-
-#if defined (PT_IO) && defined (PIOD_READ_AUXV)
-
-/* Read one auxv entry from *READPTR, not reading locations >= ENDPTR.
- Return 0 if *READPTR is already at the end of the buffer.
- Return -1 if there is insufficient buffer for a whole entry.
- Return 1 if an entry was read into *TYPEP and *VALP. */
-
-static int
-inf_ptrace_auxv_parse (struct target_ops *ops, gdb_byte **readptr,
- gdb_byte *endptr, CORE_ADDR *typep, CORE_ADDR *valp)
-{
- struct type *int_type = builtin_type (target_gdbarch ())->builtin_int;
- struct type *ptr_type = builtin_type (target_gdbarch ())->builtin_data_ptr;
- const int sizeof_auxv_type = TYPE_LENGTH (int_type);
- const int sizeof_auxv_val = TYPE_LENGTH (ptr_type);
- enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch ());
- gdb_byte *ptr = *readptr;
-
- if (endptr == ptr)
- return 0;
-
- if (endptr - ptr < 2 * sizeof_auxv_val)
- return -1;
-
- *typep = extract_unsigned_integer (ptr, sizeof_auxv_type, byte_order);
- ptr += sizeof_auxv_val; /* Alignment. */
- *valp = extract_unsigned_integer (ptr, sizeof_auxv_val, byte_order);
- ptr += sizeof_auxv_val;
-
- *readptr = ptr;
- return 1;
-}
-
-#endif
-
-/* Create a prototype ptrace target. The client can override it with
- local methods. */
-
-struct target_ops *
-inf_ptrace_target (void)
-{
- struct target_ops *t = inf_child_target ();
-
- t->to_attach = inf_ptrace_attach;
- t->to_detach = inf_ptrace_detach;
- t->to_resume = inf_ptrace_resume;
- t->to_wait = inf_ptrace_wait;
- t->to_files_info = inf_ptrace_files_info;
- t->to_kill = inf_ptrace_kill;
- t->to_create_inferior = inf_ptrace_create_inferior;
-#ifdef PT_GET_PROCESS_STATE
- t->to_follow_fork = inf_ptrace_follow_fork;
- t->to_post_startup_inferior = inf_ptrace_post_startup_inferior;
- t->to_post_attach = inf_ptrace_post_attach;
-#endif
- t->to_mourn_inferior = inf_ptrace_mourn_inferior;
- t->to_thread_alive = inf_ptrace_thread_alive;
- t->to_pid_to_str = inf_ptrace_pid_to_str;
- t->to_stop = inf_ptrace_stop;
- t->to_xfer_partial = inf_ptrace_xfer_partial;
-#if defined (PT_IO) && defined (PIOD_READ_AUXV)
- t->to_auxv_parse = inf_ptrace_auxv_parse;
-#endif
-
- return t;
-}
-\f
-
-/* Pointer to a function that returns the offset within the user area
- where a particular register is stored. */
-static CORE_ADDR (*inf_ptrace_register_u_offset)(struct gdbarch *, int, int);
-
-/* Fetch register REGNUM from the inferior. */
-
-static void
-inf_ptrace_fetch_register (struct regcache *regcache, int regnum)
-{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
- CORE_ADDR addr;
- size_t size;
- PTRACE_TYPE_RET *buf;
- int pid, i;
-
- /* This isn't really an address, but ptrace thinks of it as one. */
- addr = inf_ptrace_register_u_offset (gdbarch, regnum, 0);
- if (addr == (CORE_ADDR)-1
- || gdbarch_cannot_fetch_register (gdbarch, regnum))
- {
- regcache_raw_supply (regcache, regnum, NULL);
- return;
- }
-
- /* Cater for systems like GNU/Linux, that implement threads as
- separate processes. */
- pid = ptid_get_lwp (inferior_ptid);
- if (pid == 0)
- pid = ptid_get_pid (inferior_ptid);
-
- size = register_size (gdbarch, regnum);
- gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
- buf = alloca (size);
-
- /* Read the register contents from the inferior a chunk at a time. */
- for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
- {
- errno = 0;
- buf[i] = ptrace (PT_READ_U, pid, (PTRACE_TYPE_ARG3)(uintptr_t)addr, 0);
- if (errno != 0)
- error (_("Couldn't read register %s (#%d): %s."),
- gdbarch_register_name (gdbarch, regnum),
- regnum, safe_strerror (errno));
-
- addr += sizeof (PTRACE_TYPE_RET);
- }
- regcache_raw_supply (regcache, regnum, buf);
-}
-
-/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
- for all registers. */
-
-static void
-inf_ptrace_fetch_registers (struct target_ops *ops,
- struct regcache *regcache, int regnum)
-{
- if (regnum == -1)
- for (regnum = 0;
- regnum < gdbarch_num_regs (get_regcache_arch (regcache));
- regnum++)
- inf_ptrace_fetch_register (regcache, regnum);
- else
- inf_ptrace_fetch_register (regcache, regnum);
-}
-
-/* Store register REGNUM into the inferior. */
-
-static void
-inf_ptrace_store_register (const struct regcache *regcache, int regnum)
-{
- struct gdbarch *gdbarch = get_regcache_arch (regcache);
- CORE_ADDR addr;
- size_t size;
- PTRACE_TYPE_RET *buf;
- int pid, i;
-
- /* This isn't really an address, but ptrace thinks of it as one. */
- addr = inf_ptrace_register_u_offset (gdbarch, regnum, 1);
- if (addr == (CORE_ADDR)-1
- || gdbarch_cannot_store_register (gdbarch, regnum))
- return;
-
- /* Cater for systems like GNU/Linux, that implement threads as
- separate processes. */
- pid = ptid_get_lwp (inferior_ptid);
- if (pid == 0)
- pid = ptid_get_pid (inferior_ptid);
-
- size = register_size (gdbarch, regnum);
- gdb_assert ((size % sizeof (PTRACE_TYPE_RET)) == 0);
- buf = alloca (size);
-
- /* Write the register contents into the inferior a chunk at a time. */
- regcache_raw_collect (regcache, regnum, buf);
- for (i = 0; i < size / sizeof (PTRACE_TYPE_RET); i++)
- {
- errno = 0;
- ptrace (PT_WRITE_U, pid, (PTRACE_TYPE_ARG3)(uintptr_t)addr, buf[i]);
- if (errno != 0)
- error (_("Couldn't write register %s (#%d): %s."),
- gdbarch_register_name (gdbarch, regnum),
- regnum, safe_strerror (errno));
-
- addr += sizeof (PTRACE_TYPE_RET);
- }
-}
-
-/* Store register REGNUM back into the inferior. If REGNUM is -1, do
- this for all registers. */
-
-static void
-inf_ptrace_store_registers (struct target_ops *ops,
- struct regcache *regcache, int regnum)
-{
- if (regnum == -1)
- for (regnum = 0;
- regnum < gdbarch_num_regs (get_regcache_arch (regcache));
- regnum++)
- inf_ptrace_store_register (regcache, regnum);
- else
- inf_ptrace_store_register (regcache, regnum);
-}
-
-/* Create a "traditional" ptrace target. REGISTER_U_OFFSET should be
- a function returning the offset within the user area where a
- particular register is stored. */
-
-struct target_ops *
-inf_ptrace_trad_target (CORE_ADDR (*register_u_offset)
- (struct gdbarch *, int, int))
-{
- struct target_ops *t = inf_ptrace_target();
-
- gdb_assert (register_u_offset);
- inf_ptrace_register_u_offset = register_u_offset;
- t->to_fetch_registers = inf_ptrace_fetch_registers;
- t->to_store_registers = inf_ptrace_store_registers;
-
- return t;
-}