1 /* Target-dependent code for Cygwin running on i386's, for GDB.
3 Copyright (C) 2003, 2007 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 "i386-cygwin-tdep.h"
26 #include "gdb_obstack.h"
27 #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 win32 exception context vector. */
35 static int i386_win32_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_WIN32_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_win32_regset_from_core_section (struct gdbarch
*gdbarch
,
96 const char *sect_name
, size_t sect_size
)
98 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
100 if (strcmp (sect_name
, ".reg") == 0
101 && sect_size
== I386_WIN32_SIZEOF_GREGSET
)
103 if (tdep
->gregset
== NULL
)
104 tdep
->gregset
= regset_alloc (gdbarch
, i386_supply_gregset
,
105 i386_collect_gregset
);
106 return tdep
->gregset
;
113 win32_xfer_shared_library (const char* so_name
, CORE_ADDR load_addr
,
114 struct obstack
*obstack
)
117 obstack_grow_str (obstack
, "<library name=\"");
118 p
= xml_escape_text (so_name
);
119 obstack_grow_str (obstack
, p
);
121 obstack_grow_str (obstack
, "\"><segment address=\"0x");
122 /* The symbols in a dll are offset by 0x1000, which is the the
123 offset from 0 of the first byte in an image - because of the file
124 header and the section alignment. */
125 p
= paddr_nz (load_addr
+ 0x1000);
126 obstack_grow_str (obstack
, p
);
127 obstack_grow_str (obstack
, "\"/></library>");
132 struct obstack
*obstack
;
137 core_process_module_section (bfd
*abfd
, asection
*sect
, void *obj
)
139 struct cpms_data
*data
= obj
;
142 size_t module_name_size
;
147 if (strncmp (sect
->name
, ".module", 7) != 0)
150 buf
= xmalloc (bfd_get_section_size (sect
) + 1);
153 printf_unfiltered ("memory allocation failed for %s\n", sect
->name
);
156 if (!bfd_get_section_contents (abfd
, sect
,
157 buf
, 0, bfd_get_section_size (sect
)))
162 /* A DWORD (data_type) followed by struct win32_core_module_info. */
165 extract_unsigned_integer (buf
+ 4, 4);
168 extract_unsigned_integer (buf
+ 8, 4);
170 module_name
= buf
+ 12;
171 if (module_name
- buf
+ module_name_size
> bfd_get_section_size (sect
))
174 /* The first module is the .exe itself. */
175 if (data
->module_count
!= 0)
176 win32_xfer_shared_library (module_name
, base_addr
, data
->obstack
);
177 data
->module_count
++;
186 win32_core_xfer_shared_libraries (struct gdbarch
*gdbarch
,
188 ULONGEST offset
, LONGEST len
)
190 struct obstack obstack
;
193 struct cpms_data data
= { &obstack
, 0 };
195 obstack_init (&obstack
);
196 obstack_grow_str (&obstack
, "<library-list>\n");
197 bfd_map_over_sections (core_bfd
,
198 core_process_module_section
,
200 obstack_grow_str0 (&obstack
, "</library-list>\n");
202 buf
= obstack_finish (&obstack
);
203 len_avail
= strlen (buf
);
204 if (offset
>= len_avail
)
207 if (len
> len_avail
- offset
)
208 len
= len_avail
- offset
;
209 memcpy (readbuf
, buf
+ offset
, len
);
211 obstack_free (&obstack
, NULL
);
216 i386_cygwin_skip_trampoline_code (struct frame_info
*frame
, CORE_ADDR pc
)
218 return i386_pe_skip_trampoline_code (pc
, NULL
);
222 i386_cygwin_init_abi (struct gdbarch_info info
, struct gdbarch
*gdbarch
)
224 struct gdbarch_tdep
*tdep
= gdbarch_tdep (gdbarch
);
226 set_gdbarch_skip_trampoline_code (gdbarch
, i386_cygwin_skip_trampoline_code
);
228 tdep
->struct_return
= reg_struct_return
;
230 tdep
->gregset_reg_offset
= i386_win32_gregset_reg_offset
;
231 tdep
->gregset_num_regs
= ARRAY_SIZE (i386_win32_gregset_reg_offset
);
232 tdep
->sizeof_gregset
= I386_WIN32_SIZEOF_GREGSET
;
234 /* Core file support. */
235 set_gdbarch_regset_from_core_section
236 (gdbarch
, i386_win32_regset_from_core_section
);
237 set_gdbarch_core_xfer_shared_libraries
238 (gdbarch
, win32_core_xfer_shared_libraries
);
241 static enum gdb_osabi
242 i386_cygwin_osabi_sniffer (bfd
*abfd
)
244 char *target_name
= bfd_get_target (abfd
);
246 /* Interix also uses pei-i386.
247 We need a way to distinguish between the two. */
248 if (strcmp (target_name
, "pei-i386") == 0)
249 return GDB_OSABI_CYGWIN
;
251 /* Cygwin uses elf core dumps. */
252 if (strcmp (target_name
, "elf32-i386") == 0)
253 return GDB_OSABI_CYGWIN
;
255 return GDB_OSABI_UNKNOWN
;
258 /* Provide a prototype to silence -Wmissing-prototypes. */
259 void _initialize_i386_cygwin_tdep (void);
262 _initialize_i386_cygwin_tdep (void)
264 gdbarch_register_osabi_sniffer (bfd_arch_i386
, bfd_target_coff_flavour
,
265 i386_cygwin_osabi_sniffer
);
267 /* Cygwin uses elf core dumps. */
268 gdbarch_register_osabi_sniffer (bfd_arch_i386
, bfd_target_elf_flavour
,
269 i386_cygwin_osabi_sniffer
);
271 gdbarch_register_osabi (bfd_arch_i386
, 0, GDB_OSABI_CYGWIN
,
272 i386_cygwin_init_abi
);