| /* Target-dependent code for Windows (including Cygwin) running on i386's, |
| for GDB. |
| |
| Copyright (C) 2003-2021 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 "i386-tdep.h" |
| #include "windows-tdep.h" |
| #include "regset.h" |
| #include "gdb_obstack.h" |
| #include "xml-support.h" |
| #include "gdbcore.h" |
| #include "inferior.h" |
| |
| /* Core file support. */ |
| |
| /* This vector maps GDB's idea of a register's number into an address |
| in the windows exception context vector. */ |
| |
| static int i386_windows_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_WINDOWS_SIZEOF_GREGSET 716 |
| |
| static CORE_ADDR |
| i386_windows_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) |
| { |
| return i386_pe_skip_trampoline_code (frame, pc, NULL); |
| } |
| |
| static const char * |
| i386_windows_auto_wide_charset (void) |
| { |
| return "UTF-16"; |
| } |
| |
| /* Implement the "push_dummy_call" gdbarch method. */ |
| |
| static CORE_ADDR |
| i386_windows_push_dummy_call (struct gdbarch *gdbarch, struct value *function, |
| struct regcache *regcache, CORE_ADDR bp_addr, |
| int nargs, struct value **args, CORE_ADDR sp, |
| function_call_return_method return_method, |
| CORE_ADDR struct_addr) |
| { |
| /* For non-static member functions of 32bit Windows programs, the thiscall |
| calling convention is used, so the 'this' pointer is passed in ECX. */ |
| bool thiscall = false; |
| |
| struct type *type = check_typedef (value_type (function)); |
| if (type->code () == TYPE_CODE_PTR) |
| type = check_typedef (TYPE_TARGET_TYPE (type)); |
| |
| /* read_subroutine_type sets for non-static member functions the |
| artificial flag of the first parameter ('this' pointer). */ |
| if (type->code () == TYPE_CODE_METHOD |
| && type->num_fields () > 0 |
| && TYPE_FIELD_ARTIFICIAL (type, 0) |
| && type->field (0).type ()->code () == TYPE_CODE_PTR) |
| thiscall = 1; |
| |
| return i386_thiscall_push_dummy_call (gdbarch, function, regcache, bp_addr, |
| nargs, args, sp, return_method, |
| struct_addr, thiscall); |
| } |
| |
| /* Common parts for gdbarch initialization for Windows and Cygwin on i386. */ |
| |
| static void |
| i386_windows_init_abi_common (struct gdbarch_info info, struct gdbarch *gdbarch) |
| { |
| struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch); |
| |
| set_gdbarch_skip_trampoline_code (gdbarch, i386_windows_skip_trampoline_code); |
| |
| set_gdbarch_skip_main_prologue (gdbarch, i386_skip_main_prologue); |
| |
| tdep->struct_return = reg_struct_return; |
| |
| tdep->gregset_reg_offset = i386_windows_gregset_reg_offset; |
| tdep->gregset_num_regs = ARRAY_SIZE (i386_windows_gregset_reg_offset); |
| tdep->sizeof_gregset = I386_WINDOWS_SIZEOF_GREGSET; |
| |
| tdep->sizeof_fpregset = 0; |
| |
| /* Core file support. */ |
| set_gdbarch_core_xfer_shared_libraries |
| (gdbarch, windows_core_xfer_shared_libraries); |
| set_gdbarch_core_pid_to_str (gdbarch, windows_core_pid_to_str); |
| |
| set_gdbarch_auto_wide_charset (gdbarch, i386_windows_auto_wide_charset); |
| } |
| |
| /* gdbarch initialization for Windows on i386. */ |
| |
| static void |
| i386_windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| { |
| i386_windows_init_abi_common (info, gdbarch); |
| windows_init_abi (info, gdbarch); |
| |
| set_gdbarch_push_dummy_call (gdbarch, i386_windows_push_dummy_call); |
| } |
| |
| /* gdbarch initialization for Cygwin on i386. */ |
| |
| static void |
| i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) |
| { |
| i386_windows_init_abi_common (info, gdbarch); |
| cygwin_init_abi (info, gdbarch); |
| } |
| |
| static gdb_osabi |
| i386_windows_osabi_sniffer (bfd *abfd) |
| { |
| const char *target_name = bfd_get_target (abfd); |
| |
| if (!streq (target_name, "pei-i386")) |
| return GDB_OSABI_UNKNOWN; |
| |
| if (is_linked_with_cygwin_dll (abfd)) |
| return GDB_OSABI_CYGWIN; |
| |
| return GDB_OSABI_WINDOWS; |
| } |
| |
| static enum gdb_osabi |
| i386_cygwin_core_osabi_sniffer (bfd *abfd) |
| { |
| const char *target_name = bfd_get_target (abfd); |
| |
| /* Cygwin uses elf core dumps. Do not claim all ELF executables, |
| check whether there is a .reg section of proper size. */ |
| if (strcmp (target_name, "elf32-i386") == 0) |
| { |
| asection *section = bfd_get_section_by_name (abfd, ".reg"); |
| if (section != nullptr |
| && bfd_section_size (section) == I386_WINDOWS_SIZEOF_GREGSET) |
| return GDB_OSABI_CYGWIN; |
| } |
| |
| return GDB_OSABI_UNKNOWN; |
| } |
| |
| void _initialize_i386_windows_tdep (); |
| void |
| _initialize_i386_windows_tdep () |
| { |
| gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour, |
| i386_windows_osabi_sniffer); |
| |
| /* Cygwin uses elf core dumps. */ |
| gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour, |
| i386_cygwin_core_osabi_sniffer); |
| |
| gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_WINDOWS, |
| i386_windows_init_abi); |
| gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN, |
| i386_cygwin_init_abi); |
| } |