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freebsd-dev/usr.bin/kdump/linux.c
Dmitry Chagin c2c9ac88c2 kdump: Add a facility to print numbers in decimal format always 
To help grepping kdump output by pid or tid it makes sence to print
some numbers in decimal format always. Eg, process or thread identifier
at least, as they already printed in decimal format.
Switch to print pid/tid arguments of some Linux signal related syscalls
in decimal format.

Reviewed by:		jhb
Differential Revision:	https://reviews.freebsd.org/D40099
MFC after:		1 week
2023-05-26 19:35:08 +03:00

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/*-
* SPDX-License-Identifier: BSD-2-Clause
*
* Copyright (c) 2022 Dmitry Chagin <dchagin@FreeBSD.org>
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
#include <sys/param.h>
#include <sys/uio.h>
#include <sys/ktrace.h>
#include <err.h>
#include <errno.h>
#include <stddef.h>
#include <stdlib.h>
#include <string.h>
#include <sysdecode.h>
#include "kdump.h"
#ifdef __amd64__
#include <amd64/linux/linux.h>
#include <amd64/linux32/linux32_syscall.h>
#elif __aarch64__
#include <arm64/linux/linux.h>
#elif __i386__
#include <i386/linux/linux.h>
#endif
#include <compat/linux/linux.h>
#include <compat/linux/linux_file.h>
static void
print_linux_signal(int signo)
{
const char *signame;
signame = sysdecode_linux_signal(signo);
if (signame != NULL)
printf("%s", signame);
else
printf("SIG %d", signo);
}
void
ktrsyscall_linux(struct ktr_syscall *ktr, register_t **resip,
int *resnarg, char *resc)
{
int narg = ktr->ktr_narg;
register_t *ip, *first;
int quad_align, quad_slots;
char c;
ip = first = &ktr->ktr_args[0];
c = *resc;
quad_align = 0;
quad_slots = 1;
switch (ktr->ktr_code) {
case LINUX_SYS_linux_faccessat:
case LINUX_SYS_linux_fchmodat:
case LINUX_SYS_linux_fchownat:
#ifdef LINUX_SYS_linux_newfstatat
case LINUX_SYS_linux_newfstatat:
#endif
#ifdef LINUX_SYS_linux_fstatat64
case LINUX_SYS_linux_fstatat64:
#endif
#ifdef LINUX_SYS_linux_futimesat
case LINUX_SYS_linux_futimesat:
#endif
case LINUX_SYS_linux_linkat:
case LINUX_SYS_linux_mkdirat:
case LINUX_SYS_linux_mknodat:
case LINUX_SYS_linux_openat:
case LINUX_SYS_linux_readlinkat:
case LINUX_SYS_linux_renameat:
case LINUX_SYS_linux_unlinkat:
case LINUX_SYS_linux_utimensat:
putchar('(');
print_integer_arg_valid(sysdecode_atfd, *ip);
c = ',';
ip++;
narg--;
break;
}
switch (ktr->ktr_code) {
#ifdef LINUX_SYS_linux_access
case LINUX_SYS_linux_access:
#endif
case LINUX_SYS_linux_faccessat:
print_number(ip, narg, c);
putchar(',');
print_mask_arg(sysdecode_access_mode, *ip);
ip++;
narg--;
break;
#ifdef LINUX_SYS_linux_chmod
case LINUX_SYS_linux_chmod:
#endif
case LINUX_SYS_linux_fchmodat:
print_number(ip, narg, c);
putchar(',');
decode_filemode(*ip);
ip++;
narg--;
break;
case LINUX_SYS_linux_mknodat:
print_number(ip, narg, c);
putchar(',');
decode_filemode(*ip);
ip++;
narg--;
break;
#ifdef LINUX_SYS_linux_mkdir
case LINUX_SYS_linux_mkdir:
#endif
case LINUX_SYS_linux_mkdirat:
print_number(ip, narg, c);
putchar(',');
decode_filemode(*ip);
ip++;
narg--;
break;
case LINUX_SYS_linux_linkat:
case LINUX_SYS_linux_renameat:
case LINUX_SYS_linux_symlinkat:
print_number(ip, narg, c);
putchar(',');
print_integer_arg_valid(sysdecode_atfd, *ip);
ip++;
narg--;
print_number(ip, narg, c);
break;
case LINUX_SYS_linux_fchownat:
print_number(ip, narg, c);
print_number(ip, narg, c);
print_number(ip, narg, c);
break;
#ifdef LINUX_SYS_linux_newfstatat
case LINUX_SYS_linux_newfstatat:
#endif
#ifdef LINUX_SYS_linux_fstatat64
case LINUX_SYS_linux_fstatat64:
#endif
case LINUX_SYS_linux_utimensat:
print_number(ip, narg, c);
print_number(ip, narg, c);
break;
case LINUX_SYS_linux_unlinkat:
print_number(ip, narg, c);
break;
case LINUX_SYS_linux_clock_gettime:
case LINUX_SYS_linux_clock_settime:
case LINUX_SYS_linux_clock_getres:
case LINUX_SYS_linux_timer_create:
putchar('(');
sysdecode_linux_clockid(stdout, *ip);
c = ',';
ip++;
narg--;
break;
case LINUX_SYS_linux_clock_nanosleep:
putchar('(');
sysdecode_linux_clockid(stdout, *ip);
putchar(',');
ip++;
narg--;
print_mask_arg0(sysdecode_linux_clock_flags, *ip);
c = ',';
ip++;
narg--;
break;
case LINUX_SYS_linux_clone:
putchar('(');
print_mask_arg(sysdecode_linux_clone_flags, *ip);
ip++;
narg--;
c = ',';
break;
case LINUX_SYS_linux_kill:
case LINUX_SYS_linux_tkill:
case LINUX_SYS_linux_rt_sigqueueinfo:
print_decimal_number(ip, narg, c);
putchar(',');
print_linux_signal(*ip);
ip++;
narg--;
break;
case LINUX_SYS_linux_tgkill:
case LINUX_SYS_linux_rt_tgsigqueueinfo:
print_decimal_number(ip, narg, c);
print_decimal_number(ip, narg, c);
putchar(',');
print_linux_signal(*ip);
ip++;
narg--;
break;
#ifdef LINUX_SYS_linux_open
case LINUX_SYS_linux_open:
#endif
case LINUX_SYS_linux_openat:
print_number(ip, narg, c);
putchar(',');
print_mask_arg(sysdecode_linux_open_flags, ip[0]);
if ((ip[0] & LINUX_O_CREAT) == LINUX_O_CREAT) {
putchar(',');
decode_filemode(ip[1]);
}
ip += 2;
narg -= 2;
break;
case LINUX_SYS_linux_rt_sigaction:
putchar('(');
print_linux_signal(*ip);
ip++;
narg--;
c = ',';
break;
case LINUX_SYS_linux_ftruncate:
case LINUX_SYS_linux_truncate:
print_number(ip, narg, c);
print_number64(first, ip, narg, c);
break;
case LINUX_SYS_linux_getitimer:
case LINUX_SYS_linux_setitimer:
putchar('(');
print_integer_arg(sysdecode_itimer, *ip);
ip++;
narg--;
c = ',';
break;
case LINUX_SYS_linux_rt_sigprocmask:
#ifdef LINUX_SYS_linux_sigprocmask
case LINUX_SYS_linux_sigprocmask:
#endif
putchar('(');
print_integer_arg(sysdecode_linux_sigprocmask_how, *ip);
ip++;
narg--;
c = ',';
break;
}
switch (ktr->ktr_code) {
case LINUX_SYS_linux_fchownat:
case LINUX_SYS_linux_faccessat:
case LINUX_SYS_linux_fchmodat:
#ifdef LINUX_SYS_linux_newfstatat
case LINUX_SYS_linux_newfstatat:
#endif
#ifdef LINUX_SYS_linux_fstatat64
case LINUX_SYS_linux_fstatat64:
#endif
case LINUX_SYS_linux_linkat:
case LINUX_SYS_linux_unlinkat:
case LINUX_SYS_linux_utimensat:
putchar(',');
print_mask_arg0(sysdecode_linux_atflags, *ip);
ip++;
narg--;
break;
}
*resc = c;
*resip = ip;
*resnarg = narg;
}
#if defined(__amd64__)
void
ktrsyscall_linux32(struct ktr_syscall *ktr, register_t **resip,
int *resnarg, char *resc)
{
int narg = ktr->ktr_narg;
register_t *ip, *first;
int quad_align, quad_slots;
char c;
ip = first = &ktr->ktr_args[0];
c = *resc;
quad_align = 0;
quad_slots = 2;
switch (ktr->ktr_code) {
case LINUX32_SYS_linux_faccessat:
case LINUX32_SYS_linux_fchmodat:
case LINUX32_SYS_linux_fchownat:
case LINUX32_SYS_linux_fstatat64:
case LINUX32_SYS_linux_futimesat:
case LINUX32_SYS_linux_linkat:
case LINUX32_SYS_linux_mkdirat:
case LINUX32_SYS_linux_mknodat:
case LINUX32_SYS_linux_openat:
case LINUX32_SYS_linux_readlinkat:
case LINUX32_SYS_linux_renameat:
case LINUX32_SYS_linux_unlinkat:
case LINUX32_SYS_linux_utimensat:
putchar('(');
print_integer_arg_valid(sysdecode_atfd, *ip);
c = ',';
ip++;
narg--;
break;
}
switch (ktr->ktr_code) {
case LINUX32_SYS_linux_access:
case LINUX32_SYS_linux_faccessat:
print_number(ip, narg, c);
putchar(',');
print_mask_arg(sysdecode_access_mode, *ip);
ip++;
narg--;
break;
case LINUX32_SYS_linux_chmod:
case LINUX32_SYS_fchmod:
case LINUX32_SYS_linux_fchmodat:
print_number(ip, narg, c);
putchar(',');
decode_filemode(*ip);
ip++;
narg--;
break;
case LINUX32_SYS_linux_mknodat:
print_number(ip, narg, c);
putchar(',');
decode_filemode(*ip);
ip++;
narg--;
break;
case LINUX32_SYS_linux_mkdir:
case LINUX32_SYS_linux_mkdirat:
print_number(ip, narg, c);
putchar(',');
decode_filemode(*ip);
ip++;
narg--;
break;
case LINUX32_SYS_linux_linkat:
case LINUX32_SYS_linux_renameat:
case LINUX32_SYS_linux_symlinkat:
print_number(ip, narg, c);
putchar(',');
print_integer_arg_valid(sysdecode_atfd, *ip);
ip++;
narg--;
print_number(ip, narg, c);
break;
case LINUX32_SYS_linux_fchownat:
print_number(ip, narg, c);
print_number(ip, narg, c);
print_number(ip, narg, c);
break;
case LINUX32_SYS_linux_fstatat64:
case LINUX32_SYS_linux_utimensat:
print_number(ip, narg, c);
print_number(ip, narg, c);
break;
case LINUX32_SYS_linux_unlinkat:
print_number(ip, narg, c);
break;
case LINUX32_SYS_linux_clock_gettime:
case LINUX32_SYS_linux_clock_settime:
case LINUX32_SYS_linux_clock_getres:
case LINUX32_SYS_linux_timer_create:
case LINUX32_SYS_linux_clock_gettime64:
case LINUX32_SYS_linux_clock_settime64:
case LINUX32_SYS_linux_clock_getres_time64:
putchar('(');
sysdecode_linux_clockid(stdout, *ip);
c = ',';
ip++;
narg--;
break;
case LINUX32_SYS_linux_clock_nanosleep:
putchar('(');
sysdecode_linux_clockid(stdout, *ip);
putchar(',');
ip++;
narg--;
print_mask_arg0(sysdecode_linux_clock_flags, *ip);
c = ',';
ip++;
narg--;
break;
case LINUX32_SYS_linux_clone:
putchar('(');
print_mask_arg(sysdecode_linux_clone_flags, *ip);
ip++;
narg--;
c = ',';
break;
case LINUX32_SYS_linux_kill:
case LINUX32_SYS_linux_tkill:
case LINUX32_SYS_linux_rt_sigqueueinfo:
print_decimal_number(ip, narg, c);
putchar(',');
print_linux_signal(*ip);
ip++;
narg--;
break;
case LINUX32_SYS_linux_tgkill:
case LINUX32_SYS_linux_rt_tgsigqueueinfo:
print_decimal_number(ip, narg, c);
print_decimal_number(ip, narg, c);
putchar(',');
print_linux_signal(*ip);
ip++;
narg--;
break;
case LINUX32_SYS_linux_open:
case LINUX32_SYS_linux_openat:
print_number(ip, narg, c);
putchar(',');
print_mask_arg(sysdecode_linux_open_flags, ip[0]);
if ((ip[0] & LINUX_O_CREAT) == LINUX_O_CREAT) {
putchar(',');
decode_filemode(ip[1]);
}
ip += 2;
narg -= 2;
break;
case LINUX32_SYS_linux_signal:
case LINUX32_SYS_linux_sigaction:
case LINUX32_SYS_linux_rt_sigaction:
putchar('(');
print_linux_signal(*ip);
ip++;
narg--;
c = ',';
break;
case LINUX32_SYS_linux_ftruncate:
case LINUX32_SYS_linux_truncate:
print_number(ip, narg, c);
print_number64(first, ip, narg, c);
break;
case LINUX32_SYS_linux_getitimer:
case LINUX32_SYS_linux_setitimer:
putchar('(');
print_integer_arg(sysdecode_itimer, *ip);
ip++;
narg--;
c = ',';
break;
case LINUX32_SYS_linux_rt_sigprocmask:
case LINUX32_SYS_linux_sigprocmask:
putchar('(');
print_integer_arg(sysdecode_linux_sigprocmask_how, *ip);
ip++;
narg--;
c = ',';
break;
}
switch (ktr->ktr_code) {
case LINUX32_SYS_linux_fchownat:
case LINUX32_SYS_linux_faccessat:
case LINUX32_SYS_linux_fchmodat:
case LINUX32_SYS_linux_fstatat64:
case LINUX32_SYS_linux_linkat:
case LINUX32_SYS_linux_unlinkat:
case LINUX32_SYS_linux_utimensat:
putchar(',');
print_mask_arg0(sysdecode_linux_atflags, *ip);
ip++;
narg--;
break;
}
*resc = c;
*resip = ip;
*resnarg = narg;
}
#endif /* __amd64__ */
static void
ktrsigset(const char *name, const l_sigset_t *mask, size_t sz)
{
unsigned long i, c;
printf("%s [ ", name);
c = 0;
for (i = 1; i <= sz * CHAR_BIT; i++) {
if (!LINUX_SIGISMEMBER(*mask, i))
continue;
if (c != 0)
printf(", ");
printf("%s", sysdecode_linux_signal(i));
c++;
}
if (c == 0)
printf("empty ]\n");
else
printf(" ]\n");
}
bool
ktrstruct_linux(const char *name, const char *data, size_t datalen)
{
l_sigset_t mask;
if (strcmp(name, "l_sigset_t") == 0) {
/* Old Linux sigset_t is one word size. */
if (datalen < sizeof(int) || datalen > sizeof(l_sigset_t))
return (false);
memcpy(&mask, data, datalen);
ktrsigset(name, &mask, datalen);
} else
return (false);
return (true);
}
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