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