Annotation of OpenXM_contrib2/asir2000/gc/mach_dep.c, Revision 1.1.1.1
1.1 noro 1: /*
2: * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
3: * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
4: *
5: * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
6: * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
7: *
8: * Permission is hereby granted to use or copy this program
9: * for any purpose, provided the above notices are retained on all copies.
10: * Permission to modify the code and to distribute modified code is granted,
11: * provided the above notices are retained, and a notice that the code was
12: * modified is included with the above copyright notice.
13: */
14: /* Boehm, November 17, 1995 12:13 pm PST */
15: # include "gc_priv.h"
16: # include <stdio.h>
17: # include <setjmp.h>
18: # if defined(OS2) || defined(CX_UX)
19: # define _setjmp(b) setjmp(b)
20: # define _longjmp(b,v) longjmp(b,v)
21: # endif
22: # ifdef AMIGA
23: # ifndef __GNUC__
24: # include <dos/dos.h>
25: # else
26: # include <machine/reg.h>
27: # endif
28: # endif
29:
30: #if defined(__MWERKS__) && !defined(POWERPC)
31:
32: asm static void PushMacRegisters()
33: {
34: sub.w #4,sp // reserve space for one parameter.
35: move.l a2,(sp)
36: jsr GC_push_one
37: move.l a3,(sp)
38: jsr GC_push_one
39: move.l a4,(sp)
40: jsr GC_push_one
41: # if !__option(a6frames)
42: // <pcb> perhaps a6 should be pushed if stack frames are not being used.
43: move.l a6,(sp)
44: jsr GC_push_one
45: # endif
46: // skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
47: move.l d2,(sp)
48: jsr GC_push_one
49: move.l d3,(sp)
50: jsr GC_push_one
51: move.l d4,(sp)
52: jsr GC_push_one
53: move.l d5,(sp)
54: jsr GC_push_one
55: move.l d6,(sp)
56: jsr GC_push_one
57: move.l d7,(sp)
58: jsr GC_push_one
59: add.w #4,sp // fix stack.
60: rts
61: }
62:
63: #endif /* __MWERKS__ */
64:
65: /* Routine to mark from registers that are preserved by the C compiler. */
66: /* This must be ported to every new architecture. There is a generic */
67: /* version at the end, that is likely, but not guaranteed to work */
68: /* on your architecture. Run the test_setjmp program to see whether */
69: /* there is any chance it will work. */
70:
71: #ifndef USE_GENERIC_PUSH_REGS
72: void GC_push_regs()
73: {
74: # ifdef RT
75: register long TMP_SP; /* must be bound to r11 */
76: # endif
77: # ifdef VAX
78: /* VAX - generic code below does not work under 4.2 */
79: /* r1 through r5 are caller save, and therefore */
80: /* on the stack or dead. */
81: asm("pushl r11"); asm("calls $1,_GC_push_one");
82: asm("pushl r10"); asm("calls $1,_GC_push_one");
83: asm("pushl r9"); asm("calls $1,_GC_push_one");
84: asm("pushl r8"); asm("calls $1,_GC_push_one");
85: asm("pushl r7"); asm("calls $1,_GC_push_one");
86: asm("pushl r6"); asm("calls $1,_GC_push_one");
87: # endif
88: # if defined(M68K) && (defined(SUNOS4) || defined(NEXT))
89: /* M68K SUNOS - could be replaced by generic code */
90: /* a0, a1 and d1 are caller save */
91: /* and therefore are on stack or dead. */
92:
93: asm("subqw #0x4,sp"); /* allocate word on top of stack */
94:
95: asm("movl a2,sp@"); asm("jbsr _GC_push_one");
96: asm("movl a3,sp@"); asm("jbsr _GC_push_one");
97: asm("movl a4,sp@"); asm("jbsr _GC_push_one");
98: asm("movl a5,sp@"); asm("jbsr _GC_push_one");
99: /* Skip frame pointer and stack pointer */
100: asm("movl d1,sp@"); asm("jbsr _GC_push_one");
101: asm("movl d2,sp@"); asm("jbsr _GC_push_one");
102: asm("movl d3,sp@"); asm("jbsr _GC_push_one");
103: asm("movl d4,sp@"); asm("jbsr _GC_push_one");
104: asm("movl d5,sp@"); asm("jbsr _GC_push_one");
105: asm("movl d6,sp@"); asm("jbsr _GC_push_one");
106: asm("movl d7,sp@"); asm("jbsr _GC_push_one");
107:
108: asm("addqw #0x4,sp"); /* put stack back where it was */
109: # endif
110:
111: # if defined(M68K) && defined(HP)
112: /* M68K HP - could be replaced by generic code */
113: /* a0, a1 and d1 are caller save. */
114:
115: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
116:
117: asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one");
118: asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one");
119: asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one");
120: asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one");
121: /* Skip frame pointer and stack pointer */
122: asm("mov.l %d1,(%sp)"); asm("jsr _GC_push_one");
123: asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one");
124: asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one");
125: asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one");
126: asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one");
127: asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one");
128: asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one");
129:
130: asm("addq.w &0x4,%sp"); /* put stack back where it was */
131: # endif /* M68K HP */
132:
133: # if defined(M68K) && defined(AMIGA)
134: /* AMIGA - could be replaced by generic code */
135: /* a0, a1, d0 and d1 are caller save */
136:
137: # ifdef __GNUC__
138: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
139:
140: asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one");
141: asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one");
142: asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one");
143: asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one");
144: asm("mov.l %a6,(%sp)"); asm("jsr _GC_push_one");
145: /* Skip frame pointer and stack pointer */
146: asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one");
147: asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one");
148: asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one");
149: asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one");
150: asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one");
151: asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one");
152:
153: asm("addq.w &0x4,%sp"); /* put stack back where it was */
154: # else /* !__GNUC__ */
155: GC_push_one(getreg(REG_A2));
156: GC_push_one(getreg(REG_A3));
157: GC_push_one(getreg(REG_A4));
158: GC_push_one(getreg(REG_A5));
159: GC_push_one(getreg(REG_A6));
160: /* Skip stack pointer */
161: GC_push_one(getreg(REG_D2));
162: GC_push_one(getreg(REG_D3));
163: GC_push_one(getreg(REG_D4));
164: GC_push_one(getreg(REG_D5));
165: GC_push_one(getreg(REG_D6));
166: GC_push_one(getreg(REG_D7));
167: # endif /* !__GNUC__ */
168: # endif /* AMIGA */
169:
170: # if defined(M68K) && defined(MACOS)
171: # if defined(THINK_C)
172: # define PushMacReg(reg) \
173: move.l reg,(sp) \
174: jsr GC_push_one
175: asm {
176: sub.w #4,sp ; reserve space for one parameter.
177: PushMacReg(a2);
178: PushMacReg(a3);
179: PushMacReg(a4);
180: ; skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
181: PushMacReg(d2);
182: PushMacReg(d3);
183: PushMacReg(d4);
184: PushMacReg(d5);
185: PushMacReg(d6);
186: PushMacReg(d7);
187: add.w #4,sp ; fix stack.
188: }
189: # undef PushMacReg
190: # endif /* THINK_C */
191: # if defined(__MWERKS__)
192: PushMacRegisters();
193: # endif /* __MWERKS__ */
194: # endif /* MACOS */
195:
196: # if defined(I386) &&!defined(OS2) &&!defined(SVR4) &&!defined(MSWIN32) \
197: && !defined(SCO) && !defined(SCO_ELF) \
198: && !(defined(LINUX) && defined(__ELF__)) \
199: && !(defined(__FreeBSD__) && defined(__ELF__)) \
200: && !defined(DOS4GW)
201: /* I386 code, generic code does not appear to work */
202: /* It does appear to work under OS2, and asms dont */
203: /* This is used for some 38g UNIX variants and for CYGWIN32 */
204: asm("pushl %eax"); asm("call _GC_push_one"); asm("addl $4,%esp");
205: asm("pushl %ecx"); asm("call _GC_push_one"); asm("addl $4,%esp");
206: asm("pushl %edx"); asm("call _GC_push_one"); asm("addl $4,%esp");
207: asm("pushl %ebp"); asm("call _GC_push_one"); asm("addl $4,%esp");
208: asm("pushl %esi"); asm("call _GC_push_one"); asm("addl $4,%esp");
209: asm("pushl %edi"); asm("call _GC_push_one"); asm("addl $4,%esp");
210: asm("pushl %ebx"); asm("call _GC_push_one"); asm("addl $4,%esp");
211: # endif
212:
213: # if ( defined(I386) && defined(LINUX) && defined(__ELF__) ) \
214: || ( defined(I386) && defined(__FreeBSD__) && defined(__ELF__) )
215:
216: /* This is modified for Linux with ELF (Note: _ELF_ only) */
217: /* This section handles FreeBSD with ELF. */
218: asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp");
219: asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp");
220: asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp");
221: asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp");
222: asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp");
223: asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp");
224: asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp");
225: # endif
226:
227: # if defined(I386) && defined(MSWIN32) && !defined(USE_GENERIC)
228: /* I386 code, Microsoft variant */
229: __asm push eax
230: __asm call GC_push_one
231: __asm add esp,4
232: __asm push ebx
233: __asm call GC_push_one
234: __asm add esp,4
235: __asm push ecx
236: __asm call GC_push_one
237: __asm add esp,4
238: __asm push edx
239: __asm call GC_push_one
240: __asm add esp,4
241: __asm push ebp
242: __asm call GC_push_one
243: __asm add esp,4
244: __asm push esi
245: __asm call GC_push_one
246: __asm add esp,4
247: __asm push edi
248: __asm call GC_push_one
249: __asm add esp,4
250: # endif
251:
252: # if defined(I386) && (defined(SVR4) || defined(SCO) || defined(SCO_ELF))
253: /* I386 code, SVR4 variant, generic code does not appear to work */
254: asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp");
255: asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp");
256: asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp");
257: asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp");
258: asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp");
259: asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp");
260: asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp");
261: # endif
262:
263: # ifdef NS32K
264: asm ("movd r3, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
265: asm ("movd r4, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
266: asm ("movd r5, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
267: asm ("movd r6, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
268: asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
269: # endif
270:
271: # ifdef SPARC
272: {
273: word GC_save_regs_in_stack();
274:
275: /* generic code will not work */
276: (void)GC_save_regs_in_stack();
277: }
278: # endif
279:
280: # ifdef RT
281: GC_push_one(TMP_SP); /* GC_push_one from r11 */
282:
283: asm("cas r11, r6, r0"); GC_push_one(TMP_SP); /* r6 */
284: asm("cas r11, r7, r0"); GC_push_one(TMP_SP); /* through */
285: asm("cas r11, r8, r0"); GC_push_one(TMP_SP); /* r10 */
286: asm("cas r11, r9, r0"); GC_push_one(TMP_SP);
287: asm("cas r11, r10, r0"); GC_push_one(TMP_SP);
288:
289: asm("cas r11, r12, r0"); GC_push_one(TMP_SP); /* r12 */
290: asm("cas r11, r13, r0"); GC_push_one(TMP_SP); /* through */
291: asm("cas r11, r14, r0"); GC_push_one(TMP_SP); /* r15 */
292: asm("cas r11, r15, r0"); GC_push_one(TMP_SP);
293: # endif
294:
295: # if defined(M68K) && defined(SYSV)
296: /* Once again similar to SUN and HP, though setjmp appears to work.
297: --Parag
298: */
299: # ifdef __GNUC__
300: asm("subqw #0x4,%sp"); /* allocate word on top of stack */
301:
302: asm("movl %a2,%sp@"); asm("jbsr GC_push_one");
303: asm("movl %a3,%sp@"); asm("jbsr GC_push_one");
304: asm("movl %a4,%sp@"); asm("jbsr GC_push_one");
305: asm("movl %a5,%sp@"); asm("jbsr GC_push_one");
306: /* Skip frame pointer and stack pointer */
307: asm("movl %d1,%sp@"); asm("jbsr GC_push_one");
308: asm("movl %d2,%sp@"); asm("jbsr GC_push_one");
309: asm("movl %d3,%sp@"); asm("jbsr GC_push_one");
310: asm("movl %d4,%sp@"); asm("jbsr GC_push_one");
311: asm("movl %d5,%sp@"); asm("jbsr GC_push_one");
312: asm("movl %d6,%sp@"); asm("jbsr GC_push_one");
313: asm("movl %d7,%sp@"); asm("jbsr GC_push_one");
314:
315: asm("addqw #0x4,%sp"); /* put stack back where it was */
316: # else /* !__GNUC__*/
317: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
318:
319: asm("mov.l %a2,(%sp)"); asm("jsr GC_push_one");
320: asm("mov.l %a3,(%sp)"); asm("jsr GC_push_one");
321: asm("mov.l %a4,(%sp)"); asm("jsr GC_push_one");
322: asm("mov.l %a5,(%sp)"); asm("jsr GC_push_one");
323: /* Skip frame pointer and stack pointer */
324: asm("mov.l %d1,(%sp)"); asm("jsr GC_push_one");
325: asm("mov.l %d2,(%sp)"); asm("jsr GC_push_one");
326: asm("mov.l %d3,(%sp)"); asm("jsr GC_push_one");
327: asm("mov.l %d4,(%sp)"); asm("jsr GC_push_one");
328: asm("mov.l %d5,(%sp)"); asm("jsr GC_push_one");
329: asm("mov.l %d6,(%sp)"); asm("jsr GC_push_one");
330: asm("mov.l %d7,(%sp)"); asm("jsr GC_push_one");
331:
332: asm("addq.w &0x4,%sp"); /* put stack back where it was */
333: # endif /* !__GNUC__ */
334: # endif /* M68K/SYSV */
335:
336:
337: /* other machines... */
338: # if !(defined M68K) && !(defined VAX) && !(defined RT)
339: # if !(defined SPARC) && !(defined I386) && !(defined NS32K)
340: # if !defined(POWERPC) && !defined(UTS4)
341: --> bad news <--
342: # endif
343: # endif
344: # endif
345: }
346: #endif /* !USE_GENERIC_PUSH_REGS */
347:
348: #if defined(USE_GENERIC_PUSH_REGS)
349: void GC_generic_push_regs(cold_gc_frame)
350: ptr_t cold_gc_frame;
351: {
352: /* Generic code */
353: /* The idea is due to Parag Patel at HP. */
354: /* We're not sure whether he would like */
355: /* to be he acknowledged for it or not. */
356: {
357: static jmp_buf regs;
358: register word * i = (word *) regs;
359: register ptr_t lim = (ptr_t)(regs) + (sizeof regs);
360:
361: /* Setjmp on Sun 3s doesn't clear all of the buffer. */
362: /* That tends to preserve garbage. Clear it. */
363: for (; (char *)i < lim; i++) {
364: *i = 0;
365: }
366: # if defined(POWERPC) || defined(MSWIN32) || defined(UTS4)
367: (void) setjmp(regs);
368: # else
369: (void) _setjmp(regs);
370: # endif
371: GC_push_current_stack(cold_gc_frame);
372: }
373: }
374: #endif /* USE_GENERIC_PUSH_REGS */
375:
376: /* On register window machines, we need a way to force registers into */
377: /* the stack. Return sp. */
378: # ifdef SPARC
379: asm(" .seg \"text\"");
380: # ifdef SVR4
381: asm(" .globl GC_save_regs_in_stack");
382: asm("GC_save_regs_in_stack:");
383: asm(" .type GC_save_regs_in_stack,#function");
384: # else
385: asm(" .globl _GC_save_regs_in_stack");
386: asm("_GC_save_regs_in_stack:");
387: # endif
388: asm(" ta 0x3 ! ST_FLUSH_WINDOWS");
389: asm(" mov %sp,%o0");
390: asm(" retl");
391: asm(" nop");
392: # ifdef SVR4
393: asm(" .GC_save_regs_in_stack_end:");
394: asm(" .size GC_save_regs_in_stack,.GC_save_regs_in_stack_end-GC_save_regs_in_stack");
395: # endif
396: # ifdef LINT
397: word GC_save_regs_in_stack() { return(0 /* sp really */);}
398: # endif
399: # endif
400:
401:
402: /* GC_clear_stack_inner(arg, limit) clears stack area up to limit and */
403: /* returns arg. Stack clearing is crucial on SPARC, so we supply */
404: /* an assembly version that's more careful. Assumes limit is hotter */
405: /* than sp, and limit is 8 byte aligned. */
406: #if defined(ASM_CLEAR_CODE) && !defined(THREADS)
407: #ifndef SPARC
408: --> fix it
409: #endif
410: # ifdef SUNOS4
411: asm(".globl _GC_clear_stack_inner");
412: asm("_GC_clear_stack_inner:");
413: # else
414: asm(".globl GC_clear_stack_inner");
415: asm("GC_clear_stack_inner:");
416: asm(".type GC_save_regs_in_stack,#function");
417: # endif
418: asm("mov %sp,%o2"); /* Save sp */
419: asm("add %sp,-8,%o3"); /* p = sp-8 */
420: asm("clr %g1"); /* [g0,g1] = 0 */
421: asm("add %o1,-0x60,%sp"); /* Move sp out of the way, */
422: /* so that traps still work. */
423: /* Includes some extra words */
424: /* so we can be sloppy below. */
425: asm("loop:");
426: asm("std %g0,[%o3]"); /* *(long long *)p = 0 */
427: asm("cmp %o3,%o1");
428: asm("bgu loop "); /* if (p > limit) goto loop */
429: asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */
430: asm("retl");
431: asm("mov %o2,%sp"); /* Restore sp., delay slot */
432: /* First argument = %o0 = return value */
433: # ifdef SVR4
434: asm(" .GC_clear_stack_inner_end:");
435: asm(" .size GC_clear_stack_inner,.GC_clear_stack_inner_end-GC_clear_stack_inner");
436: # endif
437:
438: # ifdef LINT
439: /*ARGSUSED*/
440: ptr_t GC_clear_stack_inner(arg, limit)
441: ptr_t arg; word limit;
442: { return(arg); }
443: # endif
444: #endif
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