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implementations of dup3 and fallocate that are good enough to fool LTP

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updated fallocate check to new configure, added dup3 check as suggested
by Jan-Simon Möller.

Riku: updated to apply to current git.

Signed-off-by: Ulrich Hecht <uli@suse.de>
Signed-off-by: Riku Voipio <riku.voipio@iki.fi>
This commit is contained in:
Ulrich Hecht 2009-09-17 20:22:14 +03:00 committed by Riku Voipio
parent 5041fccd8e
commit d092793872
2 changed files with 46 additions and 0 deletions
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36
configure vendored
View File

@ -1569,6 +1569,36 @@ if compile_prog "" "" ; then
eventfd=yes
fi
# check for fallocate
fallocate=no
cat > $TMPC << EOF
#include <fcntl.h>
int main(void)
{
fallocate(0, 0, 0, 0);
return 0;
}
EOF
if $cc $ARCH_CFLAGS -o $TMPE $TMPC 2> /dev/null ; then
fallocate=yes
fi
# check for dup3
dup3=no
cat > $TMPC << EOF
#include <unistd.h>
int main(void)
{
dup3(0, 0, 0);
return 0;
}
EOF
if $cc $ARCH_CFLAGS -o $TMPE $TMPC 2> /dev/null ; then
dup3=yes
fi
# Check if tools are available to build documentation.
if test "$docs" != "no" ; then
if test -x "`which texi2html 2>/dev/null`" -a \
@ -1950,6 +1980,12 @@ fi
if test "$eventfd" = "yes" ; then
echo "CONFIG_EVENTFD=y" >> $config_host_mak
fi
if test "$fallocate" = "yes" ; then
echo "CONFIG_FALLOCATE=y" >> $config_host_mak
fi
if test "$dup3" = "yes" ; then
echo "CONFIG_DUP3=y" >> $config_host_mak
fi
if test "$inotify" = "yes" ; then
echo "CONFIG_INOTIFY=y" >> $config_host_mak
fi

10
linux-user/syscall.c
View File

@ -4746,6 +4746,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
case TARGET_NR_dup2:
ret = get_errno(dup2(arg1, arg2));
break;
#if defined(CONFIG_DUP3) && defined(TARGET_NR_dup3)
case TARGET_NR_dup3:
ret = get_errno(dup3(arg1, arg2, arg3));
break;
#endif
#ifdef TARGET_NR_getppid /* not on alpha */
case TARGET_NR_getppid:
ret = get_errno(getppid());
@ -7013,6 +7018,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long arg1,
break;
#endif
#endif /* CONFIG_EVENTFD */
#if defined(CONFIG_FALLOCATE) && defined(TARGET_NR_fallocate)
case TARGET_NR_fallocate:
ret = get_errno(fallocate(arg1, arg2, arg3, arg4));
break;
#endif
default:
unimplemented:
gemu_log("qemu: Unsupported syscall: %d\n", num);