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Diffstat (limited to 'gdb/lk-low.c')
| -rw-r--r-- | gdb/lk-low.c | 860 |
1 files changed, 860 insertions, 0 deletions
diff --git a/gdb/lk-low.c b/gdb/lk-low.c new file mode 100644 index 00000000000..a26373b9b92 --- /dev/null +++ b/gdb/lk-low.c @@ -0,0 +1,860 @@ +/* Basic Linux kernel support, architecture independent. + + Copyright (C) 2016 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/>. */ + +#include "defs.h" + +#include "block.h" +#include "exceptions.h" +#include "frame.h" +#include "gdbarch.h" +#include "gdbcore.h" +#include "gdbthread.h" +#include "gdbtypes.h" +#include "inferior.h" +#include "lk-lists.h" +#include "lk-low.h" +#include "objfiles.h" +#include "observer.h" +#include "solib.h" +#include "target.h" +#include "value.h" + +#include <algorithm> + +struct target_ops *linux_kernel_ops = NULL; + +/* Initialize a private data entry for an address, where NAME is the name + of the symbol, i.e. variable name in Linux, ALIAS the name used to + retrieve the entry from hashtab, and SILENT a flag to determine if + errors should be ignored. + + Returns a pointer to the new entry. In case of an error, either returns + NULL (SILENT = TRUE) or throws an error (SILENT = FALSE). If SILENT = TRUE + the caller is responsible to check for errors. + + Do not use directly, use LK_DECLARE_* macros defined in lk-low.h instead. */ + +struct lk_private_data * +lk_init_addr (const char *name, const char *alias, int silent) +{ + /* Initialize to NULL to silence gcc. */ + struct value *val = NULL; + struct lk_private_data *data; + void **new_slot; + void *old_slot; + + if ((old_slot = lk_find (alias)) != NULL) + return (struct lk_private_data *) old_slot; + + TRY + { + /* Choose global block for search, in case the variable was redefined + in the current context. */ + const struct block *global = block_global_block (get_selected_block (0)); + const char *tmp = name; + expression_up expr = parse_exp_1 (&tmp, 0, global, 0); + + gdb_assert (*tmp == '\0'); + val = evaluate_expression (expr.get ()); + } + CATCH (except, RETURN_MASK_ALL) + { + if (!silent) + error (_("Could not find address %s. Aborting."), alias); + + return NULL; + } + END_CATCH + + data = XCNEW (struct lk_private_data); + data->alias = alias; + data->data.addr = value_address (val); + + new_slot = lk_find_slot (alias); + *new_slot = data; + + return data; +} + +/* Same as lk_init_addr but for structs. */ + +struct lk_private_data * +lk_init_struct (const char *name, const char *alias, int silent) +{ + /* Initialize to NULL to silence GCC. */ + struct value *val = NULL; + struct lk_private_data *data; + void **new_slot; + void *old_slot; + + if ((old_slot = lk_find (alias)) != NULL) + return (struct lk_private_data *) old_slot; + + /* There are two ways to define structs + o struct name { ... }; + o typedef struct { ... } name; + Both are used in the linux kernel. Thus we have to check for both ways. + We do this by first searching for "struct name" (the "struct " is added + by macro LK_STRUCT_NAME in lk-low.h) and if not found seach for "name". + + Note: The alias will always keep its "struct "-prefix, even when + given explicitely. Besides some weird error messages this has no effect. + */ +retry: + TRY + { + /* Choose global block for search, in case the struct was redefined + in the current context. */ + const struct block *global = block_global_block(get_selected_block (0)); + const char *tmp = name; + expression_up expr = parse_exp_1 (&tmp, 0, global, 0); + + gdb_assert (*tmp == '\0'); + /* parsing just for 'name' can cause name clashes. Thus also check for + OP_TYPE. */ + if (expr->elts[0].opcode != OP_TYPE) + error ("We just need to get to the catch block"); + + val = evaluate_type (expr.get ()); + } + CATCH (except, RETURN_MASK_ALL) + { + /* 7 = strlen ("struct "). */ + if (strncmp (name, "struct ", 7) == 0) + { + name += 7; + goto retry; + } + + if (!silent) + error (_("Could not find %s. Aborting."), alias); + + return NULL; + } + END_CATCH + + data = XCNEW (struct lk_private_data); + data->alias = alias; + data->data.type = value_type (val); + + new_slot = lk_find_slot (alias); + *new_slot = data; + + return data; +} + +/* Nearly the same as lk_init_addr, with the difference that two names are + needed, i.e. the struct name S_NAME containing the field with name + F_NAME. */ + +struct lk_private_data * +lk_init_field (const char *s_name, const char *f_name, const char *alias, + int silent) +{ + struct lk_private_data *data; + struct lk_private_data *parent; + struct field *first, *last, *field; + void **new_slot; + void *old_slot; + + if ((old_slot = lk_find (alias)) != NULL) + return (struct lk_private_data *) old_slot; + + parent = lk_find (s_name); + if (parent == NULL) + { + parent = lk_init_struct (s_name, s_name, silent); + + /* Only SILENT == true needed, as otherwise lk_init_struct would throw + an error. */ + if (parent == NULL) + return NULL; + } + + first = TYPE_FIELDS (parent->data.type); + last = first + TYPE_NFIELDS (parent->data.type); + for (field = first; field < last; field ++) + { + if (streq (field->name, f_name)) + break; + } + + if (field == last) + { + if (!silent) + error (_("Could not find field %s->%s. Aborting."), s_name, f_name); + return NULL; + } + + data = XCNEW (struct lk_private_data); + data->alias = alias; + data->data.field = field; + + new_slot = lk_find_slot (alias); + *new_slot = data; + + return data; +} + +/* Map cpu number CPU to the original PTID from target beneath. */ + +static ptid_t +lk_cpu_to_old_ptid (const int cpu) +{ + struct lk_ptid_map *ptid_map; + + for (ptid_map = LK_PRIVATE->old_ptid; ptid_map; + ptid_map = ptid_map->next) + { + if (ptid_map->cpu == cpu) + return ptid_map->old_ptid; + } + + error (_("Could not map CPU %d to original PTID. Aborting."), cpu); +} + +/* Helper functions to read and return basic types at a given ADDRess. */ + +/* Read and return the integer value at address ADDR. */ + +int +lk_read_int (CORE_ADDR addr) +{ + size_t int_size = lk_builtin_type_size (int); + enum bfd_endian endian = gdbarch_byte_order (current_inferior ()->gdbarch); + return read_memory_integer (addr, int_size, endian); +} + +/* Read and return the unsigned integer value at address ADDR. */ + +unsigned int +lk_read_uint (CORE_ADDR addr) +{ + size_t uint_size = lk_builtin_type_size (unsigned_int); + enum bfd_endian endian = gdbarch_byte_order (current_inferior ()->gdbarch); + return read_memory_integer (addr, uint_size, endian); +} + +/* Read and return the long integer value at address ADDR. */ + +LONGEST +lk_read_long (CORE_ADDR addr) +{ + size_t long_size = lk_builtin_type_size (long); + enum bfd_endian endian = gdbarch_byte_order (current_inferior ()->gdbarch); + return read_memory_integer (addr, long_size, endian); +} + +/* Read and return the unsigned long integer value at address ADDR. */ + +ULONGEST +lk_read_ulong (CORE_ADDR addr) +{ + size_t ulong_size = lk_builtin_type_size (unsigned_long); + enum bfd_endian endian = gdbarch_byte_order (current_inferior ()->gdbarch); + return read_memory_unsigned_integer (addr, ulong_size, endian); +} + +/* Read and return the address value at address ADDR. */ + +CORE_ADDR +lk_read_addr (CORE_ADDR addr) +{ + return (CORE_ADDR) lk_read_ulong (addr); +} + +/* Reads a bitmap at a given ADDRess of size SIZE (in bits). Allocates and + returns an array of ulongs. The caller is responsible to free the array + after it is no longer needed. */ + +ULONGEST * +lk_read_bitmap (CORE_ADDR addr, size_t size) +{ + ULONGEST *bitmap; + size_t ulong_size, len; + + ulong_size = lk_builtin_type_size (unsigned_long); + len = LK_DIV_ROUND_UP (size, ulong_size * LK_BITS_PER_BYTE); + bitmap = XNEWVEC (ULONGEST, len); + + for (size_t i = 0; i < len; i++) + bitmap[i] = lk_read_ulong (addr + i * ulong_size); + + return bitmap; +} + +/* Return the next set bit in bitmap BITMAP of size SIZE (in bits) + starting from bit (index) BIT. Return SIZE when the end of the bitmap + was reached. To iterate over all set bits use macro + LK_BITMAP_FOR_EACH_SET_BIT defined in lk-low.h. */ + +size_t +lk_bitmap_find_next_bit (ULONGEST *bitmap, size_t size, size_t bit) +{ + size_t ulong_size, bits_per_ulong, elt; + + ulong_size = lk_builtin_type_size (unsigned_long); + bits_per_ulong = ulong_size * LK_BITS_PER_BYTE; + elt = bit / bits_per_ulong; + + while (bit < size) + { + /* FIXME: Explain why using lsb0 bit order. */ + if (bitmap[elt] & (1UL << (bit % bits_per_ulong))) + return bit; + + bit++; + if (bit % bits_per_ulong == 0) + elt++; + } + + return size; +} + +/* Returns the Hamming weight, i.e. number of set bits, of bitmap BITMAP + with size SIZE (in bits). */ + +size_t +lk_bitmap_hweight (ULONGEST *bitmap, size_t size) +{ + size_t ulong_size, bit, bits_per_ulong, elt, retval; + + ulong_size = lk_builtin_type_size (unsigned_long); + bits_per_ulong = ulong_size * LK_BITS_PER_BYTE; + elt = bit = 0; + retval = 0; + + while (bit < size) + { + if (bitmap[elt] & (1 << bit % bits_per_ulong)) + retval++; + + bit++; + if (bit % bits_per_ulong == 0) + elt++; + } + + return retval; +} + +/* Provide the per_cpu_offset of cpu CPU. See comment in lk-low.h for + details. */ + +CORE_ADDR +lk_get_percpu_offset (unsigned int cpu) +{ + size_t ulong_size = lk_builtin_type_size (unsigned_long); + CORE_ADDR percpu_elt; + + /* Give the architecture a chance to overwrite default behaviour. */ + if (LK_HOOK->get_percpu_offset) + return LK_HOOK->get_percpu_offset (cpu); + + percpu_elt = LK_ADDR (__per_cpu_offset) + (ulong_size * cpu); + return lk_read_addr (percpu_elt); +} + + +/* Test if a given task TASK is running. See comment in lk-low.h for + details. */ + +unsigned int +lk_task_running (CORE_ADDR task) +{ + ULONGEST *cpu_online_mask; + size_t size; + unsigned int cpu; + struct cleanup *old_chain; + + size = LK_BITMAP_SIZE (cpumask); + cpu_online_mask = lk_read_bitmap (LK_ADDR (cpu_online_mask), size); + old_chain = make_cleanup (xfree, cpu_online_mask); + + LK_BITMAP_FOR_EACH_SET_BIT (cpu_online_mask, size, cpu) + { + CORE_ADDR rq; + CORE_ADDR curr; + + rq = LK_ADDR (runqueues) + lk_get_percpu_offset (cpu); + curr = lk_read_addr (rq + LK_OFFSET (rq, curr)); + + if (curr == task) + break; + } + + if (cpu == size) + cpu = LK_CPU_INVAL; + + do_cleanups (old_chain); + return cpu; +} + +/* Update running tasks with information from struct rq->curr. */ + +static void +lk_update_running_tasks () +{ + ULONGEST *cpu_online_mask; + size_t size; + unsigned int cpu; + struct cleanup *old_chain; + + size = LK_BITMAP_SIZE (cpumask); + cpu_online_mask = lk_read_bitmap (LK_ADDR (cpu_online_mask), size); + old_chain = make_cleanup (xfree, cpu_online_mask); + + LK_BITMAP_FOR_EACH_SET_BIT (cpu_online_mask, size, cpu) + { + struct thread_info *tp; + CORE_ADDR rq, curr; + LONGEST pid, inf_pid; + ptid_t new_ptid, old_ptid; + + rq = LK_ADDR (runqueues) + lk_get_percpu_offset (cpu); + curr = lk_read_addr (rq + LK_OFFSET (rq, curr)); + pid = lk_read_int (curr + LK_OFFSET (task_struct, pid)); + inf_pid = current_inferior ()->pid; + + new_ptid = ptid_build (inf_pid, pid, curr); + old_ptid = lk_cpu_to_old_ptid (cpu); /* FIXME not suitable for + running targets? */ + + tp = find_thread_ptid (old_ptid); + if (tp && tp->state != THREAD_EXITED) + thread_change_ptid (old_ptid, new_ptid); + } + do_cleanups (old_chain); +} + +/* Update sleeping tasks by walking the task_structs starting from + init_task. */ + +static void +lk_update_sleeping_tasks () +{ + CORE_ADDR init_task, task, thread; + int inf_pid; + + inf_pid = current_inferior ()->pid; + init_task = LK_ADDR (init_task); + + lk_list_for_each_container (task, init_task, task_struct, tasks) + { + lk_list_for_each_container (thread, task, task_struct, thread_group) + { + int pid; + ptid_t ptid; + struct thread_info *tp; + + pid = lk_read_int (thread + LK_OFFSET (task_struct, pid)); + ptid = ptid_build (inf_pid, pid, thread); + + tp = find_thread_ptid (ptid); + if (tp == NULL || tp->state == THREAD_EXITED) + add_thread (ptid); + } + } +} + +/* Function for targets to_update_thread_list hook. */ + +static void +lk_update_thread_list (struct target_ops *target) +{ + prune_threads (); + lk_update_running_tasks (); + lk_update_sleeping_tasks (); +} + +/* Function for targets to_fetch_registers hook. */ + +static void +lk_fetch_registers (struct target_ops *target, + struct regcache *regcache, int regnum) +{ + CORE_ADDR task; + unsigned int cpu; + + task = (CORE_ADDR) ptid_get_tid (inferior_ptid); + cpu = lk_task_running (task); + + /* Let the target beneath fetch registers of running tasks. */ + if (cpu != LK_CPU_INVAL) + { + struct cleanup *old_inferior_ptid; + + old_inferior_ptid = save_inferior_ptid (); + inferior_ptid = lk_cpu_to_old_ptid (cpu); + linux_kernel_ops->beneath->to_fetch_registers (target, regcache, regnum); + do_cleanups (old_inferior_ptid); + } + else + { + struct gdbarch *gdbarch; + unsigned int i; + + LK_HOOK->get_registers (task, target, regcache, regnum); + + /* Mark all registers not found as unavailable. */ + gdbarch = get_regcache_arch (regcache); + for (i = 0; i < gdbarch_num_regs (gdbarch); i++) + { + if (regcache_register_status (regcache, i) == REG_UNKNOWN) + regcache_raw_supply (regcache, i, NULL); + } + } +} + +/* Function for targets to_pid_to_str hook. Marks running tasks with an + asterisk "*". */ + +static char * +lk_pid_to_str (struct target_ops *target, ptid_t ptid) +{ + static char buf[64]; + long pid; + CORE_ADDR task; + + pid = ptid_get_lwp (ptid); + task = (CORE_ADDR) ptid_get_tid (ptid); + + xsnprintf (buf, sizeof (buf), "PID: %5li%s, 0x%s", + pid, ((lk_task_running (task) != LK_CPU_INVAL) ? "*" : ""), + phex (task, lk_builtin_type_size (unsigned_long))); + + return buf; +} + +/* Function for targets to_thread_name hook. */ + +static const char * +lk_thread_name (struct target_ops *target, struct thread_info *ti) +{ + static char buf[LK_TASK_COMM_LEN + 1]; + char tmp[LK_TASK_COMM_LEN + 1]; + CORE_ADDR task, comm; + size_t size; + + size = std::min ((unsigned int) LK_TASK_COMM_LEN, + LK_ARRAY_LEN(LK_FIELD (task_struct, comm))); + + task = (CORE_ADDR) ptid_get_tid (ti->ptid); + comm = task + LK_OFFSET (task_struct, comm); + read_memory (comm, (gdb_byte *) tmp, size); + + xsnprintf (buf, sizeof (buf), "%-16s", tmp); + + return buf; +} + +/* Functions to initialize and free target_ops and its private data. As well + as functions for targets to_open/close/detach hooks. */ + +/* Check if OBFFILE is a Linux kernel. */ + +static int +lk_is_linux_kernel (struct objfile *objfile) +{ + int ok = 0; + + if (objfile == NULL || !(objfile->flags & OBJF_MAINLINE)) + return 0; + + ok += lookup_minimal_symbol ("linux_banner", NULL, objfile).minsym != NULL; + ok += lookup_minimal_symbol ("_stext", NULL, objfile).minsym != NULL; + ok += lookup_minimal_symbol ("_etext", NULL, objfile).minsym != NULL; + + return (ok > 2); +} + +/* Initialize struct lk_private. */ + +static void +lk_init_private () +{ + linux_kernel_ops->to_data = XCNEW (struct lk_private); + LK_PRIVATE->hooks = XCNEW (struct lk_private_hooks); + LK_PRIVATE->data = htab_create_alloc (31, (htab_hash) lk_hash_private_data, + (htab_eq) lk_private_data_eq, NULL, + xcalloc, xfree); +} + +/* Initialize architecture independent private data. Must be called + _after_ symbol tables were initialized. */ + +static void +lk_init_private_data () +{ + if (LK_PRIVATE->data != NULL) + htab_empty (LK_PRIVATE->data); + + LK_DECLARE_FIELD (task_struct, tasks); + LK_DECLARE_FIELD (task_struct, pid); + LK_DECLARE_FIELD (task_struct, tgid); + LK_DECLARE_FIELD (task_struct, thread_group); + LK_DECLARE_FIELD (task_struct, comm); + LK_DECLARE_FIELD (task_struct, thread); + + LK_DECLARE_FIELD (list_head, next); + LK_DECLARE_FIELD (list_head, prev); + + LK_DECLARE_FIELD (rq, curr); + + LK_DECLARE_FIELD (cpumask, bits); + + LK_DECLARE_ADDR (init_task); + LK_DECLARE_ADDR (runqueues); + LK_DECLARE_ADDR (__per_cpu_offset); + LK_DECLARE_ADDR (init_mm); + + LK_DECLARE_ADDR_ALIAS (__cpu_online_mask, cpu_online_mask); /* linux 4.5+ */ + LK_DECLARE_ADDR_ALIAS (cpu_online_bits, cpu_online_mask); /* linux -4.4 */ + if (LK_ADDR (cpu_online_mask) == -1) + error (_("Could not find address cpu_online_mask. Aborting.")); +} + +/* Frees the cpu to old ptid map. */ + +static void +lk_free_ptid_map () +{ + while (LK_PRIVATE->old_ptid) + { + struct lk_ptid_map *tmp; + + tmp = LK_PRIVATE->old_ptid; + LK_PRIVATE->old_ptid = tmp->next; + XDELETE (tmp); + } +} + +/* Initialize the cpu to old ptid map. Prefer the arch dependent + map_running_task_to_cpu hook if provided, else assume that the PID used + by target beneath is the same as in task_struct PID task_struct. See + comment on lk_ptid_map in lk-low.h for details. */ + +static void +lk_init_ptid_map () +{ + struct thread_info *ti; + ULONGEST *cpu_online_mask; + size_t size; + unsigned int cpu; + struct cleanup *old_chain; + + if (LK_PRIVATE->old_ptid != NULL) + lk_free_ptid_map (); + + size = LK_BITMAP_SIZE (cpumask); + cpu_online_mask = lk_read_bitmap (LK_ADDR (cpu_online_mask), size); + old_chain = make_cleanup (xfree, cpu_online_mask); + + ALL_THREADS (ti) + { + struct lk_ptid_map *ptid_map = XCNEW (struct lk_ptid_map); + CORE_ADDR rq, curr; + int pid; + + /* Give the architecture a chance to overwrite default behaviour. */ + if (LK_HOOK->map_running_task_to_cpu) + { + ptid_map->cpu = LK_HOOK->map_running_task_to_cpu (ti); + } + else + { + LK_BITMAP_FOR_EACH_SET_BIT (cpu_online_mask, size, cpu) + { + rq = LK_ADDR (runqueues) + lk_get_percpu_offset (cpu); + curr = lk_read_addr (rq + LK_OFFSET (rq, curr)); + pid = lk_read_int (curr + LK_OFFSET (task_struct, pid)); + + if (pid == ptid_get_lwp (ti->ptid)) + { + ptid_map->cpu = cpu; + break; + } + } + if (cpu == size) + error (_("Could not map thread with pid %d, lwp %lu to a cpu."), + ti->ptid.pid, ti->ptid.lwp); + } + ptid_map->old_ptid = ti->ptid; + ptid_map->next = LK_PRIVATE->old_ptid; + LK_PRIVATE->old_ptid = ptid_map; + } + + do_cleanups (old_chain); +} + +/* Initializes all private data and pushes the linux kernel target, if not + already done. */ + +static void +lk_try_push_target () +{ + struct gdbarch *gdbarch; + + gdbarch = current_inferior ()->gdbarch; + if (!(gdbarch && gdbarch_lk_init_private_p (gdbarch))) + error (_("Linux kernel debugging not supported on %s."), + gdbarch_bfd_arch_info (gdbarch)->printable_name); + + lk_init_private (); + lk_init_private_data (); + gdbarch_lk_init_private (gdbarch); + /* Check for required arch hooks. */ + gdb_assert (LK_HOOK->get_registers); + + lk_init_ptid_map (); + lk_update_thread_list (linux_kernel_ops); + + if (!target_is_pushed (linux_kernel_ops)) + push_target (linux_kernel_ops); +} + +/* Function for targets to_open hook. */ + +static void +lk_open (const char *args, int from_tty) +{ + struct objfile *objfile; + + if (target_is_pushed (linux_kernel_ops)) + { + printf_unfiltered (_("Linux kernel target already pushed. Aborting\n")); + return; + } + + for (objfile = current_program_space->objfiles; objfile; + objfile = objfile->next) + { + if (lk_is_linux_kernel (objfile) + && ptid_get_pid (inferior_ptid) != 0) + { + lk_try_push_target (); + return; + } + } + printf_unfiltered (_("Could not find a valid Linux kernel object file. " + "Aborting.\n")); +} + +/* Function for targets to_close hook. Deletes all private data. */ + +static void +lk_close (struct target_ops *ops) +{ + htab_delete (LK_PRIVATE->data); + lk_free_ptid_map (); + XDELETE (LK_PRIVATE->hooks); + + XDELETE (LK_PRIVATE); + linux_kernel_ops->to_data = NULL; +} + +/* Function for targets to_detach hook. */ + +static void +lk_detach (struct target_ops *t, const char *args, int from_tty) +{ + struct target_ops *beneath = linux_kernel_ops->beneath; + + unpush_target (linux_kernel_ops); + reinit_frame_cache (); + if (from_tty) + printf_filtered (_("Linux kernel target detached.\n")); + + beneath->to_detach (beneath, args, from_tty); +} + +/* Function for new objfile observer. */ + +static void +lk_observer_new_objfile (struct objfile *objfile) +{ + if (lk_is_linux_kernel (objfile) + && ptid_get_pid (inferior_ptid) != 0) + lk_try_push_target (); +} + +/* Function for inferior created observer. */ + +static void +lk_observer_inferior_created (struct target_ops *ops, int from_tty) +{ + struct objfile *objfile; + + if (ptid_get_pid (inferior_ptid) == 0) + return; + + for (objfile = current_inferior ()->pspace->objfiles; objfile; + objfile = objfile->next) + { + if (lk_is_linux_kernel (objfile)) + { + lk_try_push_target (); + return; + } + } +} + +/* Initialize linux kernel target. */ + +static void +init_linux_kernel_ops (void) +{ + struct target_ops *t; + + if (linux_kernel_ops != NULL) + return; + + t = XCNEW (struct target_ops); + t->to_shortname = "linux-kernel"; + t->to_longname = "linux kernel support"; + t->to_doc = "Adds support to debug the Linux kernel"; + + /* set t->to_data = struct lk_private in lk_init_private. */ + + t->to_open = lk_open; + t->to_close = lk_close; + t->to_detach = lk_detach; + t->to_fetch_registers = lk_fetch_registers; + t->to_update_thread_list = lk_update_thread_list; + t->to_pid_to_str = lk_pid_to_str; + t->to_thread_name = lk_thread_name; + + t->to_stratum = thread_stratum; + t->to_magic = OPS_MAGIC; + + linux_kernel_ops = t; + + add_target (t); +} + +/* Provide a prototype to silence -Wmissing-prototypes. */ +extern initialize_file_ftype _initialize_linux_kernel; + +void +_initialize_linux_kernel (void) +{ + init_linux_kernel_ops (); + + observer_attach_new_objfile (lk_observer_new_objfile); + observer_attach_inferior_created (lk_observer_inferior_created); +} |