/*
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* trace/beauty/prctl.c
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*
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* Copyright (C) 2017, Red Hat Inc, Arnaldo Carvalho de Melo <acme@redhat.com>
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*
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* Released under the GPL v2. (and only v2, not any later version)
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*/
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#include "trace/beauty/beauty.h"
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#include <linux/kernel.h>
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#include <uapi/linux/prctl.h>
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#include "trace/beauty/generated/prctl_option_array.c"
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static size_t prctl__scnprintf_option(int option, char *bf, size_t size)
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{
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static DEFINE_STRARRAY(prctl_options);
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return strarray__scnprintf(&strarray__prctl_options, bf, size, "%d", option);
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}
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static size_t prctl__scnprintf_set_mm(int option, char *bf, size_t size)
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{
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static DEFINE_STRARRAY(prctl_set_mm_options);
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return strarray__scnprintf(&strarray__prctl_set_mm_options, bf, size, "%d", option);
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}
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size_t syscall_arg__scnprintf_prctl_arg2(char *bf, size_t size, struct syscall_arg *arg)
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{
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int option = syscall_arg__val(arg, 0);
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if (option == PR_SET_MM)
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return prctl__scnprintf_set_mm(arg->val, bf, size);
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/*
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* We still don't grab the contents of pointers on entry or exit,
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* so just print them as hex numbers
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*/
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if (option == PR_SET_NAME)
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return syscall_arg__scnprintf_hex(bf, size, arg);
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return syscall_arg__scnprintf_long(bf, size, arg);
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}
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size_t syscall_arg__scnprintf_prctl_arg3(char *bf, size_t size, struct syscall_arg *arg)
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{
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int option = syscall_arg__val(arg, 0);
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if (option == PR_SET_MM)
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return syscall_arg__scnprintf_hex(bf, size, arg);
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return syscall_arg__scnprintf_long(bf, size, arg);
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}
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size_t syscall_arg__scnprintf_prctl_option(char *bf, size_t size, struct syscall_arg *arg)
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{
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unsigned long option = arg->val;
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enum {
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SPO_ARG2 = (1 << 1),
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SPO_ARG3 = (1 << 2),
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SPO_ARG4 = (1 << 3),
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SPO_ARG5 = (1 << 4),
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SPO_ARG6 = (1 << 5),
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};
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const u8 all_but2 = SPO_ARG3 | SPO_ARG4 | SPO_ARG5 | SPO_ARG6;
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const u8 all = SPO_ARG2 | all_but2;
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const u8 masks[] = {
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[PR_GET_DUMPABLE] = all,
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[PR_SET_DUMPABLE] = all_but2,
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[PR_SET_NAME] = all_but2,
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[PR_GET_CHILD_SUBREAPER] = all_but2,
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[PR_SET_CHILD_SUBREAPER] = all_but2,
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[PR_GET_SECUREBITS] = all,
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[PR_SET_SECUREBITS] = all_but2,
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[PR_SET_MM] = SPO_ARG4 | SPO_ARG5 | SPO_ARG6,
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[PR_GET_PDEATHSIG] = all,
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[PR_SET_PDEATHSIG] = all_but2,
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};
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if (option < ARRAY_SIZE(masks))
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arg->mask |= masks[option];
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return prctl__scnprintf_option(option, bf, size);
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}
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