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/*
* Check decoding of kexec_file_load syscall.
*
* Copyright (c) 2016 Eugene Syromyatnikov <evgsyr@gmail.com>
* Copyright (c) 2016-2024 The strace developers.
* All rights reserved.
*
* SPDX-License-Identifier: GPL-2.0-or-later
*/
#include "tests.h"
#include "scno.h"
#ifdef __NR_kexec_file_load
# include <inttypes.h>
# include <stdio.h>
# include <unistd.h>
struct strval {
kernel_ulong_t val;
const char *str64;
const char *str32;
const char *str;
};
# define CMDLINE_STR "deadcodebaddatadefaced"
int
main(void)
{
static const kernel_ulong_t bogus_kernel_fd =
(kernel_ulong_t) 0xdeadca57badda7a1ULL;
static const kernel_ulong_t bogus_initrd_fd =
(kernel_ulong_t) 0xdec0ded1defaced2ULL;
static const char cmdline_str[] = CMDLINE_STR;
static const char cmdline_short_str[] = "abcdef";
static const kernel_ulong_t cmdline_lens[] = {
0,
(kernel_ulong_t) 0xcaffeeeddeadbeefULL,
sizeof(cmdline_str),
sizeof(cmdline_str) - 1,
sizeof(cmdline_short_str),
sizeof(cmdline_short_str) - 1,
sizeof(cmdline_short_str) + 1,
};
static const struct strval flags[] = {
{ (kernel_ulong_t) 0xbadc0dedda7a1050ULL,
"0xbadc0ded", "0x",
"da7a1050 /* KEXEC_FILE_??? */" },
{ 0, "", "", "0" },
{ 0xdeadbeef, "", "",
"KEXEC_FILE_UNLOAD|KEXEC_FILE_ON_CRASH|"
"KEXEC_FILE_NO_INITRAMFS|KEXEC_FILE_DEBUG|0xdeadbee0" },
};
long rc;
char *cmdline = tail_memdup(cmdline_str, sizeof(cmdline_str));
char *cmdline_short =
tail_memdup(cmdline_short_str, sizeof(cmdline_short_str));
char cmdline_ptr[sizeof("0x") + sizeof(void *) * 2];
char cmdline_short_ptr[sizeof("0x") + sizeof(void *) * 2];
struct strval cmdlines[] = {
{ (uintptr_t) NULL, "", "", "NULL" },
{ (uintptr_t) (cmdline + sizeof(cmdline_str)), "", "",
cmdline_ptr },
{ (uintptr_t) cmdline, "", "", "\"deadcodeb\"..." },
{ (uintptr_t) cmdline, "", "", "\"deadcodeb\"..." },
{ (uintptr_t) cmdline_short, "", "", "\"abcdef\\0\"" },
{ (uintptr_t) cmdline_short, "", "", "\"abcdef\"" },
{ (uintptr_t) cmdline_short, "", "", cmdline_short_ptr },
};
snprintf(cmdline_ptr, sizeof(cmdline_ptr), "%p",
cmdline + sizeof(cmdline_str));
snprintf(cmdline_short_ptr, sizeof(cmdline_short_ptr), "%p",
cmdline_short);
for (unsigned int i = 0; i < ARRAY_SIZE(flags); ++i) {
for (unsigned int j = 0; j < ARRAY_SIZE(cmdlines); ++j) {
rc = syscall(__NR_kexec_file_load, bogus_kernel_fd,
bogus_initrd_fd, cmdline_lens[j],
cmdlines[j].val, flags[i].val);
printf("kexec_file_load(%d, %d, %llu, %s, %s%s) = %s\n",
(int) bogus_kernel_fd, (int) bogus_initrd_fd,
(unsigned long long) cmdline_lens[j],
cmdlines[j].str,
sizeof(kernel_ulong_t) == 8 ? flags[i].str64 :
flags[i].str32, flags[i].str, sprintrc(rc));
}
}
puts("+++ exited with 0 +++");
return 0;
}
#else
SKIP_MAIN_UNDEFINED("__NR_kexec_file_load");
#endif
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