1/* nto-tdep.h - QNX Neutrino target header.
2
3   Copyright (C) 2003-2020 Free Software Foundation, Inc.
4
5   Contributed by QNX Software Systems Ltd.
6
7   This file is part of GDB.
8
9   This program is free software; you can redistribute it and/or modify
10   it under the terms of the GNU General Public License as published by
11   the Free Software Foundation; either version 3 of the License, or
12   (at your option) any later version.
13
14   This program is distributed in the hope that it will be useful,
15   but WITHOUT ANY WARRANTY; without even the implied warranty of
16   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
17   GNU General Public License for more details.
18
19   You should have received a copy of the GNU General Public License
20   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
21
22#ifndef NTO_TDEP_H
23#define NTO_TDEP_H
24
25#include "solist.h"
26#include "osabi.h"
27#include "regset.h"
28#include "gdbthread.h"
29
30/* Target operations defined for Neutrino targets (<target>-nto-tdep.c).  */
31
32struct nto_target_ops
33{
34/* The CPUINFO flags from the remote.  Currently used by
35   i386 for fxsave but future proofing other hosts.
36   This is initialized in procfs_attach or nto_start_remote
37   depending on our host/target.  It would only be invalid
38   if we were talking to an older pdebug which didn't support
39   the cpuinfo message.  */
40  unsigned cpuinfo_flags;
41
42/* True if successfully retrieved cpuinfo from remote.  */
43  int cpuinfo_valid;
44
45/* Given a register, return an id that represents the Neutrino
46   regset it came from.  If reg == -1 update all regsets.  */
47  int (*regset_id) (int);
48
49  void (*supply_gregset) (struct regcache *, char *);
50
51  void (*supply_fpregset) (struct regcache *, char *);
52
53  void (*supply_altregset) (struct regcache *, char *);
54
55/* Given a regset, tell gdb about registers stored in data.  */
56  void (*supply_regset) (struct regcache *, int, char *);
57
58/* Given a register and regset, calculate the offset into the regset
59   and stuff it into the last argument.  If regno is -1, calculate the
60   size of the entire regset.  Returns length of data, -1 if unknown
61   regset, 0 if unknown register.  */
62  int (*register_area) (struct gdbarch *, int, int, unsigned *);
63
64/* Build the Neutrino register set info into the data buffer.
65   Return -1 if unknown regset, 0 otherwise.  */
66  int (*regset_fill) (const struct regcache *, int, char *);
67
68/* Gives the fetch_link_map_offsets function exposure outside of
69   solib-svr4.c so that we can override relocate_section_addresses().  */
70  struct link_map_offsets *(*fetch_link_map_offsets) (void);
71
72/* Used by nto_elf_osabi_sniffer to determine if we're connected to an
73   Neutrino target.  */
74  enum gdb_osabi (*is_nto_target) (bfd *abfd);
75};
76
77extern struct nto_target_ops current_nto_target;
78
79#define nto_cpuinfo_flags (current_nto_target.cpuinfo_flags)
80
81#define nto_cpuinfo_valid (current_nto_target.cpuinfo_valid)
82
83#define nto_regset_id (current_nto_target.regset_id)
84
85#define nto_supply_gregset (current_nto_target.supply_gregset)
86
87#define nto_supply_fpregset (current_nto_target.supply_fpregset)
88
89#define nto_supply_altregset (current_nto_target.supply_altregset)
90
91#define nto_supply_regset (current_nto_target.supply_regset)
92
93#define nto_register_area (current_nto_target.register_area)
94
95#define nto_regset_fill (current_nto_target.regset_fill)
96
97#define nto_fetch_link_map_offsets \
98(current_nto_target.fetch_link_map_offsets)
99
100#define nto_is_nto_target (current_nto_target.is_nto_target)
101
102/* Keep this consistant with neutrino syspage.h.  */
103enum
104{
105  CPUTYPE_X86,
106  CPUTYPE_PPC,
107  CPUTYPE_MIPS,
108  CPUTYPE_SPARE,
109  CPUTYPE_ARM,
110  CPUTYPE_SH,
111  CPUTYPE_UNKNOWN
112};
113
114enum
115{
116  OSTYPE_QNX4,
117  OSTYPE_NTO
118};
119
120/* These correspond to the DSMSG_* versions in dsmsgs.h.  */
121enum
122{
123  NTO_REG_GENERAL,
124  NTO_REG_FLOAT,
125  NTO_REG_SYSTEM,
126  NTO_REG_ALT,
127  NTO_REG_END
128};
129
130typedef char qnx_reg64[8];
131
132typedef struct _debug_regs
133{
134  qnx_reg64 padding[1024];
135} nto_regset_t;
136
137struct nto_thread_info : public private_thread_info
138{
139  short tid = 0;
140  unsigned char state = 0;
141  unsigned char flags = 0;
142  std::string name;
143};
144
145static inline nto_thread_info *
146get_nto_thread_info (thread_info *thread)
147{
148  return static_cast<nto_thread_info *> (thread->priv.get ());
149}
150
151/* Per-inferior data, common for both procfs and remote.  */
152struct nto_inferior_data
153{
154  /* Last stopped flags result from wait function */
155  unsigned int stopped_flags = 0;
156
157  /* Last known stopped PC */
158  CORE_ADDR stopped_pc = 0;
159};
160
161/* Generic functions in nto-tdep.c.  */
162
163void nto_init_solib_absolute_prefix (void);
164
165char **nto_parse_redirection (char *start_argv[], const char **in,
166			      const char **out, const char **err);
167
168void nto_relocate_section_addresses (struct so_list *,
169				     struct target_section *);
170
171int nto_map_arch_to_cputype (const char *);
172
173int nto_find_and_open_solib (const char *, unsigned,
174			     gdb::unique_xmalloc_ptr<char> *);
175
176enum gdb_osabi nto_elf_osabi_sniffer (bfd *abfd);
177
178void nto_initialize_signals (void);
179
180/* Dummy function for initializing nto_target_ops on targets which do
181   not define a particular regset.  */
182void nto_dummy_supply_regset (struct regcache *regcache, char *regs);
183
184int nto_in_dynsym_resolve_code (CORE_ADDR pc);
185
186const char *nto_extra_thread_info (struct target_ops *self, struct thread_info *);
187
188LONGEST nto_read_auxv_from_initial_stack (CORE_ADDR inital_stack,
189					  gdb_byte *readbuf,
190					  LONGEST len, size_t sizeof_auxv_t);
191
192struct nto_inferior_data *nto_inferior_data (struct inferior *inf);
193
194#endif /* NTO_TDEP_H */
195