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Diff for /OpenXM_contrib2/asir2000/gc/mach_dep.c between version 1.2 and 1.6

version 1.2, 2000/04/10 08:31:31 version 1.6, 2002/07/24 08:00:10
Line 12 
Line 12 
  * modified is included with the above copyright notice.   * modified is included with the above copyright notice.
  */   */
 /* Boehm, November 17, 1995 12:13 pm PST */  /* Boehm, November 17, 1995 12:13 pm PST */
 # include "gc_priv.h"  # include "private/gc_priv.h"
 # include <stdio.h>  # include <stdio.h>
 # include <setjmp.h>  # include <setjmp.h>
 # if defined(OS2) || defined(CX_UX)  # if defined(OS2) || defined(CX_UX)
Line 21 
Line 21 
 # endif  # endif
 # ifdef AMIGA  # ifdef AMIGA
 #   ifndef __GNUC__  #   ifndef __GNUC__
 #     include <dos/dos.h>  #     include <dos.h>
 #   else  #   else
 #     include <machine/reg.h>  #     include <machine/reg.h>
 #   endif  #   endif
Line 80  void GC_push_regs()
Line 80  void GC_push_regs()
 #       ifdef RT  #       ifdef RT
           register long TMP_SP; /* must be bound to r11 */            register long TMP_SP; /* must be bound to r11 */
 #       endif  #       endif
   
 #       ifdef VAX  #       ifdef VAX
           /* VAX - generic code below does not work under 4.2 */            /* VAX - generic code below does not work under 4.2 */
           /* r1 through r5 are caller save, and therefore     */            /* r1 through r5 are caller save, and therefore     */
Line 160  void GC_push_regs()
Line 161  void GC_push_regs()
 #        else /* !__GNUC__ */  #        else /* !__GNUC__ */
           GC_push_one(getreg(REG_A2));            GC_push_one(getreg(REG_A2));
           GC_push_one(getreg(REG_A3));            GC_push_one(getreg(REG_A3));
           GC_push_one(getreg(REG_A4));  #         ifndef __SASC
                 /* Can probably be changed to #if 0 -Kjetil M. (a4=globals)*/
               GC_push_one(getreg(REG_A4));
   #         endif
           GC_push_one(getreg(REG_A5));            GC_push_one(getreg(REG_A5));
           GC_push_one(getreg(REG_A6));            GC_push_one(getreg(REG_A6));
           /* Skip stack pointer */            /* Skip stack pointer */
Line 199  void GC_push_regs()
Line 203  void GC_push_regs()
 #       endif   /* __MWERKS__ */  #       endif   /* __MWERKS__ */
 #   endif       /* MACOS */  #   endif       /* MACOS */
   
 #       if defined(I386) &&!defined(OS2) &&!defined(SVR4) &&!defined(MSWIN32) \  #       if defined(I386) &&!defined(OS2) &&!defined(SVR4) \
           && (defined(__MINGW32__) || !defined(MSWIN32)) \
         && !defined(SCO) && !defined(SCO_ELF) \          && !defined(SCO) && !defined(SCO_ELF) \
         && !(defined(LINUX)       && defined(__ELF__)) \          && !(defined(LINUX) && defined(__ELF__)) \
         && !(defined(__FreeBSD__) && defined(__ELF__)) \          && !(defined(FREEBSD) && defined(__ELF__)) \
         && !defined(DOS4GW)          && !(defined(NETBSD) && defined(__ELF__)) \
           && !(defined(OPENBSD) && defined(__ELF__)) \
           && !(defined(BEOS) && defined(__ELF__)) \
           && !defined(DOS4GW) && !defined(HURD)
         /* I386 code, generic code does not appear to work */          /* I386 code, generic code does not appear to work */
         /* It does appear to work under OS2, and asms dont */          /* It does appear to work under OS2, and asms dont */
         /* This is used for some 38g UNIX variants and for CYGWIN32 */          /* This is used for some 38g UNIX variants and for CYGWIN32 */
Line 217  void GC_push_regs()
Line 225  void GC_push_regs()
 #       endif  #       endif
   
 #       if ( defined(I386) && defined(LINUX) && defined(__ELF__) ) \  #       if ( defined(I386) && defined(LINUX) && defined(__ELF__) ) \
         || ( defined(I386) && defined(__FreeBSD__) && defined(__ELF__) )          || ( defined(I386) && defined(FREEBSD) && defined(__ELF__) ) \
           || ( defined(I386) && defined(NETBSD) && defined(__ELF__) ) \
           || ( defined(I386) && defined(OPENBSD) && defined(__ELF__) ) \
           || ( defined(I386) && defined(HURD) && defined(__ELF__) ) \
           || ( defined(I386) && defined(DGUX) )
   
         /* This is modified for Linux with ELF (Note: _ELF_ only) */          /* This is modified for Linux with ELF (Note: _ELF_ only) */
         /* This section handles FreeBSD with ELF. */          /* This section handles FreeBSD with ELF. */
           asm("pushl %eax");  asm("call GC_push_one"); asm("addl $4,%esp");          /* Eax is caller-save and dead here.  Other caller-save         */
           asm("pushl %ecx");  asm("call GC_push_one"); asm("addl $4,%esp");          /* registers could also be skipped.  We assume there are no     */
           asm("pushl %edx");  asm("call GC_push_one"); asm("addl $4,%esp");          /* pointers in MMX registers, etc.                              */
           asm("pushl %ebp");  asm("call GC_push_one"); asm("addl $4,%esp");          /* We combine instructions in a single asm to prevent gcc from  */
           asm("pushl %esi");  asm("call GC_push_one"); asm("addl $4,%esp");          /* inserting code in the middle.                                */
           asm("pushl %edi");  asm("call GC_push_one"); asm("addl $4,%esp");            asm("pushl %ecx; call GC_push_one; addl $4,%esp");
           asm("pushl %ebx");  asm("call GC_push_one"); asm("addl $4,%esp");            asm("pushl %edx; call GC_push_one; addl $4,%esp");
             asm("pushl %ebp; call GC_push_one; addl $4,%esp");
             asm("pushl %esi; call GC_push_one; addl $4,%esp");
             asm("pushl %edi; call GC_push_one; addl $4,%esp");
             asm("pushl %ebx; call GC_push_one; addl $4,%esp");
 #       endif  #       endif
   
 #       if defined(I386) && defined(MSWIN32) && !defined(USE_GENERIC)  #       if ( defined(I386) && defined(BEOS) && defined(__ELF__) )
           /* As far as I can understand from                              */
           /* http://www.beunited.org/articles/jbq/nasm.shtml,             */
           /* only ebp, esi, edi and ebx are not scratch. How MMX          */
           /* etc. registers should be treated, I have no idea.            */
             asm("pushl %ebp; call GC_push_one; addl $4,%esp");
             asm("pushl %esi; call GC_push_one; addl $4,%esp");
             asm("pushl %edi; call GC_push_one; addl $4,%esp");
             asm("pushl %ebx; call GC_push_one; addl $4,%esp");
   #       endif
   
   #       if defined(I386) && defined(MSWIN32) && !defined(__MINGW32__) \
              && !defined(USE_GENERIC)
         /* I386 code, Microsoft variant         */          /* I386 code, Microsoft variant         */
           __asm  push eax            __asm  push eax
           __asm  call GC_push_one            __asm  call GC_push_one
Line 274  void GC_push_regs()
Line 302  void GC_push_regs()
           asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");            asm ("movd r7, tos"); asm ("bsr ?_GC_push_one"); asm ("adjspb $-4");
 #       endif  #       endif
   
 #       if defined(SPARC) || defined(IA64)  #       if defined(SPARC)
           {            {
               word GC_save_regs_in_stack();                word GC_save_regs_in_stack();
   
               /* generic code will not work */  
               GC_save_regs_ret_val = GC_save_regs_in_stack();                GC_save_regs_ret_val = GC_save_regs_in_stack();
           }            }
 #       endif  #       endif
Line 349  void GC_push_regs()
Line 376  void GC_push_regs()
 #     endif  #     endif
   
       /* other machines... */        /* other machines... */
 #       if !(defined M68K) && !(defined VAX) && !(defined RT)  #       if !defined(M68K) && !defined(VAX) && !defined(RT)
 #       if !(defined SPARC) && !(defined I386) && !(defined NS32K)  #       if !defined(SPARC) && !defined(I386) && !defined(NS32K)
 #       if !defined(POWERPC) && !defined(UTS4) && !defined(IA64)  #       if !defined(POWERPC) && !defined(UTS4)
 #       if !defined(PJ)  #       if !defined(PJ) && !(defined(MIPS) && defined(LINUX))
             --> bad news <--              --> bad news <--
 #       endif  #       endif
 #       endif  #       endif
Line 365  void GC_push_regs()
Line 392  void GC_push_regs()
 void GC_generic_push_regs(cold_gc_frame)  void GC_generic_push_regs(cold_gc_frame)
 ptr_t cold_gc_frame;  ptr_t cold_gc_frame;
 {  {
         /* Generic code                          */  
         /* The idea is due to Parag Patel at HP. */  
         /* We're not sure whether he would like  */  
         /* to be he acknowledged for it or not.  */  
         {          {
             static jmp_buf regs;  #           ifdef HAVE_BUILTIN_UNWIND_INIT
             register word * i = (word *) regs;                /* This was suggested by Richard Henderson as the way to  */
             register ptr_t lim = (ptr_t)(regs) + (sizeof regs);                /* force callee-save registers and register windows onto  */
                 /* the stack.                                             */
                 __builtin_unwind_init();
   #           else /* !HAVE_BUILTIN_UNWIND_INIT */
                 /* Generic code                          */
                 /* The idea is due to Parag Patel at HP. */
                 /* We're not sure whether he would like  */
                 /* to be he acknowledged for it or not.  */
                 jmp_buf regs;
                 register word * i = (word *) regs;
                 register ptr_t lim = (ptr_t)(regs) + (sizeof regs);
   
             /* Setjmp on Sun 3s doesn't clear all of the buffer.  */                /* Setjmp doesn't always clear all of the buffer.         */
             /* That tends to preserve garbage.  Clear it.         */                /* That tends to preserve garbage.  Clear it.             */
                 for (; (char *)i < lim; i++) {                  for (; (char *)i < lim; i++) {
                     *i = 0;                      *i = 0;
                 }                  }
 #           if defined(POWERPC) || defined(MSWIN32) || defined(UTS4)  #             if defined(POWERPC) || defined(MSWIN32) || defined(MSWINCE) \
                 (void) setjmp(regs);                  || defined(UTS4) || defined(LINUX) || defined(EWS4800)
 #           else                    (void) setjmp(regs);
                 (void) _setjmp(regs);  #             else
 #           endif                    (void) _setjmp(regs);
   #             endif
   #           endif /* !HAVE_BUILTIN_UNWIND_INIT */
   #           if (defined(SPARC) && !defined(HAVE_BUILTIN_UNWIND_INIT)) \
                   || defined(IA64)
                 /* On a register window machine, we need to save register */
                 /* contents on the stack for this to work.  The setjmp    */
                 /* is probably not needed on SPARC, since pointers are    */
                 /* only stored in windowed or scratch registers.  It is   */
                 /* needed on IA64, since some non-windowed registers are  */
                 /* preserved.                                             */
                 {
                   word GC_save_regs_in_stack();
   
                   GC_save_regs_ret_val = GC_save_regs_in_stack();
                   /* On IA64 gcc, could use __builtin_ia64_flushrs() and  */
                   /* __builtin_ia64_flushrs().  The latter will be done   */
                   /* implicitly by __builtin_unwind_init() for gcc3.0.1   */
                   /* and later.                                           */
                 }
   #           endif
             GC_push_current_stack(cold_gc_frame);              GC_push_current_stack(cold_gc_frame);
         }          }
 }  }
Line 401  ptr_t cold_gc_frame;
Line 454  ptr_t cold_gc_frame;
       asm("     .globl  _GC_save_regs_in_stack");        asm("     .globl  _GC_save_regs_in_stack");
       asm("_GC_save_regs_in_stack:");        asm("_GC_save_regs_in_stack:");
 #   endif  #   endif
     asm("       ta      0x3   ! ST_FLUSH_WINDOWS");  #   if defined(__arch64__) || defined(__sparcv9)
     asm("       mov     %sp,%o0");        asm("     save    %sp,-128,%sp");
     asm("       retl");        asm("     flushw");
     asm("       nop");        asm("     ret");
         asm("     restore %sp,2047+128,%o0");
   #   else
         asm("     ta      0x3   ! ST_FLUSH_WINDOWS");
         asm("     retl");
         asm("     mov     %sp,%o0");
   #   endif
 #   ifdef SVR4  #   ifdef SVR4
       asm("     .GC_save_regs_in_stack_end:");        asm("     .GC_save_regs_in_stack_end:");
       asm("     .size GC_save_regs_in_stack,.GC_save_regs_in_stack_end-GC_save_regs_in_stack");        asm("     .size GC_save_regs_in_stack,.GC_save_regs_in_stack_end-GC_save_regs_in_stack");
Line 417  ptr_t cold_gc_frame;
Line 476  ptr_t cold_gc_frame;
 /* On IA64, we also need to flush register windows.  But they end       */  /* On IA64, we also need to flush register windows.  But they end       */
 /* up on the other side of the stack segment.                           */  /* up on the other side of the stack segment.                           */
 /* Returns the backing store pointer for the register stack.            */  /* Returns the backing store pointer for the register stack.            */
 # ifdef IA64  /* We now implement this as a separate assembly file, since inline      */
   /* assembly code here doesn't work with either the Intel or HP          */
   /* compilers.                                                           */
   # if 0
   #   ifdef LINUX
         asm("        .text");          asm("        .text");
         asm("        .psr abi64");          asm("        .psr abi64");
         asm("        .psr lsb");          asm("        .psr lsb");
Line 434  ptr_t cold_gc_frame;
Line 497  ptr_t cold_gc_frame;
         asm("        mov r8=ar.bsp");          asm("        mov r8=ar.bsp");
         asm("        br.ret.sptk.few rp");          asm("        br.ret.sptk.few rp");
         asm("        .endp GC_save_regs_in_stack");          asm("        .endp GC_save_regs_in_stack");
   #   endif /* LINUX */
   #   if 0 /* Other alternatives that don't work on HP/UX */
           word GC_save_regs_in_stack() {
   #         if USE_BUILTINS
               __builtin_ia64_flushrs();
               return __builtin_ia64_bsp();
   #         else
   #           ifdef HPUX
                 _asm("        flushrs");
                 _asm("        ;;");
                 _asm("        mov r8=ar.bsp");
                 _asm("        br.ret.sptk.few rp");
   #           else
                 asm("        flushrs");
                 asm("        ;;");
                 asm("        mov r8=ar.bsp");
                 asm("        br.ret.sptk.few rp");
   #           endif
   #         endif
           }
   #   endif
 # endif  # endif
   
 /* GC_clear_stack_inner(arg, limit) clears stack area up to limit and   */  /* GC_clear_stack_inner(arg, limit) clears stack area up to limit and   */
 /* returns arg.  Stack clearing is crucial on SPARC, so we supply       */  /* returns arg.  Stack clearing is crucial on SPARC, so we supply       */
 /* an assembly version that's more careful.  Assumes limit is hotter    */  /* an assembly version that's more careful.  Assumes limit is hotter    */
 /* than sp, and limit is 8 byte aligned.                                */  /* than sp, and limit is 8 byte aligned.                                */
 #if defined(ASM_CLEAR_CODE) && !defined(THREADS)  #if defined(ASM_CLEAR_CODE)
 #ifndef SPARC  #ifndef SPARC
         --> fix it          --> fix it
 #endif  #endif
Line 452  ptr_t cold_gc_frame;
Line 536  ptr_t cold_gc_frame;
     asm("GC_clear_stack_inner:");      asm("GC_clear_stack_inner:");
     asm(".type GC_save_regs_in_stack,#function");      asm(".type GC_save_regs_in_stack,#function");
 # endif  # endif
   #if defined(__arch64__) || defined(__sparcv9)
     asm("mov %sp,%o2");           /* Save sp                      */
     asm("add %sp,2047-8,%o3");    /* p = sp+bias-8                */
     asm("add %o1,-2047-192,%sp"); /* Move sp out of the way,      */
                                   /* so that traps still work.    */
                                   /* Includes some extra words    */
                                   /* so we can be sloppy below.   */
     asm("loop:");
     asm("stx %g0,[%o3]");         /* *(long *)p = 0               */
     asm("cmp %o3,%o1");
     asm("bgu,pt %xcc, loop");     /* if (p > limit) goto loop     */
       asm("add %o3,-8,%o3");      /* p -= 8 (delay slot) */
     asm("retl");
       asm("mov %o2,%sp");         /* Restore sp., delay slot      */
   #else
   asm("mov %sp,%o2");           /* Save sp      */    asm("mov %sp,%o2");           /* Save sp      */
   asm("add %sp,-8,%o3");        /* p = sp-8     */    asm("add %sp,-8,%o3");        /* p = sp-8     */
   asm("clr %g1");               /* [g0,g1] = 0  */    asm("clr %g1");               /* [g0,g1] = 0  */
Line 466  ptr_t cold_gc_frame;
Line 565  ptr_t cold_gc_frame;
     asm("add %o3,-8,%o3");      /* p -= 8 (delay slot) */      asm("add %o3,-8,%o3");      /* p -= 8 (delay slot) */
   asm("retl");    asm("retl");
     asm("mov %o2,%sp");         /* Restore sp., delay slot      */      asm("mov %o2,%sp");         /* Restore sp., delay slot      */
   #endif /* old SPARC */
   /* First argument = %o0 = return value */    /* First argument = %o0 = return value */
 #   ifdef SVR4  #   ifdef SVR4
       asm("     .GC_clear_stack_inner_end:");        asm("     .GC_clear_stack_inner_end:");
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