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[Qemu-devel] [PATCH] linux-user: dup3, fallocate syscalls
From: |
Ulrich Hecht |
Subject: |
[Qemu-devel] [PATCH] linux-user: dup3, fallocate syscalls |
Date: |
Thu, 30 Jul 2009 16:45:55 +0200 |
implementations of dup3 and fallocate that are good enough to fool LTP
updated fallocate check to new configure, added dup3 check as suggested
by Jan-Simon Möller
Signed-off-by: Ulrich Hecht <address@hidden>
---
configure | 36 ++++++++++++++++++++++++++++++++++++
linux-user/syscall.c | 12 ++++++++++++
2 files changed, 48 insertions(+), 0 deletions(-)
diff --git a/configure b/configure
index 8160bed..2329f88 100755
--- a/configure
+++ b/configure
@@ -1366,6 +1366,36 @@ if $cc $ARCH_CFLAGS -o $TMPE $TMPC 2> /dev/null ; then
splice=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 $TMPC 2> /dev/null ; then
+ dup3=yes
+fi
+
# Check if tools are available to build documentation.
if test "$build_docs" = "yes" -a \( ! -x "`which texi2html 2>/dev/null`" -o !
-x "`which pod2man 2>/dev/null`" \) ; then
build_docs="no"
@@ -1639,6 +1669,12 @@ fi
if test "$splice" = "yes" ; then
echo "CONFIG_SPLICE=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
diff --git a/linux-user/syscall.c b/linux-user/syscall.c
index 31cf151..d105b8e 100644
--- a/linux-user/syscall.c
+++ b/linux-user/syscall.c
@@ -3681,8 +3681,10 @@ static int target_to_host_fcntl_cmd(int cmd)
return F_SETLEASE;
case TARGET_F_GETLEASE:
return F_GETLEASE;
+#ifdef F_DUPFD_CLOEXEC
case TARGET_F_DUPFD_CLOEXEC:
return F_DUPFD_CLOEXEC;
+#endif
case TARGET_F_NOTIFY:
return F_NOTIFY;
default:
@@ -4732,6 +4734,11 @@ 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(TARGET_NR_dup3) && defined(CONFIG_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());
@@ -6976,6 +6983,11 @@ abi_long do_syscall(void *cpu_env, int num, abi_long
arg1,
break;
#endif
#endif /* CONFIG_SPLICE */
+#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);
--
1.6.2.1
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