git: 8a0f6d8cfdb7 - main - kdump: Add preliminary support for decoding Linux syscalls
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Date: Wed, 22 Jun 2022 11:41:00 UTC
The branch main has been updated by dchagin:
URL: https://cgit.FreeBSD.org/src/commit/?id=8a0f6d8cfdb75a9484c456984ff55192f8b16886
commit 8a0f6d8cfdb75a9484c456984ff55192f8b16886
Author: Dmitry Chagin <dchagin@FreeBSD.org>
AuthorDate: 2022-06-22 11:03:56 +0000
Commit: Dmitry Chagin <dchagin@FreeBSD.org>
CommitDate: 2022-06-22 11:03:56 +0000
kdump: Add preliminary support for decoding Linux syscalls
Reviewed by: jhb
Differential revision: https://reviews.freebsd.org/D35216
MFC after: 2 weeks
---
usr.bin/kdump/Makefile | 7 ++
usr.bin/kdump/kdump.c | 57 +++++++++++----
usr.bin/kdump/kdump.h | 9 +++
usr.bin/kdump/linux.c | 185 +++++++++++++++++++++++++++++++++++++++++++++++++
4 files changed, 245 insertions(+), 13 deletions(-)
diff --git a/usr.bin/kdump/Makefile b/usr.bin/kdump/Makefile
index e826ac2d6dbf..c6e03347e097 100644
--- a/usr.bin/kdump/Makefile
+++ b/usr.bin/kdump/Makefile
@@ -17,4 +17,11 @@ LIBADD+= cap_pwd
CFLAGS+=-DWITH_CASPER
.endif
+.if ${MACHINE_CPUARCH} == "aarch64" || ${MACHINE_CPUARCH} == "amd64" || \
+ ${MACHINE_CPUARCH} == "i386"
+SRCS+= linux.c
+.endif
+
+CFLAGS.linux.c+= -I${SRCTOP}/sys
+
.include <bsd.prog.mk>
diff --git a/usr.bin/kdump/kdump.c b/usr.bin/kdump/kdump.c
index e54f8ec1deb5..79a5007bd1ec 100644
--- a/usr.bin/kdump/kdump.c
+++ b/usr.bin/kdump/kdump.c
@@ -124,6 +124,8 @@ void ktrfaultend(struct ktr_faultend *);
void ktrkevent(struct kevent *);
void ktrstructarray(struct ktr_struct_array *, size_t);
void ktrbitset(char *, struct bitset *, size_t);
+void ktrsyscall_freebsd(struct ktr_syscall *ktr, register_t **resip,
+ int *resnarg, char *resc, u_int sv_flags);
void usage(void);
#define TIMESTAMP_NONE 0x0
@@ -766,19 +768,52 @@ print_signal(int signo)
void
ktrsyscall(struct ktr_syscall *ktr, u_int sv_flags)
+{
+ int narg = ktr->ktr_narg;
+ register_t *ip;
+
+ syscallname(ktr->ktr_code, sv_flags);
+ ip = &ktr->ktr_args[0];
+ if (narg) {
+ char c = '(';
+ if (fancy) {
+ switch (sv_flags & SV_ABI_MASK) {
+ case SV_ABI_FREEBSD:
+ ktrsyscall_freebsd(ktr, &ip, &narg, &c,
+ sv_flags);
+ break;
+#ifdef SYSDECODE_HAVE_LINUX
+ case SV_ABI_LINUX:
+#ifdef __amd64__
+ if (sv_flags & SV_ILP32)
+ ktrsyscall_linux32(ktr, &ip,
+ &narg, &c);
+ else
+#endif
+ ktrsyscall_linux(ktr, &ip, &narg, &c);
+ break;
+#endif /* SYSDECODE_HAVE_LINUX */
+ }
+ }
+ while (narg > 0)
+ print_number(ip, narg, c);
+ putchar(')');
+ }
+ putchar('\n');
+}
+
+void
+ktrsyscall_freebsd(struct ktr_syscall *ktr, register_t **resip,
+ int *resnarg, char *resc, u_int sv_flags)
{
int narg = ktr->ktr_narg;
register_t *ip, *first;
intmax_t arg;
int quad_align, quad_slots;
- syscallname(ktr->ktr_code, sv_flags);
ip = first = &ktr->ktr_args[0];
- if (narg) {
- char c = '(';
- if (fancy &&
- (sv_flags == 0 ||
- (sv_flags & SV_ABI_MASK) == SV_ABI_FREEBSD)) {
+ char c = *resc;
+
quad_align = 0;
if (sv_flags & SV_ILP32) {
#ifdef __powerpc__
@@ -1510,13 +1545,9 @@ ktrsyscall(struct ktr_syscall *ktr, u_int sv_flags)
narg--;
break;
}
- }
- while (narg > 0) {
- print_number(ip, narg, c);
- }
- putchar(')');
- }
- putchar('\n');
+ *resc = c;
+ *resip = ip;
+ *resnarg = narg;
}
void
diff --git a/usr.bin/kdump/kdump.h b/usr.bin/kdump/kdump.h
index faf8e03e541d..dc0515397f48 100644
--- a/usr.bin/kdump/kdump.h
+++ b/usr.bin/kdump/kdump.h
@@ -76,4 +76,13 @@ void print_mask_argul(bool (*decoder)(FILE *, u_long, u_long *),
bool print_mask_arg_part(bool (*decoder)(FILE *, int, int *),
int value, int *rem);
+#ifdef SYSDECODE_HAVE_LINUX
+void ktrsyscall_linux(struct ktr_syscall *ktr, register_t **resip,
+ int *resnarg, char *resc);
+#ifdef __amd64__
+void ktrsyscall_linux32(struct ktr_syscall *ktr, register_t **resip,
+ int *resnarg, char *resc);
+#endif
+#endif /* SYSDECODE_HAVE_LINUX */
+
#endif /* !__KDUMP_H__ */
diff --git a/usr.bin/kdump/linux.c b/usr.bin/kdump/linux.c
new file mode 100644
index 000000000000..e584b54db36c
--- /dev/null
+++ b/usr.bin/kdump/linux.c
@@ -0,0 +1,185 @@
+/*-
+ * SPDX-License-Identifier: BSD-2-Clause-FreeBSD
+ *
+ * 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 <stddef.h>
+#include <sysdecode.h>
+
+#include "kdump.h"
+
+#ifdef __amd64__
+#include <amd64/linux/linux_syscall.h>
+#include <amd64/linux32/linux32_syscall.h>
+#elif __aarch64__
+#include <arm64/linux/linux_syscall.h>
+#elif __i386__
+#include <i386/linux/linux_syscall.h>
+#endif
+
+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_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_kill:
+ case LINUX_SYS_linux_tkill:
+ case LINUX_SYS_linux_rt_sigqueueinfo:
+ print_number(ip, narg, c);
+ putchar(',');
+ print_linux_signal(*ip);
+ ip++;
+ narg--;
+ break;
+ case LINUX_SYS_linux_tgkill:
+ case LINUX_SYS_linux_rt_tgsigqueueinfo:
+ print_number(ip, narg, c);
+ print_number(ip, narg, c);
+ putchar(',');
+ print_linux_signal(*ip);
+ ip++;
+ narg--;
+ 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;
+ }
+ *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_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_kill:
+ case LINUX32_SYS_linux_tkill:
+ case LINUX32_SYS_linux_rt_sigqueueinfo:
+ print_number(ip, narg, c);
+ putchar(',');
+ print_linux_signal(*ip);
+ ip++;
+ narg--;
+ break;
+ case LINUX32_SYS_linux_tgkill:
+ case LINUX32_SYS_linux_rt_tgsigqueueinfo:
+ print_number(ip, narg, c);
+ print_number(ip, narg, c);
+ putchar(',');
+ print_linux_signal(*ip);
+ ip++;
+ narg--;
+ 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;
+ }
+ *resc = c;
+ *resip = ip;
+ *resnarg = narg;
+}
+#endif /* __amd64__ */