1 /* Target-dependent code for Cygwin running on i386's, for GDB.
3 Copyright (C) 2003, 2007, 2008 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 #include "solib-target.h"
32 /* Core file support. */
34 /* This vector maps GDB's idea of a register's number into an address
35 in the win32 exception context vector. */
37 static int i386_win32_gregset_reg_offset[] =
59 56, /* FloatSave.RegisterArea[0 * 10] */
60 66, /* FloatSave.RegisterArea[1 * 10] */
61 76, /* FloatSave.RegisterArea[2 * 10] */
62 86, /* FloatSave.RegisterArea[3 * 10] */
63 96, /* FloatSave.RegisterArea[4 * 10] */
64 106, /* FloatSave.RegisterArea[5 * 10] */
65 116, /* FloatSave.RegisterArea[6 * 10] */
66 126, /* FloatSave.RegisterArea[7 * 10] */
68 28, /* FloatSave.ControlWord */
69 32, /* FloatSave.StatusWord */
70 36, /* FloatSave.TagWord */
71 44, /* FloatSave.ErrorSelector */
72 40, /* FloatSave.ErrorOffset */
73 52, /* FloatSave.DataSelector */
74 48, /* FloatSave.DataOffset */
75 44, /* FloatSave.ErrorSelector */
78 364, /* ExtendedRegisters[10*16] */
79 380, /* ExtendedRegisters[11*16] */
80 396, /* ExtendedRegisters[12*16] */
81 412, /* ExtendedRegisters[13*16] */
82 428, /* ExtendedRegisters[14*16] */
83 444, /* ExtendedRegisters[15*16] */
84 460, /* ExtendedRegisters[16*16] */
85 476, /* ExtendedRegisters[17*16] */
88 228 /* ExtendedRegisters[24] */
91 #define I386_WIN32_SIZEOF_GREGSET 716
93 /* Return the appropriate register set for the core section identified
94 by SECT_NAME and SECT_SIZE. */
96 static const struct regset *
97 i386_win32_regset_from_core_section (struct gdbarch *gdbarch,
98 const char *sect_name, size_t sect_size)
100 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
102 if (strcmp (sect_name, ".reg") == 0
103 && sect_size == I386_WIN32_SIZEOF_GREGSET)
105 if (tdep->gregset == NULL)
106 tdep->gregset = regset_alloc (gdbarch, i386_supply_gregset,
107 i386_collect_gregset);
108 return tdep->gregset;
115 win32_xfer_shared_library (const char* so_name, CORE_ADDR load_addr,
116 struct obstack *obstack)
119 obstack_grow_str (obstack, "<library name=\"");
120 p = xml_escape_text (so_name);
121 obstack_grow_str (obstack, p);
123 obstack_grow_str (obstack, "\"><segment address=\"0x");
124 /* The symbols in a dll are offset by 0x1000, which is the the
125 offset from 0 of the first byte in an image - because of the file
126 header and the section alignment. */
127 p = paddr_nz (load_addr + 0x1000);
128 obstack_grow_str (obstack, p);
129 obstack_grow_str (obstack, "\"/></library>");
134 struct obstack *obstack;
139 core_process_module_section (bfd *abfd, asection *sect, void *obj)
141 struct cpms_data *data = obj;
144 size_t module_name_size;
149 if (strncmp (sect->name, ".module", 7) != 0)
152 buf = xmalloc (bfd_get_section_size (sect) + 1);
155 printf_unfiltered ("memory allocation failed for %s\n", sect->name);
158 if (!bfd_get_section_contents (abfd, sect,
159 buf, 0, bfd_get_section_size (sect)))
164 /* A DWORD (data_type) followed by struct win32_core_module_info. */
167 extract_unsigned_integer (buf + 4, 4);
170 extract_unsigned_integer (buf + 8, 4);
172 module_name = buf + 12;
173 if (module_name - buf + module_name_size > bfd_get_section_size (sect))
176 /* The first module is the .exe itself. */
177 if (data->module_count != 0)
178 win32_xfer_shared_library (module_name, base_addr, data->obstack);
179 data->module_count++;
188 win32_core_xfer_shared_libraries (struct gdbarch *gdbarch,
190 ULONGEST offset, LONGEST len)
192 struct obstack obstack;
195 struct cpms_data data = { &obstack, 0 };
197 obstack_init (&obstack);
198 obstack_grow_str (&obstack, "<library-list>\n");
199 bfd_map_over_sections (core_bfd,
200 core_process_module_section,
202 obstack_grow_str0 (&obstack, "</library-list>\n");
204 buf = obstack_finish (&obstack);
205 len_avail = strlen (buf);
206 if (offset >= len_avail)
209 if (len > len_avail - offset)
210 len = len_avail - offset;
211 memcpy (readbuf, buf + offset, len);
213 obstack_free (&obstack, NULL);
218 i386_cygwin_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
220 return i386_pe_skip_trampoline_code (pc, NULL);
224 i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
226 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
228 set_gdbarch_skip_trampoline_code (gdbarch, i386_cygwin_skip_trampoline_code);
230 tdep->struct_return = reg_struct_return;
232 tdep->gregset_reg_offset = i386_win32_gregset_reg_offset;
233 tdep->gregset_num_regs = ARRAY_SIZE (i386_win32_gregset_reg_offset);
234 tdep->sizeof_gregset = I386_WIN32_SIZEOF_GREGSET;
236 set_solib_ops (gdbarch, &solib_target_so_ops);
238 /* Core file support. */
239 set_gdbarch_regset_from_core_section
240 (gdbarch, i386_win32_regset_from_core_section);
241 set_gdbarch_core_xfer_shared_libraries
242 (gdbarch, win32_core_xfer_shared_libraries);
245 static enum gdb_osabi
246 i386_cygwin_osabi_sniffer (bfd *abfd)
248 char *target_name = bfd_get_target (abfd);
250 /* Interix also uses pei-i386.
251 We need a way to distinguish between the two. */
252 if (strcmp (target_name, "pei-i386") == 0)
253 return GDB_OSABI_CYGWIN;
255 /* Cygwin uses elf core dumps. Do not claim all ELF executables,
256 check whether there is a .reg section of proper size. */
257 if (strcmp (target_name, "elf32-i386") == 0)
259 asection *section = bfd_get_section_by_name (abfd, ".reg");
261 && bfd_section_size (abfd, section) == I386_WIN32_SIZEOF_GREGSET)
262 return GDB_OSABI_CYGWIN;
265 return GDB_OSABI_UNKNOWN;
268 /* Provide a prototype to silence -Wmissing-prototypes. */
269 void _initialize_i386_cygwin_tdep (void);
272 _initialize_i386_cygwin_tdep (void)
274 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
275 i386_cygwin_osabi_sniffer);
277 /* Cygwin uses elf core dumps. */
278 gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
279 i386_cygwin_osabi_sniffer);
281 gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN,
282 i386_cygwin_init_abi);