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2017-01-01Update copyright dates with scripts/update-copyrights.Joseph Myers
2016-12-26Initialize the stack guard earlier when linking statically [BZ #7065]Nick Alcock
The address of the stack canary is stored in a per-thread variable, which means that we must ensure that the TLS area is intialized before calling any -fstack-protector'ed functions. For dynamically linked applications, we ensure this (in a later patch) by disabling -fstack-protector for the whole dynamic linker, but for static applications, the AT_ENTRY address is called directly by the kernel, so we must deal with the problem differently. In static appliations, __libc_setup_tls performs the TCB setup and TLS initialization, so this commit arranges for it to be called early and unconditionally. The call (and the stack guard initialization) is before the DL_SYSDEP_OSCHECK hook, which if set will probably call functions which are stack-protected (it does on Linux and NaCL too). We also move apply_irel up, so that we can still safely call functions that require ifuncs while in __libc_setup_tls (though if stack-protection is enabled we still have to avoid calling functions that are not stack-protected at this stage).
2016-12-21Remove unused function _dl_tls_setupFlorian Weimer
Commit 7a5e3d9d633c828d84a9535f26b202a6179978e7 (elf: Assume TLS is initialized in _dl_map_object_from_fd) removed the last call of _dl_tls_setup, but did not remove the function itself.
2016-11-30Implement _dl_catch_error, _dl_signal_error in libc.so [BZ #16628]Florian Weimer
This change moves the main implementation of _dl_catch_error, _dl_signal_error to libc.so, where TLS variables can be used directly. This removes a writable function pointer from the rtld_global variable. For use during initial relocation, minimal implementations of these functions are provided in ld.so. These are eventually interposed by the libc.so implementations. This is implemented by compiling elf/dl-error-skeleton.c twice, via elf/dl-error.c and elf/dl-error-minimal.c. As a side effect of this change, the static version of dl-error.c no longer includes support for the _dl_signal_cerror/_dl_receive_error mechanism because it is only used in ld.so.
2016-07-01Treat STV_HIDDEN and STV_INTERNAL symbols as STB_LOCALMaciej W. Rozycki
In a reference to PR ld/19908 make ld.so respect symbol export classes aka visibility and treat STV_HIDDEN and STV_INTERNAL symbols as local, preventing such symbols from preempting exported symbols. According to the ELF gABI[1] neither STV_HIDDEN nor STV_INTERNAL symbols are supposed to be present in linked binaries: "A hidden symbol contained in a relocatable object must be either removed or converted to STB_LOCAL binding by the link-editor when the relocatable object is included in an executable file or shared object." "An internal symbol contained in a relocatable object must be either removed or converted to STB_LOCAL binding by the link-editor when the relocatable object is included in an executable file or shared object." however some GNU binutils versions produce such symbols in some cases. PR ld/19908 is one and we also have this note in scripts/abilist.awk: so clearly there is linked code out there which contains such symbols which is prone to symbol table misinterpretation, and it'll be more productive if we handle this gracefully, under the Robustness Principle: "be liberal in what you accept, and conservative in what you produce", especially as this is a simple (STV_HIDDEN|STV_INTERNAL) => STB_LOCAL mapping. References: [1] "System V Application Binary Interface - DRAFT - 24 April 2001", The Santa Cruz Operation, Inc., "Symbol Table", <http://www.sco.com/developers/gabi/2001-04-24/ch4.symtab.html> * sysdeps/generic/ldsodefs.h (dl_symbol_visibility_binds_local_p): New inline function. * elf/dl-addr.c (determine_info): Treat hidden and internal symbols as local. * elf/dl-lookup.c (do_lookup_x): Likewise. * elf/dl-reloc.c (RESOLVE_MAP): Likewise.
2016-04-10Fix crash on getauxval call without HAVE_AUX_VECTORSamuel Thibault
* sysdeps/generic/ldsodefs.h (struct rtld_global_ro) [!HAVE_AUX_VECTOR]: Do not define _dl_auxv field. * misc/getauxval.c (__getauxval) [!HAVE_AUX_VECTOR]: Do not go through GLRO(dl_auxv) list.
2016-01-04Update copyright dates with scripts/update-copyrights.Joseph Myers
2015-10-15Mark _dl_catch_error hiddenH.J. Lu
Since _dl_catch_error is only used internally in ld.so, it should be declared in sysdeps/generic/ldsodefs.h, not include/dlfcn.h and it can be made hidden. [BZ #19122] * include/dlfcn.h (_dl_catch_error): Moved to ... * sysdeps/generic/ldsodefs.h (_dl_catch_error): Add attribute_hidden.
2015-10-15Mark internal _dl_XXX functions hiddenH.J. Lu
Since internal _dl_XXX functions are only used internally in ld.so, they can be made hidden. [BZ #19122] * elf/dl-runtime.c (_dl_fixup): Add attribute_hidden. * elf/dynamic-link.h (_dl_try_allocate_static_tls): Likewise. * sysdeps/generic/dl-cache.h (_dl_cache_libcmp): Likewise. * sysdeps/generic/ldsodefs.h (_dl_name_match_p): Likewise. (_dl_higher_prime_number): Likewise. (_dl_debug_printf_c): Likewise. (_dl_signal_cerror): Likewise. (_dl_receive_error): Likewise. (_dl_reloc_bad_type): Likewise. (_dl_resolve_conflicts): Likewise. (_dl_check_all_versions): Likewise. (_dl_check_map_versions): Likewise. (_dl_sort_fini): Likewise. (_dl_debug_initialize): Likewise. (_dl_init_paths): Likewise. (_dl_show_auxv): Likewise. (_dl_next_ld_env_entry): Likewise. (_dl_important_hwcaps): Likewise. (_dl_load_cache_lookup): Likewise. (_dl_update_slotinfo): Likewise. (_dl_show_scope): Likewise.
2015-10-15Always enable pointer guard [BZ #18928]Florian Weimer
Honoring the LD_POINTER_GUARD environment variable in AT_SECURE mode has security implications. This commit enables pointer guard unconditionally, and the environment variable is now ignored. [BZ #18928] * sysdeps/generic/ldsodefs.h (struct rtld_global_ro): Remove _dl_pointer_guard member. * elf/rtld.c (_rtld_global_ro): Remove _dl_pointer_guard initializer. (security_init): Always set up pointer guard. (process_envvars): Do not process LD_POINTER_GUARD.
2015-09-08Move bits/libc-lock.h and bits/libc-lockP.h out of bits/ (bug 14912).Joseph Myers
It was noted in <https://sourceware.org/ml/libc-alpha/2012-09/msg00305.html> that the bits/*.h naming scheme should only be used for installed headers. This patch renames bits/libc-lock.h to plain libc-lock.h and bits/libc-lockP.h to plain libc-lockP.h to follow that convention. Note that I don't know where libc-lockP.h comes from for Hurd (the Hurd libc-lock.h includes libc-lockP.h, but the only libc-lockP.h in the glibc source tree is for NPTL) - some unmerged patch? - but I updated the #include in the Hurd libc-lock.h anyway. Tested for x86_64 (testsuite, and that installed stripped shared libraries are unchanged by the patch). [BZ #14912] * bits/libc-lock.h: Move to ... * sysdeps/generic/libc-lock.h: ...here. (_BITS_LIBC_LOCK_H): Rename macro to _LIBC_LOCK_H. * sysdeps/mach/hurd/bits/libc-lock.h: Move to ... * sysdeps/mach/hurd/libc-lock.h: ...here. (_BITS_LIBC_LOCK_H): Rename macro to _LIBC_LOCK_H. [_LIBC]: Include <libc-lockP.h> instead of <bits/libc-lockP.h>. * sysdeps/mach/bits/libc-lock.h: Move to ... * sysdeps/mach/libc-lock.h: ...here. (_BITS_LIBC_LOCK_H): Rename macro to _LIBC_LOCK_H. * sysdeps/nptl/bits/libc-lock.h: Move to ... * sysdeps/nptl/libc-lock.h: ...here. (_BITS_LIBC_LOCK_H): Rename macro to _LIBC_LOCK_H. * sysdeps/nptl/bits/libc-lockP.h: Move to ... * sysdeps/nptl/libc-lockP.h: ...here. (_BITS_LIBC_LOCKP_H): Rename macro to _LIBC_LOCKP_H. * crypt/crypt_util.c: Include <libc-lock.h> instead of <bits/libc-lock.h>. * dirent/scandir-tail.c: Likewise. * dlfcn/dlerror.c: Likewise. * elf/dl-close.c: Likewise. * elf/dl-iteratephdr.c: Likewise. * elf/dl-lookup.c: Likewise. * elf/dl-open.c: Likewise. * elf/dl-support.c: Likewise. * elf/dl-writev.h: Likewise. * elf/rtld.c: Likewise. * grp/fgetgrent.c: Likewise. * gshadow/fgetsgent.c: Likewise. * gshadow/sgetsgent.c: Likewise. * iconv/gconv_conf.c: Likewise. * iconv/gconv_db.c: Likewise. * iconv/gconv_dl.c: Likewise. * iconv/gconv_int.h: Likewise. * iconv/gconv_trans.c: Likewise. * include/link.h: Likewise. * inet/getnameinfo.c: Likewise. * inet/getnetgrent.c: Likewise. * inet/getnetgrent_r.c: Likewise. * intl/bindtextdom.c: Likewise. * intl/dcigettext.c: Likewise. * intl/finddomain.c: Likewise. * intl/gettextP.h: Likewise. * intl/loadmsgcat.c: Likewise. * intl/localealias.c: Likewise. * intl/textdomain.c: Likewise. * libidn/idn-stub.c: Likewise. * libio/libioP.h: Likewise. * locale/duplocale.c: Likewise. * locale/freelocale.c: Likewise. * locale/newlocale.c: Likewise. * locale/setlocale.c: Likewise. * login/getutent_r.c: Likewise. * login/getutid_r.c: Likewise. * login/getutline_r.c: Likewise. * login/utmp-private.h: Likewise. * login/utmpname.c: Likewise. * malloc/mtrace.c: Likewise. * misc/efgcvt.c: Likewise. * misc/error.c: Likewise. * misc/fstab.c: Likewise. * misc/getpass.c: Likewise. * misc/mntent.c: Likewise. * misc/syslog.c: Likewise. * nis/nis_call.c: Likewise. * nis/nis_callback.c: Likewise. * nis/nss-default.c: Likewise. * nis/nss_compat/compat-grp.c: Likewise. * nis/nss_compat/compat-initgroups.c: Likewise. * nis/nss_compat/compat-pwd.c: Likewise. * nis/nss_compat/compat-spwd.c: Likewise. * nis/nss_nis/nis-alias.c: Likewise. * nis/nss_nis/nis-ethers.c: Likewise. * nis/nss_nis/nis-grp.c: Likewise. * nis/nss_nis/nis-hosts.c: Likewise. * nis/nss_nis/nis-network.c: Likewise. * nis/nss_nis/nis-proto.c: Likewise. * nis/nss_nis/nis-pwd.c: Likewise. * nis/nss_nis/nis-rpc.c: Likewise. * nis/nss_nis/nis-service.c: Likewise. * nis/nss_nis/nis-spwd.c: Likewise. * nis/nss_nisplus/nisplus-alias.c: Likewise. * nis/nss_nisplus/nisplus-ethers.c: Likewise. * nis/nss_nisplus/nisplus-grp.c: Likewise. * nis/nss_nisplus/nisplus-hosts.c: Likewise. * nis/nss_nisplus/nisplus-initgroups.c: Likewise. * nis/nss_nisplus/nisplus-network.c: Likewise. * nis/nss_nisplus/nisplus-proto.c: Likewise. * nis/nss_nisplus/nisplus-pwd.c: Likewise. * nis/nss_nisplus/nisplus-rpc.c: Likewise. * nis/nss_nisplus/nisplus-service.c: Likewise. * nis/nss_nisplus/nisplus-spwd.c: Likewise. * nis/ypclnt.c: Likewise. * nptl/libc_pthread_init.c: Likewise. * nss/getXXbyYY.c: Likewise. * nss/getXXent.c: Likewise. * nss/getXXent_r.c: Likewise. * nss/nss_db/db-XXX.c: Likewise. * nss/nss_db/db-netgrp.c: Likewise. * nss/nss_db/nss_db.h: Likewise. * nss/nss_files/files-XXX.c: Likewise. * nss/nss_files/files-alias.c: Likewise. * nss/nsswitch.c: Likewise. * posix/regex_internal.h: Likewise. * posix/wordexp.c: Likewise. * pwd/fgetpwent.c: Likewise. * resolv/res_hconf.c: Likewise. * resolv/res_libc.c: Likewise. * shadow/fgetspent.c: Likewise. * shadow/lckpwdf.c: Likewise. * shadow/sgetspent.c: Likewise. * socket/opensock.c: Likewise. * stdio-common/reg-modifier.c: Likewise. * stdio-common/reg-printf.c: Likewise. * stdio-common/reg-type.c: Likewise. * stdio-common/vfprintf.c: Likewise. * stdio-common/vfscanf.c: Likewise. * stdlib/abort.c: Likewise. * stdlib/cxa_atexit.c: Likewise. * stdlib/fmtmsg.c: Likewise. * stdlib/random.c: Likewise. * stdlib/setenv.c: Likewise. * string/strsignal.c: Likewise. * sunrpc/auth_none.c: Likewise. * sunrpc/bindrsvprt.c: Likewise. * sunrpc/create_xid.c: Likewise. * sunrpc/key_call.c: Likewise. * sunrpc/rpc_thread.c: Likewise. * sysdeps/arm/backtrace.c: Likewise. * sysdeps/generic/ldsodefs.h: Likewise. * sysdeps/generic/stdio-lock.h: Likewise. * sysdeps/generic/unwind-dw2-fde.c: Likewise. * sysdeps/i386/backtrace.c: Likewise. * sysdeps/ieee754/ldbl-opt/nldbl-compat.c: Likewise. * sysdeps/m68k/backtrace.c: Likewise. * sysdeps/mach/hurd/cthreads.c: Likewise. * sysdeps/mach/hurd/dirstream.h: Likewise. * sysdeps/mach/hurd/malloc-machine.h: Likewise. * sysdeps/nptl/malloc-machine.h: Likewise. * sysdeps/nptl/stdio-lock.h: Likewise. * sysdeps/posix/dirstream.h: Likewise. * sysdeps/posix/getaddrinfo.c: Likewise. * sysdeps/posix/system.c: Likewise. * sysdeps/pthread/aio_suspend.c: Likewise. * sysdeps/s390/s390-32/backtrace.c: Likewise. * sysdeps/s390/s390-64/backtrace.c: Likewise. * sysdeps/unix/sysv/linux/check_pf.c: Likewise. * sysdeps/unix/sysv/linux/if_index.c: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/getutent_r.c: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/getutid_r.c: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/getutline_r.c: Likewise. * sysdeps/unix/sysv/linux/shm-directory.c: Likewise. * sysdeps/unix/sysv/linux/system.c: Likewise. * sysdeps/x86_64/backtrace.c: Likewise. * time/alt_digit.c: Likewise. * time/era.c: Likewise. * time/tzset.c: Likewise. * wcsmbs/wcsmbsload.c: Likewise. * nptl/tst-initializers1.c (do_test): Refer to <libc-lock.h> instead of <bits/libc-lock.h> in comment.
2015-03-31Add ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA to x86H.J. Lu
With copy relocation, address of protected data defined in the shared library may be external. When there is a relocation against the protected data symbol within the shared library, we need to check if we should skip the definition in the executable copied from the protected data. This patch adds ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA and defines it for x86. If ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA isn't 0, do_lookup_x will skip the data definition in the executable from copy reloc. [BZ #17711] * elf/dl-lookup.c (do_lookup_x): When UNDEF_MAP is NULL, which indicates it is called from do_lookup_x on relocation against protected data, skip the data definion in the executable from copy reloc. (_dl_lookup_symbol_x): Pass ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA, instead of ELF_RTYPE_CLASS_PLT, to do_lookup_x for EXTERN_PROTECTED_DATA relocation against STT_OBJECT symbol. * sysdeps/generic/ldsodefs.h * (ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA): New. Defined to 4 if DL_EXTERN_PROTECTED_DATA is defined, otherwise to 0. * sysdeps/i386/dl-lookupcfg.h (DL_EXTERN_PROTECTED_DATA): New. * sysdeps/i386/dl-machine.h (elf_machine_type_class): Set class to ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA for R_386_GLOB_DAT. * sysdeps/x86_64/dl-lookupcfg.h (DL_EXTERN_PROTECTED_DATA): New. * sysdeps/x86_64/dl-machine.h (elf_machine_type_class): Set class to ELF_RTYPE_CLASS_EXTERN_PROTECTED_DATA for R_X86_64_GLOB_DAT.
2015-01-21Fix recursive dlopen.Carlos O'Donell
The ability to recursively call dlopen is useful for malloc implementations that wish to load other dynamic modules that implement reentrant/AS-safe functions to use in their own implementation. Given that a user malloc implementation may be called by an ongoing dlopen to allocate memory the user malloc implementation interrupts dlopen and if it calls dlopen again that's a reentrant call. This patch fixes the issues with the ld.so.cache mapping and the _r_debug assertion which prevent this from working as expected. See: https://sourceware.org/ml/libc-alpha/2014-12/msg00446.html
2015-01-02Update copyright dates with scripts/update-copyrights.Joseph Myers
2014-11-24Remove IS_IN_rtldSiddhesh Poyarekar
Replace with IS_IN (rtld). Generated code is unchanged on x86_64. * elf/Makefile (CPPFLAGS-.os): Remove IS_IN_rtld. * elf/dl-open.c: Use IS_IN (rtld) instead if IS_IN_rtld. * elf/rtld-Rules: Likewise. * elf/setup-vdso.h: Likewise. * include/assert.h: Likewise. * include/bits/stdlib-float.h: Likewise. * include/errno.h: Likewise. * include/sys/stat.h: Likewise. * include/unistd.h: Likewise. * sysdeps/aarch64/setjmp.S: Likewise. * sysdeps/alpha/setjmp.S: Likewise. * sysdeps/arm/__longjmp.S: Likewise. * sysdeps/arm/aeabi_unwind_cpp_pr1.c: Likewise. * sysdeps/arm/setjmp.S: Likewise. * sysdeps/arm/sysdep.h: Likewise. * sysdeps/generic/_itoa.h: Likewise. * sysdeps/generic/dl-sysdep.h: Likewise. * sysdeps/generic/ldsodefs.h: Likewise. * sysdeps/i386/dl-tls.h: Likewise. * sysdeps/i386/setjmp.S: Likewise. * sysdeps/m68k/setjmp.c: Likewise. * sysdeps/mach/hurd/dl-execstack.c: Likewise. * sysdeps/mach/hurd/opendir.c: Likewise. * sysdeps/posix/getcwd.c: Likewise. * sysdeps/posix/opendir.c: Likewise. * sysdeps/posix/profil.c: Likewise. * sysdeps/powerpc/dl-procinfo.h: Likewise. * sysdeps/powerpc/powerpc32/fpu/__longjmp-common.S: Likewise. * sysdeps/powerpc/powerpc32/fpu/setjmp-common.S: Likewise. * sysdeps/powerpc/powerpc32/power4/multiarch/init-arch.h: Likewise. * sysdeps/powerpc/powerpc32/setjmp-common.S: Likewise. * sysdeps/powerpc/powerpc64/__longjmp-common.S: Likewise. * sysdeps/powerpc/powerpc64/setjmp-common.S: Likewise. * sysdeps/s390/dl-tls.h: Likewise. * sysdeps/s390/s390-32/setjmp.S: Likewise. * sysdeps/s390/s390-64/setjmp.S: Likewise. * sysdeps/sh/sh3/setjmp.S: Likewise. * sysdeps/sh/sh4/setjmp.S: Likewise. * sysdeps/unix/alpha/sysdep.h: Likewise. * sysdeps/unix/arm/sysdep.S: Likewise. * sysdeps/unix/i386/sysdep.S: Likewise. * sysdeps/unix/sysv/linux/aarch64/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/getcwd.c: Likewise. * sysdeps/unix/sysv/linux/hppa/nptl/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/i386/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/i386/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/ia64/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/ia64/setjmp.S: Likewise. * sysdeps/unix/sysv/linux/ia64/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/lowlevellock-futex.h: Likewise. * sysdeps/unix/sysv/linux/m68k/bits/m68k-vdso.h: Likewise. * sysdeps/unix/sysv/linux/m68k/m68k-helpers.S: Likewise. * sysdeps/unix/sysv/linux/microblaze/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/s390/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/sh/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/sh/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/sparc/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/tile/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/tile/sysdep.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/lowlevellock.h: Likewise. * sysdeps/unix/sysv/linux/x86_64/sysdep.h: Likewise. * sysdeps/unix/x86_64/sysdep.S: Likewise. * sysdeps/x86_64/setjmp.S: Likewise.
2014-11-05Remove INTDEF / INTUSE / INTVARDEF (bug 14132).Joseph Myers
Completing the removal of the obsolete INTDEF / INTUSE mechanism, this patch removes the final use - that for _dl_starting_up - replacing it by rtld_hidden_def / rtld_hidden_proto. Having removed the last use, the mechanism itself is also removed. Tested for x86_64 that installed stripped shared libraries are unchanged by the patch. (This is not much of a test since this variable is only defined and used in the !HAVE_INLINED_SYSCALLS case.) [BZ #14132] * include/libc-symbols.h (INTUSE): Remove macro. (INTDEF): Likewise. (INTVARDEF): Likewise. (_INTVARDEF): Likewise. (INTDEF2): Likewise. (INTVARDEF2): Likewise. * elf/rtld.c [!HAVE_INLINED_SYSCALLS] (_dl_starting_up): Use rtld_hidden_def instead of INTVARDEF. * sysdeps/generic/ldsodefs.h [IS_IN_rtld] (_dl_starting_up_internal): Remove declaration. (_dl_starting_up): Use rtld_hidden_proto. * elf/dl-init.c [!HAVE_INLINED_SYSCALLS] (_dl_starting_up): Remove declaration. [!HAVE_INLINED_SYSCALLS] (_dl_starting_up_internal): Likewise. (_dl_init) [!HAVE_INLINED_SYSCALLS]: Don't use INTUSE with _dl_starting_up. * elf/dl-writev.h (_dl_writev): Likewise. * sysdeps/powerpc/powerpc64/dl-machine.h [!HAVE_INLINED_SYSCALLS] (DL_STARTING_UP_DEF): Use __GI__dl_starting_up instead of _dl_starting_up_internal.
2014-11-05Don't use INTDEF/INTUSE with _dl_mcount (bug 14132).Joseph Myers
Continuing the removal of the obsolete INTDEF / INTUSE mechanism, this patch replaces its use for _dl_mcount with use of rtld_hidden_def / rtld_hidden_proto. Tested for x86_64 that installed stripped shared libraries are unchanged by the patch. [BZ #14132] * elf/dl-profile.c (_dl_mcount): Use rtld_hidden_def instead of INTDEF. * sysdeps/generic/ldsodefs.h (_dl_mcount_internal): Remove declaration. (_dl_mcount): Use rtld_hidden_proto. * elf/dl-runtime.c (_dl_profile_fixup): Don't use INTUSE with _dl_mcount. * elf/rtld.c (_rtld_global_ro): Likewise.
2014-11-04Don't use INTDEF/INTUSE with _dl_argv (bug 14132).Joseph Myers
Continuing the removal of the obsolete INTDEF / INTUSE mechanism, this patch replaces its use for _dl_argv with rtld_hidden_data_def and rtld_hidden_proto. Some places in .S files that previously used _dl_argv_internal or INTUSE(_dl_argv) now use __GI__dl_argv directly (there are plenty of existing examples of such direct use of __GI_*). A single place in rtld.c previously used _dl_argv without INTUSE, apparently accidentally, while the rtld_hidden_proto mechanism avoids such accidential omissions. As a consequence, this patch *does* change the contents of stripped ld.so. However, the installed stripped shared libraries are identical to those you get if instead of this patch you change that single _dl_argv use to use INTUSE, without any other changes. Tested for x86_64 (testsuite as well as comparison of installed stripped shared libraries as described above). [BZ #14132] * sysdeps/generic/ldsodefs.h (_dl_argv): Use rtld_hidden_proto. [IS_IN_rtld] (_dl_argv_internal): Do not declare. (rtld_progname): Make macro definition unconditional. * elf/rtld.c (_dl_argv): Use rtld_hidden_data_def instead of INTDEF. (dlmopen_doit): Do not use INTUSE with _dl_argv. (dl_main): Likewise. * elf/dl-sysdep.c (_dl_sysdep_start): Likewise. * sysdeps/alpha/dl-machine.h (RTLD_START): Use __GI__dl_argv instead of _dl_argv_internal. * sysdeps/powerpc/powerpc32/dl-start.S (_dl_start_user): Use __GI__dl_argv instead of INTUSE(_dl_argv). * sysdeps/powerpc/powerpc64/dl-machine.h (RTLD_START): Use __GI__dl_argv instead of _dl_argv_internal.
2014-07-03Rely on HP_TIMING_AVAIL implies HP_SMALL_TIMING_AVAILRichard Henderson
2014-07-03Remove HP_TIMING_DIFF_INIT and dl_hp_timing_overheadRichard Henderson
Without HP_TIMING_ACCUM, dl_hp_timing_overhead is write-only. If we remove it, there's no point in HP_TIMING_DIFF_INIT either.
2014-06-25Remove stray includes of kernel-features.h.Joseph Myers
Now that files using __ASSUME_* macros have been made by <https://sourceware.org/ml/libc-alpha/2014-06/msg00543.html> to include <kernel-features.h> directly, any include from a file not using __ASSUME_* macros can safely be removed (as there will no longer be some other file relying on indirect inclusion via a header from which the include is being removed). This patch removes such unnecessary kernel-features.h includes. Tested x86_64 that disassembly of installed shared libraries is unchanged by this patch, except for line numbers in calls to __assert_fail from libc.so and ld.so. 2014-06-23 Joseph Myers <joseph@codesourcery.com> * nptl/createthread.c: Don't include kernel-features.h. * nptl/pthread_cancel.c: Likewise. * nptl/pthread_condattr_setclock.c: Likewise. * nptl/sysdeps/unix/sysv/linux/pt-raise.c: Likewise. * nptl/sysdeps/unix/sysv/linux/pthread_getcpuclockid.c: Likewise. * nptl/sysdeps/unix/sysv/linux/pthread_kill.c: Likewise. * nptl/sysdeps/unix/sysv/linux/pthread_sigqueue.c: Likewise. * nptl/sysdeps/unix/sysv/linux/raise.c: Likewise. * nptl/sysdeps/unix/sysv/linux/s390/s390-32/pt-vfork.S: Likewise. * nptl/sysdeps/unix/sysv/linux/s390/s390-32/vfork.S: Likewise. * nptl/sysdeps/unix/sysv/linux/s390/s390-64/pt-vfork.S: Likewise. * nptl/sysdeps/unix/sysv/linux/s390/s390-64/vfork.S: Likewise. * nptl/sysdeps/unix/sysv/linux/timer_create.c: Likewise. * nptl/sysdeps/unix/sysv/linux/timer_delete.c: Likewise. * nptl/sysdeps/unix/sysv/linux/timer_getoverr.c: Likewise. * nptl/sysdeps/unix/sysv/linux/timer_gettime.c: Likewise. * nptl/sysdeps/unix/sysv/linux/timer_routines.c: Likewise. * nptl/sysdeps/unix/sysv/linux/timer_settime.c: Likewise. * nscd/gai.c: Likewise. * nss/nss_db/db-open.c: Likewise. * sysdeps/generic/ldsodefs.h: Likewise. * sysdeps/sh/nptl/tls.h: Likewise. * sysdeps/unix/sysv/linux/aarch64/sigaction.c: Likewise. * sysdeps/unix/sysv/linux/aarch64/sigcontextinfo.h: Likewise. * sysdeps/unix/sysv/linux/aarch64/vfork.S: Likewise. * sysdeps/unix/sysv/linux/adjtime.c: Likewise. * sysdeps/unix/sysv/linux/alpha/xstatconv.h: Likewise. * sysdeps/unix/sysv/linux/arm/sigaction.c: Likewise. * sysdeps/unix/sysv/linux/arm/sigcontextinfo.h: Likewise. * sysdeps/unix/sysv/linux/check_pf.c: Likewise. * sysdeps/unix/sysv/linux/clock_getcpuclockid.c: Likewise. * sysdeps/unix/sysv/linux/clock_getres.c: Likewise. * sysdeps/unix/sysv/linux/clock_gettime.c: Likewise. * sysdeps/unix/sysv/linux/clock_nanosleep.c: Likewise. * sysdeps/unix/sysv/linux/clock_settime.c: Likewise. * sysdeps/unix/sysv/linux/dl-execstack.c: Likewise. * sysdeps/unix/sysv/linux/dl-osinfo.h: Likewise. * sysdeps/unix/sysv/linux/dl-sysdep.c: Likewise. * sysdeps/unix/sysv/linux/generic/futimesat.c: Likewise. * sysdeps/unix/sysv/linux/generic/poll.c: Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/fcntl.c: Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/fxstatat.c: Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/pread.c: Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/pread64.c: Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/preadv.c: Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/preadv64.c: Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/pwritev.c: Likewise. * sysdeps/unix/sysv/linux/generic/wordsize-32/pwritev64.c: Likewise. * sysdeps/unix/sysv/linux/getcwd.c: Likewise. * sysdeps/unix/sysv/linux/getpagesize.c: Likewise. * sysdeps/unix/sysv/linux/getsysstats.c: Likewise. * sysdeps/unix/sysv/linux/i386/fxstat.c: Likewise. * sysdeps/unix/sysv/linux/i386/lxstat.c: Likewise. * sysdeps/unix/sysv/linux/i386/mmap.S: Likewise. * sysdeps/unix/sysv/linux/i386/mmap64.S: Likewise. * sysdeps/unix/sysv/linux/i386/sigaction.c: Likewise. * sysdeps/unix/sysv/linux/i386/vfork.S: Likewise. * sysdeps/unix/sysv/linux/i386/xstat.c: Likewise. * sysdeps/unix/sysv/linux/ia64/system.c: Likewise. * sysdeps/unix/sysv/linux/if_index.c: Likewise. * sysdeps/unix/sysv/linux/ifaddrs.c: Likewise. * sysdeps/unix/sysv/linux/ifreq.c: Likewise. * sysdeps/unix/sysv/linux/ldsodefs.h: Likewise. * sysdeps/unix/sysv/linux/lutimes.c: Likewise. * sysdeps/unix/sysv/linux/m68k/vfork.S: Likewise. * sysdeps/unix/sysv/linux/microblaze/nptl/vfork.S: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/accept4.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/recvmmsg.c: Likewise. * sysdeps/unix/sysv/linux/mips/mips32/sendmmsg.c: Likewise. * sysdeps/unix/sysv/linux/mips/pread.c: Likewise. * sysdeps/unix/sysv/linux/mips/pread64.c: Likewise. * sysdeps/unix/sysv/linux/mips/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/mips/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/mips/sigaction.c: Likewise. * sysdeps/unix/sysv/linux/mmap64.c: Likewise. * sysdeps/unix/sysv/linux/netlinkaccess.h: Likewise. * sysdeps/unix/sysv/linux/powerpc/chown.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/dl-sysdep.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/clone.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/fe_mask.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/fpu/fe_nomask.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/getcontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/pread.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/pread64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/setcontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/swapcontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc32/vfork.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/fpu/fe_mask.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/fpu/fe_nomask.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/getcontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/makecontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/pread.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/pread64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/setcontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/swapcontext.S: Likewise. * sysdeps/unix/sysv/linux/powerpc/powerpc64/vfork.S: Likewise. * sysdeps/unix/sysv/linux/pread.c: Likewise. * sysdeps/unix/sysv/linux/pread64.c: Likewise. * sysdeps/unix/sysv/linux/prof-freq.c: Likewise. * sysdeps/unix/sysv/linux/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/mmap.S: Likewise. * sysdeps/unix/sysv/linux/s390/s390-32/mmap64.S: Likewise. * sysdeps/unix/sysv/linux/s390/system.c: Likewise. * sysdeps/unix/sysv/linux/sh/pread.c: Likewise. * sysdeps/unix/sysv/linux/sh/pread64.c: Likewise. * sysdeps/unix/sysv/linux/sh/pwrite.c: Likewise. * sysdeps/unix/sysv/linux/sh/pwrite64.c: Likewise. * sysdeps/unix/sysv/linux/sigaction.c: Likewise. * sysdeps/unix/sysv/linux/sigpending.c: Likewise. * sysdeps/unix/sysv/linux/sigprocmask.c: Likewise. * sysdeps/unix/sysv/linux/sigsuspend.c: Likewise. * sysdeps/unix/sysv/linux/sparc/sparc64/xstatconv.c: Likewise. * sysdeps/unix/sysv/linux/sparc/system.c: Likewise. * sysdeps/unix/sysv/linux/syslog.c: Likewise. * sysdeps/unix/sysv/linux/system.c: Likewise. * sysdeps/unix/sysv/linux/testrtsig.h: Likewise. * sysdeps/unix/sysv/linux/timespec_get.c: Likewise. * sysdeps/unix/sysv/linux/ttyname.c: Likewise. * sysdeps/unix/sysv/linux/ttyname_r.c: Likewise. * sysdeps/unix/sysv/linux/utimensat.c: Likewise. * sysdeps/unix/sysv/linux/x86_64/sigaction.c: Likewise. * sysdeps/unix/sysv/linux/xstatconv.h: Likewise.
2014-04-03Factor mmap/munmap of PT_LOAD segments out of _dl_map_object_from_fd et al.Roland McGrath
2014-03-17Revert "Fix HP_SMALL_TIMING_AVAIL -Wundef warnings"Will Newton
This reverts commit 53f1bed39263541ef7f3d86f9701005524938016.
2014-03-17Fix HP_SMALL_TIMING_AVAIL -Wundef warningsWill Newton
ChangeLog: 2014-03-17 Will Newton <will.newton@linaro.org> * sysdeps/generic/ldsodefs.h: Check whether HP_SMALL_TIMING_AVAIL is defined with #ifdef rather than #if.
2014-02-25BZ #16613: Support TLS in audit libraries.Carlos O'Donell
This commit fixes a bug where the dynamic loader would crash when loading audit libraries, via LD_AUDIT, where those libraries used TLS. The dynamic loader was not considering that the audit libraries would use TLS and failed to bump the TLS generation counter leaving TLS usage inconsistent after loading the audit libraries. https://sourceware.org/ml/libc-alpha/2014-02/msg00569.html
2014-02-06Revert "Patch [1/4] async-signal safe TLS."Allan McRae
This reverts commit 69a17d9d245dc3551792e95e1823cc2d877592f3.
2014-02-06Revert "Patch 3/4 of the effort to make TLS access async-signal-safe."Allan McRae
This reverts commit 35e8f7ab94c910659de9d507aa0f3e1f8973d914.
2014-02-06Revert "Patch 2/4 of the effort to make TLS access async-signal-safe."Allan McRae
This reverts commit 1f33d36a8a9e78c81bed59b47f260723f56bb7e6. Conflicts: elf/dl-misc.c Also reverts the follow commits that were bug fixes to new code introduced in the above commit: 063b2acbce83549df82ab30f5af573f1b9c4bd19 b627fdd58554bc36bd344dc40a8787c4b7a9cc46 e81c64bba13d2d8b2a4e53254a82cc80f27c8497
2014-01-01Update copyright notices with scripts/update-copyrightsAllan McRae
2013-12-18Patch 2/4 of the effort to make TLS access async-signal-safe.Paul Pluzhnikov
Add a signal-safe malloc replacement. 2013-12-18 Andrew Hunter <ahh@google.com> * sysdeps/generic/ldsodefs.h (__signal_safe_memalign): New prototype. (__signal_safe_malloc, __signal_safe_free): Likewise. (__signal_safe_realloc, __signal_safe_calloc): Likewise. * elf/dl-misc.c (__signal_safe_allocator_header): New struct. (__signal_safe_memalign, __signal_safe_malloc): New function. (__signal_safe_free, __signal_safe_realloc): Likewise. (__signal_safe_calloc): Likewise. * elf/dl-tls.c (allocate_dtv, _dl_clear_dtv): Call signal-safe functions. (_dl_deallocate_tls, _dl_update_slotinfo): Likewise.
2013-12-18Patch 3/4 of the effort to make TLS access async-signal-safe.Paul Pluzhnikov
Factor out _dl_clear_dtv. 2013-12-18 Andrew Hunter <ahh@google.com> * elf/Versions (ld): Add _dl_clear_dtv. * sysdeps/generic/ldsodefs.h (_dl_clear_dtv): New prototype. * elf/dl-tls.c (_dl_clear_dtv): New function. * nptl/allocatestack.c (get_cached_stack): Call _dl_clear_dtv.
2013-12-18Patch [1/4] async-signal safe TLS.Paul Pluzhnikov
2013-12-18 Andrew Hunter <ahh@google.com> * sysdeps/generic/ldsodefs.h (_dl_mask_all_signals): New prototype. (_dl_unmask_signals): Likewise. * sysdeps/mach/hurd/dl-sysdep.h (_dl_mask_all_signals): New stub. (_dl_unmask_all_signals): Likewise. * sysdeps/unix/sysv/linux/dl-sysdep.h (_dl_mask_all_signals): New prototype. (_dl_unmask_all_signals): Likewise. * sysdeps/unix/sysv/linux/dl-sysdep.c (_dl_mask_all_signals): New function. (_dl_unmask_signals): Likewise.
2013-11-21Don't use broken DL_AUTO_FUNCTION_ADDRESS()Guy Martin
On hppa and ia64, the macro DL_AUTO_FUNCTION_ADDRESS() uses the variable fptr[2] in it's own scope. The content of fptr[] is thus undefined right after the macro exits. Newer gcc's (>= 4.7) reuse the stack space of this variable triggering a segmentation fault in dl-init.c:69. To fix this we rewrite the macros to make the call directly to init and fini without needing to pass back a constructed function pointer.
2013-06-28Add GLRO(dl_hwcap2) for new AT_HWCAP2 auxv_t a_type.Ryan S. Arnold
2013-05-29Avoid crashing in LD_DEBUG when program name is unavailableSiddhesh Poyarekar
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.
2013-05-16Add #include <stdint.h> for uint[32|64]_t usage (except installed headers).Ryan S. Arnold
2013-05-07Declare _dl_skip_args in ldsodefs.h header.Roland McGrath
2013-03-28Make _dl_phdr pointer to const.Roland McGrath
2013-03-28Consolidate declarations of _dl_phdr, _dl_phnum.Roland McGrath
2013-03-15Move _dl_non_dynamic_init, _dl_aux_init declarations.Roland McGrath
2013-03-01Fix NEED_DL_SYSINFO_DSO conditionals.Roland McGrath
2013-02-18New function _dl_find_dso_for_objectSiddhesh Poyarekar
Consolidate code to search for an address within a DSO.
2013-01-02Update copyright notices with scripts/update-copyrights.Joseph Myers
2012-09-28Define VERSYMIDX/VALIDX/ADDRIDX in ldsodefs.hH.J. Lu
2012-07-30Fix lots of bitrot for stub configurations.Roland McGrath
2012-07-25Move ldsodefs.h audit definitions to sysdeps directories.Joseph Myers
2012-05-20Add <sys/auxv.h> and getauxval.Richard Henderson
2012-05-10Hurd: Fix value of __libc_stack_endSamuel Thibault
2012-04-11New ld.so argument --inhibit-ldcache to disable ld.so.cache lookupSiddhesh Poyarekar
It may sometimes be desirable to make the dynamic linker only pick up libraries from the library path and rpath and not look at the ld.so.cache that ldconfig generates. An example of such a use case is the glibc testsuite where the dynamic linker must not be influenced by any external paths or caches. This change adds a new option --inhibit-ldcache that when used, tells the dynamic linker to not use ld.so.cache even if it is available.
2012-03-22Add forward declaration for La_x32_regs/La_x32_retvalH.J. Lu
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