1 /* Target-dependent code for Cygwin running on i386's, for GDB.
3 Copyright (C) 2003, 2007, 2008, 2009, 2010 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"
32 /* Core file support. */
34 /* This vector maps GDB's idea of a register's number into an address
35 in the windows exception context vector. */
37 static int i386_windows_gregset_reg_offset[] =
59 56, /* FloatSave.RegisterArea[0 * 10] */
60 66, /* FloatSave.RegisterArea[1 * 10] */
61 76, /* FloatSave.RegisterArea[2 * 10] */
62 86, /* FloatSave.RegisterArea[3 * 10] */
63 96, /* FloatSave.RegisterArea[4 * 10] */
64 106, /* FloatSave.RegisterArea[5 * 10] */
65 116, /* FloatSave.RegisterArea[6 * 10] */
66 126, /* FloatSave.RegisterArea[7 * 10] */
68 28, /* FloatSave.ControlWord */
69 32, /* FloatSave.StatusWord */
70 36, /* FloatSave.TagWord */
71 44, /* FloatSave.ErrorSelector */
72 40, /* FloatSave.ErrorOffset */
73 52, /* FloatSave.DataSelector */
74 48, /* FloatSave.DataOffset */
75 44, /* FloatSave.ErrorSelector */
78 364, /* ExtendedRegisters[10*16] */
79 380, /* ExtendedRegisters[11*16] */
80 396, /* ExtendedRegisters[12*16] */
81 412, /* ExtendedRegisters[13*16] */
82 428, /* ExtendedRegisters[14*16] */
83 444, /* ExtendedRegisters[15*16] */
84 460, /* ExtendedRegisters[16*16] */
85 476, /* ExtendedRegisters[17*16] */
88 228 /* ExtendedRegisters[24] */
91 #define I386_WINDOWS_SIZEOF_GREGSET 716
93 /* Return the appropriate register set for the core section identified
94 by SECT_NAME and SECT_SIZE. */
96 static const struct regset *
97 i386_windows_regset_from_core_section (struct gdbarch *gdbarch,
98 const char *sect_name, size_t sect_size)
100 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
102 if (strcmp (sect_name, ".reg") == 0
103 && sect_size == I386_WINDOWS_SIZEOF_GREGSET)
105 if (tdep->gregset == NULL)
106 tdep->gregset = regset_alloc (gdbarch, i386_supply_gregset,
107 i386_collect_gregset);
108 return tdep->gregset;
116 struct gdbarch *gdbarch;
117 struct obstack *obstack;
122 core_process_module_section (bfd *abfd, asection *sect, void *obj)
124 struct cpms_data *data = obj;
125 enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch);
128 size_t module_name_size;
133 if (strncmp (sect->name, ".module", 7) != 0)
136 buf = xmalloc (bfd_get_section_size (sect) + 1);
139 printf_unfiltered ("memory allocation failed for %s\n", sect->name);
142 if (!bfd_get_section_contents (abfd, sect,
143 buf, 0, bfd_get_section_size (sect)))
148 /* A DWORD (data_type) followed by struct windows_core_module_info. */
151 extract_unsigned_integer (buf + 4, 4, byte_order);
154 extract_unsigned_integer (buf + 8, 4, byte_order);
156 module_name = buf + 12;
157 if (module_name - buf + module_name_size > bfd_get_section_size (sect))
160 /* The first module is the .exe itself. */
161 if (data->module_count != 0)
162 windows_xfer_shared_library (module_name, base_addr,
163 data->gdbarch, data->obstack);
164 data->module_count++;
173 windows_core_xfer_shared_libraries (struct gdbarch *gdbarch,
175 ULONGEST offset, LONGEST len)
177 struct obstack obstack;
180 struct cpms_data data = { gdbarch, &obstack, 0 };
182 obstack_init (&obstack);
183 obstack_grow_str (&obstack, "<library-list>\n");
184 bfd_map_over_sections (core_bfd,
185 core_process_module_section,
187 obstack_grow_str0 (&obstack, "</library-list>\n");
189 buf = obstack_finish (&obstack);
190 len_avail = strlen (buf);
191 if (offset >= len_avail)
194 if (len > len_avail - offset)
195 len = len_avail - offset;
196 memcpy (readbuf, buf + offset, len);
198 obstack_free (&obstack, NULL);
203 i386_cygwin_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
205 return i386_pe_skip_trampoline_code (frame, pc, NULL);
209 i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
211 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
213 set_gdbarch_skip_trampoline_code (gdbarch, i386_cygwin_skip_trampoline_code);
215 set_gdbarch_skip_main_prologue (gdbarch, i386_skip_main_prologue);
217 tdep->struct_return = reg_struct_return;
219 tdep->gregset_reg_offset = i386_windows_gregset_reg_offset;
220 tdep->gregset_num_regs = ARRAY_SIZE (i386_windows_gregset_reg_offset);
221 tdep->sizeof_gregset = I386_WINDOWS_SIZEOF_GREGSET;
223 set_solib_ops (gdbarch, &solib_target_so_ops);
225 /* Core file support. */
226 set_gdbarch_regset_from_core_section
227 (gdbarch, i386_windows_regset_from_core_section);
228 set_gdbarch_core_xfer_shared_libraries
229 (gdbarch, windows_core_xfer_shared_libraries);
232 static enum gdb_osabi
233 i386_cygwin_osabi_sniffer (bfd *abfd)
235 char *target_name = bfd_get_target (abfd);
237 /* Interix also uses pei-i386.
238 We need a way to distinguish between the two. */
239 if (strcmp (target_name, "pei-i386") == 0)
240 return GDB_OSABI_CYGWIN;
242 /* Cygwin uses elf core dumps. Do not claim all ELF executables,
243 check whether there is a .reg section of proper size. */
244 if (strcmp (target_name, "elf32-i386") == 0)
246 asection *section = bfd_get_section_by_name (abfd, ".reg");
248 && bfd_section_size (abfd, section) == I386_WINDOWS_SIZEOF_GREGSET)
249 return GDB_OSABI_CYGWIN;
252 return GDB_OSABI_UNKNOWN;
255 /* Provide a prototype to silence -Wmissing-prototypes. */
256 void _initialize_i386_cygwin_tdep (void);
259 _initialize_i386_cygwin_tdep (void)
261 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
262 i386_cygwin_osabi_sniffer);
264 /* Cygwin uses elf core dumps. */
265 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
266 i386_cygwin_osabi_sniffer);
268 gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN,
269 i386_cygwin_init_abi);