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* arm-wince-tdep.c (arm_wince_skip_main_prologue): New. 

(arm_wince_init_abi): Register it as gdbarch_skip_main_prologue
	callback.
This commit is contained in:
Pedro Alves 2009-07-05 21:23:43 +00:00
parent 7437790a92
commit d7117c03b0
2 changed files with 43 additions and 0 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
2009-07-05 Pedro Alves <pedro@codesourcery.com>
* arm-wince-tdep.c (arm_wince_skip_main_prologue): New.
(arm_wince_init_abi): Register it as gdbarch_skip_main_prologue
callback.
2009-06-29 Tristan Gingold <gingold@adacore.com>
* i386-darwin-tdep.c (amd64_darwin_thread_state_reg_offset)

37
gdb/arm-wince-tdep.c
View File

@ -77,6 +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)
{
@ -102,6 +136,9 @@ arm_wince_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
/* 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