Commit Graph

71 Commits

Author SHA1 Message Date
Chris Metcalf 4372980f58 Move tilegx, tilepro, and linux-generic from ports to libc.
I've moved the TILE-Gx and TILEPro ports to the main sysdeps hierarchy,
along with the linux-generic ports infrastructure.  Beyond the README
update, the move was just

    git mv ports/sysdeps/tile sysdeps/tile
    git mv ports/sysdeps/unix/sysv/linux/tile \
      sysdeps/unix/sysv/linux/tile
    git mv ports/sysdeps/unix/sysv/linux/generic \
      sysdeps/unix/sysv/linux/generic

I updated the relevant ChangeLogs along the lines of the ARM move
in commit c6bfe5c4d7 and tested the 64-bit tilegx build to confirm that
there were no changes in "objdump -dr" output in the shared objects.
2014-02-10 11:04:39 -05:00
Chris Metcalf cf965b144a tile: Regenerate libm-test-ulps 2014-01-24 13:23:23 -05:00
Mike Frysinger 9341dde4d5 ptrace.h: add __ prefix to ptrace_peeksiginfo_args
All the other ptrace structures in this file have a __ prefix except this
new one.  This in turn causes build problems for most packages that try to
use ptrace such as strace:

gcc -DHAVE_CONFIG_H -I. -I../..  -I../../linux/x86_64 -I../../linux \
	-I./linux  -Wall -Wwrite-strings -g -O2 -MT process.o -MD -MP \
	-MF .deps/process.Tpo -c -o process.o ../../process.c
In file included from ../../process.c:63:0:
/usr/include/linux/ptrace.h:58:8: error: redefinition of 'struct ptrace_peeksiginfo_args'
 struct ptrace_peeksiginfo_args {
        ^
In file included from ../../defs.h:159:0,
                 from ../../process.c:37:
/usr/include/sys/ptrace.h:191:8: note: originally defined here
 struct ptrace_peeksiginfo_args
        ^

Since this struct was introduced in glibc-2.18, there shouldn't be any
real regressions with adding the __ prefix.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2014-01-06 08:07:33 -05:00
Mike Frysinger cb8a6dbd17 rename configure.in to configure.ac
Autoconf has been deprecating configure.in for quite a long time.
Rename all our configure.in and preconfigure.in files to .ac.

Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2013-10-30 17:32:08 +10:00
Carlos O'Donell c61b4d41c9 BZ #15754: CVE-2013-4788
The pointer guard used for pointer mangling was not initialized for
static applications resulting in the security feature being disabled.
The pointer guard is now correctly initialized to a random value for
static applications. Existing static applications need to be
recompiled to take advantage of the fix.

The test tst-ptrguard1-static and tst-ptrguard1 add regression
coverage to ensure the pointer guards are sufficiently random
and initialized to a default value.
2013-09-23 00:52:09 -04:00
Andreas Schwab 5bb43a4319 Make __ffs hidden 2013-09-20 21:25:31 +02:00
Ondřej Bílka c0c3f78afb Fix typos. 2013-08-21 19:48:48 +02:00
Chris Metcalf 1fe2988f52 tile BZ #15759: Fix bug in _dl_unmap
We returned without calling __munmap if not in the simulator.
Now we call a separate sim_dlclose() function to make the
control flow work correctly.
2013-07-22 11:56:36 -04:00
Chris Metcalf 19a601f7b2 tile: add missing semicolon in <bits/ptrace.h>
Change 521c6785e1 added the enum but missed the semicolon.

Signed-off-by: Chris Metcalf <cmetcalf@tilera.com>
2013-07-19 13:06:30 -04:00
Chris Metcalf 95a4e1ea3b tile: use _dl_static_init to set GLRO(gl_pagesize)
A recently-added test (dlfcn/tststatic5) pointed out that tile was not
properly initializing the variable pagesize in certain cases.  This
change just copies the existing code from MIPS.
2013-07-07 11:33:25 -04:00
Chris Metcalf b68c223125 tile: update libm-test-ulps from scratch 2013-07-07 11:33:24 -04:00
Chris Metcalf 36002f0786 tile: use soft-fp for fma() and fmaf()
The sfp-machine.h is based on the gcc version, but extended with
required new macros by comparison with other architectures and by
investigating the hardware support for FP on tile.
2013-07-07 11:33:24 -04:00
Andreas Jaeger 521c6785e1 Sync sys/ptrace with Linux 3.10 2013-07-04 09:49:14 +02:00
Chris Metcalf 8145005c31 tile: switch to using <fenv.h> fallback functions
Now that the fallback functions match the desired semantics for tile
functions, just switch to using them.
2013-06-30 11:50:43 -04:00
Siddhesh Poyarekar 61dd6208fb New API to set default thread attributes
This patch introduces two new convenience functions to set the default
thread attributes used for creating threads.  This allows a programmer
to set the default thread attributes just once in a process and then
run pthread_create without additional attributes.
2013-06-15 12:24:15 +05:30
Chris Metcalf ad36ba2bd6 tile: default to little-endian in bits/endian.h
This turns out to be helpful when doing a from-scratch cross-compile of
gcc and glibc, since you can then do "make install-headers" in glibc
even before you have a functioning tile gcc.
2013-06-13 11:43:21 -04:00
Joseph Myers 5556231db2 Remove trailing whitespace in ports. 2013-06-05 20:26:40 +00:00
Siddhesh Poyarekar b937534868 Avoid crashing in LD_DEBUG when program name is unavailable
Resolves: #15465

The program name may be unavailable if the user application tampers
with argc and argv[].  Some parts of the dynamic linker caters for
this while others don't, so this patch consolidates the check and
fallback into a single macro and updates all users.
2013-05-29 21:34:12 +05:30
Chris Metcalf 86bd05fbc8 tile: improve detection for missing -mcmodel=large support
The existing test avoided passing -mcmodel=large if the compiler didn't
support it.  However, we need to test not just the compiler support, but
also the toolchain (as and ld) support, so make the test more complete.
In addition, we have to avoid using the hwN_plt() assembly operators if
that support is missing, so guard the uses with #ifdef NO_PLT_PCREL.

This allows us to properly build glibc with the current community
binutils, which doesn't yet have the PC-relative PLT operator support.
The -mcmodel=large support is in gcc 4.8, but the toolchain support
won't be present in the community until binutils 2.24.
2013-05-24 14:02:31 -04:00
Edjunior Barbosa Machado 85118d4de3 Update bits/siginfo.h with Linux hwpoison SIGBUS changes
Adds new SIGBUS error codes for hardware poison signals, syncing with
the current kernel headers (v3.9). It also adds si_trapno field for
alpha.
2013-05-22 14:19:49 -05:00
Joseph Myers b50a71810b Don't include expected results in libm-test test names. 2013-05-22 11:49:36 +00:00
Joseph Myers db62a90753 Handle sincos with generic libm-test logic. 2013-05-19 14:45:41 +00:00
Ryan S. Arnold e054f49430 Add #include <stdint.h> for uint[32|64]_t usage (except installed headers). 2013-05-16 11:32:54 -05:00
Andreas Schwab fb6b0fcbf1 Remove extra pthread_atfork compat symbols 2013-03-11 09:47:01 +01:00
Andreas Jaeger 72a3b700c5 Use bits/mman-linux.h for TILE
* sysdeps/unix/sysv/linux/tile/bits/mman.h: Remove all defines
	provided by bits/mman-linux.h and include <bits/mman-linux.h>.
2013-03-05 21:59:58 +01:00
Chris Metcalf fd6cdc6da4 tile: Add priority inheritance futex support 2013-02-28 18:07:33 -05:00
Siddhesh Poyarekar ba384f6ed9 C++11 thread_local destructors support
This feature is specifically for the C++ compiler to offload calling
thread_local object destructors on thread program exit, to glibc.
This is to overcome the possible complication of destructors of
thread_local objects getting called after the DSO in which they're
defined is unloaded by the dynamic linker.  The DSO is marked as
'unloadable' if it has a constructed thread_local object and marked as
'unloadable' again when all the constructed thread_local objects
defined in it are destroyed.
2013-02-18 19:08:21 +05:30
Chris Metcalf 176f2fe0a1 tilegx: fix ldd to work with both tilegx64 and tilegx32
This uses the same ldd-rewrite.sed hook as other platforms, with
the minor tweak that tilegx uses /lib (64-bit) and /lib32 (32-bit).
2013-01-10 10:16:06 -05:00
Joseph Myers 568035b787 Update copyright notices with scripts/update-copyrights. 2013-01-02 19:05:09 +00:00
Chris Metcalf fdfc65d21f tile: support lll_futex_timed_wait_bitset 2012-12-28 12:13:01 -05:00
Chris Metcalf 2bc2d8e823 tile: fix DWARF bug in clone() for created thread
Previously, we would see a bad frame in the gdb backtrace output, e.g.:

  (gdb) bt
  #0  foo () at foo.c:5
  #1  0x000000aaaab68ee8 in start_thread () from /lib/libpthread.so.0
  #2  0x000000aaaad01c88 in clone () from /lib/libc.so.6
  #3  0x0000000000000000 in ?? ()

With this change the bogus frame #3 is gone and we have the
same output as x86 does for the same program.
2012-12-21 15:29:55 -05:00
Chris Metcalf ebdcf03979 tile: remove redundant defines of libc_fetestexcept, etc. in s_fmaf.c 2012-11-29 11:17:29 -05:00
Chris Metcalf c10f7382a3 tile: update libm-test-ulps for new tests 2012-11-20 15:06:38 -05:00
Chris Metcalf 73deba6d3c tile: Fix __bswap_64 return type in tile bits/byteswap.h 2012-11-20 15:05:59 -05:00
Chris Metcalf 3d45177146 tile: remove redundant defines of libc_fetestexcept, etc. in s_fma.c 2012-11-20 15:05:32 -05:00
Chris Metcalf 87ae5e366e Update language in ChangeLog.tile. 2012-11-07 13:19:54 -05:00
Chris Metcalf fdf689a977 tile: use memcpy in memmove when possible 2012-11-06 22:19:31 -05:00
Chris Metcalf 351dc60c55 tile: use atomic op to unlock pthread_spinlock_t
Atomic ops are issued directly from the core, rather than
potentially sitting in the write buffer, so can improve the
performance of other waiters.  In addition, if we didn't end
up pulling a copy of the cache line where the lock is into cache,
by using an atomic op we don't have to acquire the cache line
before we can unlock.
2012-11-06 09:50:47 -05:00
Chris Metcalf a0bce338e8 Make ieee754 fma tolerate architectures without exception support. 2012-11-06 09:48:53 -05:00
Chris Metcalf fedff58953 tile: support very large shared objects
With gcc 4.8 tilegx has support for -mcmodel=large, to tolerate very
large shared objects.  This option changes the compiler output to
not include direct jump instructions, which have a range of only
2^30, i.e +/- 512MB.  Instead the compiler marshalls the target PCs
into registers and then uses jump- or call-to-register instructions.

For glibc, the upshot is that we need to arrange for a few functions
to tolerate the possibility of a large range between the PC and
the target.  In particular, the crti.S and start.S code needs
to be able to reach from .init to the PLT, as does gmon-start.c.
The elf-init.c code has the reverse problem, needing to call from
libc_nonshared.a (linked at the end of shared objects) back to the
_init section at the beginning.

No other functions in *_nonshared.a need to be built this way, as
they only call the PLT (or potentially each other), but all of that
code is linked at the very end of the shared object.

We don't build the standard -static archives with this option as the
performance cost is high enough and the use case is rare enough that
it doesn't seem worthwhile.  Instead, we would encourage developers
who need the -static model with huge executables to build a private
copy of glibc and configure it with -mcmodel=large.

Note that libc.so et al don't need any changes; the only changes
are for code that is statically linked into user code built with
-mcmodel=large.

For the assembly code, I just rewrote it so that it unconditionally
uses the large model.  To be able to pass -mcmodel=large to
csu/elf-init.c and csu/gmon-start.c, I need to check to see if the
compiler supports that flag, since gcc 4.7 doesn't; I added the
support by creating a small Makefile fragment that just runs the
compiler to check.
2012-11-06 09:48:49 -05:00
Chris Metcalf e7776fefa7 tile: improve simulator notification for relative paths in dlopen
Normally, the simulator is notified of absolute pathnames by the
_dl_load_hook hook.  However, when a relative pathname is used, the
simulator may not know that the relative path matches a path that
it could figure out in the file system that it has access to.
Instead we provide a simplified version of the realpath function
so we can pass a plausible absolute pathname to the simulator.

Since we're now doing more work at object load time, we also add
a guard so we do no work at all if we're not running on the simulator.
2012-11-06 09:24:44 -05:00
Chris Metcalf cd84016efe Optimize tile (mostly tilegx) memcpy and memmove performance.
- Override <memcopy.h> so we use full 8-byte word copies on tilegx32
  for memmove, then use op_t in memcpy instead of the previous
  locally-defined word_t just to avoid proliferating identical types.
- Fix bug in memcpy prefetch that caused us to never prefetch past
  the first cache line.
- Optimize misaligned memcpy by inlining _wordcopy_fwd_dest_aligned
  instead of just doing a dumb word-at-a-time copy.
- Make memcpy safe for forward copies by doing all the loads from
  a given cache line prior to doing a wh64 (cache line zero-fill)
  on the destination.  Remove now-redundant src == dst check.
- Copy and optimize the generic wordcopy.c routines to use the tile
  "double align" instruction instead of the MERGE macro; to avoid
  offset addressing mode (which tile doesn't have) by rewriting the
  pointer math to load and store with a zero index; and to use
  post-increment addresses in the inner loops to improve scheduling.
2012-11-06 09:24:19 -05:00
Joseph Myers fbeafedeea Make fenv.h FE_* macros usable in #if (bug 3439). 2012-11-03 17:07:56 +00:00
Chris Metcalf 0244426b93 tile: Account for new tests (missed test-double changes) 2012-11-03 08:46:09 -04:00
Chris Metcalf 47cc1490e0 Invoke DL_AFTER_LOAD if defined
This hook is useful for any arch-specific functionality that
should be done on loaded objects.  For the tile architecture,
the hook is already provided (though we switch to using the new
macro name with this commit) and implements a simulator notifier
so that the simulator can load Elf symbols to match the object
and generate better error messages for PC's.

Also, remove a spurious definition of DL_UNMAP in dl-runtime.c
2012-10-30 14:16:18 -04:00
Chris Metcalf d44a6f8b99 tile: improve ABI and #include use in gettimeofday vdso support 2012-10-30 14:11:54 -04:00
Chris Metcalf 5ff3789785 tile: update libm-test-ulps for new tests 2012-10-30 14:11:22 -04:00
Chris Metcalf d11260f86a tile: add vDSO support for gettimeofday() 2012-10-29 13:47:57 -04:00
Roland McGrath 6e6249d0b4 BZ#14743: Move clock_* symbols from librt to libc. 2012-10-24 14:50:46 -07:00
Chris Metcalf b8d7c0968c tilegx: add optimized sched_getcpu() using TILE_COORD SPR
We can discover our x,y coordinate in the core mesh with an
mfspr instruction, multiply y by the core mesh width, and have
the core number without needing to ask the kernel.
2012-10-12 14:26:25 -04:00