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Re: [Qemu-devel] [PATCH 01/11] linux-user: add eventfd support
From: |
Kirill A. Shutemov |
Subject: |
Re: [Qemu-devel] [PATCH 01/11] linux-user: add eventfd support |
Date: |
Fri, 21 Aug 2009 14:29:46 +0300 |
On Thu, Aug 13, 2009 at 11:06 PM, <address@hidden> wrote:
> 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>
I don't think that #include within function is a good idea.
> +#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, 2009/08/13
- Re: [Qemu-devel] [PATCH 01/11] linux-user: add eventfd support,
Kirill A. Shutemov <=
- [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
- [Qemu-devel] [PATCH 08/11] linux-user: define a couple of syscalls for non-uid16 targets, riku . voipio, 2009/08/13