--- /dev/null
+/* ARM Symbian OS target support.
+
+ Copyright (C) 2008, 2009, 2010
+ 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 "frame.h"
+#include "objfiles.h"
+#include "osabi.h"
+#include "solib.h"
+#include "solib-target.h"
+#include "target.h"
+#include "elf-bfd.h"
+
+/* If PC is in a DLL import stub, return the address of the `real'
+ function belonging to the stub. */
+
+CORE_ADDR
+arm_symbian_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
+{
+ struct gdbarch *gdbarch;
+ enum bfd_endian byte_order;
+ ULONGEST insn;
+ CORE_ADDR dest;
+ gdb_byte buf[4];
+
+ if (!in_plt_section (pc, NULL))
+ return 0;
+
+ if (target_read_memory (pc, buf, 4) != 0)
+ return 0;
+
+ gdbarch = get_frame_arch (frame);
+ byte_order = gdbarch_byte_order (gdbarch);
+
+ /* ldr pc, [pc, #-4]. */
+ insn = extract_unsigned_integer (buf, 4, byte_order);
+ if (insn != 0xe51ff004)
+ return 0;
+
+ if (target_read_memory (pc + 4, buf, 4) != 0)
+ return 0;
+
+ dest = extract_unsigned_integer (buf, 4, byte_order);
+ return gdbarch_addr_bits_remove (gdbarch, dest);
+}
+
+static void
+arm_symbian_init_abi (struct gdbarch_info info,
+ struct gdbarch *gdbarch)
+{
+ struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
+
+ /* Shared library handling. */
+ set_gdbarch_skip_trampoline_code (gdbarch, arm_symbian_skip_trampoline_code);
+
+ set_solib_ops (gdbarch, &solib_target_so_ops);
+}
+
+/* Recognize Symbian object files. */
+
+static enum gdb_osabi
+arm_symbian_osabi_sniffer (bfd *abfd)
+{
+ Elf_Internal_Phdr *phdrs, **segments;
+ long phdrs_size;
+ int num_phdrs, i;
+
+ /* Symbian executables are always shared objects (ET_DYN). */
+ if (elf_elfheader (abfd)->e_type == ET_EXEC)
+ return GDB_OSABI_UNKNOWN;
+
+ if (elf_elfheader (abfd)->e_ident[EI_OSABI] != ELFOSABI_NONE)
+ return GDB_OSABI_UNKNOWN;
+
+ /* Check for the ELF headers not being part of any PT_LOAD segment.
+ Symbian is the only GDB supported (or GNU binutils supported) ARM
+ target which uses a postlinker to flatten ELF files, dropping the
+ ELF dynamic info in the process. */
+ phdrs_size = bfd_get_elf_phdr_upper_bound (abfd);
+ if (phdrs_size == -1)
+ return GDB_OSABI_UNKNOWN;
+
+ phdrs = alloca (phdrs_size);
+ num_phdrs = bfd_get_elf_phdrs (abfd, phdrs);
+ if (num_phdrs == -1)
+ return GDB_OSABI_UNKNOWN;
+
+ for (i = 0; i < num_phdrs; i++)
+ if (phdrs[i].p_type == PT_LOAD && phdrs[i].p_offset == 0)
+ return GDB_OSABI_UNKNOWN;
+
+ /* Looks like a Symbian binary. */
+ return GDB_OSABI_SYMBIAN;
+}
+
+void
+_initialize_arm_symbian_tdep (void)
+{
+ gdbarch_register_osabi_sniffer (bfd_arch_arm,
+ bfd_target_elf_flavour,
+ arm_symbian_osabi_sniffer);
+
+ gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_SYMBIAN,
+ arm_symbian_init_abi);
+}
projects / deliverable / binutils-gdb.git / commitdiff
