Annotation of OpenXM_contrib/gc/mach_dep.c, Revision 1.1
1.1 ! maekawa 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: # include <dos.h>
! 24: # endif
! 25:
! 26: #if defined(__MWERKS__) && !defined(POWERPC)
! 27:
! 28: asm static void PushMacRegisters()
! 29: {
! 30: sub.w #4,sp // reserve space for one parameter.
! 31: move.l a2,(sp)
! 32: jsr GC_push_one
! 33: move.l a3,(sp)
! 34: jsr GC_push_one
! 35: move.l a4,(sp)
! 36: jsr GC_push_one
! 37: # if !__option(a6frames)
! 38: // <pcb> perhaps a6 should be pushed if stack frames are not being used.
! 39: move.l a6,(sp)
! 40: jsr GC_push_one
! 41: # endif
! 42: // skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
! 43: move.l d2,(sp)
! 44: jsr GC_push_one
! 45: move.l d3,(sp)
! 46: jsr GC_push_one
! 47: move.l d4,(sp)
! 48: jsr GC_push_one
! 49: move.l d5,(sp)
! 50: jsr GC_push_one
! 51: move.l d6,(sp)
! 52: jsr GC_push_one
! 53: move.l d7,(sp)
! 54: jsr GC_push_one
! 55: add.w #4,sp // fix stack.
! 56: rts
! 57: }
! 58:
! 59: #endif /* __MWERKS__ */
! 60:
! 61: /* Routine to mark from registers that are preserved by the C compiler. */
! 62: /* This must be ported to every new architecture. There is a generic */
! 63: /* version at the end, that is likely, but not guaranteed to work */
! 64: /* on your architecture. Run the test_setjmp program to see whether */
! 65: /* there is any chance it will work. */
! 66:
! 67: #ifndef USE_GENERIC_PUSH_REGS
! 68: void GC_push_regs()
! 69: {
! 70: # ifdef RT
! 71: register long TMP_SP; /* must be bound to r11 */
! 72: # endif
! 73: # ifdef VAX
! 74: /* VAX - generic code below does not work under 4.2 */
! 75: /* r1 through r5 are caller save, and therefore */
! 76: /* on the stack or dead. */
! 77: asm("pushl r11"); asm("calls $1,_GC_push_one");
! 78: asm("pushl r10"); asm("calls $1,_GC_push_one");
! 79: asm("pushl r9"); asm("calls $1,_GC_push_one");
! 80: asm("pushl r8"); asm("calls $1,_GC_push_one");
! 81: asm("pushl r7"); asm("calls $1,_GC_push_one");
! 82: asm("pushl r6"); asm("calls $1,_GC_push_one");
! 83: # endif
! 84: # if defined(M68K) && (defined(SUNOS4) || defined(NEXT))
! 85: /* M68K SUNOS - could be replaced by generic code */
! 86: /* a0, a1 and d1 are caller save */
! 87: /* and therefore are on stack or dead. */
! 88:
! 89: asm("subqw #0x4,sp"); /* allocate word on top of stack */
! 90:
! 91: asm("movl a2,sp@"); asm("jbsr _GC_push_one");
! 92: asm("movl a3,sp@"); asm("jbsr _GC_push_one");
! 93: asm("movl a4,sp@"); asm("jbsr _GC_push_one");
! 94: asm("movl a5,sp@"); asm("jbsr _GC_push_one");
! 95: /* Skip frame pointer and stack pointer */
! 96: asm("movl d1,sp@"); asm("jbsr _GC_push_one");
! 97: asm("movl d2,sp@"); asm("jbsr _GC_push_one");
! 98: asm("movl d3,sp@"); asm("jbsr _GC_push_one");
! 99: asm("movl d4,sp@"); asm("jbsr _GC_push_one");
! 100: asm("movl d5,sp@"); asm("jbsr _GC_push_one");
! 101: asm("movl d6,sp@"); asm("jbsr _GC_push_one");
! 102: asm("movl d7,sp@"); asm("jbsr _GC_push_one");
! 103:
! 104: asm("addqw #0x4,sp"); /* put stack back where it was */
! 105: # endif
! 106:
! 107: # if defined(M68K) && defined(HP)
! 108: /* M68K HP - could be replaced by generic code */
! 109: /* a0, a1 and d1 are caller save. */
! 110:
! 111: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
! 112:
! 113: asm("mov.l %a2,(%sp)"); asm("jsr _GC_push_one");
! 114: asm("mov.l %a3,(%sp)"); asm("jsr _GC_push_one");
! 115: asm("mov.l %a4,(%sp)"); asm("jsr _GC_push_one");
! 116: asm("mov.l %a5,(%sp)"); asm("jsr _GC_push_one");
! 117: /* Skip frame pointer and stack pointer */
! 118: asm("mov.l %d1,(%sp)"); asm("jsr _GC_push_one");
! 119: asm("mov.l %d2,(%sp)"); asm("jsr _GC_push_one");
! 120: asm("mov.l %d3,(%sp)"); asm("jsr _GC_push_one");
! 121: asm("mov.l %d4,(%sp)"); asm("jsr _GC_push_one");
! 122: asm("mov.l %d5,(%sp)"); asm("jsr _GC_push_one");
! 123: asm("mov.l %d6,(%sp)"); asm("jsr _GC_push_one");
! 124: asm("mov.l %d7,(%sp)"); asm("jsr _GC_push_one");
! 125:
! 126: asm("addq.w &0x4,%sp"); /* put stack back where it was */
! 127: # endif /* M68K HP */
! 128:
! 129: # ifdef AMIGA
! 130: /* AMIGA - could be replaced by generic code */
! 131: /* a0, a1, d0 and d1 are caller save */
! 132: GC_push_one(getreg(REG_A2));
! 133: GC_push_one(getreg(REG_A3));
! 134: GC_push_one(getreg(REG_A4));
! 135: GC_push_one(getreg(REG_A5));
! 136: GC_push_one(getreg(REG_A6));
! 137: /* Skip stack pointer */
! 138: GC_push_one(getreg(REG_D2));
! 139: GC_push_one(getreg(REG_D3));
! 140: GC_push_one(getreg(REG_D4));
! 141: GC_push_one(getreg(REG_D5));
! 142: GC_push_one(getreg(REG_D6));
! 143: GC_push_one(getreg(REG_D7));
! 144: # endif
! 145:
! 146: # if defined(M68K) && defined(MACOS)
! 147: # if defined(THINK_C)
! 148: # define PushMacReg(reg) \
! 149: move.l reg,(sp) \
! 150: jsr GC_push_one
! 151: asm {
! 152: sub.w #4,sp ; reserve space for one parameter.
! 153: PushMacReg(a2);
! 154: PushMacReg(a3);
! 155: PushMacReg(a4);
! 156: ; skip a5 (globals), a6 (frame pointer), and a7 (stack pointer)
! 157: PushMacReg(d2);
! 158: PushMacReg(d3);
! 159: PushMacReg(d4);
! 160: PushMacReg(d5);
! 161: PushMacReg(d6);
! 162: PushMacReg(d7);
! 163: add.w #4,sp ; fix stack.
! 164: }
! 165: # undef PushMacReg
! 166: # endif /* THINK_C */
! 167: # if defined(__MWERKS__)
! 168: PushMacRegisters();
! 169: # endif /* __MWERKS__ */
! 170: # endif /* MACOS */
! 171:
! 172: # if defined(I386) &&!defined(OS2) &&!defined(SVR4) &&!defined(MSWIN32) \
! 173: && !defined(SCO) && !defined(SCO_ELF) \
! 174: && !(defined(LINUX) && defined(__ELF__)) \
! 175: && !(defined(__FreeBSD__) && defined(__ELF__)) \
! 176: && !defined(DOS4GW)
! 177: /* I386 code, generic code does not appear to work */
! 178: /* It does appear to work under OS2, and asms dont */
! 179: /* This is used for some 38g UNIX variants and for CYGWIN32 */
! 180: asm("pushl %eax"); asm("call _GC_push_one"); asm("addl $4,%esp");
! 181: asm("pushl %ecx"); asm("call _GC_push_one"); asm("addl $4,%esp");
! 182: asm("pushl %edx"); asm("call _GC_push_one"); asm("addl $4,%esp");
! 183: asm("pushl %ebp"); asm("call _GC_push_one"); asm("addl $4,%esp");
! 184: asm("pushl %esi"); asm("call _GC_push_one"); asm("addl $4,%esp");
! 185: asm("pushl %edi"); asm("call _GC_push_one"); asm("addl $4,%esp");
! 186: asm("pushl %ebx"); asm("call _GC_push_one"); asm("addl $4,%esp");
! 187: # endif
! 188:
! 189: # if ( defined(I386) && defined(LINUX) && defined(__ELF__) ) \
! 190: || ( defined(I386) && defined(__FreeBSD__) && defined(__ELF__) )
! 191:
! 192: /* This is modified for Linux with ELF (Note: _ELF_ only) */
! 193: /* This section handles FreeBSD with ELF. */
! 194: asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp");
! 195: asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp");
! 196: asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp");
! 197: asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp");
! 198: asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp");
! 199: asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp");
! 200: asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp");
! 201: # endif
! 202:
! 203: # if defined(I386) && defined(MSWIN32) && !defined(USE_GENERIC)
! 204: /* I386 code, Microsoft variant */
! 205: __asm push eax
! 206: __asm call GC_push_one
! 207: __asm add esp,4
! 208: __asm push ebx
! 209: __asm call GC_push_one
! 210: __asm add esp,4
! 211: __asm push ecx
! 212: __asm call GC_push_one
! 213: __asm add esp,4
! 214: __asm push edx
! 215: __asm call GC_push_one
! 216: __asm add esp,4
! 217: __asm push ebp
! 218: __asm call GC_push_one
! 219: __asm add esp,4
! 220: __asm push esi
! 221: __asm call GC_push_one
! 222: __asm add esp,4
! 223: __asm push edi
! 224: __asm call GC_push_one
! 225: __asm add esp,4
! 226: # endif
! 227:
! 228: # if defined(I386) && (defined(SVR4) || defined(SCO) || defined(SCO_ELF))
! 229: /* I386 code, SVR4 variant, generic code does not appear to work */
! 230: asm("pushl %eax"); asm("call GC_push_one"); asm("addl $4,%esp");
! 231: asm("pushl %ebx"); asm("call GC_push_one"); asm("addl $4,%esp");
! 232: asm("pushl %ecx"); asm("call GC_push_one"); asm("addl $4,%esp");
! 233: asm("pushl %edx"); asm("call GC_push_one"); asm("addl $4,%esp");
! 234: asm("pushl %ebp"); asm("call GC_push_one"); asm("addl $4,%esp");
! 235: asm("pushl %esi"); asm("call GC_push_one"); asm("addl $4,%esp");
! 236: asm("pushl %edi"); asm("call GC_push_one"); asm("addl $4,%esp");
! 237: # endif
! 238:
! 239: # ifdef NS32K
! 240: asm ("movd r3, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
! 241: asm ("movd r4, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
! 242: asm ("movd r5, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
! 243: asm ("movd r6, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
! 244: asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
! 245: # endif
! 246:
! 247: # ifdef SPARC
! 248: {
! 249: word GC_save_regs_in_stack();
! 250:
! 251: /* generic code will not work */
! 252: (void)GC_save_regs_in_stack();
! 253: }
! 254: # endif
! 255:
! 256: # ifdef RT
! 257: GC_push_one(TMP_SP); /* GC_push_one from r11 */
! 258:
! 259: asm("cas r11, r6, r0"); GC_push_one(TMP_SP); /* r6 */
! 260: asm("cas r11, r7, r0"); GC_push_one(TMP_SP); /* through */
! 261: asm("cas r11, r8, r0"); GC_push_one(TMP_SP); /* r10 */
! 262: asm("cas r11, r9, r0"); GC_push_one(TMP_SP);
! 263: asm("cas r11, r10, r0"); GC_push_one(TMP_SP);
! 264:
! 265: asm("cas r11, r12, r0"); GC_push_one(TMP_SP); /* r12 */
! 266: asm("cas r11, r13, r0"); GC_push_one(TMP_SP); /* through */
! 267: asm("cas r11, r14, r0"); GC_push_one(TMP_SP); /* r15 */
! 268: asm("cas r11, r15, r0"); GC_push_one(TMP_SP);
! 269: # endif
! 270:
! 271: # if defined(M68K) && defined(SYSV)
! 272: /* Once again similar to SUN and HP, though setjmp appears to work.
! 273: --Parag
! 274: */
! 275: # ifdef __GNUC__
! 276: asm("subqw #0x4,%sp"); /* allocate word on top of stack */
! 277:
! 278: asm("movl %a2,%sp@"); asm("jbsr GC_push_one");
! 279: asm("movl %a3,%sp@"); asm("jbsr GC_push_one");
! 280: asm("movl %a4,%sp@"); asm("jbsr GC_push_one");
! 281: asm("movl %a5,%sp@"); asm("jbsr GC_push_one");
! 282: /* Skip frame pointer and stack pointer */
! 283: asm("movl %d1,%sp@"); asm("jbsr GC_push_one");
! 284: asm("movl %d2,%sp@"); asm("jbsr GC_push_one");
! 285: asm("movl %d3,%sp@"); asm("jbsr GC_push_one");
! 286: asm("movl %d4,%sp@"); asm("jbsr GC_push_one");
! 287: asm("movl %d5,%sp@"); asm("jbsr GC_push_one");
! 288: asm("movl %d6,%sp@"); asm("jbsr GC_push_one");
! 289: asm("movl %d7,%sp@"); asm("jbsr GC_push_one");
! 290:
! 291: asm("addqw #0x4,%sp"); /* put stack back where it was */
! 292: # else /* !__GNUC__*/
! 293: asm("subq.w &0x4,%sp"); /* allocate word on top of stack */
! 294:
! 295: asm("mov.l %a2,(%sp)"); asm("jsr GC_push_one");
! 296: asm("mov.l %a3,(%sp)"); asm("jsr GC_push_one");
! 297: asm("mov.l %a4,(%sp)"); asm("jsr GC_push_one");
! 298: asm("mov.l %a5,(%sp)"); asm("jsr GC_push_one");
! 299: /* Skip frame pointer and stack pointer */
! 300: asm("mov.l %d1,(%sp)"); asm("jsr GC_push_one");
! 301: asm("mov.l %d2,(%sp)"); asm("jsr GC_push_one");
! 302: asm("mov.l %d3,(%sp)"); asm("jsr GC_push_one");
! 303: asm("mov.l %d4,(%sp)"); asm("jsr GC_push_one");
! 304: asm("mov.l %d5,(%sp)"); asm("jsr GC_push_one");
! 305: asm("mov.l %d6,(%sp)"); asm("jsr GC_push_one");
! 306: asm("mov.l %d7,(%sp)"); asm("jsr GC_push_one");
! 307:
! 308: asm("addq.w &0x4,%sp"); /* put stack back where it was */
! 309: # endif /* !__GNUC__ */
! 310: # endif /* M68K/SYSV */
! 311:
! 312:
! 313: /* other machines... */
! 314: # if !(defined M68K) && !(defined VAX) && !(defined RT)
! 315: # if !(defined SPARC) && !(defined I386) && !(defined NS32K)
! 316: # if !defined(POWERPC) && !defined(UTS4)
! 317: --> bad news <--
! 318: # endif
! 319: # endif
! 320: # endif
! 321: }
! 322: #endif /* !USE_GENERIC_PUSH_REGS */
! 323:
! 324: #if defined(USE_GENERIC_PUSH_REGS)
! 325: void GC_generic_push_regs(cold_gc_frame)
! 326: ptr_t cold_gc_frame;
! 327: {
! 328: /* Generic code */
! 329: /* The idea is due to Parag Patel at HP. */
! 330: /* We're not sure whether he would like */
! 331: /* to be he acknowledged for it or not. */
! 332: {
! 333: static jmp_buf regs;
! 334: register word * i = (word *) regs;
! 335: register ptr_t lim = (ptr_t)(regs) + (sizeof regs);
! 336:
! 337: /* Setjmp on Sun 3s doesn't clear all of the buffer. */
! 338: /* That tends to preserve garbage. Clear it. */
! 339: for (; (char *)i < lim; i++) {
! 340: *i = 0;
! 341: }
! 342: # if defined(POWERPC) || defined(MSWIN32) || defined(UTS4)
! 343: (void) setjmp(regs);
! 344: # else
! 345: (void) _setjmp(regs);
! 346: # endif
! 347: GC_push_current_stack(cold_gc_frame);
! 348: }
! 349: }
! 350: #endif /* USE_GENERIC_PUSH_REGS */
! 351:
! 352: /* On register window machines, we need a way to force registers into */
! 353: /* the stack. Return sp. */
! 354: # ifdef SPARC
! 355: asm(" .seg \"text\"");
! 356: # ifdef SVR4
! 357: asm(" .globl GC_save_regs_in_stack");
! 358: asm("GC_save_regs_in_stack:");
! 359: asm(" .type GC_save_regs_in_stack,#function");
! 360: # else
! 361: asm(" .globl _GC_save_regs_in_stack");
! 362: asm("_GC_save_regs_in_stack:");
! 363: # endif
! 364: asm(" ta 0x3 ! ST_FLUSH_WINDOWS");
! 365: asm(" mov %sp,%o0");
! 366: asm(" retl");
! 367: asm(" nop");
! 368: # ifdef SVR4
! 369: asm(" .GC_save_regs_in_stack_end:");
! 370: asm(" .size GC_save_regs_in_stack,.GC_save_regs_in_stack_end-GC_save_regs_in_stack");
! 371: # endif
! 372: # ifdef LINT
! 373: word GC_save_regs_in_stack() { return(0 /* sp really */);}
! 374: # endif
! 375: # endif
! 376:
! 377:
! 378: /* GC_clear_stack_inner(arg, limit) clears stack area up to limit and */
! 379: /* returns arg. Stack clearing is crucial on SPARC, so we supply */
! 380: /* an assembly version that's more careful. Assumes limit is hotter */
! 381: /* than sp, and limit is 8 byte aligned. */
! 382: #if defined(ASM_CLEAR_CODE) && !defined(THREADS)
! 383: #ifndef SPARC
! 384: --> fix it
! 385: #endif
! 386: # ifdef SUNOS4
! 387: asm(".globl _GC_clear_stack_inner");
! 388: asm("_GC_clear_stack_inner:");
! 389: # else
! 390: asm(".globl GC_clear_stack_inner");
! 391: asm("GC_clear_stack_inner:");
! 392: asm(".type GC_save_regs_in_stack,#function");
! 393: # endif
! 394: asm("mov %sp,%o2"); /* Save sp */
! 395: asm("add %sp,-8,%o3"); /* p = sp-8 */
! 396: asm("clr %g1"); /* [g0,g1] = 0 */
! 397: asm("add %o1,-0x60,%sp"); /* Move sp out of the way, */
! 398: /* so that traps still work. */
! 399: /* Includes some extra words */
! 400: /* so we can be sloppy below. */
! 401: asm("loop:");
! 402: asm("std %g0,[%o3]"); /* *(long long *)p = 0 */
! 403: asm("cmp %o3,%o1");
! 404: asm("bgu loop "); /* if (p > limit) goto loop */
! 405: asm("add %o3,-8,%o3"); /* p -= 8 (delay slot) */
! 406: asm("retl");
! 407: asm("mov %o2,%sp"); /* Restore sp., delay slot */
! 408: /* First argument = %o0 = return value */
! 409: # ifdef SVR4
! 410: asm(" .GC_clear_stack_inner_end:");
! 411: asm(" .size GC_clear_stack_inner,.GC_clear_stack_inner_end-GC_clear_stack_inner");
! 412: # endif
! 413:
! 414: # ifdef LINT
! 415: /*ARGSUSED*/
! 416: ptr_t GC_clear_stack_inner(arg, limit)
! 417: ptr_t arg; word limit;
! 418: { return(arg); }
! 419: # endif
! 420: #endif
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