syscall_emul: fix warn_once behavior

The current ignoreWarnOnceFunc doesn't really work as expected,
since it will only generate one warning total, for whichever
"warn-once" syscall is invoked first.  This patch fixes that
behavior by keeping a "warned" flag in the SyscallDesc object,
allowing suitably flagged syscalls to warn exactly once per
syscall.

1 files changed, 3 insertions, 3 deletions

diff --git a/src/arch/x86/linux/process.cc b/src/arch/x86/linux/process.cc
index 9a2bb96b5..ed17d7388 100644
--- a/src/arch/x86/linux/process.cc
+++ b/src/arch/x86/linux/process.cc
@@ -231,8 +231,8 @@ static SyscallDesc syscallDescs64[] = {
     /*  10 */ SyscallDesc("mprotect", ignoreFunc),
     /*  11 */ SyscallDesc("munmap", munmapFunc),
     /*  12 */ SyscallDesc("brk", brkFunc),
-    /*  13 */ SyscallDesc("rt_sigaction", ignoreFunc),
-    /*  14 */ SyscallDesc("rt_sigprocmask", ignoreFunc),
+    /*  13 */ SyscallDesc("rt_sigaction", ignoreFunc, SyscallDesc::WarnOnce),
+    /*  14 */ SyscallDesc("rt_sigprocmask", ignoreFunc, SyscallDesc::WarnOnce),
     /*  15 */ SyscallDesc("rt_sigreturn", unimplementedFunc),
     /*  16 */ SyscallDesc("ioctl", ioctlFunc<X86Linux64>),
     /*  17 */ SyscallDesc("pread64", unimplementedFunc),
@@ -253,7 +253,7 @@ static SyscallDesc syscallDescs64[] = {
     /*  32 */ SyscallDesc("dup", dupFunc),
     /*  33 */ SyscallDesc("dup2", unimplementedFunc),
     /*  34 */ SyscallDesc("pause", unimplementedFunc),
-    /*  35 */ SyscallDesc("nanosleep", unimplementedFunc),
+    /*  35 */ SyscallDesc("nanosleep", ignoreFunc, SyscallDesc::WarnOnce),
     /*  36 */ SyscallDesc("getitimer", unimplementedFunc),
     /*  37 */ SyscallDesc("alarm", unimplementedFunc),
     /*  38 */ SyscallDesc("setitimer", unimplementedFunc),