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2015-10-08xtensa: support call0 ABIMax Filippov
Most changes are mechanical replacement of 'retw' instruction with 'abi_ret' macro, defined to 'retw' or 'ret' according to ABI. Assembly code that makes calls is duplicated for call0 ABI with changed register numbers for parameters/return value and call instruction. 'entry' instructions are replaced with 'abi_entry' macro. More interesting changes: - non-leaf assembly functions (e.g. _dl_tlsdesc_dynamic, _dl_linux_resolve, SYSCALL_ERROR_HANDLER, PSEUDO) now need to preserve registers around intermediate calls they make, use temporary stack frame for that; - setjmp/longjmp only need to save and restore return address, stack pointer and callee-saved registers in the jmpbuf; - __clone and syscall functions had hardcoded offsets to parameter passed on stack, on call0 ABI they don't need stack frame, so the offset is different. Replace these offsets with FRAMESIZE macro. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
2015-03-08okay, chicken-egg-problem solved really now. (was xtensa no thread failure)Waldemar Brodkorb
2015-03-07should have test it better, fix non-thread compileWaldemar Brodkorb
2015-03-07fix non-thread compile for xtensaWaldemar Brodkorb
2015-01-26merge upstream changesWaldemar Brodkorb
2015-01-23xtensa: ldso: drop unused address calculation from _dl_linux_resolveMax Filippov
The result of the calculation in register a12 is never used as the function _dl_linux_resolver only accepts 2 arguments. Drop it. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2015-01-23xtensa: ldso: coalesce dl_mprotect address rangesMax Filippov
This noticeably lowers the number of mprotect calls at program startup, e.g. for busybox: 7 calls vs 1835 calls. Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2014-09-22xtensa: add support for NPTLWaldemar Brodkorb
Changes from: https://github.com/foss-xtensa/uClibc/commits/xtensa_nptl Author: Chris Zankel <chris@zankel.net> Author: Baruch Siach <baruch@tkos.co.il>
2014-04-01xtensa: add missing .literal_position directivesMax Filippov
This addition allows building uClibc with -mtext-section-literals Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2012-11-18Replace FSF snail mail address with URLsMike Frysinger
This matches a similar change made to glibc. No functional changes here. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2012-03-29ldso: mark _start hiddenMike Frysinger
There's no need to export this symbol, so mark them all hidden. Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2012-03-25ldso: use ELF_xxx()/ElfW() helpersMike Frysinger
They expand into the same code, but using the ELF_xxx()/ElfW() macros makes it much easier to spot similarities between code bases. Acked-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com> Acked-by: Carmelo Amoroso <carmelo.amoroso@st.com> Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-10-14ldso: silence harmless warning for !LDSO_PRELINK_SUPPORTBernhard Reutner-Fischer
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2011-10-06ldso: merge duplicate dl-syscalls.h code to common headerMike Frysinger
Signed-off-by: Mike Frysinger <vapier@gentoo.org> Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2011-10-01ldso: constify reloc array itselfMike Frysinger
Signed-off-by: Mike Frysinger <vapier@gentoo.org>
2011-01-21Merge remote branch 'origin/master' into prelinkCarmelo Amoroso
* origin/master: bump version to 0.9.32-rc2-git release 0.9.32-rc2 nptl: Fix __USER_LABEL_PREFIX__ concatenatio nptl: fix start_thread() for _STACK_GROWS_UP ldso: get rid of _dl_lookup_hash Add protected symbols support for all architectures Revert "ldso/arm: Correct protected symbol resolution" Revert "ldso_sh: add support for protected symbols to SH" Revert "ldso/i386: support protected symbols" cris: Fix build issues syslog: fix 'everyone logs with user facility' __psfs_parse_spec: always use long int for %p buildsys: headers target should not depend on sysnum.h buildsys: fix make release target nptl: get rid of the last preprocessor warning when __ASSUME_TGKILL is not defined remove uClibc_ctype.h if !LOCALE Revert "Makefile.in: Add header to 'all' target" nptl: get rid of preprocessor warning when __ASSUME_TGKILL is not defined Conflicts: ldso/include/dl-hash.h ldso/ldso/arm/elfinterp.c ldso/ldso/avr32/elfinterp.c ldso/ldso/bfin/elfinterp.c ldso/ldso/cris/elfinterp.c ldso/ldso/dl-hash.c ldso/ldso/i386/elfinterp.c ldso/ldso/m68k/elfinterp.c ldso/ldso/mips/elfinterp.c ldso/ldso/powerpc/elfinterp.c ldso/ldso/sh/elfinterp.c ldso/ldso/sh64/elfinterp.c ldso/ldso/sparc/elfinterp.c ldso/ldso/x86_64/elfinterp.c ldso/ldso/xtensa/elfinterp.c ldso/libdl/libdl.c Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
2011-01-20Add protected symbols support for all architecturesSalvatore Cro
Protected symbols are global symbols for which interposition is not allowed. We manage them in generic _dl_lookup_hash function. To handle protected symbols we need to get a reference to the module that defines the symbol itself. So we pass a new parameter 'struct symbol_ref' to the __dl_lookup_hash that is defined as below: struct symbol_ref { const ElfW(Sym) *sym; struct elf_resolve *tpnt; }; The tpnt field is used as an ouput parameter and refers to the module which defines the protected symbol. Further it can be used as output parameter for TLS relocations and FDPIC case. The sym field is instead used as an input parameter to detect the visibility of the symbol we are looking-up. In this way we get rid of different signatures for _dl_lookup_hash, allowing to remove the _dl_find_hash wrapper. This new structure is also suitable for prelink integration. Signed-off-by: Salvatore Cro <salvatore.cro@st.com> Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
2010-10-11ldso: Extend prelink support for all other achitecturesFilippo Arcidiacono
Update Arch specific part of the dynamic linker to the latest cahnges required by prelink: - Use _dl_loaded_modules->scope as global symbol scope - Pass the sym argument (or NULL) to the _dl_find_hash - Update _dl_parse, _dl_do_reloc, _dl_do_lazy_reloc and _dl_parse_relocation_information to reflect the change of the scope argument's type - Add the call to _dl_debug_lookup used for trace prelinking. Signed-off-by: Filippo Arcidiacono <filippo.arcidiacono@st.com> Signed-off-by: Carmelo Amoroso <carmelo.amoroso@st.com>
2009-11-15ldso: Add missing newlines to some debug messagesBernhard Reutner-Fischer
Signed-off-by: Bernhard Reutner-Fischer <rep.dot.nop@gmail.com>
2009-10-14ldso: fixup all the rest of the calls to _dl_find_hashAustin Foxley
With TLS _dl_find_hash grew an extra param. These archs don't have TLS reloc support yet, but they do need to compile without it. Signed-off-by: Austin Foxley <austinf@cetoncorp.com>
2009-03-05Use __always_inline instead of __inline__Carmelo Amoroso
2009-01-28Remove check for the relocation type check in the resolver,Carmelo Amoroso
from all archs. Signed-off-by: Jiri Olsa <olsajiri@gmail.com>
2009-01-14ldso: performs bootstrap relocations only if required by the arch.Carmelo Amoroso
It is controlled by ARCH_NEEDS_BOOTSTRAP_RELOCS macro. Signed-off-by: Jirka <olsajiri@gmail.com> Acked-by: Carmelo Amoroso <carmelo.amoroso@st.com>
2008-12-03- Use runtime pagesize (Jeremy Kerr)Bernhard Reutner-Fischer
Some powerpc machines can support 64k pages, enabled by the CONFIG_64K_PAGES option in linux. However, the uClibc dynamic loader won't currently work on these machines, as it uses hard-coded values (PAGE_ALIGN, ADDR_ALIGN and OFFS_ALIGN) in the ldso architecture-specific headers. When running on a kernel with 64k pages, ld.so tries to mmap with 4k-aligned addresses, rather than 64k, so mmap fails with -EINVAL. When booting a 64k machine with a uClibc dynamic linker, init fails with: /init:500: can't map '/lib/libc.so.0' /init:500: can't map '/lib/libc.so.0' /init:500: can't map '/lib/libc.so.0' /init: can't load library 'libc.so.0' Kernel panic - not syncing: Attempted to kill init! This change allows ld.so determine these alignment masks at runtime, rather than compile-time. Since we have the _dl_pagesize variable available, we can use that to generate the appropriate masks. Since almost all of the architectures can use the common definitions for the _ALIGN macros, we can consolidate them all in ldso.h, and override in the sysdep headers where necessary (ie, mips). This allows me to start a uClibc-based root fs on a 64k machine. Signed-off-by: Jeremy Kerr <jk at ozlabs org>
2008-09-13xtensa: Stack unwinding on Xtensa requires that the return address register ↵Chris Zankel
always be valid. This patch fixes a part of ldso that had been using an Xtensa CALL0 instruction to get the current PC value, which temporarily clobbered the return address register. The revised code just loads the address of a label in the code. See my change to GCC from 2007-12-20 for more info (http://gcc.gnu.org/ml/gcc-patches/2007-12/msg01023.html).
2008-07-23- trim any trailing whitespaceBernhard Reutner-Fischer
2008-07-23- fix inline keywordBernhard Reutner-Fischer
2008-01-05Chris Zankel writes:Mike Frysinger
The following patches add support for the Xtensa processor architecture to uClibc. They are based on a recent SVN checkout (12/05/2007). The first patch (attached to this post) adds Xtensa support to various shared configuration and make files. The following patches then include the Xtensa specific files and directories. I welcome any feedback and would appreciate it if you could include the patches into the mainline tree. I am certainly committed to maintain the port. Bob Wilson was kind enough to review the patches. Some notes about the architecture: Xtensa is a configurable and extensible processor architecture developed by Tensilica. For more information, please visit: www.linux-xtensa.org.
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