blackbox-linux-console/README

Oberon Microsystems BlackBox Component Builder (http://www.oberon.ch/)
Port for OpenBSD/i386, Linux/i386

Some significant parts taken from OpenBUGS (http://www.openbugs.info/)

How to build:
	compile loader executable (BlackBox itself and simple interpreter):
		`uname -s`/libBB*.so must be present (can be built from Windows)

		cd BlackBox/`uname -s`/Lin/Rsrc/loader; make

	compile self:

		cd BlackBox; ./switch-os `uname -s`; ./clean; ./build-lindev; ./build

Files:
	original:
		BlackBox:
			Dev/Mod/*
				all except ElfLinker16
			Dev/Rsrc/*
			Docu/BB-License.odc
			Docu/BB-Licensing-Policy.odc
			Docu/BB-Open-Source-License.odc
			Obx/*
			Std/*
			System/Mod/
				all except Console
			System/Rsrc/*
			Text/*
		OpenBUGS:
			Dev/Mod/ElfLinker16.odc
			Dev/Docu/ElfLinker.odc
			System/Mod/Console.odc
			Docu/OpenBUGS-License.odc
		http://forum.oberoncore.ru/viewtopic.php?f=34&t=1159&sid=3e82517160caa46c64331178c1b61e95:
			{Linux,OpenBSD}/Lin/Mod/Kernel_so_init.odc
	modified:
		OpenBSD/Lin/Mod/Kernel.odc:
			1.6-rc6 System/Mod/Kernel.odc, OpenBUGS Lin/Mod/linKernel.odc:
				OpenBSD specific:
					Memory management rewritten (based on mmap)
					Kernel.TrapHandler
						OpenBSD sigcontext-specific
					Kernel.Time
						CLOCKS_PER_SEC related
					Kernel.InitModule
						mprotect call added
					Kernel.InstallSignals:
						use alternate stack on which signals are to be processed (to catch stack overflow)
						do not install signal handler for SIGTHR (when executable linked with -pthread)
				Kernel.cmdLine support:
					Kernel.INIT (SetCmdLine2)
		Linux/Lin/Mod/Kernel.odc:
			OpenBSD/Lin/Mod/Kernel.odc modified for Linux:
				Time*
				TrapHandler
				mmap: use "/dev/zero" device instead of -1
				mprotect addresses must be page-aligned
				do not show warning message if signal install failed
				sigStkSize increased, because SIGSTKSZ=8192 on Linux is too low
		OpenBSD/Lin/Mod/linHostFiles.odc:
			OpenBUGS Lin/Mod/linHostFiles.odc:
				OpenBSD-specific:
					size_t
					__xstat -> stat
				Kernel.cmdLine support:
					str := "" -> str := Kernel.cmdLine$
		Linux/Lin/Mod/linHostFiles.odc:
			OpenBUGS Lin/Mod/linHostFiles.odc:
				Kernel.cmdLine support:
					str := "" -> str := Kernel.cmdLine$
		OpenBSD/Lin/Mod/Console.odc:
			OpenBUGS Lin/Mod/Console.odc:
				stdin -> SYSTEM.ADR(__sF[0])
		Linux/Lin/Mod/Console.odc:
			OpenBUGS Lin/Mod/Console.odc
		OpenBSD/Lin/Mod/Libc.txt:
			OpenBUGS Lin/Mod/Libc.odc:
				OpenBSD-specific
		Linux/Lin/Mod/Libc.odc:
			OpenBUGS Lin/Mod/Libc.odc:
				PROT_*, MAP_*, O_*, _SC_PAGESIZE, SIGSTKSZ CONSTs added
				open, close, read, write, mmap, munmap, mprotect, getenv, sysconf, sigaltstack functions added
		Linux/Lin/Mod/Dl.odc:
			OpenBUGS Lin/Mod/Dl.odc
		OpenBSD/Lin/Mod/Dates.odc:
			HostDates, from http://oberoncore.ru/:
				OpenBSD-specific
		Linux/Lin/Mod/Dates.odc:
			HostDates, from http://oberoncore.ru/
		Lindev/Mod
			CP*
				BlackBox 1.6-rc6 Dev CP* modified to not depend on Dates, Texts etc.
			Compiler.odc:
				modified original BlackBox Dev/Mod/Compiler.odc
			ElfLinker16.odc:
				modified OpenBUGS Dev/Mod/ElfLinker16.odc
	new:
		Cons/Mod
			Interp.odc: console interpreter
			Compiler.odc: console interface to Dev compiler

		{OpenBSD,Linux}/libBB.so: compiled and linked shared library to run BlackBox
		{OpenBSD,Linux}/libBB0.so: compiled and linked shared library to run simple development interpreter

		Views.odc: minimal Views implementation required to compile StdInterpreter
		StdLog.odc: alternative StdLog implementation to not depend on GUI
		HostFonts.odc, HostDialog.odc, HostWindows.odc: simple Hosts implementation

Notes:
	Lindev:
		I will not remove Lindev because I can not link .so library based on ConsInterp and Dev
	Kernel_so_init.SetKernelBaseStack:
		required only in case of .so shared library dynamic loading
			(at run-time via dlopen, not on link-time)

A. V. Shiryaev, 2012