Commit a8fd1aba authored by Peter Maydell's avatar Peter Maydell Committed by Riku Voipio
Browse files

linux-user: Implement sendfile and sendfile64 



Implement the sendfile and sendfile64 syscalls. This implementation
passes all the LTP test cases for these syscalls.

Signed-off-by: default avatarPeter Maydell <peter.maydell@linaro.org>
Reviewed-by: default avatarRichard Henderson <rth@twiddle.net>
Signed-off-by: default avatarRiku Voipio <riku.voipio@linaro.org>
parent dfae8e00

configure

+17 −0
Original line number Diff line number Diff line
@@ -2760,6 +2760,20 @@ if compile_prog "" "" ; then 
  epoll_pwait=yes

fi



# check for sendfile support

sendfile=no

cat > $TMPC << EOF

#include <sys/sendfile.h>



int main(void)

{

    return sendfile(0, 0, 0, 0);

}

EOF

if compile_prog "" "" ; then

  sendfile=yes

fi



# Check if tools are available to build documentation.

if test "$docs" != "no" ; then

  if has makeinfo && has pod2man; then
@@ -3628,6 +3642,9 @@ fi 
if test "$epoll_pwait" = "yes" ; then

  echo "CONFIG_EPOLL_PWAIT=y" >> $config_host_mak

fi

if test "$sendfile" = "yes" ; then

  echo "CONFIG_SENDFILE=y" >> $config_host_mak

fi

if test "$inotify" = "yes" ; then

  echo "CONFIG_INOTIFY=y" >> $config_host_mak

fi

linux-user/syscall.c

+53 −0
Original line number Diff line number Diff line
@@ -78,6 +78,9 @@ int __clone2(int (*fn)(void *), void *child_stack_base, 
#ifdef CONFIG_ATTR

#include "qemu/xattr.h"

#endif

#ifdef CONFIG_SENDFILE

#include <sys/sendfile.h>

#endif



#define termios host_termios

#define winsize host_winsize
@@ -7531,8 +7534,58 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1, 
#else

        goto unimplemented;

#endif



#ifdef CONFIG_SENDFILE

    case TARGET_NR_sendfile:

    {

        off_t *offp = NULL;

        off_t off;

        if (arg3) {

            ret = get_user_sal(off, arg3);

            if (is_error(ret)) {

                break;

            }

            offp = &off;

        }

        ret = get_errno(sendfile(arg1, arg2, offp, arg4));

        if (!is_error(ret) && arg3) {

            abi_long ret2 = put_user_sal(off, arg3);

            if (is_error(ret2)) {

                ret = ret2;

            }

        }

        break;

    }

#ifdef TARGET_NR_sendfile64

    case TARGET_NR_sendfile64:

    {

        off_t *offp = NULL;

        off_t off;

        if (arg3) {

            ret = get_user_s64(off, arg3);

            if (is_error(ret)) {

                break;

            }

            offp = &off;

        }

        ret = get_errno(sendfile(arg1, arg2, offp, arg4));

        if (!is_error(ret) && arg3) {

            abi_long ret2 = put_user_s64(off, arg3);

            if (is_error(ret2)) {

                ret = ret2;

            }

        }

        break;

    }

#endif

#else

    case TARGET_NR_sendfile:

#ifdef TARGET_NR_sendfile64:

    case TARGET_NR_sendfile64:

#endif

        goto unimplemented;

#endif



#ifdef TARGET_NR_getpmsg

    case TARGET_NR_getpmsg:

        goto unimplemented;