1 /* ARM Symbian OS target support.
3 Copyright (C) 2008, 2009, 2010
4 Free Software Foundation, Inc.
6 This file is part of GDB.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program. If not, see <http://www.gnu.org/licenses/>. */
26 #include "solib-target.h"
30 /* If PC is in a DLL import stub, return the address of the `real'
31 function belonging to the stub. */
34 arm_symbian_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
36 struct gdbarch *gdbarch;
37 enum bfd_endian byte_order;
42 if (!in_plt_section (pc, NULL))
45 if (target_read_memory (pc, buf, 4) != 0)
48 gdbarch = get_frame_arch (frame);
49 byte_order = gdbarch_byte_order (gdbarch);
51 /* ldr pc, [pc, #-4]. */
52 insn = extract_unsigned_integer (buf, 4, byte_order);
53 if (insn != 0xe51ff004)
56 if (target_read_memory (pc + 4, buf, 4) != 0)
59 dest = extract_unsigned_integer (buf, 4, byte_order);
60 return gdbarch_addr_bits_remove (gdbarch, dest);
64 arm_symbian_init_abi (struct gdbarch_info info,
65 struct gdbarch *gdbarch)
67 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
69 /* Shared library handling. */
70 set_gdbarch_skip_trampoline_code (gdbarch, arm_symbian_skip_trampoline_code);
72 set_solib_ops (gdbarch, &solib_target_so_ops);
75 /* Recognize Symbian object files. */
78 arm_symbian_osabi_sniffer (bfd *abfd)
80 Elf_Internal_Phdr *phdrs, **segments;
84 /* Symbian executables are always shared objects (ET_DYN). */
85 if (elf_elfheader (abfd)->e_type == ET_EXEC)
86 return GDB_OSABI_UNKNOWN;
88 if (elf_elfheader (abfd)->e_ident[EI_OSABI] != ELFOSABI_NONE)
89 return GDB_OSABI_UNKNOWN;
91 /* Check for the ELF headers not being part of any PT_LOAD segment.
92 Symbian is the only GDB supported (or GNU binutils supported) ARM
93 target which uses a postlinker to flatten ELF files, dropping the
94 ELF dynamic info in the process. */
95 phdrs_size = bfd_get_elf_phdr_upper_bound (abfd);
97 return GDB_OSABI_UNKNOWN;
99 phdrs = alloca (phdrs_size);
100 num_phdrs = bfd_get_elf_phdrs (abfd, phdrs);
102 return GDB_OSABI_UNKNOWN;
104 for (i = 0; i < num_phdrs; i++)
105 if (phdrs[i].p_type == PT_LOAD && phdrs[i].p_offset == 0)
106 return GDB_OSABI_UNKNOWN;
108 /* Looks like a Symbian binary. */
109 return GDB_OSABI_SYMBIAN;
113 _initialize_arm_symbian_tdep (void)
115 gdbarch_register_osabi_sniffer (bfd_arch_arm,
116 bfd_target_elf_flavour,
117 arm_symbian_osabi_sniffer);
119 gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_SYMBIAN,
120 arm_symbian_init_abi);