/* Target-dependent code for Cygwin running on i386's, for GDB. Copyright (C) 2003, 2007 Free Software Foundation, Inc. This file is part of GDB. This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation; either version 3 of the License, or (at your option) any later version. This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "defs.h" #include "osabi.h" #include "gdb_string.h" #include "i386-tdep.h" #include "i386-cygwin-tdep.h" #include "regset.h" #include "gdb_obstack.h" #include "xml-support.h" #include "gdbcore.h" #include "solib.h" #include "solib-target.h" /* Core file support. */ /* This vector maps GDB's idea of a register's number into an address in the win32 exception context vector. */ static int i386_win32_gregset_reg_offset[] = { 176, /* eax */ 172, /* ecx */ 168, /* edx */ 164, /* ebx */ 196, /* esp */ 180, /* ebp */ 160, /* esi */ 156, /* edi */ 184, /* eip */ 192, /* eflags */ 188, /* cs */ 200, /* ss */ 152, /* ds */ 148, /* es */ 144, /* fs */ 140, /* gs */ 56, /* FloatSave.RegisterArea[0 * 10] */ 66, /* FloatSave.RegisterArea[1 * 10] */ 76, /* FloatSave.RegisterArea[2 * 10] */ 86, /* FloatSave.RegisterArea[3 * 10] */ 96, /* FloatSave.RegisterArea[4 * 10] */ 106, /* FloatSave.RegisterArea[5 * 10] */ 116, /* FloatSave.RegisterArea[6 * 10] */ 126, /* FloatSave.RegisterArea[7 * 10] */ 28, /* FloatSave.ControlWord */ 32, /* FloatSave.StatusWord */ 36, /* FloatSave.TagWord */ 44, /* FloatSave.ErrorSelector */ 40, /* FloatSave.ErrorOffset */ 52, /* FloatSave.DataSelector */ 48, /* FloatSave.DataOffset */ 44, /* FloatSave.ErrorSelector */ /* XMM0-7 */ 364, /* ExtendedRegisters[10*16] */ 380, /* ExtendedRegisters[11*16] */ 396, /* ExtendedRegisters[12*16] */ 412, /* ExtendedRegisters[13*16] */ 428, /* ExtendedRegisters[14*16] */ 444, /* ExtendedRegisters[15*16] */ 460, /* ExtendedRegisters[16*16] */ 476, /* ExtendedRegisters[17*16] */ /* MXCSR */ 228 /* ExtendedRegisters[24] */ }; #define I386_WIN32_SIZEOF_GREGSET 716 /* Return the appropriate register set for the core section identified by SECT_NAME and SECT_SIZE. */ static const struct regset * i386_win32_regset_from_core_section (struct gdbarch *gdbarch, const char *sect_name, size_t sect_size) { struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); if (strcmp (sect_name, ".reg") == 0 && sect_size == I386_WIN32_SIZEOF_GREGSET) { if (tdep->gregset == NULL) tdep->gregset = regset_alloc (gdbarch, i386_supply_gregset, i386_collect_gregset); return tdep->gregset; } return NULL; } void win32_xfer_shared_library (const char* so_name, CORE_ADDR load_addr, struct obstack *obstack) { char *p; obstack_grow_str (obstack, "<library name=\""); p = xml_escape_text (so_name); obstack_grow_str (obstack, p); xfree (p); obstack_grow_str (obstack, "\"><segment address=\"0x"); /* The symbols in a dll are offset by 0x1000, which is the the offset from 0 of the first byte in an image - because of the file header and the section alignment. */ p = paddr_nz (load_addr + 0x1000); obstack_grow_str (obstack, p); obstack_grow_str (obstack, "\"/></library>"); } struct cpms_data { struct obstack *obstack; int module_count; }; static void core_process_module_section (bfd *abfd, asection *sect, void *obj) { struct cpms_data *data = obj; char *module_name; size_t module_name_size; CORE_ADDR base_addr; char *buf = NULL; if (strncmp (sect->name, ".module", 7) != 0) return; buf = xmalloc (bfd_get_section_size (sect) + 1); if (!buf) { printf_unfiltered ("memory allocation failed for %s\n", sect->name); goto out; } if (!bfd_get_section_contents (abfd, sect, buf, 0, bfd_get_section_size (sect))) goto out; /* A DWORD (data_type) followed by struct win32_core_module_info. */ base_addr = extract_unsigned_integer (buf + 4, 4); module_name_size = extract_unsigned_integer (buf + 8, 4); module_name = buf + 12; if (module_name - buf + module_name_size > bfd_get_section_size (sect)) goto out; /* The first module is the .exe itself. */ if (data->module_count != 0) win32_xfer_shared_library (module_name, base_addr, data->obstack); data->module_count++; out: if (buf) xfree (buf); return; } static LONGEST win32_core_xfer_shared_libraries (struct gdbarch *gdbarch, gdb_byte *readbuf, ULONGEST offset, LONGEST len) { struct obstack obstack; const char *buf; LONGEST len_avail; struct cpms_data data = { &obstack, 0 }; obstack_init (&obstack); obstack_grow_str (&obstack, "<library-list>\n"); bfd_map_over_sections (core_bfd, core_process_module_section, &data); obstack_grow_str0 (&obstack, "</library-list>\n"); buf = obstack_finish (&obstack); len_avail = strlen (buf); if (offset >= len_avail) return 0; if (len > len_avail - offset) len = len_avail - offset; memcpy (readbuf, buf + offset, len); obstack_free (&obstack, NULL); return len; } static CORE_ADDR i386_cygwin_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) { return i386_pe_skip_trampoline_code (pc, NULL); } static void i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); set_gdbarch_skip_trampoline_code (gdbarch, i386_cygwin_skip_trampoline_code); tdep->struct_return = reg_struct_return; tdep->gregset_reg_offset = i386_win32_gregset_reg_offset; tdep->gregset_num_regs = ARRAY_SIZE (i386_win32_gregset_reg_offset); tdep->sizeof_gregset = I386_WIN32_SIZEOF_GREGSET; set_solib_ops (gdbarch, &solib_target_so_ops); /* Core file support. */ set_gdbarch_regset_from_core_section (gdbarch, i386_win32_regset_from_core_section); set_gdbarch_core_xfer_shared_libraries (gdbarch, win32_core_xfer_shared_libraries); } static enum gdb_osabi i386_cygwin_osabi_sniffer (bfd *abfd) { char *target_name = bfd_get_target (abfd); /* Interix also uses pei-i386. We need a way to distinguish between the two. */ if (strcmp (target_name, "pei-i386") == 0) return GDB_OSABI_CYGWIN; /* Cygwin uses elf core dumps. */ if (strcmp (target_name, "elf32-i386") == 0) return GDB_OSABI_CYGWIN; return GDB_OSABI_UNKNOWN; } /* Provide a prototype to silence -Wmissing-prototypes. */ void _initialize_i386_cygwin_tdep (void); void _initialize_i386_cygwin_tdep (void) { gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour, i386_cygwin_osabi_sniffer); /* Cygwin uses elf core dumps. */ gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour, i386_cygwin_osabi_sniffer); gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN, i386_cygwin_init_abi); }