| // SPDX-License-Identifier: LGPL-2.1 |
| /* |
| * trace/beauty/prctl.c |
| * |
| * Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com> |
| */ |
| |
| #include "trace/beauty/beauty.h" |
| #include <linux/kernel.h> |
| #include <uapi/linux/prctl.h> |
| |
| #include "trace/beauty/generated/prctl_option_array.c" |
| |
| static size_t prctl__scnprintf_option(int option, char *bf, size_t size, bool show_prefix) |
| { |
| static DEFINE_STRARRAY(prctl_options, "PR_"); |
| return strarray__scnprintf(&strarray__prctl_options, bf, size, "%d", show_prefix, option); |
| } |
| |
| static size_t prctl__scnprintf_set_mm(int option, char *bf, size_t size, bool show_prefix) |
| { |
| static DEFINE_STRARRAY(prctl_set_mm_options, "PR_SET_MM_"); |
| return strarray__scnprintf(&strarray__prctl_set_mm_options, bf, size, "%d", show_prefix, option); |
| } |
| |
| size_t syscall_arg__scnprintf_prctl_arg2(char *bf, size_t size, struct syscall_arg *arg) |
| { |
| int option = syscall_arg__val(arg, 0); |
| |
| if (option == PR_SET_MM) |
| return prctl__scnprintf_set_mm(arg->val, bf, size, arg->show_string_prefix); |
| /* |
| * We still don't grab the contents of pointers on entry or exit, |
| * so just print them as hex numbers |
| */ |
| if (option == PR_SET_NAME) |
| return syscall_arg__scnprintf_hex(bf, size, arg); |
| |
| return syscall_arg__scnprintf_long(bf, size, arg); |
| } |
| |
| size_t syscall_arg__scnprintf_prctl_arg3(char *bf, size_t size, struct syscall_arg *arg) |
| { |
| int option = syscall_arg__val(arg, 0); |
| |
| if (option == PR_SET_MM) |
| return syscall_arg__scnprintf_hex(bf, size, arg); |
| |
| return syscall_arg__scnprintf_long(bf, size, arg); |
| } |
| |
| size_t syscall_arg__scnprintf_prctl_option(char *bf, size_t size, struct syscall_arg *arg) |
| { |
| unsigned long option = arg->val; |
| enum { |
| SPO_ARG2 = (1 << 1), |
| SPO_ARG3 = (1 << 2), |
| SPO_ARG4 = (1 << 3), |
| SPO_ARG5 = (1 << 4), |
| SPO_ARG6 = (1 << 5), |
| }; |
| const u8 all_but2 = SPO_ARG3 | SPO_ARG4 | SPO_ARG5 | SPO_ARG6; |
| const u8 all = SPO_ARG2 | all_but2; |
| const u8 masks[] = { |
| [PR_GET_DUMPABLE] = all, |
| [PR_SET_DUMPABLE] = all_but2, |
| [PR_SET_NAME] = all_but2, |
| [PR_GET_CHILD_SUBREAPER] = all_but2, |
| [PR_SET_CHILD_SUBREAPER] = all_but2, |
| [PR_GET_SECUREBITS] = all, |
| [PR_SET_SECUREBITS] = all_but2, |
| [PR_SET_MM] = SPO_ARG4 | SPO_ARG5 | SPO_ARG6, |
| [PR_GET_PDEATHSIG] = all, |
| [PR_SET_PDEATHSIG] = all_but2, |
| }; |
| |
| if (option < ARRAY_SIZE(masks)) |
| arg->mask |= masks[option]; |
| |
| return prctl__scnprintf_option(option, bf, size, arg->show_string_prefix); |
| } |