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-/*
- * QuickThreads -- Threads-building toolkit.
- * Copyright (c) 1993 by David Keppel
- *
- * Permission to use, copy, modify and distribute this software and
- * its documentation for any purpose and without fee is hereby
- * granted, provided that the above copyright notice and this notice
- * appear in all copies. This software is provided as a
- * proof-of-concept and for demonstration purposes; there is no
- * representation about the suitability of this software for any
- * purpose.
- */
-
- .text
-
- .globl _qt_abort
- .globl _qt_block
- .globl _qt_blocki
- .globl _qt_start
- .globl _qt_vstart
-
-
-/*
-// Calls to these routines have the signature
-//
-// void *block (func, arg1, arg2, newsp)
-//
-// Since the prologue saves 5 registers, nargs, pc, fp, ap, mask, and
-// a condition handler (at sp+0), the first argument is 40=4*10 bytes
-// offset from the stack pointer.
-*/
-_qt_block:
-_qt_blocki:
-_qt_abort:
- .word 0x7c0 /* Callee-save mask: 5 registers. */
- movl 56(sp),r1 /* Get stack pointer of new thread. */
- movl 52(sp),-(r1) /* Push arg2 */
- movl 48(sp),-(r1) /* Push arg1 */
- movl sp,-(r1) /* Push arg0 */
-
- movl 44(sp),r0 /* Get helper to call. */
- movl r1,sp /* Move to new thread's stack. */
- addl3 sp,$12,fp /* .. including the frame pointer. */
- calls $3,(r0) /* Call helper. */
-
- ret
-
-_qt_start:
- movl (sp)+,r0 /* Get `only'. */
- calls $3,(r0) /* Call `only'. */
- calls $0,_qt_error /* `only' erroniously returned. */
-
-
-_qt_vstart:
- movl (sp)+,r10 /* Get `pt'. */
- movl (sp)+,r9 /* Get `startup'. */
- movl (sp)+,r8 /* Get `vuserf'. */
- movl (sp)+,r7 /* Get `cleanup'. */
-
- pushl r10 /* Push `qt'. */
- calls $1,(r9) /* Call `startup', pop `qt' on return. */
-
- calls (sp)+,(r8) /* Call user's function. */
-
- pushl r0 /* Push `vuserf_retval'. */
- pushl r10 /* Push `qt'. */
- calls $2,(r7) /* Call `cleanup', never return. */
-
- calls $0,_qt_error /* `cleanup' erroniously returned. */