[COMMIT osv master] syscall: expose truncate

[Commit Bot]

From: Waldemar Kozaczuk <jwkoz...@gmail.com>
Committer: Waldemar Kozaczuk <jwkoz...@gmail.com>
Branch: master

syscall: expose truncate

This patch make tst-truncate.cc pass on OSv when running with
Linux dynamic linker.

Signed-off-by: Waldemar Kozaczuk <jwkoz...@gmail.com>

---
diff --git a/linux.cc b/linux.cc
--- a/linux.cc
+++ b/linux.cc
@@ -705,6 +705,7 @@ TRACEPOINT(trace_syscall_sys_clone3, "%d <= %p %lu", int, struct clone_args *, s
#endif
TRACEPOINT(trace_syscall_prlimit64, "%d <= %u %d %p %p", int, pid_t, int, const struct rlimit *, struct rlimit *);
TRACEPOINT(trace_syscall_msync, "%d <= 0x%x %lu %d", int, void *, size_t, int);
+TRACEPOINT(trace_syscall_truncate, "%d <= %s %ld", int, const char *, off_t);

OSV_LIBC_API long syscall(long number, ...)
{
@@ -852,6 +853,7 @@ OSV_LIBC_API long syscall(long number, ...)
#endif
SYSCALL4(prlimit64, pid_t, int, const struct rlimit *, struct rlimit *);
SYSCALL3(msync, void *, size_t, int);
+ SYSCALL2(truncate, const char *, off_t);
}

debug_always("syscall(): unimplemented system call %d\n", number);