1/*-
2 * SPDX-License-Identifier: BSD-2-Clause
3 *
4 * Copyright (c) 2022 Dmitry Chagin <dchagin@FreeBSD.org>
5 *
6 * Redistribution and use in source and binary forms, with or without
7 * modification, are permitted provided that the following conditions
8 * are met:
9 * 1. Redistributions of source code must retain the above copyright
10 *    notice, this list of conditions and the following disclaimer.
11 * 2. Redistributions in binary form must reproduce the above copyright
12 *    notice, this list of conditions and the following disclaimer in the
13 *    documentation and/or other materials provided with the distribution.
14 *
15 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
16 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
17 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
18 * ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
19 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
20 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
21 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
22 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
23 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
24 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
25 * SUCH DAMAGE.
26 */
27
28#include <sys/types.h>
29#include <sys/proc.h>
30#include <stdbool.h>
31#include <stdio.h>
32#include <sysdecode.h>
33
34#include "support.h"
35
36#ifdef __aarch64__
37#include <arm64/linux/linux.h>
38#elif __i386__
39#include <i386/linux/linux.h>
40#elif __amd64__
41#include <amd64/linux/linux.h>
42#else
43#error "Unsupported Linux arch"
44#endif
45
46#include <compat/linux/linux.h>
47#include <compat/linux/linux_file.h>
48#include <compat/linux/linux_fork.h>
49#include <compat/linux/linux_time.h>
50
51#define	X(a,b)	{ a, #b },
52#define	XEND	{ 0, NULL }
53
54#define	TABLE_START(n)	static struct name_table n[] = {
55#define	TABLE_ENTRY	X
56#define	TABLE_END	XEND };
57
58#include "tables_linux.h"
59
60#undef TABLE_START
61#undef TABLE_ENTRY
62#undef TABLE_END
63
64static const char *linux_signames[] = {
65	[LINUX_SIGHUP] = "SIGHUP",
66	[LINUX_SIGINT] = "SIGINT",
67	[LINUX_SIGQUIT] = "SIGQUIT",
68	[LINUX_SIGILL] = "SIGILL",
69	[LINUX_SIGTRAP] = "SIGTRAP",
70	[LINUX_SIGABRT] = "SIGABRT",
71	[LINUX_SIGBUS] = "SIGBUS",
72	[LINUX_SIGFPE] = "SIGFPE",
73	[LINUX_SIGKILL] = "SIGKILL",
74	[LINUX_SIGUSR1] = "SIGUSR1",
75	[LINUX_SIGSEGV] = "SIGSEGV",
76	[LINUX_SIGUSR2] = "SIGUSR2",
77	[LINUX_SIGPIPE] = "SIGPIPE",
78	[LINUX_SIGALRM] = "SIGALRM",
79	[LINUX_SIGTERM] = "SIGTERM",
80	[LINUX_SIGSTKFLT] = "SIGSTKFLT",
81	[LINUX_SIGCHLD] = "SIGCHLD",
82	[LINUX_SIGCONT] = "SIGCONT",
83	[LINUX_SIGSTOP] = "SIGSTOP",
84	[LINUX_SIGTSTP] = "SIGTSTP",
85	[LINUX_SIGTTIN] = "SIGTTIN",
86	[LINUX_SIGTTOU] = "SIGTTOU",
87	[LINUX_SIGURG] = "SIGURG",
88	[LINUX_SIGXCPU] = "SIGXCPU",
89	[LINUX_SIGXFSZ] = "SIGXFSZ",
90	[LINUX_SIGVTALRM] = "SIGVTALRM",
91	[LINUX_SIGPROF] = "SIGPROF",
92	[LINUX_SIGWINCH] = "SIGWINCH",
93	[LINUX_SIGIO] = "SIGIO",
94	[LINUX_SIGPWR] = "SIGPWR",
95	[LINUX_SIGSYS] = "SIGSYS",
96
97	[LINUX_SIGRTMIN] = "SIGCANCEL",
98	[LINUX_SIGRTMIN + 1] = "SIGSETXID",
99	[LINUX_SIGRTMIN + 2] = "SIGRT2",
100	[LINUX_SIGRTMIN + 3] = "SIGRT3",
101	[LINUX_SIGRTMIN + 4] = "SIGRT4",
102	[LINUX_SIGRTMIN + 5] = "SIGRT5",
103	[LINUX_SIGRTMIN + 6] = "SIGRT6",
104	[LINUX_SIGRTMIN + 7] = "SIGRT7",
105	[LINUX_SIGRTMIN + 8] = "SIGRT8",
106	[LINUX_SIGRTMIN + 9] = "SIGRT9",
107	[LINUX_SIGRTMIN + 10] = "SIGRT10",
108	[LINUX_SIGRTMIN + 11] = "SIGRT11",
109	[LINUX_SIGRTMIN + 12] = "SIGRT12",
110	[LINUX_SIGRTMIN + 13] = "SIGRT13",
111	[LINUX_SIGRTMIN + 14] = "SIGRT14",
112	[LINUX_SIGRTMIN + 15] = "SIGRT15",
113	[LINUX_SIGRTMIN + 16] = "SIGRT16",
114	[LINUX_SIGRTMIN + 17] = "SIGRT17",
115	[LINUX_SIGRTMIN + 18] = "SIGRT18",
116	[LINUX_SIGRTMIN + 19] = "SIGRT19",
117	[LINUX_SIGRTMIN + 20] = "SIGRT20",
118	[LINUX_SIGRTMIN + 21] = "SIGRT21",
119	[LINUX_SIGRTMIN + 22] = "SIGRT22",
120	[LINUX_SIGRTMIN + 23] = "SIGRT23",
121	[LINUX_SIGRTMIN + 24] = "SIGRT24",
122	[LINUX_SIGRTMIN + 25] = "SIGRT25",
123	[LINUX_SIGRTMIN + 26] = "SIGRT26",
124	[LINUX_SIGRTMIN + 27] = "SIGRT27",
125	[LINUX_SIGRTMIN + 28] = "SIGRT28",
126	[LINUX_SIGRTMIN + 29] = "SIGRT29",
127	[LINUX_SIGRTMIN + 30] = "SIGRT30",
128	[LINUX_SIGRTMIN + 31] = "SIGRT31",
129	[LINUX_SIGRTMIN + 32] = "SIGRTMAX",
130};
131_Static_assert(nitems(linux_signames) == LINUX_SIGRTMAX + 1,
132    "invalid entries count in linux_signames");
133
134void
135sysdecode_linux_clockid(FILE *fp, clockid_t which)
136{
137	const char *str;
138	clockid_t ci;
139	pid_t pid;
140
141	if (which >= 0) {
142		str = lookup_value(clockids, which);
143		if (str == NULL)
144			fprintf(fp, "UNKNOWN(%d)", which);
145		else
146			fputs(str, fp);
147		return;
148	}
149	if ((which & LINUX_CLOCKFD_MASK) == LINUX_CLOCKFD_MASK) {
150		fputs("INVALID PERTHREAD|CLOCKFD", fp);
151		goto pidp;
152	}
153	ci = LINUX_CPUCLOCK_WHICH(which);
154	if (LINUX_CPUCLOCK_PERTHREAD(which) == true)
155		fputs("THREAD|", fp);
156	else
157		fputs("PROCESS|", fp);
158	str = lookup_value(clockcpuids, ci);
159	if (str != NULL)
160		fputs(str, fp);
161	else {
162		if (ci == LINUX_CLOCKFD)
163			fputs("CLOCKFD", fp);
164		else
165			fprintf(fp, "UNKNOWN(%d)", which);
166	}
167
168pidp:
169	pid = LINUX_CPUCLOCK_ID(which);
170	fprintf(fp, "(%d)", pid);
171}
172
173const char *
174sysdecode_linux_signal(int sig)
175{
176
177	if ((unsigned)sig < nitems(linux_signames))
178		return (linux_signames[sig]);
179	return (NULL);
180}
181
182const char *
183sysdecode_linux_sigprocmask_how(int how)
184{
185
186	return (lookup_value(sigprocmaskhow, how));
187}
188
189bool
190sysdecode_linux_clock_flags(FILE *fp, int flags, int *rem)
191{
192
193	return (print_mask_int(fp, clockflags, flags, rem));
194}
195
196bool
197sysdecode_linux_atflags(FILE *fp, int flag, int *rem)
198{
199
200	return (print_mask_int(fp, atflags, flag, rem));
201}
202
203bool
204sysdecode_linux_open_flags(FILE *fp, int flags, int *rem)
205{
206	bool printed;
207	int mode;
208	uintmax_t val;
209
210	mode = flags & LINUX_O_ACCMODE;
211	flags &= ~LINUX_O_ACCMODE;
212	switch (mode) {
213	case LINUX_O_RDONLY:
214		fputs("O_RDONLY", fp);
215		printed = true;
216		mode = 0;
217		break;
218	case LINUX_O_WRONLY:
219		fputs("O_WRONLY", fp);
220		printed = true;
221		mode = 0;
222		break;
223	case LINUX_O_RDWR:
224		fputs("O_RDWR", fp);
225		printed = true;
226		mode = 0;
227		break;
228	default:
229		printed = false;
230	}
231	val = (unsigned)flags;
232	print_mask_part(fp, openflags, &val, &printed);
233	if (rem != NULL)
234		*rem = val | mode;
235	return (printed);
236}
237
238bool
239sysdecode_linux_clone_flags(FILE *fp, int flags, int *rem)
240{
241	uintmax_t val;
242	bool printed;
243	int sig;
244
245	sig = flags & LINUX_CSIGNAL;
246	if (sig != 0)
247		fprintf(fp, "(%s)", sysdecode_linux_signal(sig));
248	val = (unsigned)flags & ~LINUX_CSIGNAL;
249	print_mask_part(fp, cloneflags, &val, &printed);
250	if (rem != NULL)
251		*rem = val;
252	return (printed);
253}
254