mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-15 04:31:49 +08:00
bf31fd38f0
This moves the gdb-specific obstack code -- both extensions like obconcat and obstack_strdup, and things like auto_obstack -- to gdbsupport.
229 lines
6.6 KiB
C
229 lines
6.6 KiB
C
/* Target-dependent code for Windows (including Cygwin) running on i386's,
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for GDB.
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Copyright (C) 2003-2022 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "osabi.h"
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#include "i386-tdep.h"
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#include "windows-tdep.h"
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#include "regset.h"
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#include "gdbsupport/gdb_obstack.h"
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#include "xml-support.h"
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#include "gdbcore.h"
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#include "inferior.h"
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/* Core file support. */
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/* This vector maps GDB's idea of a register's number into an address
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in the windows exception context vector. */
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static int i386_windows_gregset_reg_offset[] =
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{
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176, /* eax */
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172, /* ecx */
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168, /* edx */
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164, /* ebx */
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196, /* esp */
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180, /* ebp */
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160, /* esi */
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156, /* edi */
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184, /* eip */
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192, /* eflags */
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188, /* cs */
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200, /* ss */
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152, /* ds */
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148, /* es */
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144, /* fs */
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140, /* gs */
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56, /* FloatSave.RegisterArea[0 * 10] */
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66, /* FloatSave.RegisterArea[1 * 10] */
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76, /* FloatSave.RegisterArea[2 * 10] */
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86, /* FloatSave.RegisterArea[3 * 10] */
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96, /* FloatSave.RegisterArea[4 * 10] */
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106, /* FloatSave.RegisterArea[5 * 10] */
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116, /* FloatSave.RegisterArea[6 * 10] */
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126, /* FloatSave.RegisterArea[7 * 10] */
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28, /* FloatSave.ControlWord */
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32, /* FloatSave.StatusWord */
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36, /* FloatSave.TagWord */
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44, /* FloatSave.ErrorSelector */
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40, /* FloatSave.ErrorOffset */
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52, /* FloatSave.DataSelector */
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48, /* FloatSave.DataOffset */
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44, /* FloatSave.ErrorSelector */
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/* XMM0-7 */
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364, /* ExtendedRegisters[10*16] */
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380, /* ExtendedRegisters[11*16] */
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396, /* ExtendedRegisters[12*16] */
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412, /* ExtendedRegisters[13*16] */
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428, /* ExtendedRegisters[14*16] */
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444, /* ExtendedRegisters[15*16] */
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460, /* ExtendedRegisters[16*16] */
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476, /* ExtendedRegisters[17*16] */
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/* MXCSR */
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228 /* ExtendedRegisters[24] */
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};
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#define I386_WINDOWS_SIZEOF_GREGSET 716
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static CORE_ADDR
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i386_windows_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
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{
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return i386_pe_skip_trampoline_code (frame, pc, NULL);
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}
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static const char *
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i386_windows_auto_wide_charset (void)
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{
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return "UTF-16";
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}
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/* Implement the "push_dummy_call" gdbarch method. */
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static CORE_ADDR
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i386_windows_push_dummy_call (struct gdbarch *gdbarch, struct value *function,
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struct regcache *regcache, CORE_ADDR bp_addr,
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int nargs, struct value **args, CORE_ADDR sp,
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function_call_return_method return_method,
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CORE_ADDR struct_addr)
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{
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/* For non-static member functions of 32bit Windows programs, the thiscall
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calling convention is used, so the 'this' pointer is passed in ECX. */
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bool thiscall = false;
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struct type *type = check_typedef (value_type (function));
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if (type->code () == TYPE_CODE_PTR)
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type = check_typedef (TYPE_TARGET_TYPE (type));
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/* read_subroutine_type sets for non-static member functions the
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artificial flag of the first parameter ('this' pointer). */
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if (type->code () == TYPE_CODE_METHOD
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&& type->num_fields () > 0
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&& TYPE_FIELD_ARTIFICIAL (type, 0)
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&& type->field (0).type ()->code () == TYPE_CODE_PTR)
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thiscall = 1;
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return i386_thiscall_push_dummy_call (gdbarch, function, regcache, bp_addr,
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nargs, args, sp, return_method,
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struct_addr, thiscall);
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}
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/* Common parts for gdbarch initialization for Windows and Cygwin on i386. */
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static void
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i386_windows_init_abi_common (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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i386_gdbarch_tdep *tdep = (i386_gdbarch_tdep *) gdbarch_tdep (gdbarch);
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set_gdbarch_skip_trampoline_code (gdbarch, i386_windows_skip_trampoline_code);
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set_gdbarch_skip_main_prologue (gdbarch, i386_skip_main_prologue);
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tdep->struct_return = reg_struct_return;
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tdep->gregset_reg_offset = i386_windows_gregset_reg_offset;
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tdep->gregset_num_regs = ARRAY_SIZE (i386_windows_gregset_reg_offset);
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tdep->sizeof_gregset = I386_WINDOWS_SIZEOF_GREGSET;
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tdep->sizeof_fpregset = 0;
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/* Core file support. */
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set_gdbarch_core_xfer_shared_libraries
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(gdbarch, windows_core_xfer_shared_libraries);
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set_gdbarch_core_pid_to_str (gdbarch, windows_core_pid_to_str);
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set_gdbarch_auto_wide_charset (gdbarch, i386_windows_auto_wide_charset);
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}
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/* gdbarch initialization for Windows on i386. */
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static void
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i386_windows_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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i386_windows_init_abi_common (info, gdbarch);
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windows_init_abi (info, gdbarch);
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set_gdbarch_push_dummy_call (gdbarch, i386_windows_push_dummy_call);
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}
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/* gdbarch initialization for Cygwin on i386. */
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static void
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i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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i386_windows_init_abi_common (info, gdbarch);
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cygwin_init_abi (info, gdbarch);
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}
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static gdb_osabi
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i386_windows_osabi_sniffer (bfd *abfd)
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{
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const char *target_name = bfd_get_target (abfd);
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if (!streq (target_name, "pei-i386"))
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return GDB_OSABI_UNKNOWN;
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if (is_linked_with_cygwin_dll (abfd))
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return GDB_OSABI_CYGWIN;
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return GDB_OSABI_WINDOWS;
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}
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static enum gdb_osabi
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i386_cygwin_core_osabi_sniffer (bfd *abfd)
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{
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const char *target_name = bfd_get_target (abfd);
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/* Cygwin uses elf core dumps. Do not claim all ELF executables,
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check whether there is a .reg section of proper size. */
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if (strcmp (target_name, "elf32-i386") == 0)
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{
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asection *section = bfd_get_section_by_name (abfd, ".reg");
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if (section != nullptr
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&& bfd_section_size (section) == I386_WINDOWS_SIZEOF_GREGSET)
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return GDB_OSABI_CYGWIN;
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}
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return GDB_OSABI_UNKNOWN;
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}
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void _initialize_i386_windows_tdep ();
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void
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_initialize_i386_windows_tdep ()
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{
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gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
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i386_windows_osabi_sniffer);
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/* Cygwin uses elf core dumps. */
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gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
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i386_cygwin_core_osabi_sniffer);
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gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_WINDOWS,
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i386_windows_init_abi);
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gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_CYGWIN,
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i386_cygwin_init_abi);
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}
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