Commit Graph

83 Commits

Author SHA1 Message Date
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
ccd13c49b5 Add support for TLS in statically linked programs. 2004-08-15 16:18:52 +00:00
Alexander Kabaev
698784bef7 s/round/fpround/ to avoid naming clash with GCC builtin function. 2004-07-28 05:41:05 +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
Colin Percival
1c81bd2c60 style cleanup: Remove duplicate $FreeBSD$ tags.
These files had tags after teh copyright notice,
inside the comment block (incorrect, removed),
and outside the comment block (correct).

Approved by:	rwatson (mentor)
2004-02-10 20:45:28 +00:00
Jacques Vidrine
07a6d1d3f2 Add prototypes for the three syscall stubs that are invoked here,
in order to quiet warnings.
2004-01-19 16:14:58 +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
3d7cd67f51 We need to discard `const'ness explicitly when invoking sysarch.
Reported by:	sparc64 tinderbox via bde
2004-01-10 15:57:06 +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
78ea1df143 Remove unused variables. Add required headers and function
declarations.
2004-01-06 18:53:26 +00:00
Jake Burkholder
eaf21f315e Install the user trap handlers that libc provides from a constructor, so
that they will be installed before application constructors are invoked.
Its possible to link applications such that this fails, application code
is invoked before they are installed, but, well, Don't Do That.

Approved by:	re (jhb)
2003-11-18 14:21:41 +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
Jake Burkholder
b551cb80d4 Implement signalcontext. 2003-08-08 15:40:28 +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
Jake Burkholder
9f5a511863 Implement makecontext. 2003-04-01 23:28:50 +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
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
Thomas Moestl
e506034ec1 Rewrite longjmp() and _longjmp() to directly restore the saved frame,
instead of unwinding the call stack. This makes them usable to switch
stacks, e.g. for libc_r.
Do not save the frame pointer in setjmp() and _setjmp(), it is not needed
any more.
Rename _longjmp() to ___longjmp(), with a weak alias to _longjmp(), like
the other architectures did.
2003-01-05 22:17:32 +00:00
Thomas Moestl
6c83076634 Rename siglongjmp() to __siglongjmp(), with a weak alias to siglongjmp(),
like the other architectures do.
2003-01-05 22:10:06 +00:00
Ruslan Ermilov
c51d717f0c libc_r wasn't so tied to libc for 22 months. 2002-11-18 09:50:57 +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
Jake Burkholder
2ecf9f7162 Rename the libc signal trampoline to __sigtramp to match netbsd. This
should allow gdb to detect when we're executing in a signal trampoline.
2002-10-22 15:15:39 +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
Thomas Moestl
6c788325fa Use the macros from machine/fsr.h; some minor cleanups. 2002-09-14 18:07:03 +00:00
Thomas Moestl
8579151e4b Add implementations of fpgetmask(), fpgetround(), fpgetsticky(),
fpsetround(), fpsetsticky(), obtained from NetBSD and tweaked a little
to use definitions from machine/fsr.h instead of magic numbers.
2002-09-14 18:06:21 +00:00
Thomas Moestl
f085ae60c0 Add an implementation of fabs() (which is quite trivial).
When it is called directly, gcc is smart enough to generate inline
code for it, which is why it wasn't noticed before that it was missing.

fabs() would probably better fit into libm, but it has traditionally been
in libc on FreeBSD, so there is probably software around that makes
assumptions about this by now.
2002-09-13 16:01:26 +00:00
Jake Burkholder
89172e2e25 Install the userland signal trampoline when sigaction is first called,
instead of on startup.  This fixes binary compatibility of dynamically
linked binaries from before the signal code move.

Suggested by:	wollman (a long time ago)
2002-09-03 14:55:29 +00:00
Jake Burkholder
ae162f3f31 Use FOO(a) for macros with variadic args, instead of FOO(a,) or FOO(a, ).
Submitted by:	gcc3.2
2002-09-02 02:30:20 +00:00
Thomas Moestl
58d646cdd3 Add missing ret instruction to the ptrace() syscall wrapper. 2002-07-11 15:48:02 +00:00
David E. O'Brien
3b7de54d68 Use FBSDID 2002-06-30 05:36:49 +00:00
David E. O'Brien
2d39517f33 Use __FBSDID. 2002-06-29 03:23:51 +00:00
David E. O'Brien
45d767fbbe Add frexp(3).
Obtained from:	OpenBSD
2002-06-29 03:23:18 +00:00
Jake Burkholder
dbf51f8db4 Remove unneeded include of machine/emul.h. 2002-06-18 02:15:11 +00:00
Jake Burkholder
3671cacae1 Implement _Qp_sqrt. I've been unable to find a C program that gcc generates
a call to this for, but apparently somehing in libstdc++ does.
2002-06-04 17:02:27 +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
Jake Burkholder
5893472b2d Use the right byte order for unaligned stores. <blush>. 2002-05-13 22:48:01 +00:00
Jake Burkholder
30eeff14ef Handle alignment fault fixups in libc rather than in the kernel. 2002-05-13 04:35:08 +00:00
Jake Burkholder
025c284b8d Add a support macro to convert the 5-bit packed register field of
a floating point instruction into a 6-bit register number for
double and quad arguments.
Make use of the new INSFPdq_RN macro where apporpriate; this
is required for correctly handling the "high" fp registers
(>= %f32).
Fix a number of bugs related to the handling of the high registers
which were caused by using __fpu_[gs]etreg() where __fpu_[gs]etreg64()
should be used (the former can only access the low, single-precision,
registers).

Submitted by:	tmm
2002-05-11 21:20:05 +00:00
David E. O'Brien
1f92f7e5d3 Use __FBSDID 2002-05-06 23:24:39 +00:00
David E. O'Brien
fd97c6aea9 We typically don't add trailing /'s. 2002-05-06 23:24:16 +00:00
Jake Burkholder
621136996a Add an alternate signal trampoline to libc; add a wrapper for the sigtramp
install sysarch, to be called from _start.

This will allow the stack to be mapped non-executable, as required by the
sparc v9 abi.
2002-04-29 18:14:44 +00:00
Jake Burkholder
05f2fa5cee Add code to emulate arithmetic, comparison and conversion operations
on long double, which are not implemented in hardware on any UltraSPARC
chip that I know of.  This just calls into the existing floating point
emulator, which is still needed to emulate other floating point operations
in certain conditions.  Without this gcc has to generate the quad floating
point instructions directly, which sometimes causes internal compiler
errors.

Reviewed by:	tmm
2002-04-28 02:36:36 +00:00
Jake Burkholder
8c93421144 Emulate ldq and stq (load/store long double) instructions. GCC has started
using these to load long doubles, but they aren't implemented in hardware
on (at least) UltraSPARC I and II machines.
Emulate popc in the user trap handler as well.
Re-arrange slightly to make support functions more accessible.

Reviewed by:	tmm
2002-04-27 21:56:28 +00:00
Jake Burkholder
82436f1067 Rename some fields in struct frame to be compatible with NetBSD/OpenBSD,
and add some compatibility defines.  Add fields for ins and locals to
struct reg also for the same reason; these aren't filled in yet because
getting at those registers sucks and I'd rather not save them in the
trapframe just for this.  Reorder struct reg to be ABI compatible as
well.  Add needed include of machine/emul.h.

This gets pmdb (poor man's debugger) from OpenBSD mostly compiling but it
doesn't work yet :(
2002-04-09 00:57:23 +00:00