1 /* Target-dependent code for Cygwin running on i386's, for GDB.
3 Copyright (C) 2003-2014 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/>. */
23 #include "i386-tdep.h"
24 #include "windows-tdep.h"
26 #include "gdb_obstack.h"
27 #include "xml-support.h"
31 /* Core file support. */
33 /* This vector maps GDB's idea of a register's number into an address
34 in the windows exception context vector. */
36 static int i386_windows_gregset_reg_offset[] =
58 56, /* FloatSave.RegisterArea[0 * 10] */
59 66, /* FloatSave.RegisterArea[1 * 10] */
60 76, /* FloatSave.RegisterArea[2 * 10] */
61 86, /* FloatSave.RegisterArea[3 * 10] */
62 96, /* FloatSave.RegisterArea[4 * 10] */
63 106, /* FloatSave.RegisterArea[5 * 10] */
64 116, /* FloatSave.RegisterArea[6 * 10] */
65 126, /* FloatSave.RegisterArea[7 * 10] */
67 28, /* FloatSave.ControlWord */
68 32, /* FloatSave.StatusWord */
69 36, /* FloatSave.TagWord */
70 44, /* FloatSave.ErrorSelector */
71 40, /* FloatSave.ErrorOffset */
72 52, /* FloatSave.DataSelector */
73 48, /* FloatSave.DataOffset */
74 44, /* FloatSave.ErrorSelector */
77 364, /* ExtendedRegisters[10*16] */
78 380, /* ExtendedRegisters[11*16] */
79 396, /* ExtendedRegisters[12*16] */
80 412, /* ExtendedRegisters[13*16] */
81 428, /* ExtendedRegisters[14*16] */
82 444, /* ExtendedRegisters[15*16] */
83 460, /* ExtendedRegisters[16*16] */
84 476, /* ExtendedRegisters[17*16] */
87 228 /* ExtendedRegisters[24] */
90 #define I386_WINDOWS_SIZEOF_GREGSET 716
92 /* Return the appropriate register set for the core section identified
93 by SECT_NAME and SECT_SIZE. */
95 static const struct regset *
96 i386_windows_regset_from_core_section (struct gdbarch *gdbarch,
97 const char *sect_name, size_t sect_size)
99 if (strcmp (sect_name, ".reg") == 0
100 && sect_size == I386_WINDOWS_SIZEOF_GREGSET)
101 return &i386_gregset;
108 struct gdbarch *gdbarch;
109 struct obstack *obstack;
114 core_process_module_section (bfd *abfd, asection *sect, void *obj)
116 struct cpms_data *data = obj;
117 enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch);
120 size_t module_name_size;
123 gdb_byte *buf = NULL;
125 if (strncmp (sect->name, ".module", 7) != 0)
128 buf = xmalloc (bfd_get_section_size (sect) + 1);
131 printf_unfiltered ("memory allocation failed for %s\n", sect->name);
134 if (!bfd_get_section_contents (abfd, sect,
135 buf, 0, bfd_get_section_size (sect)))
140 /* A DWORD (data_type) followed by struct windows_core_module_info. */
143 extract_unsigned_integer (buf + 4, 4, byte_order);
146 extract_unsigned_integer (buf + 8, 4, byte_order);
148 if (12 + module_name_size > bfd_get_section_size (sect))
150 module_name = (char *) buf + 12;
152 /* The first module is the .exe itself. */
153 if (data->module_count != 0)
154 windows_xfer_shared_library (module_name, base_addr,
155 data->gdbarch, data->obstack);
156 data->module_count++;
165 windows_core_xfer_shared_libraries (struct gdbarch *gdbarch,
167 ULONGEST offset, ULONGEST len)
169 struct obstack obstack;
172 struct cpms_data data = { gdbarch, &obstack, 0 };
174 obstack_init (&obstack);
175 obstack_grow_str (&obstack, "<library-list>\n");
176 bfd_map_over_sections (core_bfd,
177 core_process_module_section,
179 obstack_grow_str0 (&obstack, "</library-list>\n");
181 buf = obstack_finish (&obstack);
182 len_avail = strlen (buf);
183 if (offset >= len_avail)
186 if (len > len_avail - offset)
187 len = len_avail - offset;
188 memcpy (readbuf, buf + offset, len);
190 obstack_free (&obstack, NULL);
194 /* This is how we want PTIDs from core files to be printed. */
197 i386_windows_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
201 if (ptid_get_lwp (ptid) != 0)
203 snprintf (buf, sizeof (buf), "Thread 0x%lx", ptid_get_lwp (ptid));
207 return normal_pid_to_str (ptid);
211 i386_cygwin_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
213 return i386_pe_skip_trampoline_code (frame, pc, NULL);
217 i386_cygwin_auto_wide_charset (void)
223 i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
225 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
227 windows_init_abi (info, gdbarch);
229 set_gdbarch_skip_trampoline_code (gdbarch, i386_cygwin_skip_trampoline_code);
231 set_gdbarch_skip_main_prologue (gdbarch, i386_skip_main_prologue);
233 tdep->struct_return = reg_struct_return;
235 tdep->gregset_reg_offset = i386_windows_gregset_reg_offset;
236 tdep->gregset_num_regs = ARRAY_SIZE (i386_windows_gregset_reg_offset);
237 tdep->sizeof_gregset = I386_WINDOWS_SIZEOF_GREGSET;
239 /* Core file support. */
240 set_gdbarch_regset_from_core_section
241 (gdbarch, i386_windows_regset_from_core_section);
242 set_gdbarch_core_xfer_shared_libraries
243 (gdbarch, windows_core_xfer_shared_libraries);
244 set_gdbarch_core_pid_to_str (gdbarch, i386_windows_core_pid_to_str);
246 set_gdbarch_auto_wide_charset (gdbarch, i386_cygwin_auto_wide_charset);
249 static enum gdb_osabi
250 i386_cygwin_osabi_sniffer (bfd *abfd)
252 char *target_name = bfd_get_target (abfd);
254 if (strcmp (target_name, "pei-i386") == 0)
255 return GDB_OSABI_CYGWIN;
257 /* Cygwin uses elf core dumps. Do not claim all ELF executables,
258 check whether there is a .reg section of proper size. */
259 if (strcmp (target_name, "elf32-i386") == 0)
261 asection *section = bfd_get_section_by_name (abfd, ".reg");
263 && bfd_section_size (abfd, section) == I386_WINDOWS_SIZEOF_GREGSET)
264 return GDB_OSABI_CYGWIN;
267 return GDB_OSABI_UNKNOWN;
270 /* Provide a prototype to silence -Wmissing-prototypes. */
271 void _initialize_i386_cygwin_tdep (void);
274 _initialize_i386_cygwin_tdep (void)
276 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
277 i386_cygwin_osabi_sniffer);
279 /* Cygwin uses elf core dumps. */
280 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
281 i386_cygwin_osabi_sniffer);
283 gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN,
284 i386_cygwin_init_abi);