Hi everyone,
This is my version of the times system call. It adds 'struct tms' into
the kernel and fills it with the current clock tick on a system call.
Comments are welcome and it can be used by anyone.
Cheers
Tim
PS I'm not sure of the etiquette here. I'm assuming that posting these
patches like this is useful, but please tell me if I'm wrong :-/
--
The University of Edinburgh is a charitable body, registered in
Scotland, with registration number SC005336.
diff --git a/src/kern/linux/linux.hh b/src/kern/linux/linux.hh
--- a/src/kern/linux/linux.hh
+++ b/src/kern/linux/linux.hh
@@ -136,6 +136,14 @@
int64_t tv_usec; //!< microseconds
};
+ /// For times().
+ struct tms {
+ int64_t tms_utime; //!< user time
+ int64_t tms_stime; //!< system time
+ int64_t tms_cutime; //!< user time of children
+ int64_t tms_cstime; //!< system time of children
+ };
+
// For writev/readv
struct tgt_iovec {
uint64_t iov_base; // void *
diff --git a/src/sim/syscall_emul.hh b/src/sim/syscall_emul.hh
--- a/src/sim/syscall_emul.hh
+++ b/src/sim/syscall_emul.hh
@@ -1108,6 +1108,29 @@
return 0;
}
+/// Target times() function.
+template <class OS>
+SyscallReturn
+timesFunc(SyscallDesc *desc, int callnum, LiveProcess *process,
+ ThreadContext *tc)
+{
+ TypedBufferArg<typename OS::tms> bufp(process->getSyscallArg(tc, 0));
+
+ // Fill in the time structure (in clock ticks)
+ bufp->tms_utime = curTick;
+ bufp->tms_stime = 0;
+ bufp->tms_cutime = 0;
+ bufp->tms_cstime = 0;
+
+ // Convert to host endianness
+ bufp->tms_utime = htog(bufp->tms_utime);
+
+ // Write back
+ bufp.copyOut(tc->getMemPort());
+
+ // Return clock ticks since system boot
+ return curTick;
+}
_______________________________________________
m5-dev mailing list
[email protected]
http://m5sim.org/mailman/listinfo/m5-dev
