Use enums for human-readable exception information.
[deliverable/binutils-gdb.git] / gdb / windows-tdep.c
index ca9b81df29858409901185b3a235d681b4805d16..e9787887a4af87c0faf547b916ecf71feea72dec 100644 (file)
 #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
@@ -102,6 +153,30 @@ 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;
+};
+
+/* 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 *
@@ -114,6 +189,8 @@ windows_get_tlb_type (struct gdbarch *gdbarch)
   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;
 
   /* Do not rebuild type if same gdbarch as last time.  */
   if (last_tlb_type && last_gdbarch == gdbarch)
@@ -123,7 +200,13 @@ windows_get_tlb_type (struct gdbarch *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 */
 
@@ -168,6 +251,57 @@ windows_get_tlb_type (struct gdbarch *gdbarch)
                                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);
@@ -178,7 +312,7 @@ windows_get_tlb_type (struct gdbarch *gdbarch)
   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, "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);
@@ -373,19 +507,27 @@ display_tib (const char * args, int from_tty)
 
 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;
+  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=\"");
-  gdb_bfd_ref_ptr dll (gdb_bfd_open (so_name, gnutarget, -1));
-  /* 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)
+    {
+      gdb_bfd_ref_ptr dll (gdb_bfd_open (so_name, gnutarget, -1));
+      /* 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>");
 }
@@ -461,6 +603,216 @@ init_w32_command_list (void)
     }
 }
 
+/* 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;
+}
+
+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_NFIELDS (type) = count;
+  TYPE_FIELDS (type) = (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 (type, i), values[i].value);
+  }
+
+  return type;
+}
+
+static const struct enum_value_name exception_values[] =
+{
+  { 0x40000015, "FATAL_APP_EXIT" },
+  { 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;
+}
+
 /* To be called from the various GDB_OSABI_CYGWIN handlers for the
    various Windows architectures and machine types.  */
 
@@ -477,7 +829,11 @@ windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   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);
+
+  set_gdbarch_get_siginfo_type (gdbarch, windows_get_siginfo_type);
 }
 
 /* Implementation of `tlb' variable.  */
@@ -489,9 +845,13 @@ static const struct internalvar_funcs tlb_funcs =
   NULL
 };
 
+void _initialize_windows_tdep ();
 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."),
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