1 /* Target-dependent code for Windows CE running on ARM processors,
4 Copyright (C) 2007 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 "gdb_string.h"
30 static const char arm_wince_le_breakpoint[] = { 0x10, 0x00, 0x00, 0xe6 };
31 static const char arm_wince_thumb_le_breakpoint[] = { 0xfe, 0xdf };
33 /* Description of the longjmp buffer. */
34 #define ARM_WINCE_JB_ELEMENT_SIZE INT_REGISTER_SIZE
35 #define ARM_WINCE_JB_PC 10
38 arm_pe_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
41 struct minimal_symbol *indsym;
45 /* The format of an ARM DLL trampoline is:
51 || read_memory_unsigned_integer (pc + 0, 4) != 0xe59fc000
52 || read_memory_unsigned_integer (pc + 4, 4) != 0xe59cf000)
55 indirect = read_memory_unsigned_integer (pc + 8, 4);
59 indsym = lookup_minimal_symbol_by_pc (indirect);
63 symname = SYMBOL_LINKAGE_NAME (indsym);
64 if (symname == NULL || strncmp (symname, "__imp_", 6) != 0)
67 next_pc = read_memory_unsigned_integer (indirect, 4);
71 /* Check with the default arm gdbarch_skip_trampoline. */
72 return arm_skip_stub (frame, pc);
76 arm_wince_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
78 struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
80 tdep->arm_breakpoint = arm_wince_le_breakpoint;
81 tdep->arm_breakpoint_size = sizeof (arm_wince_le_breakpoint);
82 tdep->thumb_breakpoint = arm_wince_thumb_le_breakpoint;
83 tdep->thumb_breakpoint_size = sizeof (arm_wince_thumb_le_breakpoint);
84 tdep->struct_return = pcc_struct_return;
86 tdep->fp_model = ARM_FLOAT_SOFT_VFP;
88 tdep->jb_pc = ARM_WINCE_JB_PC;
89 tdep->jb_elt_size = ARM_WINCE_JB_ELEMENT_SIZE;
91 /* On ARM WinCE char defaults to signed. */
92 set_gdbarch_char_signed (gdbarch, 1);
94 /* Shared library handling. */
95 set_gdbarch_skip_trampoline_code (gdbarch, arm_pe_skip_trampoline_code);
97 /* Single stepping. */
98 set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
101 static enum gdb_osabi
102 arm_wince_osabi_sniffer (bfd *abfd)
104 const char *target_name = bfd_get_target (abfd);
106 if (strcmp (target_name, "pei-arm-wince-little") == 0)
107 return GDB_OSABI_WINCE;
109 return GDB_OSABI_UNKNOWN;
112 /* Provide a prototype to silence -Wmissing-prototypes. */
113 void _initialize_arm_wince_tdep (void);
116 _initialize_arm_wince_tdep (void)
118 gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_coff_flavour,
119 arm_wince_osabi_sniffer);
121 gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_WINCE,