diff options
Diffstat (limited to 'libgloss/nds32/syscall_extra.h')
| -rw-r--r-- | libgloss/nds32/syscall_extra.h | 23 |
1 files changed, 23 insertions, 0 deletions
diff --git a/libgloss/nds32/syscall_extra.h b/libgloss/nds32/syscall_extra.h index f2ab2d562..73d36b973 100644 --- a/libgloss/nds32/syscall_extra.h +++ b/libgloss/nds32/syscall_extra.h @@ -38,4 +38,27 @@ SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. #define SYS_geterr 6001 + +/* Define macros that generate assembly output. */ +.macro SYS_WRAPPER name num + .text + .global \name + .type \name, @function + .align 2 +\name: + /* Make syscall with arg=`\num'. + Reture value `-1' stored in $r0 means there is something wrong. + If there is something wrong, make syscall to get `SYS_geterr' to get + error code to see what exactly happens and store it in errno . */ + syscall \num /* Make syscall with arg=`\num'. */ + addi $r1, $r0, 1 + bnez $r1, 1f /* Branch if success. */ + syscall SYS_geterr /* There is something wrong. */ + s.w $r0, errno /* Store error code into errno. */ + move $r0, -1 +1: + ret + .size \name, .-\name +.endm + #endif /* _SYSCALL_EXTRA_H */ |