Annotation of OpenXM_contrib2/asir2000/gc/mach_dep.c, Revision 1.7
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:
1.7 ! noro 77: #if !defined(USE_GENERIC_PUSH_REGS) && !defined(USE_ASM_PUSH_REGS)
! 78: #undef HAVE_PUSH_REGS
1.1 noro 79: void GC_push_regs()
80: {
81: # ifdef RT
82: register long TMP_SP; /* must be bound to r11 */
83: # endif
1.3 noro 84:
1.1 noro 85: # ifdef VAX
86: /* VAX - generic code below does not work under 4.2 */
87: /* r1 through r5 are caller save, and therefore */
88: /* on the stack or dead. */
89: asm("pushl r11"); asm("calls $1,_GC_push_one");
90: asm("pushl r10"); asm("calls $1,_GC_push_one");
91: asm("pushl r9"); asm("calls $1,_GC_push_one");
92: asm("pushl r8"); asm("calls $1,_GC_push_one");
93: asm("pushl r7"); asm("calls $1,_GC_push_one");
94: asm("pushl r6"); asm("calls $1,_GC_push_one");
1.7 ! noro 95: # define HAVE_PUSH_REGS
1.1 noro 96: # endif
97: # if defined(M68K) && (defined(SUNOS4) || defined(NEXT))
98: /* M68K SUNOS - could be replaced by generic code */
99: /* a0, a1 and d1 are caller save */
100: /* and therefore are on stack or dead. */
101:
102: asm("subqw #0x4,sp"); /* allocate word on top of stack */
103:
104: asm("movl a2,sp@"); asm("jbsr _GC_push_one");
105: asm("movl a3,sp@"); asm("jbsr _GC_push_one");
106: asm("movl a4,sp@"); asm("jbsr _GC_push_one");
107: asm("movl a5,sp@"); asm("jbsr _GC_push_one");
108: /* Skip frame pointer and stack pointer */
109: asm("movl d1,sp@"); asm("jbsr _GC_push_one");
110: asm("movl d2,sp@"); asm("jbsr _GC_push_one");
111: asm("movl d3,sp@"); asm("jbsr _GC_push_one");
112: asm("movl d4,sp@"); asm("jbsr _GC_push_one");
113: asm("movl d5,sp@"); asm("jbsr _GC_push_one");
114: asm("movl d6,sp@"); asm("jbsr _GC_push_one");
115: asm("movl d7,sp@"); asm("jbsr _GC_push_one");
116:
117: asm("addqw #0x4,sp"); /* put stack back where it was */
1.7 ! noro 118: # define HAVE_PUSH_REGS
1.1 noro 119: # endif
120:
121: # if defined(M68K) && defined(HP)
122: /* M68K HP - could be replaced by generic code */
123: /* a0, a1 and d1 are caller save. */
124:
125: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
126:
127: asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one");
128: asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one");
129: asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one");
130: asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one");
131: /* Skip frame pointer and stack pointer */
132: asm("mov.l %d1,(%sp)"); asm("jsr _GC_push_one");
133: asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one");
134: asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one");
135: asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one");
136: asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one");
137: asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one");
138: asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one");
139:
140: asm("addq.w &0x4,%sp"); /* put stack back where it was */
1.7 ! noro 141: # define HAVE_PUSH_REGS
1.1 noro 142: # endif /* M68K HP */
143:
144: # if defined(M68K) && defined(AMIGA)
145: /* AMIGA - could be replaced by generic code */
146: /* a0, a1, d0 and d1 are caller save */
147:
148: # ifdef __GNUC__
149: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
150:
151: asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one");
152: asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one");
153: asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one");
154: asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one");
155: asm("mov.l %a6,(%sp)"); asm("jsr _GC_push_one");
156: /* Skip frame pointer and stack pointer */
157: asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one");
158: asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one");
159: asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one");
160: asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one");
161: asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one");
162: asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one");
163:
164: asm("addq.w &0x4,%sp"); /* put stack back where it was */
1.7 ! noro 165: # define HAVE_PUSH_REGS
1.1 noro 166: # else /* !__GNUC__ */
167: GC_push_one(getreg(REG_A2));
168: GC_push_one(getreg(REG_A3));
1.4 noro 169: # ifndef __SASC
170: /* Can probably be changed to #if 0 -Kjetil M. (a4=globals)*/
171: GC_push_one(getreg(REG_A4));
172: # endif
1.1 noro 173: GC_push_one(getreg(REG_A5));
174: GC_push_one(getreg(REG_A6));
175: /* Skip stack pointer */
176: GC_push_one(getreg(REG_D2));
177: GC_push_one(getreg(REG_D3));
178: GC_push_one(getreg(REG_D4));
179: GC_push_one(getreg(REG_D5));
180: GC_push_one(getreg(REG_D6));
181: GC_push_one(getreg(REG_D7));
1.7 ! noro 182: # define HAVE_PUSH_REGS
1.1 noro 183: # endif /* !__GNUC__ */
184: # endif /* AMIGA */
185:
186: # if defined(M68K) && defined(MACOS)
187: # if defined(THINK_C)
188: # define PushMacReg(reg) \
189: move.l reg,(sp) \
190: jsr GC_push_one
191: asm {
192: sub.w #4,sp ; reserve space for one parameter.
193: PushMacReg(a2);
194: PushMacReg(a3);
195: PushMacReg(a4);
196: ; skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
197: PushMacReg(d2);
198: PushMacReg(d3);
199: PushMacReg(d4);
200: PushMacReg(d5);
201: PushMacReg(d6);
202: PushMacReg(d7);
203: add.w #4,sp ; fix stack.
204: }
1.7 ! noro 205: # define HAVE_PUSH_REGS
1.1 noro 206: # undef PushMacReg
207: # endif /* THINK_C */
208: # if defined(__MWERKS__)
209: PushMacRegisters();
1.7 ! noro 210: # define HAVE_PUSH_REGS
1.1 noro 211: # endif /* __MWERKS__ */
212: # endif /* MACOS */
213:
1.3 noro 214: # if defined(I386) &&!defined(OS2) &&!defined(SVR4) \
215: && (defined(__MINGW32__) || !defined(MSWIN32)) \
1.1 noro 216: && !defined(SCO) && !defined(SCO_ELF) \
1.4 noro 217: && !(defined(LINUX) && defined(__ELF__)) \
1.3 noro 218: && !(defined(FREEBSD) && defined(__ELF__)) \
1.4 noro 219: && !(defined(NETBSD) && defined(__ELF__)) \
220: && !(defined(OPENBSD) && defined(__ELF__)) \
221: && !(defined(BEOS) && defined(__ELF__)) \
1.6 noro 222: && !defined(DOS4GW) && !defined(HURD)
1.1 noro 223: /* I386 code, generic code does not appear to work */
224: /* It does appear to work under OS2, and asms dont */
225: /* This is used for some 38g UNIX variants and for CYGWIN32 */
226: asm("pushl %eax"); asm("call _GC_push_one"); asm("addl $4,%esp");
227: asm("pushl %ecx"); asm("call _GC_push_one"); asm("addl $4,%esp");
228: asm("pushl %edx"); asm("call _GC_push_one"); asm("addl $4,%esp");
229: asm("pushl %ebp"); asm("call _GC_push_one"); asm("addl $4,%esp");
230: asm("pushl %esi"); asm("call _GC_push_one"); asm("addl $4,%esp");
231: asm("pushl %edi"); asm("call _GC_push_one"); asm("addl $4,%esp");
232: asm("pushl %ebx"); asm("call _GC_push_one"); asm("addl $4,%esp");
1.7 ! noro 233: # define HAVE_PUSH_REGS
1.1 noro 234: # endif
235:
236: # if ( defined(I386) && defined(LINUX) && defined(__ELF__) ) \
1.4 noro 237: || ( defined(I386) && defined(FREEBSD) && defined(__ELF__) ) \
238: || ( defined(I386) && defined(NETBSD) && defined(__ELF__) ) \
1.6 noro 239: || ( defined(I386) && defined(OPENBSD) && defined(__ELF__) ) \
240: || ( defined(I386) && defined(HURD) && defined(__ELF__) ) \
241: || ( defined(I386) && defined(DGUX) )
1.1 noro 242:
243: /* This is modified for Linux with ELF (Note: _ELF_ only) */
244: /* This section handles FreeBSD with ELF. */
1.3 noro 245: /* Eax is caller-save and dead here. Other caller-save */
246: /* registers could also be skipped. We assume there are no */
247: /* pointers in MMX registers, etc. */
248: /* We combine instructions in a single asm to prevent gcc from */
249: /* inserting code in the middle. */
250: asm("pushl %ecx; call GC_push_one; addl $4,%esp");
251: asm("pushl %edx; call GC_push_one; addl $4,%esp");
252: asm("pushl %ebp; call GC_push_one; addl $4,%esp");
253: asm("pushl %esi; call GC_push_one; addl $4,%esp");
254: asm("pushl %edi; call GC_push_one; addl $4,%esp");
255: asm("pushl %ebx; call GC_push_one; addl $4,%esp");
1.7 ! noro 256: # define HAVE_PUSH_REGS
1.1 noro 257: # endif
258:
1.4 noro 259: # if ( defined(I386) && defined(BEOS) && defined(__ELF__) )
260: /* As far as I can understand from */
261: /* http://www.beunited.org/articles/jbq/nasm.shtml, */
262: /* only ebp, esi, edi and ebx are not scratch. How MMX */
263: /* etc. registers should be treated, I have no idea. */
264: asm("pushl %ebp; call GC_push_one; addl $4,%esp");
265: asm("pushl %esi; call GC_push_one; addl $4,%esp");
266: asm("pushl %edi; call GC_push_one; addl $4,%esp");
267: asm("pushl %ebx; call GC_push_one; addl $4,%esp");
1.7 ! noro 268: # define HAVE_PUSH_REGS
1.4 noro 269: # endif
270:
1.3 noro 271: # if defined(I386) && defined(MSWIN32) && !defined(__MINGW32__) \
272: && !defined(USE_GENERIC)
1.1 noro 273: /* I386 code, Microsoft variant */
274: __asm push eax
275: __asm call GC_push_one
276: __asm add esp,4
277: __asm push ebx
278: __asm call GC_push_one
279: __asm add esp,4
280: __asm push ecx
281: __asm call GC_push_one
282: __asm add esp,4
283: __asm push edx
284: __asm call GC_push_one
285: __asm add esp,4
286: __asm push ebp
287: __asm call GC_push_one
288: __asm add esp,4
289: __asm push esi
290: __asm call GC_push_one
291: __asm add esp,4
292: __asm push edi
293: __asm call GC_push_one
294: __asm add esp,4
1.7 ! noro 295: # define HAVE_PUSH_REGS
1.1 noro 296: # endif
297:
298: # if defined(I386) && (defined(SVR4) || defined(SCO) || defined(SCO_ELF))
299: /* I386 code, SVR4 variant, generic code does not appear to work */
300: asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp");
301: asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp");
302: asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp");
303: asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp");
304: asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp");
305: asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp");
306: asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp");
1.7 ! noro 307: # define HAVE_PUSH_REGS
1.1 noro 308: # endif
309:
310: # ifdef NS32K
311: asm ("movd r3, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
312: asm ("movd r4, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
313: asm ("movd r5, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
314: asm ("movd r6, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
315: asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
1.7 ! noro 316: # define HAVE_PUSH_REGS
1.1 noro 317: # endif
318:
1.3 noro 319: # if defined(SPARC)
1.7 ! noro 320: GC_save_regs_ret_val = GC_save_regs_in_stack();
! 321: # define HAVE_PUSH_REGS
1.1 noro 322: # endif
323:
324: # ifdef RT
325: GC_push_one(TMP_SP); /* GC_push_one from r11 */
326:
327: asm("cas r11, r6, r0"); GC_push_one(TMP_SP); /* r6 */
328: asm("cas r11, r7, r0"); GC_push_one(TMP_SP); /* through */
329: asm("cas r11, r8, r0"); GC_push_one(TMP_SP); /* r10 */
330: asm("cas r11, r9, r0"); GC_push_one(TMP_SP);
331: asm("cas r11, r10, r0"); GC_push_one(TMP_SP);
332:
333: asm("cas r11, r12, r0"); GC_push_one(TMP_SP); /* r12 */
334: asm("cas r11, r13, r0"); GC_push_one(TMP_SP); /* through */
335: asm("cas r11, r14, r0"); GC_push_one(TMP_SP); /* r15 */
336: asm("cas r11, r15, r0"); GC_push_one(TMP_SP);
1.7 ! noro 337: # define HAVE_PUSH_REGS
1.1 noro 338: # endif
339:
340: # if defined(M68K) && defined(SYSV)
341: /* Once again similar to SUN and HP, though setjmp appears to work.
342: --Parag
343: */
344: # ifdef __GNUC__
345: asm("subqw #0x4,%sp"); /* allocate word on top of stack */
346:
347: asm("movl %a2,%sp@"); asm("jbsr GC_push_one");
348: asm("movl %a3,%sp@"); asm("jbsr GC_push_one");
349: asm("movl %a4,%sp@"); asm("jbsr GC_push_one");
350: asm("movl %a5,%sp@"); asm("jbsr GC_push_one");
351: /* Skip frame pointer and stack pointer */
352: asm("movl %d1,%sp@"); asm("jbsr GC_push_one");
353: asm("movl %d2,%sp@"); asm("jbsr GC_push_one");
354: asm("movl %d3,%sp@"); asm("jbsr GC_push_one");
355: asm("movl %d4,%sp@"); asm("jbsr GC_push_one");
356: asm("movl %d5,%sp@"); asm("jbsr GC_push_one");
357: asm("movl %d6,%sp@"); asm("jbsr GC_push_one");
358: asm("movl %d7,%sp@"); asm("jbsr GC_push_one");
359:
360: asm("addqw #0x4,%sp"); /* put stack back where it was */
1.7 ! noro 361: # define HAVE_PUSH_REGS
1.1 noro 362: # else /* !__GNUC__*/
363: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
364:
365: asm("mov.l %a2,(%sp)"); asm("jsr GC_push_one");
366: asm("mov.l %a3,(%sp)"); asm("jsr GC_push_one");
367: asm("mov.l %a4,(%sp)"); asm("jsr GC_push_one");
368: asm("mov.l %a5,(%sp)"); asm("jsr GC_push_one");
369: /* Skip frame pointer and stack pointer */
370: asm("mov.l %d1,(%sp)"); asm("jsr GC_push_one");
371: asm("mov.l %d2,(%sp)"); asm("jsr GC_push_one");
372: asm("mov.l %d3,(%sp)"); asm("jsr GC_push_one");
373: asm("mov.l %d4,(%sp)"); asm("jsr GC_push_one");
374: asm("mov.l %d5,(%sp)"); asm("jsr GC_push_one");
375: asm("mov.l %d6,(%sp)"); asm("jsr GC_push_one");
376: asm("mov.l %d7,(%sp)"); asm("jsr GC_push_one");
377:
378: asm("addq.w &0x4,%sp"); /* put stack back where it was */
1.7 ! noro 379: # define HAVE_PUSH_REGS
1.1 noro 380: # endif /* !__GNUC__ */
381: # endif /* M68K/SYSV */
382:
1.2 noro 383: # if defined(PJ)
384: {
385: register int * sp asm ("optop");
386: extern int *__libc_stack_end;
387:
388: GC_push_all_stack (sp, __libc_stack_end);
1.7 ! noro 389: # define HAVE_PUSH_REGS
! 390: /* Isn't this redundant with the code to push the stack? */
1.2 noro 391: }
392: # endif
1.1 noro 393:
394: /* other machines... */
1.7 ! noro 395: # if !defined(HAVE_PUSH_REGS)
! 396: --> We just generated an empty GC_push_regs, which
! 397: --> is almost certainly broken. Try defining
! 398: --> USE_GENERIC_PUSH_REGS instead.
1.1 noro 399: # endif
400: }
1.7 ! noro 401: #endif /* !USE_GENERIC_PUSH_REGS && !USE_ASM_PUSH_REGS */
1.1 noro 402:
403: #if defined(USE_GENERIC_PUSH_REGS)
404: void GC_generic_push_regs(cold_gc_frame)
405: ptr_t cold_gc_frame;
406: {
407: {
1.6 noro 408: # ifdef HAVE_BUILTIN_UNWIND_INIT
409: /* This was suggested by Richard Henderson as the way to */
410: /* force callee-save registers and register windows onto */
411: /* the stack. */
412: __builtin_unwind_init();
413: # else /* !HAVE_BUILTIN_UNWIND_INIT */
414: /* Generic code */
415: /* The idea is due to Parag Patel at HP. */
416: /* We're not sure whether he would like */
417: /* to be he acknowledged for it or not. */
418: jmp_buf regs;
419: register word * i = (word *) regs;
420: register ptr_t lim = (ptr_t)(regs) + (sizeof regs);
1.1 noro 421:
1.6 noro 422: /* Setjmp doesn't always clear all of the buffer. */
423: /* That tends to preserve garbage. Clear it. */
1.1 noro 424: for (; (char *)i < lim; i++) {
425: *i = 0;
426: }
1.6 noro 427: # if defined(POWERPC) || defined(MSWIN32) || defined(MSWINCE) \
428: || defined(UTS4) || defined(LINUX) || defined(EWS4800)
429: (void) setjmp(regs);
430: # else
431: (void) _setjmp(regs);
432: # endif
433: # endif /* !HAVE_BUILTIN_UNWIND_INIT */
434: # if (defined(SPARC) && !defined(HAVE_BUILTIN_UNWIND_INIT)) \
435: || defined(IA64)
1.3 noro 436: /* On a register window machine, we need to save register */
437: /* contents on the stack for this to work. The setjmp */
438: /* is probably not needed on SPARC, since pointers are */
439: /* only stored in windowed or scratch registers. It is */
440: /* needed on IA64, since some non-windowed registers are */
441: /* preserved. */
442: {
443: GC_save_regs_ret_val = GC_save_regs_in_stack();
1.6 noro 444: /* On IA64 gcc, could use __builtin_ia64_flushrs() and */
445: /* __builtin_ia64_flushrs(). The latter will be done */
446: /* implicitly by __builtin_unwind_init() for gcc3.0.1 */
447: /* and later. */
1.3 noro 448: }
449: # endif
1.1 noro 450: GC_push_current_stack(cold_gc_frame);
451: }
452: }
453: #endif /* USE_GENERIC_PUSH_REGS */
454:
455: /* On register window machines, we need a way to force registers into */
456: /* the stack. Return sp. */
457: # ifdef SPARC
458: asm(" .seg \"text\"");
1.7 ! noro 459: # if defined(SVR4) || defined(NETBSD)
1.1 noro 460: asm(" .globl GC_save_regs_in_stack");
461: asm("GC_save_regs_in_stack:");
462: asm(" .type GC_save_regs_in_stack,#function");
463: # else
464: asm(" .globl _GC_save_regs_in_stack");
465: asm("_GC_save_regs_in_stack:");
466: # endif
1.4 noro 467: # if defined(__arch64__) || defined(__sparcv9)
468: asm(" save %sp,-128,%sp");
469: asm(" flushw");
470: asm(" ret");
471: asm(" restore %sp,2047+128,%o0");
472: # else
473: asm(" ta 0x3 ! ST_FLUSH_WINDOWS");
474: asm(" retl");
475: asm(" mov %sp,%o0");
476: # endif
1.1 noro 477: # ifdef SVR4
478: asm(" .GC_save_regs_in_stack_end:");
479: asm(" .size GC_save_regs_in_stack,.GC_save_regs_in_stack_end-GC_save_regs_in_stack");
480: # endif
481: # ifdef LINT
482: word GC_save_regs_in_stack() { return(0 /* sp really */);}
483: # endif
484: # endif
485:
1.2 noro 486: /* On IA64, we also need to flush register windows. But they end */
487: /* up on the other side of the stack segment. */
488: /* Returns the backing store pointer for the register stack. */
1.6 noro 489: /* We now implement this as a separate assembly file, since inline */
490: /* assembly code here doesn't work with either the Intel or HP */
491: /* compilers. */
492: # if 0
493: # ifdef LINUX
1.2 noro 494: asm(" .text");
495: asm(" .psr abi64");
496: asm(" .psr lsb");
497: asm(" .lsb");
498: asm("");
499: asm(" .text");
500: asm(" .align 16");
501: asm(" .global GC_save_regs_in_stack");
502: asm(" .proc GC_save_regs_in_stack");
503: asm("GC_save_regs_in_stack:");
504: asm(" .body");
505: asm(" flushrs");
506: asm(" ;;");
507: asm(" mov r8=ar.bsp");
508: asm(" br.ret.sptk.few rp");
509: asm(" .endp GC_save_regs_in_stack");
1.6 noro 510: # endif /* LINUX */
511: # if 0 /* Other alternatives that don't work on HP/UX */
512: word GC_save_regs_in_stack() {
513: # if USE_BUILTINS
514: __builtin_ia64_flushrs();
515: return __builtin_ia64_bsp();
516: # else
517: # ifdef HPUX
518: _asm(" flushrs");
519: _asm(" ;;");
520: _asm(" mov r8=ar.bsp");
521: _asm(" br.ret.sptk.few rp");
522: # else
523: asm(" flushrs");
524: asm(" ;;");
525: asm(" mov r8=ar.bsp");
526: asm(" br.ret.sptk.few rp");
527: # endif
528: # endif
1.4 noro 529: }
530: # endif
1.2 noro 531: # endif
1.1 noro 532:
533: /* GC_clear_stack_inner(arg, limit) clears stack area up to limit and */
534: /* returns arg. Stack clearing is crucial on SPARC, so we supply */
535: /* an assembly version that's more careful. Assumes limit is hotter */
536: /* than sp, and limit is 8 byte aligned. */
1.6 noro 537: #if defined(ASM_CLEAR_CODE)
1.1 noro 538: #ifndef SPARC
539: --> fix it
540: #endif
541: # ifdef SUNOS4
542: asm(".globl _GC_clear_stack_inner");
543: asm("_GC_clear_stack_inner:");
544: # else
545: asm(".globl GC_clear_stack_inner");
546: asm("GC_clear_stack_inner:");
547: asm(".type GC_save_regs_in_stack,#function");
548: # endif
1.4 noro 549: #if defined(__arch64__) || defined(__sparcv9)
550: asm("mov %sp,%o2"); /* Save sp */
551: asm("add %sp,2047-8,%o3"); /* p = sp+bias-8 */
552: asm("add %o1,-2047-192,%sp"); /* Move sp out of the way, */
553: /* so that traps still work. */
554: /* Includes some extra words */
555: /* so we can be sloppy below. */
556: asm("loop:");
557: asm("stx %g0,[%o3]"); /* *(long *)p = 0 */
558: asm("cmp %o3,%o1");
559: asm("bgu,pt %xcc, loop"); /* if (p > limit) goto loop */
560: asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */
561: asm("retl");
562: asm("mov %o2,%sp"); /* Restore sp., delay slot */
563: #else
1.1 noro 564: asm("mov %sp,%o2"); /* Save sp */
565: asm("add %sp,-8,%o3"); /* p = sp-8 */
566: asm("clr %g1"); /* [g0,g1] = 0 */
567: asm("add %o1,-0x60,%sp"); /* Move sp out of the way, */
568: /* so that traps still work. */
569: /* Includes some extra words */
570: /* so we can be sloppy below. */
571: asm("loop:");
572: asm("std %g0,[%o3]"); /* *(long long *)p = 0 */
573: asm("cmp %o3,%o1");
574: asm("bgu loop "); /* if (p > limit) goto loop */
575: asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */
576: asm("retl");
577: asm("mov %o2,%sp"); /* Restore sp., delay slot */
1.4 noro 578: #endif /* old SPARC */
1.1 noro 579: /* First argument = %o0 = return value */
580: # ifdef SVR4
581: asm(" .GC_clear_stack_inner_end:");
582: asm(" .size GC_clear_stack_inner,.GC_clear_stack_inner_end-GC_clear_stack_inner");
583: # endif
584:
585: # ifdef LINT
586: /*ARGSUSED*/
587: ptr_t GC_clear_stack_inner(arg, limit)
588: ptr_t arg; word limit;
589: { return(arg); }
590: # endif
591: #endif
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