gdb/nto-tdep.h

   1 /* nto-tdep.h - QNX Neutrino target header.
   2
   3    Copyright (C) 2003-2022 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
  32 struct 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
  77 extern 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.  */
 103 enum
 104 {
 105   CPUTYPE_X86,
 106   CPUTYPE_PPC,
 107   CPUTYPE_MIPS,
 108   CPUTYPE_SPARE,
 109   CPUTYPE_ARM,
 110   CPUTYPE_SH,
 111   CPUTYPE_UNKNOWN
 112 };
 113
 114 enum
 115 {
 116   OSTYPE_QNX4,
 117   OSTYPE_NTO
 118 };
 119
 120 /* These correspond to the DSMSG_* versions in dsmsgs.h.  */
 121 enum
 122 {
 123   NTO_REG_GENERAL,
 124   NTO_REG_FLOAT,
 125   NTO_REG_SYSTEM,
 126   NTO_REG_ALT,
 127   NTO_REG_END
 128 };
 129
 130 typedef char qnx_reg64[8];
 131
 132 typedef struct _debug_regs
 133 {
 134   qnx_reg64 padding[1024];
 135 } nto_regset_t;
 136
 137 struct 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
 145 static inline nto_thread_info *
 146 get_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.  */
 152 struct 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
 163 void nto_init_solib_absolute_prefix (void);
 164
 165 char **nto_parse_redirection (char *start_argv[], const char **in,
 166                               const char **out, const char **err);
 167
 168 void nto_relocate_section_addresses (struct so_list *,
 169                                      struct target_section *);
 170
 171 int nto_map_arch_to_cputype (const char *);
 172
 173 int nto_find_and_open_solib (const char *, unsigned,
 174                              gdb::unique_xmalloc_ptr<char> *);
 175
 176 enum gdb_osabi nto_elf_osabi_sniffer (bfd *abfd);
 177
 178 void nto_initialize_signals (void);
 179
 180 /* Dummy function for initializing nto_target_ops on targets which do
 181    not define a particular regset.  */
 182 void nto_dummy_supply_regset (struct regcache *regcache, char *regs);
 183
 184 int nto_in_dynsym_resolve_code (CORE_ADDR pc);
 185
 186 const char *nto_extra_thread_info (struct target_ops *self, struct thread_info *);
 187
 188 LONGEST nto_read_auxv_from_initial_stack (CORE_ADDR inital_stack,
 189                                           gdb_byte *readbuf,
 190                                           LONGEST len, size_t sizeof_auxv_t);
 191
 192 struct nto_inferior_data *nto_inferior_data (struct inferior *inf);
 193
 194 #endif /* NTO_TDEP_H */