Index: usr.bin/kdump/Makefile
===================================================================
--- usr.bin/kdump/Makefile
+++ usr.bin/kdump/Makefile
@@ -8,6 +8,8 @@
 PROG=		kdump
 SRCS=		kdump.c subr.c
 CFLAGS+=	-I${SRCTOP}/usr.bin/ktrace
+CFLAGS+=	-I${SRCTOP}/lib/libsysdecode
+CFLAGS+=	-I${SRCTOP}/sys
 
 LIBADD=		sysdecode
 .if ${MK_CASPER} != "no"
Index: usr.bin/kdump/kdump.c
===================================================================
--- usr.bin/kdump/kdump.c
+++ usr.bin/kdump/kdump.c
@@ -99,6 +99,17 @@
 #include <casper/cap_pwd.h>
 #endif
 
+#if defined(__amd64__)
+#include <amd64/linux/linux_syscall.h>
+#include <amd64/linux32/linux32_syscall.h>
+#endif
+#if defined(__aarch64__)
+#include <arm64/linux/linux_syscall.h>
+#endif
+#if defined(__i386__)
+#include <i386/linux/linux_syscall.h>
+#endif
+
 int fetchprocinfo(struct ktr_header *, u_int *);
 u_int findabi(struct ktr_header *);
 int fread_tail(void *, int, int);
@@ -125,6 +136,14 @@
 void ktrstructarray(struct ktr_struct_array *, size_t);
 void ktrbitset(char *, struct bitset *, size_t);
 void ktrsigset(char *, sigset_t *, size_t);
+void ktrsyscall_freebsd(struct ktr_syscall *ktr, register_t **resip,
+    int *resnarg, char *resc, u_int sv_flags);
+void ktrsyscall_linux(struct ktr_syscall *ktr, register_t **resip,
+    int *resnarg, char *resc);
+#if defined(__amd64__)
+void ktrsyscall_linux32(struct ktr_syscall *ktr, register_t **resip,
+    int *resnarg, char *resc);
+#endif
 void usage(void);
 
 #define	TIMESTAMP_NONE		0x0
@@ -796,21 +815,64 @@
 		printf("SIG %d", signo);
 }
 
+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(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;
+			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;
+			}
+		}
+		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__
@@ -1542,13 +1604,9 @@
 				narg--;
 				break;
 			}
-		}
-		while (narg > 0) {
-			print_number(ip, narg, c);
-		}
-		putchar(')');
-	}
-	putchar('\n');
+	*resc = c;
+	*resip = ip;
+	*resnarg = narg;
 }
 
 void
@@ -2286,6 +2344,112 @@
 	return;
 }
 
+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_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);
+		putchar(',');
+		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_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);
+		putchar(',');
+		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__ */
+
 void
 usage(void)
 {