void check_nptl_setxid(Inferior inferior, Bfd bfd)
{
if (setxid_breakpoint != null)
{
return;
}
TargetAddress vtable = bfd.LookupSymbol("__libc_pthread_functions");
if (vtable.IsNull)
{
return;
}
/*
* Big big hack to allow debugging gnome-vfs:
* We intercept any calls to __nptl_setxid() and make it
* return 0. This is safe to do since we do not allow
* debugging setuid programs or running as root, so setxid()
* will always be a no-op anyways.
*/
TargetAddress nptl_setxid = inferior.ReadAddress(vtable + 51 * inferior.TargetAddressSize);
if (!nptl_setxid.IsNull)
{
setxid_breakpoint = new SetXidBreakpoint(this, nptl_setxid);
setxid_breakpoint.Insert(inferior);
}
}
protected void initialize_notifications(Inferior inferior)
{
TargetAddress executable_code_buffer = inferior.ReadAddress(
debugger_info.ExecutableCodeBuffer);
HasCodeBuffer = !executable_code_buffer.IsNull;
mono_runtime_info = mono_debugger_server_initialize_mono_runtime(
inferior.TargetAddressSize,
debugger_info.NotificationAddress.Address,
executable_code_buffer.Address,
debugger_info.ExecutableCodeBufferSize,
debugger_info.BreakpointInfo.Address,
debugger_info.BreakpointInfoIndex.Address,
debugger_info.BreakpointArraySize);
inferior.SetRuntimeInfo(mono_runtime_info);
debugger_version = inferior.ReadInteger(debugger_info.DebuggerVersion);
if (notification_bpt != null)
{
notification_bpt.Remove(inferior);
notification_bpt = null;
}
if (debugger_info.HasThreadAbortSignal)
{
thread_abort_signal = inferior.ReadInteger(debugger_info.ThreadAbortSignal);
}
else
{
thread_abort_signal = inferior.MonoThreadAbortSignal;
}
}
void read_dynamic_info(Inferior inferior)
{
if (has_dynlink_info)
{
if (!first_link_map.IsNull)
{
do_update_shlib_info(inferior);
}
return;
}
TargetAddress debug_base = main_bfd.ReadDynamicInfo(inferior);
if (debug_base.IsNull)
{
return;
}
int size = 2 * inferior.TargetLongIntegerSize + 3 * inferior.TargetAddressSize;
TargetReader reader = new TargetReader(inferior.ReadMemory(debug_base, size));
if (reader.ReadLongInteger() != 1)
{
return;
}
first_link_map = reader.ReadAddress();
dynlink_breakpoint_addr = reader.ReadAddress();
rdebug_state_addr = debug_base + reader.Offset;
if (reader.ReadLongInteger() != 0)
{
return;
}
has_dynlink_info = true;
Instruction insn = inferior.Architecture.ReadInstruction(inferior, dynlink_breakpoint_addr);
if ((insn == null) || !insn.CanInterpretInstruction)
{
throw new InternalError("Unknown dynlink breakpoint: {0}", dynlink_breakpoint_addr);
}
dynlink_breakpoint = new DynlinkBreakpoint(this, insn);
dynlink_breakpoint.Insert(inferior);
do_update_shlib_info(inferior);
check_loaded_library(inferior, main_bfd);
}
void read_dynamic_info(Inferior inferior)
{
if (has_dynlink_info)
{
if (!dyld_all_image_infos.IsNull)
{
do_update_shlib_info(inferior);
}
return;
}
TargetMemoryInfo info = Inferior.GetTargetMemoryInfo(AddressDomain.Global);
Bfd dyld_image = new Bfd(this, info, "/usr/lib/dyld", TargetAddress.Null, true);
dyld_all_image_infos = dyld_image.LookupSymbol("dyld_all_image_infos");
if (dyld_all_image_infos.IsNull)
{
return;
}
int size = 2 * inferior.TargetLongIntegerSize + 2 * inferior.TargetAddressSize;
TargetReader reader = new TargetReader(inferior.ReadMemory(dyld_all_image_infos, size));
reader.ReadLongInteger(); // version
reader.ReadLongInteger(); // infoArrayCount
reader.ReadAddress(); // infoArray
TargetAddress dyld_image_notifier = reader.ReadAddress();
has_dynlink_info = true;
Instruction insn = inferior.Architecture.ReadInstruction(inferior, dyld_image_notifier);
if ((insn == null) || !insn.CanInterpretInstruction)
{
throw new InternalError("Unknown dynlink breakpoint: {0}", dyld_image_notifier);
}
dynlink_breakpoint = new DynlinkBreakpoint(this, insn);
dynlink_breakpoint.Insert(inferior);
do_update_shlib_info(inferior);
check_loaded_library(inferior, main_bfd);
}
