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/*
* trace/beauty/prctl.c
*
* Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
*
* Released under the GPL v2. (and only v2, not any later version)
*/
#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)
{
static DEFINE_STRARRAY(prctl_options);
return strarray__scnprintf(&strarray__prctl_options, bf, size, "%d", option);
}
static size_t prctl__scnprintf_set_mm(int option, char *bf, size_t size)
{
static DEFINE_STRARRAY(prctl_set_mm_options);
return strarray__scnprintf(&strarray__prctl_set_mm_options, bf, size, "%d", 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);
/*
* 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);
}
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