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- /* Copyright (C) 2008-2022 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 "gdbsupport/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"
- #include "objfiles.h"
- #include "symfile.h"
- #include "coff-pe-read.h"
- #include "gdb_bfd.h"
- #include "solib.h"
- #include "solib-target.h"
- #include "gdbcore.h"
- #include "coff/internal.h"
- #include "libcoff.h"
- #include "solist.h"
- #define CYGWIN_DLL_NAME "cygwin1.dll"
- /* Windows signal numbers differ between MinGW flavors and between
- those and Cygwin. The below enumerations were gleaned from the
- respective headers. */
- /* Signal numbers for the various MinGW flavors. The ones marked with
- MinGW-w64 are defined by MinGW-w64, not by mingw.org's MinGW. */
- enum
- {
- WINDOWS_SIGHUP = 1, /* MinGW-w64 */
- WINDOWS_SIGINT = 2,
- WINDOWS_SIGQUIT = 3, /* MinGW-w64 */
- WINDOWS_SIGILL = 4,
- WINDOWS_SIGTRAP = 5, /* MinGW-w64 */
- WINDOWS_SIGIOT = 6, /* MinGW-w64 */
- WINDOWS_SIGEMT = 7, /* MinGW-w64 */
- WINDOWS_SIGFPE = 8,
- WINDOWS_SIGKILL = 9, /* MinGW-w64 */
- WINDOWS_SIGBUS = 10, /* MinGW-w64 */
- WINDOWS_SIGSEGV = 11,
- WINDOWS_SIGSYS = 12, /* MinGW-w64 */
- WINDOWS_SIGPIPE = 13, /* MinGW-w64 */
- WINDOWS_SIGALRM = 14, /* MinGW-w64 */
- WINDOWS_SIGTERM = 15,
- WINDOWS_SIGBREAK = 21,
- WINDOWS_SIGABRT = 22,
- };
- /* Signal numbers for Cygwin. */
- enum
- {
- CYGWIN_SIGHUP = 1,
- CYGWIN_SIGINT = 2,
- CYGWIN_SIGQUIT = 3,
- CYGWIN_SIGILL = 4,
- CYGWIN_SIGTRAP = 5,
- CYGWIN_SIGABRT = 6,
- CYGWIN_SIGEMT = 7,
- CYGWIN_SIGFPE = 8,
- CYGWIN_SIGKILL = 9,
- CYGWIN_SIGBUS = 10,
- CYGWIN_SIGSEGV = 11,
- CYGWIN_SIGSYS = 12,
- CYGWIN_SIGPIPE = 13,
- CYGWIN_SIGALRM = 14,
- CYGWIN_SIGTERM = 15,
- CYGWIN_SIGURG = 16,
- CYGWIN_SIGSTOP = 17,
- CYGWIN_SIGTSTP = 18,
- CYGWIN_SIGCONT = 19,
- CYGWIN_SIGCHLD = 20,
- CYGWIN_SIGTTIN = 21,
- CYGWIN_SIGTTOU = 22,
- CYGWIN_SIGIO = 23,
- CYGWIN_SIGXCPU = 24,
- CYGWIN_SIGXFSZ = 25,
- CYGWIN_SIGVTALRM = 26,
- CYGWIN_SIGPROF = 27,
- CYGWIN_SIGWINCH = 28,
- CYGWIN_SIGLOST = 29,
- CYGWIN_SIGUSR1 = 30,
- CYGWIN_SIGUSR2 = 31,
- };
- /* These constants are defined by Cygwin's core_dump.h */
- static constexpr unsigned int NOTE_INFO_MODULE = 3;
- static constexpr unsigned int NOTE_INFO_MODULE64 = 4;
- 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 bool maint_display_all_tib = false;
- static struct gdbarch_data *windows_gdbarch_data_handle;
- struct windows_gdbarch_data
- {
- struct type *siginfo_type;
- struct type *tib_ptr_type; /* Type of thread information block */
- };
- /* Allocate windows_gdbarch_data for an arch. */
- static void *
- init_windows_gdbarch_data (struct gdbarch *gdbarch)
- {
- return GDBARCH_OBSTACK_ZALLOC (gdbarch, struct windows_gdbarch_data);
- }
- /* Get windows_gdbarch_data of an arch. */
- static struct windows_gdbarch_data *
- get_windows_gdbarch_data (struct gdbarch *gdbarch)
- {
- return ((struct windows_gdbarch_data *)
- gdbarch_data (gdbarch, windows_gdbarch_data_handle));
- }
- /* 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;
- struct type *module_list_ptr_type;
- struct type *tib_type, *seh_type, *tib_ptr_type, *seh_ptr_type;
- struct type *word_type, *wchar_type, *wchar_ptr_type;
- struct type *uni_str_type, *rupp_type, *rupp_ptr_type;
- windows_gdbarch_data *windows_gdbarch_data
- = get_windows_gdbarch_data (gdbarch);
- if (windows_gdbarch_data->tib_ptr_type != nullptr)
- return windows_gdbarch_data->tib_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");
- word_type = arch_integer_type (gdbarch, 16,
- 1, "WORD");
- wchar_type = arch_integer_type (gdbarch, 16,
- 1, "wchar_t");
- void_ptr_type = lookup_pointer_type (builtin_type (gdbarch)->builtin_void);
- wchar_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
- NULL, wchar_type);
- /* list entry */
- list_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
- list_type->set_name (xstrdup ("list"));
- 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);
- seh_type->set_name (xstrdup ("seh"));
- seh_ptr_type = arch_type (gdbarch, TYPE_CODE_PTR,
- TYPE_LENGTH (void_ptr_type) * TARGET_CHAR_BIT,
- 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);
- peb_ldr_type->set_name (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) * TARGET_CHAR_BIT,
- NULL);
- TYPE_TARGET_TYPE (peb_ldr_ptr_type) = peb_ldr_type;
- /* struct UNICODE_STRING */
- uni_str_type = arch_composite_type (gdbarch, "unicode_string",
- TYPE_CODE_STRUCT);
- append_composite_type_field (uni_str_type, "length", word_type);
- append_composite_type_field (uni_str_type, "maximum_length", word_type);
- append_composite_type_field_aligned (uni_str_type, "buffer",
- wchar_ptr_type,
- TYPE_LENGTH (wchar_ptr_type));
- /* struct _RTL_USER_PROCESS_PARAMETERS */
- rupp_type = arch_composite_type (gdbarch, "rtl_user_process_parameters",
- TYPE_CODE_STRUCT);
- append_composite_type_field (rupp_type, "maximum_length", dword32_type);
- append_composite_type_field (rupp_type, "length", dword32_type);
- append_composite_type_field (rupp_type, "flags", dword32_type);
- append_composite_type_field (rupp_type, "debug_flags", dword32_type);
- append_composite_type_field (rupp_type, "console_handle", void_ptr_type);
- append_composite_type_field (rupp_type, "console_flags", dword32_type);
- append_composite_type_field_aligned (rupp_type, "standard_input",
- void_ptr_type,
- TYPE_LENGTH (void_ptr_type));
- append_composite_type_field (rupp_type, "standard_output", void_ptr_type);
- append_composite_type_field (rupp_type, "standard_error", void_ptr_type);
- append_composite_type_field (rupp_type, "current_directory", uni_str_type);
- append_composite_type_field (rupp_type, "current_directory_handle",
- void_ptr_type);
- append_composite_type_field (rupp_type, "dll_path", uni_str_type);
- append_composite_type_field (rupp_type, "image_path_name", uni_str_type);
- append_composite_type_field (rupp_type, "command_line", uni_str_type);
- append_composite_type_field (rupp_type, "environment", void_ptr_type);
- append_composite_type_field (rupp_type, "starting_x", dword32_type);
- append_composite_type_field (rupp_type, "starting_y", dword32_type);
- append_composite_type_field (rupp_type, "count_x", dword32_type);
- append_composite_type_field (rupp_type, "count_y", dword32_type);
- append_composite_type_field (rupp_type, "count_chars_x", dword32_type);
- append_composite_type_field (rupp_type, "count_chars_y", dword32_type);
- append_composite_type_field (rupp_type, "fill_attribute", dword32_type);
- append_composite_type_field (rupp_type, "window_flags", dword32_type);
- append_composite_type_field (rupp_type, "show_window_flags", dword32_type);
- append_composite_type_field_aligned (rupp_type, "window_title",
- uni_str_type,
- TYPE_LENGTH (void_ptr_type));
- append_composite_type_field (rupp_type, "desktop_info", uni_str_type);
- append_composite_type_field (rupp_type, "shell_info", uni_str_type);
- append_composite_type_field (rupp_type, "runtime_data", uni_str_type);
- rupp_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
- NULL, rupp_type);
- /* struct process environment block */
- peb_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
- peb_type->set_name (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", rupp_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) * TARGET_CHAR_BIT,
- NULL);
- TYPE_TARGET_TYPE (peb_ptr_type) = peb_type;
- /* struct thread information block */
- tib_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
- tib_type->set_name (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) * TARGET_CHAR_BIT,
- NULL);
- TYPE_TARGET_TYPE (tib_ptr_type) = tib_type;
- windows_gdbarch_data->tib_ptr_type = tib_ptr_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).data (), 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 () && 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 = (gdb_byte *) alloca (tib_size);
- if (target_get_tib_address (ptid, &thread_local_base) == 0)
- {
- gdb_printf (_("Unable to get thread local base for %s\n"),
- target_pid_to_str (ptid).c_str ());
- return -1;
- }
- if (target_read (current_inferior ()->top_target (), TARGET_OBJECT_MEMORY,
- NULL, tib, thread_local_base, tib_size) != tib_size)
- {
- gdb_printf (_("Unable to read thread information "
- "block for %s at address %s\n"),
- target_pid_to_str (ptid).c_str (),
- paddress (target_gdbarch (), thread_local_base));
- return -1;
- }
- gdb_printf (_("Thread Information Block %s at %s\n"),
- target_pid_to_str (ptid).c_str (),
- 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)
- gdb_printf (_("%s is 0x%s\n"), TIB_NAME[i], phex (val, size));
- else if (val != 0)
- gdb_printf (_("TIB[0x%s] is 0x%s\n"), phex (i * size, 2),
- phex (val, size));
- index += size;
- }
- return 1;
- }
- /* Display thread information block of the current thread. */
- static void
- display_tib (const char * args, int from_tty)
- {
- if (inferior_ptid != null_ptid)
- display_one_tib (inferior_ptid);
- }
- void
- windows_xfer_shared_library (const char* so_name, CORE_ADDR load_addr,
- CORE_ADDR *text_offset_cached,
- struct gdbarch *gdbarch, struct obstack *obstack)
- {
- CORE_ADDR text_offset = text_offset_cached ? *text_offset_cached : 0;
- obstack_grow_str (obstack, "<library name=\"");
- std::string p = xml_escape_text (so_name);
- obstack_grow_str (obstack, p.c_str ());
- obstack_grow_str (obstack, "\"><segment address=\"");
- if (!text_offset)
- {
- gdb_bfd_ref_ptr dll (gdb_bfd_open (so_name, gnutarget));
- /* The following calls are OK even if dll is NULL.
- The default value 0x1000 is returned by pe_text_section_offset
- in that case. */
- text_offset = pe_text_section_offset (dll.get ());
- if (text_offset_cached)
- *text_offset_cached = text_offset;
- }
- obstack_grow_str (obstack, paddress (gdbarch, load_addr + text_offset));
- obstack_grow_str (obstack, "\"/></library>");
- }
- /* Implement the "iterate_over_objfiles_in_search_order" gdbarch
- method. It searches all objfiles, starting with CURRENT_OBJFILE
- first (if not NULL).
- On Windows, the system behaves a little differently when two
- objfiles each define a global symbol using the same name, compared
- to other platforms such as GNU/Linux for instance. On GNU/Linux,
- all instances of the symbol effectively get merged into a single
- one, but on Windows, they remain distinct.
- As a result, it usually makes sense to start global symbol searches
- with the current objfile before expanding it to all other objfiles.
- This helps for instance when a user debugs some code in a DLL that
- refers to a global variable defined inside that DLL. When trying
- to print the value of that global variable, it would be unhelpful
- to print the value of another global variable defined with the same
- name, but in a different DLL. */
- static void
- windows_iterate_over_objfiles_in_search_order
- (struct gdbarch *gdbarch,
- iterate_over_objfiles_in_search_order_cb_ftype *cb,
- void *cb_data, struct objfile *current_objfile)
- {
- int stop;
- if (current_objfile)
- {
- stop = cb (current_objfile, cb_data);
- if (stop)
- return;
- }
- for (objfile *objfile : current_program_space->objfiles ())
- {
- if (objfile != current_objfile)
- {
- stop = cb (objfile, cb_data);
- if (stop)
- return;
- }
- }
- }
- static void
- show_maint_show_all_tib (struct ui_file *file, int from_tty,
- struct cmd_list_element *c, const char *value)
- {
- gdb_printf (file, _("Show all non-zero elements of "
- "Thread Information Block is %s.\n"), value);
- }
- static int w32_prefix_command_valid = 0;
- void
- init_w32_command_list (void)
- {
- if (!w32_prefix_command_valid)
- {
- add_basic_prefix_cmd
- ("w32", class_info,
- _("Print information specific to Win32 debugging."),
- &info_w32_cmdlist, 0, &infolist);
- w32_prefix_command_valid = 1;
- }
- }
- /* Implementation of `gdbarch_gdb_signal_to_target' for Windows. */
- static int
- windows_gdb_signal_to_target (struct gdbarch *gdbarch, enum gdb_signal signal)
- {
- switch (signal)
- {
- case GDB_SIGNAL_0:
- return 0;
- case GDB_SIGNAL_HUP:
- return WINDOWS_SIGHUP;
- case GDB_SIGNAL_INT:
- return WINDOWS_SIGINT;
- case GDB_SIGNAL_QUIT:
- return WINDOWS_SIGQUIT;
- case GDB_SIGNAL_ILL:
- return WINDOWS_SIGILL;
- case GDB_SIGNAL_TRAP:
- return WINDOWS_SIGTRAP;
- case GDB_SIGNAL_ABRT:
- return WINDOWS_SIGABRT;
- case GDB_SIGNAL_EMT:
- return WINDOWS_SIGEMT;
- case GDB_SIGNAL_FPE:
- return WINDOWS_SIGFPE;
- case GDB_SIGNAL_KILL:
- return WINDOWS_SIGKILL;
- case GDB_SIGNAL_BUS:
- return WINDOWS_SIGBUS;
- case GDB_SIGNAL_SEGV:
- return WINDOWS_SIGSEGV;
- case GDB_SIGNAL_SYS:
- return WINDOWS_SIGSYS;
- case GDB_SIGNAL_PIPE:
- return WINDOWS_SIGPIPE;
- case GDB_SIGNAL_ALRM:
- return WINDOWS_SIGALRM;
- case GDB_SIGNAL_TERM:
- return WINDOWS_SIGTERM;
- }
- return -1;
- }
- /* Implementation of `gdbarch_gdb_signal_to_target' for Cygwin. */
- static int
- cygwin_gdb_signal_to_target (struct gdbarch *gdbarch, enum gdb_signal signal)
- {
- switch (signal)
- {
- case GDB_SIGNAL_0:
- return 0;
- case GDB_SIGNAL_HUP:
- return CYGWIN_SIGHUP;
- case GDB_SIGNAL_INT:
- return CYGWIN_SIGINT;
- case GDB_SIGNAL_QUIT:
- return CYGWIN_SIGQUIT;
- case GDB_SIGNAL_ILL:
- return CYGWIN_SIGILL;
- case GDB_SIGNAL_TRAP:
- return CYGWIN_SIGTRAP;
- case GDB_SIGNAL_ABRT:
- return CYGWIN_SIGABRT;
- case GDB_SIGNAL_EMT:
- return CYGWIN_SIGEMT;
- case GDB_SIGNAL_FPE:
- return CYGWIN_SIGFPE;
- case GDB_SIGNAL_KILL:
- return CYGWIN_SIGKILL;
- case GDB_SIGNAL_BUS:
- return CYGWIN_SIGBUS;
- case GDB_SIGNAL_SEGV:
- return CYGWIN_SIGSEGV;
- case GDB_SIGNAL_SYS:
- return CYGWIN_SIGSYS;
- case GDB_SIGNAL_PIPE:
- return CYGWIN_SIGPIPE;
- case GDB_SIGNAL_ALRM:
- return CYGWIN_SIGALRM;
- case GDB_SIGNAL_TERM:
- return CYGWIN_SIGTERM;
- case GDB_SIGNAL_URG:
- return CYGWIN_SIGURG;
- case GDB_SIGNAL_STOP:
- return CYGWIN_SIGSTOP;
- case GDB_SIGNAL_TSTP:
- return CYGWIN_SIGTSTP;
- case GDB_SIGNAL_CONT:
- return CYGWIN_SIGCONT;
- case GDB_SIGNAL_CHLD:
- return CYGWIN_SIGCHLD;
- case GDB_SIGNAL_TTIN:
- return CYGWIN_SIGTTIN;
- case GDB_SIGNAL_TTOU:
- return CYGWIN_SIGTTOU;
- case GDB_SIGNAL_IO:
- return CYGWIN_SIGIO;
- case GDB_SIGNAL_XCPU:
- return CYGWIN_SIGXCPU;
- case GDB_SIGNAL_XFSZ:
- return CYGWIN_SIGXFSZ;
- case GDB_SIGNAL_VTALRM:
- return CYGWIN_SIGVTALRM;
- case GDB_SIGNAL_PROF:
- return CYGWIN_SIGPROF;
- case GDB_SIGNAL_WINCH:
- return CYGWIN_SIGWINCH;
- case GDB_SIGNAL_PWR:
- return CYGWIN_SIGLOST;
- case GDB_SIGNAL_USR1:
- return CYGWIN_SIGUSR1;
- case GDB_SIGNAL_USR2:
- return CYGWIN_SIGUSR2;
- }
- return -1;
- }
- struct enum_value_name
- {
- uint32_t value;
- const char *name;
- };
- /* Allocate a TYPE_CODE_ENUM type structure with its named values. */
- static struct type *
- create_enum (struct gdbarch *gdbarch, int bit, const char *name,
- const struct enum_value_name *values, int count)
- {
- struct type *type;
- int i;
- type = arch_type (gdbarch, TYPE_CODE_ENUM, bit, name);
- type->set_num_fields (count);
- type->set_fields
- ((struct field *) TYPE_ZALLOC (type, sizeof (struct field) * count));
- type->set_is_unsigned (true);
- for (i = 0; i < count; i++)
- {
- type->field (i).set_name (values[i].name);
- type->field (i).set_loc_enumval (values[i].value);
- }
- return type;
- }
- static const struct enum_value_name exception_values[] =
- {
- { 0x40000015, "FATAL_APP_EXIT" },
- { 0x4000001E, "WX86_SINGLE_STEP" },
- { 0x4000001F, "WX86_BREAKPOINT" },
- { 0x40010005, "DBG_CONTROL_C" },
- { 0x40010008, "DBG_CONTROL_BREAK" },
- { 0x80000002, "DATATYPE_MISALIGNMENT" },
- { 0x80000003, "BREAKPOINT" },
- { 0x80000004, "SINGLE_STEP" },
- { 0xC0000005, "ACCESS_VIOLATION" },
- { 0xC0000006, "IN_PAGE_ERROR" },
- { 0xC000001D, "ILLEGAL_INSTRUCTION" },
- { 0xC0000025, "NONCONTINUABLE_EXCEPTION" },
- { 0xC0000026, "INVALID_DISPOSITION" },
- { 0xC000008C, "ARRAY_BOUNDS_EXCEEDED" },
- { 0xC000008D, "FLOAT_DENORMAL_OPERAND" },
- { 0xC000008E, "FLOAT_DIVIDE_BY_ZERO" },
- { 0xC000008F, "FLOAT_INEXACT_RESULT" },
- { 0xC0000090, "FLOAT_INVALID_OPERATION" },
- { 0xC0000091, "FLOAT_OVERFLOW" },
- { 0xC0000092, "FLOAT_STACK_CHECK" },
- { 0xC0000093, "FLOAT_UNDERFLOW" },
- { 0xC0000094, "INTEGER_DIVIDE_BY_ZERO" },
- { 0xC0000095, "INTEGER_OVERFLOW" },
- { 0xC0000096, "PRIV_INSTRUCTION" },
- { 0xC00000FD, "STACK_OVERFLOW" },
- { 0xC0000409, "FAST_FAIL" },
- };
- static const struct enum_value_name violation_values[] =
- {
- { 0, "READ_ACCESS_VIOLATION" },
- { 1, "WRITE_ACCESS_VIOLATION" },
- { 8, "DATA_EXECUTION_PREVENTION_VIOLATION" },
- };
- /* Implement the "get_siginfo_type" gdbarch method. */
- static struct type *
- windows_get_siginfo_type (struct gdbarch *gdbarch)
- {
- struct windows_gdbarch_data *windows_gdbarch_data;
- struct type *dword_type, *pvoid_type, *ulongptr_type;
- struct type *code_enum, *violation_enum;
- struct type *violation_type, *para_type, *siginfo_ptr_type, *siginfo_type;
- windows_gdbarch_data = get_windows_gdbarch_data (gdbarch);
- if (windows_gdbarch_data->siginfo_type != NULL)
- return windows_gdbarch_data->siginfo_type;
- dword_type = arch_integer_type (gdbarch, gdbarch_int_bit (gdbarch),
- 1, "DWORD");
- pvoid_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch), "PVOID",
- builtin_type (gdbarch)->builtin_void);
- ulongptr_type = arch_integer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
- 1, "ULONG_PTR");
- /* ExceptionCode value names */
- code_enum = create_enum (gdbarch, gdbarch_int_bit (gdbarch),
- "ExceptionCode", exception_values,
- ARRAY_SIZE (exception_values));
- /* ACCESS_VIOLATION type names */
- violation_enum = create_enum (gdbarch, gdbarch_ptr_bit (gdbarch),
- "ViolationType", violation_values,
- ARRAY_SIZE (violation_values));
- /* ACCESS_VIOLATION information */
- violation_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_STRUCT);
- append_composite_type_field (violation_type, "Type", violation_enum);
- append_composite_type_field (violation_type, "Address", pvoid_type);
- /* Unnamed union of the documented field ExceptionInformation,
- and the alternative AccessViolationInformation (which displays
- human-readable values for ExceptionCode ACCESS_VIOLATION). */
- para_type = arch_composite_type (gdbarch, NULL, TYPE_CODE_UNION);
- append_composite_type_field (para_type, "ExceptionInformation",
- lookup_array_range_type (ulongptr_type, 0, 14));
- append_composite_type_field (para_type, "AccessViolationInformation",
- violation_type);
- siginfo_type = arch_composite_type (gdbarch, "EXCEPTION_RECORD",
- TYPE_CODE_STRUCT);
- siginfo_ptr_type = arch_pointer_type (gdbarch, gdbarch_ptr_bit (gdbarch),
- NULL, siginfo_type);
- /* ExceptionCode is documented as type DWORD, but here a helper
- enum type is used instead to display a human-readable value. */
- append_composite_type_field (siginfo_type, "ExceptionCode", code_enum);
- append_composite_type_field (siginfo_type, "ExceptionFlags", dword_type);
- append_composite_type_field (siginfo_type, "ExceptionRecord",
- siginfo_ptr_type);
- append_composite_type_field (siginfo_type, "ExceptionAddress",
- pvoid_type);
- append_composite_type_field (siginfo_type, "NumberParameters", dword_type);
- /* The 64-bit variant needs some padding. */
- append_composite_type_field_aligned (siginfo_type, "",
- para_type, TYPE_LENGTH (ulongptr_type));
- windows_gdbarch_data->siginfo_type = siginfo_type;
- return siginfo_type;
- }
- /* Implement the "solib_create_inferior_hook" target_so_ops method. */
- static void
- windows_solib_create_inferior_hook (int from_tty)
- {
- CORE_ADDR exec_base = 0;
- /* Find base address of main executable in
- TIB->process_environment_block->image_base_address. */
- struct gdbarch *gdbarch = target_gdbarch ();
- enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
- int ptr_bytes;
- int peb_offset; /* Offset of process_environment_block in TIB. */
- int base_offset; /* Offset of image_base_address in PEB. */
- if (gdbarch_ptr_bit (gdbarch) == 32)
- {
- ptr_bytes = 4;
- peb_offset = 48;
- base_offset = 8;
- }
- else
- {
- ptr_bytes = 8;
- peb_offset = 96;
- base_offset = 16;
- }
- CORE_ADDR tlb;
- gdb_byte buf[8];
- if (target_has_execution ()
- && target_get_tib_address (inferior_ptid, &tlb)
- && !target_read_memory (tlb + peb_offset, buf, ptr_bytes))
- {
- CORE_ADDR peb = extract_unsigned_integer (buf, ptr_bytes, byte_order);
- if (!target_read_memory (peb + base_offset, buf, ptr_bytes))
- exec_base = extract_unsigned_integer (buf, ptr_bytes, byte_order);
- }
- /* Rebase executable if the base address changed because of ASLR. */
- if (current_program_space->symfile_object_file != nullptr && exec_base != 0)
- {
- CORE_ADDR vmaddr
- = pe_data (current_program_space->exec_bfd ())->pe_opthdr.ImageBase;
- if (vmaddr != exec_base)
- objfile_rebase (current_program_space->symfile_object_file,
- exec_base - vmaddr);
- }
- }
- static struct target_so_ops windows_so_ops;
- /* Common parts for gdbarch initialization for the Windows and Cygwin OS
- ABIs. */
- static void
- windows_init_abi_common (struct gdbarch_info info, struct gdbarch *gdbarch)
- {
- set_gdbarch_wchar_bit (gdbarch, 16);
- set_gdbarch_wchar_signed (gdbarch, 0);
- /* Canonical paths on this target look like
- `c:\Program Files\Foo App\mydll.dll', for example. */
- set_gdbarch_has_dos_based_file_system (gdbarch, 1);
- set_gdbarch_iterate_over_objfiles_in_search_order
- (gdbarch, windows_iterate_over_objfiles_in_search_order);
- windows_so_ops = solib_target_so_ops;
- windows_so_ops.solib_create_inferior_hook
- = windows_solib_create_inferior_hook;
- set_solib_ops (gdbarch, &windows_so_ops);
- set_gdbarch_get_siginfo_type (gdbarch, windows_get_siginfo_type);
- }
- /* See windows-tdep.h. */
- void
- windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
- {
- windows_init_abi_common (info, gdbarch);
- set_gdbarch_gdb_signal_to_target (gdbarch, windows_gdb_signal_to_target);
- }
- /* See windows-tdep.h. */
- void
- cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
- {
- windows_init_abi_common (info, gdbarch);
- set_gdbarch_gdb_signal_to_target (gdbarch, cygwin_gdb_signal_to_target);
- }
- /* Implementation of `tlb' variable. */
- static const struct internalvar_funcs tlb_funcs =
- {
- tlb_make_value,
- NULL,
- };
- /* Layout of an element of a PE's Import Directory Table. Based on:
- https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#import-directory-table
- */
- struct pe_import_directory_entry
- {
- uint32_t import_lookup_table_rva;
- uint32_t timestamp;
- uint32_t forwarder_chain;
- uint32_t name_rva;
- uint32_t import_address_table_rva;
- };
- gdb_static_assert (sizeof (pe_import_directory_entry) == 20);
- /* See windows-tdep.h. */
- bool
- is_linked_with_cygwin_dll (bfd *abfd)
- {
- /* The list of DLLs a PE is linked to is in the .idata section. See:
- https://docs.microsoft.com/en-us/windows/win32/debug/pe-format#the-idata-section
- */
- asection *idata_section = bfd_get_section_by_name (abfd, ".idata");
- if (idata_section == nullptr)
- return false;
- bfd_size_type idata_section_size = bfd_section_size (idata_section);
- internal_extra_pe_aouthdr *pe_extra = &pe_data (abfd)->pe_opthdr;
- bfd_vma import_table_va = pe_extra->DataDirectory[PE_IMPORT_TABLE].VirtualAddress;
- bfd_vma idata_section_va = bfd_section_vma (idata_section);
- /* The section's virtual address as reported by BFD has the image base applied,
- remove it. */
- gdb_assert (idata_section_va >= pe_extra->ImageBase);
- idata_section_va -= pe_extra->ImageBase;
- bfd_vma idata_section_end_va = idata_section_va + idata_section_size;
- /* Make sure that the import table is indeed within the .idata section's range. */
- if (import_table_va < idata_section_va
- || import_table_va >= idata_section_end_va)
- {
- warning (_("\
- %s: import table's virtual address (0x%" BFD_VMA_FMT "x) is outside .idata \
- section's range [0x%" BFD_VMA_FMT "x, 0x%" BFD_VMA_FMT "x[."),
- bfd_get_filename (abfd), import_table_va, idata_section_va,
- idata_section_end_va);
- return false;
- }
- /* The import table starts at this offset into the .idata section. */
- bfd_vma import_table_offset_in_sect = import_table_va - idata_section_va;
- /* Get the section's data. */
- gdb::byte_vector idata_contents;
- if (!gdb_bfd_get_full_section_contents (abfd, idata_section, &idata_contents))
- {
- warning (_("%s: failed to get contents of .idata section."),
- bfd_get_filename (abfd));
- return false;
- }
- gdb_assert (idata_contents.size () == idata_section_size);
- const gdb_byte *iter = idata_contents.data () + import_table_offset_in_sect;
- const gdb_byte *end = idata_contents.data () + idata_section_size;
- const pe_import_directory_entry null_dir_entry = { 0 };
- /* Iterate through all directory entries. */
- while (true)
- {
- /* Is there enough space left in the section for another entry? */
- if (iter + sizeof (pe_import_directory_entry) > end)
- {
- warning (_("%s: unexpected end of .idata section."),
- bfd_get_filename (abfd));
- break;
- }
- pe_import_directory_entry *dir_entry = (pe_import_directory_entry *) iter;
- /* Is it the end of list marker? */
- if (memcmp (dir_entry, &null_dir_entry,
- sizeof (pe_import_directory_entry)) == 0)
- break;
- bfd_vma name_va = dir_entry->name_rva;
- /* If the name's virtual address is smaller than the section's virtual
- address, there's a problem. */
- if (name_va < idata_section_va || name_va >= idata_section_end_va)
- {
- warning (_("\
- %s: name's virtual address (0x%" BFD_VMA_FMT "x) is outside .idata section's \
- range [0x%" BFD_VMA_FMT "x, 0x%" BFD_VMA_FMT "x[."),
- bfd_get_filename (abfd), name_va, idata_section_va,
- idata_section_end_va);
- break;
- }
- const gdb_byte *name = &idata_contents[name_va - idata_section_va];
- /* Make sure we don't overshoot the end of the section with the
- streq. */
- if (name + sizeof (CYGWIN_DLL_NAME) <= end)
- {
- /* Finally, check if this is the dll name we are looking for. */
- if (streq ((const char *) name, CYGWIN_DLL_NAME))
- return true;
- }
- iter += sizeof (pe_import_directory_entry);
- }
- return false;
- }
- struct cpms_data
- {
- struct gdbarch *gdbarch;
- struct obstack *obstack;
- int module_count;
- };
- static void
- core_process_module_section (bfd *abfd, asection *sect, void *obj)
- {
- struct cpms_data *data = (struct cpms_data *) obj;
- enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch);
- unsigned int data_type;
- char *module_name;
- size_t module_name_size;
- size_t module_name_offset;
- CORE_ADDR base_addr;
- if (!startswith (sect->name, ".module"))
- return;
- gdb::byte_vector buf (bfd_section_size (sect) + 1);
- if (!bfd_get_section_contents (abfd, sect,
- buf.data (), 0, bfd_section_size (sect)))
- return;
- /* We're going to treat part of the buffer as a string, so make sure
- it is NUL-terminated. */
- buf.back () = 0;
- /* A DWORD (data_type) followed by struct windows_core_module_info. */
- if (bfd_section_size (sect) < 4)
- return;
- data_type = extract_unsigned_integer (buf.data (), 4, byte_order);
- if (data_type == NOTE_INFO_MODULE)
- {
- module_name_offset = 12;
- if (bfd_section_size (sect) < module_name_offset)
- return;
- base_addr = extract_unsigned_integer (&buf[4], 4, byte_order);
- module_name_size = extract_unsigned_integer (&buf[8], 4, byte_order);
- }
- else if (data_type == NOTE_INFO_MODULE64)
- {
- module_name_offset = 16;
- if (bfd_section_size (sect) < module_name_offset)
- return;
- base_addr = extract_unsigned_integer (&buf[4], 8, byte_order);
- module_name_size = extract_unsigned_integer (&buf[12], 4, byte_order);
- }
- else
- return;
- if (module_name_offset + module_name_size > bfd_section_size (sect))
- return;
- module_name = (char *) buf.data () + module_name_offset;
- /* The first module is the .exe itself. */
- if (data->module_count != 0)
- windows_xfer_shared_library (module_name, base_addr,
- NULL, data->gdbarch, data->obstack);
- data->module_count++;
- }
- ULONGEST
- windows_core_xfer_shared_libraries (struct gdbarch *gdbarch,
- gdb_byte *readbuf,
- ULONGEST offset, ULONGEST len)
- {
- struct obstack obstack;
- const char *buf;
- ULONGEST len_avail;
- struct cpms_data data = { gdbarch, &obstack, 0 };
- obstack_init (&obstack);
- obstack_grow_str (&obstack, "<library-list>\n");
- bfd_map_over_sections (core_bfd,
- core_process_module_section,
- &data);
- obstack_grow_str0 (&obstack, "</library-list>\n");
- buf = (const char *) obstack_finish (&obstack);
- len_avail = strlen (buf);
- if (offset >= len_avail)
- return 0;
- if (len > len_avail - offset)
- len = len_avail - offset;
- memcpy (readbuf, buf + offset, len);
- obstack_free (&obstack, NULL);
- return len;
- }
- /* This is how we want PTIDs from core files to be printed. */
- std::string
- windows_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
- {
- if (ptid.lwp () != 0)
- return string_printf ("Thread 0x%lx", ptid.lwp ());
- return normal_pid_to_str (ptid);
- }
- void _initialize_windows_tdep ();
- void
- _initialize_windows_tdep ()
- {
- windows_gdbarch_data_handle
- = gdbarch_data_register_post_init (init_windows_gdbarch_data);
- init_w32_command_list ();
- cmd_list_element *info_w32_thread_information_block_cmd
- = add_cmd ("thread-information-block", class_info, display_tib,
- _("Display thread information block."),
- &info_w32_cmdlist);
- add_alias_cmd ("tib", info_w32_thread_information_block_cmd, 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);
- }
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