X-Git-Url: https://git.libre-soc.org/?a=blobdiff_plain;f=gdb%2Farm-wince-tdep.c;h=1bf28f84adb98c75871287346bd50e76d216dfab;hb=58b61394cfd1f96444c1debd9ba9e0ea69d439f2;hp=dd7e3efed5d703da02d4bee1cfa68452d24f8b20;hpb=6dc134122f43d3607284c0e372e239321b4ab7fb;p=binutils-gdb.git diff --git a/gdb/arm-wince-tdep.c b/gdb/arm-wince-tdep.c index dd7e3efed5d..1bf28f84adb 100644 --- a/gdb/arm-wince-tdep.c +++ b/gdb/arm-wince-tdep.c @@ -1,7 +1,7 @@ /* 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. @@ -22,6 +22,9 @@ #include "osabi.h" #include "gdbcore.h" #include "target.h" +#include "solib.h" +#include "solib-target.h" +#include "frame.h" #include "gdb_string.h" @@ -37,6 +40,8 @@ static const char arm_wince_thumb_le_breakpoint[] = { 0xfe, 0xdf }; 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; @@ -48,11 +53,11 @@ arm_pe_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) .dw __imp_ */ 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; @@ -64,7 +69,7 @@ arm_pe_skip_trampoline_code (struct frame_info *frame, CORE_ADDR pc) 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; @@ -72,6 +77,40 @@ arm_pe_skip_trampoline_code (struct frame_info *frame, CORE_ADDR 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. */ + +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) { @@ -92,10 +131,18 @@ arm_wince_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) 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); + + /* 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