/* * .seg "data" * .asciz "@(#)trap.s 1.1 92/07/30 SMI" * Copyright (c) 1988 by Sun Microsystems, Inc. */ #include #define SAVE_ARGS BRELOC-ARGPUSHSIZE #define SAVE_RESULTS BRELOC-8 #define TRAP_VECTOR_BASE 0xffe810d8 .data .align 4 _save_args: .skip 4*4 _save_sp: .skip 4 /* * Make sure the vector for 'trap #0' */ .globl _set_vec _set_vec: set TRAP_VECTOR_BASE, %l0 ld [%l0], %l0 set systrap, %o0 st %o0, [%l0 + 0x200] ! write new vector nop nop retl ! done, leaf routine return nop /* * System call handler. */ systrap: save %sp,-WINDOWSIZE,%sp ! This lunacy is to get around the window being lost ! in the PROM on trap.. set SAVE_ARGS, %o0 ld [%o0+0x0], %i0 ld [%o0+0x4], %i1 ld [%o0+0x8], %i2 ld [%o0+0xc], %i3 ! End of lunacy set _save_args, %o1 st %i1, [%o1+0] st %i2, [%o1+4] st %i3, [%o1+8] mov %i0, %o0 ! which syscall nop nop call _syscall ! syscall(rp) ! add %sp, MINFRAME, %o0 ! ptr to reg struct nop set SAVE_RESULTS, %o1 st %o0, [%o1] mov %o0, %i0 ret restore nop /* end syscall */
