diff options
Diffstat (limited to 'libgloss/nds32/_isatty.S')
| -rw-r--r-- | libgloss/nds32/_isatty.S | 26 |
1 files changed, 25 insertions, 1 deletions
diff --git a/libgloss/nds32/_isatty.S b/libgloss/nds32/_isatty.S index c90028afc..37776ed7d 100644 --- a/libgloss/nds32/_isatty.S +++ b/libgloss/nds32/_isatty.S @@ -27,6 +27,15 @@ ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */ +/* + SYNOPSIS + #include <unistd.h> + int isatty(int fildes); + RETURN VALUE + The isatty() function shall return 1 if fildes is associated with + a terminal; otherwise, it shall return 0 and may set errno + to indicate the error. +*/ #ifdef __NDS32_VH__ #include "vh.h" @@ -37,6 +46,21 @@ TYPE0 _isatty, VH_ISATTY #include "../syscall.h" #include "syscall_extra.h" -SYS_WRAPPER _isatty, SYS_isatty + .text + .global _isatty + .type _isatty, @function + .align 2 +_isatty: + syscall SYS_isatty /* Make syscall with SWID=`SYS_isatty'. + Reture value `0' stored in $r0 means + there is something wrong. */ + bnez $r0, 1f /* Branch if success. */ + syscall SYS_geterr /* There is something wrong. */ + l.w $r15, _impure_ptr + swi $r0, [$r15] /* Set errno. */ + move $r0, #0 +1: + ret + .size _isatty, .-_isatty #endif /* not __NDS32_VH__ */ |