Annotation of OpenXM_contrib2/asir2000/gc5.3/mach_dep.c, Revision 1.1
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:
! 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:
! 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
! 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:
! 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:
! 220: # if defined(I386) &&!defined(OS2) &&!defined(SVR4) \
! 221: && (defined(__MINGW32__) || !defined(MSWIN32)) \
! 222: && !defined(SCO) && !defined(SCO_ELF) \
! 223: && !(defined(LINUX) && defined(__ELF__)) \
! 224: && !(defined(FREEBSD) && defined(__ELF__)) \
! 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__) ) \
! 239: || ( defined(I386) && defined(FREEBSD) && defined(__ELF__) )
! 240:
! 241: /* This is modified for Linux with ELF (Note: _ELF_ only) */
! 242: /* This section handles FreeBSD with ELF. */
! 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");
! 254: # endif
! 255:
! 256: # if defined(I386) && defined(MSWIN32) && !defined(__MINGW32__) \
! 257: && !defined(USE_GENERIC)
! 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:
! 301: # if defined(SPARC)
! 302: {
! 303: word GC_save_regs_in_stack();
! 304:
! 305: GC_save_regs_ret_val = GC_save_regs_in_stack();
! 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:
! 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
! 373:
! 374: /* other machines... */
! 375: # if !(defined M68K) && !(defined VAX) && !(defined RT)
! 376: # if !(defined SPARC) && !(defined I386) && !(defined NS32K)
! 377: # if !defined(POWERPC) && !defined(UTS4)
! 378: # if !defined(PJ) && !(defined(MIPS) && defined(LINUX))
! 379: --> bad news <--
! 380: # endif
! 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: }
! 405: # if defined(POWERPC) || defined(MSWIN32) || defined(UTS4) || defined(LINUX)
! 406: (void) setjmp(regs);
! 407: # else
! 408: (void) _setjmp(regs);
! 409: # endif
! 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
! 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:
! 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
! 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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