Annotation of OpenXM_contrib2/asir2000/gc/mach_dep.c, Revision 1.6
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 */
1.4 noro 15: # include "private/gc_priv.h"
1.1 noro 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__
1.4 noro 24: # include <dos.h>
1.1 noro 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:
1.1 noro 84: # ifdef VAX
85: /* VAX - generic code below does not work under 4.2 */
86: /* r1 through r5 are caller save, and therefore */
87: /* on the stack or dead. */
88: asm("pushl r11"); asm("calls $1,_GC_push_one");
89: asm("pushl r10"); asm("calls $1,_GC_push_one");
90: asm("pushl r9"); asm("calls $1,_GC_push_one");
91: asm("pushl r8"); asm("calls $1,_GC_push_one");
92: asm("pushl r7"); asm("calls $1,_GC_push_one");
93: asm("pushl r6"); asm("calls $1,_GC_push_one");
94: # endif
95: # if defined(M68K) && (defined(SUNOS4) || defined(NEXT))
96: /* M68K SUNOS - could be replaced by generic code */
97: /* a0, a1 and d1 are caller save */
98: /* and therefore are on stack or dead. */
99:
100: asm("subqw #0x4,sp"); /* allocate word on top of stack */
101:
102: asm("movl a2,sp@"); asm("jbsr _GC_push_one");
103: asm("movl a3,sp@"); asm("jbsr _GC_push_one");
104: asm("movl a4,sp@"); asm("jbsr _GC_push_one");
105: asm("movl a5,sp@"); asm("jbsr _GC_push_one");
106: /* Skip frame pointer and stack pointer */
107: asm("movl d1,sp@"); asm("jbsr _GC_push_one");
108: asm("movl d2,sp@"); asm("jbsr _GC_push_one");
109: asm("movl d3,sp@"); asm("jbsr _GC_push_one");
110: asm("movl d4,sp@"); asm("jbsr _GC_push_one");
111: asm("movl d5,sp@"); asm("jbsr _GC_push_one");
112: asm("movl d6,sp@"); asm("jbsr _GC_push_one");
113: asm("movl d7,sp@"); asm("jbsr _GC_push_one");
114:
115: asm("addqw #0x4,sp"); /* put stack back where it was */
116: # endif
117:
118: # if defined(M68K) && defined(HP)
119: /* M68K HP - could be replaced by generic code */
120: /* a0, a1 and d1 are caller save. */
121:
122: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
123:
124: asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one");
125: asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one");
126: asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one");
127: asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one");
128: /* Skip frame pointer and stack pointer */
129: asm("mov.l %d1,(%sp)"); asm("jsr _GC_push_one");
130: asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one");
131: asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one");
132: asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one");
133: asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one");
134: asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one");
135: asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one");
136:
137: asm("addq.w &0x4,%sp"); /* put stack back where it was */
138: # endif /* M68K HP */
139:
140: # if defined(M68K) && defined(AMIGA)
141: /* AMIGA - could be replaced by generic code */
142: /* a0, a1, d0 and d1 are caller save */
143:
144: # ifdef __GNUC__
145: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
146:
147: asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one");
148: asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one");
149: asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one");
150: asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one");
151: asm("mov.l %a6,(%sp)"); asm("jsr _GC_push_one");
152: /* Skip frame pointer and stack pointer */
153: asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one");
154: asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one");
155: asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one");
156: asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one");
157: asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one");
158: asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one");
159:
160: asm("addq.w &0x4,%sp"); /* put stack back where it was */
161: # else /* !__GNUC__ */
162: GC_push_one(getreg(REG_A2));
163: GC_push_one(getreg(REG_A3));
1.4 noro 164: # ifndef __SASC
165: /* Can probably be changed to #if 0 -Kjetil M. (a4=globals)*/
166: GC_push_one(getreg(REG_A4));
167: # endif
1.1 noro 168: GC_push_one(getreg(REG_A5));
169: GC_push_one(getreg(REG_A6));
170: /* Skip stack pointer */
171: GC_push_one(getreg(REG_D2));
172: GC_push_one(getreg(REG_D3));
173: GC_push_one(getreg(REG_D4));
174: GC_push_one(getreg(REG_D5));
175: GC_push_one(getreg(REG_D6));
176: GC_push_one(getreg(REG_D7));
177: # endif /* !__GNUC__ */
178: # endif /* AMIGA */
179:
180: # if defined(M68K) && defined(MACOS)
181: # if defined(THINK_C)
182: # define PushMacReg(reg) \
183: move.l reg,(sp) \
184: jsr GC_push_one
185: asm {
186: sub.w #4,sp ; reserve space for one parameter.
187: PushMacReg(a2);
188: PushMacReg(a3);
189: PushMacReg(a4);
190: ; skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
191: PushMacReg(d2);
192: PushMacReg(d3);
193: PushMacReg(d4);
194: PushMacReg(d5);
195: PushMacReg(d6);
196: PushMacReg(d7);
197: add.w #4,sp ; fix stack.
198: }
199: # undef PushMacReg
200: # endif /* THINK_C */
201: # if defined(__MWERKS__)
202: PushMacRegisters();
203: # endif /* __MWERKS__ */
204: # endif /* MACOS */
205:
1.3 noro 206: # if defined(I386) &&!defined(OS2) &&!defined(SVR4) \
207: && (defined(__MINGW32__) || !defined(MSWIN32)) \
1.1 noro 208: && !defined(SCO) && !defined(SCO_ELF) \
1.4 noro 209: && !(defined(LINUX) && defined(__ELF__)) \
1.3 noro 210: && !(defined(FREEBSD) && defined(__ELF__)) \
1.4 noro 211: && !(defined(NETBSD) && defined(__ELF__)) \
212: && !(defined(OPENBSD) && defined(__ELF__)) \
213: && !(defined(BEOS) && defined(__ELF__)) \
1.6 ! noro 214: && !defined(DOS4GW) && !defined(HURD)
1.1 noro 215: /* I386 code, generic code does not appear to work */
216: /* It does appear to work under OS2, and asms dont */
217: /* This is used for some 38g UNIX variants and for CYGWIN32 */
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(LINUX) && defined(__ELF__) ) \
1.4 noro 228: || ( defined(I386) && defined(FREEBSD) && defined(__ELF__) ) \
229: || ( defined(I386) && defined(NETBSD) && defined(__ELF__) ) \
1.6 ! noro 230: || ( defined(I386) && defined(OPENBSD) && defined(__ELF__) ) \
! 231: || ( defined(I386) && defined(HURD) && defined(__ELF__) ) \
! 232: || ( defined(I386) && defined(DGUX) )
1.1 noro 233:
234: /* This is modified for Linux with ELF (Note: _ELF_ only) */
235: /* This section handles FreeBSD with ELF. */
1.3 noro 236: /* Eax is caller-save and dead here. Other caller-save */
237: /* registers could also be skipped. We assume there are no */
238: /* pointers in MMX registers, etc. */
239: /* We combine instructions in a single asm to prevent gcc from */
240: /* inserting code in the middle. */
241: asm("pushl %ecx; call GC_push_one; addl $4,%esp");
242: asm("pushl %edx; call GC_push_one; addl $4,%esp");
243: asm("pushl %ebp; call GC_push_one; addl $4,%esp");
244: asm("pushl %esi; call GC_push_one; addl $4,%esp");
245: asm("pushl %edi; call GC_push_one; addl $4,%esp");
246: asm("pushl %ebx; call GC_push_one; addl $4,%esp");
1.1 noro 247: # endif
248:
1.4 noro 249: # if ( defined(I386) && defined(BEOS) && defined(__ELF__) )
250: /* As far as I can understand from */
251: /* http://www.beunited.org/articles/jbq/nasm.shtml, */
252: /* only ebp, esi, edi and ebx are not scratch. How MMX */
253: /* etc. registers should be treated, I have no idea. */
254: asm("pushl %ebp; call GC_push_one; addl $4,%esp");
255: asm("pushl %esi; call GC_push_one; addl $4,%esp");
256: asm("pushl %edi; call GC_push_one; addl $4,%esp");
257: asm("pushl %ebx; call GC_push_one; addl $4,%esp");
258: # endif
259:
1.3 noro 260: # if defined(I386) && defined(MSWIN32) && !defined(__MINGW32__) \
261: && !defined(USE_GENERIC)
1.1 noro 262: /* I386 code, Microsoft variant */
263: __asm push eax
264: __asm call GC_push_one
265: __asm add esp,4
266: __asm push ebx
267: __asm call GC_push_one
268: __asm add esp,4
269: __asm push ecx
270: __asm call GC_push_one
271: __asm add esp,4
272: __asm push edx
273: __asm call GC_push_one
274: __asm add esp,4
275: __asm push ebp
276: __asm call GC_push_one
277: __asm add esp,4
278: __asm push esi
279: __asm call GC_push_one
280: __asm add esp,4
281: __asm push edi
282: __asm call GC_push_one
283: __asm add esp,4
284: # endif
285:
286: # if defined(I386) && (defined(SVR4) || defined(SCO) || defined(SCO_ELF))
287: /* I386 code, SVR4 variant, generic code does not appear to work */
288: asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp");
289: asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp");
290: asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp");
291: asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp");
292: asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp");
293: asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp");
294: asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp");
295: # endif
296:
297: # ifdef NS32K
298: asm ("movd r3, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
299: asm ("movd r4, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
300: asm ("movd r5, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
301: asm ("movd r6, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
302: asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
303: # endif
304:
1.3 noro 305: # if defined(SPARC)
1.1 noro 306: {
307: word GC_save_regs_in_stack();
308:
1.2 noro 309: GC_save_regs_ret_val = GC_save_regs_in_stack();
1.1 noro 310: }
311: # endif
312:
313: # ifdef RT
314: GC_push_one(TMP_SP); /* GC_push_one from r11 */
315:
316: asm("cas r11, r6, r0"); GC_push_one(TMP_SP); /* r6 */
317: asm("cas r11, r7, r0"); GC_push_one(TMP_SP); /* through */
318: asm("cas r11, r8, r0"); GC_push_one(TMP_SP); /* r10 */
319: asm("cas r11, r9, r0"); GC_push_one(TMP_SP);
320: asm("cas r11, r10, r0"); GC_push_one(TMP_SP);
321:
322: asm("cas r11, r12, r0"); GC_push_one(TMP_SP); /* r12 */
323: asm("cas r11, r13, r0"); GC_push_one(TMP_SP); /* through */
324: asm("cas r11, r14, r0"); GC_push_one(TMP_SP); /* r15 */
325: asm("cas r11, r15, r0"); GC_push_one(TMP_SP);
326: # endif
327:
328: # if defined(M68K) && defined(SYSV)
329: /* Once again similar to SUN and HP, though setjmp appears to work.
330: --Parag
331: */
332: # ifdef __GNUC__
333: asm("subqw #0x4,%sp"); /* allocate word on top of stack */
334:
335: asm("movl %a2,%sp@"); asm("jbsr GC_push_one");
336: asm("movl %a3,%sp@"); asm("jbsr GC_push_one");
337: asm("movl %a4,%sp@"); asm("jbsr GC_push_one");
338: asm("movl %a5,%sp@"); asm("jbsr GC_push_one");
339: /* Skip frame pointer and stack pointer */
340: asm("movl %d1,%sp@"); asm("jbsr GC_push_one");
341: asm("movl %d2,%sp@"); asm("jbsr GC_push_one");
342: asm("movl %d3,%sp@"); asm("jbsr GC_push_one");
343: asm("movl %d4,%sp@"); asm("jbsr GC_push_one");
344: asm("movl %d5,%sp@"); asm("jbsr GC_push_one");
345: asm("movl %d6,%sp@"); asm("jbsr GC_push_one");
346: asm("movl %d7,%sp@"); asm("jbsr GC_push_one");
347:
348: asm("addqw #0x4,%sp"); /* put stack back where it was */
349: # else /* !__GNUC__*/
350: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
351:
352: asm("mov.l %a2,(%sp)"); asm("jsr GC_push_one");
353: asm("mov.l %a3,(%sp)"); asm("jsr GC_push_one");
354: asm("mov.l %a4,(%sp)"); asm("jsr GC_push_one");
355: asm("mov.l %a5,(%sp)"); asm("jsr GC_push_one");
356: /* Skip frame pointer and stack pointer */
357: asm("mov.l %d1,(%sp)"); asm("jsr GC_push_one");
358: asm("mov.l %d2,(%sp)"); asm("jsr GC_push_one");
359: asm("mov.l %d3,(%sp)"); asm("jsr GC_push_one");
360: asm("mov.l %d4,(%sp)"); asm("jsr GC_push_one");
361: asm("mov.l %d5,(%sp)"); asm("jsr GC_push_one");
362: asm("mov.l %d6,(%sp)"); asm("jsr GC_push_one");
363: asm("mov.l %d7,(%sp)"); asm("jsr GC_push_one");
364:
365: asm("addq.w &0x4,%sp"); /* put stack back where it was */
366: # endif /* !__GNUC__ */
367: # endif /* M68K/SYSV */
368:
1.2 noro 369: # if defined(PJ)
370: {
371: register int * sp asm ("optop");
372: extern int *__libc_stack_end;
373:
374: GC_push_all_stack (sp, __libc_stack_end);
375: }
376: # endif
1.1 noro 377:
378: /* other machines... */
1.6 ! noro 379: # if !defined(M68K) && !defined(VAX) && !defined(RT)
! 380: # if !defined(SPARC) && !defined(I386) && !defined(NS32K)
1.3 noro 381: # if !defined(POWERPC) && !defined(UTS4)
382: # if !defined(PJ) && !(defined(MIPS) && defined(LINUX))
1.1 noro 383: --> bad news <--
1.2 noro 384: # endif
1.1 noro 385: # endif
386: # endif
387: # endif
388: }
389: #endif /* !USE_GENERIC_PUSH_REGS */
390:
391: #if defined(USE_GENERIC_PUSH_REGS)
392: void GC_generic_push_regs(cold_gc_frame)
393: ptr_t cold_gc_frame;
394: {
395: {
1.6 ! noro 396: # ifdef HAVE_BUILTIN_UNWIND_INIT
! 397: /* This was suggested by Richard Henderson as the way to */
! 398: /* force callee-save registers and register windows onto */
! 399: /* the stack. */
! 400: __builtin_unwind_init();
! 401: # else /* !HAVE_BUILTIN_UNWIND_INIT */
! 402: /* Generic code */
! 403: /* The idea is due to Parag Patel at HP. */
! 404: /* We're not sure whether he would like */
! 405: /* to be he acknowledged for it or not. */
! 406: jmp_buf regs;
! 407: register word * i = (word *) regs;
! 408: register ptr_t lim = (ptr_t)(regs) + (sizeof regs);
1.1 noro 409:
1.6 ! noro 410: /* Setjmp doesn't always clear all of the buffer. */
! 411: /* That tends to preserve garbage. Clear it. */
1.1 noro 412: for (; (char *)i < lim; i++) {
413: *i = 0;
414: }
1.6 ! noro 415: # if defined(POWERPC) || defined(MSWIN32) || defined(MSWINCE) \
! 416: || defined(UTS4) || defined(LINUX) || defined(EWS4800)
! 417: (void) setjmp(regs);
! 418: # else
! 419: (void) _setjmp(regs);
! 420: # endif
! 421: # endif /* !HAVE_BUILTIN_UNWIND_INIT */
! 422: # if (defined(SPARC) && !defined(HAVE_BUILTIN_UNWIND_INIT)) \
! 423: || defined(IA64)
1.3 noro 424: /* On a register window machine, we need to save register */
425: /* contents on the stack for this to work. The setjmp */
426: /* is probably not needed on SPARC, since pointers are */
427: /* only stored in windowed or scratch registers. It is */
428: /* needed on IA64, since some non-windowed registers are */
429: /* preserved. */
430: {
431: word GC_save_regs_in_stack();
432:
433: GC_save_regs_ret_val = GC_save_regs_in_stack();
1.6 ! noro 434: /* On IA64 gcc, could use __builtin_ia64_flushrs() and */
! 435: /* __builtin_ia64_flushrs(). The latter will be done */
! 436: /* implicitly by __builtin_unwind_init() for gcc3.0.1 */
! 437: /* and later. */
1.3 noro 438: }
439: # endif
1.1 noro 440: GC_push_current_stack(cold_gc_frame);
441: }
442: }
443: #endif /* USE_GENERIC_PUSH_REGS */
444:
445: /* On register window machines, we need a way to force registers into */
446: /* the stack. Return sp. */
447: # ifdef SPARC
448: asm(" .seg \"text\"");
449: # ifdef SVR4
450: asm(" .globl GC_save_regs_in_stack");
451: asm("GC_save_regs_in_stack:");
452: asm(" .type GC_save_regs_in_stack,#function");
453: # else
454: asm(" .globl _GC_save_regs_in_stack");
455: asm("_GC_save_regs_in_stack:");
456: # endif
1.4 noro 457: # if defined(__arch64__) || defined(__sparcv9)
458: asm(" save %sp,-128,%sp");
459: asm(" flushw");
460: asm(" ret");
461: asm(" restore %sp,2047+128,%o0");
462: # else
463: asm(" ta 0x3 ! ST_FLUSH_WINDOWS");
464: asm(" retl");
465: asm(" mov %sp,%o0");
466: # endif
1.1 noro 467: # ifdef SVR4
468: asm(" .GC_save_regs_in_stack_end:");
469: asm(" .size GC_save_regs_in_stack,.GC_save_regs_in_stack_end-GC_save_regs_in_stack");
470: # endif
471: # ifdef LINT
472: word GC_save_regs_in_stack() { return(0 /* sp really */);}
473: # endif
474: # endif
475:
1.2 noro 476: /* On IA64, we also need to flush register windows. But they end */
477: /* up on the other side of the stack segment. */
478: /* Returns the backing store pointer for the register stack. */
1.6 ! noro 479: /* We now implement this as a separate assembly file, since inline */
! 480: /* assembly code here doesn't work with either the Intel or HP */
! 481: /* compilers. */
! 482: # if 0
! 483: # ifdef LINUX
1.2 noro 484: asm(" .text");
485: asm(" .psr abi64");
486: asm(" .psr lsb");
487: asm(" .lsb");
488: asm("");
489: asm(" .text");
490: asm(" .align 16");
491: asm(" .global GC_save_regs_in_stack");
492: asm(" .proc GC_save_regs_in_stack");
493: asm("GC_save_regs_in_stack:");
494: asm(" .body");
495: asm(" flushrs");
496: asm(" ;;");
497: asm(" mov r8=ar.bsp");
498: asm(" br.ret.sptk.few rp");
499: asm(" .endp GC_save_regs_in_stack");
1.6 ! noro 500: # endif /* LINUX */
! 501: # if 0 /* Other alternatives that don't work on HP/UX */
! 502: word GC_save_regs_in_stack() {
! 503: # if USE_BUILTINS
! 504: __builtin_ia64_flushrs();
! 505: return __builtin_ia64_bsp();
! 506: # else
! 507: # ifdef HPUX
! 508: _asm(" flushrs");
! 509: _asm(" ;;");
! 510: _asm(" mov r8=ar.bsp");
! 511: _asm(" br.ret.sptk.few rp");
! 512: # else
! 513: asm(" flushrs");
! 514: asm(" ;;");
! 515: asm(" mov r8=ar.bsp");
! 516: asm(" br.ret.sptk.few rp");
! 517: # endif
! 518: # endif
1.4 noro 519: }
520: # endif
1.2 noro 521: # endif
1.1 noro 522:
523: /* GC_clear_stack_inner(arg, limit) clears stack area up to limit and */
524: /* returns arg. Stack clearing is crucial on SPARC, so we supply */
525: /* an assembly version that's more careful. Assumes limit is hotter */
526: /* than sp, and limit is 8 byte aligned. */
1.6 ! noro 527: #if defined(ASM_CLEAR_CODE)
1.1 noro 528: #ifndef SPARC
529: --> fix it
530: #endif
531: # ifdef SUNOS4
532: asm(".globl _GC_clear_stack_inner");
533: asm("_GC_clear_stack_inner:");
534: # else
535: asm(".globl GC_clear_stack_inner");
536: asm("GC_clear_stack_inner:");
537: asm(".type GC_save_regs_in_stack,#function");
538: # endif
1.4 noro 539: #if defined(__arch64__) || defined(__sparcv9)
540: asm("mov %sp,%o2"); /* Save sp */
541: asm("add %sp,2047-8,%o3"); /* p = sp+bias-8 */
542: asm("add %o1,-2047-192,%sp"); /* Move sp out of the way, */
543: /* so that traps still work. */
544: /* Includes some extra words */
545: /* so we can be sloppy below. */
546: asm("loop:");
547: asm("stx %g0,[%o3]"); /* *(long *)p = 0 */
548: asm("cmp %o3,%o1");
549: asm("bgu,pt %xcc, loop"); /* if (p > limit) goto loop */
550: asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */
551: asm("retl");
552: asm("mov %o2,%sp"); /* Restore sp., delay slot */
553: #else
1.1 noro 554: asm("mov %sp,%o2"); /* Save sp */
555: asm("add %sp,-8,%o3"); /* p = sp-8 */
556: asm("clr %g1"); /* [g0,g1] = 0 */
557: asm("add %o1,-0x60,%sp"); /* Move sp out of the way, */
558: /* so that traps still work. */
559: /* Includes some extra words */
560: /* so we can be sloppy below. */
561: asm("loop:");
562: asm("std %g0,[%o3]"); /* *(long long *)p = 0 */
563: asm("cmp %o3,%o1");
564: asm("bgu loop "); /* if (p > limit) goto loop */
565: asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */
566: asm("retl");
567: asm("mov %o2,%sp"); /* Restore sp., delay slot */
1.4 noro 568: #endif /* old SPARC */
1.1 noro 569: /* First argument = %o0 = return value */
570: # ifdef SVR4
571: asm(" .GC_clear_stack_inner_end:");
572: asm(" .size GC_clear_stack_inner,.GC_clear_stack_inner_end-GC_clear_stack_inner");
573: # endif
574:
575: # ifdef LINT
576: /*ARGSUSED*/
577: ptr_t GC_clear_stack_inner(arg, limit)
578: ptr_t arg; word limit;
579: { return(arg); }
580: # endif
581: #endif
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