aboutsummaryrefslogtreecommitdiff
path: root/gdbserver/win32-low.h
blob: 58bb105b283e73d51997b657f0d827bd92eb5739 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
/* Internal interfaces for the Win32 specific target code for gdbserver.
   Copyright (C) 2007-2022 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/>.  */

#ifndef GDBSERVER_WIN32_LOW_H
#define GDBSERVER_WIN32_LOW_H

#include <windows.h>
#include "nat/windows-nat.h"

struct target_desc;

/* The inferior's target description.  This is a global because the
   Windows ports support neither bi-arch nor multi-process.  */
extern const struct target_desc *win32_tdesc;
#ifdef __x86_64__
extern const struct target_desc *wow64_win32_tdesc;
#endif

struct win32_target_ops
{
  /* Architecture-specific setup.  */
  void (*arch_setup) (void);

  /* The number of target registers.  */
  int (*num_regs) (void);

  /* Perform initializations on startup.  */
  void (*initial_stuff) (void);

  /* Fetch the context from the inferior.  */
  void (*get_thread_context) (windows_nat::windows_thread_info *th);

  /* Called just before resuming the thread.  */
  void (*prepare_to_resume) (windows_nat::windows_thread_info *th);

  /* Called when a thread was added.  */
  void (*thread_added) (windows_nat::windows_thread_info *th);

  /* Fetch register from gdbserver regcache data.  */
  void (*fetch_inferior_register) (struct regcache *regcache,
				   windows_nat::windows_thread_info *th,
				   int r);

  /* Store a new register value into the thread context of TH.  */
  void (*store_inferior_register) (struct regcache *regcache,
				   windows_nat::windows_thread_info *th,
				   int r);

  void (*single_step) (windows_nat::windows_thread_info *th);

  const unsigned char *breakpoint;
  int breakpoint_len;

  /* Amount by which to decrement the PC after a breakpoint is
     hit.  */
  int decr_pc_after_break;

  /* Get the PC register from REGCACHE.  */
  CORE_ADDR (*get_pc) (struct regcache *regcache);
  /* Set the PC register in REGCACHE.  */
  void (*set_pc) (struct regcache *regcache, CORE_ADDR newpc);

  /* Breakpoint/Watchpoint related functions.  See target.h for comments.  */
  int (*supports_z_point_type) (char z_type);
  int (*insert_point) (enum raw_bkpt_type type, CORE_ADDR addr,
		       int size, struct raw_breakpoint *bp);
  int (*remove_point) (enum raw_bkpt_type type, CORE_ADDR addr,
		       int size, struct raw_breakpoint *bp);
  int (*stopped_by_watchpoint) (void);
  CORE_ADDR (*stopped_data_address) (void);
};

extern struct win32_target_ops the_low_target;

/* Target ops definitions for a Win32 target.  */

class win32_process_target : public process_stratum_target
{
public:

  int create_inferior (const char *program,
		       const std::vector<char *> &program_args) override;

  int attach (unsigned long pid) override;

  int kill (process_info *proc) override;

  int detach (process_info *proc) override;

  void mourn (process_info *proc) override;

  void join (int pid) override;

  bool thread_alive (ptid_t pid) override;

  void resume (thread_resume *resume_info, size_t n) override;

  ptid_t wait (ptid_t ptid, target_waitstatus *status,
	       target_wait_flags options) override;

  void fetch_registers (regcache *regcache, int regno) override;

  void store_registers (regcache *regcache, int regno) override;

  int read_memory (CORE_ADDR memaddr, unsigned char *myaddr,
		   int len) override;

  int write_memory (CORE_ADDR memaddr, const unsigned char *myaddr,
		    int len) override;

  void request_interrupt () override;

  bool supports_z_point_type (char z_type) override;

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

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

  bool supports_hardware_single_step () override;

  bool stopped_by_watchpoint () override;

  CORE_ADDR stopped_data_address () override;

  bool supports_qxfer_siginfo () override;

  int qxfer_siginfo (const char *annex, unsigned char *readbuf,
		     unsigned const char *writebuf,
		     CORE_ADDR offset, int len) override;

  bool supports_get_tib_address () override;

  int get_tib_address (ptid_t ptid, CORE_ADDR *addr) override;

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

  CORE_ADDR read_pc (regcache *regcache) override;

  void write_pc (regcache *regcache, CORE_ADDR pc) override;

  bool stopped_by_sw_breakpoint () override;

  bool supports_stopped_by_sw_breakpoint () override;

  const char *thread_name (ptid_t thread) override;

  bool supports_pid_to_exec_file () override
  { return true; }

  const char *pid_to_exec_file (int pid) override;

  bool supports_disable_randomization () override
  {
    return windows_nat::disable_randomization_available ();
  }
};

struct gdbserver_windows_process : public windows_nat::windows_process_info
{
  windows_nat::windows_thread_info *thread_rec
       (ptid_t ptid,
	windows_nat::thread_disposition_type disposition) override;
  int handle_output_debug_string (struct target_waitstatus *ourstatus) override;
  void handle_load_dll (const char *dll_name, LPVOID base) override;
  void handle_unload_dll () override;
  bool handle_access_violation (const EXCEPTION_RECORD *rec) override;

  int attaching = 0;

  /* A status that hasn't been reported to the core yet, and so
     win32_wait should return it next, instead of fetching the next
     debug event off the win32 API.  */
  struct target_waitstatus cached_status;

  /* Non zero if an interrupt request is to be satisfied by suspending
     all threads.  */
  int soft_interrupt_requested = 0;

  /* Non zero if the inferior is stopped in a simulated breakpoint done
     by suspending all the threads.  */
  int faked_breakpoint = 0;

  /* True if current_process_handle needs to be closed.  */
  bool open_process_used = false;

  /* Zero during the child initialization phase, and nonzero
     otherwise.  */
  int child_initialization_done = 0;
};

/* The sole Windows process.  */
extern gdbserver_windows_process windows_process;

/* Retrieve the context for this thread, if not already retrieved.  */
extern void win32_require_context (windows_nat::windows_thread_info *th);

/* Map the Windows error number in ERROR to a locale-dependent error
   message string and return a pointer to it.  Typically, the values
   for ERROR come from GetLastError.

   The string pointed to shall not be modified by the application,
   but may be overwritten by a subsequent call to strwinerror

   The strwinerror function does not change the current setting
   of GetLastError.  */
extern char * strwinerror (DWORD error);

#endif /* GDBSERVER_WIN32_LOW_H */