sys/freebsd: avoid mangling syscall names

syz-extract was removing certain prefixes from syscall names, but this
caused some problems:
- freebsd* prefixes are for compatibility syscalls when the syscall ABI
  has changed.  For instance, we have both fstat() and
  freebsd11_fstat(), and it is desirable to fuzz them both.
- Stripping prefixes may leave us with undefined SYS_ constants.  This
  resulted in some test failures in pkg/csource, which emitted code
  referencing SYS_semctl when it should have been SYS___semctl.

Fix the problem by updating syscall descriptions to match the names
given by the FreeBSD kernel.  Add some new descriptions for
compatibility syscalls, fix the mknodat() description (dev_t is now 64
bits wide on FreeBSD), and remove mknod$loop, which appears to be
Linux-specific.

2 files changed, 22 insertions, 21 deletions

diff --git a/executor/defs.h b/executor/defs.h
index 8e2a70847..db674ec2d 100644
--- a/executor/defs.h
+++ b/executor/defs.h
@@ -20,7 +20,7 @@
 
 #if GOARCH_amd64
 #define GOARCH "amd64"
-#define SYZ_REVISION "87222f38848c14df07a6a0304da0b1915e3396bb"
+#define SYZ_REVISION "873616249e74ae100e93afb6a14e4fef92b3acc4"
 #define SYZ_EXECUTOR_USES_FORK_SERVER 1
 #define SYZ_EXECUTOR_USES_SHMEM 1
 #define SYZ_PAGE_SIZE 4096
diff --git a/executor/syscalls.h b/executor/syscalls.h
index b4a05b087..1be9f2cb7 100644
--- a/executor/syscalls.h
+++ b/executor/syscalls.h
@@ -226,6 +226,20 @@ const call_t syscalls[] = {
 
 #if GOARCH_amd64
 const call_t syscalls[] = {
+    {"__getcwd", 326},
+    {"__semctl$GETALL", 510},
+    {"__semctl$GETNCNT", 510},
+    {"__semctl$GETPID", 510},
+    {"__semctl$GETVAL", 510},
+    {"__semctl$GETZCNT", 510},
+    {"__semctl$IPC_INFO", 510},
+    {"__semctl$IPC_RMID", 510},
+    {"__semctl$IPC_SET", 510},
+    {"__semctl$IPC_STAT", 510},
+    {"__semctl$SEM_INFO", 510},
+    {"__semctl$SEM_STAT", 510},
+    {"__semctl$SETALL", 510},
+    {"__semctl$SETVAL", 510},
     {"accept", 30},
     {"accept$inet", 30},
     {"accept$inet6", 30},
@@ -270,12 +284,17 @@ const call_t syscalls[] = {
     {"fcntl$setstatus", 92},
     {"fdatasync", 550},
     {"flock", 131},
+    {"freebsd10_pipe", 42},
+    {"freebsd11_fstat", 189},
+    {"freebsd11_getdents", 272},
+    {"freebsd11_lstat", 190},
+    {"freebsd11_mknod", 14},
+    {"freebsd11_mknodat", 498},
+    {"freebsd11_stat", 188},
     {"fstat", 551},
     {"fsync", 95},
     {"ftruncate", 480},
     {"futimesat", 494},
-    {"getcwd", 326},
-    {"getdents", 272},
     {"getegid", 43},
     {"geteuid", 25},
     {"getgid", 47},
@@ -409,13 +428,10 @@ const call_t syscalls[] = {
     {"linkat", 495},
     {"listen", 106},
     {"lseek", 478},
-    {"lstat", 190},
     {"madvise", 75},
     {"mincore", 78},
     {"mkdir", 136},
     {"mkdirat", 496},
-    {"mknod", 14},
-    {"mknod$loop", 14},
     {"mknodat", 559},
     {"mlock", 203},
     {"mlockall", 324},
@@ -437,7 +453,6 @@ const call_t syscalls[] = {
     {"open", 5},
     {"open$dir", 5},
     {"openat", 499},
-    {"pipe", 42},
     {"pipe2", 542},
     {"poll", 209},
     {"ppoll", 545},
@@ -456,19 +471,6 @@ const call_t syscalls[] = {
     {"renameat", 501},
     {"rmdir", 137},
     {"select", 93},
-    {"semctl$GETALL", 510},
-    {"semctl$GETNCNT", 510},
-    {"semctl$GETPID", 510},
-    {"semctl$GETVAL", 510},
-    {"semctl$GETZCNT", 510},
-    {"semctl$IPC_INFO", 510},
-    {"semctl$IPC_RMID", 510},
-    {"semctl$IPC_SET", 510},
-    {"semctl$IPC_STAT", 510},
-    {"semctl$SEM_INFO", 510},
-    {"semctl$SEM_STAT", 510},
-    {"semctl$SETALL", 510},
-    {"semctl$SETVAL", 510},
     {"semget", 221},
     {"semget$private", 221},
     {"semop", 222},
@@ -647,7 +649,6 @@ const call_t syscalls[] = {
     {"socket$unix", 97},
     {"socketpair", 135},
     {"socketpair$unix", 135},
-    {"stat", 188},
     {"symlink", 57},
     {"symlinkat", 502},
     {"sync", 36},