mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-06 03:16:45 +00:00
127 lines
3.6 KiB
C
127 lines
3.6 KiB
C
/* Target-dependent code for Windows CE running on ARM processors,
|
|
for GDB.
|
|
|
|
Copyright (C) 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 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 "osabi.h"
|
|
#include "gdbcore.h"
|
|
#include "target.h"
|
|
#include "solib.h"
|
|
#include "solib-target.h"
|
|
|
|
#include "gdb_string.h"
|
|
|
|
#include "arm-tdep.h"
|
|
|
|
static const char arm_wince_le_breakpoint[] = { 0x10, 0x00, 0x00, 0xe6 };
|
|
static const char arm_wince_thumb_le_breakpoint[] = { 0xfe, 0xdf };
|
|
|
|
/* Description of the longjmp buffer. */
|
|
#define ARM_WINCE_JB_ELEMENT_SIZE INT_REGISTER_SIZE
|
|
#define ARM_WINCE_JB_PC 10
|
|
|
|
static CORE_ADDR
|
|
arm_pe_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc)
|
|
{
|
|
ULONGEST indirect;
|
|
struct minimal_symbol *indsym;
|
|
char *symname;
|
|
CORE_ADDR next_pc;
|
|
|
|
/* The format of an ARM DLL trampoline is:
|
|
ldr ip, [pc]
|
|
ldr pc, [ip]
|
|
.dw __imp_<func> */
|
|
|
|
if (pc == 0
|
|
|| read_memory_unsigned_integer (pc + 0, 4) != 0xe59fc000
|
|
|| read_memory_unsigned_integer (pc + 4, 4) != 0xe59cf000)
|
|
return 0;
|
|
|
|
indirect = read_memory_unsigned_integer (pc + 8, 4);
|
|
if (indirect == 0)
|
|
return 0;
|
|
|
|
indsym = lookup_minimal_symbol_by_pc (indirect);
|
|
if (indsym == NULL)
|
|
return 0;
|
|
|
|
symname = SYMBOL_LINKAGE_NAME (indsym);
|
|
if (symname == NULL || strncmp (symname, "__imp_", 6) != 0)
|
|
return 0;
|
|
|
|
next_pc = read_memory_unsigned_integer (indirect, 4);
|
|
if (next_pc != 0)
|
|
return next_pc;
|
|
|
|
/* Check with the default arm gdbarch_skip_trampoline. */
|
|
return arm_skip_stub (frame, pc);
|
|
}
|
|
|
|
static void
|
|
arm_wince_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
|
{
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
tdep->arm_breakpoint = arm_wince_le_breakpoint;
|
|
tdep->arm_breakpoint_size = sizeof (arm_wince_le_breakpoint);
|
|
tdep->thumb_breakpoint = arm_wince_thumb_le_breakpoint;
|
|
tdep->thumb_breakpoint_size = sizeof (arm_wince_thumb_le_breakpoint);
|
|
tdep->struct_return = pcc_struct_return;
|
|
|
|
tdep->fp_model = ARM_FLOAT_SOFT_VFP;
|
|
|
|
tdep->jb_pc = ARM_WINCE_JB_PC;
|
|
tdep->jb_elt_size = ARM_WINCE_JB_ELEMENT_SIZE;
|
|
|
|
/* On ARM WinCE char defaults to signed. */
|
|
set_gdbarch_char_signed (gdbarch, 1);
|
|
|
|
/* Shared library handling. */
|
|
set_solib_ops (gdbarch, &solib_target_so_ops);
|
|
set_gdbarch_skip_trampoline_code (gdbarch, arm_pe_skip_trampoline_code);
|
|
|
|
/* Single stepping. */
|
|
set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
|
|
}
|
|
|
|
static enum gdb_osabi
|
|
arm_wince_osabi_sniffer (bfd *abfd)
|
|
{
|
|
const char *target_name = bfd_get_target (abfd);
|
|
|
|
if (strcmp (target_name, "pei-arm-wince-little") == 0)
|
|
return GDB_OSABI_WINCE;
|
|
|
|
return GDB_OSABI_UNKNOWN;
|
|
}
|
|
|
|
/* Provide a prototype to silence -Wmissing-prototypes. */
|
|
void _initialize_arm_wince_tdep (void);
|
|
|
|
void
|
|
_initialize_arm_wince_tdep (void)
|
|
{
|
|
gdbarch_register_osabi_sniffer (bfd_arch_arm, bfd_target_coff_flavour,
|
|
arm_wince_osabi_sniffer);
|
|
|
|
gdbarch_register_osabi (bfd_arch_arm, 0, GDB_OSABI_WINCE,
|
|
arm_wince_init_abi);
|
|
}
|