412 lines
14 KiB
C
412 lines
14 KiB
C
/*
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* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
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* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
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*
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* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
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* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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*
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* Permission is hereby granted to use or copy this program
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* for any purpose, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*/
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/* Boehm, November 17, 1995 12:13 pm PST */
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# include "gc_priv.h"
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# include <stdio.h>
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# include <setjmp.h>
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# if defined(OS2) || defined(CX_UX)
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# define _setjmp(b) setjmp(b)
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# define _longjmp(b,v) longjmp(b,v)
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# endif
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# ifdef AMIGA
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# include <dos.h>
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# endif
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#if defined(__MWERKS__) && !defined(POWERPC)
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asm static void PushMacRegisters()
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{
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sub.w #4,sp // reserve space for one parameter.
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move.l a2,(sp)
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jsr GC_push_one
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move.l a3,(sp)
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jsr GC_push_one
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move.l a4,(sp)
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jsr GC_push_one
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# if !__option(a6frames)
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// <pcb> perhaps a6 should be pushed if stack frames are not being used.
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move.l a6,(sp)
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jsr GC_push_one
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# endif
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// skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
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move.l d2,(sp)
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jsr GC_push_one
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move.l d3,(sp)
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jsr GC_push_one
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move.l d4,(sp)
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jsr GC_push_one
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move.l d5,(sp)
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jsr GC_push_one
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move.l d6,(sp)
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jsr GC_push_one
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move.l d7,(sp)
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jsr GC_push_one
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add.w #4,sp // fix stack.
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rts
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}
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#endif /* __MWERKS__ */
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/* Routine to mark from registers that are preserved by the C compiler. */
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/* This must be ported to every new architecture. There is a generic */
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/* version at the end, that is likely, but not guaranteed to work */
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/* on your architecture. Run the test_setjmp program to see whether */
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/* there is any chance it will work. */
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void GC_push_regs()
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{
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# ifdef RT
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register long TMP_SP; /* must be bound to r11 */
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# endif
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# ifdef VAX
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/* VAX - generic code below does not work under 4.2 */
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/* r1 through r5 are caller save, and therefore */
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/* on the stack or dead. */
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asm("pushl r11"); asm("calls $1,_GC_push_one");
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asm("pushl r10"); asm("calls $1,_GC_push_one");
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asm("pushl r9"); asm("calls $1,_GC_push_one");
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asm("pushl r8"); asm("calls $1,_GC_push_one");
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asm("pushl r7"); asm("calls $1,_GC_push_one");
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asm("pushl r6"); asm("calls $1,_GC_push_one");
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# endif
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# if defined(M68K) && (defined(SUNOS4) || defined(NEXT))
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/* M68K SUNOS - could be replaced by generic code */
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/* a0, a1 and d1 are caller save */
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/* and therefore are on stack or dead. */
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asm("subqw #0x4,sp"); /* allocate word on top of stack */
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asm("movl a2,sp@"); asm("jbsr _GC_push_one");
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asm("movl a3,sp@"); asm("jbsr _GC_push_one");
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asm("movl a4,sp@"); asm("jbsr _GC_push_one");
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asm("movl a5,sp@"); asm("jbsr _GC_push_one");
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/* Skip frame pointer and stack pointer */
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asm("movl d1,sp@"); asm("jbsr _GC_push_one");
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asm("movl d2,sp@"); asm("jbsr _GC_push_one");
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asm("movl d3,sp@"); asm("jbsr _GC_push_one");
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asm("movl d4,sp@"); asm("jbsr _GC_push_one");
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asm("movl d5,sp@"); asm("jbsr _GC_push_one");
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asm("movl d6,sp@"); asm("jbsr _GC_push_one");
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asm("movl d7,sp@"); asm("jbsr _GC_push_one");
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asm("addqw #0x4,sp"); /* put stack back where it was */
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# endif
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# if defined(M68K) && defined(HP)
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/* M68K HP - could be replaced by generic code */
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/* a0, a1 and d1 are caller save. */
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asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
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asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one");
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asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one");
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asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one");
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asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one");
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/* Skip frame pointer and stack pointer */
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asm("mov.l %d1,(%sp)"); asm("jsr _GC_push_one");
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asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one");
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asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one");
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asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one");
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asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one");
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asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one");
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asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one");
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asm("addq.w &0x4,%sp"); /* put stack back where it was */
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# endif /* M68K HP */
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# ifdef AMIGA
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/* AMIGA - could be replaced by generic code */
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/* a0, a1, d0 and d1 are caller save */
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GC_push_one(getreg(REG_A2));
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GC_push_one(getreg(REG_A3));
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GC_push_one(getreg(REG_A4));
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GC_push_one(getreg(REG_A5));
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GC_push_one(getreg(REG_A6));
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/* Skip stack pointer */
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GC_push_one(getreg(REG_D2));
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GC_push_one(getreg(REG_D3));
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GC_push_one(getreg(REG_D4));
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GC_push_one(getreg(REG_D5));
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GC_push_one(getreg(REG_D6));
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GC_push_one(getreg(REG_D7));
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# endif
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# if defined(M68K) && defined(MACOS)
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# if defined(THINK_C)
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# define PushMacReg(reg) \
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move.l reg,(sp) \
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jsr GC_push_one
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asm {
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sub.w #4,sp ; reserve space for one parameter.
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PushMacReg(a2);
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PushMacReg(a3);
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PushMacReg(a4);
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; skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
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PushMacReg(d2);
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PushMacReg(d3);
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PushMacReg(d4);
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PushMacReg(d5);
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PushMacReg(d6);
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PushMacReg(d7);
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add.w #4,sp ; fix stack.
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}
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# undef PushMacReg
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# endif /* THINK_C */
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# if defined(__MWERKS__)
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PushMacRegisters();
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# endif /* __MWERKS__ */
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# endif /* MACOS */
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# if defined(I386) &&!defined(OS2) &&!defined(SVR4) &&!defined(MSWIN32) \
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&& !defined(SCO) && !defined(SCO_ELF) && !(defined(LINUX) \
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&& defined(__ELF__)) && !defined(DOS4GW)
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/* I386 code, generic code does not appear to work */
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/* It does appear to work under OS2, and asms dont */
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/* This is used for some 38g UNIX variants and for CYGWIN32 */
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asm("pushl %eax"); asm("call _GC_push_one"); asm("addl $4,%esp");
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asm("pushl %ecx"); asm("call _GC_push_one"); asm("addl $4,%esp");
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asm("pushl %edx"); asm("call _GC_push_one"); asm("addl $4,%esp");
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asm("pushl %ebp"); asm("call _GC_push_one"); asm("addl $4,%esp");
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asm("pushl %esi"); asm("call _GC_push_one"); asm("addl $4,%esp");
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asm("pushl %edi"); asm("call _GC_push_one"); asm("addl $4,%esp");
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asm("pushl %ebx"); asm("call _GC_push_one"); asm("addl $4,%esp");
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# endif
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# if defined(I386) && defined(LINUX) && defined(__ELF__)
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/* This is modified for Linux with ELF (Note: _ELF_ only) */
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asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp");
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asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp");
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asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp");
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asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp");
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asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp");
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asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp");
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asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp");
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# endif
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# if defined(I386) && defined(MSWIN32) && !defined(USE_GENERIC)
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/* I386 code, Microsoft variant */
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__asm push eax
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__asm call GC_push_one
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__asm add esp,4
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__asm push ebx
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__asm call GC_push_one
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__asm add esp,4
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__asm push ecx
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__asm call GC_push_one
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__asm add esp,4
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__asm push edx
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__asm call GC_push_one
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__asm add esp,4
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__asm push ebp
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__asm call GC_push_one
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__asm add esp,4
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__asm push esi
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__asm call GC_push_one
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__asm add esp,4
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__asm push edi
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__asm call GC_push_one
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__asm add esp,4
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# endif
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# if defined(I386) && (defined(SVR4) || defined(SCO) || defined(SCO_ELF))
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/* I386 code, SVR4 variant, generic code does not appear to work */
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asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp");
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asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp");
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asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp");
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asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp");
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asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp");
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asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp");
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asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp");
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# endif
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# ifdef NS32K
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asm ("movd r3, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
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asm ("movd r4, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
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asm ("movd r5, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
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asm ("movd r6, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
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asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
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# endif
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# ifdef SPARC
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{
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word GC_save_regs_in_stack();
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/* generic code will not work */
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(void)GC_save_regs_in_stack();
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}
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# endif
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# ifdef RT
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GC_push_one(TMP_SP); /* GC_push_one from r11 */
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asm("cas r11, r6, r0"); GC_push_one(TMP_SP); /* r6 */
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asm("cas r11, r7, r0"); GC_push_one(TMP_SP); /* through */
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asm("cas r11, r8, r0"); GC_push_one(TMP_SP); /* r10 */
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asm("cas r11, r9, r0"); GC_push_one(TMP_SP);
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asm("cas r11, r10, r0"); GC_push_one(TMP_SP);
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asm("cas r11, r12, r0"); GC_push_one(TMP_SP); /* r12 */
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asm("cas r11, r13, r0"); GC_push_one(TMP_SP); /* through */
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asm("cas r11, r14, r0"); GC_push_one(TMP_SP); /* r15 */
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asm("cas r11, r15, r0"); GC_push_one(TMP_SP);
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# endif
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# if defined(M68K) && defined(SYSV)
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/* Once again similar to SUN and HP, though setjmp appears to work.
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--Parag
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*/
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# ifdef __GNUC__
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asm("subqw #0x4,%sp"); /* allocate word on top of stack */
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asm("movl %a2,%sp@"); asm("jbsr GC_push_one");
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asm("movl %a3,%sp@"); asm("jbsr GC_push_one");
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asm("movl %a4,%sp@"); asm("jbsr GC_push_one");
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asm("movl %a5,%sp@"); asm("jbsr GC_push_one");
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/* Skip frame pointer and stack pointer */
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asm("movl %d1,%sp@"); asm("jbsr GC_push_one");
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asm("movl %d2,%sp@"); asm("jbsr GC_push_one");
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asm("movl %d3,%sp@"); asm("jbsr GC_push_one");
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asm("movl %d4,%sp@"); asm("jbsr GC_push_one");
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asm("movl %d5,%sp@"); asm("jbsr GC_push_one");
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asm("movl %d6,%sp@"); asm("jbsr GC_push_one");
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asm("movl %d7,%sp@"); asm("jbsr GC_push_one");
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asm("addqw #0x4,%sp"); /* put stack back where it was */
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# else /* !__GNUC__*/
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asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
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asm("mov.l %a2,(%sp)"); asm("jsr GC_push_one");
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asm("mov.l %a3,(%sp)"); asm("jsr GC_push_one");
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asm("mov.l %a4,(%sp)"); asm("jsr GC_push_one");
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asm("mov.l %a5,(%sp)"); asm("jsr GC_push_one");
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/* Skip frame pointer and stack pointer */
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asm("mov.l %d1,(%sp)"); asm("jsr GC_push_one");
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asm("mov.l %d2,(%sp)"); asm("jsr GC_push_one");
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asm("mov.l %d3,(%sp)"); asm("jsr GC_push_one");
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asm("mov.l %d4,(%sp)"); asm("jsr GC_push_one");
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asm("mov.l %d5,(%sp)"); asm("jsr GC_push_one");
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asm("mov.l %d6,(%sp)"); asm("jsr GC_push_one");
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asm("mov.l %d7,(%sp)"); asm("jsr GC_push_one");
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asm("addq.w &0x4,%sp"); /* put stack back where it was */
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# endif /* !__GNUC__ */
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# endif /* M68K/SYSV */
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# if defined(HP_PA) || defined(M88K) || defined(POWERPC) || (defined(I386) && (defined(OS2) || defined(USE_GENERIC))) || defined(UTS4)
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/* Generic code */
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/* The idea is due to Parag Patel at HP. */
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/* We're not sure whether he would like */
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/* to be he acknowledged for it or not. */
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{
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static jmp_buf regs;
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register word * i = (word *) regs;
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register ptr_t lim = (ptr_t)(regs) + (sizeof regs);
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/* Setjmp on Sun 3s doesn't clear all of the buffer. */
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/* That tends to preserve garbage. Clear it. */
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for (; (char *)i < lim; i++) {
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*i = 0;
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}
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# if defined(POWERPC) || defined(MSWIN32) || defined(UTS4)
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(void) setjmp(regs);
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# else
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(void) _setjmp(regs);
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# endif
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GC_push_all_stack((ptr_t)regs, lim);
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}
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# endif
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/* other machines... */
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# if !(defined M68K) && !(defined VAX) && !(defined RT)
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# if !(defined SPARC) && !(defined I386) && !(defined NS32K)
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# if !defined(HP_PA) && !defined(M88K) && !defined(POWERPC)
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# if !defined(UTS4)
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--> bad news <--
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# endif
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# endif
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# endif
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# endif
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}
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/* On register window machines, we need a way to force registers into */
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/* the stack. Return sp. */
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# ifdef SPARC
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asm(" .seg \"text\"");
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# ifdef SVR4
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asm(" .globl GC_save_regs_in_stack");
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asm("GC_save_regs_in_stack:");
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asm(" .type GC_save_regs_in_stack,#function");
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# else
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asm(" .globl _GC_save_regs_in_stack");
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asm("_GC_save_regs_in_stack:");
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# endif
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asm(" ta 0x3 ! ST_FLUSH_WINDOWS");
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asm(" mov %sp,%o0");
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asm(" retl");
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asm(" nop");
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# ifdef SVR4
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asm(" .GC_save_regs_in_stack_end:");
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asm(" .size GC_save_regs_in_stack,.GC_save_regs_in_stack_end-GC_save_regs_in_stack");
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# endif
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# ifdef LINT
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word GC_save_regs_in_stack() { return(0 /* sp really */);}
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# endif
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# endif
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/* GC_clear_stack_inner(arg, limit) clears stack area up to limit and */
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/* returns arg. Stack clearing is crucial on SPARC, so we supply */
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/* an assembly version that's more careful. Assumes limit is hotter */
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/* than sp, and limit is 8 byte aligned. */
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#if defined(ASM_CLEAR_CODE) && !defined(THREADS)
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#ifndef SPARC
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--> fix it
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#endif
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# ifdef SUNOS4
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asm(".globl _GC_clear_stack_inner");
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asm("_GC_clear_stack_inner:");
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# else
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asm(".globl GC_clear_stack_inner");
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asm("GC_clear_stack_inner:");
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asm(".type GC_save_regs_in_stack,#function");
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# endif
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asm("mov %sp,%o2"); /* Save sp */
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asm("add %sp,-8,%o3"); /* p = sp-8 */
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asm("clr %g1"); /* [g0,g1] = 0 */
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asm("add %o1,-0x60,%sp"); /* Move sp out of the way, */
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/* so that traps still work. */
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/* Includes some extra words */
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/* so we can be sloppy below. */
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asm("loop:");
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asm("std %g0,[%o3]"); /* *(long long *)p = 0 */
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asm("cmp %o3,%o1");
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asm("bgu loop "); /* if (p > limit) goto loop */
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asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */
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asm("retl");
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asm("mov %o2,%sp"); /* Restore sp., delay slot */
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/* First argument = %o0 = return value */
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# ifdef SVR4
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asm(" .GC_clear_stack_inner_end:");
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asm(" .size GC_clear_stack_inner,.GC_clear_stack_inner_end-GC_clear_stack_inner");
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# endif
|
|
|
|
# ifdef LINT
|
|
/*ARGSUSED*/
|
|
ptr_t GC_clear_stack_inner(arg, limit)
|
|
ptr_t arg; word limit;
|
|
{ return(arg); }
|
|
# endif
|
|
#endif
|