[PATCH 1/4] Support the new BookE ptrace interface

[Thiago Jung Bauermann]

This patch adapts ppc-linux-nat.c to the new interface, without changing
anything else. As a bonus, with the new interface it supports hardware 
breakpoints.
-- 
[]'s
Thiago Jung Bauermann
IBM Linux Technology Center


2009-12-23  Sergio Durigan Junior  <sergiodj@linux.vnet.ibm.com>
	    Thiago Jung Bauermann  <bauerman@br.ibm.com>

	* ppc-linux-nat.c (PTRACE_GET_DEBUGREG): Update comment.
	(PPC_PTRACE_GETWDBGINFO, PPC_PTRACE_SETHWDEBUG, PPC_PTRACE_DELHWDEBUG,
	ppc_debug_info, PPC_DEBUG_FEATURE_INSN_BP_RANGE,
	PPC_DEBUG_FEATURE_INSN_BP_MASK, PPC_DEBUG_FEATURE_DATA_BP_RANGE,
	PPC_DEBUG_FEATURE_DATA_BP_MASK, ppc_hw_breakpoint,
	PPC_BREAKPOINT_TRIGGER_EXECUTE, PPC_BREAKPOINT_TRIGGER READ,
	PPC_BREAKPOINT_TRIGGER_WRITE, PPC_BREAKPOINT_TRIGGER_RW,
	PPC_BREAKPOINT_MODE_EXACT PPC_BREAKPOINT_MODE_RANGE_INCLUSIVE,
	PPC_BREAKPOINT_MODE_RANGE_EXCLUSIVE, PPC_BREAKPOINT_MODE_MASK,
	PPC_BREAKPOINT_CONDITION_NONE, PPC_BREAKPOINT_CONDITION_AND,
	PPC_BREAKPOINT_CONDITION_EXACT, PPC_BREAKPOINT_CONDITION_OR,
	PPC_BREAKPOINT_CONDITION_AND_OR, PPC_BREAKPOINT_CONDITION_BE_ALL,
	PPC_BREAKPOINT_CONDITION_BE_SHIFT, PPC_BREAKPOINT_CONDITION_BE):
	Define, in case <ptrace.h> doesn't provide it.
	(have_ptrace_new_debug_booke): New flag.
	(ppc_linux_check_watch_resources): Renamed to ...
	(ppc_linux_can_use_hw_breakpoint): ... this.  Handle BookE processors.
	(booke_debug_info): New variable.
	(max_slots_number): Ditto.
	(struct hw_break_tuple): New struct.
	(struct thread_points): Ditto.
	(ppc_threads): New variable.
	(PPC_DEBUG_CURRENT_VERSION): New define.
	(ppc_linux_region_ok_for_hw_watchpoint): Handle BookE processors.
	(booke_cmp_hw_point): New function.
	(booke_find_thread_points_by_tid): Ditto.
	(booke_insert_point): Ditto.
	(booke_remove_point): Ditto.
	(ppc_linux_insert_hw_breakpoint): Ditto.
	(ppc_linux_remove_hw_breakpoint): Ditto.
	(HW_WATCH_RW_TRIGGER): New define.
	(ppc_linux_insert_watchpoint): Handle BookE processors.
	(ppc_linux_remove_watchpoint): Ditto.
	(ppc_linux_new_thread): Ditto.
	(ppc_linux_stopped_data_address): Ditto.
	(ppc_linux_watchpoint_addr_within_range): Ditto.
	with and without the new kernel interface.
	(ppc_linux_read_description): Query the target to know if it
	supports the new kernel BookE interface.
	(_initialize_ppc_linux_nat): Initialize to_insert_hw_breakpoint and
	to_remove_hw_breakpoint fields of the target operations struct.

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