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 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
101 if (strcmp (sect_name
, ".reg") == 0
102 && sect_size
== I386_WINDOWS_SIZEOF_GREGSET
)
104 if (tdep
->gregset
== NULL
)
105 tdep
->gregset
= regset_alloc (gdbarch
, i386_supply_gregset
,
106 i386_collect_gregset
);
107 return tdep
->gregset
;
115 struct gdbarch
*gdbarch
;
116 struct obstack
*obstack
;
121 core_process_module_section (bfd
*abfd
, asection
*sect
, void *obj
)
123 struct cpms_data
*data
= obj
;
124 enum bfd_endian byte_order
= gdbarch_byte_order (data
->gdbarch
);
127 size_t module_name_size
;
130 gdb_byte
*buf
= NULL
;
132 if (strncmp (sect
->name
, ".module", 7) != 0)
135 buf
= xmalloc (bfd_get_section_size (sect
) + 1);
138 printf_unfiltered ("memory allocation failed for %s\n", sect
->name
);
141 if (!bfd_get_section_contents (abfd
, sect
,
142 buf
, 0, bfd_get_section_size (sect
)))
147 /* A DWORD (data_type) followed by struct windows_core_module_info. */
150 extract_unsigned_integer (buf
+ 4, 4, byte_order
);
153 extract_unsigned_integer (buf
+ 8, 4, byte_order
);
155 if (12 + module_name_size
> bfd_get_section_size (sect
))
157 module_name
= (char *) buf
+ 12;
159 /* The first module is the .exe itself. */
160 if (data
->module_count
!= 0)
161 windows_xfer_shared_library (module_name
, base_addr
,
162 data
->gdbarch
, data
->obstack
);
163 data
->module_count
++;
172 windows_core_xfer_shared_libraries (struct gdbarch
*gdbarch
,
174 ULONGEST offset
, LONGEST len
)
176 struct obstack obstack
;
179 struct cpms_data data
= { gdbarch
, &obstack
, 0 };
181 obstack_init (&obstack
);
182 obstack_grow_str (&obstack
, "<library-list>\n");
183 bfd_map_over_sections (core_bfd
,
184 core_process_module_section
,
186 obstack_grow_str0 (&obstack
, "</library-list>\n");
188 buf
= obstack_finish (&obstack
);
189 len_avail
= strlen (buf
);
190 if (offset
>= len_avail
)
193 if (len
> len_avail
- offset
)
194 len
= len_avail
- offset
;
195 memcpy (readbuf
, buf
+ offset
, len
);
197 obstack_free (&obstack
, NULL
);
201 /* This is how we want PTIDs from core files to be printed. */
204 i386_windows_core_pid_to_str (struct gdbarch
*gdbarch
, ptid_t ptid
)
208 if (ptid_get_lwp (ptid
) != 0)
210 snprintf (buf
, sizeof (buf
), "Thread 0x%lx", ptid_get_lwp (ptid
));
214 return normal_pid_to_str (ptid
);
218 i386_cygwin_skip_trampoline_code (struct frame_info
*frame
, CORE_ADDR pc
)
220 return i386_pe_skip_trampoline_code (frame
, pc
, NULL
);
224 i386_cygwin_auto_wide_charset (void)
230 i386_cygwin_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
232 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
234 windows_init_abi (info
, 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 /* Core file support. */
247 set_gdbarch_regset_from_core_section
248 (gdbarch
, i386_windows_regset_from_core_section
);
249 set_gdbarch_core_xfer_shared_libraries
250 (gdbarch
, windows_core_xfer_shared_libraries
);
251 set_gdbarch_core_pid_to_str (gdbarch
, i386_windows_core_pid_to_str
);
253 set_gdbarch_auto_wide_charset (gdbarch
, i386_cygwin_auto_wide_charset
);
256 static enum gdb_osabi
257 i386_cygwin_osabi_sniffer (bfd
*abfd
)
259 char *target_name
= bfd_get_target (abfd
);
261 if (strcmp (target_name
, "pei-i386") == 0)
262 return GDB_OSABI_CYGWIN
;
264 /* Cygwin uses elf core dumps. Do not claim all ELF executables,
265 check whether there is a .reg section of proper size. */
266 if (strcmp (target_name
, "elf32-i386") == 0)
268 asection
*section
= bfd_get_section_by_name (abfd
, ".reg");
270 && bfd_section_size (abfd
, section
) == I386_WINDOWS_SIZEOF_GREGSET
)
271 return GDB_OSABI_CYGWIN
;
274 return GDB_OSABI_UNKNOWN
;
277 /* Provide a prototype to silence -Wmissing-prototypes. */
278 void _initialize_i386_cygwin_tdep (void);
281 _initialize_i386_cygwin_tdep (void)
283 gdbarch_register_osabi_sniffer (bfd_arch_i386
, bfd_target_coff_flavour
,
284 i386_cygwin_osabi_sniffer
);
286 /* Cygwin uses elf core dumps. */
287 gdbarch_register_osabi_sniffer (bfd_arch_i386
, bfd_target_elf_flavour
,
288 i386_cygwin_osabi_sniffer
);
290 gdbarch_register_osabi (bfd_arch_i386
, 0, GDB_OSABI_CYGWIN
,
291 i386_cygwin_init_abi
);