2004-02-12  Christopher January  <chris@atomice.net>

	* coregrind/docs/coregrind_core.html: Add section 2.14. Rename
	existing section 2.14 to 2.15.
	* coregrind/vg_constants.h: Add VG_TRC_EBP_JMP_BREAKPOINT macro.
	* coregrind/vg_dispatch.S (dispatch_boring): Change dispatch_ctr
	condition to dispatch_ctr <= 0 (jle).
	(dispatch_exceptional): Increment dispatch_ctr on entry. Add check for
	VG_TRC_EBP_JMP_BREAKPOINT.
	(dispatch_breakpoint): New function.
	* coregrind/vg_from_ucode.c (load_ebp_from_JmpKind): Add case for
	JmpBreakpoint.
	(emit_code) Change dispatch_ctr condition to dispatch_ctr < 0 (CondNL).
	* coregrind/vg_include.h: Add definition for DebugState type. Add
	single_step and stopped members to ThreadState type. Define
	VG_DEBUG_STATE_SHM_KEY macro. Change VG_(threads) to a pointer. Add
	extern VG_(debug_state) declaration.
	Add prototypes for VG_(init_threads), VG_(cleanup_threads),
	VG_(pre_fork) and VG_(post_fork). Add single_step argument to
	VG_(disBB). Add VG_(invalidate_all_translations) prototype.
	* coregrind/vg_main.c (VG_(main)): Add calls to VG_(init_threads) and
	VG_(cleanup_threads).
	* coregrind/vg_mylibc.c (vg_do_syscall6): New function.
	(VG_(shmget)): Ditto.
	(VG_(shmat)): Ditto.
	(VG_(shmdt)): Ditto.
	(VG_(shmctl)): Ditto.
	* coregrind/vg_scheduler.c: Change VG_(threads) to a pointer. Add
	VG_(debug_state) declaration. Add vg_shmid declaration. Replace
	vg_tid_currently_in_baseBlockand vg_tid_last_in_baseBlock with
	macros.
	(VG_(pp_sched_status)): Check VG_(threads) pointer is not NULL.
	(name_of_sched_event)): Add case for VG_TRC_EBP_JMP_BREAKPOINT.
	(VG_(init_threads)): New function.
	(VG_(cleanup_threads)): Ditto.
	(VG_(pre_fork)): Ditto.
	(VG_(post_fork)): Ditto.
	(VG_scheduler)): When checking if a thread is runnable, also check
	it is not stopped. Remove '+1' in assignment to VG_(dispatch_ctr).
	Check if external debugger asked for all translations to invalidated.
	Check if threads is in single step mode. Handle exit from base block
	due to breakpoint and single step. Remove '-1' in assignment to
	done_this_time. Add case for VG_TRC_EBP_JMP_BREAKPOINT.
	* coregrind/vg_syscalls.c (VG_(perform_assumed_nonblocking_sys)): Add
	VG_(pre_fork) and VG_(post_fork) calls to __NR_fork case.
	* coregrind/vg_to_ucode.c (disInstr): Add case fo 0xCC (INT 3).
	(VG_(disBB)): Add single_step argument. Add check for single_step
	falg.
	* coregrind/vg_translate.c (pp_UInstrWorker): Add JmpBreakpoint case.
	(VG_(translate)): Add extra argument to VG_(disBB) call.
	* coregrind/vg_transtab.c (VG_(invalidate_all_translations)): New
	function.
	* include/vg_kerneliface.h: Define VKI_SIGTRAP, VKI_MAP_SHARED and
	VKI_MAP_FAILED macros. Copy from bits/ipc.h, bits/shm.h.
	* include/vg_skin.h: Add prototypes from sys/ipc.h. Define
	JmpBreakpoint.