diff options
| author | Riku Voipio <riku.voipio@iki.fi> | 2009-08-12 15:08:24 +0300 |
|---|---|---|
| committer | Riku Voipio <riku.voipio@iki.fi> | 2009-08-25 17:15:26 +0300 |
| commit | c2882b96545eeabf16767c6effa836e6f9991018 (patch) | |
| tree | b49382d3bbe58cdb763328ec2b4b713d0a095020 | |
| parent | 4e6f6d4c20252c6900f01787559b97a559c0b402 (diff) | |
linux-user: add eventfd support
Straightforward implementation. This syscall is rare enough that we
don't need to support the odder cases, just disable it if host glibc
is too old.
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
| -rwxr-xr-x | configure | 18 | ||||
| -rw-r--r-- | linux-user/syscall.c | 15 |
2 files changed, 33 insertions, 0 deletions
@@ -1322,6 +1322,21 @@ if compile_prog "" "" ; then splice=yes fi +# check if eventfd is supported +eventfd=no +cat > $TMPC << EOF +#include <sys/eventfd.h> + +int main(void) +{ + int efd = eventfd(0, 0); + return 0; +} +EOF +if compile_prog "" "" ; then + eventfd=yes +fi + # Check if tools are available to build documentation. if test "$build_docs" = "yes" -a \( ! -x "`which texi2html 2>/dev/null`" -o ! -x "`which pod2man 2>/dev/null`" \) ; then build_docs="no" @@ -1659,6 +1674,9 @@ fi if test "$splice" = "yes" ; then echo "CONFIG_SPLICE=y" >> $config_host_mak fi +if test "$eventfd" = "yes" ; then + echo "CONFIG_EVENTFD=y" >> $config_host_mak +fi if test "$inotify" = "yes" ; then echo "CONFIG_INOTIFY=y" >> $config_host_mak fi diff --git a/linux-user/syscall.c b/linux-user/syscall.c index 673eed4ece..603fec265d 100644 --- a/linux-user/syscall.c +++ b/linux-user/syscall.c @@ -60,6 +60,9 @@ #ifdef TARGET_GPROF #include <sys/gmon.h> #endif +#ifdef CONFIG_EVENTFD +#include <sys/eventfd.h> +#endif #define termios host_termios #define winsize host_winsize @@ -6974,6 +6977,18 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, break; #endif #endif /* CONFIG_SPLICE */ +#ifdef CONFIG_EVENTFD +#if defined(TARGET_NR_eventfd) + case TARGET_NR_eventfd: + ret = get_errno(eventfd(arg1, 0)); + break; +#endif +#if defined(TARGET_NR_eventfd2) + case TARGET_NR_eventfd2: + ret = get_errno(eventfd(arg1, arg2)); + break; +#endif +#endif /* CONFIG_EVENTFD */ default: unimplemented: gemu_log("qemu: Unsupported syscall: %d\n", num); |