diff options
Diffstat (limited to 'gcc-4.9/boehm-gc/include/private/gcconfig.h')
| -rw-r--r-- | gcc-4.9/boehm-gc/include/private/gcconfig.h | 2472 |
1 files changed, 2472 insertions, 0 deletions
diff --git a/gcc-4.9/boehm-gc/include/private/gcconfig.h b/gcc-4.9/boehm-gc/include/private/gcconfig.h new file mode 100644 index 000000000..7e081d993 --- /dev/null +++ b/gcc-4.9/boehm-gc/include/private/gcconfig.h @@ -0,0 +1,2472 @@ +/* + * 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) 2000-2004 Hewlett-Packard Development Company, L.P. + * + * 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. + */ + +/* + * This header is private to the gc. It is almost always included from + * gc_priv.h. However it is possible to include it by itself if just the + * configuration macros are needed. In that + * case, a few declarations relying on types declared in gc_priv.h will be + * omitted. + */ + +#ifndef GCCONFIG_H + +# define GCCONFIG_H + +# ifndef GC_PRIVATE_H + /* Fake ptr_t declaration, just to avoid compilation errors. */ + /* This avoids many instances if "ifndef GC_PRIVATE_H" below. */ + typedef struct GC_undefined_struct * ptr_t; +# endif + +/* 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__) +# ifndef LINUX +# define LINUX +# endif +# 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__) || defined(__FreeBSD_kernel__) ) && !defined(FREEBSD) +# define FREEBSD +# endif + +/* Determine the machine type: */ +#if defined(__aarch64__) +# define AARCH64 +# if !defined(LINUX) +# define NOSYS +# define mach_type_known +# endif +# endif +# if defined(__arm__) || defined(__thumb__) +# define ARM32 +# if !defined(LINUX) && !defined(NETBSD) +# 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) || 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__) || defined(__arm__)) +# define ARM32 +# define mach_type_known +# endif +# if defined(NETBSD) && defined(__sh__) +# define SH +# 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(__NetBSD__) && defined(__vax__) +# define VAX +# 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) && !defined(NETBSD) +# if defined(ultrix) || defined(__ultrix) +# 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(sun) && defined(__amd64) +# define X86_64 +# 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__) && !defined(__NetBSD__) && !defined(__FreeBSD__) +# 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 +# if !defined(LINUX) && !defined(HPUX) +# define HPUX +# endif +# define mach_type_known +# endif +# if defined(__ia64) && defined(_HPUX_SOURCE) +# define IA64 +# ifndef HPUX +# define HPUX +# endif +# 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(__x86_64__) +# define X86_64 +# define mach_type_known +# endif +# if defined(LINUX) && (defined(__ia64__) || defined(__ia64)) +# define IA64 +# define mach_type_known +# endif +# if defined(LINUX) && defined(__aarch64__) +# define AARCH64 +# define mach_type_known +# endif +# if defined(LINUX) && defined(__arm__) +# define ARM32 +# define mach_type_known +# endif +# if defined(LINUX) && defined(__cris__) +# ifndef CRIS +# define CRIS +# endif +# define mach_type_known +# endif +# if defined(LINUX) && (defined(powerpc) || defined(__powerpc__) || \ + defined(powerpc64) || defined(__powerpc64__)) +# define POWERPC +# define mach_type_known +# endif +# if defined(FREEBSD) && (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(LINUX) && defined(__m32r__) +# define M32R +# 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__)) +# define DARWIN +# if defined(__ppc__) || defined(__ppc64__) +# define POWERPC +# define mach_type_known +# elif defined(__x86_64__) +# define X86_64 +# define mach_type_known +# elif defined(__i386__) +# define I386 +# define mach_type_known +# endif +# 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(FREEBSD) && defined(__x86_64__) +# define X86_64 +# define mach_type_known +# endif +# if defined(__NetBSD__) && (defined(i386) || defined(__i386__)) +# define I386 +# define mach_type_known +# endif +# if defined(__NetBSD__) && defined(__x86_64__) +# define X86_64 +# define mach_type_known +# endif +# if defined(FREEBSD) && defined(__sparc__) +# define SPARC +# 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 +# if defined(_MSC_VER) && defined(_M_IA64) +# define IA64 +# define MSWIN32 /* Really win64, but we don't treat 64-bit */ + /* variants as a differnt platform. */ +# 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 S390 +# 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 */ + /* S390 ==> 390-like machine */ + /* running LINUX */ + /* AARCH64 ==> ARM AArch64 */ + /* ARM32 ==> Intel StrongARM */ + /* IA64 ==> Intel IPF */ + /* (e.g. Itanium) */ + /* (LINUX and HPUX) */ + /* SH ==> Hitachi SuperH */ + /* (LINUX & MSWINCE) */ + /* X86_64 ==> AMD x86-64 */ + /* POWERPC ==> IBM/Apple PowerPC */ + /* (MACOS(<=9),DARWIN(incl.MACOSX),*/ + /* LINUX, NETBSD, NOSYS variants) */ + /* Handles 32 and 64-bit variants. */ + /* AIX should be handled here, but */ + /* that's called an RS6000. */ + /* CRIS ==> Axis Etrax */ + /* M32R ==> Renesas M32R */ + + +/* + * For each architecture and OS, the following need to be defined: + * + * CPP_WORDSZ 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_WORDSZ 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_WORDSZ 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;'' . + * Otherwise, ``GCC will assume these are in .sdata/.sbss'' and it will, e.g., + * cause failures on alpha*-*-* with ``-msmall-data or -fpic'' or mips-*-* + * without any special options. + * + * 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)) \ + && !defined(__INTEL_COMPILER) \ + && !defined(__PATHCC__) +# 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 +# ifdef __ELF__ +# define DATASTART GC_data_start +# define DYNAMIC_LOADING +# else + extern char etext[]; +# define DATASTART ((ptr_t)(etext)) +# endif +# define USE_GENERIC_PUSH_REGS +# 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 +# define USE_GENERIC_PUSH_REGS +# endif +# ifdef LINUX +# define OS_TYPE "LINUX" +# define LINUX_STACKBOTTOM +# define USE_GENERIC_PUSH_REGS + /* We never got around to the assembly version. */ +# define MPROTECT_VDB +# ifdef __ELF__ +# define DYNAMIC_LOADING +# include <features.h> +# if defined(__GLIBC__)&& __GLIBC__>=2 +# define SEARCH_FOR_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 + +# if defined(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 +# if defined(__powerpc64__) +# define ALIGNMENT 8 +# define CPP_WORDSZ 64 +# ifndef HBLKSIZE +# define HBLKSIZE 4096 +# endif +# else +# define ALIGNMENT 4 +# endif +# define OS_TYPE "LINUX" + /* HEURISTIC1 has been reliably reported to fail for a 32-bit */ + /* executable on a 64 bit kernel. */ +# define LINUX_STACKBOTTOM +# define DYNAMIC_LOADING +# define SEARCH_FOR_DATA_START + extern int _end[]; +# define DATAEND (_end) +# endif +# ifdef DARWIN +# define OS_TYPE "DARWIN" +# define DYNAMIC_LOADING +# if defined(__ppc64__) +# define ALIGNMENT 8 +# define CPP_WORDSZ 64 +# define STACKBOTTOM ((ptr_t) 0x7fff5fc00000) +# define CACHE_LINE_SIZE 64 +# ifndef HBLKSIZE +# define HBLKSIZE 4096 +# endif +# else +# define ALIGNMENT 4 +# define STACKBOTTOM ((ptr_t) 0xc0000000) +# endif + /* XXX: see get_end(3), get_etext() and get_end() should not be used. + These aren't used when dyld support is enabled (it is by default) */ +# define DATASTART ((ptr_t) get_etext()) +# define DATAEND ((ptr_t) get_end()) +# define USE_MMAP +# define USE_MMAP_ANON +# define USE_ASM_PUSH_REGS +# ifdef GC_DARWIN_THREADS +# define MPROTECT_VDB +# endif +# include <unistd.h> +# define GETPAGESIZE() getpagesize() +# if defined(USE_PPC_PREFETCH) && defined(__GNUC__) + /* The performance impact of prefetches is untested */ +# define PREFETCH(x) \ + __asm__ __volatile__ ("dcbt 0,%0" : : "r" ((const void *) (x))) +# define PREFETCH_FOR_WRITE(x) \ + __asm__ __volatile__ ("dcbtst 0,%0" : : "r" ((const void *) (x))) +# endif + /* There seems to be some issues with trylock hanging on darwin. This + should be looked into some more */ +# define NO_PTHREAD_TRYLOCK +# endif +# ifdef FREEBSD +# if defined(__powerpc64__) +# define ALIGNMENT 8 +# define CPP_WORDSZ 64 +# ifndef HBLKSIZE +# define HBLKSIZE 4096 +# endif +# else +# define ALIGNMENT 4 +# endif +# 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[]; + extern char * GC_FreeBSDGetDataStart(); +# define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext) +# 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 ptr_t GC_SysVGetDataStart(); +# define DATASTART 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 +# define SOLARIS_STACKBOTTOM +# 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 ptr_t GC_SysVGetDataStart(); + extern int etext[]; +# define DATASTART 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 + extern ptr_t GC_SysVGetDataStart(); +# ifdef __arch64__ +# define DATASTART GC_SysVGetDataStart(0x100000, _etext) +# else +# define DATASTART GC_SysVGetDataStart(0x10000, _etext) +# endif +# define LINUX_STACKBOTTOM +# 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 +# ifdef FREEBSD +# define OS_TYPE "FREEBSD" +# define SIG_SUSPEND SIGUSR1 +# define SIG_THR_RESTART SIGUSR2 +# define FREEBSD_STACKBOTTOM +# ifdef __ELF__ +# define DYNAMIC_LOADING +# endif + 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)) +# endif +# endif + +# ifdef I386 +# define MACH_TYPE "I386" +# if defined(__LP64__) || defined(_WIN64) +# define CPP_WORDSZ 64 +# define ALIGNMENT 8 +# else +# define CPP_WORDSZ 32 +# 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. */ +# endif +# 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 ptr_t GC_SysVGetDataStart(); +# define DATASTART GC_SysVGetDataStart(0x1000, _etext) +# define DATAEND (_end) +# define SOLARIS_STACKBOTTOM +/* 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 ptr_t 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 (ptr_t)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 SEARCH_FOR_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 + /* FIXME: Thus should use __builtin_prefetch, but we'll leave that */ + /* for the next rtelease. */ +# 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" +# define DATASTART ((ptr_t)GC_DATASTART) /* From gc.h */ +# define DATAEND ((ptr_t)GC_DATAEND) +# 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 +# ifdef __GLIBC__ +# define SIG_SUSPEND (32+6) +# define SIG_THR_RESTART (32+5) + extern int _end[]; +# define DATAEND (_end) +# else +# define SIG_SUSPEND SIGUSR1 +# define SIG_THR_RESTART SIGUSR2 +# endif +# define FREEBSD_STACKBOTTOM +# ifdef __ELF__ +# define DYNAMIC_LOADING +# endif + extern char etext[]; + extern char * GC_FreeBSDGetDataStart(); +# define DATASTART GC_FreeBSDGetDataStart(0x1000, &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 +# define SIG_SUSPEND SIGUSR1 +# define SIG_THR_RESTART SIGUSR2 +# define SEARCH_FOR_DATA_START + extern int _end[]; +# define DATAEND ( (ptr_t) (_end)) +/* # define MPROTECT_VDB Not quite working yet? */ +# define DYNAMIC_LOADING +# endif +# ifdef DARWIN +# define OS_TYPE "DARWIN" +# define DARWIN_DONT_PARSE_STACK +# define DYNAMIC_LOADING + /* XXX: see get_end(3), get_etext() and get_end() should not be used. + These aren't used when dyld support is enabled (it is by default) */ +# define DATASTART ((ptr_t) get_etext()) +# define DATAEND ((ptr_t) get_end()) +# ifdef HAVE_PTHREAD_GET_STACKADDR_NP +# define STACKBOTTOM (ptr_t)pthread_get_stackaddr_np(pthread_self()) +# else +# define STACKBOTTOM ((ptr_t) 0xc0000000) +# endif +# define USE_MMAP +# define USE_MMAP_ANON +# define USE_ASM_PUSH_REGS +# ifdef GC_DARWIN_THREADS +# define MPROTECT_VDB +# endif +# include <unistd.h> +# define GETPAGESIZE() getpagesize() + /* There seems to be some issues with trylock hanging on darwin. This + should be looked into some more */ +# define NO_PTHREAD_TRYLOCK +# endif /* DARWIN */ +# 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)) +# ifdef _MIPS_SZPTR +# define CPP_WORDSZ _MIPS_SZPTR +# define ALIGNMENT (_MIPS_SZPTR/8) +# else +# define ALIGNMENT 4 +# endif +# ifndef HBLKSIZE +# define HBLKSIZE 4096 +# endif +# 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 DOB: this should work, but there is evidence */ +/* of recent breakage. */ +# ifdef _MIPS_SZPTR +# define CPP_WORDSZ _MIPS_SZPTR +# define ALIGNMENT (_MIPS_SZPTR/8) +# if CPP_WORDSZ != 64 +# define ALIGN_DOUBLE +# endif +# if _MIPS_SZPTR == 64 +# define ELF_CLASS ELFCLASS64 +# 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) +# 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 ALIGNMENT +# undef ALIGNMENT +# endif +# ifdef IA64 +# undef IA64 /* DOB: some AIX installs stupidly define IA64 in /usr/include/sys/systemcfg.h */ +# endif +# ifdef __64BIT__ +# define ALIGNMENT 8 +# define CPP_WORDSZ 64 +# define STACKBOTTOM ((ptr_t)0x1000000000000000) +# else +# define ALIGNMENT 4 +# define CPP_WORDSZ 32 +# define STACKBOTTOM ((ptr_t)((ulong)&errno)) +# endif +# define USE_MMAP +# define USE_MMAP_ANON + /* From AIX linker man page: + _text Specifies the first location of the program. + _etext Specifies the first location after the program. + _data Specifies the first location of the data. + _edata Specifies the first location after the initialized data + _end or end Specifies the first location after all data. + */ + 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 +# define CPP_WORDSZ 64 +# 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 DYNAMIC_LOADING +# endif +# ifdef OPENBSD +# define OS_TYPE "OPENBSD" +# define HEURISTIC2 +# 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)) +# 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))) +# ifndef GC_OSF1_THREADS + /* Unresolved signal issues with threads. */ +# define MPROTECT_VDB +# endif +# define DYNAMIC_LOADING +# endif +# ifdef LINUX +# define OS_TYPE "LINUX" +# define LINUX_STACKBOTTOM +# 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 HPUX_STACKBOTTOM +# 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 + extern ptr_t GC_register_stackbottom; +# define BACKING_STORE_BASE GC_register_stackbottom + /* Known to be wrong for recent HP/UX versions!!! */ +# 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 ptr_t GC_register_stackbottom; +# define BACKING_STORE_BASE 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__ +# ifndef __INTEL_COMPILER +# define PREFETCH(x) \ + __asm__ (" lfetch [%0]": : "r"(x)) +# define PREFETCH_FOR_WRITE(x) \ + __asm__ (" lfetch.excl [%0]": : "r"(x)) +# define CLEAR_DOUBLE(x) \ + __asm__ (" stf.spill [%0]=f0": : "r"((void *)(x))) +# else +# include <ia64intrin.h> +# define PREFETCH(x) \ + __lfetch(__lfhint_none, (x)) +# define PREFETCH_FOR_WRITE(x) \ + __lfetch(__lfhint_nta, (x)) +# define CLEAR_DOUBLE(x) \ + __stf_spill((void *)(x), 0) +# endif // __INTEL_COMPILER +# endif +# endif +# ifdef MSWIN32 + /* FIXME: This is a very partial guess. There is no port, yet. */ +# define OS_TYPE "MSWIN32" + /* STACKBOTTOM and DATASTART are handled specially in */ + /* os_dep.c. */ +# define DATAEND /* not needed */ +# if defined(_WIN64) +# define CPP_WORDSZ 64 +# else +# define CPP_WORDSZ 32 /* Is this possible? */ +# endif +# define ALIGNMENT 8 +# 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 ptr_t GC_SysVGetDataStart(); +# define DATASTART GC_SysVGetDataStart(0x10000, etext) +# endif +# define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */ +# endif + +# ifdef S370 + /* If this still works, and if anyone cares, this should probably */ + /* be moved to the S390 category. */ +# 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 ptr_t GC_SysVGetDataStart(); +# define DATASTART GC_SysVGetDataStart(0x10000, _etext) +# define DATAEND (_end) +# define HEURISTIC2 +# endif +# endif + +# ifdef S390 +# define MACH_TYPE "S390" +# define USE_GENERIC_PUSH_REGS +# ifndef __s390x__ +# define ALIGNMENT 4 +# define CPP_WORDSZ 32 +# else +# define ALIGNMENT 8 +# define CPP_WORDSZ 64 +# endif +# ifndef HBLKSIZE +# define HBLKSIZE 4096 +# endif +# ifdef LINUX +# define OS_TYPE "LINUX" +# define LINUX_STACKBOTTOM +# define DYNAMIC_LOADING + extern int __data_start[]; +# define DATASTART ((ptr_t)(__data_start)) + extern int _end[]; +# define DATAEND (_end) +# define CACHE_LINE_SIZE 256 +# define GETPAGESIZE() 4096 +# endif +# endif + +# if defined(PJ) +# define ALIGNMENT 4 + extern int _etext[]; +# define DATASTART ((ptr_t)(_etext)) +# define HEURISTIC1 +# endif + +# ifdef AARCH64 +# define CPP_WORDSZ 64 +# define MACH_TYPE "AARCH64" +# define ALIGNMENT 8 +# ifndef HBLKSIZE +# define HBLKSIZE 4096 +# endif +# ifdef LINUX +# define OS_TYPE "LINUX" +# define LINUX_STACKBOTTOM +# define USE_GENERIC_PUSH_REGS +# define DYNAMIC_LOADING + extern int __data_start[]; +# define DATASTART ((ptr_t)__data_start) + extern char _end[]; +# define DATAEND ((ptr_t)(&_end)) +# endif +# ifdef NOSYS + /* __data_start is usually defined in the target linker script. */ + extern int __data_start[]; +# define DATASTART ((ptr_t)__data_start) + extern void *__stack_base__; +# define STACKBOTTOM ((ptr_t)__stack_base__) +# endif +# endif + +# ifdef ARM32 +# define CPP_WORDSZ 32 +# define MACH_TYPE "ARM32" +# define ALIGNMENT 4 +# 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 +# define USE_GENERIC_PUSH_REGS +# endif +# ifdef LINUX +# define OS_TYPE "LINUX" +# define LINUX_STACKBOTTOM +# 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 SEARCH_FOR_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 CRIS +# define MACH_TYPE "CRIS" +# define CPP_WORDSZ 32 +# define ALIGNMENT 1 +# define OS_TYPE "LINUX" +# define DYNAMIC_LOADING +# define LINUX_STACKBOTTOM +# define USE_GENERIC_PUSH_REGS +# define SEARCH_FOR_DATA_START + extern int _end[]; +# define DATAEND (_end) +# 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 LINUX_STACKBOTTOM +# define USE_GENERIC_PUSH_REGS +# define DYNAMIC_LOADING +# define SEARCH_FOR_DATA_START + extern int _end[]; +# define DATAEND (_end) +# endif +# ifdef NETBSD +# define OS_TYPE "NETBSD" +# define HEURISTIC2 +# define DATASTART GC_data_start +# define USE_GENERIC_PUSH_REGS +# define DYNAMIC_LOADING +# endif +# endif + +# ifdef SH4 +# define MACH_TYPE "SH4" +# define OS_TYPE "MSWINCE" +# define ALIGNMENT 4 +# define DATAEND /* not needed */ +# endif + +# ifdef M32R +# define CPP_WORDSZ 32 +# define MACH_TYPE "M32R" +# define ALIGNMENT 4 +# ifdef LINUX +# define OS_TYPE "LINUX" +# define LINUX_STACKBOTTOM +# undef STACK_GRAN +# define STACK_GRAN 0x10000000 +# define USE_GENERIC_PUSH_REGS +# define DYNAMIC_LOADING +# define SEARCH_FOR_DATA_START + extern int _end[]; +# define DATAEND (_end) +# endif +# endif + +# ifdef X86_64 +# define MACH_TYPE "X86_64" +# ifdef __ILP32__ +# define ALIGNMENT 4 +# define CPP_WORDSZ 32 +# else +# define ALIGNMENT 8 +# define CPP_WORDSZ 64 +# endif +# ifndef HBLKSIZE +# define HBLKSIZE 4096 +# endif +# define CACHE_LINE_SIZE 64 +# define USE_GENERIC_PUSH_REGS +# ifdef LINUX +# define OS_TYPE "LINUX" +# define LINUX_STACKBOTTOM +# 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 +# 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> +# define SEARCH_FOR_DATA_START + extern int _end[]; +# define DATAEND (_end) +# else + extern int etext[]; +# define DATASTART ((ptr_t)((((word) (etext)) + 0xfff) & ~0xfff)) +# endif +# if defined(__GNUC__) && __GNUC >= 3 +# define PREFETCH(x) __builtin_prefetch((x), 0, 0) +# define PREFETCH_FOR_WRITE(x) __builtin_prefetch((x), 1) +# endif +# endif +# ifdef DARWIN +# define OS_TYPE "DARWIN" +# define DARWIN_DONT_PARSE_STACK +# define DYNAMIC_LOADING + /* XXX: see get_end(3), get_etext() and get_end() should not be used. + These aren't used when dyld support is enabled (it is by default) */ +# define DATASTART ((ptr_t) get_etext()) +# define DATAEND ((ptr_t) get_end()) +# ifdef HAVE_PTHREAD_GET_STACKADDR_NP +# define STACKBOTTOM (ptr_t)pthread_get_stackaddr_np(pthread_self()) +# else +# define STACKBOTTOM ((ptr_t) 0x7fff5fc00000) +# endif +# define USE_MMAP +# define USE_MMAP_ANON +# ifdef GC_DARWIN_THREADS +# define MPROTECT_VDB +# endif +# include <unistd.h> +# define GETPAGESIZE() getpagesize() + /* There seems to be some issues with trylock hanging on darwin. This + should be looked into some more */ +# define NO_PTHREAD_TRYLOCK +# endif +# ifdef FREEBSD +# define OS_TYPE "FREEBSD" +# ifndef GC_FREEBSD_THREADS +# define MPROTECT_VDB +# endif +# ifdef __GLIBC__ +# define SIG_SUSPEND (32+6) +# define SIG_THR_RESTART (32+5) + extern int _end[]; +# define DATAEND (_end) +# else +# define SIG_SUSPEND SIGUSR1 +# define SIG_THR_RESTART SIGUSR2 +# endif +# define FREEBSD_STACKBOTTOM +# ifdef __ELF__ +# define DYNAMIC_LOADING +# endif + extern char etext[]; + extern char * GC_FreeBSDGetDataStart(); +# define DATASTART GC_FreeBSDGetDataStart(0x1000, &etext) +# endif +# ifdef NETBSD +# define OS_TYPE "NETBSD" +# ifdef __ELF__ +# define DYNAMIC_LOADING +# endif +# define HEURISTIC2 + extern char etext[]; +# define SEARCH_FOR_DATA_START +# endif +# ifdef SUNOS5 +# define ELF_CLASS ELFCLASS64 +# define OS_TYPE "SUNOS5" + extern int _etext[], _end[]; + extern ptr_t 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 */ +# define HEURISTIC2 +# define PROC_VDB +# 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 +# endif + +#if defined(LINUX) && defined(USE_MMAP) + /* The kernel may do a somewhat better job merging mappings etc. */ + /* with anonymous mappings. */ +# define USE_MMAP_ANON +#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(FREEBSD) && ((__FreeBSD__ >= 4) || (__FreeBSD_kernel__ >= 4)) +# define SUNOS5SIGS +# endif + +# if defined(SVR4) || defined(LINUX) || defined(IRIX5) || defined(HPUX) \ + || defined(OPENBSD) || defined(NETBSD) || defined(FREEBSD) \ + || defined(DGUX) || defined(BSD) || defined(SUNOS4) \ + || defined(_AIX) || defined(DARWIN) || defined(OSF1) \ + || defined(HURD) +# 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(LINUX) || defined(HURD) || defined(__GLIBC__) +# define REGISTER_LIBRARIES_EARLY + /* We sometimes use dl_iterate_phdr, which may acquire an internal */ + /* lock. This isn't safe after the world has stopped. So we must */ + /* call GC_register_dynamic_libraries before stopping the world. */ + /* For performance reasons, this may be beneficial on other */ + /* platforms as well, though it should be avoided in win32. */ +# endif /* LINUX */ + +# 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 */ + +# 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_AIX_THREADS) && !defined(_AIX) + --> inconsistent configuration +# endif +# if defined(GC_GNU_THREADS) && !defined(HURD) + --> inconsistent configuration +# endif +# if defined(GC_WIN32_THREADS) && !defined(MSWIN32) && !defined(CYGWIN32) + --> 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(DARWIN) \ + || defined(LINT) || defined(MSWINCE) || defined(ARM32) || defined(CRIS) \ + || (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(MSWINCE) +# define NO_GETENV +# 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. */ + /* GC_CAN_SAVE_CALL_STACKS is set in gc.h. */ + +#if defined(SPARC) +# define CAN_SAVE_CALL_ARGS +#endif +#if (defined(I386) || defined(X86_64)) && (defined(LINUX) || defined(__GLIBC__)) + /* 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_ARGS +#endif + +# if defined(SAVE_CALL_COUNT) && !defined(GC_ADD_CALLER) \ + && defined(GC_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 + +# if defined(POINTER_MASK) && !defined(POINTER_SHIFT) +# define POINTER_SHIFT 0 +# endif + +# if defined(POINTER_SHIFT) && !defined(POINTER_MASK) +# define POINTER_MASK ((GC_word)(-1)) +# endif + +# if !defined(FIXUP_POINTER) && defined(POINTER_MASK) +# define FIXUP_POINTER(p) (p) = ((p) & (POINTER_MASK) << POINTER_SHIFT) +# endif + +# if defined(FIXUP_POINTER) +# define NEED_FIXUP_POINTER 1 +# else +# define NEED_FIXUP_POINTER 0 +# define FIXUP_POINTER(p) +# 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(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 +# if defined(MSWIN32) || defined(CYGWIN32) + 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 */ + +#if defined(_AIX) && !defined(__GNUC__) && !defined(__STDC__) + /* IBMs xlc compiler doesn't appear to follow the convention of */ + /* defining __STDC__ to be zero in extended mode. */ +# define __STDC__ 0 +#endif + +# endif /* GCCONFIG_H */ |