-/* Copyright (C) 2008, 2009 Free Software Foundation, Inc.
+/* Copyright (C) 2008-2020 Free Software Foundation, Inc.
This file is part of GDB.
#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"
+#include "objfiles.h"
+#include "symfile.h"
+#include "coff-pe-read.h"
+#include "gdb_bfd.h"
+#include "complaints.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,
+};
+
+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), 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)
+ {
+ printf_filtered (_("Unable to get thread local base for %s\n"),
+ target_pid_to_str (ptid).c_str ());
+ return -1;
+ }
+
+ if (target_read (current_top_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).c_str (),
+ paddress (target_gdbarch (), thread_local_base));
+ return -1;
+ }
+
+ printf_filtered (_("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)
+ 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 the current thread. */
+
+static void
+display_tib (const char * args, int from_tty)
+{
+ if (inferior_ptid != null_ptid)
+ display_one_tib (inferior_ptid);
+}
void
-win32_xfer_shared_library (const char* so_name, CORE_ADDR load_addr,
- struct obstack *obstack)
+windows_xfer_shared_library (const char* so_name, CORE_ADDR load_addr,
+ CORE_ADDR *text_offset_cached,
+ struct gdbarch *gdbarch, struct obstack *obstack)
{
- char *p;
+ CORE_ADDR text_offset = text_offset_cached ? *text_offset_cached : 0;
+
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=\"0x");
- /* The symbols in a dll are offset by 0x1000, which is the the
- offset from 0 of the first byte in an image - because of the file
- header and the section alignment. */
- p = paddr_nz (load_addr + 0x1000);
- obstack_grow_str (obstack, p);
+ 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)
+{
+ fprintf_filtered (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, "info w32 ", 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_UNSIGNED (type) = 1;
+
+ for (i = 0; i < count; i++)
+ {
+ TYPE_FIELD_NAME (type, i) = values[i].name;
+ SET_FIELD_ENUMVAL (type->field (i), 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 (symfile_objfile != nullptr && exec_base != 0)
+ {
+ CORE_ADDR vmaddr = pe_data (exec_bfd)->pe_opthdr.ImageBase;
+ if (vmaddr != exec_base)
+ objfile_rebase (symfile_objfile, 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,
+ 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;
+}
+
+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 ();
+ 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);
+}
projects / deliverable / binutils-gdb.git / blobdiff