Commit Graph

90 Commits

Author SHA1 Message Date
David Schultz
7b74e4a759 Remove fpsetsticky(). This was added for SysV compatibility, but due
to mistakes from day 1, it has always had semantics inconsistent with
SVR4 and its successors.  In particular, given argument M:

- On Solaris and FreeBSD/{alpha,sparc64}, it clobbers the old flags
  and *sets* the new flag word to M.  (NetBSD, too?)
- On FreeBSD/{amd64,i386}, it *clears* the flags that are specified in M
  and leaves the remaining flags unchanged (modulo a small bug on amd64.)
- On FreeBSD/ia64, it is not implemented.

There is no way to fix fpsetsticky() to DTRT for both old FreeBSD apps
and apps ported from other operating systems, so the best approach
seems to be to kill the function and fix any apps that break.  I
couldn't find any ports that use it, and any such ports would already
be broken on FreeBSD/ia64 and Linux anyway.

By the way, the routine has always been undocumented in FreeBSD,
except for an MLINK to a manpage that doesn't describe it.  This
manpage has stated since 5.3-RELEASE that the functions it describes
are deprecated, so that must mean that functions that it is *supposed*
to describe but doesn't are even *more* deprecated.  ;-)

Note that fpresetsticky() has been retained on FreeBSD/i386.  As far
as I can tell, no other operating systems or ports of FreeBSD
implement it, so there's nothing for it to be inconsistent with.

PR:		75862
Suggested by:	bde
2005-03-15 15:53:39 +00:00
David Schultz
1dfab5edec Define LDBL_NBIT to be a mask indicating the position of the integer
bit in a long double.  For architectures that don't have such a bit,
LDBL_NBIT is 0.  This makes it possible to say `mantissa & ~LDBL_NBIT'
in places that previously used an #ifdef to select the right expression.
The optimizer should dispense with the extra arithmetic when LDBL_NBIT
is 0.
2005-03-07 04:55:22 +00:00
David Schultz
f154b03b25 Update my email address. 2005-02-06 03:23:31 +00:00
David Schultz
00646ca204 Replace the ldexp() implementation in libc with a renamed copy of the
scalbn() implementation from libm.  (The two functions are defined to
be identical, but ldexp() lives in libc for backwards compatibility.)
The old ldexp() implementation...
  - was more complicated than this one
  - set errno instead of raising FP exceptions
  - got some corner cases wrong
    (e.g. ldexp(1.0, 2000) in round-to-zero mode)

The new implementation lives in libc/gen instead of
libc/$MACHINE_ARCH/gen, since we don't need N copies of a
machine-independent file.  The amd64 and i386 platforms
retain their fast and correct MD implementations and
override this one.
2005-01-22 06:03:40 +00:00
David Schultz
bd15659f64 Eliminate gdtoa.mk and move its contents to ${MACHINE_ARCH}/Makefile.inc.
The purpose of having a separate file involved an abandoned scheme that
would have kept contrib/gdtoa out of the include path for the rest of libc.
2005-01-15 05:23:58 +00:00
Peter Edwards
2909df6916 When required to negate the absoulte result of a division/remainder
operation (by subtracting the absolute result from 0), don't test
for overflow.

This avoids an arithmetic exception when dividing LONG_MIN by 1:
This is the only case that causes overflow, and the resulting value
is correct under 2's compliment arithmetic.

PR:		72024
Approved by:	dwmalone@
Obtained from:	NetBSD
MFC after:	4 days
2004-11-27 20:59:49 +00:00
Ruslan Ermilov
a35d88931c For variables that are only checked with defined(), don't provide
any fake value.
2004-10-24 15:33:08 +00:00
Doug Rabson
e9abf2d6e2 Fix alpha build and add __FBSDID.
PR: 70518
2004-08-16 08:12:29 +00:00
Doug Rabson
ccd13c49b5 Add support for TLS in statically linked programs. 2004-08-15 16:18:52 +00:00
David Schultz
39bcea8689 Replace seven nominally MD implementations of frexp() that are broken
for subnormals with one implementation that works.
2004-07-18 21:23:39 +00:00
David Schultz
240dbabfa8 Implement the classification macros isfinite(), isinf(), isnan(), and
isnormal() the hard way, rather than relying on fpclassify().  This is
a lose in the sense that we need a total of 12 functions, but it is
necessary for binary compatibility because we have never bumped libm's
major version number.  In particular, isinf(), isnan(), and isnanf()
were BSD libc functions before they were C99 macros, so we can't
reimplement them in terms of fpclassify() without adding a dependency
on libc.so.5.  I have tried to arrange things so that programs that
could be compiled in FreeBSD 4.X will generate the same external
references when compiled in 5.X.  At the same time, the new macros
should remain C99-compliant.

The isinf() and isnan() functions remain in libc for historical
reasons; however, I have moved the functions that implement the macros
isfinite() and isnormal() to libm where they belong.  Moreover,
half a dozen MD versions of isinf() and isnan() have been replaced
with MI versions that work equally well.

Prodded by:	kris
2004-07-09 03:32:40 +00:00
Dag-Erling Smørgrav
261e614637 Use unions to avoid violating C99 strict aliasing rules. 2004-03-16 20:42:02 +00:00
David Schultz
36e22bed27 Fix some aliasing problems. 2004-02-16 10:02:40 +00:00
David Schultz
a8cb7cca02 Define LDBL_MANH_SIZE and LDBL_MANL_SIZE to be the sizes of the
high and low words of the mantissa in bits, respectively.
2004-01-18 07:57:02 +00:00
Jacques Vidrine
e4dc8baa84 Provide sysarch(2) prototypes in the MD sysarch.h headers. While I'm
at it, use the ANSI C generic pointer type for the second argument,
thus matching the documentation.

Remove the now extraneous (and now conflicting) function declarations
in various libc sources.  Remove now unnecessary casts.

Reviewed by:	bde
2004-01-09 16:52:09 +00:00
Jacques Vidrine
2d24bf11c8 Add required headers and function declarations. 2004-01-06 19:28:07 +00:00
Jeff Roberson
d1bbae0dfc - Use the magic for ___sigreturn in __sigset.
- In __sigreturn call sigprocmask() to restore our signal state rather than
   returning through sigreturn().  jmp to ___sigreturn to restore our register
   state following this.

Requested by:	pete
2003-11-14 03:21:22 +00:00
Tim J. Robbins
4539e95a0f Remove incomplete support for running FreeBSD userland on old NetBSD kernels
lacking the issetugid() and utrace() syscalls.
2003-10-29 10:45:01 +00:00
Marcel Moolenaar
d4c89eb0a1 Fix wrong identifier on .end directive. The SYSCALL macro does name
mangling and creates an .ent directive with the mangled name.
2003-08-16 18:59:08 +00:00
Bruce M Simpson
abd498aa71 Add the mlockall() and munlockall() system calls.
- All those diffs to syscalls.master for each architecture *are*
   necessary. This needed clarification; the stub code generation for
   mlockall() was disabled, which would prevent applications from
   linking to this API (suggested by mux)
 - Giant has been quoshed. It is no longer held by the code, as
   the required locking has been pushed down within vm_map.c.
 - Callers must specify VM_MAP_WIRE_HOLESOK or VM_MAP_WIRE_NOHOLES
   to express their intention explicitly.
 - Inspected at the vmstat, top and vm pager sysctl stats level.
   Paging-in activity is occurring correctly, using a test harness.
 - The RES size for a process may appear to be greater than its SIZE.
   This is believed to be due to mappings of the same shared library
   page being wired twice. Further exploration is needed.
 - Believed to back out of allocations and locks correctly
   (tested with WITNESS, MUTEX_PROFILING, INVARIANTS and DIAGNOSTIC).

PR:             kern/43426, standards/54223
Reviewed by:    jake, alc
Approved by:    jake (mentor)
MFC after:	2 weeks
2003-08-11 07:14:08 +00:00
Daniel Eischen
df2edfa20a Add signalcontext() which will be needed by libpthread.
Reviewed by:	marcel
2003-08-09 05:37:54 +00:00
Marcel Moolenaar
2cd199ce21 Only allow trapframe formats instead of sigframe formats like the
comment says and don't write the first 3 arguments to FRAME_TRAPARG_*
as they are specific to sigframes.
2003-07-30 06:36:20 +00:00
David Schultz
b7412bf571 Add a comment describing why it's important for the values in this
file to be correct, and how to generate them automatically.

Caused much pain and suffering for:	peter
2003-05-08 13:50:44 +00:00
David Schultz
92b93b37c0 Add __ldtoa(), a wrapper around gdtoa() to make it look like dtoa().
In support of this, add some MD macros to assist in converting long
doubles to the format expected by gdtoa().

Reviewed by:	silence on standards@
2003-04-05 22:10:13 +00:00
David Schultz
6a66acb565 Replace our ancient dtoa/strtod implementation with the gdtoa
package, a more recent, generalized set of routines.  Among the
changes:
- Declare strtof() and strtold() in stdlib.h.
- Add glue to libc to support these routines for all kinds
  of ``long double''.
- Update printf() to reflect the fact that dtoa works slightly
  differently now.

As soon as I see that nothing has blown up, I will kill
src/lib/libc/stdlib/strtod.c.  Soon printf() will be able
to use the new routines to output long doubles without loss
of precision, but numerous bugs in the existing code must
be addressed first.

Reviewed by:	bde (briefly), mike (mentor), obrien
2003-03-12 20:30:00 +00:00
Daniel Eischen
cd7be69206 Remove these from libc; they are now system calls.
Prompted by:	mini
2003-02-18 12:31:57 +00:00
Mike Barcroft
5d62092f94 o Implement C99 classification macros isfinite(), isinf(), isnan(),
isnormal().  The current isinf() and isnan() are perserved for
  binary compatibility with 5.0, but new programs will use the macros.
o Implement C99 comparison macros isgreater(), isgreaterequal(),
  isless(), islessequal(), islessgreater(), isunordered().

Submitted by:	David Schultz <dschultz@uclink.Berkeley.EDU>
2003-02-12 20:03:41 +00:00
Mike Barcroft
8cf5ed5125 Implement fpclassify():
o Add a MD header private to libc called _fpmath.h; this header
  contains bitfield layouts of MD floating-point types.
o Add a MI header private to libc called fpmath.h; this header
  contains bitfield layouts of MI floating-point types.
o Add private libc variables to lib/libc/$arch/gen/infinity.c for
  storing NaN values.
o Add __double_t and __float_t to <machine/_types.h>, and provide
  double_t and float_t typedefs in <math.h>.
o Add some C99 manifest constants (FP_ILOGB0, FP_ILOGBNAN, HUGE_VALF,
  HUGE_VALL, INFINITY, NAN, and return values for fpclassify()) to
  <math.h> and others (FLT_EVAL_METHOD, DECIMAL_DIG) to <float.h> via
  <machine/float.h>.
o Add C99 macro fpclassify() which calls __fpclassify{d,f,l}() based
  on the size of its argument.  __fpclassifyl() is never called on
  alpha because (sizeof(long double) == sizeof(double)), which is good
  since __fpclassifyl() can't deal with such a small `long double'.

This was developed by David Schultz and myself with input from bde and
fenner.

PR:		23103
Submitted by:	David Schultz <dschultz@uclink.Berkeley.EDU>
		(significant portions)
Reviewed by:	bde, fenner (earlier versions)
2003-02-08 20:37:55 +00:00
David E. O'Brien
bd2d1003c1 Use __FBSDID. 2003-01-19 00:17:03 +00:00
Ruslan Ermilov
c51d717f0c libc_r wasn't so tied to libc for 22 months. 2002-11-18 09:50:57 +00:00
Daniel Eischen
9ed358fddc Disconnect the userland get/set/swapcontext() functions from
libc.  I want to keep these in some version for the thread
library/ies, but don't know whether to have them repo-copied
to libc_r or renamed and kept in libc.

Change the name of an alpha macro that was changed with the
system call commit.
2002-11-16 06:39:11 +00:00
Archie Cobbs
83999f5a32 Re-apply the previously backed-out commit that fixes the problem where
HUGE_VAL is not properly aligned on some architectures. The previous
fix now works because the two versions of 'math.h' (include/math.h
and lib/msun/src/math.h) have since been merged into one.

PR:	bin/43544
2002-10-31 23:05:20 +00:00
Archie Cobbs
ae8a4b2f36 Revert previous commit to unbreak world until we figure out the
right way to do it.
2002-09-20 15:43:26 +00:00
Archie Cobbs
f5f1272284 Fix a problem with the definition of HUGE_VAL causing the gcc warning
"cast increases required alignment of target type" on some platforms.

Reviewed by:	bde
2002-09-19 19:47:27 +00:00
Jake Burkholder
530622075e Generate the normal asm stubs for all sysv system calls. Use these instead
of C wrappers for the *sys indirect system calls.  The indirect system calls
are horribly broken on sparc64.

Submitted by:	tmm
2002-05-23 23:51:57 +00:00
David E. O'Brien
c027737942 Our default syscall.S is identical to what was explicitly being done for
Alpha and IA-64.  So there is no need for special handling.
2002-05-15 21:17:59 +00:00
David E. O'Brien
1114a754ed Fix the style of the SCM ID's.
I believe have made all of libc .h's as consistent as possible.
2002-03-22 23:42:05 +00:00
David E. O'Brien
8fb3f3f682 Remove 'register' keyword. 2002-03-21 18:49:23 +00:00
Peter Wemm
cc2dbb21e5 Move swapcontext.c to the ${MACHINE_ARCH}/gen/Makefile.inc area, otherwise
it causes undefined references to getcontext() and setcontext() on
platforms other than i386 and alpha.
2002-03-21 06:45:32 +00:00
Mike Barcroft
fd8e4ebc8c o Move NTOHL() and associated macros into <sys/param.h>. These are
deprecated in favor of the POSIX-defined lowercase variants.
o Change all occurrences of NTOHL() and associated marcros in the
  source tree to use the lowercase function variants.
o Add missing license bits to sparc64's <machine/endian.h>.
  Approved by: jake
o Clean up <machine/endian.h> files.
o Remove unused __uint16_swap_uint32() from i386's <machine/endian.h>.
o Remove prototypes for non-existent bswapXX() functions.
o Include <machine/endian.h> in <arpa/inet.h> to define the
  POSIX-required ntohl() family of functions.
o Do similar things to expose the ntohl() family in libstand, <netinet/in.h>,
  and <sys/param.h>.
o Prepend underscores to the ntohl() family to help deal with
  complexities associated with having MD (asm and inline) versions, and
  having to prevent exposure of these functions in other headers that
  happen to make use of endian-specific defines.
o Create weak aliases to the canonical function name to help deal with
  third-party software forgetting to include an appropriate header.
o Remove some now unneeded pollution from <sys/types.h>.
o Add missing <arpa/inet.h> includes in userland.

Tested on:	alpha, i386
Reviewed by:	bde, jake, tmm
2002-02-18 20:35:27 +00:00
Daniel Eischen
b66b8326e5 Add getcontext, setcontext, makecontext, and swapcontext. These
functions are defined in SUSv2 and the latest POSIX spec.

Thanks to Bernd Walter <ticso@cicely8.cicely.de> for helping debug my
alpha assembly.

Approved by:	-arch
2002-01-10 02:40:59 +00:00
Daniel Eischen
8572518672 Save and restore t12 in the jmp_buf. t12 is used during function
calls.

This change allows libc_r to create thread contexts with a different
stack and return address.

With much detective work by: Bernd Walter <ticso@cicely.de>
2001-12-22 06:06:17 +00:00
David E. O'Brien
482a6000bb Fix vendor ID's. 2001-11-07 22:12:52 +00:00
Daniel Eischen
c37592a194 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
Daniel Eischen
f3e8cfe5ef Comment only change; s/_thread_sys_/__sys_/ 2001-01-26 02:41:07 +00:00
Daniel Eischen
d201fe46e3 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
Jake Burkholder
4231c165f7 Remove last vestiges of thr_sleep and thr_wakeup from libc. 2000-12-02 05:58:03 +00:00
John Baldwin
4f9d9dc272 Remove duplicate FreeBSD id tags. 2000-08-21 21:05:44 +00:00
Peter Wemm
13dfe2f092 Take a shot at implementing a functional rfork_thread() for alpha. This
was not fun and I am not entirely certain of the correctness, but it seems
to work.  (in fact, side by side testing of this code vs the x86 version
turned up hidden bugs in the x86 code).
2000-07-29 11:43:21 +00:00
John Baldwin
bde8875a06 Finish moving all IEEE fp types to be the same on all arch's. 2000-05-10 19:41:40 +00:00