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[/] [openrisc/] [trunk/] [gnu-src/] [gdb-6.8/] [gdb/] [arm-wince-tdep.c] - Blame information for rev 233

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1 24 jeremybenn
/* Target-dependent code for Windows CE running on ARM processors,
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   for GDB.
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   Copyright (C) 2007, 2008 Free Software Foundation, Inc.
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   This file is part of GDB.
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   This program is free software; you can redistribute it and/or modify
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   it under the terms of the GNU General Public License as published by
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   the Free Software Foundation; either version 3 of the License, or
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   (at your option) any later version.
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   This program is distributed in the hope that it will be useful,
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   but WITHOUT ANY WARRANTY; without even the implied warranty of
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   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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   GNU General Public License for more details.
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   You should have received a copy of the GNU General Public License
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   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
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#include "defs.h"
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#include "osabi.h"
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#include "gdbcore.h"
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#include "target.h"
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#include "solib.h"
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#include "solib-target.h"
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#include "gdb_string.h"
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#include "arm-tdep.h"
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static const char arm_wince_le_breakpoint[] = { 0x10, 0x00, 0x00, 0xe6 };
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static const char arm_wince_thumb_le_breakpoint[] = { 0xfe, 0xdf };
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/* Description of the longjmp buffer.  */
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#define ARM_WINCE_JB_ELEMENT_SIZE       INT_REGISTER_SIZE
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#define ARM_WINCE_JB_PC                 10
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static CORE_ADDR
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arm_pe_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
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{
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  ULONGEST indirect;
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  struct minimal_symbol *indsym;
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  char *symname;
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  CORE_ADDR next_pc;
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  /* The format of an ARM DLL trampoline is:
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       ldr  ip, [pc]
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       ldr  pc, [ip]
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       .dw __imp_<func>  */
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  if (pc == 0
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      || read_memory_unsigned_integer (pc + 0, 4) != 0xe59fc000
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      || read_memory_unsigned_integer (pc + 4, 4) != 0xe59cf000)
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    return 0;
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  indirect = read_memory_unsigned_integer (pc + 8, 4);
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  if (indirect == 0)
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    return 0;
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  indsym = lookup_minimal_symbol_by_pc (indirect);
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  if (indsym == NULL)
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    return 0;
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  symname = SYMBOL_LINKAGE_NAME (indsym);
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  if (symname == NULL || strncmp (symname, "__imp_", 6) != 0)
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    return 0;
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  next_pc = read_memory_unsigned_integer (indirect, 4);
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  if (next_pc != 0)
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    return next_pc;
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  /* Check with the default arm gdbarch_skip_trampoline.  */
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  return arm_skip_stub (frame, pc);
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}
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static void
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arm_wince_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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{
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  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
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  tdep->arm_breakpoint = arm_wince_le_breakpoint;
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  tdep->arm_breakpoint_size = sizeof (arm_wince_le_breakpoint);
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  tdep->thumb_breakpoint = arm_wince_thumb_le_breakpoint;
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  tdep->thumb_breakpoint_size = sizeof (arm_wince_thumb_le_breakpoint);
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  tdep->struct_return = pcc_struct_return;
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  tdep->fp_model = ARM_FLOAT_SOFT_VFP;
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  tdep->jb_pc = ARM_WINCE_JB_PC;
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  tdep->jb_elt_size = ARM_WINCE_JB_ELEMENT_SIZE;
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  /* On ARM WinCE char defaults to signed.  */
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  set_gdbarch_char_signed (gdbarch, 1);
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  /* Shared library handling.  */
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  set_solib_ops (gdbarch, &solib_target_so_ops);
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  set_gdbarch_skip_trampoline_code (gdbarch, arm_pe_skip_trampoline_code);
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  /* Single stepping.  */
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  set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
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}
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static enum gdb_osabi
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arm_wince_osabi_sniffer (bfd *abfd)
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{
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  const char *target_name = bfd_get_target (abfd);
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  if (strcmp (target_name, "pei-arm-wince-little") == 0)
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    return GDB_OSABI_WINCE;
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  return GDB_OSABI_UNKNOWN;
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}
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/* Provide a prototype to silence -Wmissing-prototypes.  */
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void _initialize_arm_wince_tdep (void);
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void
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_initialize_arm_wince_tdep (void)
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{
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  gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_coff_flavour,
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                                  arm_wince_osabi_sniffer);
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  gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_WINCE,
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                          arm_wince_init_abi);
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}

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