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| author | Tuan Ta <qtt2@cornell.edu> | 2018-04-02 16:21:09 -0400 |
|---|---|---|
| committer | Tuan Ta <qtt2@cornell.edu> | 2019-02-08 15:18:22 +0000 |
| commit | cf45f22369f85397f113918a4f773b2613f0e19b (patch) | |
| tree | 6f5fb74061101f7be22edeaef7d81a95f35f6ae6 /src/kern | |
| parent | e5415671bd8871b99e754b5db75714a6492c0917 (diff) | |
| download | gem5-cf45f22369f85397f113918a4f773b2613f0e19b.tar.xz | |
sim,kern: support FUTEX_WAIT_BITSET and FUTEX_WAKE_BITSET ops
This patch adds support for two operations in futex system call:
FUTEX_WAIT_BITSET and FUTEX_WAKE_BITSET. The two operations are used to
selectively wake up a certain thread waiting on a futex variable.
Basically each thread waiting on a futex variable is associated with a
bitset that is checked when another thread tries to wake up all threads
waiting on the futex variable.
Change-Id: I2300e53b144d8fae226423fa2efb0238c1d93ef9
Reviewed-on: https://gem5-review.googlesource.com/c/9621
Reviewed-by: Brandon Potter <Brandon.Potter@amd.com>
Maintainer: Brandon Potter <Brandon.Potter@amd.com>
Diffstat (limited to 'src/kern')
| -rw-r--r-- | src/kern/linux/linux.hh | 13 |
1 files changed, 8 insertions, 5 deletions
diff --git a/src/kern/linux/linux.hh b/src/kern/linux/linux.hh index e559e0505..2da596814 100644 --- a/src/kern/linux/linux.hh +++ b/src/kern/linux/linux.hh @@ -239,11 +239,14 @@ class Linux : public OperatingSystem static std::string cpuOnline(Process *process, ThreadContext *tc); // For futex system call - static const unsigned TGT_FUTEX_WAIT = 0; - static const unsigned TGT_FUTEX_WAKE = 1; - static const unsigned TGT_EAGAIN = 11; - static const unsigned TGT_EWOULDBLOCK = TGT_EAGAIN; - static const unsigned TGT_FUTEX_PRIVATE_FLAG = 128; + static const unsigned TGT_FUTEX_WAIT = 0; + static const unsigned TGT_FUTEX_WAKE = 1; + static const unsigned TGT_FUTEX_WAIT_BITSET = 9; + static const unsigned TGT_FUTEX_WAKE_BITSET = 10; + static const unsigned TGT_EAGAIN = 11; + static const unsigned TGT_EWOULDBLOCK = TGT_EAGAIN; + static const unsigned TGT_FUTEX_PRIVATE_FLAG = 128; + static const unsigned TGT_FUTEX_CLOCK_REALTIME_FLAG = 256; // for *at syscalls static const int TGT_AT_FDCWD = -100; |