/* Target-dependent code for Windows CE running on ARM processors,
for GDB.
- Copyright (C) 2007 Free Software Foundation, Inc.
+ Copyright (C) 2007, 2008, 2009, 2010 Free Software Foundation, Inc.
This file is part of GDB.
#include "defs.h"
#include "osabi.h"
-#include "solib-svr4.h"
+#include "gdbcore.h"
#include "target.h"
+#include "solib.h"
+#include "solib-target.h"
+#include "frame.h"
#include "gdb_string.h"
/* Description of the longjmp buffer. */
#define ARM_WINCE_JB_ELEMENT_SIZE INT_REGISTER_SIZE
-#define ARM_WINCE_JB_PC 21
+#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 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, 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 == 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, 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. */
+
+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 minimal_symbol *s = lookup_minimal_symbol_by_pc (call_dest);
+
+ if (s != NULL
+ && SYMBOL_LINKAGE_NAME (s) != NULL
+ && strcmp (SYMBOL_LINKAGE_NAME (s), "__gccmain") == 0)
+ pc += 4;
+ }
+
+ return pc;
+}
static void
arm_wince_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_gdbarch_char_signed (gdbarch, 1);
/* Shared library handling. */
- set_gdbarch_skip_trampoline_code (gdbarch, find_solib_trampoline_target);
+ 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);
+
+ /* Canonical paths on this target look like `\Windows\coredll.dll',
+ for example. */
+ set_gdbarch_has_dos_based_file_system (gdbarch, 1);
}
static enum gdb_osabi