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