# HG changeset patch
# User Timothy M. Jones <tjon...@inf.ed.ac.uk>
# Date 1255511953 -3600
# Node ID 5841e97659cf0335dd53610636be9d7f4308701d
# Parent d054d975bb9302a67db445daa3e5cf801de5f556
Implementation of the times system call.
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 +136,17 @@
int64_t tv_usec; //!< microseconds
};
+ /// Clock ticks per second, for times().
+ static const int _SC_CLK_TCK = 100;
+
+ /// 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
@@ -1131,6 +1131,30 @@
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 clocks)
+ int64_t clocks = curTick * OS::_SC_CLK_TCK / Clock::Int::s;
+ bufp->tms_utime = clocks;
+ 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 clocks;
+}
--
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