Merge tag 'tags/bcm2835-defconfig-next-2020-03-27' into defconfig/next
[linux-2.6-microblaze.git] / tools / perf / trace / beauty / prctl.c
1 // SPDX-License-Identifier: LGPL-2.1
2 /*
3  * trace/beauty/prctl.c
4  *
5  *  Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
6  */
7
8 #include "trace/beauty/beauty.h"
9 #include <linux/kernel.h>
10 #include <uapi/linux/prctl.h>
11
12 #include "trace/beauty/generated/prctl_option_array.c"
13
14 DEFINE_STRARRAY(prctl_options, "PR_");
15
16 static size_t prctl__scnprintf_option(int option, char *bf, size_t size, bool show_prefix)
17 {
18         return strarray__scnprintf(&strarray__prctl_options, bf, size, "%d", show_prefix, option);
19 }
20
21 static size_t prctl__scnprintf_set_mm(int option, char *bf, size_t size, bool show_prefix)
22 {
23         static DEFINE_STRARRAY(prctl_set_mm_options, "PR_SET_MM_");
24         return strarray__scnprintf(&strarray__prctl_set_mm_options, bf, size, "%d", show_prefix, option);
25 }
26
27 size_t syscall_arg__scnprintf_prctl_arg2(char *bf, size_t size, struct syscall_arg *arg)
28 {
29         int option = syscall_arg__val(arg, 0);
30
31         if (option == PR_SET_MM)
32                 return prctl__scnprintf_set_mm(arg->val, bf, size, arg->show_string_prefix);
33         /*
34          * We still don't grab the contents of pointers on entry or exit,
35          * so just print them as hex numbers
36          */
37         if (option == PR_SET_NAME)
38                 return syscall_arg__scnprintf_hex(bf, size, arg);
39
40         return syscall_arg__scnprintf_long(bf, size, arg);
41 }
42
43 size_t syscall_arg__scnprintf_prctl_arg3(char *bf, size_t size, struct syscall_arg *arg)
44 {
45         int option = syscall_arg__val(arg, 0);
46
47         if (option == PR_SET_MM)
48                 return syscall_arg__scnprintf_hex(bf, size, arg);
49
50         return syscall_arg__scnprintf_long(bf, size, arg);
51 }
52
53 size_t syscall_arg__scnprintf_prctl_option(char *bf, size_t size, struct syscall_arg *arg)
54 {
55         unsigned long option = arg->val;
56         enum {
57                 SPO_ARG2 = (1 << 1),
58                 SPO_ARG3 = (1 << 2),
59                 SPO_ARG4 = (1 << 3),
60                 SPO_ARG5 = (1 << 4),
61                 SPO_ARG6 = (1 << 5),
62         };
63         const u8 all_but2 = SPO_ARG3 | SPO_ARG4 | SPO_ARG5 | SPO_ARG6;
64         const u8 all = SPO_ARG2 | all_but2;
65         const u8 masks[] = {
66                 [PR_GET_DUMPABLE]        = all,
67                 [PR_SET_DUMPABLE]        = all_but2,
68                 [PR_SET_NAME]            = all_but2,
69                 [PR_GET_CHILD_SUBREAPER] = all_but2,
70                 [PR_SET_CHILD_SUBREAPER] = all_but2,
71                 [PR_GET_SECUREBITS]      = all,
72                 [PR_SET_SECUREBITS]      = all_but2,
73                 [PR_SET_MM]              = SPO_ARG4 | SPO_ARG5 | SPO_ARG6,
74                 [PR_GET_PDEATHSIG]       = all,
75                 [PR_SET_PDEATHSIG]       = all_but2,
76         };
77
78         if (option < ARRAY_SIZE(masks))
79                 arg->mask |= masks[option];
80
81         return prctl__scnprintf_option(option, bf, size, arg->show_string_prefix);
82 }