lowlevel-68000: debug the new syscall ABI

Dumb bug removed and it now seems to work rather better

diff --git a/Kernel/lowlevel-68000.S b/Kernel/lowlevel-68000.S
index a80450d..dc963a5 100644 (file)
--- a/Kernel/lowlevel-68000.S
+++ b/Kernel/lowlevel-68000.S
@@ -485,12 +485,12 @@ trap15:           move.w #SIGTRAP,trap_id                 ; by convention
 ;              fork is special see the fork code.
 ;
 trap14:                move.l a5,-(sp)         ; must be first to match fork
-               move.l usp,a5
-               move.l a5,U_DATA__U_SYSCALL_SP(a5)
                move.l udata_shadow,a5
                move.b d0,U_DATA__U_CALLNO(a5)
                move.b #1,U_DATA__U_INSYS(a5)
                movem.l d1/a0-a2,U_DATA__U_ARGN(a5)
+               move.l usp,a0
+               move.l a0,U_DATA__U_SYSCALL_SP(a5)
                move.b #1,d0
                move.b d0,kernel_flag
                ; FIXME: EI per platform really