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On C6X, the stack pointer points to a word that is not part of the current
function's stack frame. It may be overwritten by callees. Take this into
account when creating the stack for a cloned thread.
Signed-off-by: Bernd Schmidt <bernds@codesourcery.com>
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This adds support for a new binary format, DSBT ELF, to the Makefiles.
Every shared library is assigned a DSBT index, and the link.so macro is
adjusted to ensure the correct linker argument is passed.
Configuration and ldso support will follow in separate commits.
Signed-off-by: Bernd Schmidt <bernds@codesourcery.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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STRICT_HEADERS
Remove ucontext.h if SUSV4_LEGACY is not set and fix it's references.
Guard sigstack structure with SUSV4_LEGACY and STRICT_HEADERS.
Disable sigstack function prototype, it is not provided by uClibc.
Signed-off-by: Peter S. Mazinger <ps.m@gmx.net>
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Because the nommu address space is flat, and the application stack can
literally be located anywhere, we cannot rely on the assumptions that the
mmu port gets away with. Namely, that the first thread's stack lives at
the top of memory and nothing will be created above it.
Currently, the code rounds the current stack up a page and sets that as
the "top" of the stack, and then marks the "bottom" of the stack as "1".
Then as new threads are created, this assumption is further refined by
slowly backing off the "bottom" when a new stack is created within the
range of the initial stack.
Simple ascii example (tid0 is the initial thread):
1 thread:
[bos tid0 stack tos]
2 threads:
[ tid0 stack ]
[tid1 stack]
3 threads:
[ tid0 stack ]
[tid1 stack]
[tid2 stack]
As you can kind of see, this algorithm operates on one basic assumption:
the initial top of stack calculation is the absolute top of the stack.
While this assumption was fairly safe in the original nommu days of yore
where the only file format was FLAT (which defaults to a 4KiB stack --
exactly 1 page), and memory was fairly tight, we can see that this falls
apart pretty quickly as soon as the initial stack is larger than a page.
The issue that crops up now is simple to hit: start an application with
an 8KiB stack, execute some functions that put pressure on the stack so
that it exceeds 4KiB, then start up some threads. The initial tos will
be rounded up by a page, but this is actually the middle of the stack.
Now when the initial thread returns from its functions (thus unwinding
the stack) and tries to call something which calls back into libpthread,
the thread_self() func fails to detect itself as the initial thread as
the current stack is now above the tos. The __pthread_find_self() func
kicks in, walks all the thread arrays, fails to find a hit, and then
walks into uninitialized memory for the thread descriptor. Use of this
garbage memory has obvious results -- things fall down & go boom.
To address this, I extend the current algorithm to automatically scale
back both the bottom and the top stack limits of the initial thread.
We use the current stack pointer at "thread boot time" only as a single
known point. The initial thread stack bottom is set to the bottom of
memory and the initial thread stack top is set to the top of memory.
Then as we create new stack threads, we figure out whether the new stack
is above or below the single known good address, and then scale back
either the tos or the bos accordingly.
Reviewed-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Header files needed to build linuxthreads.old for microblaze.
Signed-off-by: Steven J. Magnani <steve@digidescorp.com>
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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also sync up not-cancel.h headers between all three thread libraries
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
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Since sublevel releases are not ABI compatible we need to adjust
the soname to include the sublevel version.
This makes it possible to install ABI incompatible versions of the
library side by side so clean upgrades are possible.
Signed-off-by: Natanael Copa <natanael.copa@gmail.com>
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
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Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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This patch will convert all the #ifdef USE_TLS and #if USE_TLS to
#if defined(USE_TLS) && USE_TLS.
By checking if the USE_TLS is defined before checking its value will result in
correct behavior for architectures not defining this config symbol.
Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Acked-by: Carmelo AMOROSO <carmelo.amoroso@st.com>
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This reverts commit e0ac4efbdb498319f03a2a95d75d061ab6c68491.
Was causing segfaults on every pthread linked executable
Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
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A lot of libc code calls the pthread cleanup funcs implicitly (for stdio)
which currently goes through the PLT. Since we already have forwarding
symbols for these funcs, it's safe to declare the internal libc usage
hidden as a loaded libpthread will have the real symbols found.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
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sed -i -e '/Experimentally off - /d' $(grep -rl "Experimentally off - " *)
sed -i -e '/^\/\*[[:space:]]*libc_hidden_proto(/d' $(grep -rl "libc_hidden_proto" *)
should be a nop
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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Handle O=
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
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The pthread_yield() function in linuxthreads does the same thing as the
standardized sched_yield() function, so add a simple define for it to make
porting GNU apps easier.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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If pthread_join() is called and there is nothing to join, then the debug
code will attempt to dereference a NULL pointer.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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The libc_pthread_init.c needs the include workaround like forward.c, and
forward.c needs more includes now.
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Signed-off-by: Ron Lee <ron@debian.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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Once again all of these reduce the noise from gcc-4.4.
Replaces a few more (USE_TLS && HAVE___THREAD) with USE___THREAD while we need
to mess with them for this anyhow.
Signed-off-by: Ron Lee <ron@debian.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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This cuts down on a lot of noise from gcc-4.4
Signed-off-by: Ron Lee <ron@debian.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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usage() is also made static in answer to warnings about no prototype.
In __pthread_manager_event() we also have to drop the return statement,
else gcc will in turn complain about a non-returning function having one.
Signed-off-by: Ron Lee <ron@debian.org>
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
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M5485 processor
1. Disable mmap2() if we're compiling for coldfire and fall back to mmap().
It seems to map a different file area on a 2.6.25 linux kernel.
2. Uses pc-relative addresing[1], computes ADDR_ALIGN, PAGE_ALIGN
and OFFSET_ALIGN relatively to _dl_pagesize[3].
On coldfire/M5485 _dl_pagesize is 0x2000.
Signed-off-by: Groleo Marius <groleo@gmail.com>
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Now they are only enabled if linuxthreads.old are selected.
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implemented anyway.
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warning: type defaults to 'int' in declaration of 'intfcntl'
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__libc_accept __libc_close __libc_connect __libc_creat __libc_creat64
__libc_fsync __libc_lseek __libc_lseek64 __libc_msync __libc_nanosleep
__libc_open __libc_open64 __libc_pause __libc_read __libc_readv
__libc_recv __libc_recvfrom __libc_recvmsg
__libc_send __libc_sendmsg __libc_sendto
__libc_tcdrain __libc_wait __libc_waitpid __libc_write __libc_writev
They were removed from glibc 1 May 2004:
http://sources.redhat.com/ml/libc-hacker/2004-05/msg00001.html
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*: remove checks of sigaction and sigprocmask results
in cases where they clearly can't fail:
sigaction(known_good_sig)
sigprocmask(known_good_how)
text data bss dec hex filename
- 393 4 0 397 18d libc/pwd_grp/lckpwdf.o
+ 382 4 0 386 182 libc/pwd_grp/lckpwdf.o
- 56 0 0 56 38 libc/signal/sigblock.o
+ 44 0 0 44 2c libc/signal/sigblock.o
- 211 0 0 211 d3 libc/signal/sigset.o
+ 202 0 0 202 ca libc/signal/sigset.o
- 56 0 0 56 38 libc/signal/sigsetmask.o
+ 44 0 0 44 2c libc/signal/sigsetmask.o
- 309 0 0 309 135 libc/unistd/sleep.o
+ 256 0 0 256 100 libc/unistd/sleep.o
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text data bss dec hex filename
- 1179 13 2 1194 4aa libc/misc/syslog/syslog.o
+ 1165 13 2 1180 49c libc/misc/syslog/syslog.o
- 435 4 0 439 1b7 libc/pwd_grp/lckpwdf.o
+ 393 4 0 397 18d libc/pwd_grp/lckpwdf.o
- 38 0 0 38 26 libc/signal/sigandset.o
+ 32 0 0 32 20 libc/signal/sigandset.o
- 63 0 0 63 3f libc/signal/sigblock.o
+ 56 0 0 56 38 libc/signal/sigblock.o
- 22 0 0 22 16 libc/signal/sigempty.o
+ 20 0 0 20 14 libc/signal/sigempty.o
- 25 0 0 25 19 libc/signal/sigfillset.o
+ 20 0 0 20 14 libc/signal/sigfillset.o
- 34 0 0 34 22 libc/signal/sigisempty.o
+ 16 0 0 16 10 libc/signal/sigisempty.o
- 38 0 0 38 26 libc/signal/sigorset.o
+ 32 0 0 32 20 libc/signal/sigorset.o
- 119 0 0 119 77 libc/signal/sigpause.o
+ 113 0 0 113 71 libc/signal/sigpause.o
- 215 0 0 215 d7 libc/signal/sigset.o
+ 211 0 0 211 d3 libc/signal/sigset.o
- 63 0 0 63 3f libc/signal/sigsetmask.o
+ 56 0 0 56 38 libc/signal/sigsetmask.o
- 194 0 1 195 c3 libc/stdlib/abort.o
+ 183 0 1 184 b8 libc/stdlib/abort.o
- 323 0 0 323 143 libc/unistd/sleep.o
+ 309 0 0 309 135 libc/unistd/sleep.o
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gcc?
text data bss dec hex filename
- 38015 18096 8636 64747 fceb lib/libpthread-0.9.30-svn.so
+ 38001 18096 8636 64733 fcdd lib/libpthread-0.9.30-svn.so
- 274842 1835 19012 295689 48309 lib/libuClibc-0.9.30-svn.so
+ 274779 1835 19012 295626 482ca lib/libuClibc-0.9.30-svn.so
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linuxthreads.old/manager: pointless style fixes, no code changes
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This patch replaces inline with __inline__ to be more ANSI compatible.
Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
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Previously the old headers were left in include/ leading to spurious compile failures.
This is ugly as it can get (we resort to sneaking -L in for the moment) but
good enough for now. The worst thing which can happen is that we ln these
headers once per invocation of make, nothing more.
If some installation of make(1) complains about the "-L" then wrap it in
ifneq ($(findstring check-symlink,$(.FEATURES)),)
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Thank you Chase Douglas for reporting it and for the patch.
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Closes issue #5194
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Remove all other duplicated definitions.
Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
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common case depends on __ARCH_USE_MMU__, falling back on the
include/sys/mman.h:msync() stub otherwise.
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