binutils-gdb/gdb/windows-tdep.c

468 lines
16 KiB
C

/* Copyright (C) 2008-2012 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 "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)
{
static struct gdbarch *last_gdbarch = NULL;
static struct type *last_tlb_type = NULL;
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;
/* Do not rebuild type if same gdbarch as last time. */
if (last_tlb_type && last_gdbarch == gdbarch)
return last_tlb_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",
builtin_type (gdbarch)->builtin_func_ptr);
/* 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;
last_tlb_type = tib_ptr_type;
last_gdbarch = gdbarch;
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 const 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, void *ignore)
{
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 (&current_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,
struct gdbarch *gdbarch, struct obstack *obstack)
{
char *p;
obstack_grow_str (obstack, "<library name=\"");
p = xml_escape_text (so_name);
obstack_grow_str (obstack, p);
xfree (p);
obstack_grow_str (obstack, "\"><segment address=\"");
/* The symbols in a dll are offset by 0x1000, which is the
offset from 0 of the first byte in an image - because of the file
header and the section alignment. */
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;
}
}
/* Provide a prototype to silence -Wmissing-prototypes. */
extern initialize_file_ftype _initialize_windows_tdep;
/* Implementation of `tlb' variable. */
static const struct internalvar_funcs tlb_funcs =
{
tlb_make_value,
NULL,
NULL
};
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_funcs, NULL);
}