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/>. */
22 #include "i386-tdep.h"
23 #include "windows-tdep.h"
25 #include "gdb_obstack.h"
26 #include "xml-support.h"
30 /* Core file support. */
32 /* This vector maps GDB's idea of a register's number into an address
33 in the windows exception context vector. */
35 static int i386_windows_gregset_reg_offset[] =
57 56, /* FloatSave.RegisterArea[0 * 10] */
58 66, /* FloatSave.RegisterArea[1 * 10] */
59 76, /* FloatSave.RegisterArea[2 * 10] */
60 86, /* FloatSave.RegisterArea[3 * 10] */
61 96, /* FloatSave.RegisterArea[4 * 10] */
62 106, /* FloatSave.RegisterArea[5 * 10] */
63 116, /* FloatSave.RegisterArea[6 * 10] */
64 126, /* FloatSave.RegisterArea[7 * 10] */
66 28, /* FloatSave.ControlWord */
67 32, /* FloatSave.StatusWord */
68 36, /* FloatSave.TagWord */
69 44, /* FloatSave.ErrorSelector */
70 40, /* FloatSave.ErrorOffset */
71 52, /* FloatSave.DataSelector */
72 48, /* FloatSave.DataOffset */
73 44, /* FloatSave.ErrorSelector */
76 364, /* ExtendedRegisters[10*16] */
77 380, /* ExtendedRegisters[11*16] */
78 396, /* ExtendedRegisters[12*16] */
79 412, /* ExtendedRegisters[13*16] */
80 428, /* ExtendedRegisters[14*16] */
81 444, /* ExtendedRegisters[15*16] */
82 460, /* ExtendedRegisters[16*16] */
83 476, /* ExtendedRegisters[17*16] */
86 228 /* ExtendedRegisters[24] */
89 #define I386_WINDOWS_SIZEOF_GREGSET 716
91 /* Return the appropriate register set for the core section identified
92 by SECT_NAME and SECT_SIZE. */
94 static const struct regset *
95 i386_windows_regset_from_core_section (struct gdbarch *gdbarch,
96 const char *sect_name, size_t sect_size)
98 if (strcmp (sect_name, ".reg") == 0
99 && sect_size == I386_WINDOWS_SIZEOF_GREGSET)
100 return &i386_gregset;
107 struct gdbarch *gdbarch;
108 struct obstack *obstack;
113 core_process_module_section (bfd *abfd, asection *sect, void *obj)
115 struct cpms_data *data = obj;
116 enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch);
119 size_t module_name_size;
122 gdb_byte *buf = NULL;
124 if (strncmp (sect->name, ".module", 7) != 0)
127 buf = xmalloc (bfd_get_section_size (sect) + 1);
130 printf_unfiltered ("memory allocation failed for %s\n", sect->name);
133 if (!bfd_get_section_contents (abfd, sect,
134 buf, 0, bfd_get_section_size (sect)))
139 /* A DWORD (data_type) followed by struct windows_core_module_info. */
142 extract_unsigned_integer (buf + 4, 4, byte_order);
145 extract_unsigned_integer (buf + 8, 4, byte_order);
147 if (12 + module_name_size > bfd_get_section_size (sect))
149 module_name = (char *) buf + 12;
151 /* The first module is the .exe itself. */
152 if (data->module_count != 0)
153 windows_xfer_shared_library (module_name, base_addr,
154 data->gdbarch, data->obstack);
155 data->module_count++;
164 windows_core_xfer_shared_libraries (struct gdbarch *gdbarch,
166 ULONGEST offset, ULONGEST len)
168 struct obstack obstack;
171 struct cpms_data data = { gdbarch, &obstack, 0 };
173 obstack_init (&obstack);
174 obstack_grow_str (&obstack, "<library-list>\n");
175 bfd_map_over_sections (core_bfd,
176 core_process_module_section,
178 obstack_grow_str0 (&obstack, "</library-list>\n");
180 buf = obstack_finish (&obstack);
181 len_avail = strlen (buf);
182 if (offset >= len_avail)
185 if (len > len_avail - offset)
186 len = len_avail - offset;
187 memcpy (readbuf, buf + offset, len);
189 obstack_free (&obstack, NULL);
193 /* This is how we want PTIDs from core files to be printed. */
196 i386_windows_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
200 if (ptid_get_lwp (ptid) != 0)
202 snprintf (buf, sizeof (buf), "Thread 0x%lx", ptid_get_lwp (ptid));
206 return normal_pid_to_str (ptid);
210 i386_cygwin_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
212 return i386_pe_skip_trampoline_code (frame, pc, NULL);
216 i386_cygwin_auto_wide_charset (void)
222 i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
224 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
226 windows_init_abi (info, gdbarch);
228 set_gdbarch_skip_trampoline_code (gdbarch, i386_cygwin_skip_trampoline_code);
230 set_gdbarch_skip_main_prologue (gdbarch, i386_skip_main_prologue);
232 tdep->struct_return = reg_struct_return;
234 tdep->gregset_reg_offset = i386_windows_gregset_reg_offset;
235 tdep->gregset_num_regs = ARRAY_SIZE (i386_windows_gregset_reg_offset);
236 tdep->sizeof_gregset = I386_WINDOWS_SIZEOF_GREGSET;
238 /* Core file support. */
239 set_gdbarch_regset_from_core_section
240 (gdbarch, i386_windows_regset_from_core_section);
241 set_gdbarch_core_xfer_shared_libraries
242 (gdbarch, windows_core_xfer_shared_libraries);
243 set_gdbarch_core_pid_to_str (gdbarch, i386_windows_core_pid_to_str);
245 set_gdbarch_auto_wide_charset (gdbarch, i386_cygwin_auto_wide_charset);
248 static enum gdb_osabi
249 i386_cygwin_osabi_sniffer (bfd *abfd)
251 char *target_name = bfd_get_target (abfd);
253 if (strcmp (target_name, "pei-i386") == 0)
254 return GDB_OSABI_CYGWIN;
256 /* Cygwin uses elf core dumps. Do not claim all ELF executables,
257 check whether there is a .reg section of proper size. */
258 if (strcmp (target_name, "elf32-i386") == 0)
260 asection *section = bfd_get_section_by_name (abfd, ".reg");
262 && bfd_section_size (abfd, section) == I386_WINDOWS_SIZEOF_GREGSET)
263 return GDB_OSABI_CYGWIN;
266 return GDB_OSABI_UNKNOWN;
269 /* Provide a prototype to silence -Wmissing-prototypes. */
270 void _initialize_i386_cygwin_tdep (void);
273 _initialize_i386_cygwin_tdep (void)
275 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
276 i386_cygwin_osabi_sniffer);
278 /* Cygwin uses elf core dumps. */
279 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
280 i386_cygwin_osabi_sniffer);
282 gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN,
283 i386_cygwin_init_abi);