diff options
Diffstat (limited to 'gdb/windows-tdep.c')
| -rw-r--r-- | gdb/windows-tdep.c | 402 |
1 files changed, 402 insertions, 0 deletions
diff --git a/gdb/windows-tdep.c b/gdb/windows-tdep.c index cdf87d1..ba0fba9 100644 --- a/gdb/windows-tdep.c +++ b/gdb/windows-tdep.c @@ -19,6 +19,352 @@ #include "windows-tdep.h" #include "gdb_obstack.h" #include "xml-support.h" +#include "gdbarch.h" +#include "target.h" +#include "value.h" +#include "inferior.h" +#include "command.h" +#include "gdbcmd.h" +#include "gdbthread.h" + +struct cmd_list_element *info_w32_cmdlist; + +typedef struct thread_information_block_32 + { + uint32_t current_seh; /* %fs:0x0000 */ + uint32_t current_top_of_stack; /* %fs:0x0004 */ + uint32_t current_bottom_of_stack; /* %fs:0x0008 */ + uint32_t sub_system_tib; /* %fs:0x000c */ + uint32_t fiber_data; /* %fs:0x0010 */ + uint32_t arbitrary_data_slot; /* %fs:0x0014 */ + uint32_t linear_address_tib; /* %fs:0x0018 */ + uint32_t environment_pointer; /* %fs:0x001c */ + uint32_t process_id; /* %fs:0x0020 */ + uint32_t current_thread_id; /* %fs:0x0024 */ + uint32_t active_rpc_handle; /* %fs:0x0028 */ + uint32_t thread_local_storage; /* %fs:0x002c */ + uint32_t process_environment_block; /* %fs:0x0030 */ + uint32_t last_error_number; /* %fs:0x0034 */ + } +thread_information_32; + +typedef struct thread_information_block_64 + { + uint64_t current_seh; /* %gs:0x0000 */ + uint64_t current_top_of_stack; /* %gs:0x0008 */ + uint64_t current_bottom_of_stack; /* %gs:0x0010 */ + uint64_t sub_system_tib; /* %gs:0x0018 */ + uint64_t fiber_data; /* %gs:0x0020 */ + uint64_t arbitrary_data_slot; /* %gs:0x0028 */ + uint64_t linear_address_tib; /* %gs:0x0030 */ + uint64_t environment_pointer; /* %gs:0x0038 */ + uint64_t process_id; /* %gs:0x0040 */ + uint64_t current_thread_id; /* %gs:0x0048 */ + uint64_t active_rpc_handle; /* %gs:0x0050 */ + uint64_t thread_local_storage; /* %gs:0x0058 */ + uint64_t process_environment_block; /* %gs:0x0060 */ + uint64_t last_error_number; /* %gs:0x0068 */ + } +thread_information_64; + + +static const char* TIB_NAME[] = + { + " current_seh ", /* %fs:0x0000 */ + " current_top_of_stack ", /* %fs:0x0004 */ + " current_bottom_of_stack ", /* %fs:0x0008 */ + " sub_system_tib ", /* %fs:0x000c */ + " fiber_data ", /* %fs:0x0010 */ + " arbitrary_data_slot ", /* %fs:0x0014 */ + " linear_address_tib ", /* %fs:0x0018 */ + " environment_pointer ", /* %fs:0x001c */ + " process_id ", /* %fs:0x0020 */ + " current_thread_id ", /* %fs:0x0024 */ + " active_rpc_handle ", /* %fs:0x0028 */ + " thread_local_storage ", /* %fs:0x002c */ + " process_environment_block ", /* %fs:0x0030 */ + " last_error_number " /* %fs:0x0034 */ + }; + +static const int MAX_TIB32 = sizeof (thread_information_32) / sizeof (uint32_t); +static const int MAX_TIB64 = sizeof (thread_information_64) / sizeof (uint64_t); +static const int FULL_TIB_SIZE = 0x1000; + +static int maint_display_all_tib = 0; + +/* Define Thread Local Base pointer type. */ + +static struct type * +windows_get_tlb_type (struct gdbarch *gdbarch) +{ + struct type *dword_ptr_type, *dword32_type, *void_ptr_type; + struct type *peb_ldr_type, *peb_ldr_ptr_type; + struct type *peb_type, *peb_ptr_type, *list_type, *list_ptr_type; + struct type *module_list_ptr_type; + struct type *tib_type, *seh_type, *tib_ptr_type, *seh_ptr_type; + + dword_ptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch), + 1, "DWORD_PTR"); + dword32_type = arch_integer_type (gdbarch, 32, + 1, "DWORD32"); + void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void); + + /* list entry */ + + list_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); + TYPE_NAME (list_type) = xstrdup ("list"); + + list_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, + TYPE_LENGTH (void_ptr_type), NULL); + + module_list_ptr_type = void_ptr_type; + + append_composite_type_field (list_type, "forward_list", module_list_ptr_type); + append_composite_type_field (list_type, "backward_list", + module_list_ptr_type); + + /* Structured Exception Handler */ + + seh_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); + TYPE_NAME (seh_type) = xstrdup ("seh"); + + seh_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, + TYPE_LENGTH (void_ptr_type), NULL); + TYPE_TARGET_TYPE (seh_ptr_type) = seh_type; + + append_composite_type_field (seh_type, "next_seh", seh_ptr_type); + append_composite_type_field (seh_type, "handler", void_ptr_type); + + /* struct _PEB_LDR_DATA */ + peb_ldr_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); + TYPE_NAME (peb_ldr_type) = xstrdup ("peb_ldr_data"); + + append_composite_type_field (peb_ldr_type, "length", dword32_type); + append_composite_type_field (peb_ldr_type, "initialized", dword32_type); + append_composite_type_field (peb_ldr_type, "ss_handle", void_ptr_type); + append_composite_type_field (peb_ldr_type, "in_load_order", list_type); + append_composite_type_field (peb_ldr_type, "in_memory_order", list_type); + append_composite_type_field (peb_ldr_type, "in_init_order", list_type); + append_composite_type_field (peb_ldr_type, "entry_in_progress", + void_ptr_type); + peb_ldr_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, + TYPE_LENGTH (void_ptr_type), NULL); + TYPE_TARGET_TYPE (peb_ldr_ptr_type) = peb_ldr_type; + + + /* struct process environment block */ + peb_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); + TYPE_NAME (peb_type) = xstrdup ("peb"); + + /* First bytes contain several flags. */ + append_composite_type_field (peb_type, "flags", dword_ptr_type); + append_composite_type_field (peb_type, "mutant", void_ptr_type); + append_composite_type_field (peb_type, "image_base_address", void_ptr_type); + append_composite_type_field (peb_type, "ldr", peb_ldr_ptr_type); + append_composite_type_field (peb_type, "process_parameters", void_ptr_type); + append_composite_type_field (peb_type, "sub_system_data", void_ptr_type); + append_composite_type_field (peb_type, "process_heap", void_ptr_type); + append_composite_type_field (peb_type, "fast_peb_lock", void_ptr_type); + peb_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, + TYPE_LENGTH (void_ptr_type), NULL); + TYPE_TARGET_TYPE (peb_ptr_type) = peb_type; + + + /* struct thread information block */ + tib_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT); + TYPE_NAME (tib_type) = xstrdup ("tib"); + + /* uint32_t current_seh; %fs:0x0000 */ + append_composite_type_field (tib_type, "current_seh", seh_ptr_type); + /* uint32_t current_top_of_stack; %fs:0x0004 */ + append_composite_type_field (tib_type, "current_top_of_stack", void_ptr_type); + /* uint32_t current_bottom_of_stack; %fs:0x0008 */ + append_composite_type_field (tib_type, "current_bottom_of_stack", + void_ptr_type); + /* uint32_t sub_system_tib; %fs:0x000c */ + append_composite_type_field (tib_type, "sub_system_tib", void_ptr_type); + + /* uint32_t fiber_data; %fs:0x0010 */ + append_composite_type_field (tib_type, "fiber_data", void_ptr_type); + /* uint32_t arbitrary_data_slot; %fs:0x0014 */ + append_composite_type_field (tib_type, "arbitrary_data_slot", void_ptr_type); + /* uint32_t linear_address_tib; %fs:0x0018 */ + append_composite_type_field (tib_type, "linear_address_tib", void_ptr_type); + /* uint32_t environment_pointer; %fs:0x001c */ + append_composite_type_field (tib_type, "environment_pointer", void_ptr_type); + /* uint32_t process_id; %fs:0x0020 */ + append_composite_type_field (tib_type, "process_id", dword_ptr_type); + /* uint32_t current_thread_id; %fs:0x0024 */ + append_composite_type_field (tib_type, "thread_id", dword_ptr_type); + /* uint32_t active_rpc_handle; %fs:0x0028 */ + append_composite_type_field (tib_type, "active_rpc_handle", dword_ptr_type); + /* uint32_t thread_local_storage; %fs:0x002c */ + append_composite_type_field (tib_type, "thread_local_storage", void_ptr_type); + /* uint32_t process_environment_block; %fs:0x0030 */ + append_composite_type_field (tib_type, "process_environment_block", + peb_ptr_type); + /* uint32_t last_error_number; %fs:0x0034 */ + append_composite_type_field (tib_type, "last_error_number", dword_ptr_type); + + tib_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR, + TYPE_LENGTH (void_ptr_type), NULL); + TYPE_TARGET_TYPE (tib_ptr_type) = tib_type; + + return tib_ptr_type; +} + +/* The $_tlb convenience variable is a bit special. We don't know + for sure the type of the value until we actually have a chance to + fetch the data. The type can change depending on gdbarch, so it is + also dependent on which thread you have selected. */ + +/* This function implements the lval_computed support for reading a + $_tlb value. */ + +static void +tlb_value_read (struct value *val) +{ + CORE_ADDR tlb; + struct type *type = check_typedef (value_type (val)); + + if (!target_get_tib_address (inferior_ptid, &tlb)) + error (_("Unable to read tlb")); + store_typed_address (value_contents_raw (val), type, tlb); +} + +/* This function implements the lval_computed support for writing a + $_tlb value. */ + +static void +tlb_value_write (struct value *v, struct value *fromval) +{ + error (_("Impossible to change the Thread Local Base")); +} + +static struct lval_funcs tlb_value_funcs = + { + tlb_value_read, + tlb_value_write + }; + + +/* Return a new value with the correct type for the tlb object of + the current thread using architecture GDBARCH. Return a void value + if there's no object available. */ + +static struct value * +tlb_make_value (struct gdbarch *gdbarch, struct internalvar *var) +{ + if (target_has_stack && !ptid_equal (inferior_ptid, null_ptid)) + { + struct type *type = windows_get_tlb_type (gdbarch); + return allocate_computed_value (type, &tlb_value_funcs, NULL); + } + + return allocate_value (builtin_type (gdbarch)->builtin_void); +} + + +/* Display thread information block of a given thread. */ + +static int +display_one_tib (ptid_t ptid) +{ + gdb_byte *tib = NULL; + gdb_byte *index; + CORE_ADDR thread_local_base; + ULONGEST i, val, max, max_name, size, tib_size; + ULONGEST sizeof_ptr = gdbarch_ptr_bit (target_gdbarch); + enum bfd_endian byte_order = gdbarch_byte_order (target_gdbarch); + + if (sizeof_ptr == 64) + { + size = sizeof (uint64_t); + tib_size = sizeof (thread_information_64); + max = MAX_TIB64; + } + else + { + size = sizeof (uint32_t); + tib_size = sizeof (thread_information_32); + max = MAX_TIB32; + } + + max_name = max; + + if (maint_display_all_tib) + { + tib_size = FULL_TIB_SIZE; + max = tib_size / size; + } + + tib = alloca (tib_size); + + if (target_get_tib_address (ptid, &thread_local_base) == 0) + { + printf_filtered (_("Unable to get thread local base for %s\n"), + target_pid_to_str (ptid)); + return -1; + } + + if (target_read (¤t_target, TARGET_OBJECT_MEMORY, + NULL, tib, thread_local_base, tib_size) != tib_size) + { + printf_filtered (_("Unable to read thread information block for %s at \ +address %s\n"), + target_pid_to_str (ptid), + paddress (target_gdbarch, thread_local_base)); + return -1; + } + + printf_filtered (_("Thread Information Block %s at %s\n"), + target_pid_to_str (ptid), + paddress (target_gdbarch, thread_local_base)); + + index = (gdb_byte *) tib; + + /* All fields have the size of a pointer, this allows to iterate + using the same for loop for both layouts. */ + for (i = 0; i < max; i++) + { + val = extract_unsigned_integer (index, size, byte_order); + if (i < max_name) + printf_filtered (_("%s is 0x%s\n"), TIB_NAME[i], phex (val, size)); + else if (val != 0) + printf_filtered (_("TIB[0x%s] is 0x%s\n"), phex (i * size, 2), + phex (val, size)); + index += size; + } + return 1; +} + +/* Display thread information block of a thread specified by ARGS. + If ARGS is empty, display thread information block of current_thread + if current_thread is non NULL. + Otherwise ARGS is parsed and converted to a integer that should + be the windows ThreadID (not the internal GDB thread ID). */ + +static void +display_tib (char * args, int from_tty) +{ + if (args) + { + struct thread_info *tp; + int gdb_id = value_as_long (parse_and_eval (args)); + + tp = find_thread_id (gdb_id); + + if (!tp) + error (_("Thread ID %d not known."), gdb_id); + + if (!target_thread_alive (tp->ptid)) + error (_("Thread ID %d has terminated."), gdb_id); + + display_one_tib (tp->ptid); + } + else if (!ptid_equal (inferior_ptid, null_ptid)) + display_one_tib (inferior_ptid); +} void windows_xfer_shared_library (const char* so_name, CORE_ADDR load_addr, @@ -36,3 +382,59 @@ windows_xfer_shared_library (const char* so_name, CORE_ADDR load_addr, obstack_grow_str (obstack, paddress (gdbarch, load_addr + 0x1000)); obstack_grow_str (obstack, "\"/></library>"); } + +static void +show_maint_show_all_tib (struct ui_file *file, int from_tty, + struct cmd_list_element *c, const char *value) +{ + fprintf_filtered (file, _("Show all non-zero elements of Thread Information \ +Block is %s.\n"), value); +} + +static void +info_w32_command (char *args, int from_tty) +{ + help_list (info_w32_cmdlist, "info w32 ", class_info, gdb_stdout); +} + +static int w32_prefix_command_valid = 0; +void +init_w32_command_list (void) +{ + if (!w32_prefix_command_valid) + { + add_prefix_cmd ("w32", class_info, info_w32_command, + _("Print information specific to Win32 debugging."), + &info_w32_cmdlist, "info w32 ", 0, &infolist); + w32_prefix_command_valid = 1; + } +} + +void +_initialize_windows_tdep (void) +{ + init_w32_command_list (); + add_cmd ("thread-information-block", class_info, display_tib, + _("Display thread information block."), + &info_w32_cmdlist); + add_alias_cmd ("tib", "thread-information-block", class_info, 1, + &info_w32_cmdlist); + + add_setshow_boolean_cmd ("show-all-tib", class_maintenance, + &maint_display_all_tib, _("\ +Set whether to display all non-zero fields of thread information block."), _("\ +Show whether to display all non-zero fields of thread information block."), _("\ +Use \"on\" to enable, \"off\" to disable.\n\ +If enabled, all non-zero fields of thread information block are displayed,\n\ +even if their meaning is unknown."), + NULL, + show_maint_show_all_tib, + &maintenance_set_cmdlist, + &maintenance_show_cmdlist); + + /* Explicitly create without lookup, since that tries to create a + value with a void typed value, and when we get here, gdbarch + isn't initialized yet. At this point, we're quite sure there + isn't another convenience variable of the same name. */ + create_internalvar_type_lazy ("_tlb", tlb_make_value); +} |