1#@!#!123s

: / usr / share / systemtap / tapset / linux / powerpc /
Filename : sysc_sys32_swapcontext.stp
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# sys32_swapcontext ________________________________________
#
# long sys32_swapcontext(struct ucontext32 __user *old_ctx,
#			struct ucontext32 __user *new_ctx,
#			int ctx_size, int r6, int r7, int r8,
#			struct pt_regs *regs)
#

@define _SYSCALL_SYS32_SWAPCONTEXT_NAME
%(
	name = "sys32_swapcontext"
%)

@define _SYSCALL_SYS32_SWAPCONTEXT_ARGSTR
%(
	argstr = sprintf("%p, %p, %d, %d, %d, %d, %p",
	                 old_ctx_uaddr, new_ctx_uaddr, r5, r6, r7, r8, regs)
%)

probe syscall.sys32_swapcontext = dw_syscall.sys32_swapcontext !,
                                  nd_syscall.sys32_swapcontext ? {}
probe syscall.sys32_swapcontext.return = dw_syscall.sys32_swapcontext.return !,
                                         nd_syscall.sys32_swapcontext.return ? {}

# dw_sys32_swapcontext _____________________________________________________

probe dw_syscall.sys32_swapcontext = kernel.function("sys32_swapcontext") ?
{
	@_SYSCALL_SYS32_SWAPCONTEXT_NAME
	old_ctx_uaddr = $old_ctx
	new_ctx_uaddr = $new_ctx
	r5 = $ctx_size
	r6 = $r6
	r7 = $r7
	r8 = $r8
	regs = $regs
	@_SYSCALL_SYS32_SWAPCONTEXT_ARGSTR
}
probe dw_syscall.sys32_swapcontext.return = kernel.function("sys32_swapcontext").return ?
{
	@_SYSCALL_SYS32_SWAPCONTEXT_NAME
	@SYSC_RETVALSTR($return)
}

# nd_sys32_swapcontext _____________________________________________________

probe nd_syscall.sys32_swapcontext = kprobe.function("sys32_swapcontext") ?
{
	@_SYSCALL_SYS32_SWAPCONTEXT_NAME
	asmlinkage()
	old_ctx_uaddr = pointer_arg(1)
	new_ctx_uaddr = pointer_arg(2)
	r5 = int_arg(3)
	r6 = int_arg(4)
	r7 = int_arg(5)
	r8 = int_arg(6)
	regs = pointer_arg(7)
	@_SYSCALL_SYS32_SWAPCONTEXT_ARGSTR
}
probe nd_syscall.sys32_swapcontext.return = kprobe.function("sys32_swapcontext").return ?
{
	@_SYSCALL_SYS32_SWAPCONTEXT_NAME
	@SYSC_RETVALSTR(returnval())
}