Annotation of OpenXM_contrib2/asir2000/gc/mach_dep.c, Revision 1.3
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:
1.2 noro 65: # if defined(SPARC) || defined(IA64)
66: /* Value returned from register flushing routine; either sp (SPARC) */
67: /* or ar.bsp (IA64) */
68: word GC_save_regs_ret_val;
69: # endif
70:
1.1 noro 71: /* Routine to mark from registers that are preserved by the C compiler. */
72: /* This must be ported to every new architecture. There is a generic */
73: /* version at the end, that is likely, but not guaranteed to work */
74: /* on your architecture. Run the test_setjmp program to see whether */
75: /* there is any chance it will work. */
76:
77: #ifndef USE_GENERIC_PUSH_REGS
78: void GC_push_regs()
79: {
80: # ifdef RT
81: register long TMP_SP; /* must be bound to r11 */
82: # endif
1.3 ! noro 83:
! 84: # if defined(MIPS) && defined(LINUX)
! 85: /* I'm not sure whether this has actually been tested. */
! 86: # define call_push(x) asm("move $4," x ";"); asm("jal GC_push_one")
! 87: call_push("$2");
! 88: call_push("$3");
! 89: call_push("$16");
! 90: call_push("$17");
! 91: call_push("$18");
! 92: call_push("$19");
! 93: call_push("$20");
! 94: call_push("$21");
! 95: call_push("$22");
! 96: call_push("$23");
! 97: call_push("$30");
! 98: # undef call_push
! 99: # endif /* MIPS && LINUX */
! 100:
1.1 noro 101: # ifdef VAX
102: /* VAX - generic code below does not work under 4.2 */
103: /* r1 through r5 are caller save, and therefore */
104: /* on the stack or dead. */
105: asm("pushl r11"); asm("calls $1,_GC_push_one");
106: asm("pushl r10"); asm("calls $1,_GC_push_one");
107: asm("pushl r9"); asm("calls $1,_GC_push_one");
108: asm("pushl r8"); asm("calls $1,_GC_push_one");
109: asm("pushl r7"); asm("calls $1,_GC_push_one");
110: asm("pushl r6"); asm("calls $1,_GC_push_one");
111: # endif
112: # if defined(M68K) && (defined(SUNOS4) || defined(NEXT))
113: /* M68K SUNOS - could be replaced by generic code */
114: /* a0, a1 and d1 are caller save */
115: /* and therefore are on stack or dead. */
116:
117: asm("subqw #0x4,sp"); /* allocate word on top of stack */
118:
119: asm("movl a2,sp@"); asm("jbsr _GC_push_one");
120: asm("movl a3,sp@"); asm("jbsr _GC_push_one");
121: asm("movl a4,sp@"); asm("jbsr _GC_push_one");
122: asm("movl a5,sp@"); asm("jbsr _GC_push_one");
123: /* Skip frame pointer and stack pointer */
124: asm("movl d1,sp@"); asm("jbsr _GC_push_one");
125: asm("movl d2,sp@"); asm("jbsr _GC_push_one");
126: asm("movl d3,sp@"); asm("jbsr _GC_push_one");
127: asm("movl d4,sp@"); asm("jbsr _GC_push_one");
128: asm("movl d5,sp@"); asm("jbsr _GC_push_one");
129: asm("movl d6,sp@"); asm("jbsr _GC_push_one");
130: asm("movl d7,sp@"); asm("jbsr _GC_push_one");
131:
132: asm("addqw #0x4,sp"); /* put stack back where it was */
133: # endif
134:
135: # if defined(M68K) && defined(HP)
136: /* M68K HP - could be replaced by generic code */
137: /* a0, a1 and d1 are caller save. */
138:
139: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
140:
141: asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one");
142: asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one");
143: asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one");
144: asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one");
145: /* Skip frame pointer and stack pointer */
146: asm("mov.l %d1,(%sp)"); asm("jsr _GC_push_one");
147: asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one");
148: asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one");
149: asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one");
150: asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one");
151: asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one");
152: asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one");
153:
154: asm("addq.w &0x4,%sp"); /* put stack back where it was */
155: # endif /* M68K HP */
156:
157: # if defined(M68K) && defined(AMIGA)
158: /* AMIGA - could be replaced by generic code */
159: /* a0, a1, d0 and d1 are caller save */
160:
161: # ifdef __GNUC__
162: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
163:
164: asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one");
165: asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one");
166: asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one");
167: asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one");
168: asm("mov.l %a6,(%sp)"); asm("jsr _GC_push_one");
169: /* Skip frame pointer and stack pointer */
170: asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one");
171: asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one");
172: asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one");
173: asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one");
174: asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one");
175: asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one");
176:
177: asm("addq.w &0x4,%sp"); /* put stack back where it was */
178: # else /* !__GNUC__ */
179: GC_push_one(getreg(REG_A2));
180: GC_push_one(getreg(REG_A3));
181: GC_push_one(getreg(REG_A4));
182: GC_push_one(getreg(REG_A5));
183: GC_push_one(getreg(REG_A6));
184: /* Skip stack pointer */
185: GC_push_one(getreg(REG_D2));
186: GC_push_one(getreg(REG_D3));
187: GC_push_one(getreg(REG_D4));
188: GC_push_one(getreg(REG_D5));
189: GC_push_one(getreg(REG_D6));
190: GC_push_one(getreg(REG_D7));
191: # endif /* !__GNUC__ */
192: # endif /* AMIGA */
193:
194: # if defined(M68K) && defined(MACOS)
195: # if defined(THINK_C)
196: # define PushMacReg(reg) \
197: move.l reg,(sp) \
198: jsr GC_push_one
199: asm {
200: sub.w #4,sp ; reserve space for one parameter.
201: PushMacReg(a2);
202: PushMacReg(a3);
203: PushMacReg(a4);
204: ; skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
205: PushMacReg(d2);
206: PushMacReg(d3);
207: PushMacReg(d4);
208: PushMacReg(d5);
209: PushMacReg(d6);
210: PushMacReg(d7);
211: add.w #4,sp ; fix stack.
212: }
213: # undef PushMacReg
214: # endif /* THINK_C */
215: # if defined(__MWERKS__)
216: PushMacRegisters();
217: # endif /* __MWERKS__ */
218: # endif /* MACOS */
219:
1.3 ! noro 220: # if defined(I386) &&!defined(OS2) &&!defined(SVR4) \
! 221: && (defined(__MINGW32__) || !defined(MSWIN32)) \
1.1 noro 222: && !defined(SCO) && !defined(SCO_ELF) \
223: && !(defined(LINUX) && defined(__ELF__)) \
1.3 ! noro 224: && !(defined(FREEBSD) && defined(__ELF__)) \
1.1 noro 225: && !defined(DOS4GW)
226: /* I386 code, generic code does not appear to work */
227: /* It does appear to work under OS2, and asms dont */
228: /* This is used for some 38g UNIX variants and for CYGWIN32 */
229: asm("pushl %eax"); asm("call _GC_push_one"); asm("addl $4,%esp");
230: asm("pushl %ecx"); asm("call _GC_push_one"); asm("addl $4,%esp");
231: asm("pushl %edx"); asm("call _GC_push_one"); asm("addl $4,%esp");
232: asm("pushl %ebp"); asm("call _GC_push_one"); asm("addl $4,%esp");
233: asm("pushl %esi"); asm("call _GC_push_one"); asm("addl $4,%esp");
234: asm("pushl %edi"); asm("call _GC_push_one"); asm("addl $4,%esp");
235: asm("pushl %ebx"); asm("call _GC_push_one"); asm("addl $4,%esp");
236: # endif
237:
238: # if ( defined(I386) && defined(LINUX) && defined(__ELF__) ) \
1.3 ! noro 239: || ( defined(I386) && defined(FREEBSD) && defined(__ELF__) )
1.1 noro 240:
241: /* This is modified for Linux with ELF (Note: _ELF_ only) */
242: /* This section handles FreeBSD with ELF. */
1.3 ! noro 243: /* Eax is caller-save and dead here. Other caller-save */
! 244: /* registers could also be skipped. We assume there are no */
! 245: /* pointers in MMX registers, etc. */
! 246: /* We combine instructions in a single asm to prevent gcc from */
! 247: /* inserting code in the middle. */
! 248: asm("pushl %ecx; call GC_push_one; addl $4,%esp");
! 249: asm("pushl %edx; call GC_push_one; addl $4,%esp");
! 250: asm("pushl %ebp; call GC_push_one; addl $4,%esp");
! 251: asm("pushl %esi; call GC_push_one; addl $4,%esp");
! 252: asm("pushl %edi; call GC_push_one; addl $4,%esp");
! 253: asm("pushl %ebx; call GC_push_one; addl $4,%esp");
1.1 noro 254: # endif
255:
1.3 ! noro 256: # if defined(I386) && defined(MSWIN32) && !defined(__MINGW32__) \
! 257: && !defined(USE_GENERIC)
1.1 noro 258: /* I386 code, Microsoft variant */
259: __asm push eax
260: __asm call GC_push_one
261: __asm add esp,4
262: __asm push ebx
263: __asm call GC_push_one
264: __asm add esp,4
265: __asm push ecx
266: __asm call GC_push_one
267: __asm add esp,4
268: __asm push edx
269: __asm call GC_push_one
270: __asm add esp,4
271: __asm push ebp
272: __asm call GC_push_one
273: __asm add esp,4
274: __asm push esi
275: __asm call GC_push_one
276: __asm add esp,4
277: __asm push edi
278: __asm call GC_push_one
279: __asm add esp,4
280: # endif
281:
282: # if defined(I386) && (defined(SVR4) || defined(SCO) || defined(SCO_ELF))
283: /* I386 code, SVR4 variant, generic code does not appear to work */
284: asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp");
285: asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp");
286: asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp");
287: asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp");
288: asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp");
289: asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp");
290: asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp");
291: # endif
292:
293: # ifdef NS32K
294: asm ("movd r3, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
295: asm ("movd r4, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
296: asm ("movd r5, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
297: asm ("movd r6, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
298: asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
299: # endif
300:
1.3 ! noro 301: # if defined(SPARC)
1.1 noro 302: {
303: word GC_save_regs_in_stack();
304:
1.2 noro 305: GC_save_regs_ret_val = GC_save_regs_in_stack();
1.1 noro 306: }
307: # endif
308:
309: # ifdef RT
310: GC_push_one(TMP_SP); /* GC_push_one from r11 */
311:
312: asm("cas r11, r6, r0"); GC_push_one(TMP_SP); /* r6 */
313: asm("cas r11, r7, r0"); GC_push_one(TMP_SP); /* through */
314: asm("cas r11, r8, r0"); GC_push_one(TMP_SP); /* r10 */
315: asm("cas r11, r9, r0"); GC_push_one(TMP_SP);
316: asm("cas r11, r10, r0"); GC_push_one(TMP_SP);
317:
318: asm("cas r11, r12, r0"); GC_push_one(TMP_SP); /* r12 */
319: asm("cas r11, r13, r0"); GC_push_one(TMP_SP); /* through */
320: asm("cas r11, r14, r0"); GC_push_one(TMP_SP); /* r15 */
321: asm("cas r11, r15, r0"); GC_push_one(TMP_SP);
322: # endif
323:
324: # if defined(M68K) && defined(SYSV)
325: /* Once again similar to SUN and HP, though setjmp appears to work.
326: --Parag
327: */
328: # ifdef __GNUC__
329: asm("subqw #0x4,%sp"); /* allocate word on top of stack */
330:
331: asm("movl %a2,%sp@"); asm("jbsr GC_push_one");
332: asm("movl %a3,%sp@"); asm("jbsr GC_push_one");
333: asm("movl %a4,%sp@"); asm("jbsr GC_push_one");
334: asm("movl %a5,%sp@"); asm("jbsr GC_push_one");
335: /* Skip frame pointer and stack pointer */
336: asm("movl %d1,%sp@"); asm("jbsr GC_push_one");
337: asm("movl %d2,%sp@"); asm("jbsr GC_push_one");
338: asm("movl %d3,%sp@"); asm("jbsr GC_push_one");
339: asm("movl %d4,%sp@"); asm("jbsr GC_push_one");
340: asm("movl %d5,%sp@"); asm("jbsr GC_push_one");
341: asm("movl %d6,%sp@"); asm("jbsr GC_push_one");
342: asm("movl %d7,%sp@"); asm("jbsr GC_push_one");
343:
344: asm("addqw #0x4,%sp"); /* put stack back where it was */
345: # else /* !__GNUC__*/
346: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
347:
348: asm("mov.l %a2,(%sp)"); asm("jsr GC_push_one");
349: asm("mov.l %a3,(%sp)"); asm("jsr GC_push_one");
350: asm("mov.l %a4,(%sp)"); asm("jsr GC_push_one");
351: asm("mov.l %a5,(%sp)"); asm("jsr GC_push_one");
352: /* Skip frame pointer and stack pointer */
353: asm("mov.l %d1,(%sp)"); asm("jsr GC_push_one");
354: asm("mov.l %d2,(%sp)"); asm("jsr GC_push_one");
355: asm("mov.l %d3,(%sp)"); asm("jsr GC_push_one");
356: asm("mov.l %d4,(%sp)"); asm("jsr GC_push_one");
357: asm("mov.l %d5,(%sp)"); asm("jsr GC_push_one");
358: asm("mov.l %d6,(%sp)"); asm("jsr GC_push_one");
359: asm("mov.l %d7,(%sp)"); asm("jsr GC_push_one");
360:
361: asm("addq.w &0x4,%sp"); /* put stack back where it was */
362: # endif /* !__GNUC__ */
363: # endif /* M68K/SYSV */
364:
1.2 noro 365: # if defined(PJ)
366: {
367: register int * sp asm ("optop");
368: extern int *__libc_stack_end;
369:
370: GC_push_all_stack (sp, __libc_stack_end);
371: }
372: # endif
1.1 noro 373:
374: /* other machines... */
375: # if !(defined M68K) && !(defined VAX) && !(defined RT)
376: # if !(defined SPARC) && !(defined I386) && !(defined NS32K)
1.3 ! noro 377: # if !defined(POWERPC) && !defined(UTS4)
! 378: # if !defined(PJ) && !(defined(MIPS) && defined(LINUX))
1.1 noro 379: --> bad news <--
1.2 noro 380: # endif
1.1 noro 381: # endif
382: # endif
383: # endif
384: }
385: #endif /* !USE_GENERIC_PUSH_REGS */
386:
387: #if defined(USE_GENERIC_PUSH_REGS)
388: void GC_generic_push_regs(cold_gc_frame)
389: ptr_t cold_gc_frame;
390: {
391: /* Generic code */
392: /* The idea is due to Parag Patel at HP. */
393: /* We're not sure whether he would like */
394: /* to be he acknowledged for it or not. */
395: {
396: static jmp_buf regs;
397: register word * i = (word *) regs;
398: register ptr_t lim = (ptr_t)(regs) + (sizeof regs);
399:
400: /* Setjmp on Sun 3s doesn't clear all of the buffer. */
401: /* That tends to preserve garbage. Clear it. */
402: for (; (char *)i < lim; i++) {
403: *i = 0;
404: }
1.3 ! noro 405: # if defined(POWERPC) || defined(MSWIN32) || defined(UTS4) || defined(LINUX)
1.1 noro 406: (void) setjmp(regs);
407: # else
408: (void) _setjmp(regs);
409: # endif
1.3 ! noro 410: # if defined(SPARC) || defined(IA64)
! 411: /* On a register window machine, we need to save register */
! 412: /* contents on the stack for this to work. The setjmp */
! 413: /* is probably not needed on SPARC, since pointers are */
! 414: /* only stored in windowed or scratch registers. It is */
! 415: /* needed on IA64, since some non-windowed registers are */
! 416: /* preserved. */
! 417: {
! 418: word GC_save_regs_in_stack();
! 419:
! 420: GC_save_regs_ret_val = GC_save_regs_in_stack();
! 421: }
! 422: # endif
1.1 noro 423: GC_push_current_stack(cold_gc_frame);
424: }
425: }
426: #endif /* USE_GENERIC_PUSH_REGS */
427:
428: /* On register window machines, we need a way to force registers into */
429: /* the stack. Return sp. */
430: # ifdef SPARC
431: asm(" .seg \"text\"");
432: # ifdef SVR4
433: asm(" .globl GC_save_regs_in_stack");
434: asm("GC_save_regs_in_stack:");
435: asm(" .type GC_save_regs_in_stack,#function");
436: # else
437: asm(" .globl _GC_save_regs_in_stack");
438: asm("_GC_save_regs_in_stack:");
439: # endif
440: asm(" ta 0x3 ! ST_FLUSH_WINDOWS");
441: asm(" mov %sp,%o0");
442: asm(" retl");
443: asm(" nop");
444: # ifdef SVR4
445: asm(" .GC_save_regs_in_stack_end:");
446: asm(" .size GC_save_regs_in_stack,.GC_save_regs_in_stack_end-GC_save_regs_in_stack");
447: # endif
448: # ifdef LINT
449: word GC_save_regs_in_stack() { return(0 /* sp really */);}
450: # endif
451: # endif
452:
1.2 noro 453: /* On IA64, we also need to flush register windows. But they end */
454: /* up on the other side of the stack segment. */
455: /* Returns the backing store pointer for the register stack. */
456: # ifdef IA64
457: asm(" .text");
458: asm(" .psr abi64");
459: asm(" .psr lsb");
460: asm(" .lsb");
461: asm("");
462: asm(" .text");
463: asm(" .align 16");
464: asm(" .global GC_save_regs_in_stack");
465: asm(" .proc GC_save_regs_in_stack");
466: asm("GC_save_regs_in_stack:");
467: asm(" .body");
468: asm(" flushrs");
469: asm(" ;;");
470: asm(" mov r8=ar.bsp");
471: asm(" br.ret.sptk.few rp");
472: asm(" .endp GC_save_regs_in_stack");
473: # endif
1.1 noro 474:
475: /* GC_clear_stack_inner(arg, limit) clears stack area up to limit and */
476: /* returns arg. Stack clearing is crucial on SPARC, so we supply */
477: /* an assembly version that's more careful. Assumes limit is hotter */
478: /* than sp, and limit is 8 byte aligned. */
479: #if defined(ASM_CLEAR_CODE) && !defined(THREADS)
480: #ifndef SPARC
481: --> fix it
482: #endif
483: # ifdef SUNOS4
484: asm(".globl _GC_clear_stack_inner");
485: asm("_GC_clear_stack_inner:");
486: # else
487: asm(".globl GC_clear_stack_inner");
488: asm("GC_clear_stack_inner:");
489: asm(".type GC_save_regs_in_stack,#function");
490: # endif
491: asm("mov %sp,%o2"); /* Save sp */
492: asm("add %sp,-8,%o3"); /* p = sp-8 */
493: asm("clr %g1"); /* [g0,g1] = 0 */
494: asm("add %o1,-0x60,%sp"); /* Move sp out of the way, */
495: /* so that traps still work. */
496: /* Includes some extra words */
497: /* so we can be sloppy below. */
498: asm("loop:");
499: asm("std %g0,[%o3]"); /* *(long long *)p = 0 */
500: asm("cmp %o3,%o1");
501: asm("bgu loop "); /* if (p > limit) goto loop */
502: asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */
503: asm("retl");
504: asm("mov %o2,%sp"); /* Restore sp., delay slot */
505: /* First argument = %o0 = return value */
506: # ifdef SVR4
507: asm(" .GC_clear_stack_inner_end:");
508: asm(" .size GC_clear_stack_inner,.GC_clear_stack_inner_end-GC_clear_stack_inner");
509: # endif
510:
511: # ifdef LINT
512: /*ARGSUSED*/
513: ptr_t GC_clear_stack_inner(arg, limit)
514: ptr_t arg; word limit;
515: { return(arg); }
516: # endif
517: #endif
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