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Diffstat (limited to 'boehm-gc/gcconfig.h')
| -rw-r--r-- | boehm-gc/gcconfig.h | 1318 |
1 files changed, 1318 insertions, 0 deletions
diff --git a/boehm-gc/gcconfig.h b/boehm-gc/gcconfig.h new file mode 100644 index 00000000000..4c4bca31222 --- /dev/null +++ b/boehm-gc/gcconfig.h @@ -0,0 +1,1318 @@ +/* + * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers + * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved. + * Copyright (c) 1996 by Silicon Graphics. All rights reserved. + * + * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED + * OR IMPLIED. ANY USE IS AT YOUR OWN RISK. + * + * Permission is hereby granted to use or copy this program + * for any purpose, provided the above notices are retained on all copies. + * Permission to modify the code and to distribute modified code is granted, + * provided the above notices are retained, and a notice that the code was + * modified is included with the above copyright notice. + */ + +#ifndef GCCONFIG_H + +# define GCCONFIG_H + +/* Machine dependent parameters. Some tuning parameters can be found */ +/* near the top of gc_private.h. */ + +/* Machine specific parts contributed by various people. See README file. */ + +/* First a unified test for Linux: */ +# if defined(linux) || defined(__linux__) +# define LINUX +# endif + +/* Determine the machine type: */ +# if defined(sun) && defined(mc68000) +# define M68K +# define SUNOS4 +# define mach_type_known +# endif +# if defined(hp9000s300) +# define M68K +# define HP +# define mach_type_known +# endif +# if defined(__OpenBSD__) && defined(m68k) +# define M68K +# define OPENBSD +# define mach_type_known +# endif +# if defined(__OpenBSD__) && defined(__sparc__) +# define SPARC +# define OPENBSD +# define mach_type_known +# endif +# if defined(__NetBSD__) && defined(m68k) +# define M68K +# define NETBSD +# define mach_type_known +# endif +# if defined(__NetBSD__) && defined(arm32) +# define ARM32 +# define NETBSD +# define mach_type_known +# endif +# if defined(vax) +# define VAX +# ifdef ultrix +# define ULTRIX +# else +# define BSD +# endif +# define mach_type_known +# endif +# if defined(mips) || defined(__mips) +# define MIPS +# if !defined(LINUX) +# if defined(ultrix) || defined(__ultrix) || defined(__NetBSD__) +# define ULTRIX +# else +# if defined(_SYSTYPE_SVR4) || defined(SYSTYPE_SVR4) \ + || defined(__SYSTYPE_SVR4__) +# define IRIX5 /* or IRIX 6.X */ +# else +# define RISCOS /* or IRIX 4.X */ +# endif +# endif +# endif /* !LINUX */ +# define mach_type_known +# endif +# if defined(sequent) && defined(i386) +# define I386 +# define SEQUENT +# define mach_type_known +# endif +# if defined(sun) && defined(i386) +# define I386 +# define SUNOS5 +# define mach_type_known +# endif +# if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__) +# define I386 +# define OS2 +# define mach_type_known +# endif +# if defined(ibm032) +# define RT +# define mach_type_known +# endif +# if defined(sun) && (defined(sparc) || defined(__sparc)) +# define SPARC + /* Test for SunOS 5.x */ +# include <errno.h> +# ifdef ECHRNG +# define SUNOS5 +# else +# define SUNOS4 +# endif +# define mach_type_known +# endif +# if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \ + && !defined(__OpenBSD__) +# define SPARC +# define DRSNX +# define mach_type_known +# endif +# if defined(_IBMR2) +# define RS6000 +# define mach_type_known +# endif +# if defined(_M_XENIX) && defined(_M_SYSV) && defined(_M_I386) + /* The above test may need refinement */ +# define I386 +# if defined(_SCO_ELF) +# define SCO_ELF +# else +# define SCO +# endif +# define mach_type_known +# endif +# if defined(_AUX_SOURCE) +# define M68K +# define SYSV +# define mach_type_known +# endif +# if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \ + || defined(hppa) || defined(__hppa__) +# define HP_PA +# ifndef LINUX +# define HPUX +# endif +# define mach_type_known +# endif +# if defined(LINUX) && (defined(i386) || defined(__i386__)) +# define I386 +# define mach_type_known +# endif +# if defined(LINUX) && (defined(__ia64__) || defined(__ia64)) +# define IA64 +# define mach_type_known +# endif +# if defined(LINUX) && defined(powerpc) +# define POWERPC +# define mach_type_known +# endif +# if defined(LINUX) && defined(__mc68000__) +# define M68K +# define mach_type_known +# endif +# if defined(LINUX) && (defined(sparc) || defined(__sparc__)) +# define SPARC +# define mach_type_known +# endif +# if defined(LINUX) && defined(arm) +# define ARM32 +# define mach_type_known +# endif +# if defined(__alpha) || defined(__alpha__) +# define ALPHA +# if !defined(LINUX) +# define OSF1 /* a.k.a Digital Unix */ +# endif +# define mach_type_known +# endif +# if defined(_AMIGA) && !defined(AMIGA) +# define AMIGA +# endif +# ifdef AMIGA +# define M68K +# define mach_type_known +# endif +# if defined(THINK_C) || defined(__MWERKS__) && !defined(__powerc) +# define M68K +# define MACOS +# define mach_type_known +# endif +# if defined(__MWERKS__) && defined(__powerc) +# define POWERPC +# define MACOS +# define mach_type_known +# endif +# if defined(macosx) +# define MACOSX +# define POWERPC +# define mach_type_known +# endif +# if defined(NeXT) && defined(mc68000) +# define M68K +# define NEXT +# define mach_type_known +# endif +# if defined(NeXT) && defined(i386) +# define I386 +# define NEXT +# define mach_type_known +# endif +# if defined(__OpenBSD__) && defined(i386) +# define I386 +# define OPENBSD +# define mach_type_known +# endif +# if defined(__FreeBSD__) && defined(i386) +# define I386 +# define FREEBSD +# define mach_type_known +# endif +# if defined(__NetBSD__) && defined(i386) +# define I386 +# define NETBSD +# define mach_type_known +# endif +# if defined(bsdi) && defined(i386) +# define I386 +# define BSDI +# define mach_type_known +# endif +# if !defined(mach_type_known) && defined(__386BSD__) +# define I386 +# define THREE86BSD +# define mach_type_known +# endif +# if defined(_CX_UX) && defined(_M88K) +# define M88K +# define CX_UX +# define mach_type_known +# endif +# if defined(DGUX) +# define M88K + /* DGUX defined */ +# define mach_type_known +# endif +# if (defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300) \ + || defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__) +# define I386 +# define MSWIN32 /* or Win32s */ +# define mach_type_known +# endif +# if defined(__DJGPP__) +# define I386 +# ifndef DJGPP +# define DJGPP /* MSDOS running the DJGPP port of GCC */ +# endif +# define mach_type_known +# endif +# if defined(__CYGWIN32__) || defined(__CYGWIN__) +# define I386 +# define CYGWIN32 +# define mach_type_known +# endif +# if defined(__MINGW32__) +# define I386 +# define MSWIN32 +# define mach_type_known +# endif +# if defined(__BORLANDC__) +# define I386 +# define MSWIN32 +# define mach_type_known +# endif +# if defined(_UTS) && !defined(mach_type_known) +# define S370 +# define UTS4 +# define mach_type_known +# endif +# if defined(__pj__) +# define PJ +# define mach_type_known +# endif +/* Ivan Demakov */ +# if defined(__WATCOMC__) && defined(__386__) +# define I386 +# if !defined(OS2) && !defined(MSWIN32) && !defined(DOS4GW) +# if defined(__OS2__) +# define OS2 +# else +# if defined(__WINDOWS_386__) || defined(__NT__) +# define MSWIN32 +# else +# define DOS4GW +# endif +# endif +# endif +# define mach_type_known +# endif + +/* Feel free to add more clauses here */ + +/* Or manually define the machine type here. A machine type is */ +/* characterized by the architecture. Some */ +/* machine types are further subdivided by OS. */ +/* the macros ULTRIX, RISCOS, and BSD to distinguish. */ +/* Note that SGI IRIX is treated identically to RISCOS. */ +/* SYSV on an M68K actually means A/UX. */ +/* The distinction in these cases is usually the stack starting address */ +# ifndef mach_type_known + --> unknown machine type +# endif + /* Mapping is: M68K ==> Motorola 680X0 */ + /* (SUNOS4,HP,NEXT, and SYSV (A/UX), */ + /* MACOS and AMIGA variants) */ + /* I386 ==> Intel 386 */ + /* (SEQUENT, OS2, SCO, LINUX, NETBSD, */ + /* FREEBSD, THREE86BSD, MSWIN32, */ + /* BSDI,SUNOS5, NEXT, other variants) */ + /* NS32K ==> Encore Multimax */ + /* MIPS ==> R2000 or R3000 */ + /* (RISCOS, ULTRIX variants) */ + /* VAX ==> DEC VAX */ + /* (BSD, ULTRIX variants) */ + /* RS6000 ==> IBM RS/6000 AIX3.X */ + /* RT ==> IBM PC/RT */ + /* HP_PA ==> HP9000/700 & /800 */ + /* HP/UX */ + /* SPARC ==> SPARC under SunOS */ + /* (SUNOS4, SUNOS5, */ + /* DRSNX variants) */ + /* ALPHA ==> DEC Alpha */ + /* (OSF1 and LINUX variants) */ + /* M88K ==> Motorola 88XX0 */ + /* (CX_UX and DGUX) */ + /* S370 ==> 370-like machine */ + /* running Amdahl UTS4 */ + /* ARM32 ==> Intel StrongARM */ + /* IA64 ==> Intel IA64 */ + /* (e.g. Itanium) */ + + +/* + * For each architecture and OS, the following need to be defined: + * + * CPP_WORD_SZ is a simple integer constant representing the word size. + * in bits. We assume byte addressibility, where a byte has 8 bits. + * We also assume CPP_WORD_SZ is either 32 or 64. + * (We care about the length of pointers, not hardware + * bus widths. Thus a 64 bit processor with a C compiler that uses + * 32 bit pointers should use CPP_WORD_SZ of 32, not 64. Default is 32.) + * + * MACH_TYPE is a string representation of the machine type. + * OS_TYPE is analogous for the OS. + * + * ALIGNMENT is the largest N, such that + * all pointer are guaranteed to be aligned on N byte boundaries. + * defining it to be 1 will always work, but perform poorly. + * + * DATASTART is the beginning of the data segment. + * On UNIX systems, the collector will scan the area between DATASTART + * and DATAEND for root pointers. + * + * DATAEND, if not &end. + * + * ALIGN_DOUBLE of GC_malloc should return blocks aligned to twice + * the pointer size. + * + * STACKBOTTOM is the cool end of the stack, which is usually the + * highest address in the stack. + * Under PCR or OS/2, we have other ways of finding thread stacks. + * For each machine, the following should: + * 1) define STACK_GROWS_UP if the stack grows toward higher addresses, and + * 2) define exactly one of + * STACKBOTTOM (should be defined to be an expression) + * HEURISTIC1 + * HEURISTIC2 + * If either of the last two macros are defined, then STACKBOTTOM is computed + * during collector startup using one of the following two heuristics: + * HEURISTIC1: Take an address inside GC_init's frame, and round it up to + * the next multiple of STACK_GRAN. + * HEURISTIC2: Take an address inside GC_init's frame, increment it repeatedly + * in small steps (decrement if STACK_GROWS_UP), and read the value + * at each location. Remember the value when the first + * Segmentation violation or Bus error is signalled. Round that + * to the nearest plausible page boundary, and use that instead + * of STACKBOTTOM. + * + * If no expression for STACKBOTTOM can be found, and neither of the above + * heuristics are usable, the collector can still be used with all of the above + * undefined, provided one of the following is done: + * 1) GC_mark_roots can be changed to somehow mark from the correct stack(s) + * without reference to STACKBOTTOM. This is appropriate for use in + * conjunction with thread packages, since there will be multiple stacks. + * (Allocating thread stacks in the heap, and treating them as ordinary + * heap data objects is also possible as a last resort. However, this is + * likely to introduce significant amounts of excess storage retention + * unless the dead parts of the thread stacks are periodically cleared.) + * 2) Client code may set GC_stackbottom before calling any GC_ routines. + * If the author of the client code controls the main program, this is + * easily accomplished by introducing a new main program, setting + * GC_stackbottom to the address of a local variable, and then calling + * the original main program. The new main program would read something + * like: + * + * # include "gc_private.h" + * + * main(argc, argv, envp) + * int argc; + * char **argv, **envp; + * { + * int dummy; + * + * GC_stackbottom = (ptr_t)(&dummy); + * return(real_main(argc, argv, envp)); + * } + * + * + * Each architecture may also define the style of virtual dirty bit + * implementation to be used: + * MPROTECT_VDB: Write protect the heap and catch faults. + * PROC_VDB: Use the SVR4 /proc primitives to read dirty bits. + * + * An architecture may define DYNAMIC_LOADING if dynamic_load.c + * defined GC_register_dynamic_libraries() for the architecture. + * + * An architecture may define PREFETCH(x) to preload the cache with *x. + * This defaults to a no-op. + * + * PREFETCH_FOR_WRITE(x) is used if *x is about to be written. + * + * An architecture may also define CLEAR_DOUBLE(x) to be a fast way to + * clear the two words at GC_malloc-aligned address x. By default, + * word stores of 0 are used instead. + */ + + +# define STACK_GRAN 0x1000000 +# ifdef M68K +# define MACH_TYPE "M68K" +# define ALIGNMENT 2 +# ifdef OPENBSD +# define OS_TYPE "OPENBSD" +# define HEURISTIC2 + extern char etext; +# define DATASTART ((ptr_t)(&etext)) +# endif +# ifdef NETBSD +# define OS_TYPE "NETBSD" +# define HEURISTIC2 + extern char etext; +# define DATASTART ((ptr_t)(&etext)) +# endif +# ifdef LINUX +# define OS_TYPE "LINUX" +# define STACKBOTTOM ((ptr_t)0xf0000000) +# define MPROTECT_VDB +# ifdef __ELF__ +# define DYNAMIC_LOADING + extern char **__environ; +# define DATASTART ((ptr_t)(&__environ)) + /* hideous kludge: __environ is the first */ + /* word in crt0.o, and delimits the start */ + /* of the data segment, no matter which */ + /* ld options were passed through. */ + /* We could use _etext instead, but that */ + /* would include .rodata, which may */ + /* contain large read-only data tables */ + /* that we'd rather not scan. */ + extern int _end; +# define DATAEND (&_end) +# else + extern int etext; +# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff)) +# endif +# endif +# ifdef SUNOS4 +# define OS_TYPE "SUNOS4" + extern char etext; +# define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ffff) & ~0x1ffff)) +# define HEURISTIC1 /* differs */ +# define DYNAMIC_LOADING +# endif +# ifdef HP +# define OS_TYPE "HP" + extern char etext; +# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff)) +# define STACKBOTTOM ((ptr_t) 0xffeffffc) + /* empirically determined. seems to work. */ +# include <unistd.h> +# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE) +# endif +# ifdef SYSV +# define OS_TYPE "SYSV" + extern etext; +# define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \ + & ~0x3fffff) \ + +((word)&etext & 0x1fff)) + /* This only works for shared-text binaries with magic number 0413. + The other sorts of SysV binaries put the data at the end of the text, + in which case the default of &etext would work. Unfortunately, + handling both would require having the magic-number available. + -- Parag + */ +# define STACKBOTTOM ((ptr_t)0xFFFFFFFE) + /* The stack starts at the top of memory, but */ + /* 0x0 cannot be used as setjump_test complains */ + /* that the stack direction is incorrect. Two */ + /* bytes down from 0x0 should be safe enough. */ + /* --Parag */ +# include <sys/mmu.h> +# define GETPAGESIZE() PAGESIZE /* Is this still right? */ +# endif +# ifdef AMIGA +# define OS_TYPE "AMIGA" + /* STACKBOTTOM and DATASTART handled specially */ + /* in os_dep.c */ +# define DATAEND /* not needed */ +# define GETPAGESIZE() 4096 +# endif +# ifdef MACOS +# ifndef __LOWMEM__ +# include <LowMem.h> +# endif +# define OS_TYPE "MACOS" + /* see os_dep.c for details of global data segments. */ +# define STACKBOTTOM ((ptr_t) LMGetCurStackBase()) +# define DATAEND /* not needed */ +# define GETPAGESIZE() 4096 +# endif +# ifdef NEXT +# define OS_TYPE "NEXT" +# define DATASTART ((ptr_t) get_etext()) +# define STACKBOTTOM ((ptr_t) 0x4000000) +# define DATAEND /* not needed */ +# endif +# endif + +# ifdef POWERPC +# define MACH_TYPE "POWERPC" +# ifdef MACOS +# define ALIGNMENT 2 /* Still necessary? Could it be 4? */ +# ifndef __LOWMEM__ +# include <LowMem.h> +# endif +# define OS_TYPE "MACOS" + /* see os_dep.c for details of global data segments. */ +# define STACKBOTTOM ((ptr_t) LMGetCurStackBase()) +# define DATAEND /* not needed */ +# endif +# ifdef LINUX +# define ALIGNMENT 4 /* Guess. Can someone verify? */ + /* This was 2, but that didn't sound right. */ +# define OS_TYPE "LINUX" +# define HEURISTIC1 +# undef STACK_GRAN +# define STACK_GRAN 0x10000000 + /* Stack usually starts at 0x80000000 */ +# define LINUX_DATA_START + extern int _end; +# define DATAEND (&_end) +# endif +# ifdef MACOSX +# define ALIGNMENT 4 +# define OS_TYPE "MACOSX" +# define DATASTART ((ptr_t) get_etext()) +# define STACKBOTTOM ((ptr_t) 0xc0000000) +# define DATAEND /* not needed */ +# endif +# endif + +# ifdef VAX +# define MACH_TYPE "VAX" +# define ALIGNMENT 4 /* Pointers are longword aligned by 4.2 C compiler */ + extern char etext; +# define DATASTART ((ptr_t)(&etext)) +# ifdef BSD +# define OS_TYPE "BSD" +# define HEURISTIC1 + /* HEURISTIC2 may be OK, but it's hard to test. */ +# endif +# ifdef ULTRIX +# define OS_TYPE "ULTRIX" +# define STACKBOTTOM ((ptr_t) 0x7fffc800) +# endif +# endif + +# ifdef RT +# define MACH_TYPE "RT" +# define ALIGNMENT 4 +# define DATASTART ((ptr_t) 0x10000000) +# define STACKBOTTOM ((ptr_t) 0x1fffd800) +# endif + +# ifdef SPARC +# define MACH_TYPE "SPARC" +# define ALIGNMENT 4 /* Required by hardware */ +# define ALIGN_DOUBLE + extern int etext; +# ifdef SUNOS5 +# define OS_TYPE "SUNOS5" + extern int _etext; + extern int _end; + extern char * GC_SysVGetDataStart(); +# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext) +# define DATAEND (&_end) +# ifndef USE_MMAP +# define USE_MMAP +# endif +# ifdef USE_MMAP +# define HEAP_START (ptr_t)0x40000000 +# else +# define HEAP_START DATAEND +# endif +# define PROC_VDB +/* HEURISTIC1 reportedly no longer works under 2.7. Thus we */ +/* switched to HEURISTIC2, eventhough it creates some debugging */ +/* issues. */ +# define HEURISTIC2 +# include <unistd.h> +# define GETPAGESIZE() sysconf(_SC_PAGESIZE) + /* getpagesize() appeared to be missing from at least one */ + /* Solaris 5.4 installation. Weird. */ +# define DYNAMIC_LOADING +# endif +# ifdef SUNOS4 +# define OS_TYPE "SUNOS4" + /* [If you have a weak stomach, don't read this.] */ + /* We would like to use: */ +/* # define DATASTART ((ptr_t)((((word) (&etext)) + 0x1fff) & ~0x1fff)) */ + /* This fails occasionally, due to an ancient, but very */ + /* persistent ld bug. &etext is set 32 bytes too high. */ + /* We instead read the text segment size from the a.out */ + /* header, which happens to be mapped into our address space */ + /* at the start of the text segment. The detective work here */ + /* was done by Robert Ehrlich, Manuel Serrano, and Bernard */ + /* Serpette of INRIA. */ + /* This assumes ZMAGIC, i.e. demand-loadable executables. */ +# define TEXTSTART 0x2000 +# define DATASTART ((ptr_t)(*(int *)(TEXTSTART+0x4)+TEXTSTART)) +# define MPROTECT_VDB +# define HEURISTIC1 +# define DYNAMIC_LOADING +# endif +# ifdef DRSNX +# define CPP_WORDSZ 32 +# define OS_TYPE "DRSNX" + extern char * GC_SysVGetDataStart(); + extern int etext; +# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &etext) +# define MPROTECT_VDB +# define STACKBOTTOM ((ptr_t) 0xdfff0000) +# define DYNAMIC_LOADING +# endif +# ifdef LINUX +# define OS_TYPE "LINUX" +# ifdef __ELF__ +# define LINUX_DATA_START +# define DYNAMIC_LOADING +# else + Linux Sparc non elf ? +# endif + extern int _end; +# define DATAEND (&_end) +# define SVR4 +# define STACKBOTTOM ((ptr_t) 0xf0000000) +# endif +# ifdef OPENBSD +# define OS_TYPE "OPENBSD" +# define STACKBOTTOM ((ptr_t) 0xf8000000) +# define DATASTART ((ptr_t)(&etext)) +# endif +# endif + +# ifdef I386 +# define MACH_TYPE "I386" +# define ALIGNMENT 4 /* Appears to hold for all "32 bit" compilers */ + /* except Borland. The -a4 option fixes */ + /* Borland. */ + /* Ivan Demakov: For Watcom the option is -zp4. */ +# ifndef SMALL_CONFIG +# define ALIGN_DOUBLE /* Not strictly necessary, but may give speed */ + /* improvement on Pentiums. */ +# endif +# ifdef SEQUENT +# define OS_TYPE "SEQUENT" + extern int etext; +# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff)) +# define STACKBOTTOM ((ptr_t) 0x3ffff000) +# endif +# ifdef SUNOS5 +# define OS_TYPE "SUNOS5" + extern int etext, _start; + extern char * GC_SysVGetDataStart(); +# define DATASTART GC_SysVGetDataStart(0x1000, &etext) +# define STACKBOTTOM ((ptr_t)(&_start)) +/** At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */ +/*# define PROC_VDB*/ +# define DYNAMIC_LOADING +# ifndef USE_MMAP +# define USE_MMAP +# endif +# ifdef USE_MMAP +# define HEAP_START (ptr_t)0x40000000 +# else +# define HEAP_START DATAEND +# endif +# endif +# ifdef SCO +# define OS_TYPE "SCO" + extern int etext; +# define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \ + & ~0x3fffff) \ + +((word)&etext & 0xfff)) +# define STACKBOTTOM ((ptr_t) 0x7ffffffc) +# endif +# ifdef SCO_ELF +# define OS_TYPE "SCO_ELF" + extern int etext; +# define DATASTART ((ptr_t)(&etext)) +# define STACKBOTTOM ((ptr_t) 0x08048000) +# define DYNAMIC_LOADING +# define ELF_CLASS ELFCLASS32 +# endif +# ifdef LINUX +# define OS_TYPE "LINUX" +# define LINUX_STACKBOTTOM +# if 0 +# define HEURISTIC1 +# undef STACK_GRAN +# define STACK_GRAN 0x10000000 + /* STACKBOTTOM is usually 0xc0000000, but this changes with */ + /* different kernel configurations. In particular, systems */ + /* with 2GB physical memory will usually move the user */ + /* address space limit, and hence initial SP to 0x80000000. */ +# endif +# if !defined(LINUX_THREADS) || !defined(REDIRECT_MALLOC) +# define MPROTECT_VDB +# else + /* We seem to get random errors in incremental mode, */ + /* possibly because Linux threads is itself a malloc client */ + /* and can't deal with the signals. */ +# endif +# ifdef __ELF__ +# define DYNAMIC_LOADING +# ifdef UNDEFINED /* includes ro data */ + extern int _etext; +# define DATASTART ((ptr_t)((((word) (&_etext)) + 0xfff) & ~0xfff)) +# endif +# include <features.h> +# if defined(__GLIBC__) && __GLIBC__ >= 2 +# define LINUX_DATA_START +# else + extern char **__environ; +# define DATASTART ((ptr_t)(&__environ)) + /* hideous kludge: __environ is the first */ + /* word in crt0.o, and delimits the start */ + /* of the data segment, no matter which */ + /* ld options were passed through. */ + /* We could use _etext instead, but that */ + /* would include .rodata, which may */ + /* contain large read-only data tables */ + /* that we'd rather not scan. */ +# endif + extern int _end; +# define DATAEND (&_end) +# else + extern int etext; +# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff)) +# endif +# ifdef USE_I686_PREFETCH +# define PREFETCH(x) \ + __asm__ __volatile__ (" prefetchnta %0": : "m"(*(char *)(x))) + /* Empirically prefetcht0 is much more effective at reducing */ + /* cache miss stalls for the targetted load instructions. But it */ + /* seems to interfere enough with other cache traffic that the net */ + /* result is worse than prefetchnta. */ +# if 0 + /* Using prefetches for write seems to have a slight negative */ + /* impact on performance, at least for a PIII/500. */ +# define PREFETCH_FOR_WRITE(x) \ + __asm__ __volatile__ (" prefetcht0 %0": : "m"(*(char *)(x))) +# endif +# endif +# ifdef USE_3DNOW_PREFETCH +# define PREFETCH(x) \ + __asm__ __volatile__ (" prefetch %0": : "m"(*(char *)(x))) +# define PREFETCH_FOR_WRITE(x) + __asm__ __volatile__ (" prefetchw %0": : "m"(*(char *)(x))) +# endif +# endif +# ifdef CYGWIN32 +# define OS_TYPE "CYGWIN32" + extern int _data_start__; + extern int _data_end__; + extern int _bss_start__; + extern int _bss_end__; + /* For binutils 2.9.1, we have */ + /* DATASTART = _data_start__ */ + /* DATAEND = _bss_end__ */ + /* whereas for some earlier versions it was */ + /* DATASTART = _bss_start__ */ + /* DATAEND = _data_end__ */ + /* To get it right for both, we take the */ + /* minumum/maximum of the two. */ +# define MAX(x,y) ((x) > (y) ? (x) : (y)) +# define MIN(x,y) ((x) < (y) ? (x) : (y)) +# define DATASTART ((ptr_t) MIN(&_data_start__, &_bss_start__)) +# define DATAEND ((ptr_t) MAX(&_data_end__, &_bss_end__)) +# undef STACK_GRAN +# define STACK_GRAN 0x10000 +# define HEURISTIC1 +# endif +# ifdef OS2 +# define OS_TYPE "OS2" + /* STACKBOTTOM and DATASTART are handled specially in */ + /* os_dep.c. OS2 actually has the right */ + /* system call! */ +# define DATAEND /* not needed */ +# endif +# ifdef MSWIN32 +# define OS_TYPE "MSWIN32" + /* STACKBOTTOM and DATASTART are handled specially in */ + /* os_dep.c. */ +# ifndef __WATCOMC__ +# define MPROTECT_VDB +# endif +# define DATAEND /* not needed */ +# endif +# ifdef DJGPP +# define OS_TYPE "DJGPP" +# include "stubinfo.h" + extern int etext; + extern int _stklen; + extern int __djgpp_stack_limit; +# define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ff) & ~0x1ff)) +/* # define STACKBOTTOM ((ptr_t)((word) _stubinfo + _stubinfo->size \ + + _stklen)) */ +# define STACKBOTTOM ((ptr_t)((word) __djgpp_stack_limit + _stklen)) + /* This may not be right. */ +# endif +# ifdef OPENBSD +# define OS_TYPE "OPENBSD" +# endif +# ifdef FREEBSD +# define OS_TYPE "FREEBSD" +# define MPROTECT_VDB +# endif +# ifdef NETBSD +# define OS_TYPE "NETBSD" +# endif +# ifdef THREE86BSD +# define OS_TYPE "THREE86BSD" +# endif +# ifdef BSDI +# define OS_TYPE "BSDI" +# endif +# if defined(OPENBSD) || defined(FREEBSD) || defined(NETBSD) \ + || defined(THREE86BSD) || defined(BSDI) +# define HEURISTIC2 + extern char etext; +# define DATASTART ((ptr_t)(&etext)) +# endif +# ifdef NEXT +# define OS_TYPE "NEXT" +# define DATASTART ((ptr_t) get_etext()) +# define STACKBOTTOM ((ptr_t)0xc0000000) +# define DATAEND /* not needed */ +# endif +# ifdef DOS4GW +# define OS_TYPE "DOS4GW" + extern long __nullarea; + extern char _end; + extern char *_STACKTOP; + /* Depending on calling conventions Watcom C either precedes + or does not precedes with undescore names of C-variables. + Make sure startup code variables always have the same names. */ + #pragma aux __nullarea "*"; + #pragma aux _end "*"; +# define STACKBOTTOM ((ptr_t) _STACKTOP) + /* confused? me too. */ +# define DATASTART ((ptr_t) &__nullarea) +# define DATAEND ((ptr_t) &_end) +# endif +# endif + +# ifdef NS32K +# define MACH_TYPE "NS32K" +# define ALIGNMENT 4 + extern char **environ; +# define DATASTART ((ptr_t)(&environ)) + /* hideous kludge: environ is the first */ + /* word in crt0.o, and delimits the start */ + /* of the data segment, no matter which */ + /* ld options were passed through. */ +# define STACKBOTTOM ((ptr_t) 0xfffff000) /* for Encore */ +# endif + +# ifdef MIPS +# define MACH_TYPE "MIPS" +/* # define STACKBOTTOM ((ptr_t)0x7fff8000) sometimes also works. */ +# ifdef LINUX + /* This was developed for a linuxce style platform. Probably */ + /* needs to be tweaked for workstation class machines. */ +# define OS_TYPE "LINUX" + extern int __data_start; +# define DATASTART ((ptr_t)(&__data_start)) +# define ALIGNMENT 4 +# define USE_GENERIC_PUSH_REGS 1 +# define STACKBOTTOM 0x80000000 + /* In many cases, this should probably use LINUX_STACKBOTTOM */ + /* instead. But some kernel versions seem to give the wrong */ + /* value from /proc. */ +# endif /* Linux */ +# ifdef ULTRIX +# define HEURISTIC2 +# define DATASTART (ptr_t)0x10000000 + /* Could probably be slightly higher since */ + /* startup code allocates lots of stuff. */ +# define OS_TYPE "ULTRIX" +# define ALIGNMENT 4 +# endif +# ifdef RISCOS +# define HEURISTIC2 +# define DATASTART (ptr_t)0x10000000 +# define OS_TYPE "RISCOS" +# define ALIGNMENT 4 /* Required by hardware */ +# endif +# ifdef IRIX5 +# define HEURISTIC2 + extern int _fdata; +# define DATASTART ((ptr_t)(&_fdata)) +# ifdef USE_MMAP +# define HEAP_START (ptr_t)0x30000000 +# else +# define HEAP_START DATASTART +# endif + /* Lowest plausible heap address. */ + /* In the MMAP case, we map there. */ + /* In either case it is used to identify */ + /* heap sections so they're not */ + /* considered as roots. */ +# define OS_TYPE "IRIX5" +# define MPROTECT_VDB +# ifdef _MIPS_SZPTR +# define CPP_WORDSZ _MIPS_SZPTR +# define ALIGNMENT (_MIPS_SZPTR/8) +# if CPP_WORDSZ != 64 +# define ALIGN_DOUBLE +# endif +# else +# define ALIGNMENT 4 +# define ALIGN_DOUBLE +# endif +# define DYNAMIC_LOADING +# endif +# endif + +# ifdef RS6000 +# define MACH_TYPE "RS6000" +# define ALIGNMENT 4 +# define DATASTART ((ptr_t)0x20000000) + extern int errno; +# define STACKBOTTOM ((ptr_t)((ulong)&errno)) +# define DYNAMIC_LOADING + /* For really old versions of AIX, this may have to be removed. */ +# endif + +# ifdef HP_PA + /* OS is assumed to be HP/UX */ +# define MACH_TYPE "HP_PA" +# define OS_TYPE "HPUX" +# ifdef __LP64__ +# define CPP_WORDSZ 64 +# define ALIGNMENT 8 +# else +# define CPP_WORDSZ 32 +# define ALIGNMENT 4 +# define ALIGN_DOUBLE +# endif + extern int __data_start; +# define DATASTART ((ptr_t)(&__data_start)) +# if 0 + /* The following appears to work for 7xx systems running HP/UX */ + /* 9.xx Furthermore, it might result in much faster */ + /* collections than HEURISTIC2, which may involve scanning */ + /* segments that directly precede the stack. It is not the */ + /* default, since it may not work on older machine/OS */ + /* combinations. (Thanks to Raymond X.T. Nijssen for uncovering */ + /* this.) */ +# define STACKBOTTOM ((ptr_t) 0x7b033000) /* from /etc/conf/h/param.h */ +# else +# define HEURISTIC2 +# endif +# define STACK_GROWS_UP +# define DYNAMIC_LOADING +# ifndef HPUX_THREADS +# define MPROTECT_VDB +# endif +# include <unistd.h> +# define GETPAGESIZE() sysconf(_SC_PAGE_SIZE) +# endif + +# ifdef ALPHA +# define MACH_TYPE "ALPHA" +# define ALIGNMENT 8 +# define USE_GENERIC_PUSH_REGS + /* Gcc and probably the DEC/Compaq compiler spill pointers to preserved */ + /* fp registers in some cases when the target is a 21264. The assembly */ + /* code doesn't handle that yet, and version dependencies make that a */ + /* bit tricky. Do the easy thing for now. */ +# ifdef OSF1 +# define OS_TYPE "OSF1" +# define DATASTART ((ptr_t) 0x140000000) + extern _end; +# define DATAEND ((ptr_t) &_end) +# define HEURISTIC2 + /* Normally HEURISTIC2 is too conervative, since */ + /* the text segment immediately follows the stack. */ + /* Hence we give an upper pound. */ + extern int __start; +# define HEURISTIC2_LIMIT ((ptr_t)((word)(&__start) & ~(getpagesize()-1))) +# define CPP_WORDSZ 64 +# define MPROTECT_VDB +# define DYNAMIC_LOADING +# endif +# ifdef LINUX +# define OS_TYPE "LINUX" +# define CPP_WORDSZ 64 +# define STACKBOTTOM ((ptr_t) 0x120000000) +# ifdef __ELF__ +# define LINUX_DATA_START +# define DYNAMIC_LOADING + /* This doesn't work if the collector is in a dynamic library. */ +# else +# define DATASTART ((ptr_t) 0x140000000) +# endif + extern int _end; +# define DATAEND (&_end) +# define MPROTECT_VDB + /* Has only been superficially tested. May not */ + /* work on all versions. */ +# endif +# endif + +# ifdef IA64 +# define MACH_TYPE "IA64" +# define ALIGN_DOUBLE + /* Requires 16 byte alignment for malloc */ +# define ALIGNMENT 8 +# define USE_GENERIC_PUSH_REGS + /* We need to get preserved registers in addition to register windows. */ + /* That's easiest to do with setjmp. */ +# ifdef HPUX + --> needs work +# endif +# ifdef LINUX +# define OS_TYPE "LINUX" +# define CPP_WORDSZ 64 + /* This should really be done through /proc, but that */ + /* requires we run on an IA64 kernel. */ +# define STACKBOTTOM ((ptr_t) 0xa000000000000000l) + /* We also need the base address of the register stack */ + /* backing store. There is probably a better way to */ + /* get that, too ... */ +# define BACKING_STORE_BASE ((ptr_t) 0x9fffffff80000000l) +# if 1 +# define SEARCH_FOR_DATA_START +# define DATASTART GC_data_start +# else + extern int data_start; +# define DATASTART ((ptr_t)(&data_start)) +# endif +# define DYNAMIC_LOADING +# define MPROTECT_VDB + /* Requires Linux 2.3.47 or later. */ + extern int _end; +# define DATAEND (&_end) + /* PREFETCH appears to have a large performance impact. */ +# define PREFETCH(x) \ + __asm__ (" lfetch [%0]": : "r"((void *)(x))) +# define PREFETCH_FOR_WRITE(x) \ + __asm__ (" lfetch.excl [%0]": : "r"((void *)(x))) +# define CLEAR_DOUBLE(x) \ + __asm__ (" stf.spill [%0]=f0": : "r"((void *)(x))) +# endif +# endif + +# ifdef M88K +# define MACH_TYPE "M88K" +# define ALIGNMENT 4 +# define ALIGN_DOUBLE + extern int etext; +# ifdef CX_UX +# define OS_TYPE "CX_UX" +# define DATASTART ((((word)&etext + 0x3fffff) & ~0x3fffff) + 0x10000) +# endif +# ifdef DGUX +# define OS_TYPE "DGUX" + extern char * GC_SysVGetDataStart(); +# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &etext) +# endif +# define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */ +# endif + +# ifdef S370 +# define MACH_TYPE "S370" +# define OS_TYPE "UTS4" +# define ALIGNMENT 4 /* Required by hardware */ + extern int etext; + extern int _etext; + extern int _end; + extern char * GC_SysVGetDataStart(); +# define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext) +# define DATAEND (&_end) +# define HEURISTIC2 +# endif + +# if defined(PJ) +# define ALIGNMENT 4 + extern int _etext; +# define DATASTART ((ptr_t)(&_etext)) +# define HEURISTIC1 +# endif + +# ifdef ARM32 +# define CPP_WORDSZ 32 +# define MACH_TYPE "ARM32" +# define ALIGNMENT 4 +# ifdef NETBSD +# define OS_TYPE "NETBSD" +# define HEURISTIC2 + extern char etext; +# define DATASTART ((ptr_t)(&etext)) +# define USE_GENERIC_PUSH_REGS +# endif +# ifdef LINUX +# define OS_TYPE "LINUX" +# define HEURISTIC1 +# undef STACK_GRAN +# define STACK_GRAN 0x10000000 +# define USE_GENERIC_PUSH_REGS +# ifdef __ELF__ +# define DYNAMIC_LOADING +# include <features.h> +# if defined(__GLIBC__) && __GLIBC__ >= 2 +# define LINUX_DATA_START +# else + extern char **__environ; +# define DATASTART ((ptr_t)(&__environ)) + /* hideous kludge: __environ is the first */ + /* word in crt0.o, and delimits the start */ + /* of the data segment, no matter which */ + /* ld options were passed through. */ + /* We could use _etext instead, but that */ + /* would include .rodata, which may */ + /* contain large read-only data tables */ + /* that we'd rather not scan. */ +# endif + extern int _end; +# define DATAEND (&_end) +# else + extern int etext; +# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff)) +# endif +# endif +#endif + +#ifdef LINUX_DATA_START + /* Some Linux distributions arrange to define __data_start. Some */ + /* define data_start as a weak symbol. The latter is technically */ + /* broken, since the user program may define data_start, in which */ + /* case we lose. Nonetheless, we try both, prefering __data_start. */ + /* We assume gcc. */ +# pragma weak __data_start + extern int __data_start; +# pragma weak data_start + extern int data_start; +# define DATASTART ((ptr_t)(&__data_start != 0? &__data_start : &data_start)) +#endif + +# ifndef STACK_GROWS_UP +# define STACK_GROWS_DOWN +# endif + +# ifndef CPP_WORDSZ +# define CPP_WORDSZ 32 +# endif + +# ifndef OS_TYPE +# define OS_TYPE "" +# endif + +# ifndef DATAEND + extern int end; +# define DATAEND (&end) +# endif + +# if defined(SVR4) && !defined(GETPAGESIZE) +# include <unistd.h> +# define GETPAGESIZE() sysconf(_SC_PAGESIZE) +# endif + +# ifndef GETPAGESIZE +# if defined(SUNOS5) || defined(IRIX5) +# include <unistd.h> +# endif +# define GETPAGESIZE() getpagesize() +# endif + +# if defined(SUNOS5) || defined(DRSNX) || defined(UTS4) + /* OS has SVR4 generic features. Probably others also qualify. */ +# define SVR4 +# endif + +# if defined(SUNOS5) || defined(DRSNX) + /* OS has SUNOS5 style semi-undocumented interface to dynamic */ + /* loader. */ +# define SUNOS5DL + /* OS has SUNOS5 style signal handlers. */ +# define SUNOS5SIGS +# endif + +# if defined(HPUX) +# define SUNOS5SIGS +# endif + +# if CPP_WORDSZ != 32 && CPP_WORDSZ != 64 + -> bad word size +# endif + +# ifdef PCR +# undef DYNAMIC_LOADING +# undef STACKBOTTOM +# undef HEURISTIC1 +# undef HEURISTIC2 +# undef PROC_VDB +# undef MPROTECT_VDB +# define PCR_VDB +# endif + +# ifdef SRC_M3 +/* Postponed for now. */ +# undef PROC_VDB +# undef MPROTECT_VDB +# endif + +# ifdef SMALL_CONFIG +/* Presumably not worth the space it takes. */ +# undef PROC_VDB +# undef MPROTECT_VDB +# endif + +# ifdef USE_MUNMAP +# undef MPROTECT_VDB /* Can't deal with address space holes. */ +# endif + +# if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB) +# define DEFAULT_VDB +# endif + +# ifndef PREFETCH +# define PREFETCH(x) +# define NO_PREFETCH +# endif + +# ifndef PREFETCH_FOR_WRITE +# define PREFETCH_FOR_WRITE(x) +# define NO_PREFETCH_FOR_WRITE +# endif + +# ifndef CACHE_LINE_SIZE +# define CACHE_LINE_SIZE 32 /* Wild guess */ +# endif + +# ifndef CLEAR_DOUBLE +# define CLEAR_DOUBLE(x) \ + ((word*)x)[0] = 0; \ + ((word*)x)[1] = 0; +# endif /* CLEAR_DOUBLE */ + +# if defined(_SOLARIS_PTHREADS) && !defined(SOLARIS_THREADS) +# define SOLARIS_THREADS +# endif +# if defined(IRIX_THREADS) && !defined(IRIX5) +--> inconsistent configuration +# endif +# if defined(IRIX_JDK_THREADS) && !defined(IRIX5) +--> inconsistent configuration +# endif +# if defined(LINUX_THREADS) && !defined(LINUX) +--> inconsistent configuration +# endif +# if defined(SOLARIS_THREADS) && !defined(SUNOS5) +--> inconsistent configuration +# endif +# if defined(HPUX_THREADS) && !defined(HPUX) +--> inconsistent configuration +# endif +# if defined(PCR) || defined(SRC_M3) || \ + defined(SOLARIS_THREADS) || defined(WIN32_THREADS) || \ + defined(IRIX_THREADS) || defined(LINUX_THREADS) || \ + defined(IRIX_JDK_THREADS) || defined(HPUX_THREADS) +# define THREADS +# endif + +# if defined(HP_PA) || defined(M88K) || defined(POWERPC) \ + || (defined(I386) && defined(OS2)) || defined(UTS4) || defined(LINT) + /* Use setjmp based hack to mark from callee-save registers. */ +# define USE_GENERIC_PUSH_REGS +# endif +# if defined(SPARC) && !defined(LINUX) +# define SAVE_CALL_CHAIN +# define ASM_CLEAR_CODE /* Stack clearing is crucial, and we */ + /* include assembly code to do it well. */ +# endif + +# endif /* GCCONFIG_H */ |