cachepc-linux

Fork of AMDESE/linux with modifications for CachePC side-channel attack
git clone https://git.sinitax.com/sinitax/cachepc-linux
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rtla.c (1607B)

      1// SPDX-License-Identifier: GPL-2.0
      2/*
      3 * Copyright (C) 2021 Red Hat Inc, Daniel Bristot de Oliveira <bristot@kernel.org>
      4 */
      5
      6#include <getopt.h>
      7#include <stdlib.h>
      8#include <string.h>
      9#include <stdio.h>
     10
     11#include "osnoise.h"
     12#include "timerlat.h"
     13
     14/*
     15 * rtla_usage - print rtla usage
     16 */
     17static void rtla_usage(void)
     18{
     19	int i;
     20
     21	static const char *msg[] = {
     22		"",
     23		"rtla version " VERSION,
     24		"",
     25		"  usage: rtla COMMAND ...",
     26		"",
     27		"  commands:",
     28		"     osnoise  - gives information about the operating system noise (osnoise)",
     29		"     timerlat - measures the timer irq and thread latency",
     30		"",
     31		NULL,
     32	};
     33
     34	for (i = 0; msg[i]; i++)
     35		fprintf(stderr, "%s\n", msg[i]);
     36	exit(1);
     37}
     38
     39/*
     40 * run_command - try to run a rtla tool command
     41 *
     42 * It returns 0 if it fails. The tool's main will generally not
     43 * return as they should call exit().
     44 */
     45int run_command(int argc, char **argv, int start_position)
     46{
     47	if (strcmp(argv[start_position], "osnoise") == 0) {
     48		osnoise_main(argc-start_position, &argv[start_position]);
     49		goto ran;
     50	} else if (strcmp(argv[start_position], "timerlat") == 0) {
     51		timerlat_main(argc-start_position, &argv[start_position]);
     52		goto ran;
     53	}
     54
     55	return 0;
     56ran:
     57	return 1;
     58}
     59
     60int main(int argc, char *argv[])
     61{
     62	int retval;
     63
     64	/* is it an alias? */
     65	retval = run_command(argc, argv, 0);
     66	if (retval)
     67		exit(0);
     68
     69	if (argc < 2)
     70		goto usage;
     71
     72	if (strcmp(argv[1], "-h") == 0) {
     73		rtla_usage();
     74		exit(0);
     75	} else if (strcmp(argv[1], "--help") == 0) {
     76		rtla_usage();
     77		exit(0);
     78	}
     79
     80	retval = run_command(argc, argv, 1);
     81	if (retval)
     82		exit(0);
     83
     84usage:
     85	rtla_usage();
     86	exit(1);
     87}