changeset 5e0fcc528fe5 in /z/repo/m5
details: http://repo.m5sim.org/m5?cmd=changeset;node=5e0fcc528fe5
description:
syscall: Implementation of the times system call
diffstat:
2 files changed, 35 insertions(+)
src/kern/linux/linux.hh | 11 +++++++++++
src/sim/syscall_emul.hh | 24 ++++++++++++++++++++++++
diffs (55 lines):
diff -r 9c33426d404a -r 5e0fcc528fe5 src/kern/linux/linux.hh
--- a/src/kern/linux/linux.hh Mon Oct 19 17:29:34 2009 -0400
+++ b/src/kern/linux/linux.hh Sat Oct 24 10:53:57 2009 -0700
@@ -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 -r 9c33426d404a -r 5e0fcc528fe5 src/sim/syscall_emul.hh
--- a/src/sim/syscall_emul.hh Mon Oct 19 17:29:34 2009 -0400
+++ b/src/sim/syscall_emul.hh Sat Oct 24 10:53:57 2009 -0700
@@ -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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