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[Qemu-devel] [PATCH 01/11] linux-user: add eventfd support
From: |
riku . voipio |
Subject: |
[Qemu-devel] [PATCH 01/11] linux-user: add eventfd support |
Date: |
Thu, 13 Aug 2009 23:06:14 +0300 |
From: Riku Voipio <address@hidden>
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 <address@hidden>
---
configure | 18 ++++++++++++++++++
linux-user/syscall.c | 13 +++++++++++++
2 files changed, 31 insertions(+), 0 deletions(-)
diff --git a/configure b/configure
index 0b2c721..c52f1cf 100755
--- a/configure
+++ b/configure
@@ -1345,6 +1345,21 @@ 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"
@@ -1684,6 +1699,9 @@ 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 673eed4..3b1ed60 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -6974,6 +6974,19 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
break;
#endif
#endif /* CONFIG_SPLICE */
+#ifdef CONFIG_EVENTFD
+#include <sys/eventfd.h>
+#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);
--
1.6.2.1
- [Qemu-devel] [PATCH 00/11] linux-user patches for HEAD, riku . voipio, 2009/08/13
- [Qemu-devel] [PATCH 02/11] m68k,linux-user: add setup_frame, riku . voipio, 2009/08/13
- [Qemu-devel] [PATCH 01/11] linux-user: add eventfd support,
riku . voipio <=
- [Qemu-devel] [PATCH 04/11] m68k, linux-user: enable sigaltstack(), riku . voipio, 2009/08/13
- [Qemu-devel] [PATCH 03/11] m68k, linux-user: add setup_rt_frame, riku . voipio, 2009/08/13
- [Qemu-devel] [PATCH 05/11] linux-user: fix mq_* compilation problems, riku . voipio, 2009/08/13
- [Qemu-devel] [PATCH 11/11] linux-user: Rewrite mmap_find_vma() to work fine on 64-bit hosts with 32-bit targets, riku . voipio, 2009/08/13
- [Qemu-devel] [PATCH 06/11] linux-user: fcntl fixes for LTP, riku . voipio, 2009/08/13
- [Qemu-devel] [PATCH 10/11] linux-user: zero fstat buffer to initialize nsec fields, riku . voipio, 2009/08/13
- [Qemu-devel] [PATCH 07/11] linux-user: enable getdents for > 32-bit systems, riku . voipio, 2009/08/13
- [Qemu-devel] [PATCH 09/11] linux-user: fadvise64 implementation, riku . voipio, 2009/08/13