FM / i386

/usr/share/systemtap/tapset/linux/i386

Name	Size	Mode	Actions
aux_syscalls.stp	3007	0644	edit dl rm
syscall_num.stp	37442	0644	edit dl rm
sysc_execve.stp	1986	0644	edit dl rm
sysc_get_thread_area.stp	2362	0644	edit dl rm
sysc_iopl.stp	2459	0644	edit dl rm
sysc_ipc.stp	1527	0644	edit dl rm
sysc_mmap2.stp	2474	0644	edit dl rm
sysc_set_thread_area.stp	2291	0644	edit dl rm
sysc_set_zone_reclaim.stp	1569	0644	edit dl rm
sysc_sigaltstack.stp	2691	0644	edit dl rm
sysc_vm86.stp	1075	0644	edit dl rm
sysc_vm86old.stp	1153	0644	edit dl rm

Edit: /usr/share/systemtap/tapset/linux/i386/sysc_set_thread_area.stp (2291B)

# set_thread_area ____________________________________________
/*
 * asmlinkage int
 * sys_set_thread_area(struct user_desc __user *u_info)
 */

@define _SYSCALL_SET_THREAD_AREA_NAME
%(
	name = "set_thread_area"
%)

@define _SYSCALL_SET_THREAD_AREA_ARGSTR
%(
	argstr = u_info_str
%)

@define _SYSCALL_SET_THREAD_AREA_REGARGS
%(
	u_info_uaddr = pointer_arg(1)
	u_info_str = _struct_user_desc_u(u_info_uaddr)
%)

probe syscall.set_thread_area = dw_syscall.set_thread_area !, nd_syscall.set_thread_area {}
probe syscall.set_thread_area.return = dw_syscall.set_thread_area.return !, nd_syscall.set_thread_area.return {}

# dw_set_thread_area _____________________________________________________

probe dw_syscall.set_thread_area = kernel.function("sys_set_thread_area")
{
	@_SYSCALL_SET_THREAD_AREA_NAME
	u_info_uaddr = $u_info
	u_info_str = _struct_user_desc_u(u_info_uaddr)
	@_SYSCALL_SET_THREAD_AREA_ARGSTR
}
probe dw_syscall.set_thread_area.return = kernel.function("sys_set_thread_area").return
{
	@_SYSCALL_SET_THREAD_AREA_NAME
	@SYSC_RETVALSTR($return)
}

# nd_set_thread_area _____________________________________________________

probe nd_syscall.set_thread_area = nd1_syscall.set_thread_area!, tp_syscall.set_thread_area
  { }

probe nd1_syscall.set_thread_area = kprobe.function("sys_set_thread_area")
{
	@_SYSCALL_SET_THREAD_AREA_NAME
	asmlinkage()
	@_SYSCALL_SET_THREAD_AREA_REGARGS
	@_SYSCALL_SET_THREAD_AREA_ARGSTR
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.set_thread_area = kernel.trace("sys_enter")
{
	__set_syscall_pt_regs($regs)
	@__syscall_gate(@const("__NR_set_thread_area"))
	@_SYSCALL_SET_THREAD_AREA_NAME
	@_SYSCALL_SET_THREAD_AREA_REGARGS
	@_SYSCALL_SET_THREAD_AREA_ARGSTR
}

probe nd_syscall.set_thread_area.return = nd1_syscall.set_thread_area.return!, tp_syscall.set_thread_area.return
  { }

probe nd1_syscall.set_thread_area.return = kprobe.function("sys_set_thread_area").return
{
	@_SYSCALL_SET_THREAD_AREA_NAME
	@SYSC_RETVALSTR(returnval())
}

/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.set_thread_area.return = kernel.trace("sys_exit")
{
	__set_syscall_pt_regs($regs)
	@__syscall_gate(@const("__NR_set_thread_area"))
	@_SYSCALL_SET_THREAD_AREA_NAME
	@SYSC_RETVALSTR($ret)
}

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