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_auto_wide_charset (void)
215 i386_cygwin_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
217 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
219 set_gdbarch_skip_trampoline_code (gdbarch
, i386_cygwin_skip_trampoline_code
);
221 set_gdbarch_skip_main_prologue (gdbarch
, i386_skip_main_prologue
);
223 tdep
->struct_return
= reg_struct_return
;
225 tdep
->gregset_reg_offset
= i386_windows_gregset_reg_offset
;
226 tdep
->gregset_num_regs
= ARRAY_SIZE (i386_windows_gregset_reg_offset
);
227 tdep
->sizeof_gregset
= I386_WINDOWS_SIZEOF_GREGSET
;
229 set_solib_ops (gdbarch
, &solib_target_so_ops
);
231 /* Core file support. */
232 set_gdbarch_regset_from_core_section
233 (gdbarch
, i386_windows_regset_from_core_section
);
234 set_gdbarch_core_xfer_shared_libraries
235 (gdbarch
, windows_core_xfer_shared_libraries
);
237 set_gdbarch_auto_wide_charset (gdbarch
, i386_cygwin_auto_wide_charset
);
239 /* Canonical paths on this target look like
240 `c:\Program Files\Foo App\mydll.dll', for example. */
241 set_gdbarch_has_dos_based_file_system (gdbarch
, 1);
244 static enum gdb_osabi
245 i386_cygwin_osabi_sniffer (bfd
*abfd
)
247 char *target_name
= bfd_get_target (abfd
);
249 /* Interix also uses pei-i386.
250 We need a way to distinguish between the two. */
251 if (strcmp (target_name
, "pei-i386") == 0)
252 return GDB_OSABI_CYGWIN
;
254 /* Cygwin uses elf core dumps. Do not claim all ELF executables,
255 check whether there is a .reg section of proper size. */
256 if (strcmp (target_name
, "elf32-i386") == 0)
258 asection
*section
= bfd_get_section_by_name (abfd
, ".reg");
260 && bfd_section_size (abfd
, section
) == I386_WINDOWS_SIZEOF_GREGSET
)
261 return GDB_OSABI_CYGWIN
;
264 return GDB_OSABI_UNKNOWN
;
267 /* Provide a prototype to silence -Wmissing-prototypes. */
268 void _initialize_i386_cygwin_tdep (void);
271 _initialize_i386_cygwin_tdep (void)
273 gdbarch_register_osabi_sniffer (bfd_arch_i386
, bfd_target_coff_flavour
,
274 i386_cygwin_osabi_sniffer
);
276 /* Cygwin uses elf core dumps. */
277 gdbarch_register_osabi_sniffer (bfd_arch_i386
, bfd_target_elf_flavour
,
278 i386_cygwin_osabi_sniffer
);
280 gdbarch_register_osabi (bfd_arch_i386
, 0, GDB_OSABI_CYGWIN
,
281 i386_cygwin_init_abi
);