Commit | Line | Data |
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1762d96d | 1 | /* Target-dependent code for Cygwin running on i386's, for GDB. |
acd5c798 | 2 | |
28e7fd62 | 3 | Copyright (C) 2003-2013 Free Software Foundation, Inc. |
1762d96d | 4 | |
acd5c798 | 5 | This file is part of GDB. |
1762d96d | 6 | |
acd5c798 MK |
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 | |
a9762ec7 | 9 | the Free Software Foundation; either version 3 of the License, or |
acd5c798 | 10 | (at your option) any later version. |
1762d96d | 11 | |
acd5c798 MK |
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. | |
1762d96d | 16 | |
acd5c798 | 17 | You should have received a copy of the GNU General Public License |
a9762ec7 | 18 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
1762d96d CV |
19 | |
20 | #include "defs.h" | |
1762d96d | 21 | #include "osabi.h" |
acd5c798 | 22 | #include "gdb_string.h" |
acd5c798 | 23 | #include "i386-tdep.h" |
31b060a2 | 24 | #include "windows-tdep.h" |
de584861 PA |
25 | #include "regset.h" |
26 | #include "gdb_obstack.h" | |
27 | #include "xml-support.h" | |
28 | #include "gdbcore.h" | |
a5ee0f0c | 29 | #include "inferior.h" |
de584861 PA |
30 | |
31 | /* Core file support. */ | |
32 | ||
33 | /* This vector maps GDB's idea of a register's number into an address | |
dc05df57 | 34 | in the windows exception context vector. */ |
de584861 | 35 | |
dc05df57 | 36 | static int i386_windows_gregset_reg_offset[] = |
de584861 PA |
37 | { |
38 | 176, /* eax */ | |
39 | 172, /* ecx */ | |
40 | 168, /* edx */ | |
41 | 164, /* ebx */ | |
42 | ||
43 | 196, /* esp */ | |
44 | 180, /* ebp */ | |
45 | 160, /* esi */ | |
46 | 156, /* edi */ | |
47 | ||
48 | 184, /* eip */ | |
49 | 192, /* eflags */ | |
50 | 188, /* cs */ | |
51 | 200, /* ss */ | |
52 | ||
53 | 152, /* ds */ | |
54 | 148, /* es */ | |
55 | 144, /* fs */ | |
56 | 140, /* gs */ | |
57 | ||
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] */ | |
66 | ||
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 */ | |
75 | ||
76 | /* XMM0-7 */ | |
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] */ | |
85 | ||
86 | /* MXCSR */ | |
87 | 228 /* ExtendedRegisters[24] */ | |
88 | }; | |
89 | ||
dc05df57 | 90 | #define I386_WINDOWS_SIZEOF_GREGSET 716 |
de584861 PA |
91 | |
92 | /* Return the appropriate register set for the core section identified | |
93 | by SECT_NAME and SECT_SIZE. */ | |
94 | ||
95 | static const struct regset * | |
dc05df57 | 96 | i386_windows_regset_from_core_section (struct gdbarch *gdbarch, |
de584861 PA |
97 | const char *sect_name, size_t sect_size) |
98 | { | |
99 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
100 | ||
101 | if (strcmp (sect_name, ".reg") == 0 | |
dc05df57 | 102 | && sect_size == I386_WINDOWS_SIZEOF_GREGSET) |
de584861 PA |
103 | { |
104 | if (tdep->gregset == NULL) | |
105 | tdep->gregset = regset_alloc (gdbarch, i386_supply_gregset, | |
106 | i386_collect_gregset); | |
107 | return tdep->gregset; | |
108 | } | |
109 | ||
110 | return NULL; | |
111 | } | |
112 | ||
de584861 PA |
113 | struct cpms_data |
114 | { | |
5af949e3 | 115 | struct gdbarch *gdbarch; |
de584861 PA |
116 | struct obstack *obstack; |
117 | int module_count; | |
118 | }; | |
119 | ||
120 | static void | |
121 | core_process_module_section (bfd *abfd, asection *sect, void *obj) | |
122 | { | |
123 | struct cpms_data *data = obj; | |
e17a4113 | 124 | enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch); |
de584861 PA |
125 | |
126 | char *module_name; | |
127 | size_t module_name_size; | |
128 | CORE_ADDR base_addr; | |
129 | ||
001f13d8 | 130 | gdb_byte *buf = NULL; |
de584861 PA |
131 | |
132 | if (strncmp (sect->name, ".module", 7) != 0) | |
133 | return; | |
134 | ||
135 | buf = xmalloc (bfd_get_section_size (sect) + 1); | |
136 | if (!buf) | |
137 | { | |
138 | printf_unfiltered ("memory allocation failed for %s\n", sect->name); | |
139 | goto out; | |
140 | } | |
141 | if (!bfd_get_section_contents (abfd, sect, | |
142 | buf, 0, bfd_get_section_size (sect))) | |
143 | goto out; | |
144 | ||
145 | ||
146 | ||
dc05df57 | 147 | /* A DWORD (data_type) followed by struct windows_core_module_info. */ |
de584861 PA |
148 | |
149 | base_addr = | |
e17a4113 | 150 | extract_unsigned_integer (buf + 4, 4, byte_order); |
de584861 PA |
151 | |
152 | module_name_size = | |
e17a4113 | 153 | extract_unsigned_integer (buf + 8, 4, byte_order); |
de584861 | 154 | |
001f13d8 | 155 | if (12 + module_name_size > bfd_get_section_size (sect)) |
de584861 | 156 | goto out; |
001f13d8 | 157 | module_name = (char *) buf + 12; |
de584861 PA |
158 | |
159 | /* The first module is the .exe itself. */ | |
160 | if (data->module_count != 0) | |
5af949e3 UW |
161 | windows_xfer_shared_library (module_name, base_addr, |
162 | data->gdbarch, data->obstack); | |
de584861 PA |
163 | data->module_count++; |
164 | ||
165 | out: | |
166 | if (buf) | |
167 | xfree (buf); | |
168 | return; | |
169 | } | |
170 | ||
171 | static LONGEST | |
dc05df57 | 172 | windows_core_xfer_shared_libraries (struct gdbarch *gdbarch, |
de584861 PA |
173 | gdb_byte *readbuf, |
174 | ULONGEST offset, LONGEST len) | |
175 | { | |
176 | struct obstack obstack; | |
177 | const char *buf; | |
178 | LONGEST len_avail; | |
5af949e3 | 179 | struct cpms_data data = { gdbarch, &obstack, 0 }; |
de584861 PA |
180 | |
181 | obstack_init (&obstack); | |
182 | obstack_grow_str (&obstack, "<library-list>\n"); | |
183 | bfd_map_over_sections (core_bfd, | |
184 | core_process_module_section, | |
185 | &data); | |
186 | obstack_grow_str0 (&obstack, "</library-list>\n"); | |
187 | ||
188 | buf = obstack_finish (&obstack); | |
189 | len_avail = strlen (buf); | |
190 | if (offset >= len_avail) | |
191 | return 0; | |
192 | ||
193 | if (len > len_avail - offset) | |
194 | len = len_avail - offset; | |
195 | memcpy (readbuf, buf + offset, len); | |
196 | ||
197 | obstack_free (&obstack, NULL); | |
198 | return len; | |
199 | } | |
1762d96d | 200 | |
a5ee0f0c PA |
201 | /* This is how we want PTIDs from core files to be printed. */ |
202 | ||
203 | static char * | |
204 | i386_windows_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid) | |
205 | { | |
206 | static char buf[80]; | |
207 | ||
208 | if (ptid_get_lwp (ptid) != 0) | |
209 | { | |
210 | snprintf (buf, sizeof (buf), "Thread 0x%lx", ptid_get_lwp (ptid)); | |
211 | return buf; | |
212 | } | |
213 | ||
214 | return normal_pid_to_str (ptid); | |
215 | } | |
216 | ||
f7948b5f | 217 | static CORE_ADDR |
52f729a7 | 218 | i386_cygwin_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
f7948b5f | 219 | { |
e17a4113 | 220 | return i386_pe_skip_trampoline_code (frame, pc, NULL); |
f7948b5f JB |
221 | } |
222 | ||
f870a310 TT |
223 | static const char * |
224 | i386_cygwin_auto_wide_charset (void) | |
225 | { | |
226 | return "UTF-16"; | |
227 | } | |
228 | ||
1762d96d CV |
229 | static void |
230 | i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
231 | { | |
232 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
233 | ||
64870a42 YQ |
234 | windows_init_abi (info, gdbarch); |
235 | ||
f7948b5f JB |
236 | set_gdbarch_skip_trampoline_code (gdbarch, i386_cygwin_skip_trampoline_code); |
237 | ||
4309257c PM |
238 | set_gdbarch_skip_main_prologue (gdbarch, i386_skip_main_prologue); |
239 | ||
1762d96d | 240 | tdep->struct_return = reg_struct_return; |
de584861 | 241 | |
dc05df57 CF |
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; | |
de584861 PA |
245 | |
246 | /* Core file support. */ | |
247 | set_gdbarch_regset_from_core_section | |
dc05df57 | 248 | (gdbarch, i386_windows_regset_from_core_section); |
de584861 | 249 | set_gdbarch_core_xfer_shared_libraries |
dc05df57 | 250 | (gdbarch, windows_core_xfer_shared_libraries); |
a5ee0f0c | 251 | set_gdbarch_core_pid_to_str (gdbarch, i386_windows_core_pid_to_str); |
f870a310 TT |
252 | |
253 | set_gdbarch_auto_wide_charset (gdbarch, i386_cygwin_auto_wide_charset); | |
1762d96d CV |
254 | } |
255 | ||
256 | static enum gdb_osabi | |
de584861 PA |
257 | i386_cygwin_osabi_sniffer (bfd *abfd) |
258 | { | |
1762d96d CV |
259 | char *target_name = bfd_get_target (abfd); |
260 | ||
1762d96d CV |
261 | if (strcmp (target_name, "pei-i386") == 0) |
262 | return GDB_OSABI_CYGWIN; | |
263 | ||
c0993dbe UW |
264 | /* Cygwin uses elf core dumps. Do not claim all ELF executables, |
265 | check whether there is a .reg section of proper size. */ | |
de584861 | 266 | if (strcmp (target_name, "elf32-i386") == 0) |
c0993dbe UW |
267 | { |
268 | asection *section = bfd_get_section_by_name (abfd, ".reg"); | |
269 | if (section | |
dc05df57 | 270 | && bfd_section_size (abfd, section) == I386_WINDOWS_SIZEOF_GREGSET) |
c0993dbe UW |
271 | return GDB_OSABI_CYGWIN; |
272 | } | |
de584861 | 273 | |
1762d96d CV |
274 | return GDB_OSABI_UNKNOWN; |
275 | } | |
276 | ||
acd5c798 MK |
277 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
278 | void _initialize_i386_cygwin_tdep (void); | |
279 | ||
1762d96d CV |
280 | void |
281 | _initialize_i386_cygwin_tdep (void) | |
282 | { | |
283 | gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour, | |
284 | i386_cygwin_osabi_sniffer); | |
285 | ||
de584861 PA |
286 | /* Cygwin uses elf core dumps. */ |
287 | gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour, | |
288 | i386_cygwin_osabi_sniffer); | |
289 | ||
1762d96d CV |
290 | gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN, |
291 | i386_cygwin_init_abi); | |
292 | } |