1 /* Target-dependent code for Cygwin running on i386's, for GDB.
3 Copyright (C) 2003-2013 Free Software Foundation, Inc.
5 This file is part of GDB.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program. If not, see <http://www.gnu.org/licenses/>. */
22 #include "gdb_string.h"
23 #include "i386-tdep.h"
24 #include "windows-tdep.h"
26 #include "gdb_obstack.h"
27 #include "xml-support.h"
30 #include "solib-target.h"
33 /* Core file support. */
35 /* This vector maps GDB's idea of a register's number into an address
36 in the windows exception context vector. */
38 static int i386_windows_gregset_reg_offset[] =
60 56, /* FloatSave.RegisterArea[0 * 10] */
61 66, /* FloatSave.RegisterArea[1 * 10] */
62 76, /* FloatSave.RegisterArea[2 * 10] */
63 86, /* FloatSave.RegisterArea[3 * 10] */
64 96, /* FloatSave.RegisterArea[4 * 10] */
65 106, /* FloatSave.RegisterArea[5 * 10] */
66 116, /* FloatSave.RegisterArea[6 * 10] */
67 126, /* FloatSave.RegisterArea[7 * 10] */
69 28, /* FloatSave.ControlWord */
70 32, /* FloatSave.StatusWord */
71 36, /* FloatSave.TagWord */
72 44, /* FloatSave.ErrorSelector */
73 40, /* FloatSave.ErrorOffset */
74 52, /* FloatSave.DataSelector */
75 48, /* FloatSave.DataOffset */
76 44, /* FloatSave.ErrorSelector */
79 364, /* ExtendedRegisters[10*16] */
80 380, /* ExtendedRegisters[11*16] */
81 396, /* ExtendedRegisters[12*16] */
82 412, /* ExtendedRegisters[13*16] */
83 428, /* ExtendedRegisters[14*16] */
84 444, /* ExtendedRegisters[15*16] */
85 460, /* ExtendedRegisters[16*16] */
86 476, /* ExtendedRegisters[17*16] */
89 228 /* ExtendedRegisters[24] */
92 #define I386_WINDOWS_SIZEOF_GREGSET 716
94 /* Return the appropriate register set for the core section identified
95 by SECT_NAME and SECT_SIZE. */
97 static const struct regset *
98 i386_windows_regset_from_core_section (struct gdbarch *gdbarch,
99 const char *sect_name, size_t sect_size)
101 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
103 if (strcmp (sect_name, ".reg") == 0
104 && sect_size == I386_WINDOWS_SIZEOF_GREGSET)
106 if (tdep->gregset == NULL)
107 tdep->gregset = regset_alloc (gdbarch, i386_supply_gregset,
108 i386_collect_gregset);
109 return tdep->gregset;
117 struct gdbarch *gdbarch;
118 struct obstack *obstack;
123 core_process_module_section (bfd *abfd, asection *sect, void *obj)
125 struct cpms_data *data = obj;
126 enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch);
129 size_t module_name_size;
132 gdb_byte *buf = NULL;
134 if (strncmp (sect->name, ".module", 7) != 0)
137 buf = xmalloc (bfd_get_section_size (sect) + 1);
140 printf_unfiltered ("memory allocation failed for %s\n", sect->name);
143 if (!bfd_get_section_contents (abfd, sect,
144 buf, 0, bfd_get_section_size (sect)))
149 /* A DWORD (data_type) followed by struct windows_core_module_info. */
152 extract_unsigned_integer (buf + 4, 4, byte_order);
155 extract_unsigned_integer (buf + 8, 4, byte_order);
157 if (12 + module_name_size > bfd_get_section_size (sect))
159 module_name = (char *) buf + 12;
161 /* The first module is the .exe itself. */
162 if (data->module_count != 0)
163 windows_xfer_shared_library (module_name, base_addr,
164 data->gdbarch, data->obstack);
165 data->module_count++;
174 windows_core_xfer_shared_libraries (struct gdbarch *gdbarch,
176 ULONGEST offset, LONGEST len)
178 struct obstack obstack;
181 struct cpms_data data = { gdbarch, &obstack, 0 };
183 obstack_init (&obstack);
184 obstack_grow_str (&obstack, "<library-list>\n");
185 bfd_map_over_sections (core_bfd,
186 core_process_module_section,
188 obstack_grow_str0 (&obstack, "</library-list>\n");
190 buf = obstack_finish (&obstack);
191 len_avail = strlen (buf);
192 if (offset >= len_avail)
195 if (len > len_avail - offset)
196 len = len_avail - offset;
197 memcpy (readbuf, buf + offset, len);
199 obstack_free (&obstack, NULL);
203 /* This is how we want PTIDs from core files to be printed. */
206 i386_windows_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
210 if (ptid_get_lwp (ptid) != 0)
212 snprintf (buf, sizeof (buf), "Thread 0x%lx", ptid_get_lwp (ptid));
216 return normal_pid_to_str (ptid);
220 i386_cygwin_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
222 return i386_pe_skip_trampoline_code (frame, pc, NULL);
226 i386_cygwin_auto_wide_charset (void)
232 i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
234 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
236 set_gdbarch_skip_trampoline_code (gdbarch, i386_cygwin_skip_trampoline_code);
238 set_gdbarch_skip_main_prologue (gdbarch, i386_skip_main_prologue);
240 tdep->struct_return = reg_struct_return;
242 tdep->gregset_reg_offset = i386_windows_gregset_reg_offset;
243 tdep->gregset_num_regs = ARRAY_SIZE (i386_windows_gregset_reg_offset);
244 tdep->sizeof_gregset = I386_WINDOWS_SIZEOF_GREGSET;
246 set_solib_ops (gdbarch, &solib_target_so_ops);
248 /* Core file support. */
249 set_gdbarch_regset_from_core_section
250 (gdbarch, i386_windows_regset_from_core_section);
251 set_gdbarch_core_xfer_shared_libraries
252 (gdbarch, windows_core_xfer_shared_libraries);
253 set_gdbarch_core_pid_to_str (gdbarch, i386_windows_core_pid_to_str);
255 set_gdbarch_auto_wide_charset (gdbarch, i386_cygwin_auto_wide_charset);
257 /* Canonical paths on this target look like
258 `c:\Program Files\Foo App\mydll.dll', for example. */
259 set_gdbarch_has_dos_based_file_system (gdbarch, 1);
261 set_gdbarch_iterate_over_objfiles_in_search_order
262 (gdbarch, windows_iterate_over_objfiles_in_search_order);
265 static enum gdb_osabi
266 i386_cygwin_osabi_sniffer (bfd *abfd)
268 char *target_name = bfd_get_target (abfd);
270 if (strcmp (target_name, "pei-i386") == 0)
271 return GDB_OSABI_CYGWIN;
273 /* Cygwin uses elf core dumps. Do not claim all ELF executables,
274 check whether there is a .reg section of proper size. */
275 if (strcmp (target_name, "elf32-i386") == 0)
277 asection *section = bfd_get_section_by_name (abfd, ".reg");
279 && bfd_section_size (abfd, section) == I386_WINDOWS_SIZEOF_GREGSET)
280 return GDB_OSABI_CYGWIN;
283 return GDB_OSABI_UNKNOWN;
286 /* Provide a prototype to silence -Wmissing-prototypes. */
287 void _initialize_i386_cygwin_tdep (void);
290 _initialize_i386_cygwin_tdep (void)
292 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
293 i386_cygwin_osabi_sniffer);
295 /* Cygwin uses elf core dumps. */
296 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
297 i386_cygwin_osabi_sniffer);
299 gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN,
300 i386_cygwin_init_abi);