/* Target-dependent code for Windows CE running on ARM processors,
for GDB.
- Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
+ Copyright (C) 2007-2014 Free Software Foundation, Inc.
This file is part of GDB.
#include "osabi.h"
#include "gdbcore.h"
#include "target.h"
-#include "solib.h"
-#include "solib-target.h"
-
-#include "gdb_string.h"
+#include "frame.h"
#include "arm-tdep.h"
+#include "windows-tdep.h"
-static const char arm_wince_le_breakpoint[] = { 0x10, 0x00, 0x00, 0xe6 };
-static const char arm_wince_thumb_le_breakpoint[] = { 0xfe, 0xdf };
+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
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 minimal_symbol *indsym;
- char *symname;
+ 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> */
+ .dw __imp_<func>
+
+ */
if (pc == 0
- || read_memory_unsigned_integer (pc + 0, 4) != 0xe59fc000
- || read_memory_unsigned_integer (pc + 4, 4) != 0xe59cf000)
+ || 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);
+ indirect = read_memory_unsigned_integer (pc + 8, 4, byte_order);
if (indirect == 0)
return 0;
indsym = lookup_minimal_symbol_by_pc (indirect);
- if (indsym == NULL)
+ if (indsym.minsym == NULL)
return 0;
- symname = SYMBOL_LINKAGE_NAME (indsym);
+ symname = MSYMBOL_LINKAGE_NAME (indsym.minsym);
if (symname == NULL || strncmp (symname, "__imp_", 6) != 0)
return 0;
- next_pc = read_memory_unsigned_integer (indirect, 4);
+ next_pc = read_memory_unsigned_integer (indirect, 4, byte_order);
if (next_pc != 0)
return next_pc;
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;
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);
+
+ /* Skip call to __gccmain that gcc places in main. */
+ set_gdbarch_skip_main_prologue (gdbarch, arm_wince_skip_main_prologue);
}
static enum gdb_osabi