Commit Graph

72 Commits

Author SHA1 Message Date
peter
c5f6ba6bb4 Mega-commit for Linux emulator update.. This has been stress tested under
netscape-2.0 for Linux running all the Java stuff.  The scrollbars are now
working, at least on my machine. (whew! :-)

I'm uncomfortable with the size of this commit, but it's too
inter-dependant to easily seperate out.

The main changes:

COMPAT_LINUX is *GONE*.  Most of the code has been moved out of the i386
machine dependent section into the linux emulator itself.  The int 0x80
syscall code was almost identical to the lcall 7,0 code and a minor tweak
allows them to both be used with the same C code.  All kernels can now
just modload the lkm and it'll DTRT without having to rebuild the kernel
first.  Like IBCS2, you can statically compile it in with "options LINUX".

A pile of new syscalls implemented, including getdents(), llseek(),
readv(), writev(), msync(), personality().  The Linux-ELF libraries want
to use some of these.

linux_select() now obeys Linux semantics, ie: returns the time remaining
of the timeout value rather than leaving it the original value.

Quite a few bugs removed, including incorrect arguments being used in
syscalls..  eg:  mixups between passing the sigset as an int, vs passing
it as a pointer and doing a copyin(), missing return values, unhandled
cases, SIOC* ioctls, etc.

The build for the code has changed.  i386/conf/files now knows how
to build linux_genassym and generate linux_assym.h on the fly.

Supporting changes elsewhere in the kernel:

The user-mode signal trampoline has moved from the U area to immediately
below the top of the stack (below PS_STRINGS).  This allows the different
binary emulations to have their own signal trampoline code (which gets rid
of the hardwired syscall 103 (sigreturn on BSD, syslog on Linux)) and so
that the emulator can provide the exact "struct sigcontext *" argument to
the program's signal handlers.

The sigstack's "ss_flags" now uses SS_DISABLE and SS_ONSTACK flags, which
have the same values as the re-used SA_DISABLE and SA_ONSTACK which are
intended for sigaction only.  This enables the support of a SA_RESETHAND
flag to sigaction to implement the gross SYSV and Linux SA_ONESHOT signal
semantics where the signal handler is reset when it's triggered.

makesyscalls.sh no longer appends the struct sysentvec on the end of the
generated init_sysent.c code.  It's a lot saner to have it in a seperate
file rather than trying to update the structure inside the awk script. :-)

At exec time, the dozen bytes or so of signal trampoline code are copied
to the top of the user's stack, rather than obtaining the trampoline code
the old way by getting a clone of the parent's user area.  This allows
Linux and native binaries to freely exec each other without getting
trampolines mixed up.
1996-03-02 19:38:20 +00:00
peter
1e1d050e1f This is an extract of changes from what I am currently running...
- Optimise the linux a.out loading and uselib system calls so they
  take advantage of some of John's recent interface improvements.
  Basically, this means they make far less map changes than before.
- Attempt to plug some potentially nasty kernel_map memory leaks..
- Improve support for QMAGIC libs (I only use QMAGIC (ie: a.out libraries from
  the slackware 3.0 dist) but this depends on other changes to enhance
  the /compat/linux support)
- uselib goes out through a single exit as part of the resource tracking
  that I did when closing the resource leaks on errors.  This could be
  cleaner than what I did, but making a 30-deep nested if/else was not my
  idea of fun, neither did I want to repeat the same code 30 times over for
  each failure possibility.  I guess this function needs to be split into
  smaller functions to solve this.

I've been running the Linux Netscape-2.0 (with Java) to test this, and apart
from the long-standing problem with the missing scrollbars, it appears to
still work as before with ZMAGIC libs (and the leaks)..  However, I've
been using it with mods for the signal trampoline code for native linux stack
frames on signals and exterminated the blasted sigreturn printf() problem,
so I can't be certain that there is not a dependency on something else.
1996-02-16 18:40:50 +00:00
peter
84050bbcdf Call pipe_stat() when presented with a DTYPE_PIPE file in the linux
fstat() syscall, rather than panic("linux newfstat").

(Note: I've extracted this from a larger set of diffs, I'm confident I've
 not missed any dependencies but can't modload it to test it on my system)
1996-01-30 12:23:17 +00:00
dyson
58e23ce4f1 Fixed vm_map_find for new vm updates. 1996-01-19 22:59:24 +00:00
sos
8c205b9407 Add linux_mknod so that it will do mkfifo if needed... 1996-01-14 10:59:58 +00:00
peter
78ea23da57 reran makesyscalls
Always call the SYSV ipc functions, stubs will take their place if
necessary.
1996-01-08 04:34:54 +00:00
wollman
00da297c27 The Linux emulator depends on SYSV IPC but doesn't actually reference
the options.
1996-01-05 19:52:49 +00:00
sos
a46db64107 Oops, forgot a little difference between my src-tree and ours... 1995-12-30 00:42:25 +00:00
sos
538a5b2539 My first shot at get sound to work on the emulator.
Inspired by the work Amancio Hasty has done, but implemented
somewhat differently.
1995-12-29 22:12:14 +00:00
peter
636d20f6c7 Update linux_ipc.c to use the now generated prototypes for the shm* calls
it makes while emulating the linux equivalents.
1995-12-15 05:07:20 +00:00
peter
9d6192fef3 Initial attempt at getting Linux QMAGIC shared lib support. I have
successfully run linux netscape 2.0b3 with a QMAGIC ld.so and libc/libm
that I found on some linux machine that I _think_ is running slackware 3.0.

There are still problems..  ld.so claims the libraries are the wrong
format, but it still runs anyway.. :-/  The QMAGIC ld.so also screams
about needing ld.so.cache, and running a linux ldconfig is quite
educational.  You soon learn to run "chroot /compat/linux /bin/ldconfig"
where ldconfig is living in /compat/linux/bin. :-]

(Lets just say that it puts loads of symlinks in /usr/lib otherwise :-)
1995-12-15 03:28:38 +00:00
peter
8050b72571 Clean up some warnings by using the generated structures in <sys/sysproto.h>
for passing to the bsd system calls, rather than inveninting our own
equivalent structures.
1995-12-15 03:06:57 +00:00
bde
000052aa20 Restored a vm #include. 1995-12-14 22:35:45 +00:00
peter
b74c5f04ae Attempt to make the Linux LKM compile again after the recent VM include
de-nesting changes...
(I figured this might be usefulif it actually built, since I've told
 everybody to rebuild it or die.. :-)
1995-12-09 08:17:24 +00:00
bde
31b8d1b267 Include <vm/vm.h> explicitly to avoid breaking when vnode_if.h doesn't
include vm stuff.
1995-12-06 19:14:16 +00:00
bde
d25c47b91e Completed function declarations and added prototypes.
Removed some unnecessary #includes.

Fixed warnings about nested externs.
1995-11-22 07:43:53 +00:00
dg
2442a8a02f All:
Changed vnodep -> vp for consistency with the rest of the kernel, and
changed iparams -> imgp for brevity.

kern_exec.c:
   Explicitly initialized some additional parts of the image_params struct
to avoid bzeroing it. Rewrote the set-id code to reduce the number of
logical tests. The rewrite exposed a mostly benign bug in the algorithm:
traced set-id images would get ktracing disabled even if the set-id didn't
happen for other reasons.
1995-11-06 12:52:37 +00:00
swallace
881c387a1a Fix the getdirentries of ibcs2 to handle uneven DIRBLKSIZ offsets.
Slight modification from previous fix.

Also, fix problem where an entry would be skipped next call if not enough room
in buffer current call.
1995-10-10 23:13:27 +00:00
julian
97e00737e6 Submitted by: Juergen Lock <nox@jelal.hb.north.de>
Obtained from: other people on the net ?

1. stepping over syscalls (gdb ni) sends you to DDB, and returned
to the wrong address afterwards, with or without DDB.  patch in
i386/i386/trap.c below.

2. the linux emulator (modload'ed) still causes panics with DIAGNOSTIC,
re-applied a patch posted to one of the lists...
1995-10-04 07:08:04 +00:00
julian
3bba784ace Reviewed by: julian with quick glances by bruce and others
Submitted by:	terry (terry lambert)
This is  a composite of 3 patch sets submitted by terry.
they are:
New low-level init code that supports loadbal modules better
some cleanups in the namei code to help terry in 16-bit character support
some changes to the mount-root code to make it a little more
modular..

NOTE: mounting root off cdrom or NFS MIGHT be broken as I haven't been able
to test those cases..

certainly mounting root of disk still works just fine..
mfs should work but is untested. (tomorrows task)

The low level init stuff includes a total rewrite of init_main.c
to make it possible for new modules to have an init phase by simply
adding an entry to a TEXT_SET (or is it DATA_SET) list. thus a new module can
be added to the kernel without editing any other files other than the
'files' file.
1995-08-28 09:19:25 +00:00
swallace
c73af03312 Modified linux_readdir() function to properly handle Linux readdir()
calls with a byte size of 1.  This special case was not
correctly emulated.  Now programs such as a simple 'ls' to a commercial
Macintosh emulator called 'executor' will work correctly.
1995-08-28 00:50:08 +00:00
sos
905ac8cd1d First incarnation of our Linux emulator or rather compatibility code.
This first shot only incorporaties so much functionality that DOOM
can run (the X version), signal handling is VERY weak, so is many
other things. But it meets my milestone number one (you guessed it
- running DOOM).

Uses /compat/linux as prefix for loading shared libs, so it won't
conflict with our own libs.

Kernel must be compiled with "options COMPAT_LINUX" for this to work.
1995-06-25 17:32:43 +00:00