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Diffstat (limited to '')
| -rw-r--r-- | gc/include/private/gcconfig.h | 1986 |
1 files changed, 0 insertions, 1986 deletions
diff --git a/gc/include/private/gcconfig.h b/gc/include/private/gcconfig.h deleted file mode 100644 index c3adaa2..0000000 --- a/gc/include/private/gcconfig.h +++ /dev/null @@ -1,1986 +0,0 @@ -/* - * 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. - * Copyright (c) 2000 by Hewlett-Packard Company. 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 - -/* And one for NetBSD: */ -# if defined(__NetBSD__) -# define NETBSD -# endif - -/* And one for OpenBSD: */ -# if defined(__OpenBSD__) -# define OPENBSD -# endif - -/* And one for FreeBSD: */ -# if defined(__FreeBSD__) -# define FREEBSD -# endif - -/* Determine the machine type: */ -# if defined(__XSCALE__) -# define ARM32 -# if !defined(LINUX) -# define NOSYS -# define mach_type_known -# endif -# endif -# 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 mach_type_known -# endif -# if defined(OPENBSD) && defined(__sparc__) -# define SPARC -# define mach_type_known -# endif -# if defined(NETBSD) && defined(m68k) -# define M68K -# define mach_type_known -# endif -# if defined(NETBSD) && defined(__powerpc__) -# define POWERPC -# define mach_type_known -# endif -# if defined(NETBSD) && defined(__arm32__) -# define ARM32 -# 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) || defined(_mips) -# define MIPS -# if defined(nec_ews) || defined(_nec_ews) -# define EWS4800 -# endif -# if !defined(LINUX) && !defined(EWS4800) -# 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 */ -# if defined(__NetBSD__) && defined(__MIPSEL__) -# undef ULTRIX -# endif -# define mach_type_known -# endif -# if defined(DGUX) && (defined(i386) || defined(__i386__)) -# define I386 -# ifndef _USING_DGUX -# define _USING_DGUX -# endif -# define mach_type_known -# endif -# if defined(sequent) && (defined(i386) || defined(__i386__)) -# define I386 -# define SEQUENT -# define mach_type_known -# endif -# if defined(sun) && (defined(i386) || 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__) && !(__NetBSD__) -# define SPARC -# define DRSNX -# define mach_type_known -# endif -# if defined(_IBMR2) -# define RS6000 -# define mach_type_known -# endif -# if defined(__NetBSD__) && defined(__sparc__) -# define SPARC -# 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(__ia64) && defined(_HPUX_SOURCE) -# define IA64 -# define HPUX -# define mach_type_known -# endif -# if defined(__BEOS__) && defined(_X86_) -# define I386 -# define BEOS -# 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(__arm__) -# define ARM32 -# define mach_type_known -# endif -# if defined(LINUX) && (defined(powerpc) || 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(LINUX) && defined(__sh__) -# define SH -# define mach_type_known -# endif -# if defined(__alpha) || defined(__alpha__) -# define ALPHA -# if !defined(LINUX) && !defined(NETBSD) && !defined(OPENBSD) && !defined(FREEBSD) -# 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) && !defined(__MACH__) -# define POWERPC -# define MACOS -# define mach_type_known -# endif -# if defined(macosx) || \ - defined(__APPLE__) && defined(__MACH__) && defined(__ppc__) -# define MACOSX -# define POWERPC -# define mach_type_known -# endif -# if defined(__APPLE__) && defined(__MACH__) && defined(__i386__) -# define MACOSX -# define I386 - --> Not really supported, but at least we recognize it. -# endif -# if defined(NeXT) && defined(mc68000) -# define M68K -# define NEXT -# define mach_type_known -# endif -# if defined(NeXT) && (defined(i386) || defined(__i386__)) -# define I386 -# define NEXT -# define mach_type_known -# endif -# if defined(__OpenBSD__) && (defined(i386) || defined(__i386__)) -# define I386 -# define OPENBSD -# define mach_type_known -# endif -# if defined(FREEBSD) && (defined(i386) || defined(__i386__)) -# define I386 -# define mach_type_known -# endif -# if defined(__NetBSD__) && (defined(i386) || defined(__i386__)) -# define I386 -# define mach_type_known -# endif -# if defined(bsdi) && (defined(i386) || 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) && defined(m88k) -# define M88K - /* DGUX defined */ -# define mach_type_known -# endif -# if defined(_WIN32_WCE) - /* SH3, SH4, MIPS already defined for corresponding architectures */ -# if defined(SH3) || defined(SH4) -# define SH -# endif -# if defined(x86) -# define I386 -# endif -# if defined(ARM) -# define ARM32 -# endif -# define MSWINCE -# define mach_type_known -# else -# 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 -# 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 -# if defined(__embedded__) && defined(PPC) -# define POWERPC -# define NOSYS -# 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 -# if defined(__s390__) && defined(LINUX) -# define S370 -# define mach_type_known -# endif -# if defined(__GNU__) -# if defined(__i386__) -/* The Debian Hurd running on generic PC */ -# define HURD -# define I386 -# define mach_type_known -# endif -# 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, LINUX */ - /* SPARC ==> SPARC v7/v8/v9 */ - /* (SUNOS4, SUNOS5, LINUX, */ - /* DRSNX variants) */ - /* ALPHA ==> DEC Alpha */ - /* (OSF1 and LINUX variants) */ - /* M88K ==> Motorola 88XX0 */ - /* (CX_UX and DGUX) */ - /* S370 ==> 370-like machine */ - /* running Amdahl UTS4 */ - /* or a 390 running LINUX */ - /* ARM32 ==> Intel StrongARM */ - /* IA64 ==> Intel IPF */ - /* (e.g. Itanium) */ - /* (LINUX and HPUX) */ - /* IA64_32 ==> IA64 w/32 bit ABI */ - /* (HPUX) */ - /* SH ==> Hitachi SuperH */ - /* (LINUX & MSWINCE) */ - - -/* - * 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 some platforms SEARCH_FOR_DATA_START is defined. - * SEARCH_FOR_DATASTART will cause GC_data_start to - * be set to an address determined by accessing data backwards from _end - * until an unmapped page is found. DATASTART will be defined to be - * GC_data_start. - * On UNIX-like systems, the collector will scan the area between DATASTART - * and DATAEND for root pointers. - * - * DATAEND, if not `end' where `end' is defined as ``extern int end[];''. - * RTH suggests gaining access to linker script synth'd values with - * this idiom instead of `&end' where `end' is defined as ``extern int 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) - * LINUX_STACKBOTTOM - * HEURISTIC1 - * HEURISTIC2 - * If STACKBOTTOM is defined, then it's value will be used directly as the - * stack base. If LINUX_STACKBOTTOM is defined, then it will be determined - * with a method appropriate for most Linux systems. Currently we look - * first for __libc_stack_end, and if that fails read it from /proc. - * 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. However it has the disadvantage - * that it's confused by a putenv call before the collector is initialized. - * This could be dealt with by intercepting putenv ... - * - * 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. - * - * HEAP_START may be defined as the initial address hint for mmap-based - * allocation. - */ - -/* If we are using a recent version of gcc, we can use __builtin_unwind_init() - * to push the relevant registers onto the stack. This generally makes - * USE_GENERIC_PUSH_REGS the preferred approach for marking from registers. - */ -# if defined(__GNUC__) && ((__GNUC__ >= 3) || \ - (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)) -# define HAVE_BUILTIN_UNWIND_INIT -# endif - -# 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 - Reported to not work 9/17/01 */ -# ifdef __ELF__ -# define DYNAMIC_LOADING -# include <features.h> -# if defined(__GLIBC__)&& __GLIBC__>=2 -# define LINUX_DATA_START -# else /* !GLIBC2 */ - 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 /* !GLIBC2 */ - 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 - /* There are reasons to suspect this may not be reliable. */ -# define ALIGNMENT 4 -# define OS_TYPE "MACOSX" -# define DATASTART ((ptr_t) get_etext()) -# define STACKBOTTOM ((ptr_t) 0xc0000000) -# define DATAEND /* not needed */ -# define MPROTECT_VDB -# include <unistd.h> -# define GETPAGESIZE() getpagesize() -# endif -# ifdef NETBSD -# define ALIGNMENT 4 -# define OS_TYPE "NETBSD" -# define HEURISTIC2 - extern char etext[]; -# define DATASTART GC_data_start -# define DYNAMIC_LOADING -# endif -# ifdef NOSYS -# define ALIGNMENT 4 -# define OS_TYPE "NOSYS" - extern void __end[], __dso_handle[]; -# define DATASTART (__dso_handle) /* OK, that's ugly. */ -# define DATAEND (__end) - /* Stack starts at 0xE0000000 for the simulator. */ -# undef STACK_GRAN -# define STACK_GRAN 0x10000000 -# define HEURISTIC1 -# 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" -# if defined(__arch64__) || defined(__sparcv9) -# define ALIGNMENT 8 -# define CPP_WORDSZ 64 -# define ELF_CLASS ELFCLASS64 -# else -# define ALIGNMENT 4 /* Required by hardware */ -# define CPP_WORDSZ 32 -# endif -# define ALIGN_DOUBLE -# 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) -# if !defined(USE_MMAP) && defined(REDIRECT_MALLOC) -# define USE_MMAP - /* Otherwise we now use calloc. Mmap may result in the */ - /* heap interleaved with thread stacks, which can result in */ - /* excessive blacklisting. Sbrk is unusable since it */ - /* doesn't interact correctly with the system malloc. */ -# 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. */ -/* HEURISTIC2 probably works, but this appears to be preferable. */ -/* Apparently USRSTACK is defined to be USERLIMIT, but in some */ -/* installations that's undefined. We work around this with a */ -/* gross hack: */ -# include <sys/vmparam.h> -# ifdef USERLIMIT - /* This should work everywhere, but doesn't. */ -# define STACKBOTTOM USRSTACK -# else -# define HEURISTIC2 -# endif -# 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 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 DYNAMIC_LOADING -# else - Linux Sparc/a.out not supported -# endif - extern int _end[]; - extern int _etext[]; -# define DATAEND (_end) -# define SVR4 -# ifdef __arch64__ -# define DATASTART (ptr_t)GC_SysVGetDataStart(0x100000, _etext) - /* libc_stack_end is not set reliably for sparc64 */ -# define STACKBOTTOM ((ptr_t) 0x80000000000ULL) -# else -# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, _etext) -# define LINUX_STACKBOTTOM -# endif -# endif -# ifdef OPENBSD -# define OS_TYPE "OPENBSD" -# define STACKBOTTOM ((ptr_t) 0xf8000000) - extern int etext[]; -# define DATASTART ((ptr_t)(etext)) -# endif -# ifdef NETBSD -# define OS_TYPE "NETBSD" -# define HEURISTIC2 -# ifdef __ELF__ -# define DATASTART GC_data_start -# define DYNAMIC_LOADING -# else - extern char etext[]; -# define DATASTART ((ptr_t)(etext)) -# endif -# 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 HAVE_BUILTIN_UNWIND_INIT -# define USE_GENERIC_PUSH_REGS -# 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 BEOS -# define OS_TYPE "BEOS" -# include <OS.h> -# define GETPAGESIZE() B_PAGE_SIZE - extern int etext[]; -# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff)) -# endif -# ifdef SUNOS5 -# define OS_TYPE "SUNOS5" - extern int _etext[], _end[]; - extern char * GC_SysVGetDataStart(); -# define DATASTART GC_SysVGetDataStart(0x1000, _etext) -# define DATAEND (_end) -/* # define STACKBOTTOM ((ptr_t)(_start)) worked through 2.7, */ -/* but reportedly breaks under 2.8. It appears that the stack */ -/* base is a property of the executable, so this should not break */ -/* old executables. */ -/* HEURISTIC2 probably works, but this appears to be preferable. */ -# include <sys/vm.h> -# define STACKBOTTOM USRSTACK -/* At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */ -/* It appears to be fixed in 2.8 and 2.9. */ -# ifdef SOLARIS25_PROC_VDB_BUG_FIXED -# define PROC_VDB -# endif -# define DYNAMIC_LOADING -# if !defined(USE_MMAP) && defined(REDIRECT_MALLOC) -# define USE_MMAP - /* Otherwise we now use calloc. Mmap may result in the */ - /* heap interleaved with thread stacks, which can result in */ - /* excessive blacklisting. Sbrk is unusable since it */ - /* doesn't interact correctly with the system malloc. */ -# 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 DGUX -# define OS_TYPE "DGUX" - extern int _etext, _end; - extern char * GC_SysVGetDataStart(); -# define DATASTART GC_SysVGetDataStart(0x1000, &_etext) -# define DATAEND (&_end) -# define STACK_GROWS_DOWN -# define HEURISTIC2 -# include <unistd.h> -# define GETPAGESIZE() sysconf(_SC_PAGESIZE) -# define DYNAMIC_LOADING -# ifndef USE_MMAP -# define USE_MMAP -# endif /* USE_MMAP */ -# define MAP_FAILED (void *) -1 -# ifdef USE_MMAP -# define HEAP_START (ptr_t)0x40000000 -# else /* USE_MMAP */ -# define HEAP_START DATAEND -# endif /* USE_MMAP */ -# endif /* DGUX */ - -# ifdef LINUX -# ifndef __GNUC__ - /* The Intel compiler doesn't like inline assembly */ -# define USE_GENERIC_PUSH_REGS -# endif -# 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(GC_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 -# define HEAP_START 0x1000 - /* This encourages mmap to give us low addresses, */ - /* thus allowing the heap to grow to ~3GB */ -# 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 */ -# define USE_GENERIC_PUSH_REGS -# 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 MSWINCE -# define OS_TYPE "MSWINCE" -# 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" -# ifndef GC_FREEBSD_THREADS -# define MPROTECT_VDB -# endif -# define SIG_SUSPEND SIGUSR1 -# define SIG_THR_RESTART SIGUSR2 -# define FREEBSD_STACKBOTTOM -# ifdef __ELF__ -# define DYNAMIC_LOADING -# endif - extern char etext[]; -# define DATASTART ((ptr_t)(etext)) -# endif -# ifdef NETBSD -# define OS_TYPE "NETBSD" -# ifdef __ELF__ -# define DYNAMIC_LOADING -# endif -# endif -# ifdef THREE86BSD -# define OS_TYPE "THREE86BSD" -# endif -# ifdef BSDI -# define OS_TYPE "BSDI" -# endif -# if defined(OPENBSD) || 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 -# ifdef HURD -# define OS_TYPE "HURD" -# define STACK_GROWS_DOWN -# define HEURISTIC2 - extern int __data_start[]; -# define DATASTART ( (ptr_t) (__data_start)) - extern int _end[]; -# define DATAEND ( (ptr_t) (_end)) -/* # define MPROTECT_VDB Not quite working yet? */ -# define DYNAMIC_LOADING -# 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" -# ifdef LINUX - /* This was developed for a linuxce style platform. Probably */ - /* needs to be tweaked for workstation class machines. */ -# define OS_TYPE "LINUX" -# define DYNAMIC_LOADING - extern int _end[]; -# define DATAEND (_end) - extern int __data_start[]; -# define DATASTART ((ptr_t)(__data_start)) -# define ALIGNMENT 4 -# define USE_GENERIC_PUSH_REGS -# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 2 || __GLIBC__ > 2 -# define LINUX_STACKBOTTOM -# else -# define STACKBOTTOM 0x80000000 -# endif -# endif /* Linux */ -# ifdef EWS4800 -# define HEURISTIC2 -# if defined(_MIPS_SZPTR) && (_MIPS_SZPTR == 64) - extern int _fdata[], _end[]; -# define DATASTART ((ptr_t)_fdata) -# define DATAEND ((ptr_t)_end) -# define CPP_WORDSZ _MIPS_SZPTR -# define ALIGNMENT (_MIPS_SZPTR/8) -# else - extern int etext[], edata[], end[]; - extern int _DYNAMIC_LINKING[], _gp[]; -# define DATASTART ((ptr_t)((((word)etext + 0x3ffff) & ~0x3ffff) \ - + ((word)etext & 0xffff))) -# define DATAEND (edata) -# define DATASTART2 (_DYNAMIC_LINKING \ - ? (ptr_t)(((word)_gp + 0x8000 + 0x3ffff) & ~0x3ffff) \ - : (ptr_t)edata) -# define DATAEND2 (end) -# define ALIGNMENT 4 -# endif -# define OS_TYPE "EWS4800" -# define USE_GENERIC_PUSH_REGS 1 -# endif -# 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 -# ifdef MSWINCE -# define OS_TYPE "MSWINCE" -# define ALIGNMENT 4 -# define DATAEND /* not needed */ -# endif -# if defined(NETBSD) - /* This also checked for __MIPSEL__ . Why? NETBSD recognition */ - /* should be handled at the top of the file. */ -# define ALIGNMENT 4 -# define OS_TYPE "NETBSD" -# define HEURISTIC2 -# define USE_GENERIC_PUSH_REGS -# ifdef __ELF__ - extern int etext[]; -# define DATASTART GC_data_start -# define NEED_FIND_LIMIT -# define DYNAMIC_LOADING -# else -# define DATASTART ((ptr_t) 0x10000000) -# define STACKBOTTOM ((ptr_t) 0x7ffff000) -# endif /* _ELF_ */ -# endif -# endif - -# ifdef RS6000 -# define MACH_TYPE "RS6000" -# ifdef __64BIT__ -# define ALIGNMENT 8 -# define CPP_WORDSZ 64 -# define STACKBOTTOM 0x1000000000000000 -# else -# define ALIGNMENT 4 -# define CPP_WORDSZ 32 -# define STACKBOTTOM ((ptr_t)((ulong)&errno)) -# endif - extern int _data[], _end[]; -# define DATASTART ((ptr_t)((ulong)_data)) -# define DATAEND ((ptr_t)((ulong)_end)) - extern int errno; -# define USE_GENERIC_PUSH_REGS -# define DYNAMIC_LOADING - /* For really old versions of AIX, this may have to be removed. */ -# endif - -# ifdef HP_PA -# define MACH_TYPE "HP_PA" -# ifdef __LP64__ -# define CPP_WORDSZ 64 -# define ALIGNMENT 8 -# else -# define CPP_WORDSZ 32 -# define ALIGNMENT 4 -# define ALIGN_DOUBLE -# endif -# if !defined(GC_HPUX_THREADS) && !defined(GC_LINUX_THREADS) -# ifndef LINUX /* For now. */ -# define MPROTECT_VDB -# endif -# else -# define GENERIC_COMPARE_AND_SWAP - /* No compare-and-swap instruction. Use pthread mutexes */ - /* when we absolutely have to. */ -# ifdef PARALLEL_MARK -# define USE_MARK_BYTES - /* Minimize compare-and-swap usage. */ -# endif -# endif -# define STACK_GROWS_UP -# ifdef HPUX -# define OS_TYPE "HPUX" - 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. Note that the GC must be initialized before the */ - /* first putenv call. */ - extern char ** environ; -# define STACKBOTTOM ((ptr_t)environ) -# endif -# define DYNAMIC_LOADING -# include <unistd.h> -# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE) -# ifndef __GNUC__ -# define PREFETCH(x) { \ - register long addr = (long)(x); \ - (void) _asm ("LDW", 0, 0, addr, 0); \ - } -# endif -# endif /* HPUX */ -# ifdef LINUX -# define OS_TYPE "LINUX" -# define LINUX_STACKBOTTOM -# define DYNAMIC_LOADING -# define SEARCH_FOR_DATA_START - extern int _end[]; -# define DATAEND (&_end) -# endif /* LINUX */ -# endif /* HP_PA */ - -# ifdef ALPHA -# define MACH_TYPE "ALPHA" -# define ALIGNMENT 8 -# ifndef LINUX -# 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. */ -# endif -# ifdef NETBSD -# define OS_TYPE "NETBSD" -# define HEURISTIC2 -# define DATASTART GC_data_start -# define ELFCLASS32 32 -# define ELFCLASS64 64 -# define ELF_CLASS ELFCLASS64 -# define CPP_WORDSZ 64 -# define DYNAMIC_LOADING -# endif -# ifdef OPENBSD -# define OS_TYPE "OPENBSD" -# define HEURISTIC2 -# define CPP_WORDSZ 64 -# ifdef __ELF__ /* since OpenBSD/Alpha 2.9 */ -# define DATASTART GC_data_start -# define ELFCLASS32 32 -# define ELFCLASS64 64 -# define ELF_CLASS ELFCLASS64 -# else /* ECOFF, until OpenBSD/Alpha 2.7 */ -# define DATASTART ((ptr_t) 0x140000000) -# endif -# endif -# ifdef FREEBSD -# define OS_TYPE "FREEBSD" -/* MPROTECT_VDB is not yet supported at all on FreeBSD/alpha. */ -# define SIG_SUSPEND SIGUSR1 -# define SIG_THR_RESTART SIGUSR2 -# define FREEBSD_STACKBOTTOM -# ifdef __ELF__ -# define DYNAMIC_LOADING -# endif -/* Handle unmapped hole alpha*-*-freebsd[45]* puts between etext and edata. */ - extern char etext[]; - extern char edata[]; - extern char end[]; -# define NEED_FIND_LIMIT -# define DATASTART ((ptr_t)(&etext)) -# define DATAEND (GC_find_limit (DATASTART, TRUE)) -# define DATASTART2 ((ptr_t)(&edata)) -# define DATAEND2 ((ptr_t)(&end)) -# define CPP_WORDSZ 64 -# endif -# ifdef OSF1 -# define OS_TYPE "OSF1" -# define DATASTART ((ptr_t) 0x140000000) - extern int _end[]; -# define DATAEND ((ptr_t) &_end) - extern char ** environ; - /* round up from the value of environ to the nearest page boundary */ - /* Probably breaks if putenv is called before collector */ - /* initialization. */ -# define STACKBOTTOM ((ptr_t)(((word)(environ) | (getpagesize()-1))+1)) -/* # define HEURISTIC2 */ - /* Normally HEURISTIC2 is too conervative, since */ - /* the text segment immediately follows the stack. */ - /* Hence we give an upper pound. */ - /* This is currently unused, since we disabled HEURISTIC2 */ - 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 SEARCH_FOR_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 IA64 -# define MACH_TYPE "IA64" -# define USE_GENERIC_PUSH_REGS - /* We need to get preserved registers in addition to register */ - /* windows. That's easiest to do with setjmp. */ -# ifdef PARALLEL_MARK -# define USE_MARK_BYTES - /* Compare-and-exchange is too expensive to use for */ - /* setting mark bits. */ -# endif -# ifdef HPUX -# ifdef _ILP32 -# define CPP_WORDSZ 32 -# define ALIGN_DOUBLE - /* Requires 8 byte alignment for malloc */ -# define ALIGNMENT 4 -# else -# ifndef _LP64 - ---> unknown ABI -# endif -# define CPP_WORDSZ 64 -# define ALIGN_DOUBLE - /* Requires 16 byte alignment for malloc */ -# define ALIGNMENT 8 -# endif -# define OS_TYPE "HPUX" - extern int __data_start[]; -# define DATASTART ((ptr_t)(__data_start)) - /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */ - /* to this. Note that the GC must be initialized before the */ - /* first putenv call. */ - extern char ** environ; -# define STACKBOTTOM ((ptr_t)environ) -# define DYNAMIC_LOADING -# include <unistd.h> -# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE) - /* The following was empirically determined, and is probably */ - /* not very robust. */ - /* Note that the backing store base seems to be at a nice */ - /* address minus one page. */ -# define BACKING_STORE_DISPLACEMENT 0x1000000 -# define BACKING_STORE_ALIGNMENT 0x1000 -# define BACKING_STORE_BASE \ - (ptr_t)(((word)GC_stackbottom - BACKING_STORE_DISPLACEMENT - 1) \ - & ~(BACKING_STORE_ALIGNMENT - 1)) -# endif -# ifdef LINUX -# define CPP_WORDSZ 64 -# define ALIGN_DOUBLE - /* Requires 16 byte alignment for malloc */ -# define ALIGNMENT 8 -# define OS_TYPE "LINUX" - /* The following works on NUE and older kernels: */ -/* # define STACKBOTTOM ((ptr_t) 0xa000000000000000l) */ - /* This does not work on NUE: */ -# define LINUX_STACKBOTTOM - /* We also need the base address of the register stack */ - /* backing store. This is computed in */ - /* GC_linux_register_stack_base based on the following */ - /* constants: */ -# define BACKING_STORE_ALIGNMENT 0x100000 -# define BACKING_STORE_DISPLACEMENT 0x80000000 - extern char * GC_register_stackbottom; -# define BACKING_STORE_BASE ((ptr_t)GC_register_stackbottom) -# define SEARCH_FOR_DATA_START -# ifdef __GNUC__ -# define DYNAMIC_LOADING -# else - /* In the Intel compiler environment, we seem to end up with */ - /* statically linked executables and an undefined reference */ - /* to _DYNAMIC */ -# endif -# define MPROTECT_VDB - /* Requires Linux 2.3.47 or later. */ - extern int _end[]; -# define DATAEND (_end) -# ifdef __GNUC__ -# 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 -# 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 ALIGNMENT 4 /* Required by hardware */ -# define USE_GENERIC_PUSH_REGS -# ifdef UTS4 -# define OS_TYPE "UTS4" - 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 -# ifdef LINUX -# define OS_TYPE "LINUX" -# define HEURISTIC1 -# define DYNAMIC_LOADING - extern int __data_start[]; -# define DATASTART ((ptr_t)(__data_start)) -# endif -# 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 -# ifdef MSWINCE -# define OS_TYPE "MSWINCE" -# define DATAEND /* not needed */ -# endif -# ifdef NOSYS - /* __data_start is usually defined in the target linker script. */ - extern int __data_start[]; -# define DATASTART (ptr_t)(__data_start) -# define USE_GENERIC_PUSH_REGS - /* __stack_base__ is set in newlib/libc/sys/arm/crt0.S */ - extern void *__stack_base__; -# define STACKBOTTOM ((ptr_t) (__stack_base__)) -# endif -#endif - -# ifdef SH -# define MACH_TYPE "SH" -# define ALIGNMENT 4 -# ifdef MSWINCE -# define OS_TYPE "MSWINCE" -# define DATAEND /* not needed */ -# endif -# ifdef LINUX -# define OS_TYPE "LINUX" -# define STACKBOTTOM ((ptr_t) 0x7c000000) -# define USE_GENERIC_PUSH_REGS -# define DYNAMIC_LOADING -# define LINUX_DATA_START - extern int _end[]; -# define DATAEND (_end) -# endif -# endif - -# ifdef SH4 -# define MACH_TYPE "SH4" -# define OS_TYPE "MSWINCE" -# define ALIGNMENT 4 -# define DATAEND /* not needed */ -# 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 - -#if defined(LINUX) && defined(REDIRECT_MALLOC) - /* Rld appears to allocate some memory with its own allocator, and */ - /* some through malloc, which might be redirected. To make this */ - /* work with collectable memory, we have to scan memory allocated */ - /* by rld's internal malloc. */ -# define USE_PROC_FOR_LIBRARIES -#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 defined(SVR4) || defined(LINUX) || defined(IRIX) || defined(HPUX) \ - || defined(OPENBSD) || defined(NETBSD) || defined(FREEBSD) || defined(DGUX) \ - || defined(BSD) || defined(AIX) || defined(MACOSX) || defined(OSF1) -# define UNIX_LIKE /* Basic Unix-like system calls work. */ -# 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 - -# ifdef PARALLEL_MARK -# undef MPROTECT_VDB /* For now. */ -# 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 - -# if defined(SEARCH_FOR_DATA_START) - extern ptr_t GC_data_start; -# define DATASTART GC_data_start -# endif - -# ifndef CLEAR_DOUBLE -# define CLEAR_DOUBLE(x) \ - ((word*)x)[0] = 0; \ - ((word*)x)[1] = 0; -# endif /* CLEAR_DOUBLE */ - - /* Internally we use GC_SOLARIS_THREADS to test for either old or pthreads. */ -# if defined(GC_SOLARIS_PTHREADS) && !defined(GC_SOLARIS_THREADS) -# define GC_SOLARIS_THREADS -# endif - -# if defined(GC_IRIX_THREADS) && !defined(IRIX5) - --> inconsistent configuration -# endif -# if defined(GC_LINUX_THREADS) && !defined(LINUX) - --> inconsistent configuration -# endif -# if defined(GC_SOLARIS_THREADS) && !defined(SUNOS5) - --> inconsistent configuration -# endif -# if defined(GC_HPUX_THREADS) && !defined(HPUX) - --> inconsistent configuration -# endif -# if defined(GC_WIN32_THREADS) && !defined(MSWIN32) - /* Ideally CYGWIN32 should work, in addition to MSWIN32. I suspect */ - /* the necessary code is mostly there, but nobody has actually made */ - /* sure the right combination of pieces is compiled in, etc. */ - --> inconsistent configuration -# endif - -# if defined(PCR) || defined(SRC_M3) || \ - defined(GC_SOLARIS_THREADS) || defined(GC_WIN32_THREADS) || \ - defined(GC_PTHREADS) -# define THREADS -# endif - -# if defined(HP_PA) || defined(M88K) || defined(POWERPC) && !defined(MACOSX) \ - || defined(LINT) || defined(MSWINCE) || defined(ARM32) \ - || (defined(I386) && defined(__LCC__)) - /* Use setjmp based hack to mark from callee-save registers. */ - /* The define should move to the individual platform */ - /* descriptions. */ -# define USE_GENERIC_PUSH_REGS -# endif - -# if defined(SPARC) -# define ASM_CLEAR_CODE /* Stack clearing is crucial, and we */ - /* include assembly code to do it well. */ -# endif - - /* Can we save call chain in objects for debugging? */ - /* SET NFRAMES (# of saved frames) and NARGS (#of args for each frame) */ - /* to reasonable values for the platform. */ - /* Set SAVE_CALL_CHAIN if we can. SAVE_CALL_COUNT can be specified at */ - /* build time, though we feel free to adjust it slightly. */ - /* Define NEED_CALLINFO if we either save the call stack or */ - /* GC_ADD_CALLER is defined. */ -#ifdef LINUX -# include <features.h> -# if __GLIBC__ == 2 && __GLIBC_MINOR__ >= 1 || __GLIBC__ > 2 -# define HAVE_BUILTIN_BACKTRACE -# endif -#endif - -#if defined(SPARC) -# define CAN_SAVE_CALL_STACKS -# define CAN_SAVE_CALL_ARGS -#endif -#if defined(I386) && defined(LINUX) - /* SAVE_CALL_CHAIN is supported if the code is compiled to save */ - /* frame pointers by default, i.e. no -fomit-frame-pointer flag. */ -# define CAN_SAVE_CALL_STACKS -# define CAN_SAVE_CALL_ARGS -#endif -#if defined(HAVE_BUILTIN_BACKTRACE) && !defined(CAN_SAVE_CALL_STACKS) -# define CAN_SAVE_CALL_STACKS -#endif - -# if defined(SAVE_CALL_COUNT) && !defined(GC_ADD_CALLER) \ - && defined(CAN_SAVE_CALL_STACKS) -# define SAVE_CALL_CHAIN -# endif -# ifdef SAVE_CALL_CHAIN -# if defined(SAVE_CALL_NARGS) && defined(CAN_SAVE_CALL_ARGS) -# define NARGS SAVE_CALL_NARGS -# else -# define NARGS 0 /* Number of arguments to save for each call. */ -# endif -# endif -# ifdef SAVE_CALL_CHAIN -# ifndef SAVE_CALL_COUNT -# define NFRAMES 6 /* Number of frames to save. Even for */ - /* alignment reasons. */ -# else -# define NFRAMES ((SAVE_CALL_COUNT + 1) & ~1) -# endif -# define NEED_CALLINFO -# endif /* SAVE_CALL_CHAIN */ -# ifdef GC_ADD_CALLER -# define NFRAMES 1 -# define NARGS 0 -# define NEED_CALLINFO -# endif - -# if defined(MAKE_BACK_GRAPH) && !defined(DBG_HDRS_ALL) -# define DBG_HDRS_ALL -# endif - -#ifdef GC_PRIVATE_H - /* This relies on some type definitions from gc_priv.h, from */ - /* where it's normally included. */ - /* */ - /* How to get heap memory from the OS: */ - /* Note that sbrk()-like allocation is preferred, since it */ - /* usually makes it possible to merge consecutively allocated */ - /* chunks. It also avoids unintented recursion with */ - /* -DREDIRECT_MALLOC. */ - /* GET_MEM() returns a HLKSIZE aligned chunk. */ - /* 0 is taken to mean failure. */ - /* In the case os USE_MMAP, the argument must also be a */ - /* physical page size. */ - /* GET_MEM is currently not assumed to retrieve 0 filled space, */ - /* though we should perhaps take advantage of the case in which */ - /* does. */ - struct hblk; /* See gc_priv.h. */ -# ifdef PCR - char * real_malloc(); -# define GET_MEM(bytes) HBLKPTR(real_malloc((size_t)bytes + GC_page_size) \ - + GC_page_size-1) -# else -# ifdef OS2 - void * os2_alloc(size_t bytes); -# define GET_MEM(bytes) HBLKPTR((ptr_t)os2_alloc((size_t)bytes \ - + GC_page_size) \ - + GC_page_size-1) -# else -# if defined(NEXT) || defined(MACOSX) || defined(DOS4GW) || \ - (defined(AMIGA) && !defined(GC_AMIGA_FASTALLOC)) || \ - (defined(SUNOS5) && !defined(USE_MMAP)) -# define GET_MEM(bytes) HBLKPTR((size_t) \ - calloc(1, (size_t)bytes + GC_page_size) \ - + GC_page_size-1) -# else -# ifdef MSWIN32 - extern ptr_t GC_win32_get_mem(); -# define GET_MEM(bytes) (struct hblk *)GC_win32_get_mem(bytes) -# else -# ifdef MACOS -# if defined(USE_TEMPORARY_MEMORY) - extern Ptr GC_MacTemporaryNewPtr(size_t size, - Boolean clearMemory); -# define GET_MEM(bytes) HBLKPTR( \ - GC_MacTemporaryNewPtr(bytes + GC_page_size, true) \ - + GC_page_size-1) -# else -# define GET_MEM(bytes) HBLKPTR( \ - NewPtrClear(bytes + GC_page_size) + GC_page_size-1) -# endif -# else -# ifdef MSWINCE - extern ptr_t GC_wince_get_mem(); -# define GET_MEM(bytes) (struct hblk *)GC_wince_get_mem(bytes) -# else -# if defined(AMIGA) && defined(GC_AMIGA_FASTALLOC) - extern void *GC_amiga_get_mem(size_t size); - define GET_MEM(bytes) HBLKPTR((size_t) \ - GC_amiga_get_mem((size_t)bytes + GC_page_size) \ - + GC_page_size-1) -# else - extern ptr_t GC_unix_get_mem(); -# define GET_MEM(bytes) (struct hblk *)GC_unix_get_mem(bytes) -# endif -# endif -# endif -# endif -# endif -# endif -# endif - -#endif /* GC_PRIVATE_H */ - -# endif /* GCCONFIG_H */ |