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5982a56a SM |
1 | /* Target-dependent code for Windows (including Cygwin) running on i386's, |
2 | for GDB. | |
acd5c798 | 3 | |
3666a048 | 4 | Copyright (C) 2003-2021 Free Software Foundation, Inc. |
1762d96d | 5 | |
acd5c798 | 6 | This file is part of GDB. |
1762d96d | 7 | |
acd5c798 MK |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 10 | the Free Software Foundation; either version 3 of the License, or |
acd5c798 | 11 | (at your option) any later version. |
1762d96d | 12 | |
acd5c798 MK |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
1762d96d | 17 | |
acd5c798 | 18 | You should have received a copy of the GNU General Public License |
a9762ec7 | 19 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
1762d96d CV |
20 | |
21 | #include "defs.h" | |
1762d96d | 22 | #include "osabi.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 | 91 | |
f7948b5f | 92 | static CORE_ADDR |
5982a56a | 93 | i386_windows_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
f7948b5f | 94 | { |
e17a4113 | 95 | return i386_pe_skip_trampoline_code (frame, pc, NULL); |
f7948b5f JB |
96 | } |
97 | ||
f870a310 | 98 | static const char * |
5982a56a | 99 | i386_windows_auto_wide_charset (void) |
f870a310 TT |
100 | { |
101 | return "UTF-16"; | |
102 | } | |
103 | ||
627c7fb8 HD |
104 | /* Implement the "push_dummy_call" gdbarch method. */ |
105 | ||
106 | static CORE_ADDR | |
107 | i386_windows_push_dummy_call (struct gdbarch *gdbarch, struct value *function, | |
108 | struct regcache *regcache, CORE_ADDR bp_addr, | |
109 | int nargs, struct value **args, CORE_ADDR sp, | |
110 | function_call_return_method return_method, | |
111 | CORE_ADDR struct_addr) | |
112 | { | |
113 | /* For non-static member functions of 32bit Windows programs, the thiscall | |
114 | calling convention is used, so the 'this' pointer is passed in ECX. */ | |
115 | bool thiscall = false; | |
116 | ||
117 | struct type *type = check_typedef (value_type (function)); | |
78134374 | 118 | if (type->code () == TYPE_CODE_PTR) |
627c7fb8 HD |
119 | type = check_typedef (TYPE_TARGET_TYPE (type)); |
120 | ||
121 | /* read_subroutine_type sets for non-static member functions the | |
122 | artificial flag of the first parameter ('this' pointer). */ | |
78134374 | 123 | if (type->code () == TYPE_CODE_METHOD |
1f704f76 | 124 | && type->num_fields () > 0 |
627c7fb8 | 125 | && TYPE_FIELD_ARTIFICIAL (type, 0) |
940da03e | 126 | && type->field (0).type ()->code () == TYPE_CODE_PTR) |
627c7fb8 HD |
127 | thiscall = 1; |
128 | ||
129 | return i386_thiscall_push_dummy_call (gdbarch, function, regcache, bp_addr, | |
130 | nargs, args, sp, return_method, | |
131 | struct_addr, thiscall); | |
132 | } | |
133 | ||
0f2265e2 SM |
134 | /* Common parts for gdbarch initialization for Windows and Cygwin on i386. */ |
135 | ||
1762d96d | 136 | static void |
0f2265e2 | 137 | i386_windows_init_abi_common (struct gdbarch_info info, struct gdbarch *gdbarch) |
1762d96d CV |
138 | { |
139 | struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); | |
140 | ||
5982a56a | 141 | set_gdbarch_skip_trampoline_code (gdbarch, i386_windows_skip_trampoline_code); |
f7948b5f | 142 | |
4309257c PM |
143 | set_gdbarch_skip_main_prologue (gdbarch, i386_skip_main_prologue); |
144 | ||
1762d96d | 145 | tdep->struct_return = reg_struct_return; |
de584861 | 146 | |
dc05df57 CF |
147 | tdep->gregset_reg_offset = i386_windows_gregset_reg_offset; |
148 | tdep->gregset_num_regs = ARRAY_SIZE (i386_windows_gregset_reg_offset); | |
149 | tdep->sizeof_gregset = I386_WINDOWS_SIZEOF_GREGSET; | |
de584861 | 150 | |
490496c3 AA |
151 | tdep->sizeof_fpregset = 0; |
152 | ||
de584861 | 153 | /* Core file support. */ |
de584861 | 154 | set_gdbarch_core_xfer_shared_libraries |
dc05df57 | 155 | (gdbarch, windows_core_xfer_shared_libraries); |
62a5151b | 156 | set_gdbarch_core_pid_to_str (gdbarch, windows_core_pid_to_str); |
f870a310 | 157 | |
5982a56a | 158 | set_gdbarch_auto_wide_charset (gdbarch, i386_windows_auto_wide_charset); |
1762d96d CV |
159 | } |
160 | ||
0f2265e2 SM |
161 | /* gdbarch initialization for Windows on i386. */ |
162 | ||
163 | static void | |
164 | i386_windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
165 | { | |
166 | i386_windows_init_abi_common (info, gdbarch); | |
167 | windows_init_abi (info, gdbarch); | |
627c7fb8 HD |
168 | |
169 | set_gdbarch_push_dummy_call (gdbarch, i386_windows_push_dummy_call); | |
0f2265e2 SM |
170 | } |
171 | ||
172 | /* gdbarch initialization for Cygwin on i386. */ | |
173 | ||
174 | static void | |
175 | i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) | |
176 | { | |
177 | i386_windows_init_abi_common (info, gdbarch); | |
178 | cygwin_init_abi (info, gdbarch); | |
179 | } | |
180 | ||
5982a56a SM |
181 | static gdb_osabi |
182 | i386_windows_osabi_sniffer (bfd *abfd) | |
de584861 | 183 | { |
1d38e9d1 | 184 | const char *target_name = bfd_get_target (abfd); |
1762d96d | 185 | |
8db52437 SM |
186 | if (!streq (target_name, "pei-i386")) |
187 | return GDB_OSABI_UNKNOWN; | |
053205cc | 188 | |
8db52437 SM |
189 | if (is_linked_with_cygwin_dll (abfd)) |
190 | return GDB_OSABI_CYGWIN; | |
191 | ||
192 | return GDB_OSABI_WINDOWS; | |
053205cc SM |
193 | } |
194 | ||
195 | static enum gdb_osabi | |
196 | i386_cygwin_core_osabi_sniffer (bfd *abfd) | |
197 | { | |
198 | const char *target_name = bfd_get_target (abfd); | |
1762d96d | 199 | |
c0993dbe UW |
200 | /* Cygwin uses elf core dumps. Do not claim all ELF executables, |
201 | check whether there is a .reg section of proper size. */ | |
de584861 | 202 | if (strcmp (target_name, "elf32-i386") == 0) |
c0993dbe UW |
203 | { |
204 | asection *section = bfd_get_section_by_name (abfd, ".reg"); | |
053205cc | 205 | if (section != nullptr |
fd361982 | 206 | && bfd_section_size (section) == I386_WINDOWS_SIZEOF_GREGSET) |
c0993dbe UW |
207 | return GDB_OSABI_CYGWIN; |
208 | } | |
de584861 | 209 | |
1762d96d CV |
210 | return GDB_OSABI_UNKNOWN; |
211 | } | |
212 | ||
5982a56a | 213 | void _initialize_i386_windows_tdep (); |
1762d96d | 214 | void |
5982a56a | 215 | _initialize_i386_windows_tdep () |
1762d96d CV |
216 | { |
217 | gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour, | |
dda83cd7 | 218 | i386_windows_osabi_sniffer); |
1762d96d | 219 | |
de584861 PA |
220 | /* Cygwin uses elf core dumps. */ |
221 | gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour, | |
dda83cd7 | 222 | i386_cygwin_core_osabi_sniffer); |
de584861 | 223 | |
053205cc | 224 | gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_WINDOWS, |
dda83cd7 | 225 | i386_windows_init_abi); |
5982a56a | 226 | gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN, |
0f2265e2 | 227 | i386_cygwin_init_abi); |
1762d96d | 228 | } |