83 lines
2.4 KiB
C
83 lines
2.4 KiB
C
// 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"
|
|
|
|
DEFINE_STRARRAY(prctl_options, "PR_");
|
|
|
|
static size_t prctl__scnprintf_option(int option, char *bf, size_t size, bool show_prefix)
|
|
{
|
|
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);
|
|
}
|