_register_set (regcache, regnum, fetch_op, regset, &regs,
 138                         sizeof (regs));
 139   }
 140
 141   template <class Regset>
 142   void store_register_set (struct regcache *regcache, int regnum, int fetch_op,
 143                            int store_op, const struct regset *regset)
 144   {
 145     Regset regs;
 146     store_register_set (regcache, regnum, fetch_op, store_op, regset, &regs,
 147                         sizeof (regs));
 148   }
 149 };
 150
 151 #endif /* fbsd-nat.h */