1 /* Native-dependent code for FreeBSD.
3 Copyright (C) 2004-2022 Free Software Foundation, Inc.
5 This file is part of GDB.
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.
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.
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/>. */
23 #include "inf-ptrace.h"
26 #include <osreldate.h>
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
42 /* A prototype FreeBSD target. */
44 class fbsd_nat_target
: public inf_ptrace_target
47 char *pid_to_exec_file (int pid
) override
;
49 int find_memory_regions (find_memory_region_ftype func
, void *data
) override
;
51 bool info_proc (const char *, enum info_proc_what
) override
;
53 enum target_xfer_status
xfer_partial (enum target_object object
,
56 const gdb_byte
*writebuf
,
57 ULONGEST offset
, ULONGEST len
,
58 ULONGEST
*xfered_len
) override
;
60 bool thread_alive (ptid_t ptid
) override
;
61 std::string
pid_to_str (ptid_t
) override
;
63 #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_TDNAME
64 const char *thread_name (struct thread_info
*) override
;
67 void update_thread_list () override
;
69 bool can_async_p () override
;
71 void async (int) override
;
73 thread_control_capabilities
get_thread_control_capabilities () override
74 { return tc_schedlock
; }
76 void create_inferior (const char *, const std::string
&,
77 char **, int) override
;
79 void resume (ptid_t
, int, enum gdb_signal
) override
;
81 ptid_t
wait (ptid_t
, struct target_waitstatus
*, target_wait_flags
) override
;
83 void post_attach (int) override
;
85 #ifdef USE_SIGTRAP_SIGINFO
86 bool supports_stopped_by_sw_breakpoint () override
;
87 bool stopped_by_sw_breakpoint () override
;
91 void follow_fork (inferior
*, ptid_t
, target_waitkind
, bool, bool) override
;
93 int insert_fork_catchpoint (int) override
;
94 int remove_fork_catchpoint (int) override
;
96 int insert_vfork_catchpoint (int) override
;
97 int remove_vfork_catchpoint (int) override
;
100 int insert_exec_catchpoint (int) override
;
101 int remove_exec_catchpoint (int) override
;
103 #ifdef HAVE_STRUCT_PTRACE_LWPINFO_PL_SYSCALL_CODE
104 int set_syscall_catchpoint (int, bool, int, gdb::array_view
<const int>)
108 bool supports_multi_process () override
;
110 bool supports_disable_randomization () override
;
112 /* Methods meant to be overridden by arch-specific target
115 virtual void low_new_fork (ptid_t parent
, pid_t child
)
118 /* The method to call, if any, when a thread is destroyed. */
119 virtual void low_delete_thread (thread_info
*)
124 void post_startup_inferior (ptid_t
) override
;
127 ptid_t
wait_1 (ptid_t
, struct target_waitstatus
*, target_wait_flags
);
129 /* Helper routines for use in fetch_registers and store_registers in
130 subclasses. These routines fetch and store a single set of
131 registers described by REGSET. The REGSET's 'regmap' field must
132 point to an array of 'struct regcache_map_entry'.
134 FETCH_OP is a ptrace operation to fetch the set of registers from
135 a native thread. STORE_OP is a ptrace operation to store the set
136 of registers to a native thread.
138 The caller must provide storage for the set of registers in REGS,
139 and SIZE is the size of the storage.
141 Returns true if the register set was transferred due to a
144 bool fetch_register_set (struct regcache
*regcache
, int regnum
, int fetch_op
,
145 const struct regset
*regset
, void *regs
, size_t size
);
147 bool store_register_set (struct regcache
*regcache
, int regnum
, int fetch_op
,
148 int store_op
, const struct regset
*regset
,
149 void *regs
, size_t size
);
151 /* Wrapper versions of the above helpers which accept a register set
152 type such as 'struct reg' or 'struct fpreg'. */
154 template <class Regset
>
155 bool fetch_register_set (struct regcache
*regcache
, int regnum
, int fetch_op
,
156 const struct regset
*regset
)
159 return fetch_register_set (regcache
, regnum
, fetch_op
, regset
, ®s
,
163 template <class Regset
>
164 bool store_register_set (struct regcache
*regcache
, int regnum
, int fetch_op
,
165 int store_op
, const struct regset
*regset
)
168 return store_register_set (regcache
, regnum
, fetch_op
, store_op
, regset
,
169 ®s
, sizeof (regs
));
173 /* Fetch the signal information for PTID and store it in *SIGINFO.
174 Return true if successful. */
175 bool fbsd_nat_get_siginfo (ptid_t ptid
, siginfo_t
*siginfo
);
177 #endif /* fbsd-nat.h */