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Text File | 1996-08-18 | 23.1 KB | 565 lines

============ VERSION 44.0 ============ Kriton Kyrimis updated ixprefs. David Zaroski updated ixtrace. Fixed link count for directories. Thanks to Norbert Pueschel. umask implemented for for open() and mkdir(). Thanks to Norbert Pueschel. Added muFIBB_SET_GID, which will be implemented in the next version of MultiUser. The old way of handling setgid was confusing and even potentially dangerous. Thanks to Norbert Pueschel. Added the translation unix sticky bit -> AmigaDOS h bit. This one is more for aestaethical reasons, as the h bit is no longer supported in 3.x. Thanks to Norbert Pueschel. Added a field 'void *u_user;' near the beginning of the user struct which everybody is free to (ab)use. It can be handy to store task private data in the user struct, at least, I had to use it recently. Added an ix_amiga.h header, which will contain all amiga specific functions and macros in ixemul.library and libc.a, together with a description. Profiling has been enhanced. Ixprefs adds a new profiling preference: either take samples only while your program is running and the PC is within your program, or take samples while your program is running and if the PC is outside your program code (e.g. in ixemul or in intuition.library), use the last function your program entered before calling ixemul or whatever, or always take samples, even if other programs are running. Again, the last recorded function gets the hit in those cases. An array of 100 longs to store the A4 register of shared libraries has been added to the user struct. This array can be easily increased in future releases, should the need arise. The first 20 slots are for your own free use, the other slots should be registered. See the file REGISTRY in the ixemul source distribution for more details. Fixed yet another path bug. Running a shell script that's placed somewhere in your PATH from 'make' failed, unless the filename of the script was absolute. Added vfork_setup_child to libc.a. This is a wrapper intended to make life just a little bit easier for those who need to use the vfork2()/vfork_resume() trick. It replaces the old 'ix_resident()/ix_get_vars2()' pair. Fixed more problems with the routines that start a shell script. This time problems with symbolic links have been fixed. Fixed problems when parsing a pathname of a shell script, preventing the execution of that script. Replaced the stdio-sources by the NetBSD 44.0 versions, which incidentally fixed the broken fgetpos function. This change also adds printf() and scanf() support for the 'long long' datatype. Added support for the O_CASE open() flag: this will open an existing file only if the filenames match using a case-sensitive comparison. fstat() didn't compensate the file time for the current timezone offset. Ixemul now supports the 68010 CPU. Thanks to Pascal Eeftinck for pointing out that the 68010 uses a 68020-like stackframe. Build the version.[ch] files in the build directory instead of in the source directory. Fixed fchdir(). Changed the machine name as returned by uname() to "m68k". Thanks to Lars Hecking for this. O_ASYNC I/O is now partially supported: select() will test for this situation. /dev/tty is now translated to console:. Implemented pseudo-terminals support using the FIFO device. Many, mostly small, changes to become more NetBSD compatible. Where possible, I've replaced the old sources with the NetBSD 1.1 sources. The select() function has been improved: it is now much faster and works much better. Using F_SETFL with fcntl() failed if the file wasn't a regular file. It now also works for pipes and sockets. Requesters that are from ixemul.library or ixnet.library now have the name of the library as their title, so that you can see that they are from the library, and not from the application. Thanks to Udo Schnurpfeil for suggesting this. The tty database functions unfortunately slipped through and weren't included with 43.1. They are back in 44.0. Implemented mmap() and friends. Of course, any mmap feature that actually requires a MMU will return an error. But if mmap() is used to load a file into memory, then it works fine. ============ VERSION 43.2 ============ Applied patch from Kamil Iskra to improve ixemul stack extension handling. ============ VERSION 43.1 ============ Ixemul no longer uses async writes. All I/O is now synchronous. This allowed me to remove several Disable()/Enable() pairs, and actually made ixemul faster. Apparently the overhead in handling async I/O was substantial. Applied patches from Jeff Shepherd fixing various problems in the ixnet.library. Among them improved AS225 passwd handling. Moved the resolver functions out of ixnet.library into libc.a. All programs that used these functions will have to be recompiled. Very few programs use these functions, and since they are really higher level functions and do not belong in a low level library like ixnet, I've moved them. Also moved tty database functions (getttyent() and friends, ttyname() and ttyslot()) to libc.a, for much the same reason. Added the NetBSD DB sources to libc.a and removed the hacked versions from ixnet. Replaced various headers with the NetBSD versions. Important for certain socket-related ioctl defines that were incorrect in the old headers. Added ptrace(GETA4, pid, 0, 0) to obtain the value of the a4 register if this executable was compiled with -fbaserel or -resident. Needed by gdb to find out where the data section is. Added ptrace(GETEXENAME, pid, 0, 0) to obtain the name of the current executable. Useful in scripts that start with '#!/bin/sh' or something similar. 'argv[0]' as seen by sh is the name of the script, but if you want to get the pathname of 'sh' itself, you can use this ptrace call. Added setlocale() and ctermid() to libc.a. It is now possible to unlink() a file that is owned by another process (just like Unix). Gcc uses this to remove temporary files that are actually owned by cpp (or as). Of course, on the Amiga this is implemented as a delayed delete, i.e. a flag is set in the 'struct file' to tell ixemul to delete the file when it is closed by the owner process. Added support for a root ('/') directory. This will only work for programs that use ixemul.library. So if you start pdksh, 'cd' to the root (cd /) and use the AmigaDOS command 'list' to view this directory, then you won't get what you expect. If you use the Unix ls command however, then you will see all the volumes that you have as top level directories. Removed an old hack in __wait_packet.c that interfered with Ctrl-F handling. Fixed a bug in fnctl(), F_SETFL. Added AFS, AFSFloppy and PFS support. Many thanks to the AFS author, Michiel Pelt, who provided me with the necessary technical information, and to Kriton Kyrimis for giving some very useful suggestions. Added MultiUserFileSystem support, contributed by Mike Krings. Thanks Mike! Added new function ix_warning: similar to ix_panic, but allows the user to choose between "Continue" and "Abort". This to work around a case like: for (;;) crypt(); where one couldn't break out of the program because the requester kept popping up. Fixed -mstackcheck support and fixed buggy baserel-stackextend support. The call socket(AF_UNIX, SOCK_STREAM, 0) no longer crashes if ixnet.library is not installed. Reorganized Makefiles. I've removed the option to compile each source separately, instead they are always catenated together. Also, 'make' no longer starts itself two more times in order to make the library. I've used GNU make wizardry to let 'make' figure out all the targets by itself. Sigsetjmp and siglongjmp were broken. Fixed. Replaced the old man pages with the new NetBSD manual pages in the original troff form. Replaced the nice() stub in ix_stub with nice.c from NetBSD. Removed a Delay(100) that was called just before a vfork()ed program finally terminated. Made h_errno a global variable like errno. At several places in the library the errno variable was reset to 0. However, the library should (almost) never set errno to 0. This caused problems with the 'ping' program, where recvfrom set errno to 4, but the library changed it back to 0 before 'ping' got to see it. Now sets st_uid and st_gid from a 'stat' structure to the effective UID and GID. Some programs tested these fields and they failed when using networking support. These fields used to be 0. Reread the global environment variables only when 1) a new program is started, and 2) the ENV: directory has been changed (i.e., a new setting was added to ENV:). ENV: used to be read every time a program was started, whether it was needed or not. Given the shell script s.sh in /ram/t: #!/bin/sh /bin/echo $0 'sh /ram/t/s.sh' produced '/ram/t/s.sh', while typing '/ram/t/s.sh' from within the pdksh shell produced 'Ram:t/s.sh'. Fixed. Removed a dubious CurrentDir() to a *file* instead of a directory. While this is apparently supported for the standard AmigaOS filesystems, not all third-party filesystems supported this. When you try to use a >68020 ixemul.library on a 68000 Amiga, you now get a decent message instead of a crash. ============ VERSION 43.0 ============ Integrated Jeff Shepherd's networking code. If ixnet.library is installed, then ixemul.library will use the networking functions from the ixnet.library, instead of the default dummy implementation. Ixnet.library works with AS225 and with AmiTCP. It supports both clients and daemons. A program that uses networking functions is completely shielded from the AS225 and AmiTCP differences by ixnet.library. That library will take care of all the details for you. That means that there is no longer any need to provide two different binaries, one for AS225 and one for AmiTCP. Furthermore, it is relatively easy to add support for other network packages. Thanks, Jeff! Added stackchecking and extension code, thanks to Matthias Fleischer. Finalized GDB support. ============ VERSION 42.1 ============ Fixed bugs when running non-ixemul programs from tools like pdksh or make. You could get Enforcer hits and the Ctrl-C support also crashed the Amiga. Use the NetBSD code for the system() function instead of using the Amiga kernel function SystemTagList. This was the cause of several incompatibilities when porting Unix programs. Improved termios support (added OPORT and ONLCR flags and the INLCR flag). Fixed ptrace handling. Almost none of Leonard's code has survived, I used a completely different method. Fixed a problem where the name of the current directory, as is visible by the shell, wasn't changed when a program terminated and ixemul reset the current directory to its original place. Improved performance somewhat by no longer going through address 4 to get to the ExecBase structure. Instead, it's copied once to the SysBase variable, and thereafter only that variable is used. The Enforcer manual warned against accessing address 4 too often, and ixemul.library did that a lot. Also improved performance by fixing a busy wait. At one point in the ixemul, the program cannot continue until a context switch has taken place. So ixemul waits until the dispatch count of ExecBase has changed, indicating that a context switch has taken place. By installing a small, high priority (9) task with body "for (;;) Wait(1 << 31);" and signalling that task whenever a context switch is needed, I was able to circumvent the busy wait loop. Because of the high priority of the Task, a context switch would take place immediately. The task itself goes back to sleep at once, so there is no time lost there. ============ VERSION 42.0 ============ Installed patch in arith.c to work around bug in IEEEDPCmp. If the first 32 bits of both doubles are equal, and both doubles are negative, then the result can no longer be trusted. Discovered by Bart Van Assche. Ixtrace has been updated to recognize all 42.0 syscalls, thanks to David Zaroski. Ctrl-C handling worked with KingCON, but not with the standard AmigaDOS CON-handler (since I use KingCON I never noticed this until it was pointed out to me by Fred Fish :-). This has now been fixed. See the comments in library/__read.c for more information. Added the uname() function, written by Lars Hecking. The termios code now properly recognizes the ICRNL input flag for '\r' to '\n' translation. Fixed a bug in the fcntl() function (actually, in the fcntl.h and sys/fcntl.h headers). Moved several static variables to user.h, so they are now process-specific. Added profiling support. It was always there, but it was never actually used. The write() function writes its buffer line-by-line instead of in one big chunk if the filehandle is the handle of an interactive stream (for example, a console window). This allows the user to interrupt the output by pressing a key and it also allows the use of Ctrl-C to break the program. In previous versions you were unable to stop the output if you forgot to redirect it to a file. E.g., 'cat /libs/ixemul.library' would essentially take over the computer. Changed default stack size handling when a new process is launched. It is either the value of the environment variable IXSTACK, or it inherits the size from its parent, but if that size is less than 16384, it uses a stack of 16384 bytes instead. Replaced ixconfig by ixprefs (written by Kriton Kyrimis). Integrated the partial ptrace support from Leonard Norrgard. Removed the gnulib, gnulib-68881 and gnulib-soft-float directories. Compiled with -Wall and fixed (nearly) all warnings. Some warnings are inevitable and cannot be avoided. -Wall already caught one illegal memory access bug in __Close()! Added functions to set and get ixemulbase-private information. This will break older ixconfig's but is much cleaner. Nearly all of the ixemulbase structure is now off-limits and liable to change without notice! You are warned! In fact, the structure has been changed already. The library will complain if a program called 'ixconfig' tries to use it to prevent the user from using an old ixconfig with the new library. Removed several arithmetic functions dealing with 'long long' types. They didn't belong in the library, link with libgcc.a instead. Also removed some arithmetic functions that are never called because they are compiled directly in 68000 assembly. Don't know why they were ever added. Fixed gen_glue.c so that it no longer generates glue for obsolete functions. Removed ssystem(). ssystem() was the precursor of vfork/execve, and is no longer needed. NOTE: it is still used in gcc. But this fails spectacularly once you use Ctrl-C! Delete gcc and replace it by gccv, this one uses vfork/execve as it should and works perfectly. ixemul.library now uses the new-style inlines. qsort() is now re-entrant and no longer uses the horrible Semaphore hack. Moved general/fts.c to the static library. These directory-tree traversal functions are rarely, if ever used, so they belong in libc.a and not in a shared library. Reorganized the Makefiles. The makefiles now use several GNU make-only features to make them smaller and easier to maintain. 'make clean' and 'make clobber' now work correctly. It is also no longer nessecary to add the -srcdir option to 'sh configure' in order to create valid Makefiles. The top level Makefile contains the line 'export CATENATE = 1'. If this line is present, the compilation speed is greatly improved by catenating several small C-sources together into one bigger C-source, and then the bigger one is compiled. By commenting this line each separate source is compiled. Note that besides improving compilation speed, the library also gets smaller as the compiler can now determine whether a call can be made relative or should remain absolute. Fixed a symlink-bug (ln -s /ram/t created a symlink to /am/t, removing the first character of the volumename). Moved ixtrace to the new utils directory, together with the small ixrun utility. ixrun can be used to run Amiga batch files from /bin/sh (just put ';!ixrun' at the second line (!) of the batch file). Also added manual page for ixrun. Cleaned up the static directory: removed xmalloc.c and alloca.c as they do not belong in the standard C library. Also replaced the ctime.c source by the version from elsie.nci.nih.gov, which is the official version used by NetBSD and Linux, among others. Finally, errlst.c and siglist.c now just include their counterparts in the general directory. The version information is placed in the version.in file in the top-level directory. The version.c and version.h sources are created from this file. The print_base_size.c and print_user.c sources have been replaced by create_header.c, which creates a header containing a few defines that are used by start.s and trap.s. These used to be hard-coded, but now they are generated, preventing future mistakes. Added the raise function. For some reason, raise.c was never compiled into the library. It is now. Removed ALL sources that were not needed for compilation. Added timezone handling. The timezone databases from elsie.nci.nih.gov are used and installed in etc:zoneinfo. The new ixtimezone utility should be added to the startup-sequence. This utility determines the correct offset for Greenwich Mean Time. Read the manual page (Yes! Documentation at last!) for more information. Merged the ixpipe-handler into the ixemul-distribution. It has been placed in the utils-directory. Added hack to allow ixemul to run AmigaDOS scripts without breaking them when run from the AmigaDOS shell. The problem is that the ".KEY" string must be at the first line of the script, while ixemul also looks for "#!" and ";!" in the first line. If a file starts with ".KEY", ixemul will now skip the first line, before checking for "#!" and ";!". ============ VERSION 41.4 ============ Integrated patches from Hans Verkuil that fix CTRL-C handling, fix another signal bug, fix problem with "rm -f", prepare for proper timezone handling, and remove '@' hack in argument parsing. Applied patch from Kamil Iskra to avoid incompatibility between ixemul and the popular KingCON 1.3. This is KingCON's fault because it makes invalid assumptions about the nature of reply port contained in "dp_Port" of packets sent to it. Also applied patch (duplicated in Hans' patches) to crt0.c that fixes bug where the revision requester was not working properly if the current revision is 0. Applied patch from Rask Lambertsen (duplicated in Hans' patches) that makes ixemul.library open "CONSOLE:" instead of "*". Added implementation from Kriton Kyrimis for srand48, seed48, lcong48, lrand48, nrand48, mrand48, jrand48, drand48, and erand48. Added "#include <sys/types.h>" to <dirent.h> to be more compatible with most current systems that do this inclusion for you. This change should be backwards compatible with code that does the inclusion explicitly. Suggested by Lars Hecking. Changed prototype in <unistd.h> for getpgrp() to take a pid_t argument, which matches the implementation in library/getcrap.c. Suggested by Lars Hecking. Made change to <math-68881.h> in pow() so that if x<0 the code does log(-x) rather than log(x). Suggested by Thomas Radtke and implemented by Lars Hecking. Disable definitions of F_GETLK, F_SETLK, F_SETLKW, F_RDLCK, F_UNLCK, and F_WRLCK in <fcntl.h> since they are unimplemented and thus might have misled autoconfiguration schemes into thinking they were available. Also fix ixtrace.c so it will still compile without these defined. Suggested by Robert Ramiega. Integrated patch from Joop van de Wege (duplicated in Hans' patches) for setting up fpu on 68060. ============ VERSION 41.3 ============ Updated DBL_MIN and DBL_MAX in float.h to include one additional digit of precision. Enclose negative constants in parens to avoid unexpected conversion to subtraction via cpp macros. Applied patch from Hans Verkuil to fix serious bug in signal handling, to reset all signal handlers after an execve, except for those which are being ignored (SIG_IGN). Applied patch from Joop van de Wege to trap.s to set 68881 rounding mode back to truncation instead of "round to nearest", as required by the ANSI C standard which specifies truncation. Integrated ixtrace into source tree and arranged for it to be built and installed. ============ VERSION 41.2 ============ Added "#include <sys/types.h>" to <sys/stat.h> to be more compatible with most current systems that do this inclusion for you. This change should be backwards compatible with code that does the inclusion explicitly. Changed version string to be style guide compliant. Also arranged that version.o gets linked in, since it has the $VER: string and is otherwise unreferenced by any ixemul.library code. Merged patches from Hans Verkuil to fix execve environment passing, always open the console for stderr if no other file handle is provided, move AmigaDOS style filename matching into glob(), and fix a small problem with "open(NULL,...) that caused enforcer hits. ============ VERSION 41.1 ============ A 68040 version of the library with soft floating point is now built, since there are apparently systems that use the versions of the 68040 without FPUs. Fixed crt0 files to use "jra _ENTRY" as first instruction rather than "jmp pc@(_ENTRY)" which was getting assembled by gas 2.5.2 as a 68020+ instruction. Note "jmp pc@(_ENTRY:W)" seems to generate the 68000 instruction but a bad jump offset. Added corresponding change to execve.c to recognize ixemul using executables with this change. Fixed cpu.h, machdep.c, trap.s to avoid pc relative assembly instruction that was getting compiled as 68020+ instruction and causing crashes on 68000 machines. Fixed numerous files that did "#include" of "DEFS.H" rather than "defs.h". This is an innocuous bug on the Amiga, which is case independent, but it kills cross compilations. ============ VERSION 41.0 ============ No significant changes since the 40.6 beta release other than the mechanism (and macros) for building debug versions has been cleaned up and the version number has been bumped to 41.0. Did include the cat'able man pages back in the source tree, but no work has been done yet to track down the sources for the man pages and arrange for them to be properly integrated into the tree and have the cat'able versions generated from those sources. ============ VERSION 40.6 ============ Many bugs have been fixed since the 40.4 release, including a serious one that was causing memory corruption and many enforcer or mungwall hits. Network support has been reintegrated into the library, however it is still mostly untested. In particular, many functions are only available for static linking from the libnet.a library. By the next release, it is expected that libnet.a will be incorporated in libc.a. Work is underway to merge the best features from at least two different strains of the ixemul library. Many more changes are expected by the 41.0 release. An environment variable called "IXSTACK" is now used to control the stack size of programs started by system(). If the current stack is smaller than the value in IXSTACK, the stack is raised to the value specified in IXSTACK. So IXSTACK is a minimum value. Automatic stack checking, with a requestor if the stack overflows, is available for executables compiled with a version of gcc that supports the -mstackcheck option. This also requires linking with new crt0 and libc.a. Automatic stack extension as necessary is available for executables compiled with a version of gcc that supports the -mstackextend option. This also requires linking with new crt0 and libc.a.