/* Target-dependent code for Cygwin running on i386's, for GDB.
- Copyright 2003 Free Software Foundation, Inc.
+ Copyright (C) 2003, 2007, 2008 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 "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);
+
+ set_gdbarch_skip_main_prologue (gdbarch, i386_skip_main_prologue);
+
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)
-{
+i386_cygwin_osabi_sniffer (bfd *abfd)
+{
char *target_name = bfd_get_target (abfd);
- /* Interix also uses pei-i386.
+ /* 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 (abfd, section) == I386_WIN32_SIZEOF_GREGSET)
+ return GDB_OSABI_CYGWIN;
+ }
+
return GDB_OSABI_UNKNOWN;
}
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 / deliverable / binutils-gdb.git / blobdiff