1*4882a593Smuzhiyun // SPDX-License-Identifier: LGPL-2.1
2*4882a593Smuzhiyun /*
3*4882a593Smuzhiyun * trace/beauty/prctl.c
4*4882a593Smuzhiyun *
5*4882a593Smuzhiyun * Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
6*4882a593Smuzhiyun */
7*4882a593Smuzhiyun
8*4882a593Smuzhiyun #include "trace/beauty/beauty.h"
9*4882a593Smuzhiyun #include <linux/kernel.h>
10*4882a593Smuzhiyun #include <uapi/linux/prctl.h>
11*4882a593Smuzhiyun
12*4882a593Smuzhiyun #include "trace/beauty/generated/prctl_option_array.c"
13*4882a593Smuzhiyun
14*4882a593Smuzhiyun DEFINE_STRARRAY(prctl_options, "PR_");
15*4882a593Smuzhiyun
prctl__scnprintf_option(int option,char * bf,size_t size,bool show_prefix)16*4882a593Smuzhiyun static size_t prctl__scnprintf_option(int option, char *bf, size_t size, bool show_prefix)
17*4882a593Smuzhiyun {
18*4882a593Smuzhiyun return strarray__scnprintf(&strarray__prctl_options, bf, size, "%d", show_prefix, option);
19*4882a593Smuzhiyun }
20*4882a593Smuzhiyun
prctl__scnprintf_set_mm(int option,char * bf,size_t size,bool show_prefix)21*4882a593Smuzhiyun static size_t prctl__scnprintf_set_mm(int option, char *bf, size_t size, bool show_prefix)
22*4882a593Smuzhiyun {
23*4882a593Smuzhiyun static DEFINE_STRARRAY(prctl_set_mm_options, "PR_SET_MM_");
24*4882a593Smuzhiyun return strarray__scnprintf(&strarray__prctl_set_mm_options, bf, size, "%d", show_prefix, option);
25*4882a593Smuzhiyun }
26*4882a593Smuzhiyun
syscall_arg__scnprintf_prctl_arg2(char * bf,size_t size,struct syscall_arg * arg)27*4882a593Smuzhiyun size_t syscall_arg__scnprintf_prctl_arg2(char *bf, size_t size, struct syscall_arg *arg)
28*4882a593Smuzhiyun {
29*4882a593Smuzhiyun int option = syscall_arg__val(arg, 0);
30*4882a593Smuzhiyun
31*4882a593Smuzhiyun if (option == PR_SET_MM)
32*4882a593Smuzhiyun return prctl__scnprintf_set_mm(arg->val, bf, size, arg->show_string_prefix);
33*4882a593Smuzhiyun /*
34*4882a593Smuzhiyun * We still don't grab the contents of pointers on entry or exit,
35*4882a593Smuzhiyun * so just print them as hex numbers
36*4882a593Smuzhiyun */
37*4882a593Smuzhiyun if (option == PR_SET_NAME)
38*4882a593Smuzhiyun return syscall_arg__scnprintf_hex(bf, size, arg);
39*4882a593Smuzhiyun
40*4882a593Smuzhiyun return syscall_arg__scnprintf_long(bf, size, arg);
41*4882a593Smuzhiyun }
42*4882a593Smuzhiyun
syscall_arg__scnprintf_prctl_arg3(char * bf,size_t size,struct syscall_arg * arg)43*4882a593Smuzhiyun size_t syscall_arg__scnprintf_prctl_arg3(char *bf, size_t size, struct syscall_arg *arg)
44*4882a593Smuzhiyun {
45*4882a593Smuzhiyun int option = syscall_arg__val(arg, 0);
46*4882a593Smuzhiyun
47*4882a593Smuzhiyun if (option == PR_SET_MM)
48*4882a593Smuzhiyun return syscall_arg__scnprintf_hex(bf, size, arg);
49*4882a593Smuzhiyun
50*4882a593Smuzhiyun return syscall_arg__scnprintf_long(bf, size, arg);
51*4882a593Smuzhiyun }
52*4882a593Smuzhiyun
syscall_arg__scnprintf_prctl_option(char * bf,size_t size,struct syscall_arg * arg)53*4882a593Smuzhiyun size_t syscall_arg__scnprintf_prctl_option(char *bf, size_t size, struct syscall_arg *arg)
54*4882a593Smuzhiyun {
55*4882a593Smuzhiyun unsigned long option = arg->val;
56*4882a593Smuzhiyun enum {
57*4882a593Smuzhiyun SPO_ARG2 = (1 << 1),
58*4882a593Smuzhiyun SPO_ARG3 = (1 << 2),
59*4882a593Smuzhiyun SPO_ARG4 = (1 << 3),
60*4882a593Smuzhiyun SPO_ARG5 = (1 << 4),
61*4882a593Smuzhiyun SPO_ARG6 = (1 << 5),
62*4882a593Smuzhiyun };
63*4882a593Smuzhiyun const u8 all_but2 = SPO_ARG3 | SPO_ARG4 | SPO_ARG5 | SPO_ARG6;
64*4882a593Smuzhiyun const u8 all = SPO_ARG2 | all_but2;
65*4882a593Smuzhiyun const u8 masks[] = {
66*4882a593Smuzhiyun [PR_GET_DUMPABLE] = all,
67*4882a593Smuzhiyun [PR_SET_DUMPABLE] = all_but2,
68*4882a593Smuzhiyun [PR_SET_NAME] = all_but2,
69*4882a593Smuzhiyun [PR_GET_CHILD_SUBREAPER] = all_but2,
70*4882a593Smuzhiyun [PR_SET_CHILD_SUBREAPER] = all_but2,
71*4882a593Smuzhiyun [PR_GET_SECUREBITS] = all,
72*4882a593Smuzhiyun [PR_SET_SECUREBITS] = all_but2,
73*4882a593Smuzhiyun [PR_SET_MM] = SPO_ARG4 | SPO_ARG5 | SPO_ARG6,
74*4882a593Smuzhiyun [PR_GET_PDEATHSIG] = all,
75*4882a593Smuzhiyun [PR_SET_PDEATHSIG] = all_but2,
76*4882a593Smuzhiyun };
77*4882a593Smuzhiyun
78*4882a593Smuzhiyun if (option < ARRAY_SIZE(masks))
79*4882a593Smuzhiyun arg->mask |= masks[option];
80*4882a593Smuzhiyun
81*4882a593Smuzhiyun return prctl__scnprintf_option(option, bf, size, arg->show_string_prefix);
82*4882a593Smuzhiyun }
83