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- /*
- * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
- * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
- *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
- *
- * Permission is hereby granted to use or copy this program
- * for any purpose, provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
- */
- /* Boehm, December 12, 1994 5:03 pm PST */
- # include "gc_priv.h"
- # include <stdio.h>
- # include <setjmp.h>
- # if defined(OS2) || defined(CX_UX)
- # define _setjmp(b) setjmp(b)
- # define _longjmp(b,v) longjmp(b,v)
- # endif
- # ifdef AMIGA
- # include <dos.h>
- # endif
-
- #if defined(__MWERKS__) && !defined(POWERPC)
-
- asm static void PushMacRegisters()
- {
- sub.w #4,sp // reserve space for one parameter.
- move.l a2,(sp)
- jsr GC_push_one
- move.l a3,(sp)
- jsr GC_push_one
- move.l a4,(sp)
- jsr GC_push_one
- // skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
- move.l d2,(sp)
- jsr GC_push_one
- move.l d3,(sp)
- jsr GC_push_one
- move.l d4,(sp)
- jsr GC_push_one
- move.l d5,(sp)
- jsr GC_push_one
- move.l d6,(sp)
- jsr GC_push_one
- move.l d7,(sp)
- jsr GC_push_one
- add.w #4,sp // fix stack.
- rts
- }
-
- #endif /* __MWERKS__ */
-
- /* Routine to mark from registers that are preserved by the C compiler. */
- /* This must be ported to every new architecture. There is a generic */
- /* version at the end, that is likely, but not guaranteed to work */
- /* on your architecture. Run the test_setjmp program to see whether */
- /* there is any chance it will work. */
-
- void GC_push_regs()
- {
- # ifdef RT
- register long TMP_SP; /* must be bound to r11 */
- # endif
- # ifdef VAX
- /* VAX - generic code below does not work under 4.2 */
- /* r1 through r5 are caller save, and therefore */
- /* on the stack or dead. */
- asm("pushl r11"); asm("calls $1,_GC_push_one");
- asm("pushl r10"); asm("calls $1,_GC_push_one");
- asm("pushl r9"); asm("calls $1,_GC_push_one");
- asm("pushl r8"); asm("calls $1,_GC_push_one");
- asm("pushl r7"); asm("calls $1,_GC_push_one");
- asm("pushl r6"); asm("calls $1,_GC_push_one");
- # endif
- # if defined(M68K) && (defined(SUNOS4) || defined(NEXT))
- /* M68K SUNOS - could be replaced by generic code */
- /* a0, a1 and d1 are caller save */
- /* and therefore are on stack or dead. */
-
- asm("subqw #0x4,sp"); /* allocate word on top of stack */
-
- asm("movl a2,sp@"); asm("jbsr _GC_push_one");
- asm("movl a3,sp@"); asm("jbsr _GC_push_one");
- asm("movl a4,sp@"); asm("jbsr _GC_push_one");
- asm("movl a5,sp@"); asm("jbsr _GC_push_one");
- /* Skip frame pointer and stack pointer */
- asm("movl d1,sp@"); asm("jbsr _GC_push_one");
- asm("movl d2,sp@"); asm("jbsr _GC_push_one");
- asm("movl d3,sp@"); asm("jbsr _GC_push_one");
- asm("movl d4,sp@"); asm("jbsr _GC_push_one");
- asm("movl d5,sp@"); asm("jbsr _GC_push_one");
- asm("movl d6,sp@"); asm("jbsr _GC_push_one");
- asm("movl d7,sp@"); asm("jbsr _GC_push_one");
-
- asm("addqw #0x4,sp"); /* put stack back where it was */
- # endif
-
- # if defined(M68K) && defined(HP)
- /* M68K HP - could be replaced by generic code */
- /* a0, a1 and d1 are caller save. */
-
- asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
-
- asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one");
- asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one");
- asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one");
- asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one");
- /* Skip frame pointer and stack pointer */
- asm("mov.l %d1,(%sp)"); asm("jsr _GC_push_one");
- asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one");
- asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one");
- asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one");
- asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one");
- asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one");
- asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one");
-
- asm("addq.w &0x4,%sp"); /* put stack back where it was */
- # endif /* M68K HP */
-
- # ifdef AMIGA
- /* AMIGA - could be replaced by generic code */
- /* a0, a1, d0 and d1 are caller save */
- GC_push_one(getreg(REG_A2));
- GC_push_one(getreg(REG_A3));
- GC_push_one(getreg(REG_A4));
- GC_push_one(getreg(REG_A5));
- GC_push_one(getreg(REG_A6));
- /* Skip stack pointer */
- GC_push_one(getreg(REG_D2));
- GC_push_one(getreg(REG_D3));
- GC_push_one(getreg(REG_D4));
- GC_push_one(getreg(REG_D5));
- GC_push_one(getreg(REG_D6));
- GC_push_one(getreg(REG_D7));
- # endif
-
- # if defined(M68K) && defined(MACOS)
- # if defined(THINK_C)
- # define PushMacReg(reg) \
- move.l reg,(sp) \
- jsr GC_push_one
- asm {
- sub.w #4,sp ; reserve space for one parameter.
- PushMacReg(a2);
- PushMacReg(a3);
- PushMacReg(a4);
- ; skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
- PushMacReg(d2);
- PushMacReg(d3);
- PushMacReg(d4);
- PushMacReg(d5);
- PushMacReg(d6);
- PushMacReg(d7);
- add.w #4,sp ; fix stack.
- }
- # undef PushMacReg
- # endif /* THINK_C */
- # if defined(__MWERKS__)
- PushMacRegisters();
- # endif /* __MWERKS__ */
- # endif /* MACOS */
-
- # if defined(I386) &&!defined(OS2) &&!defined(SVR4) &&!defined(MSWIN32) && !defined(SCO)
- /* I386 code, generic code does not appear to work */
- /* It does appear to work under OS2, and asms dont */
- asm("pushl %eax"); asm("call _GC_push_one"); asm("addl $4,%esp");
- asm("pushl %ecx"); asm("call _GC_push_one"); asm("addl $4,%esp");
- asm("pushl %edx"); asm("call _GC_push_one"); asm("addl $4,%esp");
- asm("pushl %esi"); asm("call _GC_push_one"); asm("addl $4,%esp");
- asm("pushl %edi"); asm("call _GC_push_one"); asm("addl $4,%esp");
- asm("pushl %ebx"); asm("call _GC_push_one"); asm("addl $4,%esp");
- # endif
-
- # if defined(I386) && defined(MSWIN32)
- /* I386 code, Microsoft variant */
- __asm push eax
- __asm call GC_push_one
- __asm add esp,4
- __asm push ebx
- __asm call GC_push_one
- __asm add esp,4
- __asm push ecx
- __asm call GC_push_one
- __asm add esp,4
- __asm push edx
- __asm call GC_push_one
- __asm add esp,4
- __asm push ebp
- __asm call GC_push_one
- __asm add esp,4
- __asm push esi
- __asm call GC_push_one
- __asm add esp,4
- __asm push edi
- __asm call GC_push_one
- __asm add esp,4
- # endif
-
- # if defined(I386) && (defined(SVR4) || defined(SCO))
- /* I386 code, SVR4 variant, generic code does not appear to work */
- asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp");
- asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp");
- asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp");
- asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp");
- asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp");
- asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp");
- asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp");
- # endif
-
- # ifdef NS32K
- asm ("movd r3, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
- asm ("movd r4, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
- asm ("movd r5, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
- asm ("movd r6, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
- asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
- # endif
-
- # ifdef SPARC
- {
- word GC_save_regs_in_stack();
-
- /* generic code will not work */
- (void)GC_save_regs_in_stack();
- }
- # endif
-
- # ifdef RT
- GC_push_one(TMP_SP); /* GC_push_one from r11 */
-
- asm("cas r11, r6, r0"); GC_push_one(TMP_SP); /* r6 */
- asm("cas r11, r7, r0"); GC_push_one(TMP_SP); /* through */
- asm("cas r11, r8, r0"); GC_push_one(TMP_SP); /* r10 */
- asm("cas r11, r9, r0"); GC_push_one(TMP_SP);
- asm("cas r11, r10, r0"); GC_push_one(TMP_SP);
-
- asm("cas r11, r12, r0"); GC_push_one(TMP_SP); /* r12 */
- asm("cas r11, r13, r0"); GC_push_one(TMP_SP); /* through */
- asm("cas r11, r14, r0"); GC_push_one(TMP_SP); /* r15 */
- asm("cas r11, r15, r0"); GC_push_one(TMP_SP);
- # endif
-
- # if defined(M68K) && defined(SYSV)
- /* Once again similar to SUN and HP, though setjmp appears to work.
- --Parag
- */
- # ifdef __GNUC__
- asm("subqw #0x4,%sp"); /* allocate word on top of stack */
-
- asm("movl %a2,%sp@"); asm("jbsr GC_push_one");
- asm("movl %a3,%sp@"); asm("jbsr GC_push_one");
- asm("movl %a4,%sp@"); asm("jbsr GC_push_one");
- asm("movl %a5,%sp@"); asm("jbsr GC_push_one");
- /* Skip frame pointer and stack pointer */
- asm("movl %d1,%sp@"); asm("jbsr GC_push_one");
- asm("movl %d2,%sp@"); asm("jbsr GC_push_one");
- asm("movl %d3,%sp@"); asm("jbsr GC_push_one");
- asm("movl %d4,%sp@"); asm("jbsr GC_push_one");
- asm("movl %d5,%sp@"); asm("jbsr GC_push_one");
- asm("movl %d6,%sp@"); asm("jbsr GC_push_one");
- asm("movl %d7,%sp@"); asm("jbsr GC_push_one");
-
- asm("addqw #0x4,%sp"); /* put stack back where it was */
- # else /* !__GNUC__*/
- asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
-
- asm("mov.l %a2,(%sp)"); asm("jsr GC_push_one");
- asm("mov.l %a3,(%sp)"); asm("jsr GC_push_one");
- asm("mov.l %a4,(%sp)"); asm("jsr GC_push_one");
- asm("mov.l %a5,(%sp)"); asm("jsr GC_push_one");
- /* Skip frame pointer and stack pointer */
- asm("mov.l %d1,(%sp)"); asm("jsr GC_push_one");
- asm("mov.l %d2,(%sp)"); asm("jsr GC_push_one");
- asm("mov.l %d3,(%sp)"); asm("jsr GC_push_one");
- asm("mov.l %d4,(%sp)"); asm("jsr GC_push_one");
- asm("mov.l %d5,(%sp)"); asm("jsr GC_push_one");
- asm("mov.l %d6,(%sp)"); asm("jsr GC_push_one");
- asm("mov.l %d7,(%sp)"); asm("jsr GC_push_one");
-
- asm("addq.w &0x4,%sp"); /* put stack back where it was */
- # endif /* !__GNUC__ */
- # endif /* M68K/SYSV */
-
-
- # if defined(HP_PA) || defined(M88K) || defined(POWERPC) || (defined(I386) && defined(OS2))
- /* Generic code */
- /* The idea is due to Parag Patel at HP. */
- /* We're not sure whether he would like */
- /* to be he acknowledged for it or not. */
- {
- static jmp_buf regs;
- register word * i = (word *) regs;
- register ptr_t lim = (ptr_t)(regs) + (sizeof regs);
-
- /* Setjmp on Sun 3s doesn't clear all of the buffer. */
- /* That tends to preserve garbage. Clear it. */
- for (; (char *)i < lim; i++) {
- *i = 0;
- }
- # ifdef POWERPC
- (void) setjmp(regs);
- # else
- (void) _setjmp(regs);
- # endif
- GC_push_all_stack((ptr_t)regs, lim);
- }
- # endif
-
- /* other machines... */
- # if !(defined M68K) && !(defined VAX) && !(defined RT)
- # if !(defined SPARC) && !(defined I386) && !(defined NS32K)
- # if !defined(HP_PA) && !defined(M88K) && !defined(POWERPC)
- --> bad news <--
- # endif
- # endif
- # endif
- }
-
- /* On register window machines, we need a way to force registers into */
- /* the stack. Return sp. */
- # ifdef SPARC
- asm(" .seg \"text\"");
- # ifdef SVR4
- asm(" .globl GC_save_regs_in_stack");
- asm("GC_save_regs_in_stack:");
- asm(" .type GC_save_regs_in_stack,#function");
- # else
- asm(" .globl _GC_save_regs_in_stack");
- asm("_GC_save_regs_in_stack:");
- # endif
- asm(" ta 0x3 ! ST_FLUSH_WINDOWS");
- asm(" mov %sp,%o0");
- asm(" retl");
- asm(" nop");
- # ifdef SVR4
- asm(" .GC_save_regs_in_stack_end:");
- asm(" .size GC_save_regs_in_stack,.GC_save_regs_in_stack_end-GC_save_regs_in_stack");
- # endif
- # ifdef LINT
- word GC_save_regs_in_stack() { return(0 /* sp really */);}
- # endif
- # endif
-
-
- /* GC_clear_stack_inner(arg, limit) clears stack area up to limit and */
- /* returns arg. Stack clearing is crucial on SPARC, so we supply */
- /* an assembly version that's more careful. Assumes limit is hotter */
- /* than sp, and limit is 8 byte aligned. */
- #if defined(ASM_CLEAR_CODE) && !defined(THREADS)
- #ifndef SPARC
- --> fix it
- #endif
- # ifdef SUNOS4
- asm(".globl _GC_clear_stack_inner");
- asm("_GC_clear_stack_inner:");
- # else
- asm(".globl GC_clear_stack_inner");
- asm("GC_clear_stack_inner:");
- asm(".type GC_save_regs_in_stack,#function");
- # endif
- asm("mov %sp,%o2"); /* Save sp */
- asm("add %sp,-8,%o3"); /* p = sp-8 */
- asm("clr %g1"); /* [g0,g1] = 0 */
- asm("add %o1,-0x60,%sp"); /* Move sp out of the way, */
- /* so that traps still work. */
- /* Includes some extra words */
- /* so we can be sloppy below. */
- asm("loop:");
- asm("std %g0,[%o3]"); /* *(long long *)p = 0 */
- asm("cmp %o3,%o1");
- asm("bgu loop "); /* if (p > limit) goto loop */
- asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */
- asm("retl");
- asm("mov %o2,%sp"); /* Restore sp., delay slot */
- /* First argument = %o0 = return value */
- # ifdef SVR4
- asm(" .GC_clear_stack_inner_end:");
- asm(" .size GC_clear_stack_inner,.GC_clear_stack_inner_end-GC_clear_stack_inner");
- # endif
-
- # ifdef LINT
- /*ARGSUSED*/
- ptr_t GC_clear_stack_inner(arg, limit)
- ptr_t arg; word limit;
- { return(arg); }
- # endif
- #endif
-