176 lines
5.3 KiB
Plaintext
176 lines
5.3 KiB
Plaintext
diff -bcrN gc.org/doc/README.ews4800 gc/doc/README.ews4800
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*** gc.org/doc/README.ews4800 Thu Jan 1 09:00:00 1970
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--- gc/doc/README.ews4800 Wed Jul 25 17:38:57 2001
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***************
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*** 0 ****
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--- 1,75 ----
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+ GC on EWS4800
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+ -------------
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+
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+ 1. About EWS4800
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+ EWS4800 is 32bit/64bit workstation.
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+
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+ Vender: NEC Corporation
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+ OS: UX/4800 R9.* - R13.* (SystemV R4.2)
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+ CPU: R4000, R4400, R10000 (MIPS)
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+
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+ 2. Compiler
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+
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+ 32bit:
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+ Use ANSI C compiler.
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+ CC = /usr/abiccs/bin/cc
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+
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+ 64bit:
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+ Use 64bit ANSI C compiler.
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+ CC = /usr/ccs64/bin/cc
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+ AR = /usr/ccs64/bin/ar
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+
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+ 3. ELF file format
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+ *** Caution: The following infomation is empirical. ***
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+
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+ 32bit:
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+ ELF file has an unique format. (See a.out(4) and end(3C).)
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+
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+ &_start
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+ : text segment
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+ &etext
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+ DATASTART
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+ : data segment (initialized)
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+ &edata
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+ DATASTART2
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+ : data segment (uninitialized)
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+ &end
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+
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+ Here, DATASTART and DATASTART2 are macros of GC, and are defined as
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+ the following equations. (See include/private/gcconfig.h.)
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+ The algorithm for DATASTART is similar with the function
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+ GC_SysVGetDataStart() in os_dep.c.
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+
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+ DATASTART = ((&etext + 0x3ffff) & ~0x3ffff) + (&etext & 0xffff)
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+
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+ Dynamically linked:
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+ DATASTART2 = (&_gp + 0x8000 + 0x3ffff) & ~0x3ffff
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+
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+ Statically linked:
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+ DATASTART2 = &edata
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+
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+ GC has to check addresses both between DATASTART and &edata, and
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+ between DATASTART2 and &end. If a program accesses between &etext
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+ and DATASTART, or between &edata and DATASTART2, the segmentation
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+ error occurs and the program stops.
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+
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+ If a program is statically linked, there is not a gap between
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+ &edata and DATASTART2. The global symbol &_DYNAMIC_LINKING is used
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+ for the detection.
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+
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+ 64bit:
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+ ELF file has a simple format. (See end(3C).)
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+
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+ _ftext
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+ : text segment
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+ _etext
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+ _fdata = DATASTART
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+ : data segment (initialized)
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+ _edata
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+ _fbss
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+ : data segment (uninitialized)
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+ _end = DATAEND
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+
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+ --
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+ Hironori SAKAMOTO <hsaka@mth.biglobe.ne.jp>
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+
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diff -bcrN gc.org/include/private/gcconfig.h gc/include/private/gcconfig.h
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*** gc.org/include/private/gcconfig.h Sun Jul 1 06:29:27 2001
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--- gc/include/private/gcconfig.h Wed Jul 25 17:38:57 2001
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***************
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*** 75,83 ****
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# endif
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# define mach_type_known
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# endif
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! # if defined(mips) || defined(__mips)
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# define MIPS
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! # if !defined(LINUX)
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# if defined(ultrix) || defined(__ultrix) || defined(__NetBSD__)
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# define ULTRIX
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# else
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--- 75,86 ----
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# endif
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# define mach_type_known
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# endif
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! # if defined(mips) || defined(__mips) || defined(_mips)
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# define MIPS
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! # if defined(nec_ews) || defined(_nec_ews)
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! # define EWS4800
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! # endif
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! # if !defined(LINUX) && !defined(EWS4800)
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# if defined(ultrix) || defined(__ultrix) || defined(__NetBSD__)
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# define ULTRIX
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# else
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***************
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*** 1083,1088 ****
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--- 1086,1114 ----
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/* instead. But some kernel versions seem to give the wrong */
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/* value from /proc. */
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# endif /* Linux */
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+ # ifdef EWS4800
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+ # define HEURISTIC2
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+ # if defined(_MIPS_SZPTR) && (_MIPS_SZPTR == 64)
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+ extern int _fdata[], _end[];
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+ # define DATASTART ((ptr_t)_fdata)
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+ # define DATAEND ((ptr_t)_end)
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+ # define CPP_WORDSZ _MIPS_SZPTR
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+ # define ALIGNMENT (_MIPS_SZPTR/8)
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+ # else
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+ extern int etext, edata, end;
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+ extern int _DYNAMIC_LINKING, _gp;
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+ # define DATASTART ((ptr_t)((((word)&etext + 0x3ffff) & ~0x3ffff) \
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+ + ((word)&etext & 0xffff)))
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+ # define DATAEND (&edata)
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+ # define DATASTART2 (&_DYNAMIC_LINKING \
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+ ? (ptr_t)(((word)&_gp + 0x8000 + 0x3ffff) & ~0x3ffff) \
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+ : (ptr_t)&edata)
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+ # define DATAEND2 (&end)
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+ # define ALIGNMENT 4
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+ # endif
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+ # define OS_TYPE "EWS4800"
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+ # define USE_GENERIC_PUSH_REGS 1
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+ # endif
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# ifdef ULTRIX
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# define HEURISTIC2
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# define DATASTART (ptr_t)0x10000000
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diff -bcrN gc.org/mach_dep.c gc/mach_dep.c
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*** gc.org/mach_dep.c Thu Jun 28 05:54:23 2001
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--- gc/mach_dep.c Wed Jul 25 17:38:57 2001
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***************
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*** 429,435 ****
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*i = 0;
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}
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# if defined(POWERPC) || defined(MSWIN32) || defined(MSWINCE) \
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! || defined(UTS4) || defined(LINUX)
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(void) setjmp(regs);
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# else
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(void) _setjmp(regs);
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--- 429,435 ----
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*i = 0;
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}
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# if defined(POWERPC) || defined(MSWIN32) || defined(MSWINCE) \
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! || defined(UTS4) || defined(LINUX) || defined(EWS4800)
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(void) setjmp(regs);
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# else
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(void) _setjmp(regs);
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diff -bcrN gc.org/os_dep.c gc/os_dep.c
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*** gc.org/os_dep.c Tue Jun 26 11:32:26 2001
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--- gc/os_dep.c Wed Jul 25 17:38:57 2001
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***************
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*** 1088,1093 ****
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--- 1088,1096 ----
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GC_add_roots_inner(DATASTART, (char *)sbrk(0), FALSE);
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# else
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GC_add_roots_inner(DATASTART, (char *)(DATAEND), FALSE);
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+ # if defined(DATASTART2)
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+ GC_add_roots_inner(DATASTART2, (char *)(DATAEND2), FALSE);
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+ # endif
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# endif
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# endif
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# if !defined(PCR) && (defined(NEXT) || defined(MACOSX))
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