| /* |
| * Copyright 1988, 1989 Hans-J. Boehm, Alan J. Demers |
| * Copyright (c) 1991-1994 by Xerox Corporation. All rights reserved. |
| * Copyright (c) 1996 by Silicon Graphics. All rights reserved. |
| * Copyright (c) 2000 by Hewlett-Packard Company. All rights reserved. |
| * |
| * THIS MATERIAL IS PROVIDED AS IS, WITH ABSOLUTELY NO WARRANTY EXPRESSED |
| * OR IMPLIED. ANY USE IS AT YOUR OWN RISK. |
| * |
| * Permission is hereby granted to use or copy this program |
| * for any purpose, provided the above notices are retained on all copies. |
| * Permission to modify the code and to distribute modified code is granted, |
| * provided the above notices are retained, and a notice that the code was |
| * modified is included with the above copyright notice. |
| */ |
| |
| #ifndef GCCONFIG_H |
| |
| # define GCCONFIG_H |
| |
| /* Machine dependent parameters. Some tuning parameters can be found */ |
| /* near the top of gc_private.h. */ |
| |
| /* Machine specific parts contributed by various people. See README file. */ |
| |
| /* First a unified test for Linux: */ |
| # if defined(linux) || defined(__linux__) |
| # define LINUX |
| # endif |
| |
| /* And one for NetBSD: */ |
| # if defined(__NetBSD__) |
| # define NETBSD |
| # endif |
| |
| /* And one for OpenBSD: */ |
| # if defined(__OpenBSD__) |
| # define OPENBSD |
| # endif |
| |
| /* 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 mach_type_known |
| # endif |
| # if defined(OPENBSD) && defined(__sparc__) |
| # define SPARC |
| # define mach_type_known |
| # endif |
| # if defined(NETBSD) && defined(m68k) |
| # define M68K |
| # define mach_type_known |
| # endif |
| # if defined(NETBSD) && defined(__powerpc__) |
| # define POWERPC |
| # define mach_type_known |
| # endif |
| # if defined(NETBSD) && defined(__arm32__) |
| # define ARM32 |
| # define mach_type_known |
| # endif |
| # if defined(vax) |
| # define VAX |
| # ifdef ultrix |
| # define ULTRIX |
| # else |
| # define BSD |
| # endif |
| # define mach_type_known |
| # endif |
| # if defined(mips) || defined(__mips) |
| # 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 */ |
| # if defined(__NetBSD__) && defined(__MIPSEL__) |
| # undef ULTRIX |
| # endif |
| # define mach_type_known |
| # endif |
| # if defined(sequent) && (defined(i386) || defined(__i386__)) |
| # define I386 |
| # define SEQUENT |
| # define mach_type_known |
| # endif |
| # if defined(sun) && (defined(i386) || defined(__i386__)) |
| # define I386 |
| # define SUNOS5 |
| # define mach_type_known |
| # endif |
| # if (defined(__OS2__) || defined(__EMX__)) && defined(__32BIT__) |
| # define I386 |
| # define OS2 |
| # define mach_type_known |
| # endif |
| # if defined(ibm032) |
| # define RT |
| # define mach_type_known |
| # endif |
| # if defined(sun) && (defined(sparc) || defined(__sparc)) |
| # define SPARC |
| /* Test for SunOS 5.x */ |
| # include <errno.h> |
| # ifdef ECHRNG |
| # define SUNOS5 |
| # else |
| # define SUNOS4 |
| # endif |
| # define mach_type_known |
| # endif |
| # if defined(sparc) && defined(unix) && !defined(sun) && !defined(linux) \ |
| && !defined(__OpenBSD__) && !(__NetBSD__) |
| # define SPARC |
| # define DRSNX |
| # define mach_type_known |
| # endif |
| # if defined(_IBMR2) |
| # define RS6000 |
| # define mach_type_known |
| # endif |
| # if defined(__NetBSD__) && defined(__sparc__) |
| # define SPARC |
| # define mach_type_known |
| # endif |
| # if defined(_M_XENIX) && defined(_M_SYSV) && defined(_M_I386) |
| /* The above test may need refinement */ |
| # define I386 |
| # if defined(_SCO_ELF) |
| # define SCO_ELF |
| # else |
| # define SCO |
| # endif |
| # define mach_type_known |
| # endif |
| # if defined(_AUX_SOURCE) |
| # define M68K |
| # define SYSV |
| # define mach_type_known |
| # endif |
| # if defined(_PA_RISC1_0) || defined(_PA_RISC1_1) || defined(_PA_RISC2_0) \ |
| || defined(hppa) || defined(__hppa__) |
| # define HP_PA |
| # ifndef LINUX |
| # define HPUX |
| # endif |
| # define mach_type_known |
| # endif |
| # if defined(__ia64) && defined(_HPUX_SOURCE) |
| # define IA64 |
| # define HPUX |
| # define mach_type_known |
| # endif |
| # if defined(__BEOS__) && defined(_X86_) |
| # define I386 |
| # define BEOS |
| # define mach_type_known |
| # endif |
| # if defined(LINUX) && (defined(i386) || defined(__i386__)) |
| # define I386 |
| # define mach_type_known |
| # endif |
| # if defined(LINUX) && (defined(__ia64__) || defined(__ia64)) |
| # define IA64 |
| # define mach_type_known |
| # endif |
| # if defined(LINUX) && (defined(powerpc) || defined(__powerpc__)) |
| # define POWERPC |
| # define mach_type_known |
| # endif |
| # if defined(LINUX) && defined(__mc68000__) |
| # define M68K |
| # define mach_type_known |
| # endif |
| # if defined(LINUX) && (defined(sparc) || defined(__sparc__)) |
| # define SPARC |
| # define mach_type_known |
| # endif |
| # if defined(LINUX) && defined(__arm__) |
| # define ARM32 |
| # define mach_type_known |
| # endif |
| # if defined(LINUX) && defined(__sh__) |
| # define SH |
| # define mach_type_known |
| # endif |
| # if defined(__alpha) || defined(__alpha__) |
| # define ALPHA |
| # if !defined(LINUX) && !defined(NETBSD) && !defined(OPENBSD) |
| # 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) || \ |
| defined(__APPLE__) && defined(__MACH__) && defined(__ppc__) |
| # define MACOSX |
| # define POWERPC |
| # define mach_type_known |
| # endif |
| # if defined(__APPLE__) && defined(__MACH__) && defined(__i386__) |
| # define MACOSX |
| # define I386 |
| --> Not really supported, but at least we recognize it. |
| # endif |
| # if defined(NeXT) && defined(mc68000) |
| # define M68K |
| # define NEXT |
| # define mach_type_known |
| # endif |
| # if defined(NeXT) && (defined(i386) || defined(__i386__)) |
| # define I386 |
| # define NEXT |
| # define mach_type_known |
| # endif |
| # if defined(__OpenBSD__) && (defined(i386) || defined(__i386__)) |
| # define I386 |
| # define OPENBSD |
| # define mach_type_known |
| # endif |
| # if defined(__FreeBSD__) && (defined(i386) || defined(__i386__)) |
| # define I386 |
| # define FREEBSD |
| # define mach_type_known |
| # endif |
| # if defined(__NetBSD__) && (defined(i386) || defined(__i386__)) |
| # define I386 |
| # define mach_type_known |
| # endif |
| # if defined(bsdi) && (defined(i386) || defined(__i386__)) |
| # define I386 |
| # define BSDI |
| # define mach_type_known |
| # endif |
| # if !defined(mach_type_known) && defined(__386BSD__) |
| # define I386 |
| # define THREE86BSD |
| # define mach_type_known |
| # endif |
| # if defined(_CX_UX) && defined(_M88K) |
| # define M88K |
| # define CX_UX |
| # define mach_type_known |
| # endif |
| # if defined(DGUX) |
| # define M88K |
| /* DGUX defined */ |
| # define mach_type_known |
| # endif |
| # if defined(_WIN32_WCE) |
| /* SH3, SH4, MIPS already defined for corresponding architectures */ |
| # if defined(SH3) || defined(SH4) |
| # define SH |
| # endif |
| # if defined(x86) |
| # define I386 |
| # endif |
| # if defined(ARM) |
| # define ARM32 |
| # endif |
| # define MSWINCE |
| # define mach_type_known |
| # else |
| # if (defined(_MSDOS) || defined(_MSC_VER)) && (_M_IX86 >= 300) \ |
| || defined(_WIN32) && !defined(__CYGWIN32__) && !defined(__CYGWIN__) |
| # define I386 |
| # define MSWIN32 /* or Win32s */ |
| # define mach_type_known |
| # endif |
| # endif |
| # if defined(__DJGPP__) |
| # define I386 |
| # ifndef DJGPP |
| # define DJGPP /* MSDOS running the DJGPP port of GCC */ |
| # endif |
| # define mach_type_known |
| # endif |
| # if defined(__CYGWIN32__) || defined(__CYGWIN__) |
| # define I386 |
| # define CYGWIN32 |
| # define mach_type_known |
| # endif |
| # if defined(__MINGW32__) |
| # define I386 |
| # define MSWIN32 |
| # define mach_type_known |
| # endif |
| # if defined(__BORLANDC__) |
| # define I386 |
| # define MSWIN32 |
| # define mach_type_known |
| # endif |
| # if defined(_UTS) && !defined(mach_type_known) |
| # define S370 |
| # define UTS4 |
| # define mach_type_known |
| # endif |
| # if defined(__pj__) |
| # define PJ |
| # define mach_type_known |
| # endif |
| # if defined(__embedded__) && defined(PPC) |
| # define POWERPC |
| # define NOSYS |
| # define mach_type_known |
| # endif |
| /* Ivan Demakov */ |
| # if defined(__WATCOMC__) && defined(__386__) |
| # define I386 |
| # if !defined(OS2) && !defined(MSWIN32) && !defined(DOS4GW) |
| # if defined(__OS2__) |
| # define OS2 |
| # else |
| # if defined(__WINDOWS_386__) || defined(__NT__) |
| # define MSWIN32 |
| # else |
| # define DOS4GW |
| # endif |
| # endif |
| # endif |
| # define mach_type_known |
| # endif |
| # if defined(__s390__) && defined(LINUX) |
| # define S370 |
| # define mach_type_known |
| # endif |
| # if defined(__GNU__) |
| # if defined(__i386__) |
| /* The Debian Hurd running on generic PC */ |
| # define HURD |
| # define I386 |
| # define mach_type_known |
| # endif |
| # endif |
| |
| /* Feel free to add more clauses here */ |
| |
| /* Or manually define the machine type here. A machine type is */ |
| /* characterized by the architecture. Some */ |
| /* machine types are further subdivided by OS. */ |
| /* the macros ULTRIX, RISCOS, and BSD to distinguish. */ |
| /* Note that SGI IRIX is treated identically to RISCOS. */ |
| /* SYSV on an M68K actually means A/UX. */ |
| /* The distinction in these cases is usually the stack starting address */ |
| # ifndef mach_type_known |
| --> unknown machine type |
| # endif |
| /* Mapping is: M68K ==> Motorola 680X0 */ |
| /* (SUNOS4,HP,NEXT, and SYSV (A/UX), */ |
| /* MACOS and AMIGA variants) */ |
| /* I386 ==> Intel 386 */ |
| /* (SEQUENT, OS2, SCO, LINUX, NETBSD, */ |
| /* FREEBSD, THREE86BSD, MSWIN32, */ |
| /* BSDI,SUNOS5, NEXT, other variants) */ |
| /* NS32K ==> Encore Multimax */ |
| /* MIPS ==> R2000 or R3000 */ |
| /* (RISCOS, ULTRIX variants) */ |
| /* VAX ==> DEC VAX */ |
| /* (BSD, ULTRIX variants) */ |
| /* RS6000 ==> IBM RS/6000 AIX3.X */ |
| /* RT ==> IBM PC/RT */ |
| /* HP_PA ==> HP9000/700 & /800 */ |
| /* HP/UX, LINUX */ |
| /* SPARC ==> SPARC v7/v8/v9 */ |
| /* (SUNOS4, SUNOS5, LINUX, */ |
| /* DRSNX variants) */ |
| /* ALPHA ==> DEC Alpha */ |
| /* (OSF1 and LINUX variants) */ |
| /* M88K ==> Motorola 88XX0 */ |
| /* (CX_UX and DGUX) */ |
| /* S370 ==> 370-like machine */ |
| /* running Amdahl UTS4 */ |
| /* or a 390 running LINUX */ |
| /* ARM32 ==> Intel StrongARM */ |
| /* IA64 ==> Intel IPF */ |
| /* (e.g. Itanium) */ |
| /* (LINUX and HPUX) */ |
| /* IA64_32 ==> IA64 w/32 bit ABI */ |
| /* (HPUX) */ |
| /* SH ==> Hitachi SuperH */ |
| /* (LINUX & MSWINCE) */ |
| |
| |
| /* |
| * For each architecture and OS, the following need to be defined: |
| * |
| * CPP_WORD_SZ is a simple integer constant representing the word size. |
| * in bits. We assume byte addressibility, where a byte has 8 bits. |
| * We also assume CPP_WORD_SZ is either 32 or 64. |
| * (We care about the length of pointers, not hardware |
| * bus widths. Thus a 64 bit processor with a C compiler that uses |
| * 32 bit pointers should use CPP_WORD_SZ of 32, not 64. Default is 32.) |
| * |
| * MACH_TYPE is a string representation of the machine type. |
| * OS_TYPE is analogous for the OS. |
| * |
| * ALIGNMENT is the largest N, such that |
| * all pointer are guaranteed to be aligned on N byte boundaries. |
| * defining it to be 1 will always work, but perform poorly. |
| * |
| * DATASTART is the beginning of the data segment. |
| * On UNIX systems, the collector will scan the area between DATASTART |
| * and DATAEND for root pointers. |
| * |
| * DATAEND, if not &end. |
| * |
| * ALIGN_DOUBLE of GC_malloc should return blocks aligned to twice |
| * the pointer size. |
| * |
| * STACKBOTTOM is the cool end of the stack, which is usually the |
| * highest address in the stack. |
| * Under PCR or OS/2, we have other ways of finding thread stacks. |
| * For each machine, the following should: |
| * 1) define STACK_GROWS_UP if the stack grows toward higher addresses, and |
| * 2) define exactly one of |
| * STACKBOTTOM (should be defined to be an expression) |
| * HEURISTIC1 |
| * HEURISTIC2 |
| * If either of the last two macros are defined, then STACKBOTTOM is computed |
| * during collector startup using one of the following two heuristics: |
| * HEURISTIC1: Take an address inside GC_init's frame, and round it up to |
| * the next multiple of STACK_GRAN. |
| * HEURISTIC2: Take an address inside GC_init's frame, increment it repeatedly |
| * in small steps (decrement if STACK_GROWS_UP), and read the value |
| * at each location. Remember the value when the first |
| * Segmentation violation or Bus error is signalled. Round that |
| * to the nearest plausible page boundary, and use that instead |
| * of STACKBOTTOM. |
| * |
| * Gustavo Rodriguez-Rivera points out that on most (all?) Unix machines, |
| * the value of environ is a pointer that can serve as STACKBOTTOM. |
| * I expect that HEURISTIC2 can be replaced by this approach, which |
| * interferes far less with debugging. 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. |
| */ |
| |
| /* If we are using a recent version of gcc, we can use __builtin_unwind_init() |
| * to push the relevant registers onto the stack. This generally makes |
| * USE_GENERIC_PUSH_REGS the preferred approach for marking from registers. |
| */ |
| # if defined(__GNUC__) && ((__GNUC__ >= 3) || \ |
| (__GNUC__ == 2 && __GNUC_MINOR__ >= 8)) |
| # define HAVE_BUILTIN_UNWIND_INIT |
| # endif |
| |
| # define STACK_GRAN 0x1000000 |
| # ifdef M68K |
| # define MACH_TYPE "M68K" |
| # define ALIGNMENT 2 |
| # ifdef OPENBSD |
| # define OS_TYPE "OPENBSD" |
| # define HEURISTIC2 |
| extern char etext; |
| # define DATASTART ((ptr_t)(&etext)) |
| # endif |
| # ifdef NETBSD |
| # define OS_TYPE "NETBSD" |
| # define HEURISTIC2 |
| extern char etext; |
| # define DATASTART ((ptr_t)(&etext)) |
| # endif |
| # ifdef LINUX |
| # define OS_TYPE "LINUX" |
| # define STACKBOTTOM ((ptr_t)0xf0000000) |
| /* # define MPROTECT_VDB - Reported to not work 9/17/01 */ |
| # ifdef __ELF__ |
| # define DYNAMIC_LOADING |
| # include <features.h> |
| # if defined(__GLIBC__)&& __GLIBC__>=2 |
| # define LINUX_DATA_START |
| # else /* !GLIBC2 */ |
| extern char **__environ; |
| # define DATASTART ((ptr_t)(&__environ)) |
| /* hideous kludge: __environ is the first */ |
| /* word in crt0.o, and delimits the start */ |
| /* of the data segment, no matter which */ |
| /* ld options were passed through. */ |
| /* We could use _etext instead, but that */ |
| /* would include .rodata, which may */ |
| /* contain large read-only data tables */ |
| /* that we'd rather not scan. */ |
| # endif /* !GLIBC2 */ |
| extern int _end; |
| # define DATAEND (&_end) |
| # else |
| extern int etext; |
| # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff)) |
| # endif |
| # endif |
| # ifdef SUNOS4 |
| # define OS_TYPE "SUNOS4" |
| extern char etext; |
| # define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ffff) & ~0x1ffff)) |
| # define HEURISTIC1 /* differs */ |
| # define DYNAMIC_LOADING |
| # endif |
| # ifdef HP |
| # define OS_TYPE "HP" |
| extern char etext; |
| # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff)) |
| # define STACKBOTTOM ((ptr_t) 0xffeffffc) |
| /* empirically determined. seems to work. */ |
| # include <unistd.h> |
| # define GETPAGESIZE() sysconf(_SC_PAGE_SIZE) |
| # endif |
| # ifdef SYSV |
| # define OS_TYPE "SYSV" |
| extern etext; |
| # define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \ |
| & ~0x3fffff) \ |
| +((word)&etext & 0x1fff)) |
| /* This only works for shared-text binaries with magic number 0413. |
| The other sorts of SysV binaries put the data at the end of the text, |
| in which case the default of &etext would work. Unfortunately, |
| handling both would require having the magic-number available. |
| -- Parag |
| */ |
| # define STACKBOTTOM ((ptr_t)0xFFFFFFFE) |
| /* The stack starts at the top of memory, but */ |
| /* 0x0 cannot be used as setjump_test complains */ |
| /* that the stack direction is incorrect. Two */ |
| /* bytes down from 0x0 should be safe enough. */ |
| /* --Parag */ |
| # include <sys/mmu.h> |
| # define GETPAGESIZE() PAGESIZE /* Is this still right? */ |
| # endif |
| # ifdef AMIGA |
| # define OS_TYPE "AMIGA" |
| /* STACKBOTTOM and DATASTART handled specially */ |
| /* in os_dep.c */ |
| # define DATAEND /* not needed */ |
| # define GETPAGESIZE() 4096 |
| # endif |
| # ifdef MACOS |
| # ifndef __LOWMEM__ |
| # include <LowMem.h> |
| # endif |
| # define OS_TYPE "MACOS" |
| /* see os_dep.c for details of global data segments. */ |
| # define STACKBOTTOM ((ptr_t) LMGetCurStackBase()) |
| # define DATAEND /* not needed */ |
| # define GETPAGESIZE() 4096 |
| # endif |
| # ifdef NEXT |
| # define OS_TYPE "NEXT" |
| # define DATASTART ((ptr_t) get_etext()) |
| # define STACKBOTTOM ((ptr_t) 0x4000000) |
| # define DATAEND /* not needed */ |
| # endif |
| # endif |
| |
| # ifdef POWERPC |
| # define MACH_TYPE "POWERPC" |
| # ifdef MACOS |
| # define ALIGNMENT 2 /* Still necessary? Could it be 4? */ |
| # ifndef __LOWMEM__ |
| # include <LowMem.h> |
| # endif |
| # define OS_TYPE "MACOS" |
| /* see os_dep.c for details of global data segments. */ |
| # define STACKBOTTOM ((ptr_t) LMGetCurStackBase()) |
| # define DATAEND /* not needed */ |
| # endif |
| # ifdef LINUX |
| # define ALIGNMENT 4 /* Guess. Can someone verify? */ |
| /* This was 2, but that didn't sound right. */ |
| # define OS_TYPE "LINUX" |
| # define HEURISTIC1 |
| # define DYNAMIC_LOADING |
| # undef STACK_GRAN |
| # define STACK_GRAN 0x10000000 |
| /* Stack usually starts at 0x80000000 */ |
| # define LINUX_DATA_START |
| extern int _end; |
| # define DATAEND (&_end) |
| # endif |
| # ifdef MACOSX |
| /* There are reasons to suspect this may not be reliable. */ |
| # define ALIGNMENT 4 |
| # define OS_TYPE "MACOSX" |
| # define DATASTART ((ptr_t) get_etext()) |
| # define STACKBOTTOM ((ptr_t) 0xc0000000) |
| # define DATAEND /* not needed */ |
| # define MPROTECT_VDB |
| # include <unistd.h> |
| # define GETPAGESIZE() getpagesize() |
| # endif |
| # ifdef NETBSD |
| # define ALIGNMENT 4 |
| # define OS_TYPE "NETBSD" |
| # define HEURISTIC2 |
| extern char etext; |
| # define DATASTART GC_data_start |
| # define DYNAMIC_LOADING |
| # endif |
| # ifdef NOSYS |
| # define ALIGNMENT 4 |
| # define OS_TYPE "NOSYS" |
| extern void __end, __dso_handle; |
| # define DATASTART (&__dso_handle) /* OK, that's ugly. */ |
| # define DATAEND (&__end) |
| /* Stack starts at 0xE0000000 for the simulator. */ |
| # undef STACK_GRAN |
| # define STACK_GRAN 0x10000000 |
| # define HEURISTIC1 |
| # endif |
| # endif |
| |
| # ifdef VAX |
| # define MACH_TYPE "VAX" |
| # define ALIGNMENT 4 /* Pointers are longword aligned by 4.2 C compiler */ |
| extern char etext; |
| # define DATASTART ((ptr_t)(&etext)) |
| # ifdef BSD |
| # define OS_TYPE "BSD" |
| # define HEURISTIC1 |
| /* HEURISTIC2 may be OK, but it's hard to test. */ |
| # endif |
| # ifdef ULTRIX |
| # define OS_TYPE "ULTRIX" |
| # define STACKBOTTOM ((ptr_t) 0x7fffc800) |
| # endif |
| # endif |
| |
| # ifdef RT |
| # define MACH_TYPE "RT" |
| # define ALIGNMENT 4 |
| # define DATASTART ((ptr_t) 0x10000000) |
| # define STACKBOTTOM ((ptr_t) 0x1fffd800) |
| # endif |
| |
| # ifdef SPARC |
| # define MACH_TYPE "SPARC" |
| # if defined(__arch64__) || defined(__sparcv9) |
| # define ALIGNMENT 8 |
| # define CPP_WORDSZ 64 |
| # define ELF_CLASS ELFCLASS64 |
| # else |
| # define ALIGNMENT 4 /* Required by hardware */ |
| # endif |
| # define ALIGN_DOUBLE |
| # ifdef SUNOS5 |
| # define OS_TYPE "SUNOS5" |
| extern int _etext; |
| extern int _end; |
| extern char * GC_SysVGetDataStart(); |
| # define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext) |
| # define DATAEND (&_end) |
| # 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. */ |
| /* HEURISTIC2 probably works, but this appears to be preferable. */ |
| /* Apparently USRSTACK is defined to be USERLIMIT, but in some */ |
| /* installations that's undefined. We work around this with a */ |
| /* gross hack: */ |
| # include <sys/vmparam.h> |
| # ifdef USERLIMIT |
| /* This should work everywhere, but doesn't. */ |
| # define STACKBOTTOM USRSTACK |
| # else |
| # define HEURISTIC2 |
| # endif |
| # include <unistd.h> |
| # define GETPAGESIZE() sysconf(_SC_PAGESIZE) |
| /* getpagesize() appeared to be missing from at least one */ |
| /* Solaris 5.4 installation. Weird. */ |
| # define DYNAMIC_LOADING |
| # endif |
| # ifdef SUNOS4 |
| # define OS_TYPE "SUNOS4" |
| /* [If you have a weak stomach, don't read this.] */ |
| /* We would like to use: */ |
| /* # define DATASTART ((ptr_t)((((word) (&etext)) + 0x1fff) & ~0x1fff)) */ |
| /* This fails occasionally, due to an ancient, but very */ |
| /* persistent ld bug. &etext is set 32 bytes too high. */ |
| /* We instead read the text segment size from the a.out */ |
| /* header, which happens to be mapped into our address space */ |
| /* at the start of the text segment. The detective work here */ |
| /* was done by Robert Ehrlich, Manuel Serrano, and Bernard */ |
| /* Serpette of INRIA. */ |
| /* This assumes ZMAGIC, i.e. demand-loadable executables. */ |
| # define TEXTSTART 0x2000 |
| # define DATASTART ((ptr_t)(*(int *)(TEXTSTART+0x4)+TEXTSTART)) |
| # define MPROTECT_VDB |
| # define HEURISTIC1 |
| # define DYNAMIC_LOADING |
| # endif |
| # ifdef DRSNX |
| # define 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 DYNAMIC_LOADING |
| # else |
| Linux Sparc/a.out not supported |
| # endif |
| extern int _end; |
| extern int _etext; |
| # define DATAEND (&_end) |
| # define SVR4 |
| # ifdef __arch64__ |
| # define STACKBOTTOM ((ptr_t) 0x80000000000ULL) |
| # define DATASTART (ptr_t)GC_SysVGetDataStart(0x100000, &_etext) |
| # define CPP_WORDSZ 64 |
| # else |
| # define STACKBOTTOM ((ptr_t) 0xf0000000) |
| # define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext) |
| # endif |
| # endif |
| # ifdef OPENBSD |
| # define OS_TYPE "OPENBSD" |
| # define STACKBOTTOM ((ptr_t) 0xf8000000) |
| extern int etext; |
| # define DATASTART ((ptr_t)(&etext)) |
| # endif |
| # ifdef NETBSD |
| # define OS_TYPE "NETBSD" |
| # define HEURISTIC2 |
| # ifdef __ELF__ |
| # define DATASTART GC_data_start |
| # define DYNAMIC_LOADING |
| # else |
| extern char etext; |
| # define DATASTART ((ptr_t)(&etext)) |
| # endif |
| # endif |
| # endif |
| |
| # ifdef I386 |
| # define MACH_TYPE "I386" |
| # define ALIGNMENT 4 /* Appears to hold for all "32 bit" compilers */ |
| /* except Borland. The -a4 option fixes */ |
| /* Borland. */ |
| /* Ivan Demakov: For Watcom the option is -zp4. */ |
| # ifndef SMALL_CONFIG |
| # define ALIGN_DOUBLE /* Not strictly necessary, but may give speed */ |
| /* improvement on Pentiums. */ |
| # endif |
| # ifdef HAVE_BUILTIN_UNWIND_INIT |
| # define USE_GENERIC_PUSH_REGS |
| # endif |
| # ifdef SEQUENT |
| # define OS_TYPE "SEQUENT" |
| extern int etext; |
| # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff)) |
| # define STACKBOTTOM ((ptr_t) 0x3ffff000) |
| # endif |
| # ifdef BEOS |
| # define OS_TYPE "BEOS" |
| # include <OS.h> |
| # define GETPAGESIZE() B_PAGE_SIZE |
| extern int etext; |
| # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff)) |
| # endif |
| # ifdef SUNOS5 |
| # define OS_TYPE "SUNOS5" |
| extern int _etext, _end; |
| extern char * GC_SysVGetDataStart(); |
| # define DATASTART GC_SysVGetDataStart(0x1000, &_etext) |
| # define DATAEND (&_end) |
| /* # define STACKBOTTOM ((ptr_t)(&_start)) worked through 2.7, */ |
| /* but reportedly breaks under 2.8. It appears that the stack */ |
| /* base is a property of the executable, so this should not break */ |
| /* old executables. */ |
| /* HEURISTIC2 probably works, but this appears to be preferable. */ |
| # include <sys/vmparam.h> |
| # define STACKBOTTOM USRSTACK |
| /** At least in Solaris 2.5, PROC_VDB gives wrong values for dirty bits. */ |
| # ifdef SOLARIS25_PROC_VDB_BUG_FIXED |
| # define PROC_VDB |
| # endif |
| # 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(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> |
| # if defined(__GLIBC__) && __GLIBC__ >= 2 |
| # define LINUX_DATA_START |
| # else |
| extern char **__environ; |
| # define DATASTART ((ptr_t)(&__environ)) |
| /* hideous kludge: __environ is the first */ |
| /* word in crt0.o, and delimits the start */ |
| /* of the data segment, no matter which */ |
| /* ld options were passed through. */ |
| /* We could use _etext instead, but that */ |
| /* would include .rodata, which may */ |
| /* contain large read-only data tables */ |
| /* that we'd rather not scan. */ |
| # endif |
| extern int _end; |
| # define DATAEND (&_end) |
| # else |
| extern int etext; |
| # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff)) |
| # endif |
| # ifdef USE_I686_PREFETCH |
| # define PREFETCH(x) \ |
| __asm__ __volatile__ (" prefetchnta %0": : "m"(*(char *)(x))) |
| /* Empirically prefetcht0 is much more effective at reducing */ |
| /* cache miss stalls for the targetted load instructions. But it */ |
| /* seems to interfere enough with other cache traffic that the net */ |
| /* result is worse than prefetchnta. */ |
| # if 0 |
| /* Using prefetches for write seems to have a slight negative */ |
| /* impact on performance, at least for a PIII/500. */ |
| # define PREFETCH_FOR_WRITE(x) \ |
| __asm__ __volatile__ (" prefetcht0 %0": : "m"(*(char *)(x))) |
| # endif |
| # endif |
| # ifdef USE_3DNOW_PREFETCH |
| # define PREFETCH(x) \ |
| __asm__ __volatile__ (" prefetch %0": : "m"(*(char *)(x))) |
| # define PREFETCH_FOR_WRITE(x) \ |
| __asm__ __volatile__ (" prefetchw %0": : "m"(*(char *)(x))) |
| # endif |
| # endif |
| # ifdef CYGWIN32 |
| # define OS_TYPE "CYGWIN32" |
| extern int _data_start__; |
| extern int _data_end__; |
| extern int _bss_start__; |
| extern int _bss_end__; |
| /* For binutils 2.9.1, we have */ |
| /* DATASTART = _data_start__ */ |
| /* DATAEND = _bss_end__ */ |
| /* whereas for some earlier versions it was */ |
| /* DATASTART = _bss_start__ */ |
| /* DATAEND = _data_end__ */ |
| /* To get it right for both, we take the */ |
| /* minumum/maximum of the two. */ |
| # define MAX(x,y) ((x) > (y) ? (x) : (y)) |
| # define MIN(x,y) ((x) < (y) ? (x) : (y)) |
| # define DATASTART ((ptr_t) MIN(&_data_start__, &_bss_start__)) |
| # define DATAEND ((ptr_t) MAX(&_data_end__, &_bss_end__)) |
| # undef STACK_GRAN |
| # define STACK_GRAN 0x10000 |
| # define HEURISTIC1 |
| # endif |
| # ifdef OS2 |
| # define OS_TYPE "OS2" |
| /* STACKBOTTOM and DATASTART are handled specially in */ |
| /* os_dep.c. OS2 actually has the right */ |
| /* system call! */ |
| # define DATAEND /* not needed */ |
| # define USE_GENERIC_PUSH_REGS |
| # endif |
| # ifdef MSWIN32 |
| # define OS_TYPE "MSWIN32" |
| /* STACKBOTTOM and DATASTART are handled specially in */ |
| /* os_dep.c. */ |
| # ifndef __WATCOMC__ |
| # define MPROTECT_VDB |
| # endif |
| # define DATAEND /* not needed */ |
| # endif |
| # ifdef MSWINCE |
| # define OS_TYPE "MSWINCE" |
| # define DATAEND /* not needed */ |
| # endif |
| # ifdef DJGPP |
| # define OS_TYPE "DJGPP" |
| # include "stubinfo.h" |
| extern int etext; |
| extern int _stklen; |
| extern int __djgpp_stack_limit; |
| # define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ff) & ~0x1ff)) |
| /* # define STACKBOTTOM ((ptr_t)((word) _stubinfo + _stubinfo->size \ |
| + _stklen)) */ |
| # define STACKBOTTOM ((ptr_t)((word) __djgpp_stack_limit + _stklen)) |
| /* This may not be right. */ |
| # endif |
| # ifdef OPENBSD |
| # define OS_TYPE "OPENBSD" |
| # endif |
| # ifdef FREEBSD |
| # define OS_TYPE "FREEBSD" |
| # ifndef GC_FREEBSD_THREADS |
| # define MPROTECT_VDB |
| # endif |
| # define SIG_SUSPEND SIGUSR1 |
| # define SIG_THR_RESTART SIGUSR2 |
| # define FREEBSD_STACKBOTTOM |
| # ifdef __ELF__ |
| # define DYNAMIC_LOADING |
| # endif |
| # 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(NETBSD) || defined(FREEBSD) \ |
| || defined(THREE86BSD) || defined(BSDI) |
| # define HEURISTIC2 |
| extern char etext; |
| # define DATASTART ((ptr_t)(&etext)) |
| # endif |
| # ifdef NEXT |
| # define OS_TYPE "NEXT" |
| # define DATASTART ((ptr_t) get_etext()) |
| # define STACKBOTTOM ((ptr_t)0xc0000000) |
| # define DATAEND /* not needed */ |
| # endif |
| # ifdef DOS4GW |
| # define OS_TYPE "DOS4GW" |
| extern long __nullarea; |
| extern char _end; |
| extern char *_STACKTOP; |
| /* Depending on calling conventions Watcom C either precedes |
| or does not precedes with undescore names of C-variables. |
| Make sure startup code variables always have the same names. */ |
| #pragma aux __nullarea "*"; |
| #pragma aux _end "*"; |
| # define STACKBOTTOM ((ptr_t) _STACKTOP) |
| /* confused? me too. */ |
| # define DATASTART ((ptr_t) &__nullarea) |
| # define DATAEND ((ptr_t) &_end) |
| # endif |
| # ifdef HURD |
| # define OS_TYPE "HURD" |
| # define STACK_GROWS_DOWN |
| # define HEURISTIC2 |
| extern int __data_start; |
| # define DATASTART ( (ptr_t) (&__data_start)) |
| extern int _end; |
| # define DATAEND ( (ptr_t) (&_end)) |
| /* # define MPROTECT_VDB Not quite working yet? */ |
| # define DYNAMIC_LOADING |
| # endif |
| # endif |
| |
| # ifdef NS32K |
| # define MACH_TYPE "NS32K" |
| # define ALIGNMENT 4 |
| extern char **environ; |
| # define DATASTART ((ptr_t)(&environ)) |
| /* hideous kludge: environ is the first */ |
| /* word in crt0.o, and delimits the start */ |
| /* of the data segment, no matter which */ |
| /* ld options were passed through. */ |
| # define STACKBOTTOM ((ptr_t) 0xfffff000) /* for Encore */ |
| # endif |
| |
| # ifdef MIPS |
| # define MACH_TYPE "MIPS" |
| # ifdef LINUX |
| /* This was developed for a linuxce style platform. Probably */ |
| /* needs to be tweaked for workstation class machines. */ |
| # define OS_TYPE "LINUX" |
| extern int __data_start; |
| # define DATASTART ((ptr_t)(&__data_start)) |
| # define ALIGNMENT 4 |
| # define USE_GENERIC_PUSH_REGS |
| # define STACKBOTTOM ((ptr_t)0x7fff8000) |
| /* Older toolchains may need 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 |
| # ifdef MSWINCE |
| # define OS_TYPE "MSWINCE" |
| # define ALIGNMENT 4 |
| # define DATAEND /* not needed */ |
| # endif |
| # if defined(NETBSD) |
| /* This also checked for __MIPSEL__ . Why? NETBSD recognition */ |
| /* should be handled at the top of the file. */ |
| # define ALIGNMENT 4 |
| # define OS_TYPE "NETBSD" |
| # define HEURISTIC2 |
| # define USE_GENERIC_PUSH_REGS |
| # ifdef __ELF__ |
| extern int etext; |
| # define DATASTART GC_data_start |
| # define NEED_FIND_LIMIT |
| # define DYNAMIC_LOADING |
| # else |
| # define DATASTART ((ptr_t) 0x10000000) |
| # define STACKBOTTOM ((ptr_t) 0x7ffff000) |
| # endif /* _ELF_ */ |
| # endif |
| # endif |
| |
| # ifdef RS6000 |
| # define MACH_TYPE "RS6000" |
| # define ALIGNMENT 4 |
| # define DATASTART ((ptr_t)0x20000000) |
| extern int errno; |
| # define STACKBOTTOM ((ptr_t)((ulong)&errno)) |
| # define DYNAMIC_LOADING |
| /* For really old versions of AIX, this may have to be removed. */ |
| # endif |
| |
| # ifdef HP_PA |
| # define MACH_TYPE "HP_PA" |
| # 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 LINUX_DATA_START |
| extern int _end; |
| # define DATAEND (&_end) |
| # endif /* LINUX */ |
| # endif /* HP_PA */ |
| |
| # ifdef ALPHA |
| # define MACH_TYPE "ALPHA" |
| # define ALIGNMENT 8 |
| # ifdef NETBSD |
| # define OS_TYPE "NETBSD" |
| # define HEURISTIC2 |
| # define DATASTART GC_data_start |
| # define ELFCLASS32 32 |
| # define ELFCLASS64 64 |
| # define ELF_CLASS ELFCLASS64 |
| # define CPP_WORDSZ 64 |
| # define DYNAMIC_LOADING |
| # endif |
| # ifdef OPENBSD |
| # define OS_TYPE "OPENBSD" |
| # define HEURISTIC2 |
| # define CPP_WORDSZ 64 |
| # ifdef __ELF__ /* since OpenBSD/Alpha 2.9 */ |
| # define DATASTART GC_data_start |
| # define ELFCLASS32 32 |
| # define ELFCLASS64 64 |
| # define ELF_CLASS ELFCLASS64 |
| # else /* ECOFF, until OpenBSD/Alpha 2.7 */ |
| # define DATASTART ((ptr_t) 0x140000000) |
| # endif |
| # endif |
| # ifdef OSF1 |
| # define OS_TYPE "OSF1" |
| # define DATASTART ((ptr_t) 0x140000000) |
| extern int _end; |
| # define DATAEND ((ptr_t) &_end) |
| extern char ** environ; |
| /* round up from the value of environ to the nearest page boundary */ |
| /* Probably breaks if putenv is called before collector */ |
| /* initialization. */ |
| # define STACKBOTTOM ((ptr_t)(((word)(environ) | (getpagesize()-1))+1)) |
| /* # define HEURISTIC2 */ |
| /* Normally HEURISTIC2 is too conervative, since */ |
| /* the text segment immediately follows the stack. */ |
| /* Hence we give an upper pound. */ |
| /* This is currently unused, since we disabled HEURISTIC2 */ |
| extern int __start; |
| # define HEURISTIC2_LIMIT ((ptr_t)((word)(&__start) & ~(getpagesize()-1))) |
| # define CPP_WORDSZ 64 |
| # define MPROTECT_VDB |
| # define DYNAMIC_LOADING |
| # endif |
| # ifdef LINUX |
| # define OS_TYPE "LINUX" |
| # define CPP_WORDSZ 64 |
| # define STACKBOTTOM ((ptr_t) 0x120000000) |
| # ifdef __ELF__ |
| # define SEARCH_FOR_DATA_START |
| # define DATASTART GC_data_start |
| # define DYNAMIC_LOADING |
| # else |
| # define DATASTART ((ptr_t) 0x140000000) |
| # endif |
| extern int _end; |
| # define DATAEND (&_end) |
| # define MPROTECT_VDB |
| /* Has only been superficially tested. May not */ |
| /* work on all versions. */ |
| # endif |
| # endif |
| |
| # ifdef IA64 |
| # define MACH_TYPE "IA64" |
| # define USE_GENERIC_PUSH_REGS |
| /* We need to get preserved registers in addition to register */ |
| /* windows. That's easiest to do with setjmp. */ |
| # ifdef PARALLEL_MARK |
| # define USE_MARK_BYTES |
| /* Compare-and-exchange is too expensive to use for */ |
| /* setting mark bits. */ |
| # endif |
| # ifdef HPUX |
| # ifdef _ILP32 |
| # define CPP_WORDSZ 32 |
| # define ALIGN_DOUBLE |
| /* Requires 8 byte alignment for malloc */ |
| # define ALIGNMENT 4 |
| # else |
| # ifndef _LP64 |
| ---> unknown ABI |
| # endif |
| # define CPP_WORDSZ 64 |
| # define ALIGN_DOUBLE |
| /* Requires 16 byte alignment for malloc */ |
| # define ALIGNMENT 8 |
| # endif |
| # define OS_TYPE "HPUX" |
| extern int __data_start; |
| # define DATASTART ((ptr_t)(&__data_start)) |
| /* Gustavo Rodriguez-Rivera suggested changing HEURISTIC2 */ |
| /* to this. Note that the GC must be initialized before the */ |
| /* first putenv call. */ |
| extern char ** environ; |
| # define STACKBOTTOM ((ptr_t)environ) |
| # define DYNAMIC_LOADING |
| # include <unistd.h> |
| # define GETPAGESIZE() sysconf(_SC_PAGE_SIZE) |
| /* The following was empirically determined, and is probably */ |
| /* not very robust. */ |
| /* Note that the backing store base seems to be at a nice */ |
| /* address minus one page. */ |
| # define BACKING_STORE_DISPLACEMENT 0x1000000 |
| # define BACKING_STORE_ALIGNMENT 0x1000 |
| # define BACKING_STORE_BASE \ |
| (ptr_t)(((word)GC_stackbottom - BACKING_STORE_DISPLACEMENT - 1) \ |
| & ~(BACKING_STORE_ALIGNMENT - 1)) |
| # endif |
| # ifdef LINUX |
| # define CPP_WORDSZ 64 |
| # define ALIGN_DOUBLE |
| /* Requires 16 byte alignment for malloc */ |
| # define ALIGNMENT 8 |
| # define OS_TYPE "LINUX" |
| /* The following works on NUE and older kernels: */ |
| /* # define STACKBOTTOM ((ptr_t) 0xa000000000000000l) */ |
| /* This does not work on NUE: */ |
| # define LINUX_STACKBOTTOM |
| /* We also need the base address of the register stack */ |
| /* backing store. This is computed in */ |
| /* GC_linux_register_stack_base based on the following */ |
| /* constants: */ |
| # define BACKING_STORE_ALIGNMENT 0x100000 |
| # define BACKING_STORE_DISPLACEMENT 0x80000000 |
| extern char * GC_register_stackbottom; |
| # define BACKING_STORE_BASE ((ptr_t)GC_register_stackbottom) |
| # define SEARCH_FOR_DATA_START |
| # define DATASTART GC_data_start |
| # define DYNAMIC_LOADING |
| # define MPROTECT_VDB |
| /* Requires Linux 2.3.47 or later. */ |
| extern int _end; |
| # define DATAEND (&_end) |
| # ifdef __GNUC__ |
| # define PREFETCH(x) \ |
| __asm__ (" lfetch [%0]": : "r"((void *)(x))) |
| # define PREFETCH_FOR_WRITE(x) \ |
| __asm__ (" lfetch.excl [%0]": : "r"((void *)(x))) |
| # define CLEAR_DOUBLE(x) \ |
| __asm__ (" stf.spill [%0]=f0": : "r"((void *)(x))) |
| # endif |
| # endif |
| # endif |
| |
| # ifdef M88K |
| # define MACH_TYPE "M88K" |
| # define ALIGNMENT 4 |
| # define ALIGN_DOUBLE |
| extern int etext; |
| # ifdef CX_UX |
| # define OS_TYPE "CX_UX" |
| # define DATASTART ((((word)&etext + 0x3fffff) & ~0x3fffff) + 0x10000) |
| # endif |
| # ifdef DGUX |
| # define OS_TYPE "DGUX" |
| extern char * GC_SysVGetDataStart(); |
| # define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &etext) |
| # endif |
| # define STACKBOTTOM ((char*)0xf0000000) /* determined empirically */ |
| # endif |
| |
| # ifdef S370 |
| # define MACH_TYPE "S370" |
| # define ALIGNMENT 4 /* Required by hardware */ |
| # define USE_GENERIC_PUSH_REGS |
| # ifdef UTS4 |
| # define OS_TYPE "UTS4" |
| extern int etext; |
| extern int _etext; |
| extern int _end; |
| extern char * GC_SysVGetDataStart(); |
| # define DATASTART (ptr_t)GC_SysVGetDataStart(0x10000, &_etext) |
| # define DATAEND (&_end) |
| # define HEURISTIC2 |
| # endif |
| # ifdef LINUX |
| # define OS_TYPE "LINUX" |
| # define HEURISTIC1 |
| # define DYNAMIC_LOADING |
| extern int __data_start; |
| # define DATASTART ((ptr_t)(&__data_start)) |
| # endif |
| # endif |
| |
| # if defined(PJ) |
| # define ALIGNMENT 4 |
| extern int _etext; |
| # define DATASTART ((ptr_t)(&_etext)) |
| # define HEURISTIC1 |
| # endif |
| |
| # ifdef ARM32 |
| # define CPP_WORDSZ 32 |
| # define MACH_TYPE "ARM32" |
| # define ALIGNMENT 4 |
| # ifdef NETBSD |
| # define OS_TYPE "NETBSD" |
| # define HEURISTIC2 |
| extern char etext; |
| # define DATASTART ((ptr_t)(&etext)) |
| # define USE_GENERIC_PUSH_REGS |
| # endif |
| # ifdef LINUX |
| # define OS_TYPE "LINUX" |
| # define HEURISTIC1 |
| # undef STACK_GRAN |
| # define STACK_GRAN 0x10000000 |
| # define USE_GENERIC_PUSH_REGS |
| # ifdef __ELF__ |
| # define DYNAMIC_LOADING |
| # include <features.h> |
| # if defined(__GLIBC__) && __GLIBC__ >= 2 |
| # define LINUX_DATA_START |
| # else |
| extern char **__environ; |
| # define DATASTART ((ptr_t)(&__environ)) |
| /* hideous kludge: __environ is the first */ |
| /* word in crt0.o, and delimits the start */ |
| /* of the data segment, no matter which */ |
| /* ld options were passed through. */ |
| /* We could use _etext instead, but that */ |
| /* would include .rodata, which may */ |
| /* contain large read-only data tables */ |
| /* that we'd rather not scan. */ |
| # endif |
| extern int _end; |
| # define DATAEND (&_end) |
| # else |
| extern int etext; |
| # define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff)) |
| # endif |
| # endif |
| # ifdef MSWINCE |
| # define OS_TYPE "MSWINCE" |
| # define DATAEND /* not needed */ |
| # endif |
| #endif |
| |
| # ifdef SH |
| # define MACH_TYPE "SH" |
| # define ALIGNMENT 4 |
| # ifdef MSWINCE |
| # define OS_TYPE "MSWINCE" |
| # define DATAEND /* not needed */ |
| # endif |
| # ifdef LINUX |
| # define OS_TYPE "LINUX" |
| # define STACKBOTTOM ((ptr_t) 0x7c000000) |
| # define USE_GENERIC_PUSH_REGS |
| # define DYNAMIC_LOADING |
| # define LINUX_DATA_START |
| extern int _end; |
| # define DATAEND (&_end) |
| # endif |
| # endif |
| |
| # ifdef SH4 |
| # define MACH_TYPE "SH4" |
| # define OS_TYPE "MSWINCE" |
| # define ALIGNMENT 4 |
| # define DATAEND /* not needed */ |
| # endif |
| |
| #ifdef LINUX_DATA_START |
| /* Some Linux distributions arrange to define __data_start. Some */ |
| /* define data_start as a weak symbol. The latter is technically */ |
| /* broken, since the user program may define data_start, in which */ |
| /* case we lose. Nonetheless, we try both, prefering __data_start. */ |
| /* We assume gcc. */ |
| # pragma weak __data_start |
| extern int __data_start; |
| # pragma weak data_start |
| extern int data_start; |
| # define DATASTART ((ptr_t)(&__data_start != 0? &__data_start : &data_start)) |
| #endif |
| |
| #if defined(LINUX) && defined(REDIRECT_MALLOC) |
| /* Rld appears to allocate some memory with its own allocator, and */ |
| /* some through malloc, which might be redirected. To make this */ |
| /* work with collectable memory, we have to scan memory allocated */ |
| /* by rld's internal malloc. */ |
| # define USE_PROC_FOR_LIBRARIES |
| #endif |
| |
| # ifndef STACK_GROWS_UP |
| # define STACK_GROWS_DOWN |
| # endif |
| |
| # ifndef CPP_WORDSZ |
| # define CPP_WORDSZ 32 |
| # endif |
| |
| # ifndef OS_TYPE |
| # define OS_TYPE "" |
| # endif |
| |
| # ifndef DATAEND |
| extern int end; |
| # define DATAEND (&end) |
| # endif |
| |
| # if defined(SVR4) && !defined(GETPAGESIZE) |
| # include <unistd.h> |
| # define GETPAGESIZE() sysconf(_SC_PAGESIZE) |
| # endif |
| |
| # ifndef GETPAGESIZE |
| # if defined(SUNOS5) || defined(IRIX5) |
| # include <unistd.h> |
| # endif |
| # define GETPAGESIZE() getpagesize() |
| # endif |
| |
| # if defined(SUNOS5) || defined(DRSNX) || defined(UTS4) |
| /* OS has SVR4 generic features. Probably others also qualify. */ |
| # define SVR4 |
| # endif |
| |
| # if defined(SUNOS5) || defined(DRSNX) |
| /* OS has SUNOS5 style semi-undocumented interface to dynamic */ |
| /* loader. */ |
| # define SUNOS5DL |
| /* OS has SUNOS5 style signal handlers. */ |
| # define SUNOS5SIGS |
| # endif |
| |
| # if defined(HPUX) |
| # define SUNOS5SIGS |
| # endif |
| |
| # if defined(SVR4) || defined(LINUX) || defined(IRIX) || defined(HPUX) \ |
| || defined(OPENBSD) || defined(NETBSD) || defined(FREEBSD) \ |
| || defined(BSD) || defined(AIX) || defined(MACOSX) || defined(OSF1) |
| # define UNIX_LIKE /* Basic Unix-like system calls work. */ |
| # endif |
| |
| # if CPP_WORDSZ != 32 && CPP_WORDSZ != 64 |
| -> bad word size |
| # endif |
| |
| # ifdef PCR |
| # undef DYNAMIC_LOADING |
| # undef STACKBOTTOM |
| # undef HEURISTIC1 |
| # undef HEURISTIC2 |
| # undef PROC_VDB |
| # undef MPROTECT_VDB |
| # define PCR_VDB |
| # endif |
| |
| # ifdef SRC_M3 |
| /* Postponed for now. */ |
| # undef PROC_VDB |
| # undef MPROTECT_VDB |
| # endif |
| |
| # ifdef SMALL_CONFIG |
| /* Presumably not worth the space it takes. */ |
| # undef PROC_VDB |
| # undef MPROTECT_VDB |
| # endif |
| |
| # ifdef USE_MUNMAP |
| # undef MPROTECT_VDB /* Can't deal with address space holes. */ |
| # endif |
| |
| # ifdef PARALLEL_MARK |
| # undef MPROTECT_VDB /* For now. */ |
| # endif |
| |
| # if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB) |
| # define DEFAULT_VDB |
| # endif |
| |
| # ifndef PREFETCH |
| # define PREFETCH(x) |
| # define NO_PREFETCH |
| # endif |
| |
| # ifndef PREFETCH_FOR_WRITE |
| # define PREFETCH_FOR_WRITE(x) |
| # define NO_PREFETCH_FOR_WRITE |
| # endif |
| |
| # ifndef CACHE_LINE_SIZE |
| # define CACHE_LINE_SIZE 32 /* Wild guess */ |
| # endif |
| |
| # ifndef CLEAR_DOUBLE |
| # define CLEAR_DOUBLE(x) \ |
| ((word*)x)[0] = 0; \ |
| ((word*)x)[1] = 0; |
| # endif /* CLEAR_DOUBLE */ |
| |
| /* Internally we use GC_SOLARIS_THREADS to test for either old or pthreads. */ |
| # if defined(GC_SOLARIS_PTHREADS) && !defined(GC_SOLARIS_THREADS) |
| # define GC_SOLARIS_THREADS |
| # endif |
| |
| # if defined(GC_IRIX_THREADS) && !defined(IRIX5) |
| --> inconsistent configuration |
| # endif |
| # if defined(GC_LINUX_THREADS) && !defined(LINUX) |
| --> inconsistent configuration |
| # endif |
| # if defined(GC_SOLARIS_THREADS) && !defined(SUNOS5) |
| --> inconsistent configuration |
| # endif |
| # if defined(GC_HPUX_THREADS) && !defined(HPUX) |
| --> inconsistent configuration |
| # endif |
| # if defined(GC_WIN32_THREADS) && !defined(MSWIN32) |
| /* Ideally CYGWIN32 should work, in addition to MSWIN32. I suspect */ |
| /* the necessary code is mostly there, but nobody has actually made */ |
| /* sure the right combination of pieces is compiled in, etc. */ |
| --> inconsistent configuration |
| # endif |
| |
| # if defined(PCR) || defined(SRC_M3) || \ |
| defined(GC_SOLARIS_THREADS) || defined(GC_WIN32_THREADS) || \ |
| defined(GC_PTHREADS) |
| # define THREADS |
| # endif |
| |
| # if defined(HP_PA) || defined(M88K) || defined(POWERPC) && !defined(MACOSX) \ |
| || defined(LINT) || defined(MSWINCE) \ |
| || (defined(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(I386) && defined(LINUX) |
| /* SAVE_CALL_CHAIN is supported if the code is compiled to save */ |
| /* frame pointers by default, i.e. no -fomit-frame-pointer flag. */ |
| # ifdef SAVE_CALL_COUNT |
| # define SAVE_CALL_CHAIN |
| # endif |
| # endif |
| # if defined(SPARC) |
| # 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 */ |