Commit Graph

10 Commits

Author SHA1 Message Date
Ed Maste
dae2d550d6 libc: stop exporting curbrk and minbrk in the private namespace
They are not used anywhere else in the base system and are an internal
implementation detail that does not need to be exposed.

Reviewed by:	kib
Sponsored by:	The FreeBSD Foundation
Differential Revision:	https://reviews.freebsd.org/D5728
2016-03-24 18:47:19 +00:00
Jilles Tjoelker
a8599e090f libc/i386: Do not export .cerror.
For some reason, libc exports the symbol .cerror (HIDENAME(cerror)), albeit
in the FBSDprivate_1.0 version. It looks like there is no reason for this
since it is not used from other libraries. Given that it cannot be accessed
from C and its strange calling convention, it is rather unlikely that other
things rely on it. Perhaps it is from a time when symbols could not be
hidden.

Not exporting .cerror causes it to be jumped to directly instead of via the
PLT.

This change also takes advantage of .cerror's new status by not saving and
loading %ebx before jumping to it. (Therefore, .cerror now saves and loads
%ebx itself.) Where there was a conditional jump to a jump to .cerror, the
conditional jump has been changed to jump to .cerror directly (many modern
CPUs don't do static prediction and in any case it is not much of a benefit
anyway).

This change makes libc.so.7 a few kilobytes smaller.

Reviewed by:	kib
2012-09-05 21:41:05 +00:00
David Schultz
6232589aeb Replace a proliferation of buggy MD implementations of modf() with a
working MI one.  The MI one only needs to be overridden on machines
with non-IEEE754 arithmetic.  (The last supported one was the VAX.)
It can also be overridden if someone comes up with a faster one that
actually passes the regression tests -- but this is harder than it sounds.
2011-10-21 06:40:36 +00:00
David Schultz
7cd4a83267 Since nan() is supposed to work the same as strtod("nan(...)", NULL),
my original implementation made both use the same code. Unfortunately,
this meant libm depended on a vendor header at compile time and previously-
unexposed vendor bits in libc at runtime.

Hence, I just wrote my own version of the relevant vendor routine. As it
turns out, mine has a factor of 8 fewer of lines of code, and is a bit more
readable anyway. The strtod() and *scanf() routines still use vendor code.

Reviewed by:	bde
2007-12-18 23:46:32 +00:00
David Schultz
39e7abef0e Export gdtoa's __ULto{x,Q}_D2A routine in a private namespace so
libm can use it.
2007-12-16 21:15:57 +00:00
Daniel Eischen
2665faf497 Some libc symbol map cleanups.
net: endhostdnsent is named _endhostdnsent and is
  private to netdb family of functions.

  posix1e: acl_size.c has been never compiled in,
  so there's no "acl_size".

  rpc: "getnetid" is a static function.

  stdtime: "gtime" is #ifdef'ed out in the source.

  some symbols are specific only to some architectures,
  e.g., ___tls_get_addr is only defined on i386.

  __htonl, __htons, __ntohl and __ntohs are no longer
  functions, they are now (internal) defines in
  <machine/endian.h>.

Submitted by:	ru
2007-05-31 13:01:34 +00:00
Daniel Eischen
0c58e013aa Remove .mcount from gmon's Symbol map and add it to the appropriate
arch.  It can be named differently depending on the arch (.mcount,
_mcount).

Submitted by:	marius
2007-05-13 14:16:55 +00:00
Daniel Eischen
5f864214bb Use C comments since we now preprocess these files with CPP. 2007-04-29 14:05:22 +00:00
Alexander Kabaev
445eba04a8 Clean-ip TLS symbol versions. [_]__tls_get_addr function is part of
the platform ABI and as such does not belong in FBSDprivate.

__libc_tls_* functions do not have to be visible to outside world
at all.
2007-04-09 22:48:08 +00:00
Daniel Eischen
cce72e8860 Add symbol maps and initial symbol version definitions to libc.
Reviewed by:	davidxu
2006-03-13 00:53:21 +00:00