mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-03 04:12:10 +08:00
5f52445bfb
We would like to wrap examples, output or code snippet in comments with blank lines, and move */ to a new line if the comment is ended with the example. gdb: 2014-08-20 Yao Qi <yao@codesourcery.com> * amd64-tdep.c (amd64_classify): Add a blank line after the example. Move "*/" to a new line. * arm-tdep.c (arm_vfp_cprc_sub_candidate): Likewise. * arm-wince-tdep.c (arm_pe_skip_trampoline_code): Likewise. * dwarf2read.c (psymtab_include_file_name): Likewise.
168 lines
5.0 KiB
C
168 lines
5.0 KiB
C
/* Target-dependent code for Windows CE running on ARM processors,
|
|
for GDB.
|
|
|
|
Copyright (C) 2007-2014 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 "frame.h"
|
|
|
|
#include "arm-tdep.h"
|
|
#include "windows-tdep.h"
|
|
|
|
static const gdb_byte arm_wince_le_breakpoint[] = { 0x10, 0x00, 0x00, 0xe6 };
|
|
static const gdb_byte 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)
|
|
{
|
|
struct gdbarch *gdbarch = get_frame_arch (frame);
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
ULONGEST indirect;
|
|
struct bound_minimal_symbol indsym;
|
|
const 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, byte_order) != 0xe59fc000
|
|
|| read_memory_unsigned_integer (pc + 4, 4, byte_order) != 0xe59cf000)
|
|
return 0;
|
|
|
|
indirect = read_memory_unsigned_integer (pc + 8, 4, byte_order);
|
|
if (indirect == 0)
|
|
return 0;
|
|
|
|
indsym = lookup_minimal_symbol_by_pc (indirect);
|
|
if (indsym.minsym == NULL)
|
|
return 0;
|
|
|
|
symname = MSYMBOL_LINKAGE_NAME (indsym.minsym);
|
|
if (symname == NULL || strncmp (symname, "__imp_", 6) != 0)
|
|
return 0;
|
|
|
|
next_pc = read_memory_unsigned_integer (indirect, 4, byte_order);
|
|
if (next_pc != 0)
|
|
return next_pc;
|
|
|
|
/* Check with the default arm gdbarch_skip_trampoline. */
|
|
return arm_skip_stub (frame, pc);
|
|
}
|
|
|
|
/* GCC emits a call to __gccmain in the prologue of main.
|
|
|
|
The function below examines the code pointed at by PC and checks to
|
|
see if it corresponds to a call to __gccmain. If so, it returns
|
|
the address of the instruction following that call. Otherwise, it
|
|
simply returns PC. */
|
|
|
|
static CORE_ADDR
|
|
arm_wince_skip_main_prologue (struct gdbarch *gdbarch, CORE_ADDR pc)
|
|
{
|
|
enum bfd_endian byte_order = gdbarch_byte_order (gdbarch);
|
|
ULONGEST this_instr;
|
|
|
|
this_instr = read_memory_unsigned_integer (pc, 4, byte_order);
|
|
|
|
/* bl offset <__gccmain> */
|
|
if ((this_instr & 0xfff00000) == 0xeb000000)
|
|
{
|
|
#define sign_extend(V, N) \
|
|
(((long) (V) ^ (1L << ((N) - 1))) - (1L << ((N) - 1)))
|
|
|
|
long offset = sign_extend (this_instr & 0x000fffff, 23) << 2;
|
|
CORE_ADDR call_dest = (pc + 8 + offset) & 0xffffffffU;
|
|
struct bound_minimal_symbol s = lookup_minimal_symbol_by_pc (call_dest);
|
|
|
|
if (s.minsym != NULL
|
|
&& MSYMBOL_LINKAGE_NAME (s.minsym) != NULL
|
|
&& strcmp (MSYMBOL_LINKAGE_NAME (s.minsym), "__gccmain") == 0)
|
|
pc += 4;
|
|
}
|
|
|
|
return pc;
|
|
}
|
|
|
|
static void
|
|
arm_wince_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
|
{
|
|
struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
|
|
|
|
windows_init_abi (info, 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_gdbarch_skip_trampoline_code (gdbarch, arm_pe_skip_trampoline_code);
|
|
|
|
/* Single stepping. */
|
|
set_gdbarch_software_single_step (gdbarch, arm_software_single_step);
|
|
|
|
/* Skip call to __gccmain that gcc places in main. */
|
|
set_gdbarch_skip_main_prologue (gdbarch, arm_wince_skip_main_prologue);
|
|
}
|
|
|
|
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);
|
|
}
|