This is config.h in view mode; [Download] [Up]
#ifndef CONFIG_H
# define CONFIG_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. */
/* Determine the machine type: */
# if defined(sun) && defined(mc68000)
# define M68K
# define SUNOS
# define mach_type_known
# endif
# if defined(hp9000s300)
# define M68K
# define HP
# 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)
# define MIPS
# ifdef ultrix
# define ULTRIX
# else
# ifdef _SYSTYPE_SVR4
# define IRIX5
# else
# define RISCOS /* or IRIX 4.X */
# endif
# endif
# define mach_type_known
# endif
# if defined(sequent) && defined(i386)
# define I386
# define SEQUENT
# define mach_type_known
# endif
# if defined(sun) && defined(i386)
# define I386
# define SUNOS5
# define mach_type_known
# endif
# if defined(__OS2__) && defined(__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)
# 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(_IBMR2)
# define IBMRS6000
# define RS6000
# define mach_type_known
# endif
# if defined(SCO)
# define I386
# define SCO
# define mach_type_known
/* --> incompletely implemented */
# endif
# if defined(_AUX_SOURCE)
# define M68K
# define SYSV
# define mach_type_known
# endif
# if defined(_PA_RISC1_0) || defined(_PA_RISC1_1)
# define HP_PA
# define mach_type_known
# endif
# if defined(linux) && defined(i386)
# define I386
# define LINUX
# define mach_type_known
# endif
# if defined(__alpha)
# define ALPHA
# define mach_type_known
# endif
# if defined(_M88K)
# define M88K
# define mach_type_known
#endif
# if defined(__NeXT__)
# define M68K
# define MACH
# define mach_type_known
# endif
/* Feel free to add more clauses here */
/* Or manually define the machine type here. A machine type is */
/* characterized by the architecture. Some */
/* machine types are further subdivided by OS. */
/* the macros ULTRIX, RISCOS, and BSD to distinguish. */
/* Note that SGI IRIX is treated identically to RISCOS. */
/* SYSV on an M68K actually means A/UX. */
/* The distinction in these cases is usually the stack starting address */
# ifndef mach_type_known
--> unknown machine type
# endif
/* Mapping is: M68K ==> Motorola 680X0 */
/* (SUNOS, HP, and SYSV (A/UX) variants)*/
/* M68K_HP ==> HP9000/300 */
/* M68K_SYSV ==> A/UX, maybe others */
/* I386 ==> Intel 386 */
/* (SEQUENT, OS2, SCO, LINUX variants) */
/* SCO is incomplete. */
/* NS32K ==> Encore Multimax */
/* MIPS ==> R2000 or R3000 */
/* (RISCOS, ULTRIX variants) */
/* VAX ==> DEC VAX */
/* (BSD, ULTRIX variants) */
/* RS6000 ==> IBM RS/6000 AIX3.1 */
/* RT ==> IBM PC/RT */
/* HP_PA ==> HP9000/700 & /800 */
/* HP/UX */
/* SPARC ==> SPARC under SunOS */
/* (SUNOS4, SUNOS5 variants) */
/* ALPHA ==> DEC Alpha OSF/1 */
/*
* 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. Only 32 is completely
* implemented. (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.)
*
* 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 &end for root pointers.
*
* 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 16 MB.
* HEURISTIC2: Take an address inside GC_init's frame, increment it repeatedly
* in small steps (decrement if STACK_GROWS_UP), and read the value
* at each location. Remember the value when the first
* Segmentation violation or Bus error is signalled. Round that
* to the nearest plausible page boundary, and use that instead
* of STACKBOTTOM.
*
* If no expression for STACKBOTTOM can be found, and neither of the above
* heuristics are usable, the collector can still be used with all of the above
* undefined, provided one of the following is done:
* 1) GC_mark_roots can be changed to somehow mark from the correct stack(s)
* without reference to STACKBOTTOM. This is appropriate for use in
* conjunction with thread packages, since there will be multiple stacks.
* (Allocating thread stacks in the heap, and treating them as ordinary
* heap data objects is also possible as a last resort. However, this is
* likely to introduce significant amounts of excess storage retention
* unless the dead parts of the thread stacks are periodically cleared.)
* 2) Client code may set GC_stackbottom before calling any GC_ routines.
* If the author of the client code controls the main program, this is
* easily accomplished by introducing a new main program, setting
* GC_stackbottom to the address of a local variable, and then calling
* the original main program. The new main program would read something
* like:
*
* # include "gc_private.h"
*
* main(argc, argv, envp)
* int argc;
* char **argv, **envp;
* {
* int dummy;
*
* GC_stackbottom = (ptr_t)(&dummy);
* return(real_main(argc, argv, envp));
* }
*
*
* Each architecture may also define the style of virtual dirty bit
* implementation to be used:
* MPROTECT_VDB: Write protect the heap and catch faults.
* PROC_VDB: Use the SVR4 /proc primitives to read dirty bits.
*/
# ifdef M88K
# define MACH_TYPE "M88K"
# define ALIGNMENT 4
# define DATASTART ((char*)0x410000)
# define STACKBOTTOM ((char*)0xf0000000)
# endif
# ifdef M68K
# define MACH_TYPE "M68K"
# define ALIGNMENT 2
# ifdef SUNOS
# define OS_TYPE "SUNOS"
extern char etext;
# define DATASTART ((ptr_t)((((word) (&etext)) + 0x1ffff) & ~0x1ffff))
# define HEURISTIC1 /* differs */
# 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. */
# 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 */
# endif
# endif
# ifdef VAX
# define MACH_TYPE "VAX"
# define ALIGNMENT 4 /* Pointers are longword aligned by 4.2 C compiler */
extern char etext;
# define DATASTART ((ptr_t)(&etext))
# ifdef BSD
# define OS_TYPE "BSD"
# define HEURISTIC1
/* HEURISTIC2 may be OK, but it's hard to test. */
# endif
# ifdef ULTRIX
# define OS_TYPE "ULTRIX"
# define STACKBOTTOM ((ptr_t) 0x7fffc800)
# endif
# endif
# ifdef RT
# define MACH_TYPE "RT"
# define ALIGNMENT 4
# define DATASTART ((ptr_t) 0x10000000)
# define STACKBOTTOM ((ptr_t) 0x1fffd800)
# endif
# ifdef SPARC
# define MACH_TYPE "SPARC"
# define ALIGNMENT 4 /* Required by hardware */
extern int etext;
# ifdef SUNOS5
# define OS_TYPE "SUNOS5"
# define DATASTART ((ptr_t)((((word) (&etext)) + 0x10003) & ~0x3))
/* Experimentally determined. */
/* Inconsistent with man a.out, which appears */
/* to be wrong. */
# define PROC_VDB
# endif
# ifdef SUNOS4
# define OS_TYPE "SUNOS4"
# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
/* On very old SPARCs this is too conservative. */
# define MPROTECT_VDB
# endif
# define HEURISTIC1
# endif
# ifdef I386
# define MACH_TYPE "I386"
# define ALIGNMENT 4 /* 32-bit compilers align pointers */
# ifdef SEQUENT
# define OS_TYPE "SEQUENT"
extern int etext;
# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
# define STACKBOTTOM ((ptr_t) 0x3ffff000)
# endif
# ifdef SUNOS5
# define OS_TYPE "SUNOS5"
extern int etext;
# define DATASTART ((ptr_t)((((word) (&etext)) + 0x1003) & ~0x3))
extern int _start();
# define STACKBOTTOM ((ptr_t)(&_start))
# define PROC_VDB
# endif
# ifdef SCO
# define OS_TYPE "SCO"
# define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \
& ~0x3fffff) \
+((word)&etext & 0xfff))
# define STACKBOTTOM ((ptr_t) 0x7ffffffc)
# endif
# ifdef LINUX
# define OS_TYPE "LINUX"
extern int etext;
# define DATASTART ((ptr_t)((((word) (&etext)) + 0xfff) & ~0xfff))
# define STACKBOTTOM ((ptr_t)0xc0000000)
# endif
# ifdef OS2
# define OS_TYPE "OS2"
# define DATASTART ((ptr_t)((((word) (&etext)) + 0x3fffff) \
& ~0x3fffff) \
+((word)&etext & 0xfff))
/* STACKBOTTOM is handled specially in GC_init_inner. */
/* OS2 actually has the right system call! */
# endif
# endif
# ifdef NS32K
# define MACH_TYPE "NS32K"
# define ALIGNMENT 4
extern char **environ;
# define DATASTART ((ptr_t)(&environ))
/* hideous kludge: environ is the first */
/* word in crt0.o, and delimits the start */
/* of the data segment, no matter which */
/* ld options were passed through. */
# define STACKBOTTOM ((ptr_t) 0xfffff000) /* for Encore */
# endif
# ifdef MIPS
# define MACH_TYPE "MIPS"
# define ALIGNMENT 4 /* Required by hardware */
# define DATASTART 0x10000000
/* Could probably be slightly higher since */
/* startup code allocates lots of junk */
# define HEURISTIC2
# ifdef ULTRIX
# define OS_TYPE "ULTRIX"
# endif
# ifdef RISCOS
# define OS_TYPE "RISCOS"
# endif
# ifdef IRIX5
# define OS_TYPE "IRIX5"
# define MPROTECT_VDB
# endif
# endif
# ifdef RS6000
# define MACH_TYPE "RS6000"
# define ALIGNMENT 4
# define DATASTART ((ptr_t)0x20000000)
# define STACKBOTTOM ((ptr_t)0x2ff80000)
# endif
# ifdef HP_PA
# define MACH_TYPE "HP_PA"
# define ALIGNMENT 4
extern int __data_start;
# define DATASTART ((ptr_t)(&__data_start))
# define HEURISTIC2
# define STACK_GROWS_UP
# endif
# ifdef ALPHA
# define MACH_TYPE "ALPHA"
# define ALIGNMENT 8
# define DATASTART ((ptr_t) 0x140000000)
# define HEURISTIC2
# define CPP_WORDSZ 64
# define MPROTECT_VDB
# endif
# ifdef NeXT
# define MACH_TYPE "M68K"
# define ALIGNMENT 2
# define BSD
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 HEURISTIC1 /* differs */
# 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
# if CPP_WORDSZ != 32 && CPP_WORDSZ != 64
-> bad word size
# endif
# ifdef PCR
# undef STACKBOTTOM
# undef HEURISTIC1
# undef HEURISTIC2
# undef PROC_VDB
# undef MPROTECT_VDB
# define PCR_VDB
# endif
# if !defined(PCR_VDB) && !defined(PROC_VDB) && !defined(MPROTECT_VDB)
# define DEFAULT_VDB
# endif
# endif
These are the contents of the former NiCE NeXT User Group NeXTSTEP/OpenStep software archive, currently hosted by Netfuture.ch.