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-/*
- * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
- * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
- * Copyright (c) 1996 by Silicon Graphics. All rights reserved.
- *
- * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
- * OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
- *
- * Permission is hereby granted to use or copy this program
- * for any purpose, provided the above notices are retained on all copies.
- * Permission to modify the code and to distribute modified code is granted,
- * provided the above notices are retained, and a notice that the code was
- * modified is included with the above copyright notice.
- */
-
-#ifndef GCCONFIG_H
-
-# define GCCONFIG_H
-
-/* Machine dependent parameters. Some tuning parameters can be found */
-/* near the top of gc_private.h. */
-
-/* Machine specific parts contributed by various people. See README file. */
-
-/* First a unified test for Linux: */
-# if defined(linux) || defined(__linux__)
-# define LINUX
-# endif
-
-/* Determine the machine type: */
-# if defined(sun) && defined(mc68000)
-# define M68K
-# define SUNOS4
-# define mach_type_known
-# endif
-# if defined(hp9000s300)
-# define M68K
-# define HP
-# define mach_type_known
-# endif
-# if defined(__OpenBSD__) && defined(m68k)
-# define M68K
-# define OPENBSD
-# define mach_type_known
-# endif
-# if defined(__OpenBSD__) && defined(__sparc__)
-# define SPARC
-# define OPENBSD
-# define mach_type_known
-# endif
-# if defined(__NetBSD__) && defined(m68k)
-# define M68K
-# define NETBSD
-# define mach_type_known
-# endif
-# if defined(__NetBSD__) && defined(arm32)
-# define ARM32
-# define NETBSD
-# define mach_type_known
-# endif
-# if defined(vax)
-# define VAX
-# ifdef ultrix
-# define ULTRIX
-# else
-# define BSD
-# endif
-# define mach_type_known
-# endif
-# if defined(mips) || defined(__mips)
-# define MIPS
-# if !defined(LINUX)
-# if defined(ultrix) || defined(__ultrix) || defined(__NetBSD__)
-# define ULTRIX
-# else
-# if defined(_SYSTYPE_SVR4) || defined(SYSTYPE_SVR4) \
- || defined(__SYSTYPE_SVR4__)
-# define IRIX5 /* or IRIX 6.X */
-# else
-# define RISCOS /* or IRIX 4.X */
-# endif
-# endif
-# endif /* !LINUX */
-# define mach_type_known
-# endif
-# if defined(sequent) && defined(i386)
-# define I386
-# define SEQUENT
-# define mach_type_known
-# endif
-# if defined(sun) && defined(i386)
-# define I386
-# define SUNOS5
-# define mach_type_known
-# endif
-# if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__)
-# define I386
-# define OS2
-# define mach_type_known
-# endif
-# if defined(ibm032)
-# define RT
-# define mach_type_known
-# endif
-# if defined(sun) && (defined(sparc) || defined(__sparc))
-# define SPARC
- /* Test for SunOS 5.x */
-# include <errno.h>
-# ifdef ECHRNG
-# define SUNOS5
-# else
-# define SUNOS4
-# endif
-# define mach_type_known
-# endif
-# if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \
- && !defined(__OpenBSD__)
-# define SPARC
-# define DRSNX
-# define mach_type_known
-# endif
-# if defined(_IBMR2)
-# define RS6000
-# define mach_type_known
-# endif
-# if defined(_M_XENIX) && defined(_M_SYSV) && defined(_M_I386)
- /* The above test may need refinement */
-# define I386
-# if defined(_SCO_ELF)
-# define SCO_ELF
-# else
-# define SCO
-# endif
-# define mach_type_known
-# endif
-# if defined(_AUX_SOURCE)
-# define M68K
-# define SYSV
-# define mach_type_known
-# endif
-# if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \
- || defined(hppa) || defined(__hppa__)
-# define HP_PA
-# ifndef LINUX
-# define HPUX
-# endif
-# define mach_type_known
-# endif
-# if defined(LINUX) && (defined(i386) || defined(__i386__))
-# define I386
-# define mach_type_known
-# endif
-# if defined(LINUX) && (defined(__ia64__) || defined(__ia64))
-# define IA64
-# define mach_type_known
-# endif
-# if defined(LINUX) && defined(powerpc)
-# define POWERPC
-# define mach_type_known
-# endif
-# if defined(LINUX) && defined(__mc68000__)
-# define M68K
-# define mach_type_known
-# endif
-# if defined(LINUX) && (defined(sparc) || defined(__sparc__))
-# define SPARC
-# define mach_type_known
-# endif
-# if defined(LINUX) && defined(arm)
-# define ARM32
-# define mach_type_known
-# endif
-# if defined(__alpha) || defined(__alpha__)
-# define ALPHA
-# if !defined(LINUX)
-# define OSF1 /* a.k.a Digital Unix */
-# endif
-# define mach_type_known
-# endif
-# if defined(_AMIGA) && !defined(AMIGA)
-# define AMIGA
-# endif
-# ifdef AMIGA
-# define M68K
-# define mach_type_known
-# endif
-# if defined(THINK_C) || defined(__MWERKS__) && !defined(__powerc)
-# define M68K
-# define MACOS
-# define mach_type_known
-# endif
-# if defined(__MWERKS__) && defined(__powerc)
-# define POWERPC
-# define MACOS
-# define mach_type_known
-# endif
-# if defined(macosx)
-# define MACOSX
-# define POWERPC
-# define mach_type_known
-# endif
-# if defined(NeXT) && defined(mc68000)
-# define M68K
-# define NEXT
-# define mach_type_known
-# endif
-# if defined(NeXT) && defined(i386)
-# define I386
-# define NEXT
-# define mach_type_known
-# endif
-# if defined(__OpenBSD__) && defined(i386)
-# define I386
-# define OPENBSD
-# define mach_type_known
-# endif
-# if defined(__FreeBSD__) && defined(i386)
-# define I386
-# define FREEBSD
-# define mach_type_known
-# endif
-# if defined(__NetBSD__) && defined(i386)
-# define I386
-# define NETBSD
-# define mach_type_known
-# endif
-# if defined(bsdi) && defined(i386)
-# define I386
-# define BSDI
-# define mach_type_known
-# endif
-# if !defined(mach_type_known) && defined(__386BSD__)
-# define I386
-# define THREE86BSD
-# define mach_type_known
-# endif
-# if defined(_CX_UX) && defined(_M88K)
-# define M88K
-# define CX_UX
-# define mach_type_known
-# endif
-# if defined(DGUX)
-# define M88K
- /* DGUX defined */
-# define mach_type_known
-# endif
-# if (defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300) \
- || defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)
-# define I386
-# define MSWIN32 /* or Win32s */
-# define mach_type_known
-# endif
-# if defined(__DJGPP__)
-# define I386
-# ifndef DJGPP
-# define DJGPP /* MSDOS running the DJGPP port of GCC */
-# endif
-# define mach_type_known
-# endif
-# if defined(__CYGWIN32__) || defined(__CYGWIN__)
-# define I386
-# define CYGWIN32
-# define mach_type_known
-# endif
-# if defined(__MINGW32__)
-# define I386
-# define MSWIN32
-# define mach_type_known
-# endif
-# if defined(__BORLANDC__)
-# define I386
-# define MSWIN32
-# define mach_type_known
-# endif
-# if defined(_UTS) && !defined(mach_type_known)
-# define S370
-# define UTS4
-# define mach_type_known
-# endif
-# if defined(__pj__)
-# define PJ
-# define mach_type_known
-# endif
-/* Ivan Demakov */
-# if defined(__WATCOMC__) && defined(__386__)
-# define I386
-# if !defined(OS2) && !defined(MSWIN32) && !defined(DOS4GW)
-# if defined(__OS2__)
-# define OS2
-# else
-# if defined(__WINDOWS_386__) || defined(__NT__)
-# define MSWIN32
-# else
-# define DOS4GW
-# endif
-# endif
-# endif
-# define mach_type_known
-# endif
-
-/* Feel free to add more clauses here */
-
-/* Or manually define the machine type here. A machine type is */
-/* characterized by the architecture. Some */
-/* machine types are further subdivided by OS. */
-/* the macros ULTRIX, RISCOS, and BSD to distinguish. */
-/* Note that SGI IRIX is treated identically to RISCOS. */
-/* SYSV on an M68K actually means A/UX. */
-/* The distinction in these cases is usually the stack starting address */
-# ifndef mach_type_known
- --> unknown machine type
-# endif
- /* Mapping is: M68K ==> Motorola 680X0 */
- /* (SUNOS4,HP,NEXT, and SYSV (A/UX), */
- /* MACOS and AMIGA variants) */
- /* I386 ==> Intel 386 */
- /* (SEQUENT, OS2, SCO, LINUX, NETBSD, */
- /* FREEBSD, THREE86BSD, MSWIN32, */
- /* BSDI,SUNOS5, NEXT, other variants) */
- /* NS32K ==> Encore Multimax */
- /* MIPS ==> R2000 or R3000 */
- /* (RISCOS, ULTRIX variants) */
- /* VAX ==> DEC VAX */
- /* (BSD, ULTRIX variants) */
- /* RS6000 ==> IBM RS/6000 AIX3.X */
- /* RT ==> IBM PC/RT */
- /* HP_PA ==> HP9000/700 & /800 */
- /* HP/UX */
- /* SPARC ==> SPARC under SunOS */
- /* (SUNOS4, SUNOS5, */
- /* DRSNX variants) */
- /* ALPHA ==> DEC Alpha */
- /* (OSF1 and LINUX variants) */
- /* M88K ==> Motorola 88XX0 */
- /* (CX_UX and DGUX) */
- /* S370 ==> 370-like machine */
- /* running Amdahl UTS4 */
- /* ARM32 ==> Intel StrongARM */
- /* IA64 ==> Intel IA64 */
- /* (e.g. Itanium) */
-
-
-/*
- * For each architecture and OS, the following need to be defined:
- *
- * CPP_WORD_SZ is a simple integer constant representing the word size.
- * in bits. We assume byte addressibility, where a byte has 8 bits.
- * We also assume CPP_WORD_SZ is either 32 or 64.
- * (We care about the length of pointers, not hardware
- * bus widths. Thus a 64 bit processor with a C compiler that uses
- * 32 bit pointers should use CPP_WORD_SZ of 32, not 64. Default is 32.)
- *
- * MACH_TYPE is a string representation of the machine type.
- * OS_TYPE is analogous for the OS.
- *
- * ALIGNMENT is the largest N, such that
- * all pointer are guaranteed to be aligned on N byte boundaries.
- * defining it to be 1 will always work, but perform poorly.
- *
- * DATASTART is the beginning of the data segment.
- * On UNIX systems, the collector will scan the area between DATASTART
- * and DATAEND for root pointers.
- *
- * DATAEND, if not &end.
- *
- * ALIGN_DOUBLE of GC_malloc should return blocks aligned to twice
- * the pointer size.
- *
- * STACKBOTTOM is the cool end of the stack, which is usually the
- * highest address in the stack.
- * Under PCR or OS/2, we have other ways of finding thread stacks.
- * For each machine, the following should:
- * 1) define STACK_GROWS_UP if the stack grows toward higher addresses, and
- * 2) define exactly one of
- * STACKBOTTOM (should be defined to be an expression)
- * HEURISTIC1
- * HEURISTIC2
- * If either of the last two macros are defined, then STACKBOTTOM is computed
- * during collector startup using one of the following two heuristics:
- * HEURISTIC1: Take an address inside GC_init's frame, and round it up to
- * the next multiple of STACK_GRAN.
- * HEURISTIC2: Take an address inside GC_init's frame, increment it repeatedly
- * in small steps (decrement if STACK_GROWS_UP), and read the value
- * at each location. Remember the value when the first
- * Segmentation violation or Bus error is signalled. Round that
- * to the nearest plausible page boundary, and use that instead
- * of STACKBOTTOM.
- *
- * Gustavo Rodriguez-Rivera points out that on most (all?) Unix machines,
- * the value of environ is a pointer that can serve as STACKBOTTOM.
- * I expect that HEURISTIC2 can be replaced by this approach, which
- * interferes far less with debugging.
- *
- * If no expression for STACKBOTTOM can be found, and neither of the above
- * heuristics are usable, the collector can still be used with all of the above
- * undefined, provided one of the following is done:
- * 1) GC_mark_roots can be changed to somehow mark from the correct stack(s)
- * without reference to STACKBOTTOM. This is appropriate for use in
- * conjunction with thread packages, since there will be multiple stacks.
- * (Allocating thread stacks in the heap, and treating them as ordinary
- * heap data objects is also possible as a last resort. However, this is
- * likely to introduce significant amounts of excess storage retention
- * unless the dead parts of the thread stacks are periodically cleared.)
- * 2) Client code may set GC_stackbottom before calling any GC_ routines.
- * If the author of the client code controls the main program, this is
- * easily accomplished by introducing a new main program, setting
- * GC_stackbottom to the address of a local variable, and then calling
- * the original main program. The new main program would read something
- * like:
- *
- * # include "gc_private.h"
- *
- * main(argc, argv, envp)
- * int argc;
- * char **argv, **envp;
- * {
- * int dummy;
- *
- * GC_stackbottom = (ptr_t)(&dummy);
- * return(real_main(argc, argv, envp));
- * }
- *
- *
- * Each architecture may also define the style of virtual dirty bit
- * implementation to be used:
- * MPROTECT_VDB: Write protect the heap and catch faults.
- * PROC_VDB: Use the SVR4 /proc primitives to read dirty bits.
- *
- * An architecture may define DYNAMIC_LOADING if dynamic_load.c
- * defined GC_register_dynamic_libraries() for the architecture.
- *
- * An architecture may define PREFETCH(x) to preload the cache with *x.
- * This defaults to a no-op.
- *
- * PREFETCH_FOR_WRITE(x) is used if *x is about to be written.
- *
- * An architecture may also define CLEAR_DOUBLE(x) to be a fast way to
- * clear the two words at GC_malloc-aligned address x. By default,
- * word stores of 0 are used instead.
- */
-
-
-# define STACK_GRAN 0x1000000
-# ifdef M68K
-# define MACH_TYPE "M68K"
-# define ALIGNMENT 2
-# ifdef OPENBSD
-# define OS_TYPE "OPENBSD"
-# define HEURISTIC2
- extern char etext;
-# define DATASTART ((ptr_t)(&etext))
-# endif
-# ifdef NETBSD
-# define OS_TYPE "NETBSD"
-# define HEURISTIC2
- extern char etext;
-# define DATASTART ((ptr_t)(&etext))
-# endif
-# ifdef LINUX
-# define OS_TYPE "LINUX"
-# define STACKBOTTOM ((ptr_t)0xf0000000)
-# define MPROTECT_VDB
-# ifdef __ELF__
-# define DYNAMIC_LOADING
- extern char **__environ;
-# define DATASTART ((ptr_t)(&__environ))
- /* hideous kludge: __environ is the first */
- /* word in crt0.o, and delimits the start */
- /* of the data segment, no matter which */
- /* ld options were passed through. */
- /* We could use _etext instead, but that */
- /* would include .rodata, which may */
- /* contain large read-only data tables */
- /* that we'd rather not scan. */
- extern int _end;
-# define DATAEND (&_end)
-# else
- extern int etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
-# endif
-# endif
-# ifdef SUNOS4
-# define OS_TYPE "SUNOS4"
- extern char etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ffff) & ~0x1ffff))
-# define HEURISTIC1 /* differs */
-# define DYNAMIC_LOADING
-# endif
-# ifdef HP
-# define OS_TYPE "HP"
- extern char etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
-# define STACKBOTTOM ((ptr_t) 0xffeffffc)
- /* empirically determined. seems to work. */
-# include <unistd.h>
-# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
-# endif
-# ifdef SYSV
-# define OS_TYPE "SYSV"
- extern etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \
- & ~0x3fffff) \
- +((word)&etext & 0x1fff))
- /* This only works for shared-text binaries with magic number 0413.
- The other sorts of SysV binaries put the data at the end of the text,
- in which case the default of &etext would work. Unfortunately,
- handling both would require having the magic-number available.
- -- Parag
- */
-# define STACKBOTTOM ((ptr_t)0xFFFFFFFE)
- /* The stack starts at the top of memory, but */
- /* 0x0 cannot be used as setjump_test complains */
- /* that the stack direction is incorrect. Two */
- /* bytes down from 0x0 should be safe enough. */
- /* --Parag */
-# include <sys/mmu.h>
-# define GETPAGESIZE() PAGESIZE /* Is this still right? */
-# endif
-# ifdef AMIGA
-# define OS_TYPE "AMIGA"
- /* STACKBOTTOM and DATASTART handled specially */
- /* in os_dep.c */
-# define DATAEND /* not needed */
-# define GETPAGESIZE() 4096
-# endif
-# ifdef MACOS
-# ifndef __LOWMEM__
-# include <LowMem.h>
-# endif
-# define OS_TYPE "MACOS"
- /* see os_dep.c for details of global data segments. */
-# define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
-# define DATAEND /* not needed */
-# define GETPAGESIZE() 4096
-# endif
-# ifdef NEXT
-# define OS_TYPE "NEXT"
-# define DATASTART ((ptr_t) get_etext())
-# define STACKBOTTOM ((ptr_t) 0x4000000)
-# define DATAEND /* not needed */
-# endif
-# endif
-
-# ifdef POWERPC
-# define MACH_TYPE "POWERPC"
-# ifdef MACOS
-# define ALIGNMENT 2 /* Still necessary? Could it be 4? */
-# ifndef __LOWMEM__
-# include <LowMem.h>
-# endif
-# define OS_TYPE "MACOS"
- /* see os_dep.c for details of global data segments. */
-# define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
-# define DATAEND /* not needed */
-# endif
-# ifdef LINUX
-# define ALIGNMENT 4 /* Guess. Can someone verify? */
- /* This was 2, but that didn't sound right. */
-# define OS_TYPE "LINUX"
-# define HEURISTIC1
-# define DYNAMIC_LOADING
-# undef STACK_GRAN
-# define STACK_GRAN 0x10000000
- /* Stack usually starts at 0x80000000 */
-# define LINUX_DATA_START
- extern int _end;
-# define DATAEND (&_end)
-# endif
-# ifdef MACOSX
-# define ALIGNMENT 4
-# define OS_TYPE "MACOSX"
-# define DATASTART ((ptr_t) get_etext())
-# define STACKBOTTOM ((ptr_t) 0xc0000000)
-# define DATAEND /* not needed */
-# endif
-# endif
-
-# ifdef VAX
-# define MACH_TYPE "VAX"
-# define ALIGNMENT 4 /* Pointers are longword aligned by 4.2 C compiler */
- extern char etext;
-# define DATASTART ((ptr_t)(&etext))
-# ifdef BSD
-# define OS_TYPE "BSD"
-# define HEURISTIC1
- /* HEURISTIC2 may be OK, but it's hard to test. */
-# endif
-# ifdef ULTRIX
-# define OS_TYPE "ULTRIX"
-# define STACKBOTTOM ((ptr_t) 0x7fffc800)
-# endif
-# endif
-
-# ifdef RT
-# define MACH_TYPE "RT"
-# define ALIGNMENT 4
-# define DATASTART ((ptr_t) 0x10000000)
-# define STACKBOTTOM ((ptr_t) 0x1fffd800)
-# endif
-
-# ifdef SPARC
-# define MACH_TYPE "SPARC"
-# define ALIGNMENT 4 /* Required by hardware */
-# define ALIGN_DOUBLE
- extern int etext;
-# ifdef SUNOS5
-# define OS_TYPE "SUNOS5"
- extern int _etext;
- extern int _end;
- extern char * GC_SysVGetDataStart();
-# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext)
-# define DATAEND (&_end)
-# ifndef USE_MMAP
-# define USE_MMAP
-# endif
-# ifdef USE_MMAP
-# define HEAP_START (ptr_t)0x40000000
-# else
-# define HEAP_START DATAEND
-# endif
-# define PROC_VDB
-/* HEURISTIC1 reportedly no longer works under 2.7. Thus we */
-/* switched to HEURISTIC2, eventhough it creates some debugging */
-/* issues. */
-# define HEURISTIC2
-# include <unistd.h>
-# define GETPAGESIZE() sysconf(_SC_PAGESIZE)
- /* getpagesize() appeared to be missing from at least one */
- /* Solaris 5.4 installation. Weird. */
-# define DYNAMIC_LOADING
-# endif
-# ifdef SUNOS4
-# define OS_TYPE "SUNOS4"
- /* [If you have a weak stomach, don't read this.] */
- /* We would like to use: */
-/* # define DATASTART ((ptr_t)((((word) (&etext)) + 0x1fff) & ~0x1fff)) */
- /* This fails occasionally, due to an ancient, but very */
- /* persistent ld bug. &etext is set 32 bytes too high. */
- /* We instead read the text segment size from the a.out */
- /* header, which happens to be mapped into our address space */
- /* at the start of the text segment. The detective work here */
- /* was done by Robert Ehrlich, Manuel Serrano, and Bernard */
- /* Serpette of INRIA. */
- /* This assumes ZMAGIC, i.e. demand-loadable executables. */
-# define TEXTSTART 0x2000
-# define DATASTART ((ptr_t)(*(int *)(TEXTSTART+0x4)+TEXTSTART))
-# define MPROTECT_VDB
-# define HEURISTIC1
-# define DYNAMIC_LOADING
-# endif
-# ifdef DRSNX
-# define CPP_WORDSZ 32
-# define OS_TYPE "DRSNX"
- extern char * GC_SysVGetDataStart();
- extern int etext;
-# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &etext)
-# define MPROTECT_VDB
-# define STACKBOTTOM ((ptr_t) 0xdfff0000)
-# define DYNAMIC_LOADING
-# endif
-# ifdef LINUX
-# define OS_TYPE "LINUX"
-# ifdef __ELF__
-# define LINUX_DATA_START
-# define DYNAMIC_LOADING
-# else
- Linux Sparc non elf ?
-# endif
- extern int _end;
-# define DATAEND (&_end)
-# define SVR4
-# define STACKBOTTOM ((ptr_t) 0xf0000000)
-# endif
-# ifdef OPENBSD
-# define OS_TYPE "OPENBSD"
-# define STACKBOTTOM ((ptr_t) 0xf8000000)
-# define DATASTART ((ptr_t)(&etext))
-# endif
-# endif
-
-# ifdef I386
-# define MACH_TYPE "I386"
-# define ALIGNMENT 4 /* Appears to hold for all "32 bit" compilers */
- /* except Borland. The -a4 option fixes */
- /* Borland. */
- /* Ivan Demakov: For Watcom the option is -zp4. */
-# ifndef SMALL_CONFIG
-# define ALIGN_DOUBLE /* Not strictly necessary, but may give speed */
- /* improvement on Pentiums. */
-# endif
-# ifdef SEQUENT
-# define OS_TYPE "SEQUENT"
- extern int etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
-# define STACKBOTTOM ((ptr_t) 0x3ffff000)
-# endif
-# ifdef SUNOS5
-# define OS_TYPE "SUNOS5"
- extern int etext, _start;
- extern char * GC_SysVGetDataStart();
-# define DATASTART GC_SysVGetDataStart(0x1000, &etext)
-# define STACKBOTTOM ((ptr_t)(&_start))
-/** At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */
-/*# define PROC_VDB*/
-# define DYNAMIC_LOADING
-# ifndef USE_MMAP
-# define USE_MMAP
-# endif
-# ifdef USE_MMAP
-# define HEAP_START (ptr_t)0x40000000
-# else
-# define HEAP_START DATAEND
-# endif
-# endif
-# ifdef SCO
-# define OS_TYPE "SCO"
- extern int etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \
- & ~0x3fffff) \
- +((word)&etext & 0xfff))
-# define STACKBOTTOM ((ptr_t) 0x7ffffffc)
-# endif
-# ifdef SCO_ELF
-# define OS_TYPE "SCO_ELF"
- extern int etext;
-# define DATASTART ((ptr_t)(&etext))
-# define STACKBOTTOM ((ptr_t) 0x08048000)
-# define DYNAMIC_LOADING
-# define ELF_CLASS ELFCLASS32
-# endif
-# ifdef LINUX
-# define OS_TYPE "LINUX"
-# define LINUX_STACKBOTTOM
-# if 0
-# define HEURISTIC1
-# undef STACK_GRAN
-# define STACK_GRAN 0x10000000
- /* STACKBOTTOM is usually 0xc0000000, but this changes with */
- /* different kernel configurations. In particular, systems */
- /* with 2GB physical memory will usually move the user */
- /* address space limit, and hence initial SP to 0x80000000. */
-# endif
-# if !defined(LINUX_THREADS) || !defined(REDIRECT_MALLOC)
-# define MPROTECT_VDB
-# else
- /* We seem to get random errors in incremental mode, */
- /* possibly because Linux threads is itself a malloc client */
- /* and can't deal with the signals. */
-# endif
-# ifdef __ELF__
-# define DYNAMIC_LOADING
-# ifdef UNDEFINED /* includes ro data */
- extern int _etext;
-# define DATASTART ((ptr_t)((((word) (&_etext)) + 0xfff) & ~0xfff))
-# endif
-# include <features.h>
-# if defined(__GLIBC__) && __GLIBC__ >= 2
-# define LINUX_DATA_START
-# else
- extern char **__environ;
-# define DATASTART ((ptr_t)(&__environ))
- /* hideous kludge: __environ is the first */
- /* word in crt0.o, and delimits the start */
- /* of the data segment, no matter which */
- /* ld options were passed through. */
- /* We could use _etext instead, but that */
- /* would include .rodata, which may */
- /* contain large read-only data tables */
- /* that we'd rather not scan. */
-# endif
- extern int _end;
-# define DATAEND (&_end)
-# else
- extern int etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
-# endif
-# ifdef USE_I686_PREFETCH
-# define PREFETCH(x) \
- __asm__ __volatile__ (" prefetchnta %0": : "m"(*(char *)(x)))
- /* Empirically prefetcht0 is much more effective at reducing */
- /* cache miss stalls for the targetted load instructions. But it */
- /* seems to interfere enough with other cache traffic that the net */
- /* result is worse than prefetchnta. */
-# if 0
- /* Using prefetches for write seems to have a slight negative */
- /* impact on performance, at least for a PIII/500. */
-# define PREFETCH_FOR_WRITE(x) \
- __asm__ __volatile__ (" prefetcht0 %0": : "m"(*(char *)(x)))
-# endif
-# endif
-# ifdef USE_3DNOW_PREFETCH
-# define PREFETCH(x) \
- __asm__ __volatile__ (" prefetch %0": : "m"(*(char *)(x)))
-# define PREFETCH_FOR_WRITE(x)
- __asm__ __volatile__ (" prefetchw %0": : "m"(*(char *)(x)))
-# endif
-# endif
-# ifdef CYGWIN32
-# define OS_TYPE "CYGWIN32"
- extern int _data_start__;
- extern int _data_end__;
- extern int _bss_start__;
- extern int _bss_end__;
- /* For binutils 2.9.1, we have */
- /* DATASTART = _data_start__ */
- /* DATAEND = _bss_end__ */
- /* whereas for some earlier versions it was */
- /* DATASTART = _bss_start__ */
- /* DATAEND = _data_end__ */
- /* To get it right for both, we take the */
- /* minumum/maximum of the two. */
-# define MAX(x,y) ((x) > (y) ? (x) : (y))
-# define MIN(x,y) ((x) < (y) ? (x) : (y))
-# define DATASTART ((ptr_t) MIN(&_data_start__, &_bss_start__))
-# define DATAEND ((ptr_t) MAX(&_data_end__, &_bss_end__))
-# undef STACK_GRAN
-# define STACK_GRAN 0x10000
-# define HEURISTIC1
-# endif
-# ifdef OS2
-# define OS_TYPE "OS2"
- /* STACKBOTTOM and DATASTART are handled specially in */
- /* os_dep.c. OS2 actually has the right */
- /* system call! */
-# define DATAEND /* not needed */
-# endif
-# ifdef MSWIN32
-# define OS_TYPE "MSWIN32"
- /* STACKBOTTOM and DATASTART are handled specially in */
- /* os_dep.c. */
-# ifndef __WATCOMC__
-# define MPROTECT_VDB
-# endif
-# define DATAEND /* not needed */
-# endif
-# ifdef DJGPP
-# define OS_TYPE "DJGPP"
-# include "stubinfo.h"
- extern int etext;
- extern int _stklen;
- extern int __djgpp_stack_limit;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ff) & ~0x1ff))
-/* # define STACKBOTTOM ((ptr_t)((word) _stubinfo + _stubinfo->size \
- + _stklen)) */
-# define STACKBOTTOM ((ptr_t)((word) __djgpp_stack_limit + _stklen))
- /* This may not be right. */
-# endif
-# ifdef OPENBSD
-# define OS_TYPE "OPENBSD"
-# endif
-# ifdef FREEBSD
-# define OS_TYPE "FREEBSD"
-# define MPROTECT_VDB
-# endif
-# ifdef NETBSD
-# define OS_TYPE "NETBSD"
-# endif
-# ifdef THREE86BSD
-# define OS_TYPE "THREE86BSD"
-# endif
-# ifdef BSDI
-# define OS_TYPE "BSDI"
-# endif
-# if defined(OPENBSD) || defined(FREEBSD) || defined(NETBSD) \
- || defined(THREE86BSD) || defined(BSDI)
-# define HEURISTIC2
- extern char etext;
-# define DATASTART ((ptr_t)(&etext))
-# endif
-# ifdef NEXT
-# define OS_TYPE "NEXT"
-# define DATASTART ((ptr_t) get_etext())
-# define STACKBOTTOM ((ptr_t)0xc0000000)
-# define DATAEND /* not needed */
-# endif
-# ifdef DOS4GW
-# define OS_TYPE "DOS4GW"
- extern long __nullarea;
- extern char _end;
- extern char *_STACKTOP;
- /* Depending on calling conventions Watcom C either precedes
- or does not precedes with undescore names of C-variables.
- Make sure startup code variables always have the same names. */
- #pragma aux __nullarea "*";
- #pragma aux _end "*";
-# define STACKBOTTOM ((ptr_t) _STACKTOP)
- /* confused? me too. */
-# define DATASTART ((ptr_t) &__nullarea)
-# define DATAEND ((ptr_t) &_end)
-# endif
-# endif
-
-# ifdef NS32K
-# define MACH_TYPE "NS32K"
-# define ALIGNMENT 4
- extern char **environ;
-# define DATASTART ((ptr_t)(&environ))
- /* hideous kludge: environ is the first */
- /* word in crt0.o, and delimits the start */
- /* of the data segment, no matter which */
- /* ld options were passed through. */
-# define STACKBOTTOM ((ptr_t) 0xfffff000) /* for Encore */
-# endif
-
-# ifdef MIPS
-# define MACH_TYPE "MIPS"
-/* # define STACKBOTTOM ((ptr_t)0x7fff8000) sometimes also works. */
-# ifdef LINUX
- /* This was developed for a linuxce style platform. Probably */
- /* needs to be tweaked for workstation class machines. */
-# define OS_TYPE "LINUX"
- extern int __data_start;
-# define DATASTART ((ptr_t)(&__data_start))
-# define ALIGNMENT 4
-# define USE_GENERIC_PUSH_REGS 1
-# define STACKBOTTOM 0x80000000
- /* In many cases, this should probably use LINUX_STACKBOTTOM */
- /* instead. But some kernel versions seem to give the wrong */
- /* value from /proc. */
-# endif /* Linux */
-# ifdef ULTRIX
-# define HEURISTIC2
-# define DATASTART (ptr_t)0x10000000
- /* Could probably be slightly higher since */
- /* startup code allocates lots of stuff. */
-# define OS_TYPE "ULTRIX"
-# define ALIGNMENT 4
-# endif
-# ifdef RISCOS
-# define HEURISTIC2
-# define DATASTART (ptr_t)0x10000000
-# define OS_TYPE "RISCOS"
-# define ALIGNMENT 4 /* Required by hardware */
-# endif
-# ifdef IRIX5
-# define HEURISTIC2
- extern int _fdata;
-# define DATASTART ((ptr_t)(&_fdata))
-# ifdef USE_MMAP
-# define HEAP_START (ptr_t)0x30000000
-# else
-# define HEAP_START DATASTART
-# endif
- /* Lowest plausible heap address. */
- /* In the MMAP case, we map there. */
- /* In either case it is used to identify */
- /* heap sections so they're not */
- /* considered as roots. */
-# define OS_TYPE "IRIX5"
-# define MPROTECT_VDB
-# ifdef _MIPS_SZPTR
-# define CPP_WORDSZ _MIPS_SZPTR
-# define ALIGNMENT (_MIPS_SZPTR/8)
-# if CPP_WORDSZ != 64
-# define ALIGN_DOUBLE
-# endif
-# else
-# define ALIGNMENT 4
-# define ALIGN_DOUBLE
-# endif
-# define DYNAMIC_LOADING
-# endif
-# endif
-
-# ifdef RS6000
-# define MACH_TYPE "RS6000"
-# define ALIGNMENT 4
-# define DATASTART ((ptr_t)0x20000000)
- extern int errno;
-# define STACKBOTTOM ((ptr_t)((ulong)&errno))
-# define DYNAMIC_LOADING
- /* For really old versions of AIX, this may have to be removed. */
-# endif
-
-# ifdef HP_PA
- /* OS is assumed to be HP/UX */
-# define MACH_TYPE "HP_PA"
-# define OS_TYPE "HPUX"
-# ifdef __LP64__
-# define CPP_WORDSZ 64
-# define ALIGNMENT 8
-# else
-# define CPP_WORDSZ 32
-# define ALIGNMENT 4
-# define ALIGN_DOUBLE
-# endif
- extern int __data_start;
-# define DATASTART ((ptr_t)(&__data_start))
-# if 0
- /* The following appears to work for 7xx systems running HP/UX */
- /* 9.xx Furthermore, it might result in much faster */
- /* collections than HEURISTIC2, which may involve scanning */
- /* segments that directly precede the stack. It is not the */
- /* default, since it may not work on older machine/OS */
- /* combinations. (Thanks to Raymond X.T. Nijssen for uncovering */
- /* this.) */
-# define STACKBOTTOM ((ptr_t) 0x7b033000) /* from /etc/conf/h/param.h */
-# else
- /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */
- /* to this. We'll probably do this on other platforms, too. */
- /* For now I'll use it where I can test it. */
- extern char ** environ;
-# define STACKBOTTOM ((ptr_t)environ)
-# endif
-# define STACK_GROWS_UP
-# define DYNAMIC_LOADING
-# ifndef HPUX_THREADS
-# define MPROTECT_VDB
-# endif
-# include <unistd.h>
-# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
-# endif
-
-# ifdef ALPHA
-# define MACH_TYPE "ALPHA"
-# define ALIGNMENT 8
-# define USE_GENERIC_PUSH_REGS
- /* Gcc and probably the DEC/Compaq compiler spill pointers to preserved */
- /* fp registers in some cases when the target is a 21264. The assembly */
- /* code doesn't handle that yet, and version dependencies make that a */
- /* bit tricky. Do the easy thing for now. */
-# ifdef OSF1
-# define OS_TYPE "OSF1"
-# define DATASTART ((ptr_t) 0x140000000)
- extern int _end;
-# define DATAEND ((ptr_t) &_end)
-# define HEURISTIC2
- /* Normally HEURISTIC2 is too conervative, since */
- /* the text segment immediately follows the stack. */
- /* Hence we give an upper pound. */
- extern int __start;
-# define HEURISTIC2_LIMIT ((ptr_t)((word)(&__start) & ~(getpagesize()-1)))
-# define CPP_WORDSZ 64
-# define MPROTECT_VDB
-# define DYNAMIC_LOADING
-# endif
-# ifdef LINUX
-# define OS_TYPE "LINUX"
-# define CPP_WORDSZ 64
-# define STACKBOTTOM ((ptr_t) 0x120000000)
-# ifdef __ELF__
-# define LINUX_DATA_START
-# define DYNAMIC_LOADING
- /* This doesn't work if the collector is in a dynamic library. */
-# else
-# define DATASTART ((ptr_t) 0x140000000)
-# endif
- extern int _end;
-# define DATAEND (&_end)
-# define MPROTECT_VDB
- /* Has only been superficially tested. May not */
- /* work on all versions. */
-# endif
-# endif
-
-# ifdef IA64
-# define MACH_TYPE "IA64"
-# define ALIGN_DOUBLE
- /* Requires 16 byte alignment for malloc */
-# define ALIGNMENT 8
-# define USE_GENERIC_PUSH_REGS
- /* We need to get preserved registers in addition to register windows. */
- /* That's easiest to do with setjmp. */
-# ifdef HPUX
- --> needs work
-# endif
-# ifdef LINUX
-# define OS_TYPE "LINUX"
-# define CPP_WORDSZ 64
- /* This should really be done through /proc, but that */
- /* requires we run on an IA64 kernel. */
-# define STACKBOTTOM ((ptr_t) 0xa000000000000000l)
- /* We also need the base address of the register stack */
- /* backing store. There is probably a better way to */
- /* get that, too ... */
-# define BACKING_STORE_BASE ((ptr_t) 0x9fffffff80000000l)
-# if 1
-# define SEARCH_FOR_DATA_START
-# define DATASTART GC_data_start
-# else
- extern int data_start;
-# define DATASTART ((ptr_t)(&data_start))
-# endif
-# define DYNAMIC_LOADING
-# define MPROTECT_VDB
- /* Requires Linux 2.3.47 or later. */
- extern int _end;
-# define DATAEND (&_end)
-# define PREFETCH(x) \
- __asm__ (" lfetch [%0]": : "r"((void *)(x)))
-# define PREFETCH_FOR_WRITE(x) \
- __asm__ (" lfetch.excl [%0]": : "r"((void *)(x)))
-# define CLEAR_DOUBLE(x) \
- __asm__ (" stf.spill [%0]=f0": : "r"((void *)(x)))
-# endif
-# endif
-
-# ifdef M88K
-# define MACH_TYPE "M88K"
-# define ALIGNMENT 4
-# define ALIGN_DOUBLE
- extern int etext;
-# ifdef CX_UX
-# define OS_TYPE "CX_UX"
-# define DATASTART ((((word)&etext + 0x3fffff) & ~0x3fffff) + 0x10000)
-# endif
-# ifdef DGUX
-# define OS_TYPE "DGUX"
- extern char * GC_SysVGetDataStart();
-# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &etext)
-# endif
-# define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */
-# endif
-
-# ifdef S370
-# define MACH_TYPE "S370"
-# define OS_TYPE "UTS4"
-# define ALIGNMENT 4 /* Required by hardware */
- extern int etext;
- extern int _etext;
- extern int _end;
- extern char * GC_SysVGetDataStart();
-# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext)
-# define DATAEND (&_end)
-# define HEURISTIC2
-# endif
-
-# if defined(PJ)
-# define ALIGNMENT 4
- extern int _etext;
-# define DATASTART ((ptr_t)(&_etext))
-# define HEURISTIC1
-# endif
-
-# ifdef ARM32
-# define CPP_WORDSZ 32
-# define MACH_TYPE "ARM32"
-# define ALIGNMENT 4
-# ifdef NETBSD
-# define OS_TYPE "NETBSD"
-# define HEURISTIC2
- extern char etext;
-# define DATASTART ((ptr_t)(&etext))
-# define USE_GENERIC_PUSH_REGS
-# endif
-# ifdef LINUX
-# define OS_TYPE "LINUX"
-# define HEURISTIC1
-# undef STACK_GRAN
-# define STACK_GRAN 0x10000000
-# define USE_GENERIC_PUSH_REGS
-# ifdef __ELF__
-# define DYNAMIC_LOADING
-# include <features.h>
-# if defined(__GLIBC__) && __GLIBC__ >= 2
-# define LINUX_DATA_START
-# else
- extern char **__environ;
-# define DATASTART ((ptr_t)(&__environ))
- /* hideous kludge: __environ is the first */
- /* word in crt0.o, and delimits the start */
- /* of the data segment, no matter which */
- /* ld options were passed through. */
- /* We could use _etext instead, but that */
- /* would include .rodata, which may */
- /* contain large read-only data tables */
- /* that we'd rather not scan. */
-# endif
- extern int _end;
-# define DATAEND (&_end)
-# else
- extern int etext;
-# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
-# endif
-# endif
-#endif
-
-#ifdef LINUX_DATA_START
- /* Some Linux distributions arrange to define __data_start. Some */
- /* define data_start as a weak symbol. The latter is technically */
- /* broken, since the user program may define data_start, in which */
- /* case we lose. Nonetheless, we try both, prefering __data_start. */
- /* We assume gcc. */
-# pragma weak __data_start
- extern int __data_start;
-# pragma weak data_start
- extern int data_start;
-# define DATASTART ((ptr_t)(&__data_start != 0? &__data_start : &data_start))
-#endif
-
-# ifndef STACK_GROWS_UP
-# define STACK_GROWS_DOWN
-# endif
-
-# ifndef CPP_WORDSZ
-# define CPP_WORDSZ 32
-# endif
-
-# ifndef OS_TYPE
-# define OS_TYPE ""
-# endif
-
-# ifndef DATAEND
- extern int end;
-# define DATAEND (&end)
-# endif
-
-# if defined(SVR4) && !defined(GETPAGESIZE)
-# include <unistd.h>
-# define GETPAGESIZE() sysconf(_SC_PAGESIZE)
-# endif
-
-# ifndef GETPAGESIZE
-# if defined(SUNOS5) || defined(IRIX5)
-# include <unistd.h>
-# endif
-# define GETPAGESIZE() getpagesize()
-# endif
-
-# if defined(SUNOS5) || defined(DRSNX) || defined(UTS4)
- /* OS has SVR4 generic features. Probably others also qualify. */
-# define SVR4
-# endif
-
-# if defined(SUNOS5) || defined(DRSNX)
- /* OS has SUNOS5 style semi-undocumented interface to dynamic */
- /* loader. */
-# define SUNOS5DL
- /* OS has SUNOS5 style signal handlers. */
-# define SUNOS5SIGS
-# endif
-
-# if defined(HPUX)
-# define SUNOS5SIGS
-# endif
-
-# if CPP_WORDSZ != 32 && CPP_WORDSZ != 64
- -> bad word size
-# endif
-
-# ifdef PCR
-# undef DYNAMIC_LOADING
-# undef STACKBOTTOM
-# undef HEURISTIC1
-# undef HEURISTIC2
-# undef PROC_VDB
-# undef MPROTECT_VDB
-# define PCR_VDB
-# endif
-
-# ifdef SRC_M3
-/* Postponed for now. */
-# undef PROC_VDB
-# undef MPROTECT_VDB
-# endif
-
-# ifdef SMALL_CONFIG
-/* Presumably not worth the space it takes. */
-# undef PROC_VDB
-# undef MPROTECT_VDB
-# endif
-
-# ifdef USE_MUNMAP
-# undef MPROTECT_VDB /* Can't deal with address space holes. */
-# endif
-
-# if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB)
-# define DEFAULT_VDB
-# endif
-
-# ifndef PREFETCH
-# define PREFETCH(x)
-# define NO_PREFETCH
-# endif
-
-# ifndef PREFETCH_FOR_WRITE
-# define PREFETCH_FOR_WRITE(x)
-# define NO_PREFETCH_FOR_WRITE
-# endif
-
-# ifndef CACHE_LINE_SIZE
-# define CACHE_LINE_SIZE 32 /* Wild guess */
-# endif
-
-# ifndef CLEAR_DOUBLE
-# define CLEAR_DOUBLE(x) \
- ((word*)x)[0] = 0; \
- ((word*)x)[1] = 0;
-# endif /* CLEAR_DOUBLE */
-
-# if defined(_SOLARIS_PTHREADS) && !defined(SOLARIS_THREADS)
-# define SOLARIS_THREADS
-# endif
-# if defined(IRIX_THREADS) && !defined(IRIX5)
---> inconsistent configuration
-# endif
-# if defined(IRIX_JDK_THREADS) && !defined(IRIX5)
---> inconsistent configuration
-# endif
-# if defined(LINUX_THREADS) && !defined(LINUX)
---> inconsistent configuration
-# endif
-# if defined(SOLARIS_THREADS) && !defined(SUNOS5)
---> inconsistent configuration
-# endif
-# if defined(HPUX_THREADS) && !defined(HPUX)
---> inconsistent configuration
-# endif
-# if defined(PCR) || defined(SRC_M3) || \
- defined(SOLARIS_THREADS) || defined(WIN32_THREADS) || \
- defined(IRIX_THREADS) || defined(LINUX_THREADS) || \
- defined(IRIX_JDK_THREADS) || defined(HPUX_THREADS)
-# define THREADS
-# endif
-
-# if defined(HP_PA) || defined(M88K) || defined(POWERPC) \
- || (defined(I386) && defined(OS2)) || defined(UTS4) || defined(LINT)
- /* Use setjmp based hack to mark from callee-save registers. */
-# define USE_GENERIC_PUSH_REGS
-# endif
-# if defined(SPARC) && !defined(LINUX)
-# define SAVE_CALL_CHAIN
-# define ASM_CLEAR_CODE /* Stack clearing is crucial, and we */
- /* include assembly code to do it well. */
-# endif
-
-# endif /* GCCONFIG_H */