Commit Graph

108 Commits

Author SHA1 Message Date
deischen
ca55abf319 Clean up syscall generation in libc by removing HIDDEN_SYSCALLS
and treating (almost) all system calls the same way:

	__sys_foo - actual syscall
	foo, _foo - weak definitions to __sys_foo

Change PSEUDO syscalls (currently only _exit and _getlogin) to
be __sys_foo (T) and _foo (W).

Add $FreeBSD$ to a few files to satisfy commitprep.

Suggested by:	bde
2001-01-29 03:23:46 +00:00
deischen
56363d25db Comment only change; s/_thread_sys_/__sys_/ 2001-01-26 02:41:07 +00:00
deischen
1635c221b7 Remove _THREAD_SAFE and make libc thread-safe by default by
adding (weak definitions to) stubs for some of the pthread
functions.  If the threads library is linked in, the real
pthread functions will pulled in.

Use the following convention for system calls wrapped by the
threads library:
	__sys_foo - actual system call
	_foo - weak definition to __sys_foo
	foo - weak definition to __sys_foo

Change all libc uses of system calls wrapped by the threads
library from foo to _foo.  In order to define the prototypes
for _foo(), we introduce namespace.h and un-namespace.h
(suggested by bde).  All files that need to reference these
system calls, should include namespace.h before any standard
includes, then include un-namespace.h after the standard
includes and before any local includes.  <db.h> is an exception
and shouldn't be included in between namespace.h and
un-namespace.h  namespace.h will define foo to _foo, and
un-namespace.h will undefine foo.

Try to eliminate some of the recursive calls to MT-safe
functions in libc/stdio in preparation for adding a mutex
to FILE.  We have recursive mutexes, but would like to avoid
using them if possible.

Remove uneeded includes of <errno.h> from a few files.

Add $FreeBSD$ to a few files in order to pass commitprep.

Approved by:	-arch
2001-01-24 13:01:12 +00:00
ru
8ba4187688 Prepare for mdoc(7)NG. 2000-12-29 14:08:20 +00:00
jake
cec123a65f Remove last vestiges of thr_sleep and thr_wakeup from libc. 2000-12-02 05:58:03 +00:00
jhb
09e0dbdcd9 Prefix the register argument of indirect 'jmp's with a * to make gas 2.10.x
happy.
2000-11-28 22:59:14 +00:00
ru
eb8c554f56 mdoc(7) police: use certified section headers wherever possible. 2000-11-17 11:44:16 +00:00
bsd
878d7f2499 Add a couple of debug register helper functions to assist in setting
and clearing watchpoints.

Reviewed by:	jwd@FreeBSD.org, -hackers@
2000-09-21 17:07:27 +00:00
peter
1ca10015af Fix some rather interesting bugs that managed to not turn up in various
testing and real-life applications:
1) If you returned from the thread function, you got a segv instead of
  calling _exit() with your return code.
2) clean up some bogus stack management.  There was also an underflow
  on function return.
3) when making syscalls, the kernel is expecting to have to leave space
  for the function's return address.  We need to duplicate this.  It was
  an accident that the rfork syscall actually worked here. :-/
2000-07-29 11:34:01 +00:00
peter
6a75b120d2 rfork(2) wrapper for simple rfork-style threads. I have lost count of
the number of times I have given this to people and got asked: why isn't
it in libc?  It is impossible to do this without assembler glue to reset
the stack for the new child process.

int rfork_thread(flags, stack_addr, start_fnc, start_arg)
int flags;                 Flags to rfork system call.  See rfork(2).
void *stack_addr;          Top of stack for thread.
int (*start_fnc)(void *);  Address of thread function to call in child.
void *start_arg;           Argument to pass to the thread function in child.

This is deliberately not documented or prototyped in includes until the
corresponding alpha version is written.
2000-07-29 07:14:04 +00:00
alex
df391a5a36 You need options USER_LDT in your kernel to use these functions.
PR:		18943
Submitted by:	Ben Smithurst <ben@scientia.demon.co.uk>
Reviewed by:	asmodai
2000-06-14 13:38:21 +00:00
phantom
a60a1ebfb4 Use `Er' variable to define first column width in ERRORS section. 2000-05-06 12:07:59 +00:00
jasone
bb0124f71c Use assembler directives rather than ALTENTRY() so that longjmp() and
siglongjmp() are weak symbols.  This is necessary to allow static linking
with the linuxthreads library port.
2000-05-04 04:36:26 +00:00
phantom
5401879e3b Introduce ".Lb" macro to libc manpages.
More libraries manpages updates following.
2000-04-21 09:42:15 +00:00
jasone
23c4215cb0 Take care to avoid having "strong" and "weak" symbols of the same name in
libc_r.
2000-03-16 02:14:41 +00:00
jasone
b7a1b427de Undo the ill-conceived breakage of the previous commit and really fix:
For libc_r renamed syscalls, correct symbol naming from
_thread_sys_foo() <-- _foo() to _thread_sys_foo() <-- _foo() <-- foo().  This
is necessary for system calls which libc_r doesn't define foo().

Some weak symbols such as poll() are defined twice.  From what I understand,
depending on one weak symbol or the other to be used is a bad idea.  All
such weak symbols defined in the libc_r-specific code should therefore be
made strong (non-weak?).

Simplify PSEUDO() to not define any weak symbols, since they aren't ever
needed.

alpha/SYS.h:

Correct reversed usage of WEAK_ALIAS(), which has reversed arguments from
__weak_reference().  Also, fix reversal of symbols, so that syscall foo()
is a weak alias for _foo().

Add WEAK_ALIAS() call to PRSYSCALL(), which unlike the i386 version of
PRSYSCALL(), is not defined in terms of PSYSCALL().

Make PSEUDO() equivalent to the i386 version.
2000-01-29 12:50:47 +00:00
jasone
d6a7c1c554 For syscalls that are renamed to _thread_sys_foo, create a weak alias
called _foo, not _thread_sys_foo.
2000-01-28 22:47:21 +00:00
jasone
8abe2a2d86 Simplify sytem call renaming. Instead of _foo() <-- _libc_foo <-- foo(),
just use _foo() <-- foo().  In the case of a libpthread that doesn't do
call conversion (such as linuxthreads and our upcoming libpthread), this
is adequate.  In the case of libc_r, we still need three names, which are
now _thread_sys_foo() <-- _foo() <-- foo().

Convert all internal libc usage of: aio_suspend(), close(), fsync(), msync(),
nanosleep(), open(), fcntl(), read(), and write() to _foo() instead of foo().

Remove all internal libc usage of: creat(), pause(), sleep(), system(),
tcdrain(), wait(), and waitpid().

Make thread cancellation fully POSIX-compliant.

Suggested by:	deischen
2000-01-27 23:07:25 +00:00
jasone
303a1b5e43 Remove unnecessary alternate entry points for *setjmp(). Make the main
entry point the standard name when not compiling libc_r (for example,
longjmp is the main entry point instead of __longjmp).

Suggested by:	bde
2000-01-20 21:58:27 +00:00
jasone
271b33587d Move ENTRY and ALTENTRY definitions to asm.h where they belong.
Unbreak profiling.  Again.

Submitted by:	bde
2000-01-20 03:15:01 +00:00
jasone
2c6582da15 Make minor entry point changes to support libc_r. 2000-01-19 07:01:40 +00:00
jasone
75903038bc Add three-tier symbol naming in support of POSIX thread cancellation
points.  For library functions, the pattern is __sleep() <--
_libc_sleep() <-- sleep().  The arrows represent weak aliases.  For
system calls, the pattern is _read() <-- _libc_read() <-- read().
2000-01-12 09:23:48 +00:00
jasone
ee0047e544 Unbreak profiling. bde says this is not the cleanest way to fix the
problem, but that it works.

Submitted by:	bde
2000-01-04 00:02:21 +00:00
jasone
15ffad75ec Creating weak symbols doesn't work correctly when building an aout libc.
Doing the "right thing" here is difficult, so create two ENTRY points for
each function (for example, __setjmp and setjmp are equivalent).  This
isn't pretty, but it works for both aout and ELF.

libc symbol naming needs an overhaul in order to properly support function
wrapping, specifically in the case of a real libpthread, and these
duplicate entry points should be fixed as part of that overhaul.

Pointed out by:	bde
1999-12-24 00:03:00 +00:00
jasone
2edcbc2e0b Make setjmp, longjmp, sigsetjmp, and siglongjmp weak aliases for
__setjmp, __longjmp, __sigsetjmp, and __siglongjmp, respectively.
This supports cancellation in the linuxthreads port.  In the long run,
a much more comprehensive solution will necessitate more dramatic changes
to libc symbol naming, and these aliases will probably need modification
at that time.
1999-12-14 20:17:52 +00:00
marcel
e56134da7a Remove osig* from NOASM. It bogus now. 1999-10-14 10:00:39 +00:00
marcel
bcf55ab2b8 \begin{quote}
setjmp() gets the jmp_buf pointer from the wrong place (the place
where the return address is) in the shlib case, and uses it (only)
to fetch the current signal mask to address (return_address + 28).
This address is normally read-only (I hope), so the sigprocmask()
call has no effect except to return an error code.
\end{quote}

Submitted by: bde
1999-10-10 08:38:33 +00:00
marcel
890df87b45 Remove syscall wrappers. 1999-10-09 15:27:09 +00:00
marcel
5bf7ce284b sigset_t change (part 5 of 5)
-----------------------------

Most of the userland changes are in libc. For both the alpha
and the i386 setjmp has been changed to accomodate for the
new sigset_t. Internally, libc is mostly rewritten to use the
new syscalls. The exception is in compat-43/sigcompat.c

The POSIX thread library has also been rewritten to use the
new sigset_t. Except, that it currently only handles NSIG
signals instead of the maximum _SIG_MAXSIG. This should not
be a problem because current applications don't use any
signals higher than NSIG.

There are version bumps for the following libraries:
  libdialog
  libreadline
  libc
  libc_r
  libedit
  libftpio
  libss

These libraries either a) have one of the modified structures
visible in the interface, or b) use sigset_t internally and
may cause breakage if new binaries are used against libraries
that don't have the sigset_t change. This not an immediate
issue, but will be as soon as applications start using the
new range to its fullest.

NOTE: libncurses already had an version bump and has not been
      given one now.

NOTE: doscmd is a real casualty and has been disconnected for
      the moment. Reconnection will eventually happen after
      doscmd has been fixed. I'm aware that being the last one
      to touch it, I'm automaticly promoted to being maintainer.
      According to good taste this means that I will receive a
      badge which either will be glued or mechanically stapled,
      drilled or otherwise violently forced onto me :-)

NOTE: pcvt/vttest cannot be compiled with -traditional. The
      change cause sys/types to be included along the way which
      contains the const and volatile modifiers. I don't consider
      this a solution, but more a workaround.
1999-09-29 15:18:46 +00:00
luoqi
4c5411b984 Use definitions provided in sysarch.h for args structures.
Reviewed by:	marcel
1999-09-02 21:03:32 +00:00
peter
76f0c923fe $Id$ -> $FreeBSD$ 1999-08-28 00:22:10 +00:00
dt
7d58f8f534 Add wrappers for pread and pwrite syscalls. 1999-04-04 21:46:24 +00:00
alex
7421117a22 EACESS -> EACCES 1999-03-15 00:14:57 +00:00
julian
61490236bc Reviewed by: Luoqi Chen, Jordan Hubbard
Submitted by:	 "Richard Seaman, Jr." <lists@tar.com>
Obtained from:	linux :-)

Code to allow Linux Threads to run under FreeBSD.

By default not enabled
This code is dependent on the conditional
COMPAT_LINUX_THREADS (suggested by Garret)
This is not yet a 'real' option but will be within some number of hours.
1998-12-19 02:55:34 +00:00
luoqi
c43759f857 Simplify implementation and eliminate a register preservation problem.
Reviewed by:	Bruce Evans <bde@zeta.org.au>
1998-09-18 05:50:52 +00:00
luoqi
d4dfc59a3f Fix a cut 'n paste mistake. 1998-09-13 20:32:45 +00:00
dt
613a2bdfde In libc_r, rename vfork syscall to _thread_sys_vfork and make vfork an alias
to fork. It is difficult to do real vfork in libc_r, since almost every
operation with file descriptsor changes _thread_fd_table and friends.

popen(3) works much better with this change.
1998-09-12 22:03:20 +00:00
bde
f4657fb06b Fixed missing header in synopsis. 1998-08-03 16:29:31 +00:00
bde
de10182213 Fixed disordering in previous commit. 1998-07-29 13:43:06 +00:00
jlemon
f3f6e5cc39 u_int --> unsigned int, remove (now unneeded) <sys/types.h> 1998-07-28 15:22:51 +00:00
jlemon
6a5deaf27d oops, forgot to do ``cvs add'' first. 1998-07-28 03:39:04 +00:00
jlemon
f4995111a0 Add wrappers for i386_*_ioperm, i386_vm86 so userland code does
not have to call sysarch() directly.
Added man pages for above, as well as sysarch()
1998-07-28 03:33:27 +00:00
steve
260fa64a35 Fix a bunch of spelling errors.
PR:		6856
Submitted by:	Josh Gilliam <josh@quick.net>
1998-06-04 21:06:07 +00:00
jb
d0233a4f17 Use the thread-aware errno definition all the time. 1998-05-05 22:07:02 +00:00
jb
87e29f1d78 Build the syscalls (in libc, not libc_r) with weak symbols so that
libpthread can override them as required.
1998-05-05 22:06:16 +00:00
jb
b1f25ca922 Oops, backout the previous change having confused my underscores.
__thread_create is a syscall that uses the default asm. It is
_thread_create that contains specific asm code, but that lives in
libpthread.
1998-04-30 10:02:44 +00:00
jb
ae9a13b7c7 Make cerror thread aware by calling __error() to get a pointer to the
thread-specific error variable. This change make libc use the same cerror
code that libc_r has been using.
1998-04-30 09:32:48 +00:00
jb
96749f4d5c The syscall that creates a kernel thread is coming, but it doesn't use the
default syscall asm, so add it to NOASM. The other syscalls that manipulate
kernel threads use the default asm code, so they just get built
automatically.
1998-04-30 09:30:50 +00:00
jb
da5557c468 Stop renaming these in libc_r because wrappered versions don't make sense.
PR: i386/4826, bin/5953
1998-04-29 09:14:35 +00:00
jb
d51b6829b7 Nearly missed this one.
List non-default asm sources in MDASM so that they replace the defaults.

For funny or incomplete syscalls, list them in NOASM to stop them
from getting built as defaults.
1998-03-09 07:36:56 +00:00