gdb/nto-tdep.h

   1 /* nto-tdep.h - QNX Neutrino target header.
   2
   3    Copyright (C) 2003-2023 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 #include "gdbsupport/gdb-checked-static-cast.h"
  30
  31 /* Target operations defined for Neutrino targets (<target>-nto-tdep.c).  */
  32
  33 struct nto_target_ops
  34 {
  35 /* The CPUINFO flags from the remote.  Currently used by
  36    i386 for fxsave but future proofing other hosts.
  37    This is initialized in procfs_attach or nto_start_remote
  38    depending on our host/target.  It would only be invalid
  39    if we were talking to an older pdebug which didn't support
  40    the cpuinfo message.  */
  41   unsigned cpuinfo_flags;
  42
  43 /* True if successfully retrieved cpuinfo from remote.  */
  44   int cpuinfo_valid;
  45
  46 /* Given a register, return an id that represents the Neutrino
  47    regset it came from.  If reg == -1 update all regsets.  */
  48   int (*regset_id) (int);
  49
  50   void (*supply_gregset) (struct regcache *, char *);
  51
  52   void (*supply_fpregset) (struct regcache *, char *);
  53
  54   void (*supply_altregset) (struct regcache *, char *);
  55
  56 /* Given a regset, tell gdb about registers stored in data.  */
  57   void (*supply_regset) (struct regcache *, int, char *);
  58
  59 /* Given a register and regset, calculate the offset into the regset
  60    and stuff it into the last argument.  If regno is -1, calculate the
  61    size of the entire regset.  Returns length of data, -1 if unknown
  62    regset, 0 if unknown register.  */
  63   int (*register_area) (struct gdbarch *, int, int, unsigned *);
  64
  65 /* Build the Neutrino register set info into the data buffer.
  66    Return -1 if unknown regset, 0 otherwise.  */
  67   int (*regset_fill) (const struct regcache *, int, char *);
  68
  69 /* Gives the fetch_link_map_offsets function exposure outside of
  70    solib-svr4.c so that we can override relocate_section_addresses().  */
  71   struct link_map_offsets *(*fetch_link_map_offsets) (void);
  72
  73 /* Used by nto_elf_osabi_sniffer to determine if we're connected to an
  74    Neutrino target.  */
  75   enum gdb_osabi (*is_nto_target) (bfd *abfd);
  76 };
  77
  78 extern struct nto_target_ops current_nto_target;
  79
  80 #define nto_cpuinfo_flags (current_nto_target.cpuinfo_flags)
  81
  82 #define nto_cpuinfo_valid (current_nto_target.cpuinfo_valid)
  83
  84 #define nto_regset_id (current_nto_target.regset_id)
  85
  86 #define nto_supply_gregset (current_nto_target.supply_gregset)
  87
  88 #define nto_supply_fpregset (current_nto_target.supply_fpregset)
  89
  90 #define nto_supply_altregset (current_nto_target.supply_altregset)
  91
  92 #define nto_supply_regset (current_nto_target.supply_regset)
  93
  94 #define nto_register_area (current_nto_target.register_area)
  95
  96 #define nto_regset_fill (current_nto_target.regset_fill)
  97
  98 #define nto_fetch_link_map_offsets \
  99 (current_nto_target.fetch_link_map_offsets)
 100
 101 #define nto_is_nto_target (current_nto_target.is_nto_target)
 102
 103 /* Keep this consistant with neutrino syspage.h.  */
 104 enum
 105 {
 106   CPUTYPE_X86,
 107   CPUTYPE_PPC,
 108   CPUTYPE_MIPS,
 109   CPUTYPE_SPARE,
 110   CPUTYPE_ARM,
 111   CPUTYPE_SH,
 112   CPUTYPE_UNKNOWN
 113 };
 114
 115 enum
 116 {
 117   OSTYPE_QNX4,
 118   OSTYPE_NTO
 119 };
 120
 121 /* These correspond to the DSMSG_* versions in dsmsgs.h.  */
 122 enum
 123 {
 124   NTO_REG_GENERAL,
 125   NTO_REG_FLOAT,
 126   NTO_REG_SYSTEM,
 127   NTO_REG_ALT,
 128   NTO_REG_END
 129 };
 130
 131 typedef char qnx_reg64[8];
 132
 133 typedef struct _debug_regs
 134 {
 135   qnx_reg64 padding[1024];
 136 } nto_regset_t;
 137
 138 struct nto_thread_info : public private_thread_info
 139 {
 140   short tid = 0;
 141   unsigned char state = 0;
 142   unsigned char flags = 0;
 143   std::string name;
 144 };
 145
 146 static inline nto_thread_info *
 147 get_nto_thread_info (thread_info *thread)
 148 {
 149   return gdb::checked_static_cast<nto_thread_info *> (thread->priv.get ());
 150 }
 151
 152 /* Per-inferior data, common for both procfs and remote.  */
 153 struct nto_inferior_data
 154 {
 155   /* Last stopped flags result from wait function */
 156   unsigned int stopped_flags = 0;
 157
 158   /* Last known stopped PC */
 159   CORE_ADDR stopped_pc = 0;
 160 };
 161
 162 /* Generic functions in nto-tdep.c.  */
 163
 164 void nto_init_solib_absolute_prefix (void);
 165
 166 char **nto_parse_redirection (char *start_argv[], const char **in,
 167                               const char **out, const char **err);
 168
 169 void nto_relocate_section_addresses (shobj &, 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 initial_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 */