mirror of
git://gcc.gnu.org/git/gcc.git
synced 2024-12-21 14:59:58 +08:00
1062 lines
32 KiB
C
1062 lines
32 KiB
C
/*
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* Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers
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* Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved.
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* Copyright (c) 1996 by Silicon Graphics. All rights reserved.
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*
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* THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED
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* OR IMPLIED. ANY USE IS AT YOUR OWN RISK.
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*
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* Permission is hereby granted to use or copy this program
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* for any purpose, provided the above notices are retained on all copies.
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* Permission to modify the code and to distribute modified code is granted,
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* provided the above notices are retained, and a notice that the code was
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* modified is included with the above copyright notice.
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*/
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#ifndef CONFIG_H
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# define CONFIG_H
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/* Machine dependent parameters. Some tuning parameters can be found */
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/* near the top of gc_private.h. */
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/* Machine specific parts contributed by various people. See README file. */
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/* First a unified test for Linux: */
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# if defined(linux) || defined(__linux__)
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# define LINUX
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# endif
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/* Determine the machine type: */
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# if defined(sun) && defined(mc68000)
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# define M68K
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# define SUNOS4
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# define mach_type_known
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# endif
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# if defined(hp9000s300)
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# define M68K
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# define HP
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# define mach_type_known
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# endif
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# if defined(__OpenBSD__) && defined(m68k)
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# define M68K
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# define OPENBSD
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# define mach_type_known
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# endif
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# if defined(__NetBSD__) && defined(m68k)
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# define M68K
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# define NETBSD
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# define mach_type_known
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# endif
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# if defined(vax)
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# define VAX
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# ifdef ultrix
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# define ULTRIX
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# else
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# define BSD
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# endif
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# define mach_type_known
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# endif
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# if defined(mips) || defined(__mips)
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# define MIPS
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# if defined(ultrix) || defined(__ultrix) || defined(__NetBSD__)
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# define ULTRIX
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# else
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# if defined(_SYSTYPE_SVR4) || defined(SYSTYPE_SVR4) || defined(__SYSTYPE_SVR4__)
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# define IRIX5 /* or IRIX 6.X */
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# else
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# define RISCOS /* or IRIX 4.X */
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# endif
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# endif
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# define mach_type_known
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# endif
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# if defined(sequent) && defined(i386)
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# define I386
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# define SEQUENT
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# define mach_type_known
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# endif
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# if defined(sun) && defined(i386)
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# define I386
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# define SUNOS5
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# define mach_type_known
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# endif
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# if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__)
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# define I386
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# define OS2
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# define mach_type_known
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# endif
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# if defined(ibm032)
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# define RT
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# define mach_type_known
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# endif
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# if defined(sun) && (defined(sparc) || defined(__sparc))
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# define SPARC
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/* Test for SunOS 5.x */
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# include <errno.h>
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# ifdef ECHRNG
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# define SUNOS5
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# else
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# define SUNOS4
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# endif
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# define mach_type_known
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# endif
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# if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux)
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# define SPARC
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# define DRSNX
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# define mach_type_known
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# endif
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# if defined(_IBMR2)
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# define RS6000
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# define mach_type_known
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# endif
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# if defined(_M_XENIX) && defined(_M_SYSV) && defined(_M_I386)
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/* The above test may need refinement */
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# define I386
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# if defined(_SCO_ELF)
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# define SCO_ELF
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# else
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# define SCO
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# endif
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# define mach_type_known
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# endif
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# if defined(_AUX_SOURCE)
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# define M68K
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# define SYSV
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# define mach_type_known
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# endif
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# if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) \
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|| defined(hppa) || defined(__hppa__)
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# define HP_PA
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# define mach_type_known
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# endif
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# if defined(LINUX) && defined(i386)
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# define I386
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# define mach_type_known
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# endif
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# if defined(LINUX) && defined(powerpc)
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# define POWERPC
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# define mach_type_known
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# endif
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# if defined(LINUX) && defined(__mc68000__)
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# define M68K
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# define mach_type_known
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# endif
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# if defined(linux) && defined(sparc)
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# define SPARC
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# define LINUX
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# define mach_type_known
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# endif
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# if defined(__alpha) || defined(__alpha__)
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# define ALPHA
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# if !defined(LINUX)
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# define OSF1 /* a.k.a Digital Unix */
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# endif
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# define mach_type_known
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# endif
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# if defined(_AMIGA)
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# define M68K
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# define AMIGA
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# define mach_type_known
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# endif
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# if defined(THINK_C) || defined(__MWERKS__) && !defined(__powerc)
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# define M68K
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# define MACOS
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# define mach_type_known
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# endif
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# if defined(__MWERKS__) && defined(__powerc)
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# define POWERPC
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# define MACOS
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# define mach_type_known
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# endif
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# if defined(NeXT) && defined(mc68000)
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# define M68K
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# define NEXT
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# define mach_type_known
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# endif
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# if defined(NeXT) && defined(i386)
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# define I386
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# define NEXT
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# define mach_type_known
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# endif
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# if defined(__OpenBSD__) && defined(i386)
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# define I386
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# define OPENBSD
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# define mach_type_known
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# endif
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# if defined(__FreeBSD__) && defined(i386)
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# define I386
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# define FREEBSD
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# define mach_type_known
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# endif
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# if defined(__NetBSD__) && defined(i386)
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# define I386
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# define NETBSD
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# define mach_type_known
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# endif
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# if defined(bsdi) && defined(i386)
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# define I386
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# define BSDI
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# define mach_type_known
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# endif
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# if !defined(mach_type_known) && defined(__386BSD__)
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# define I386
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# define THREE86BSD
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# define mach_type_known
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# endif
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# if defined(_CX_UX) && defined(_M88K)
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# define M88K
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# define CX_UX
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# define mach_type_known
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# endif
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# if defined(DGUX)
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# define M88K
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/* DGUX defined */
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# define mach_type_known
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# endif
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# if (defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300) \
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|| defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__)
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# define I386
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# define MSWIN32 /* or Win32s */
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# define mach_type_known
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# endif
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# if defined(__DJGPP__)
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# define I386
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# ifndef DJGPP
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# define DJGPP /* MSDOS running the DJGPP port of GCC */
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# endif
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# define mach_type_known
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# endif
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# if defined(__CYGWIN32__) || defined(__CYGWIN__)
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# define I386
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# define CYGWIN32
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# define mach_type_known
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# endif
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# if defined(__BORLANDC__)
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# define I386
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# define MSWIN32
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# define mach_type_known
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# endif
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# if defined(_UTS) && !defined(mach_type_known)
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# define S370
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# define UTS4
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# define mach_type_known
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# endif
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/* Ivan Demakov */
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# if defined(__WATCOMC__) && defined(__386__)
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# define I386
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# if !defined(OS2) && !defined(MSWIN32) && !defined(DOS4GW)
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# if defined(__OS2__)
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# define OS2
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# else
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# if defined(__WINDOWS_386__) || defined(__NT__)
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# define MSWIN32
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# else
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# define DOS4GW
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# endif
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# endif
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# endif
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# define mach_type_known
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# endif
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/* Feel free to add more clauses here */
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/* Or manually define the machine type here. A machine type is */
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/* characterized by the architecture. Some */
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/* machine types are further subdivided by OS. */
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/* the macros ULTRIX, RISCOS, and BSD to distinguish. */
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/* Note that SGI IRIX is treated identically to RISCOS. */
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/* SYSV on an M68K actually means A/UX. */
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/* The distinction in these cases is usually the stack starting address */
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# ifndef mach_type_known
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--> unknown machine type
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# endif
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/* Mapping is: M68K ==> Motorola 680X0 */
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/* (SUNOS4,HP,NEXT, and SYSV (A/UX), */
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/* MACOS and AMIGA variants) */
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/* I386 ==> Intel 386 */
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/* (SEQUENT, OS2, SCO, LINUX, NETBSD, */
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/* FREEBSD, THREE86BSD, MSWIN32, */
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/* BSDI,SUNOS5, NEXT, other variants) */
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/* NS32K ==> Encore Multimax */
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/* MIPS ==> R2000 or R3000 */
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/* (RISCOS, ULTRIX variants) */
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/* VAX ==> DEC VAX */
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/* (BSD, ULTRIX variants) */
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/* RS6000 ==> IBM RS/6000 AIX3.X */
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/* RT ==> IBM PC/RT */
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/* HP_PA ==> HP9000/700 & /800 */
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/* HP/UX */
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/* SPARC ==> SPARC under SunOS */
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/* (SUNOS4, SUNOS5, */
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/* DRSNX variants) */
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/* ALPHA ==> DEC Alpha */
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/* (OSF1 and LINUX variants) */
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/* M88K ==> Motorola 88XX0 */
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/* (CX_UX and DGUX) */
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/* S370 ==> 370-like machine */
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/* running Amdahl UTS4 */
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/*
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* For each architecture and OS, the following need to be defined:
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*
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* CPP_WORD_SZ is a simple integer constant representing the word size.
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* in bits. We assume byte addressibility, where a byte has 8 bits.
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* We also assume CPP_WORD_SZ is either 32 or 64.
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* (We care about the length of pointers, not hardware
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* bus widths. Thus a 64 bit processor with a C compiler that uses
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* 32 bit pointers should use CPP_WORD_SZ of 32, not 64. Default is 32.)
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*
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* MACH_TYPE is a string representation of the machine type.
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* OS_TYPE is analogous for the OS.
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*
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* ALIGNMENT is the largest N, such that
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* all pointer are guaranteed to be aligned on N byte boundaries.
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* defining it to be 1 will always work, but perform poorly.
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*
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* DATASTART is the beginning of the data segment.
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* On UNIX systems, the collector will scan the area between DATASTART
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* and DATAEND for root pointers.
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*
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* DATAEND, if not &end.
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*
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* ALIGN_DOUBLE of GC_malloc should return blocks aligned to twice
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* the pointer size.
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*
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* STACKBOTTOM is the cool end of the stack, which is usually the
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* highest address in the stack.
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* Under PCR or OS/2, we have other ways of finding thread stacks.
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* For each machine, the following should:
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* 1) define STACK_GROWS_UP if the stack grows toward higher addresses, and
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* 2) define exactly one of
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* STACKBOTTOM (should be defined to be an expression)
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* HEURISTIC1
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* HEURISTIC2
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* If either of the last two macros are defined, then STACKBOTTOM is computed
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* during collector startup using one of the following two heuristics:
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* HEURISTIC1: Take an address inside GC_init's frame, and round it up to
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* the next multiple of STACK_GRAN.
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* HEURISTIC2: Take an address inside GC_init's frame, increment it repeatedly
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* in small steps (decrement if STACK_GROWS_UP), and read the value
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* at each location. Remember the value when the first
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* Segmentation violation or Bus error is signalled. Round that
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* to the nearest plausible page boundary, and use that instead
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* of STACKBOTTOM.
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*
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* If no expression for STACKBOTTOM can be found, and neither of the above
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* heuristics are usable, the collector can still be used with all of the above
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* undefined, provided one of the following is done:
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* 1) GC_mark_roots can be changed to somehow mark from the correct stack(s)
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* without reference to STACKBOTTOM. This is appropriate for use in
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* conjunction with thread packages, since there will be multiple stacks.
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* (Allocating thread stacks in the heap, and treating them as ordinary
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* heap data objects is also possible as a last resort. However, this is
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* likely to introduce significant amounts of excess storage retention
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* unless the dead parts of the thread stacks are periodically cleared.)
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* 2) Client code may set GC_stackbottom before calling any GC_ routines.
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* If the author of the client code controls the main program, this is
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* easily accomplished by introducing a new main program, setting
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* GC_stackbottom to the address of a local variable, and then calling
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* the original main program. The new main program would read something
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* like:
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*
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* # include "gc_private.h"
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*
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* main(argc, argv, envp)
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* int argc;
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* char **argv, **envp;
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* {
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* int dummy;
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*
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* GC_stackbottom = (ptr_t)(&dummy);
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* return(real_main(argc, argv, envp));
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* }
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*
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*
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* Each architecture may also define the style of virtual dirty bit
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* implementation to be used:
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* MPROTECT_VDB: Write protect the heap and catch faults.
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* PROC_VDB: Use the SVR4 /proc primitives to read dirty bits.
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*
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* An architecture may define DYNAMIC_LOADING if dynamic_load.c
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* defined GC_register_dynamic_libraries() for the architecture.
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*/
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# define STACK_GRAN 0x1000000
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# ifdef M68K
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# define MACH_TYPE "M68K"
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# define ALIGNMENT 2
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# ifdef OPENBSD
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# define OS_TYPE "OPENBSD"
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# define HEURISTIC2
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extern char etext;
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# define DATASTART ((ptr_t)(&etext))
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# endif
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# ifdef NETBSD
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# define OS_TYPE "NETBSD"
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# define HEURISTIC2
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extern char etext;
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# define DATASTART ((ptr_t)(&etext))
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# endif
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# ifdef LINUX
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# define OS_TYPE "LINUX"
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# define STACKBOTTOM ((ptr_t)0xf0000000)
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# define MPROTECT_VDB
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# ifdef __ELF__
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# define DYNAMIC_LOADING
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extern char **__environ;
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# define DATASTART ((ptr_t)(&__environ))
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/* hideous kludge: __environ is the first */
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/* word in crt0.o, and delimits the start */
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/* of the data segment, no matter which */
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/* ld options were passed through. */
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/* We could use _etext instead, but that */
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/* would include .rodata, which may */
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/* contain large read-only data tables */
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/* that we'd rather not scan. */
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extern int _end;
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# define DATAEND (&_end)
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# else
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extern int etext;
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# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
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# endif
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# endif
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# ifdef SUNOS4
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# define OS_TYPE "SUNOS4"
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extern char etext;
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# define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ffff) & ~0x1ffff))
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# define HEURISTIC1 /* differs */
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# define DYNAMIC_LOADING
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# endif
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# ifdef HP
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# define OS_TYPE "HP"
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extern char etext;
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# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
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# define STACKBOTTOM ((ptr_t) 0xffeffffc)
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/* empirically determined. seems to work. */
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# include <unistd.h>
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# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
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# endif
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# ifdef SYSV
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# define OS_TYPE "SYSV"
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extern etext;
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# define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \
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& ~0x3fffff) \
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+((word)&etext & 0x1fff))
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/* This only works for shared-text binaries with magic number 0413.
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The other sorts of SysV binaries put the data at the end of the text,
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in which case the default of &etext would work. Unfortunately,
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handling both would require having the magic-number available.
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-- Parag
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*/
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# define STACKBOTTOM ((ptr_t)0xFFFFFFFE)
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/* The stack starts at the top of memory, but */
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/* 0x0 cannot be used as setjump_test complains */
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/* that the stack direction is incorrect. Two */
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/* bytes down from 0x0 should be safe enough. */
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/* --Parag */
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# include <sys/mmu.h>
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# define GETPAGESIZE() PAGESIZE /* Is this still right? */
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# endif
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# ifdef AMIGA
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# define OS_TYPE "AMIGA"
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|
/* STACKBOTTOM and DATASTART handled specially */
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|
/* in os_dep.c */
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|
# define DATAEND /* not needed */
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|
# define GETPAGESIZE() 4096
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|
# endif
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|
# ifdef MACOS
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|
# ifndef __LOWMEM__
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|
# include <LowMem.h>
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# endif
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# define OS_TYPE "MACOS"
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/* see os_dep.c for details of global data segments. */
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# define STACKBOTTOM ((ptr_t) LMGetCurStackBase())
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# define DATAEND /* not needed */
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# define GETPAGESIZE() 4096
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# endif
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# ifdef NEXT
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# define OS_TYPE "NEXT"
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# define DATASTART ((ptr_t) get_etext())
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# define STACKBOTTOM ((ptr_t) 0x4000000)
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|
# define DATAEND /* not needed */
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|
# endif
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|
# endif
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|
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# ifdef POWERPC
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|
# define MACH_TYPE "POWERPC"
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|
# define ALIGNMENT 2
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|
# ifdef MACOS
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|
# ifndef __LOWMEM__
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|
# include <LowMem.h>
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|
# 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
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|
# define OS_TYPE "LINUX"
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|
# define HEURISTIC1
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|
# undef STACK_GRAN
|
|
# define STACK_GRAN 0x10000000
|
|
# define DATASTART GC_data_start
|
|
extern int _end;
|
|
# define DATAEND (&_end)
|
|
# 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 DATASTART GC_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
|
|
# 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 STACKBOTTOM ((ptr_t)0xc0000000)
|
|
/* Appears to be 0xe0000000 for at least one 2.1.91 kernel. */
|
|
/* Probably needs to be more flexible, but I don't yet */
|
|
/* fully understand how flexible. */
|
|
# 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
|
|
extern int __data_start;
|
|
# define DATASTART ((ptr_t)(&__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
|
|
# 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"
|
|
# ifndef IRIX5
|
|
# define DATASTART (ptr_t)0x10000000
|
|
/* Could probably be slightly higher since */
|
|
/* startup code allocates lots of stuff. */
|
|
# else
|
|
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. */
|
|
# endif /* IRIX5 */
|
|
# define HEURISTIC2
|
|
/* # define STACKBOTTOM ((ptr_t)0x7fff8000) sometimes also works. */
|
|
# ifdef ULTRIX
|
|
# define OS_TYPE "ULTRIX"
|
|
# define ALIGNMENT 4
|
|
# endif
|
|
# ifdef RISCOS
|
|
# define OS_TYPE "RISCOS"
|
|
# define ALIGNMENT 4 /* Required by hardware */
|
|
# endif
|
|
# ifdef IRIX5
|
|
# 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
|
|
# define MACH_TYPE "HP_PA"
|
|
# define ALIGNMENT 4
|
|
# define ALIGN_DOUBLE
|
|
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
|
|
# define HEURISTIC2
|
|
# endif
|
|
# define STACK_GROWS_UP
|
|
# define DYNAMIC_LOADING
|
|
# include <unistd.h>
|
|
# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE)
|
|
/* They misspelled the Posix macro? */
|
|
# endif
|
|
|
|
# ifdef ALPHA
|
|
# define MACH_TYPE "ALPHA"
|
|
# define ALIGNMENT 8
|
|
# ifdef OSF1
|
|
# define OS_TYPE "OSF1"
|
|
# define DATASTART ((ptr_t) 0x140000000)
|
|
extern _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__
|
|
extern int __data_start;
|
|
# define DATASTART &__data_start
|
|
# define DYNAMIC_LOADING
|
|
# 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 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
|
|
|
|
# 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 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
|
|
|
|
# if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB)
|
|
# define DEFAULT_VDB
|
|
# endif
|
|
|
|
# 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(PCR) || defined(SRC_M3) || \
|
|
defined(SOLARIS_THREADS) || defined(WIN32_THREADS) || \
|
|
defined(IRIX_THREADS) || defined(LINUX_THREADS) || \
|
|
defined(IRIX_JDK_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
|