Commit | Line | Data |
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1762d96d | 1 | /* Target-dependent code for Cygwin running on i386's, for GDB. |
acd5c798 | 2 | |
ecd75fc8 | 3 | Copyright (C) 2003-2014 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 "i386-tdep.h" |
31b060a2 | 23 | #include "windows-tdep.h" |
de584861 PA |
24 | #include "regset.h" |
25 | #include "gdb_obstack.h" | |
26 | #include "xml-support.h" | |
27 | #include "gdbcore.h" | |
a5ee0f0c | 28 | #include "inferior.h" |
de584861 PA |
29 | |
30 | /* Core file support. */ | |
31 | ||
32 | /* This vector maps GDB's idea of a register's number into an address | |
dc05df57 | 33 | in the windows exception context vector. */ |
de584861 | 34 | |
dc05df57 | 35 | static int i386_windows_gregset_reg_offset[] = |
de584861 PA |
36 | { |
37 | 176, /* eax */ | |
38 | 172, /* ecx */ | |
39 | 168, /* edx */ | |
40 | 164, /* ebx */ | |
41 | ||
42 | 196, /* esp */ | |
43 | 180, /* ebp */ | |
44 | 160, /* esi */ | |
45 | 156, /* edi */ | |
46 | ||
47 | 184, /* eip */ | |
48 | 192, /* eflags */ | |
49 | 188, /* cs */ | |
50 | 200, /* ss */ | |
51 | ||
52 | 152, /* ds */ | |
53 | 148, /* es */ | |
54 | 144, /* fs */ | |
55 | 140, /* gs */ | |
56 | ||
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] */ | |
65 | ||
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 */ | |
74 | ||
75 | /* XMM0-7 */ | |
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] */ | |
84 | ||
85 | /* MXCSR */ | |
86 | 228 /* ExtendedRegisters[24] */ | |
87 | }; | |
88 | ||
dc05df57 | 89 | #define I386_WINDOWS_SIZEOF_GREGSET 716 |
de584861 PA |
90 | |
91 | /* Return the appropriate register set for the core section identified | |
92 | by SECT_NAME and SECT_SIZE. */ | |
93 | ||
94 | static const struct regset * | |
dc05df57 | 95 | i386_windows_regset_from_core_section (struct gdbarch *gdbarch, |
de584861 PA |
96 | const char *sect_name, size_t sect_size) |
97 | { | |
de584861 | 98 | if (strcmp (sect_name, ".reg") == 0 |
dc05df57 | 99 | && sect_size == I386_WINDOWS_SIZEOF_GREGSET) |
ecc37a5a | 100 | return &i386_gregset; |
de584861 PA |
101 | |
102 | return NULL; | |
103 | } | |
104 | ||
de584861 PA |
105 | struct cpms_data |
106 | { | |
5af949e3 | 107 | struct gdbarch *gdbarch; |
de584861 PA |
108 | struct obstack *obstack; |
109 | int module_count; | |
110 | }; | |
111 | ||
112 | static void | |
113 | core_process_module_section (bfd *abfd, asection *sect, void *obj) | |
114 | { | |
115 | struct cpms_data *data = obj; | |
e17a4113 | 116 | enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch); |
de584861 PA |
117 | |
118 | char *module_name; | |
119 | size_t module_name_size; | |
120 | CORE_ADDR base_addr; | |
121 | ||
001f13d8 | 122 | gdb_byte *buf = NULL; |
de584861 PA |
123 | |
124 | if (strncmp (sect->name, ".module", 7) != 0) | |
125 | return; | |
126 | ||
127 | buf = xmalloc (bfd_get_section_size (sect) + 1); | |
128 | if (!buf) | |
129 | { | |
130 | printf_unfiltered ("memory allocation failed for %s\n", sect->name); | |
131 | goto out; | |
132 | } | |
133 | if (!bfd_get_section_contents (abfd, sect, | |
134 | buf, 0, bfd_get_section_size (sect))) | |
135 | goto out; | |
136 | ||
137 | ||
138 | ||
dc05df57 | 139 | /* A DWORD (data_type) followed by struct windows_core_module_info. */ |
de584861 PA |
140 | |
141 | base_addr = | |
e17a4113 | 142 | extract_unsigned_integer (buf + 4, 4, byte_order); |
de584861 PA |
143 | |
144 | module_name_size = | |
e17a4113 | 145 | extract_unsigned_integer (buf + 8, 4, byte_order); |
de584861 | 146 | |
001f13d8 | 147 | if (12 + module_name_size > bfd_get_section_size (sect)) |
de584861 | 148 | goto out; |
001f13d8 | 149 | module_name = (char *) buf + 12; |
de584861 PA |
150 | |
151 | /* The first module is the .exe itself. */ | |
152 | if (data->module_count != 0) | |
5af949e3 UW |
153 | windows_xfer_shared_library (module_name, base_addr, |
154 | data->gdbarch, data->obstack); | |
de584861 PA |
155 | data->module_count++; |
156 | ||
157 | out: | |
158 | if (buf) | |
159 | xfree (buf); | |
160 | return; | |
161 | } | |
162 | ||
c09f20e4 | 163 | static ULONGEST |
dc05df57 | 164 | windows_core_xfer_shared_libraries (struct gdbarch *gdbarch, |
de584861 | 165 | gdb_byte *readbuf, |
7ec1862d | 166 | ULONGEST offset, ULONGEST len) |
de584861 PA |
167 | { |
168 | struct obstack obstack; | |
169 | const char *buf; | |
c09f20e4 | 170 | ULONGEST len_avail; |
5af949e3 | 171 | struct cpms_data data = { gdbarch, &obstack, 0 }; |
de584861 PA |
172 | |
173 | obstack_init (&obstack); | |
174 | obstack_grow_str (&obstack, "<library-list>\n"); | |
175 | bfd_map_over_sections (core_bfd, | |
176 | core_process_module_section, | |
177 | &data); | |
178 | obstack_grow_str0 (&obstack, "</library-list>\n"); | |
179 | ||
180 | buf = obstack_finish (&obstack); | |
181 | len_avail = strlen (buf); | |
182 | if (offset >= len_avail) | |
183 | return 0; | |
184 | ||
185 | if (len > len_avail - offset) | |
186 | len = len_avail - offset; | |
187 | memcpy (readbuf, buf + offset, len); | |
188 | ||
189 | obstack_free (&obstack, NULL); | |
190 | return len; | |
191 | } | |
1762d96d | 192 | |
a5ee0f0c PA |
193 | /* This is how we want PTIDs from core files to be printed. */ |
194 | ||
195 | static char * | |
196 | i386_windows_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid) | |
197 | { | |
198 | static char buf[80]; | |
199 | ||
200 | if (ptid_get_lwp (ptid) != 0) | |
201 | { | |
202 | snprintf (buf, sizeof (buf), "Thread 0x%lx", ptid_get_lwp (ptid)); | |
203 | return buf; | |
204 | } | |
205 | ||
206 | return normal_pid_to_str (ptid); | |
207 | } | |
208 | ||
f7948b5f | 209 | static CORE_ADDR |
52f729a7 | 210 | i386_cygwin_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
f7948b5f | 211 | { |
e17a4113 | 212 | return i386_pe_skip_trampoline_code (frame, pc, NULL); |
f7948b5f JB |
213 | } |
214 | ||
f870a310 TT |
215 | static const char * |
216 | i386_cygwin_auto_wide_charset (void) | |
217 | { | |
218 | return "UTF-16"; | |
219 | } | |
220 | ||
1762d96d CV |
221 | static void |
222 | i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
223 | { | |
224 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
225 | ||
64870a42 YQ |
226 | windows_init_abi (info, gdbarch); |
227 | ||
f7948b5f JB |
228 | set_gdbarch_skip_trampoline_code (gdbarch, i386_cygwin_skip_trampoline_code); |
229 | ||
4309257c PM |
230 | set_gdbarch_skip_main_prologue (gdbarch, i386_skip_main_prologue); |
231 | ||
1762d96d | 232 | tdep->struct_return = reg_struct_return; |
de584861 | 233 | |
dc05df57 CF |
234 | tdep->gregset_reg_offset = i386_windows_gregset_reg_offset; |
235 | tdep->gregset_num_regs = ARRAY_SIZE (i386_windows_gregset_reg_offset); | |
236 | tdep->sizeof_gregset = I386_WINDOWS_SIZEOF_GREGSET; | |
de584861 PA |
237 | |
238 | /* Core file support. */ | |
239 | set_gdbarch_regset_from_core_section | |
dc05df57 | 240 | (gdbarch, i386_windows_regset_from_core_section); |
de584861 | 241 | set_gdbarch_core_xfer_shared_libraries |
dc05df57 | 242 | (gdbarch, windows_core_xfer_shared_libraries); |
a5ee0f0c | 243 | set_gdbarch_core_pid_to_str (gdbarch, i386_windows_core_pid_to_str); |
f870a310 TT |
244 | |
245 | set_gdbarch_auto_wide_charset (gdbarch, i386_cygwin_auto_wide_charset); | |
1762d96d CV |
246 | } |
247 | ||
248 | static enum gdb_osabi | |
de584861 PA |
249 | i386_cygwin_osabi_sniffer (bfd *abfd) |
250 | { | |
1762d96d CV |
251 | char *target_name = bfd_get_target (abfd); |
252 | ||
1762d96d CV |
253 | if (strcmp (target_name, "pei-i386") == 0) |
254 | return GDB_OSABI_CYGWIN; | |
255 | ||
c0993dbe UW |
256 | /* Cygwin uses elf core dumps. Do not claim all ELF executables, |
257 | check whether there is a .reg section of proper size. */ | |
de584861 | 258 | if (strcmp (target_name, "elf32-i386") == 0) |
c0993dbe UW |
259 | { |
260 | asection *section = bfd_get_section_by_name (abfd, ".reg"); | |
261 | if (section | |
dc05df57 | 262 | && bfd_section_size (abfd, section) == I386_WINDOWS_SIZEOF_GREGSET) |
c0993dbe UW |
263 | return GDB_OSABI_CYGWIN; |
264 | } | |
de584861 | 265 | |
1762d96d CV |
266 | return GDB_OSABI_UNKNOWN; |
267 | } | |
268 | ||
acd5c798 MK |
269 | /* Provide a prototype to silence -Wmissing-prototypes. */ |
270 | void _initialize_i386_cygwin_tdep (void); | |
271 | ||
1762d96d CV |
272 | void |
273 | _initialize_i386_cygwin_tdep (void) | |
274 | { | |
275 | gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour, | |
276 | i386_cygwin_osabi_sniffer); | |
277 | ||
de584861 PA |
278 | /* Cygwin uses elf core dumps. */ |
279 | gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour, | |
280 | i386_cygwin_osabi_sniffer); | |
281 | ||
1762d96d CV |
282 | gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN, |
283 | i386_cygwin_init_abi); | |
284 | } |