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Mini Shell
Mini Shell
# In kernels < 2.6.33, mmap()/mmap2() was handled by arch-specific
# code. In kernels >= 2.6.33, the arch-specific code just calls
# generic sys_mmap_pgoff().
%( kernel_v < "2.6.33" %?
# mmap
# long sys_mmap(unsigned long addr, size_t len,
# unsigned long prot, unsigned long flags,
# unsigned long fd, off_t offset)
#
@define _SYSCALL_MMAP_NAME
%(
name = "mmap"
%)
@define _SYSCALL_MMAP_ARGSTR
%(
argstr = sprintf("%p, %u, %s, %s, %d, %d", start, len,
prot_str, flags_str, fd, offset)
%)
probe syscall.mmap = dw_syscall.mmap !, nd_syscall.mmap ? {}
probe syscall.mmap.return = dw_syscall.mmap.return !, nd_syscall.mmap.return ? {}
# dw_mmap _____________________________________________________
probe dw_syscall.mmap = kernel.function("sys_mmap") ?
{
@_SYSCALL_MMAP_NAME
start = $addr
len = $len
prot = $prot
prot_str = _mprotect_prot_str(prot)
flags = $flags
flags_str = _mmap_flags(flags)
# Although the kernel gets an unsigned long fd, on the
# user-side it is a signed int. Fix this.
fd = __int32($fd)
offset = $offset
@_SYSCALL_MMAP_ARGSTR
}
probe dw_syscall.mmap.return = kernel.function("sys_mmap").return ?
{
@_SYSCALL_MMAP_NAME
@SYSC_RETVALSTR2($return)
}
# nd_mmap _____________________________________________________
probe nd_syscall.mmap = kprobe.function("sys_mmap") ?
{
@_SYSCALL_MMAP_NAME
asmlinkage()
start = ulong_arg(1)
len = ulong_arg(2)
prot = ulong_arg(3)
prot_str = _mprotect_prot_str(prot)
flags = ulong_arg(4)
flags_str = _mmap_flags(flags)
# Although the kernel gets an unsigned long fd, on the
# user-side it is a signed int. Fix this.
fd = int_arg(5)
offset = ulong_arg(6)
@_SYSCALL_MMAP_ARGSTR
}
probe nd_syscall.mmap.return = kprobe.function("sys_mmap").return ?
{
@_SYSCALL_MMAP_NAME
@SYSC_RETVALSTR2(returnval())
}
%)
Zerion Mini Shell 1.0