/* Target-dependent code for Cygwin running on i386's, for GDB.
- Copyright 2003 Free Software Foundation, Inc.
+ Copyright (C) 2003-2019 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 2 of the License, or
+ 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,
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, write to the Free Software
- Foundation, Inc., 59 Temple Place - Suite 330,
- Boston, MA 02111-1307, USA. */
+ 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"
-#include "gdb_string.h"
+/* Core file support. */
-#include "i386-tdep.h"
+/* 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
+
+struct cpms_data
+{
+ struct gdbarch *gdbarch;
+ struct obstack *obstack;
+ int module_count;
+};
+
+static void
+core_process_module_section (bfd *abfd, asection *sect, void *obj)
+{
+ struct cpms_data *data = (struct cpms_data *) obj;
+ enum bfd_endian byte_order = gdbarch_byte_order (data->gdbarch);
+
+ char *module_name;
+ size_t module_name_size;
+ CORE_ADDR base_addr;
+
+ gdb_byte *buf = NULL;
+
+ if (!startswith (sect->name, ".module"))
+ return;
+
+ buf = (gdb_byte *) xmalloc (bfd_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_section_size (sect)))
+ goto out;
+
+
+
+ /* A DWORD (data_type) followed by struct windows_core_module_info. */
+
+ base_addr =
+ extract_unsigned_integer (buf + 4, 4, byte_order);
+
+ module_name_size =
+ extract_unsigned_integer (buf + 8, 4, byte_order);
+
+ if (12 + module_name_size > bfd_section_size (sect))
+ goto out;
+ module_name = (char *) buf + 12;
+
+ /* The first module is the .exe itself. */
+ if (data->module_count != 0)
+ windows_xfer_shared_library (module_name, base_addr,
+ data->gdbarch, data->obstack);
+ data->module_count++;
+
+out:
+ if (buf)
+ xfree (buf);
+ return;
+}
+
+static ULONGEST
+windows_core_xfer_shared_libraries (struct gdbarch *gdbarch,
+ gdb_byte *readbuf,
+ ULONGEST offset, ULONGEST len)
+{
+ struct obstack obstack;
+ const char *buf;
+ ULONGEST len_avail;
+ struct cpms_data data = { gdbarch, &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 = (const char *) 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;
+}
+
+/* This is how we want PTIDs from core files to be printed. */
+
+static std::string
+i386_windows_core_pid_to_str (struct gdbarch *gdbarch, ptid_t ptid)
+{
+ if (ptid.lwp () != 0)
+ return string_printf ("Thread 0x%lx", ptid.lwp ());
+
+ return normal_pid_to_str (ptid);
+}
+
+static CORE_ADDR
+i386_cygwin_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
+{
+ return i386_pe_skip_trampoline_code (frame, pc, NULL);
+}
+
+static const char *
+i386_cygwin_auto_wide_charset (void)
+{
+ return "UTF-16";
+}
static void
i386_cygwin_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
{
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
- i386_coff_init_abi (info, gdbarch);
+ windows_init_abi (info, gdbarch);
+
+ set_gdbarch_skip_trampoline_code (gdbarch, i386_cygwin_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, i386_windows_core_pid_to_str);
+
+ set_gdbarch_auto_wide_charset (gdbarch, i386_cygwin_auto_wide_charset);
}
static enum gdb_osabi
-i386_cygwin_osabi_sniffer (bfd * abfd)
-{
- char *target_name = bfd_get_target (abfd);
+i386_cygwin_osabi_sniffer (bfd *abfd)
+{
+ const 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. 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
+ && bfd_section_size (section) == I386_WINDOWS_SIZEOF_GREGSET)
+ 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);
}
projects / thirdparty / binutils-gdb.git / blobdiff