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# getgroups __________________________________________________
# long sys_getgroups(int gidsetsize, gid_t __user *grouplist)
# long sys_getgroups16(int gidsetsize, old_gid_t __user *grouplist)
# long sys32_getgroups16(int gidsetsize, u16 __user *grouplist)
#
@define _SYSCALL_GETGROUPS_NAME
%(
name = "getgroups"
%)
@define _SYSCALL_GETGROUPS_ARGSTR
%(
argstr = sprintf("%d, %p", size, list_uaddr)
%)
@define _SYSCALL_GETGROUPS_REGARGS
%(
size = int_arg(1)
list_uaddr = pointer_arg(2)
%)
@define _SYSCALL_GETGROUPS_REGARGS_STORE
%(
if (@probewrite(size))
set_int_arg(1, size)
if (@probewrite(list_uaddr))
set_pointer_arg(2, list_uaddr)
%)
probe syscall.getgroups = dw_syscall.getgroups !, nd_syscall.getgroups ? {}
probe syscall.getgroups.return = dw_syscall.getgroups.return !, nd_syscall.getgroups.return ? {}
# dw_getgroups _____________________________________________________
probe dw_syscall.getgroups = kernel.function("sys_getgroups16").call ?,
kernel.function("sys32_getgroups16").call ?,
%( arch == "s390" %?
kernel.function("compat_sys_s390_getgroups16").call ?,
%)
kernel.function("sys_getgroups").call ?
{
@_SYSCALL_GETGROUPS_NAME
size = __int32($gidsetsize)
list_uaddr = $grouplist
@_SYSCALL_GETGROUPS_ARGSTR
}
probe dw_syscall.getgroups.return =
kernel.function("sys_getgroups16").return ?,
kernel.function("sys32_getgroups16").return ?,
%( arch == "s390" %?
kernel.function("compat_sys_s390_getgroups16").return ?,
%)
kernel.function("sys_getgroups").return ?
{
@_SYSCALL_GETGROUPS_NAME
@SYSC_RETVALSTR($return)
}
# nd_getgroups _____________________________________________________
probe nd_syscall.getgroups = nd1_syscall.getgroups!, nd2_syscall.getgroups!, tp_syscall.getgroups
{ }
probe nd1_syscall.getgroups = kprobe.function("sys_getgroups16") ?,
kprobe.function("sys32_getgroups16") ?,
%( arch == "s390" %?
kprobe.function("compat_sys_s390_getgroups16") ?,
%)
kprobe.function("sys_getgroups") ?
{
@_SYSCALL_GETGROUPS_NAME
asmlinkage()
@_SYSCALL_GETGROUPS_REGARGS
@_SYSCALL_GETGROUPS_ARGSTR
}
/* kernel 4.17+ */
probe nd2_syscall.getgroups = kprobe.function(@arch_syscall_prefix "sys_getgroups16") ?,
kprobe.function(@arch_syscall_prefix "sys_getgroups") ?
{
__set_syscall_pt_regs(pointer_arg(1))
@_SYSCALL_GETGROUPS_NAME
@_SYSCALL_GETGROUPS_REGARGS
@_SYSCALL_GETGROUPS_ARGSTR
},
{
@_SYSCALL_GETGROUPS_REGARGS_STORE
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.getgroups = __tp_syscall.getgroups, __tp_syscall.getgroups32
{
__set_syscall_pt_regs($regs)
@_SYSCALL_GETGROUPS_NAME
@_SYSCALL_GETGROUPS_REGARGS
@_SYSCALL_GETGROUPS_ARGSTR
},
{
@_SYSCALL_GETGROUPS_REGARGS_STORE
}
probe __tp_syscall.getgroups = kernel.trace("sys_enter")
{
@__syscall_compat_gate(@const("__NR_getgroups"), @const("__NR_compat_getgroups"))
}
probe __tp_syscall.getgroups32 = kernel.trace("sys_enter")
{
@__syscall_compat_gate(@const("__NR_getgroups32"), @const("__NR_compat_getgroups32"))
}
probe nd_syscall.getgroups.return = nd1_syscall.getgroups.return!, nd2_syscall.getgroups.return!, tp_syscall.getgroups.return
{ }
probe nd1_syscall.getgroups.return =
kprobe.function("sys_getgroups16").return ?,
kprobe.function("sys32_getgroups16").return ?,
%( arch == "s390" %?
kprobe.function("compat_sys_s390_getgroups16").return ?,
%)
kprobe.function("sys_getgroups").return ?
{
@_SYSCALL_GETGROUPS_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 4.17+ */
probe nd2_syscall.getgroups.return = kprobe.function(@arch_syscall_prefix "sys_getgroups16").return ?,
kprobe.function(@arch_syscall_prefix "sys_getgroups").return ?
{
@_SYSCALL_GETGROUPS_NAME
@SYSC_RETVALSTR(returnval())
}
/* kernel 3.5+, but undesirable because it affects all syscalls */
probe tp_syscall.getgroups.return = __tp_syscall.getgroups.return, __tp_syscall.getgroups32.return
{
__set_syscall_pt_regs($regs)
@_SYSCALL_GETGROUPS_NAME
@SYSC_RETVALSTR($ret)
}
probe __tp_syscall.getgroups.return = kernel.trace("sys_exit")
{
@__syscall_compat_gate(@const("__NR_getgroups"), @const("__NR_compat_getgroups"))
}
probe __tp_syscall.getgroups32.return = kernel.trace("sys_exit")
{
@__syscall_compat_gate(@const("__NR_getgroups32"), @const("__NR_compat_getgroups32"))
}
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