X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fwindows-tdep.c;h=b6e5b9ff7c2662a55abbff2c7a8d363b172a9297;hb=735fc2ca685b55bf1debbfcea6d2ab544e58a530;hp=1a4bae8cbf060c13360601f32095c12207ba534e;hpb=bfb87e33ab2006cc3ab23d18fd921425223337c5;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/windows-tdep.c b/gdb/windows-tdep.c index 1a4bae8cbf..b6e5b9ff7c 100644 --- a/gdb/windows-tdep.c +++ b/gdb/windows-tdep.c @@ -1,4 +1,4 @@ -/* Copyright (C) 2008, 2009 Free Software Foundation, Inc. +/* Copyright (C) 2008-2020 Free Software Foundation, Inc. This file is part of GDB. @@ -16,26 +16,634 @@ along with this program. If not, see . */ #include "defs.h" -#include "win32-tdep.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" +#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" + +/* Windows signal numbers differ between MinGW flavors and between + those and Cygwin. The below enumeration was gleaned from the + respective headers; the ones marked with MinGW64/Cygwin are defined + only by MinGW64 and Cygwin, not by mingw.org's MinGW. FIXME: We + should really have distinct MinGW vs Cygwin OSABIs, and two + separate enums, selected at runtime. */ + +enum + { + WINDOWS_SIGHUP = 1, /* MinGW64/Cygwin */ + WINDOWS_SIGINT = 2, + WINDOWS_SIGQUIT = 3, /* MinGW64/Cygwin */ + WINDOWS_SIGILL = 4, + WINDOWS_SIGTRAP = 5, /* MinGW64/Cygwin */ +#ifdef __CYGWIN__ + WINDOWS_SIGABRT = 6, +#else + WINDOWS_SIGIOT = 6, /* MinGW64 */ +#endif + WINDOWS_SIGEMT = 7, /* MinGW64/Cygwin */ + WINDOWS_SIGFPE = 8, + WINDOWS_SIGKILL = 9, /* MinGW64/Cygwin */ + WINDOWS_SIGBUS = 10, /* MinGW64/Cygwin */ + WINDOWS_SIGSEGV = 11, + WINDOWS_SIGSYS = 12, /* MinGW64/Cygwin */ + WINDOWS_SIGPIPE = 13,/* MinGW64/Cygwin */ + WINDOWS_SIGALRM = 14,/* MinGW64/Cygwin */ + WINDOWS_SIGTERM = 15, +#ifdef __CYGWIN__ + WINDOWS_SIGURG = 16, + WINDOWS_SIGSTOP = 17, + WINDOWS_SIGTSTP = 18, + WINDOWS_SIGCONT = 19, + WINDOWS_SIGCHLD = 20, + WINDOWS_SIGTTIN = 21, + WINDOWS_SIGTTOU = 22, + WINDOWS_SIGIO = 23, + WINDOWS_SIGXCPU = 24, + WINDOWS_SIGXFSZ = 25, + WINDOWS_SIGVTALRM = 26, + WINDOWS_SIGPROF = 27, + WINDOWS_SIGWINCH = 28, + WINDOWS_SIGLOST = 29, + WINDOWS_SIGUSR1 = 30, + WINDOWS_SIGUSR2 = 31 +#else + WINDOWS_SIGBREAK = 21, + WINDOWS_SIGABRT = 22 +#endif + }; + +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; + +/* 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; + 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"); + + 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) * 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); + 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) * TARGET_CHAR_BIT, + 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) * 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); + 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) * TARGET_CHAR_BIT, + 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 && 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, + struct gdbarch *gdbarch, struct obstack *obstack) { - char *p; + CORE_ADDR text_offset; + obstack_grow_str (obstack, ""); } +/* 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 void +info_w32_command (const 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; + } +} + +/* Implementation of `gdbarch_gdb_signal_to_target'. */ + +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; +#ifdef __CYGWIN__ + case GDB_SIGNAL_URG: + return WINDOWS_SIGURG; + case GDB_SIGNAL_STOP: + return WINDOWS_SIGSTOP; + case GDB_SIGNAL_TSTP: + return WINDOWS_SIGTSTP; + case GDB_SIGNAL_CONT: + return WINDOWS_SIGCONT; + case GDB_SIGNAL_CHLD: + return WINDOWS_SIGCHLD; + case GDB_SIGNAL_TTIN: + return WINDOWS_SIGTTIN; + case GDB_SIGNAL_TTOU: + return WINDOWS_SIGTTOU; + case GDB_SIGNAL_IO: + return WINDOWS_SIGIO; + case GDB_SIGNAL_XCPU: + return WINDOWS_SIGXCPU; + case GDB_SIGNAL_XFSZ: + return WINDOWS_SIGXFSZ; + case GDB_SIGNAL_VTALRM: + return WINDOWS_SIGVTALRM; + case GDB_SIGNAL_PROF: + return WINDOWS_SIGPROF; + case GDB_SIGNAL_WINCH: + return WINDOWS_SIGWINCH; + case GDB_SIGNAL_PWR: + return WINDOWS_SIGLOST; + case GDB_SIGNAL_USR1: + return WINDOWS_SIGUSR1; + case GDB_SIGNAL_USR2: + return WINDOWS_SIGUSR2; +#endif /* __CYGWIN__ */ + } + return -1; +} + +/* To be called from the various GDB_OSABI_CYGWIN handlers for the + various Windows architectures and machine types. */ + +void +windows_init_abi (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); + + set_gdbarch_gdb_signal_to_target (gdbarch, windows_gdb_signal_to_target); + + set_solib_ops (gdbarch, &solib_target_so_ops); +} + +/* 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); +}