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stl_algo (__stl_threshold): Declare external.
[gcc.git] / boehm-gc / mach_dep.c
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73ffefd0
TT		 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 */
9110a741 15# include "private/gc_priv.h"
73ffefd0
TT		 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
20bbd3cd 23# ifndef __GNUC__
9110a741 24# include <dos.h>
20bbd3cd
TT		 25# else
26# include <machine/reg.h>
27# endif
73ffefd0
TT		 28# endif
29
30#if defined(__MWERKS__) && !defined(POWERPC)
31
32asm 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
20bbd3cd
TT		 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
73ffefd0
TT		 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
20bbd3cd 77#ifndef USE_GENERIC_PUSH_REGS
73ffefd0
TT		 78void GC_push_regs()
79{
80# ifdef RT
81 register long TMP_SP; /* must be bound to r11 */
82# endif
93002327
BM		 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
73ffefd0
TT		 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
20bbd3cd
TT		 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__ */
73ffefd0
TT		 179 GC_push_one(getreg(REG_A2));
180 GC_push_one(getreg(REG_A3));
9110a741
BM		 181# ifndef __SASC
182 /* Can probably be changed to #if 0 -Kjetil M. (a4=globals)*/
183 GC_push_one(getreg(REG_A4));
184# endif
73ffefd0
TT		 185 GC_push_one(getreg(REG_A5));
186 GC_push_one(getreg(REG_A6));
187 /* Skip stack pointer */
188 GC_push_one(getreg(REG_D2));
189 GC_push_one(getreg(REG_D3));
190 GC_push_one(getreg(REG_D4));
191 GC_push_one(getreg(REG_D5));
192 GC_push_one(getreg(REG_D6));
193 GC_push_one(getreg(REG_D7));
20bbd3cd
TT		 194# endif /* !__GNUC__ */
195# endif /* AMIGA */
73ffefd0
TT		 196
197# if defined(M68K) && defined(MACOS)
198# if defined(THINK_C)
199# define PushMacReg(reg) \
200 move.l reg,(sp) \
201 jsr GC_push_one
202 asm {
203 sub.w #4,sp ; reserve space for one parameter.
204 PushMacReg(a2);
205 PushMacReg(a3);
206 PushMacReg(a4);
207 ; skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
208 PushMacReg(d2);
209 PushMacReg(d3);
210 PushMacReg(d4);
211 PushMacReg(d5);
212 PushMacReg(d6);
213 PushMacReg(d7);
214 add.w #4,sp ; fix stack.
215 }
216# undef PushMacReg
217# endif /* THINK_C */
218# if defined(__MWERKS__)
219 PushMacRegisters();
220# endif /* __MWERKS__ */
221# endif /* MACOS */
222
93002327
BM		 223# if defined(I386) &&!defined(OS2) &&!defined(SVR4) \
224 && (defined(__MINGW32__) || !defined(MSWIN32)) \
20bbd3cd 225 && !defined(SCO) && !defined(SCO_ELF) \
9110a741 226 && !(defined(LINUX) && defined(__ELF__)) \
93002327 227 && !(defined(FREEBSD) && defined(__ELF__)) \
9110a741
BM		 228 && !(defined(NETBSD) && defined(__ELF__)) \
229 && !(defined(OPENBSD) && defined(__ELF__)) \
230 && !(defined(BEOS) && defined(__ELF__)) \
5a2586cf 231 && !defined(DOS4GW) && !defined(HURD)
73ffefd0
TT		 232 /* I386 code, generic code does not appear to work */
233 /* It does appear to work under OS2, and asms dont */
234 /* This is used for some 38g UNIX variants and for CYGWIN32 */
235 asm("pushl %eax"); asm("call _GC_push_one"); asm("addl $4,%esp");
236 asm("pushl %ecx"); asm("call _GC_push_one"); asm("addl $4,%esp");
237 asm("pushl %edx"); asm("call _GC_push_one"); asm("addl $4,%esp");
238 asm("pushl %ebp"); asm("call _GC_push_one"); asm("addl $4,%esp");
239 asm("pushl %esi"); asm("call _GC_push_one"); asm("addl $4,%esp");
240 asm("pushl %edi"); asm("call _GC_push_one"); asm("addl $4,%esp");
241 asm("pushl %ebx"); asm("call _GC_push_one"); asm("addl $4,%esp");
242# endif
243
20bbd3cd 244# if ( defined(I386) && defined(LINUX) && defined(__ELF__) ) \
9110a741
BM		 245 || ( defined(I386) && defined(FREEBSD) && defined(__ELF__) ) \
246 || ( defined(I386) && defined(NETBSD) && defined(__ELF__) ) \
5a2586cf
TT		 247 || ( defined(I386) && defined(OPENBSD) && defined(__ELF__) ) \
248 || ( defined(I386) && defined(HURD) && defined(__ELF__) )
20bbd3cd
TT		 249
250 /* This is modified for Linux with ELF (Note: _ELF_ only) */
251 /* This section handles FreeBSD with ELF. */
93002327
BM		 252 /* Eax is caller-save and dead here. Other caller-save */
253 /* registers could also be skipped. We assume there are no */
254 /* pointers in MMX registers, etc. */
255 /* We combine instructions in a single asm to prevent gcc from */
256 /* inserting code in the middle. */
257 asm("pushl %ecx; call GC_push_one; addl $4,%esp");
258 asm("pushl %edx; call GC_push_one; addl $4,%esp");
259 asm("pushl %ebp; call GC_push_one; addl $4,%esp");
260 asm("pushl %esi; call GC_push_one; addl $4,%esp");
261 asm("pushl %edi; call GC_push_one; addl $4,%esp");
262 asm("pushl %ebx; call GC_push_one; addl $4,%esp");
73ffefd0
TT		 263# endif
264
9110a741
BM		 265# if ( defined(I386) && defined(BEOS) && defined(__ELF__) )
266 /* As far as I can understand from */
267 /* http://www.beunited.org/articles/jbq/nasm.shtml, */
268 /* only ebp, esi, edi and ebx are not scratch. How MMX */
269 /* etc. registers should be treated, I have no idea. */
270 asm("pushl %ebp; call GC_push_one; addl $4,%esp");
271 asm("pushl %esi; call GC_push_one; addl $4,%esp");
272 asm("pushl %edi; call GC_push_one; addl $4,%esp");
273 asm("pushl %ebx; call GC_push_one; addl $4,%esp");
274# endif
275
93002327
BM		 276# if defined(I386) && defined(MSWIN32) && !defined(__MINGW32__) \
277 && !defined(USE_GENERIC)
73ffefd0
TT		 278 /* I386 code, Microsoft variant */
279 __asm push eax
280 __asm call GC_push_one
281 __asm add esp,4
282 __asm push ebx
283 __asm call GC_push_one
284 __asm add esp,4
285 __asm push ecx
286 __asm call GC_push_one
287 __asm add esp,4
288 __asm push edx
289 __asm call GC_push_one
290 __asm add esp,4
291 __asm push ebp
292 __asm call GC_push_one
293 __asm add esp,4
294 __asm push esi
295 __asm call GC_push_one
296 __asm add esp,4
297 __asm push edi
298 __asm call GC_push_one
299 __asm add esp,4
300# endif
301
302# if defined(I386) && (defined(SVR4) || defined(SCO) || defined(SCO_ELF))
303 /* I386 code, SVR4 variant, generic code does not appear to work */
304 asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp");
305 asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp");
306 asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp");
307 asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp");
308 asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp");
309 asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp");
310 asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp");
311# endif
312
313# ifdef NS32K
314 asm ("movd r3, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
315 asm ("movd r4, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
316 asm ("movd r5, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
317 asm ("movd r6, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
318 asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
319# endif
320
93002327 321# if defined(SPARC)
73ffefd0
TT		 322 {
323 word GC_save_regs_in_stack();
324
20bbd3cd 325 GC_save_regs_ret_val = GC_save_regs_in_stack();
73ffefd0
TT		 326 }
327# endif
328
329# ifdef RT
330 GC_push_one(TMP_SP); /* GC_push_one from r11 */
331
332 asm("cas r11, r6, r0"); GC_push_one(TMP_SP); /* r6 */
333 asm("cas r11, r7, r0"); GC_push_one(TMP_SP); /* through */
334 asm("cas r11, r8, r0"); GC_push_one(TMP_SP); /* r10 */
335 asm("cas r11, r9, r0"); GC_push_one(TMP_SP);
336 asm("cas r11, r10, r0"); GC_push_one(TMP_SP);
337
338 asm("cas r11, r12, r0"); GC_push_one(TMP_SP); /* r12 */
339 asm("cas r11, r13, r0"); GC_push_one(TMP_SP); /* through */
340 asm("cas r11, r14, r0"); GC_push_one(TMP_SP); /* r15 */
341 asm("cas r11, r15, r0"); GC_push_one(TMP_SP);
342# endif
343
344# if defined(M68K) && defined(SYSV)
345 /* Once again similar to SUN and HP, though setjmp appears to work.
346 --Parag
347 */
348# ifdef __GNUC__
349 asm("subqw #0x4,%sp"); /* allocate word on top of stack */
350
351 asm("movl %a2,%sp@"); asm("jbsr GC_push_one");
352 asm("movl %a3,%sp@"); asm("jbsr GC_push_one");
353 asm("movl %a4,%sp@"); asm("jbsr GC_push_one");
354 asm("movl %a5,%sp@"); asm("jbsr GC_push_one");
355 /* Skip frame pointer and stack pointer */
356 asm("movl %d1,%sp@"); asm("jbsr GC_push_one");
357 asm("movl %d2,%sp@"); asm("jbsr GC_push_one");
358 asm("movl %d3,%sp@"); asm("jbsr GC_push_one");
359 asm("movl %d4,%sp@"); asm("jbsr GC_push_one");
360 asm("movl %d5,%sp@"); asm("jbsr GC_push_one");
361 asm("movl %d6,%sp@"); asm("jbsr GC_push_one");
362 asm("movl %d7,%sp@"); asm("jbsr GC_push_one");
363
364 asm("addqw #0x4,%sp"); /* put stack back where it was */
365# else /* !__GNUC__*/
366 asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
367
368 asm("mov.l %a2,(%sp)"); asm("jsr GC_push_one");
369 asm("mov.l %a3,(%sp)"); asm("jsr GC_push_one");
370 asm("mov.l %a4,(%sp)"); asm("jsr GC_push_one");
371 asm("mov.l %a5,(%sp)"); asm("jsr GC_push_one");
372 /* Skip frame pointer and stack pointer */
373 asm("mov.l %d1,(%sp)"); asm("jsr GC_push_one");
374 asm("mov.l %d2,(%sp)"); asm("jsr GC_push_one");
375 asm("mov.l %d3,(%sp)"); asm("jsr GC_push_one");
376 asm("mov.l %d4,(%sp)"); asm("jsr GC_push_one");
377 asm("mov.l %d5,(%sp)"); asm("jsr GC_push_one");
378 asm("mov.l %d6,(%sp)"); asm("jsr GC_push_one");
379 asm("mov.l %d7,(%sp)"); asm("jsr GC_push_one");
380
381 asm("addq.w &0x4,%sp"); /* put stack back where it was */
382# endif /* !__GNUC__ */
383# endif /* M68K/SYSV */
384
20bbd3cd
TT		 385# if defined(PJ)
386 {
387 register int * sp asm ("optop");
388 extern int *__libc_stack_end;
73ffefd0 389
20bbd3cd
TT		 390 GC_push_all_stack (sp, __libc_stack_end);
391 }
392# endif
393
394 /* other machines... */
5a2586cf
TT		 395# if !defined(M68K) && !defined(VAX) && !defined(RT)
396# if !defined(SPARC) && !defined(I386) && !defined(NS32K)
93002327
BM		 397# if !defined(POWERPC) && !defined(UTS4)
398# if !defined(PJ) && !(defined(MIPS) && defined(LINUX))
20bbd3cd
TT		 399 --> bad news <--
400# endif
401# endif
402# endif
403# endif
404}
405#endif /* !USE_GENERIC_PUSH_REGS */
406
407#if defined(USE_GENERIC_PUSH_REGS)
408void GC_generic_push_regs(cold_gc_frame)
409ptr_t cold_gc_frame;
410{
73ffefd0 411 {
5a2586cf
TT		 412# ifdef HAVE_BUILTIN_UNWIND_INIT
413 /* This was suggested by Richard Henderson as the way to */
414 /* force callee-save registers and register windows onto */
415 /* the stack. */
416 __builtin_unwind_init();
417# else /* !HAVE_BUILTIN_UNWIND_INIT */
418 /* Generic code */
419 /* The idea is due to Parag Patel at HP. */
420 /* We're not sure whether he would like */
421 /* to be he acknowledged for it or not. */
422 jmp_buf regs;
423 register word * i = (word *) regs;
424 register ptr_t lim = (ptr_t)(regs) + (sizeof regs);
425
426 /* Setjmp doesn't always clear all of the buffer. */
427 /* That tends to preserve garbage. Clear it. */
73ffefd0
TT		 428 for (; (char *)i < lim; i++) {
429 *i = 0;
430 }
5a2586cf
TT		 431# if defined(POWERPC) || defined(MSWIN32) || defined(MSWINCE) \
432 || defined(UTS4) || defined(LINUX)
433 (void) setjmp(regs);
434# else
435 (void) _setjmp(regs);
436# endif
437# endif /* !HAVE_BUILTIN_UNWIND_INIT */
438# if (defined(SPARC) && !defined(HAVE_BUILTIN_UNWIND_INIT)) \
439 || defined(IA64)
93002327
BM		 440 /* On a register window machine, we need to save register */
441 /* contents on the stack for this to work. The setjmp */
442 /* is probably not needed on SPARC, since pointers are */
443 /* only stored in windowed or scratch registers. It is */
444 /* needed on IA64, since some non-windowed registers are */
445 /* preserved. */
446 {
447 word GC_save_regs_in_stack();
448
449 GC_save_regs_ret_val = GC_save_regs_in_stack();
5a2586cf
TT		 450 /* On IA64 gcc, could use __builtin_ia64_flushrs() and */
451 /* __builtin_ia64_flushrs(). The latter will be done */
452 /* implicitly by __builtin_unwind_init() for gcc3.0.1 */
453 /* and later. */
93002327
BM		 454 }
455# endif
20bbd3cd 456 GC_push_current_stack(cold_gc_frame);
73ffefd0 457 }
73ffefd0 458}
20bbd3cd 459#endif /* USE_GENERIC_PUSH_REGS */
73ffefd0
TT		 460
461/* On register window machines, we need a way to force registers into */
462/* the stack. Return sp. */
463# ifdef SPARC
464 asm(" .seg \"text\"");
465# ifdef SVR4
466 asm(" .globl GC_save_regs_in_stack");
467 asm("GC_save_regs_in_stack:");
468 asm(" .type GC_save_regs_in_stack,#function");
469# else
470 asm(" .globl _GC_save_regs_in_stack");
471 asm("_GC_save_regs_in_stack:");
472# endif
70635f1e 473# if defined(__arch64__) || defined(__sparcv9)
9110a741
BM		 474 asm(" save %sp,-128,%sp");
475 asm(" flushw");
476 asm(" ret");
477 asm(" restore %sp,2047+128,%o0");
70635f1e 478# else
9110a741
BM		 479 asm(" ta 0x3 ! ST_FLUSH_WINDOWS");
480 asm(" retl");
481 asm(" mov %sp,%o0");
482# endif
73ffefd0
TT		 483# ifdef SVR4
484 asm(" .GC_save_regs_in_stack_end:");
485 asm(" .size GC_save_regs_in_stack,.GC_save_regs_in_stack_end-GC_save_regs_in_stack");
486# endif
487# ifdef LINT
488 word GC_save_regs_in_stack() { return(0 /* sp really */);}
489# endif
490# endif
491
20bbd3cd
TT		 492/* On IA64, we also need to flush register windows. But they end */
493/* up on the other side of the stack segment. */
494/* Returns the backing store pointer for the register stack. */
4c7726b1 495/* We implement this as a separate file in HP/UX. */
20bbd3cd 496# ifdef IA64
4c7726b1 497# ifdef LINUX
20bbd3cd
TT		 498 asm(" .text");
499 asm(" .psr abi64");
500 asm(" .psr lsb");
501 asm(" .lsb");
502 asm("");
503 asm(" .text");
504 asm(" .align 16");
505 asm(" .global GC_save_regs_in_stack");
506 asm(" .proc GC_save_regs_in_stack");
507 asm("GC_save_regs_in_stack:");
508 asm(" .body");
509 asm(" flushrs");
510 asm(" ;;");
511 asm(" mov r8=ar.bsp");
512 asm(" br.ret.sptk.few rp");
513 asm(" .endp GC_save_regs_in_stack");
4c7726b1
BM		 514# endif /* LINUX */
515# if 0 /* Other alternatives that don't work on HP/UX */
516 word GC_save_regs_in_stack() {
517# if USE_BUILTINS
518 __builtin_ia64_flushrs();
519 return __builtin_ia64_bsp();
520# else
521# ifdef HPUX
522 _asm(" flushrs");
523 _asm(" ;;");
524 _asm(" mov r8=ar.bsp");
525 _asm(" br.ret.sptk.few rp");
526# else
527 asm(" flushrs");
528 asm(" ;;");
529 asm(" mov r8=ar.bsp");
530 asm(" br.ret.sptk.few rp");
531# endif
532# endif
9110a741
BM		 533 }
534# endif
20bbd3cd 535# endif
73ffefd0
TT		 536
537/* GC_clear_stack_inner(arg, limit) clears stack area up to limit and */
538/* returns arg. Stack clearing is crucial on SPARC, so we supply */
539/* an assembly version that's more careful. Assumes limit is hotter */
540/* than sp, and limit is 8 byte aligned. */
5a2586cf 541#if defined(ASM_CLEAR_CODE)
73ffefd0
TT		 542#ifndef SPARC
543 --> fix it
544#endif
545# ifdef SUNOS4
546 asm(".globl _GC_clear_stack_inner");
547 asm("_GC_clear_stack_inner:");
548# else
549 asm(".globl GC_clear_stack_inner");
550 asm("GC_clear_stack_inner:");
551 asm(".type GC_save_regs_in_stack,#function");
552# endif
70635f1e
JJ		 553#if defined(__arch64__) || defined(__sparcv9)
554 asm("mov %sp,%o2"); /* Save sp */
555 asm("add %sp,2047-8,%o3"); /* p = sp+bias-8 */
556 asm("add %o1,-2047-192,%sp"); /* Move sp out of the way, */
557 /* so that traps still work. */
558 /* Includes some extra words */
559 /* so we can be sloppy below. */
560 asm("loop:");
561 asm("stx %g0,[%o3]"); /* *(long *)p = 0 */
562 asm("cmp %o3,%o1");
563 asm("bgu,pt %xcc, loop"); /* if (p > limit) goto loop */
564 asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */
565 asm("retl");
566 asm("mov %o2,%sp"); /* Restore sp., delay slot */
567#else
73ffefd0
TT		 568 asm("mov %sp,%o2"); /* Save sp */
569 asm("add %sp,-8,%o3"); /* p = sp-8 */
570 asm("clr %g1"); /* [g0,g1] = 0 */
571 asm("add %o1,-0x60,%sp"); /* Move sp out of the way, */
572 /* so that traps still work. */
573 /* Includes some extra words */
574 /* so we can be sloppy below. */
575 asm("loop:");
576 asm("std %g0,[%o3]"); /* *(long long *)p = 0 */
577 asm("cmp %o3,%o1");
578 asm("bgu loop "); /* if (p > limit) goto loop */
579 asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */
580 asm("retl");
581 asm("mov %o2,%sp"); /* Restore sp., delay slot */
9110a741 582#endif /* old SPARC */
73ffefd0
TT		 583 /* First argument = %o0 = return value */
584# ifdef SVR4
585 asm(" .GC_clear_stack_inner_end:");
586 asm(" .size GC_clear_stack_inner,.GC_clear_stack_inner_end-GC_clear_stack_inner");
587# endif
588
589# ifdef LINT
590 /*ARGSUSED*/
591 ptr_t GC_clear_stack_inner(arg, limit)
592 ptr_t arg; word limit;
593 { return(arg); }
594# endif
595#endif
GNU Compiler Collection
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