January 2016 - devel - example.com

[PATCH] libdl: dlopen() mustn't forget RTLD_NODELETE flag
by Leonid Lisovskiy 02 Feb '16

02 Feb '16

If RTLD_NODELETE is passed to dlopen() rather than set on shared library itself, flag propagation to rtld_flags is missed. Test-case taken from glibc. Signed-off-by: Leonid Lisovskiy <lly.dev(a)gmail.com> --- ldso/libdl/libdl.c | 6 +- test/dlopen/Makefile.in | 9 ++- test/dlopen/nodelete.c | 205 ++++++++++++++++++++++++++++++++++++++++++++++++ test/dlopen/nodelmod1.c | 10 +++ test/dlopen/nodelmod2.c | 10 +++ test/dlopen/nodelmod3.c | 8 ++ test/dlopen/nodelmod4.c | 10 +++ 7 files changed, 254 insertions(+), 4 deletions(-) create mode 100644 test/dlopen/nodelete.c create mode 100644 test/dlopen/nodelmod1.c create mode 100644 test/dlopen/nodelmod2.c create mode 100644 test/dlopen/nodelmod3.c create mode 100644 test/dlopen/nodelmod4.c diff --git a/ldso/libdl/libdl.c b/ldso/libdl/libdl.c index 2c4b064..08619bc 100644 --- a/ldso/libdl/libdl.c +++ b/ldso/libdl/libdl.c @@ -394,7 +394,7 @@ static void *do_dlopen(const char *libname, int flag, ElfW(Addr) from) dyn_chain = (struct dyn_elf *) malloc(sizeof(struct dyn_elf)); memset(dyn_chain, 0, sizeof(struct dyn_elf)); dyn_chain->dyn = tpnt; - tpnt->rtld_flags |= (flag & RTLD_GLOBAL); + tpnt->rtld_flags |= (flag & (RTLD_GLOBAL|RTLD_NODELETE)); dyn_chain->next_handle = _dl_handles; _dl_handles = dyn_ptr = dyn_chain; @@ -407,7 +407,7 @@ static void *do_dlopen(const char *libname, int flag, ElfW(Addr) from) dyn_chain->init_fini.init_fini = handle->init_fini.init_fini; dyn_chain->init_fini.nlist = handle->init_fini.nlist; for (i = 0; i < dyn_chain->init_fini.nlist; i++) - dyn_chain->init_fini.init_fini[i]->rtld_flags |= (flag & RTLD_GLOBAL); + dyn_chain->init_fini.init_fini[i]->rtld_flags |= (flag & (RTLD_GLOBAL|RTLD_NODELETE)); dyn_chain->next = handle->next; break; } @@ -439,7 +439,7 @@ static void *do_dlopen(const char *libname, int flag, ElfW(Addr) from) if (!tpnt1) goto oops; - tpnt1->rtld_flags |= (flag & RTLD_GLOBAL); + tpnt1->rtld_flags |= (flag & (RTLD_GLOBAL|RTLD_NODELETE)); /* This list is for dlsym() and relocation */ dyn_ptr->next = (struct dyn_elf *) malloc(sizeof(struct dyn_elf)); diff --git a/test/dlopen/Makefile.in b/test/dlopen/Makefile.in index 85996de..a02b2b9 100644 --- a/test/dlopen/Makefile.in +++ b/test/dlopen/Makefile.in @@ -5,7 +5,7 @@ export UCLIBC_ONLY := 1 TESTS := dltest dltest2 dlstatic test1 test2 test3 dlundef dlafk dladdr \ - testscope + testscope nodelete ifneq ($(HAVE_SHARED),y) TESTS_DISABLED := test3 @@ -63,3 +63,10 @@ LDFLAGS_libtest3.so := -lpthread -Wl,-rpath,. LDFLAGS_libC.so := -ldl LDFLAGS_libB.so := ./libC.so -Wl,-rpath,. LDFLAGS_libA.so := ./libB.so -Wl,-rpath,. + +nodelete: nodelmod1.so nodelmod2.so nodelmod3.so +nodelmod3.so: nodelmod4.so +LDFLAGS_nodelete := -rdynamic -ldl +LDFLAGS_nodelmod1.so := -Wl,-z,nodelete +LDFLAGS_nodelmod3.so := ./nodelmod4.so +LDFLAGS_nodelmod4.so := -Wl,-z,nodelete diff --git a/test/dlopen/nodelete.c b/test/dlopen/nodelete.c new file mode 100644 index 0000000..07ff961 --- /dev/null +++ b/test/dlopen/nodelete.c @@ -0,0 +1,205 @@ +#include <dlfcn.h> +#include <setjmp.h> +#include <signal.h> +#include <stdio.h> +#include <stdlib.h> + + +static sigjmp_buf jmpbuf; + + +int fini_ran; + + +static void +__attribute__ ((noreturn)) +handler (int sig) +{ + siglongjmp (jmpbuf, 1); +} + + +#define TEST_FUNCTION do_test () +static int +do_test (void) +{ + /* We are testing the two possibilities to mark an object as not deletable: + - marked on the linker commandline with `-z nodelete' + - with the RTLD_NODELETE flag at dlopen()-time. + + The test we are performing should be safe. We are loading the objects, + get the address of variables in the respective object, unload the object + and then try to read the variable. If the object is unloaded this + should lead to an segmentation fault. */ + void *p; + struct sigaction sa; + + sa.sa_handler = handler; + sigfillset (&sa.sa_mask); + sa.sa_flags = SA_RESTART; + + if (sigaction (SIGSEGV, &sa, NULL) == -1) + puts ("cannot install signal handler: %m"); + + p = dlopen ("nodelmod1.so", RTLD_LAZY); + if (p == NULL) + { + printf ("failed to load \"nodelmod1.so\": %s\n", dlerror ()); + exit (1); + } + else + { + int *varp; + + varp = dlsym (p, "var1"); + if (varp == NULL) + { + puts ("failed to get address of \"var1\" in \"nodelmod1.so\""); + exit (1); + } + else + { + *varp = 20000720; + + /* Now close the object. */ + fini_ran = 0; + if (dlclose (p) != 0) + { + puts ("failed to close \"nodelmod1.so\""); + exit (1); + } + else if (! sigsetjmp (jmpbuf, 1)) + { + /* Access the variable again. */ + if (*varp != 20000720) + { + puts ("\"var1\" value not correct"); + exit (1); + } + else if (fini_ran != 0) + { + puts ("destructor of \"nodelmod1.so\" ran"); + exit (1); + } + else + puts ("-z nodelete test succeeded"); + } + else + { + /* We caught an segmentation fault. */ + puts ("\"nodelmod1.so\" got deleted!"); + exit (1); + } + } + } + + p = dlopen ("nodelmod2.so", RTLD_LAZY | RTLD_NODELETE); + if (p == NULL) + { + printf ("failed to load \"nodelmod2.so\": %s\n", dlerror ()); + exit (1); + } + else + { + int *varp; + + varp = dlsym (p, "var2"); + if (varp == NULL) + { + puts ("failed to get address of \"var2\" in \"nodelmod2.so\""); + exit (1); + } + else + { + *varp = 42; + + /* Now close the object. */ + fini_ran = 0; + if (dlclose (p) != 0) + { + puts ("failed to close \"nodelmod2.so\""); + exit (1); + } + else if (! sigsetjmp (jmpbuf, 1)) + { + /* Access the variable again. */ + if (*varp != 42) + { + puts ("\"var2\" value not correct"); + exit (1); + } + else if (fini_ran != 0) + { + puts ("destructor of \"nodelmod2.so\" ran"); + exit (1); + } + else + puts ("RTLD_NODELETE test succeeded"); + } + else + { + /* We caught an segmentation fault. */ + puts ("\"nodelmod2.so\" got deleted!"); + exit (1); + } + } + } + + p = dlopen ("nodelmod3.so", RTLD_LAZY); + if (p == NULL) + { + printf ("failed to load \"nodelmod3.so\": %s\n", dlerror ()); + exit (1); + } + else + { + int *(*fctp) (void); + + fctp = dlsym (p, "addr"); + if (fctp == NULL) + { + puts ("failed to get address of \"addr\" in \"nodelmod3.so\""); + exit (1); + } + else + { + int *varp = fctp (); + + *varp = -1; + + /* Now close the object. */ + fini_ran = 0; + if (dlclose (p) != 0) + { + puts ("failed to close \"nodelmod3.so\""); + exit (1); + } + else if (! sigsetjmp (jmpbuf, 1)) + { + /* Access the variable again. */ + if (*varp != -1) + { + puts ("\"var_in_mod4\" value not correct"); + exit (1); + } + else if (fini_ran != 0) + { + puts ("destructor of \"nodelmod4.so\" ran"); + exit (1); + } + else + puts ("-z nodelete in dependency succeeded"); + } + else + { + /* We caught an segmentation fault. */ + puts ("\"nodelmod4.so\" got deleted!"); + exit (1); + } + } + } + + return 0; +} + +#include "../test-skeleton.c" diff --git a/test/dlopen/nodelmod1.c b/test/dlopen/nodelmod1.c new file mode 100644 index 0000000..51be080 --- /dev/null +++ b/test/dlopen/nodelmod1.c @@ -0,0 +1,10 @@ +extern int fini_ran; + +int var1 = 42; + +static void +__attribute__ ((__destructor__)) +destr (void) +{ + fini_ran = 1; +} diff --git a/test/dlopen/nodelmod2.c b/test/dlopen/nodelmod2.c new file mode 100644 index 0000000..ff2ffc2 --- /dev/null +++ b/test/dlopen/nodelmod2.c @@ -0,0 +1,10 @@ +extern int fini_ran; + +int var2 = 100; + +static void +__attribute__ ((__destructor__)) +destr (void) +{ + fini_ran = 1; +} diff --git a/test/dlopen/nodelmod3.c b/test/dlopen/nodelmod3.c new file mode 100644 index 0000000..817c94d --- /dev/null +++ b/test/dlopen/nodelmod3.c @@ -0,0 +1,8 @@ +extern int var_in_mod4; +extern int *addr (void); + +int * +addr (void) +{ + return &var_in_mod4; +} diff --git a/test/dlopen/nodelmod4.c b/test/dlopen/nodelmod4.c new file mode 100644 index 0000000..d7fa893 --- /dev/null +++ b/test/dlopen/nodelmod4.c @@ -0,0 +1,10 @@ +extern int fini_ran; + +int var_in_mod4 = 99; + +static void +__attribute__ ((__destructor__)) +destr (void) +{ + fini_ran = 1; +} -- 1.8.5.6

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Add __adjtimex() ?
by Leonid Lisovskiy 02 Feb '16

02 Feb '16

uClibc-ng provides adjtimex() function only, but some programs(like ntpd) requires it's alias - __adjtimex(). There were two methods to implement it: 1) OpenWRT way - just a simple #define https://dev.openwrt.org/browser/trunk/toolchain/uClibc/patches-0.9.33.2/120… 2) glibc way - do it via strong alias Should we implement __adjtimex() in uClibc-ng? Which way is acceptable for mainstream? Regards, Leonid

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[PATCH 1/2] ldso: Fix fail of $ORIGIN expansion in case of RTLD_NOLOAD
by Leonid Lisovskiy 02 Feb '16

02 Feb '16

$ORIGIN expansion in search_for_named_library() wrongly takes into account all bits of rflags. Signed-off-by: Leonid Lisovskiy <lly.dev(a)gmail.com> --- ldso/ldso/dl-elf.c | 4 +++- 1 file changed, 3 insertions(+), 1 deletion(-) diff --git a/ldso/ldso/dl-elf.c b/ldso/ldso/dl-elf.c index 01b29da..5b8572a 100644 --- a/ldso/ldso/dl-elf.c +++ b/ldso/ldso/dl-elf.c @@ -162,7 +162,9 @@ search_for_named_library(const char *name, unsigned rflags, const char *path_lis if (plen >= 7 && _dl_memcmp(p, "$ORIGIN", 7) == 0) { int olen; - if (rflags && plen != 7) + /* $ORIGIN is not expanded for SUID/GUID programs + (except if it is $ORIGIN alone) */ + if ((rflags & DL_RESOLVE_SECURE) && plen != 7) continue; if (origin == NULL) continue; -- 1.8.5.6

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uClibc-ng - small C library for embedded systems branch 1.0 updated. v1.0.11-5-g12a8573
by wbx＠helium.waldemar-brodkorb.de 30 Jan '16

30 Jan '16

This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "uClibc-ng - small C library for embedded systems". The branch, 1.0 has been updated via 12a85731dc5fda3bc01ab19c82678b3bf122d794 (commit) from e6acefa2ddd445e7e13aa89ced6d184a08ad8da6 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit 12a85731dc5fda3bc01ab19c82678b3bf122d794 Author: Waldemar Brodkorb <wbx(a)uclibc-ng.org> Date: Sat Jan 30 10:36:17 2016 +0100 add exp10() from glibc Some software make use of exp10, so add it. Basic testing with LTP. Signed-off-by: Waldemar Brodkorb <wbx(a)uclibc-ng.org> ----------------------------------------------------------------------- Summary of changes: libc/sysdeps/linux/common/bits/mathcalls.h | 6 +++--- libm/Makefile.in | 4 ++-- libc/signal/sigignore.c => libm/e_exp10.c | 26 +++++++++++++------------- libm/math_private.h | 1 + 4 files changed, 19 insertions(+), 18 deletions(-) copy libc/signal/sigignore.c => libm/e_exp10.c (63%) diff --git a/libc/sysdeps/linux/common/bits/mathcalls.h b/libc/sysdeps/linux/common/bits/mathcalls.h index 9bebb51..8ab8075 100644 --- a/libc/sysdeps/linux/common/bits/mathcalls.h +++ b/libc/sysdeps/linux/common/bits/mathcalls.h @@ -145,11 +145,11 @@ __MATHCALLI (log10,, (_Mdouble_ __x)) __MATHCALLI (modf,, (_Mdouble_ __x, _Mdouble_ *__iptr)) _Mdouble_END_NAMESPACE -#if 0 /*def __USE_GNU*/ +#if defined __USE_GNU /* A function missing in all standards: compute exponent to base ten. */ -__MATHCALL (exp10,, (_Mdouble_ __x)) +__MATHCALLI (exp10,, (_Mdouble_ __x)) /* Another name occasionally used. */ -__MATHCALL (pow10,, (_Mdouble_ __x)) +__MATHCALLI (pow10,, (_Mdouble_ __x)) #endif #if defined __USE_MISC || defined __USE_XOPEN_EXTENDED || defined __USE_ISOC99 diff --git a/libm/Makefile.in b/libm/Makefile.in index d886cdb..f0e5528 100644 --- a/libm/Makefile.in +++ b/libm/Makefile.in @@ -56,7 +56,7 @@ LD_MSRC := ldouble_wrappers.c ifeq ($(DO_C99_MATH),y) libm_CSRC := \ e_acos.c e_acosh.c e_asin.c e_atan2.c e_atanh.c e_cosh.c \ - e_exp.c e_fmod.c e_hypot.c \ + e_exp.c e_exp10.c e_fmod.c e_hypot.c \ e_lgamma_r.c e_log.c e_log2.c e_log10.c \ e_pow.c e_remainder.c e_rem_pio2.c e_scalb.c e_sinh.c \ e_sqrt.c k_cos.c k_rem_pio2.c k_sin.c k_standard.c k_tan.c \ @@ -238,7 +238,7 @@ libm_CSRC := \ s_expm1.c s_scalbn.c s_copysign.c e_acos.c e_asin.c e_atan2.c \ k_cos.c e_cosh.c e_exp.c e_fmod.c e_log.c e_log10.c e_pow.c \ k_sin.c e_sinh.c e_sqrt.c k_tan.c e_rem_pio2.c k_rem_pio2.c \ - s_finite.c + s_finite.c e_exp10.c # We'll add sqrtf to avoid problems with libstdc++ FL_MOBJ := sqrtf.o endif diff --git a/libc/signal/sigignore.c b/libm/e_exp10.c similarity index 63% copy from libc/signal/sigignore.c copy to libm/e_exp10.c index 1ddce81..f0ee878 100644 --- a/libc/signal/sigignore.c +++ b/libm/e_exp10.c @@ -1,5 +1,4 @@ -/* Set the disposition of SIG to SIG_IGN. - Copyright (C) 1998, 2005 Free Software Foundation, Inc. +/* Copyright (C) 1998-2015 Free Software Foundation, Inc. This file is part of the GNU C Library. Contributed by Ulrich Drepper <drepper(a)cygnus.com>, 1998. @@ -17,17 +16,18 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ -#define __need_NULL -#include <stddef.h> -#include <signal.h> -#include <string.h> +#include "math.h" +#include "math_private.h" +#include <float.h> -int sigignore (int sig) +double __ieee754_exp10 (double arg) { - struct sigaction act; - - memset(&act, 0, sizeof(act)); - act.sa_handler = SIG_IGN; - - return sigaction (sig, &act, NULL); + if (isfinite (arg) && arg < DBL_MIN_10_EXP - DBL_DIG - 10) + return DBL_MIN * DBL_MIN; + else + /* This is a very stupid and inprecise implementation. It'll get + replaced sometime (soon?). */ + return __ieee754_exp (M_LN10 * arg); } +strong_alias(__ieee754_exp10, exp10) +libm_hidden_def(exp10) diff --git a/libm/math_private.h b/libm/math_private.h index be8031e..b62dcfe 100644 --- a/libm/math_private.h +++ b/libm/math_private.h @@ -158,6 +158,7 @@ extern double __ieee754_atanh (double) attribute_hidden; extern double __ieee754_asin (double) attribute_hidden; extern double __ieee754_atan2 (double,double) attribute_hidden; extern double __ieee754_exp (double) attribute_hidden; +extern double __ieee754_exp10 (double) attribute_hidden; extern double __ieee754_cosh (double) attribute_hidden; extern double __ieee754_fmod (double,double) attribute_hidden; extern double __ieee754_pow (double,double) attribute_hidden; hooks/post-receive -- uClibc-ng - small C library for embedded systems

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ARM with DODEBUG
by Waldemar Brodkorb 28 Jan '16

28 Jan '16

Hi, I would like to build uClibc-ng with DODEBUG=y, to analyze a problem with Kodi on Raspberry PI2. But the compile fails: /home/wbx/kodi-uclibc/toolchain_raspberry-pi2_uclibc-ng_arm_hard_eabihf/usr/bin/arm-openadk-linux-uclibceabihf-gcc -Wl,-EL -shared -Wl,--warn-common -Wl,--warn-once -Wl,-z,combreloc -Wl,-z,relro -Wl,-z,now -Wl,-z,defs -L/home/wbx/kodi-uclibc/target_raspberry-pi2_uclibc-ng_arm_hard_eabihf/lib -L/home/wbx/kodi-uclibc/target_raspberry-pi2_uclibc-ng_arm_hard_eabihf/usr/lib -Wl,-O1 -Wl,-rpath -Wl,/usr/lib -Wl,-rpath-link -Wl,/home/wbx/kodi-uclibc/target_raspberry-pi2_uclibc-ng_arm_hard_eabihf/usr/lib -Wl,-e,_start -Wl,-z,now -Wl,-Bsymbolic -Wl,--export-dynamic -Wl,--sort-common -Wl,--discard-locals -Wl,--discard-all -Wl,--no-undefined -Wl,-soname=ld-uClibc.so.1 -nostdlib -nostartfiles -o lib/ld-uClibc-1.0.11.so -Wl,--whole-archive ldso/ldso/ld-uClibc_so.a -Wl,--no-whole-archive /home/wbx/kodi-uclibc/toolchain_raspberry-pi2_uclibc-ng_arm_hard_eabihf/usr/lib/gcc/arm-openadk-linux-uclibceabihf/5.3.0/libgcc.a /home/wbx/kodi-uclibc/toolchain_raspberry-pi2_uclibc-ng_arm_hard_eabihf/usr/lib/gcc/arm-openadk-linux-uclibceabihf/5.3.0/libgcc.a(unwind-arm.o): In function `unwind_phase2': /home/wbx/kodi-uclibc/toolchain_build_raspberry-pi2_uclibc-ng_arm_hard_eabihf/w-gcc-5.3.0-1/gcc-5.3.0/libgcc/unwind-arm-common.inc:289: undefined reference to `abort' /home/wbx/kodi-uclibc/toolchain_raspberry-pi2_uclibc-ng_arm_hard_eabihf/usr/lib/gcc/arm-openadk-linux-uclibceabihf/5.3.0/libgcc.a(unwind-arm.o): In function `unwind_phase2_forced': /home/wbx/kodi-uclibc/toolchain_build_raspberry-pi2_uclibc-ng_arm_hard_eabihf/w-gcc-5.3.0-1/gcc-5.3.0/libgcc/unwind-arm-common.inc:346: undefined reference to `memcpy' collect2: error: ld returned 1 exit status make[6]: *** [lib/ld-uClibc.so] Error 1 make[5]: *** [/home/wbx/kodi-uclibc/toolchain_build_raspberry-pi2_uclibc-ng_arm_hard_eabihf/w-uClibc-ng-1.0.11-1/uClibc-ng-1.0.11/.compiled] Error 2 make[4]: *** [uclibc-ng-compile] Error 2 make[3]: *** [toolchain/final] Error 2 make[2]: *** [world] Error 2 Does anybody have an idea what could be going wrong here? It is a two-stage toolchain build, so only a gcc with --disabled-shared is used to compile the C library. best regards Waldemar

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uClibc-ng - small C library for embedded systems branch 1.0 updated. v1.0.11-4-ge6acefa
by wbx＠helium.waldemar-brodkorb.de 27 Jan '16

27 Jan '16

This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "uClibc-ng - small C library for embedded systems". The branch, 1.0 has been updated via e6acefa2ddd445e7e13aa89ced6d184a08ad8da6 (commit) via 61cf47568f3f81589cc4462945832c18ec3af410 (commit) from acffbf7d150101fe96c4fa1256fa73371049d4ff (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit e6acefa2ddd445e7e13aa89ced6d184a08ad8da6 Author: Waldemar Brodkorb <wbx(a)openadk.org> Date: Wed Jan 27 22:33:34 2016 +0100 nios2: allow to build toolchain At least allow to compile a toolchain targeting nios2 without MMU. commit 61cf47568f3f81589cc4462945832c18ec3af410 Author: Waldemar Brodkorb <wbx(a)openadk.org> Date: Wed Jan 27 22:32:52 2016 +0100 test: disable tests requiring math headers ----------------------------------------------------------------------- Summary of changes: extra/Configs/Config.nios2 | 1 - libc/sysdeps/linux/nios2/bits/kernel_types.h | 16 ++++++++-------- libc/sysdeps/linux/nios2/bits/syscalls.h | 3 ++- libc/sysdeps/linux/nios2/crt1.S | 1 + libc/sysdeps/linux/nios2/vfork.S | 4 +--- test/Makefile | 3 +++ test/locale-mbwc/Makefile.in | 4 ++++ 7 files changed, 19 insertions(+), 13 deletions(-) diff --git a/extra/Configs/Config.nios2 b/extra/Configs/Config.nios2 index 8bb8aca..2310a46 100644 --- a/extra/Configs/Config.nios2 +++ b/extra/Configs/Config.nios2 @@ -13,5 +13,4 @@ config FORCE_OPTIONS_FOR_ARCH select ARCH_LITTLE_ENDIAN select ARCH_HAS_NO_MMU select ARCH_HAS_NO_LDSO - select ARCH_HAS_DEPRECATED_SYSCALLS select HAVE_NO_PIC diff --git a/libc/sysdeps/linux/nios2/bits/kernel_types.h b/libc/sysdeps/linux/nios2/bits/kernel_types.h index 3c030e7..004f9c7 100644 --- a/libc/sysdeps/linux/nios2/bits/kernel_types.h +++ b/libc/sysdeps/linux/nios2/bits/kernel_types.h @@ -4,8 +4,8 @@ * our private content, and not the kernel header, will win. * -Erik */ -#ifndef _ASM_NIOS2_POSIX_TYPES_H -#define _ASM_NIOS2_POSIX_TYPES_H +#ifndef __ASM_GENERIC_POSIX_TYPES_H +#define __ASM_GENERIC_POSIX_TYPES_H typedef unsigned long __kernel_dev_t; typedef unsigned long __kernel_ino_t; @@ -14,8 +14,8 @@ typedef unsigned short __kernel_nlink_t; typedef long __kernel_off_t; typedef int __kernel_pid_t; typedef unsigned short __kernel_ipc_pid_t; -typedef unsigned short __kernel_uid_t; -typedef unsigned short __kernel_gid_t; +typedef unsigned int __kernel_uid_t; +typedef unsigned int __kernel_gid_t; typedef unsigned int __kernel_size_t; typedef int __kernel_ssize_t; typedef int __kernel_ptrdiff_t; @@ -28,9 +28,9 @@ typedef unsigned short __kernel_uid16_t; typedef unsigned short __kernel_gid16_t; typedef unsigned int __kernel_uid32_t; typedef unsigned int __kernel_gid32_t; -typedef unsigned short __kernel_old_uid_t; -typedef unsigned short __kernel_old_gid_t; -typedef unsigned short __kernel_old_dev_t; +typedef unsigned int __kernel_old_uid_t; +typedef unsigned int __kernel_old_gid_t; +typedef unsigned int __kernel_old_dev_t; typedef long __kernel_long_t; typedef unsigned long __kernel_ulong_t; typedef long long __kernel_loff_t; @@ -43,4 +43,4 @@ typedef struct { #endif } __kernel_fsid_t; -#endif /* _ASM_NIOS2_POSIX_TYPES_H */ +#endif /* __ASM_GENERIC_POSIX_TYPES_H */ diff --git a/libc/sysdeps/linux/nios2/bits/syscalls.h b/libc/sysdeps/linux/nios2/bits/syscalls.h index 3214e3c..5be5d4d 100644 --- a/libc/sysdeps/linux/nios2/bits/syscalls.h +++ b/libc/sysdeps/linux/nios2/bits/syscalls.h @@ -4,10 +4,11 @@ # error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead." #endif +#define TRAP_ID_SYSCALL 0 + #ifndef __ASSEMBLER__ #include <errno.h> -#include <asm/traps.h> #define __syscall_return(type, res) \ do { \ diff --git a/libc/sysdeps/linux/nios2/crt1.S b/libc/sysdeps/linux/nios2/crt1.S index 7bf4e37..c178452 100644 --- a/libc/sysdeps/linux/nios2/crt1.S +++ b/libc/sysdeps/linux/nios2/crt1.S @@ -14,6 +14,7 @@ #include <features.h> #include <asm/unistd.h> +#define TRAP_ID_SYSCALL 0 .global _start .type _start,@function diff --git a/libc/sysdeps/linux/nios2/vfork.S b/libc/sysdeps/linux/nios2/vfork.S index 5d61db0..2aee81e 100644 --- a/libc/sysdeps/linux/nios2/vfork.S +++ b/libc/sysdeps/linux/nios2/vfork.S @@ -12,9 +12,7 @@ #include <sys/syscall.h> -#ifndef __NR_vfork -#define __NR_vfork __NR_fork /* uClinux-2.0 only has fork which is vfork */ -#endif +#define __NR_vfork 1071 .text .global __vfork diff --git a/test/Makefile b/test/Makefile index 525a69c..138308e 100644 --- a/test/Makefile +++ b/test/Makefile @@ -21,6 +21,9 @@ endif ifneq ($(UCLIBC_HAS_THREADS)$(ARCH_USE_MMU),yy) DIRS := $(filter-out pthread,$(DIRS)) endif +ifneq ($(UCLIBC_HAS_FLOATS),y) + DIRS := $(filter-out math,$(DIRS)) +endif ifneq ($(UCLIBC_HAS_FULL_RPC),y) DIRS := $(filter-out rpc,$(DIRS)) endif diff --git a/test/locale-mbwc/Makefile.in b/test/locale-mbwc/Makefile.in index e70a613..d6a84f2 100644 --- a/test/locale-mbwc/Makefile.in +++ b/test/locale-mbwc/Makefile.in @@ -21,6 +21,10 @@ TESTS := tst_iswalnum tst_iswalpha tst_iswcntrl \ # NOTE: For now disabled tst_strfmon to avoid build failure. TESTS_DISABLED := tst_strfmon +ifneq ($(UCLIBC_HAS_FLOATS),y) +TESTS_DISABLED += tst_swscanf tst_wcstod +endif + DODIFF_rint := 1 EXTRA_CFLAGS := -D__USE_GNU -fno-builtin -fPIC hooks/post-receive -- uClibc-ng - small C library for embedded systems

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syscalls with 6 arguments broken on x86 32bit
by Ronald Wahl 26 Jan '16

26 Jan '16

Hi, I originally reported this for uClibc but I think it might be interesting for uclibc-ng as well (or even more since original uClibc gets more and more stale): See https://bugs.busybox.net/show_bug.cgi?id=8611 Maybe you also find a better approach as the one I implemented. - ron -- Ronald Wahl - ronald.wahl(a)raritan.com - Phone +49 375271349-0 Fax -99 Raritan Deutschland GmbH, Kornmarkt 7, 08056 Zwickau, Germany USt-IdNr. DE813094160, Steuer-Nr. 227/117/01749 Amtsgericht Chemnitz HRB 23605 Geschäftsführung: Abdulrasul Damji, Ralf Ploenes

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uClibc-ng - small C library for embedded systems branch 1.0 updated. v1.0.11-2-gacffbf7
by wbx＠helium.waldemar-brodkorb.de 25 Jan '16

25 Jan '16

This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "uClibc-ng - small C library for embedded systems". The branch, 1.0 has been updated via acffbf7d150101fe96c4fa1256fa73371049d4ff (commit) from cc22effd6d4b8ecb3a5a5d50cb29ac77d38f74bb (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- commit acffbf7d150101fe96c4fa1256fa73371049d4ff Author: Waldemar Brodkorb <wbx(a)openadk.org> Date: Mon Jan 25 23:53:18 2016 +0100 hppa: unbreak toolchain building At least allow to build a toolchain for hppa. Sync some headers with glibc. ----------------------------------------------------------------------- Summary of changes: extra/Configs/Config.in | 4 +- libc/sysdeps/linux/hppa/bits/atomic.h | 7 +- libc/sysdeps/linux/hppa/bits/mman.h | 122 ++++++++++++-------- libc/sysdeps/linux/hppa/sys/procfs.h | 16 ++- libc/sysdeps/linux/hppa/sys/user.h | 1 + .../sysdeps/hppa/pspinlock.c | 0 .../sysdeps/hppa/pt-machine.h | 0 7 files changed, 87 insertions(+), 63 deletions(-) create mode 100644 libc/sysdeps/linux/hppa/sys/user.h copy libpthread/{linuxthreads => linuxthreads.old}/sysdeps/hppa/pspinlock.c (100%) copy libpthread/{linuxthreads => linuxthreads.old}/sysdeps/hppa/pt-machine.h (100%) diff --git a/extra/Configs/Config.in b/extra/Configs/Config.in index 25b5126..3afc291 100644 --- a/extra/Configs/Config.in +++ b/extra/Configs/Config.in @@ -70,8 +70,8 @@ config TARGET_cris config TARGET_h8300 bool "h8300" -#config TARGET_hppa -# bool "hppa" +config TARGET_hppa + bool "hppa" config TARGET_i386 bool "i386" diff --git a/libc/sysdeps/linux/hppa/bits/atomic.h b/libc/sysdeps/linux/hppa/bits/atomic.h index 0bf5a6a..9890af2 100644 --- a/libc/sysdeps/linux/hppa/bits/atomic.h +++ b/libc/sysdeps/linux/hppa/bits/atomic.h @@ -20,7 +20,7 @@ #include <errno.h> #include <bits/kernel-features.h> -#define ABORT_INSTRUCTION __asm__(__UCLIBC_ABORT_INSTRUCTION__) +#define ABORT_INSTRUCTION __asm__("iitlbp %r0,(%sr0, %r0)") /* We need EFAULT, ENOSYS */ #if !defined EFAULT && !defined ENOSYS @@ -58,7 +58,6 @@ typedef uintmax_t uatomic_max_t; #define LWS_CLOBBER "r1", "r26", "r25", "r24", "r23", "r22", "r21", "r20", "r28", "r31", "memory" #define ASM_EAGAIN "11" -#if __ASSUME_LWS_CAS /* The only basic operation needed is compare and exchange. */ # define atomic_compare_and_exchange_val_acq(mem, newval, oldval) \ ({ \ @@ -94,10 +93,6 @@ typedef uintmax_t uatomic_max_t; /* Return 1 if it was already acquired */ \ (ret != oldval); \ }) -#else -# error __ASSUME_LWS_CAS is required to build uClibc. -#endif -/* __ASSUME_LWS_CAS */ #endif /* _BITS_ATOMIC_H */ diff --git a/libc/sysdeps/linux/hppa/bits/mman.h b/libc/sysdeps/linux/hppa/bits/mman.h index ca2787f..cbde4b8 100644 --- a/libc/sysdeps/linux/hppa/bits/mman.h +++ b/libc/sysdeps/linux/hppa/bits/mman.h @@ -1,5 +1,5 @@ /* Definitions for POSIX memory map interface. Linux/HPPA version. - Copyright (C) 1997, 1998, 2000, 2003 Free Software Foundation, Inc. + Copyright (C) 1997-2015 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -13,19 +13,19 @@ Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see + License along with the GNU C Library. If not, see <http://www.gnu.org/licenses/>. */ #ifndef _SYS_MMAN_H # error "Never use <bits/mman.h> directly; include <sys/mman.h> instead." #endif -/* these are basically taken from the kernel definitions */ +/* These are taken from the kernel definitions. */ -#define PROT_READ 0x1 /* page can be read */ -#define PROT_WRITE 0x2 /* page can be written */ -#define PROT_EXEC 0x4 /* page can be executed */ -#define PROT_NONE 0x0 /* page can not be accessed */ +#define PROT_READ 0x1 /* Page can be read */ +#define PROT_WRITE 0x2 /* Page can be written */ +#define PROT_EXEC 0x4 /* Page can be executed */ +#define PROT_NONE 0x0 /* Page can not be accessed */ #define PROT_GROWSDOWN 0x01000000 /* Extend change to start of growsdown vma (mprotect only). */ #define PROT_GROWSUP 0x02000000 /* Extend change to start of @@ -33,61 +33,83 @@ #define MAP_SHARED 0x01 /* Share changes */ #define MAP_PRIVATE 0x02 /* Changes are private */ -#define MAP_TYPE 0x03 /* Mask for type of mapping */ +#ifdef __USE_MISC +# define MAP_TYPE 0x03 /* Mask for type of mapping */ +#endif + +/* Other flags. */ #define MAP_FIXED 0x04 /* Interpret addr exactly */ -#define MAP_ANONYMOUS 0x10 /* don't use a file */ +#ifdef __USE_MISC +# define MAP_FILE 0x0 +# define MAP_ANONYMOUS 0x10 /* Don't use a file */ +# define MAP_ANON MAP_ANONYMOUS +# define MAP_VARIABLE 0 +/* When MAP_HUGETLB is set bits [26:31] encode the log2 of the huge page size. */ +# define MAP_HUGE_SHIFT 26 +# define MAP_HUGE_MASK 0x3f +#endif + +/* These are Linux-specific. */ +#ifdef __USE_MISC +# define MAP_DENYWRITE 0x0800 /* ETXTBSY */ +# define MAP_EXECUTABLE 0x1000 /* Mark it as an executable */ +# define MAP_LOCKED 0x2000 /* Pages are locked */ +# define MAP_NORESERVE 0x4000 /* Don't check for reservations */ +# define MAP_GROWSDOWN 0x8000 /* Stack-like segment */ +# define MAP_POPULATE 0x10000 /* Populate (prefault) pagetables */ +# define MAP_NONBLOCK 0x20000 /* Do not block on IO */ +#endif -#define MAP_DENYWRITE 0x0800 /* ETXTBSY */ -#define MAP_EXECUTABLE 0x1000 /* mark it as an executable */ -#define MAP_LOCKED 0x2000 /* pages are locked */ -#define MAP_NORESERVE 0x4000 /* don't check for reservations */ -#define MAP_GROWSDOWN 0x8000 /* stack-like segment */ -#define MAP_POPULATE 0x10000 /* populate (prefault) pagetables */ -#define MAP_NONBLOCK 0x20000 /* do not block on IO */ -#define MAP_UNINITIALIZED 0x4000000 /* For anonymous mmap, memory could - be uninitialized. */ +/* Flags to "msync" */ +#define MS_SYNC 1 /* Synchronous memory sync */ +#define MS_ASYNC 2 /* Sync memory asynchronously */ +#define MS_INVALIDATE 4 /* Invalidate the caches */ -#define MS_SYNC 1 /* synchronous memory sync */ -#define MS_ASYNC 2 /* sync memory asynchronously */ -#define MS_INVALIDATE 4 /* invalidate the caches */ +/* Flags to "mlockall" */ +#define MCL_CURRENT 1 /* Lock all current mappings */ +#define MCL_FUTURE 2 /* Lock all future mappings */ -#define MCL_CURRENT 1 /* lock all current mappings */ -#define MCL_FUTURE 2 /* lock all future mappings */ +/* Flags for `mremap'. */ +#ifdef __USE_GNU +# define MREMAP_MAYMOVE 1 +# define MREMAP_FIXED 2 +#endif -/* Advice to "madvise" */ -#ifdef __USE_BSD -# define MADV_NORMAL 0 /* no further special treatment */ -# define MADV_RANDOM 1 /* expect random page references */ -# define MADV_SEQUENTIAL 2 /* expect sequential page references */ -# define MADV_WILLNEED 3 /* will need these pages */ -# define MADV_DONTNEED 4 /* dont need these pages */ -# define MADV_SPACEAVAIL 5 /* insure that resources are reserved */ +/* Advice to "madvise" */ +#ifdef __USE_MISC +# define MADV_NORMAL 0 /* No further special treatment */ +# define MADV_RANDOM 1 /* Expect random page references */ +# define MADV_SEQUENTIAL 2 /* Expect sequential page references */ +# define MADV_WILLNEED 3 /* Will need these pages */ +# define MADV_DONTNEED 4 /* Dont need these pages */ +# define MADV_SPACEAVAIL 5 /* Insure that resources are reserved */ # define MADV_VPS_PURGE 6 /* Purge pages from VM page cache */ # define MADV_VPS_INHERIT 7 /* Inherit parents page size */ # define MADV_REMOVE 9 /* Remove these pages and resources. */ # define MADV_DONTFORK 10 /* Do not inherit across fork. */ # define MADV_DOFORK 11 /* Do inherit across fork. */ +# define MADV_MERGEABLE 65 /* KSM may merge identical pages */ +# define MADV_UNMERGEABLE 66 /* KSM may not merge identical pages */ #endif /* The range 12-64 is reserved for page size specification. */ -#define MADV_4K_PAGES 12 /* Use 4K pages */ -#define MADV_16K_PAGES 14 /* Use 16K pages */ -#define MADV_64K_PAGES 16 /* Use 64K pages */ -#define MADV_256K_PAGES 18 /* Use 256K pages */ -#define MADV_1M_PAGES 20 /* Use 1 Megabyte pages */ -#define MADV_4M_PAGES 22 /* Use 4 Megabyte pages */ -#define MADV_16M_PAGES 24 /* Use 16 Megabyte pages */ -#define MADV_64M_PAGES 26 /* Use 64 Megabyte pages */ - -/* compatibility flags */ -#define MAP_ANON MAP_ANONYMOUS -#define MAP_FILE 0 -#define MAP_VARIABLE 0 - -/* Flags for `mremap'. */ -#ifdef __USE_GNU -# define MREMAP_MAYMOVE 1 -# define MREMAP_FIXED 2 +/* These are Linux-specific. */ +#ifdef __USE_MISC +# define MADV_4K_PAGES 12 /* Use 4K pages. */ +# define MADV_16K_PAGES 14 /* Use 16K pages. */ +# define MADV_64K_PAGES 16 /* Use 64K pages. */ +# define MADV_256K_PAGES 18 /* Use 256K pages. */ +# define MADV_1M_PAGES 20 /* Use 1 Megabyte pages. */ +# define MADV_4M_PAGES 22 /* Use 4 Megabyte pages. */ +# define MADV_16M_PAGES 24 /* Use 16 Megabyte pages. */ +# define MADV_64M_PAGES 26 /* Use 64 Megabyte pages. */ #endif - +/* The POSIX people had to invent similar names for the same things. */ +#ifdef __USE_XOPEN2K +# define POSIX_MADV_NORMAL 0 /* No further special treatment. */ +# define POSIX_MADV_RANDOM 1 /* Expect random page references. */ +# define POSIX_MADV_SEQUENTIAL 2 /* Expect sequential page references. */ +# define POSIX_MADV_WILLNEED 3 /* Will need these pages. */ +# define POSIX_MADV_DONTNEED 4 /* Don't need these pages. */ +#endif diff --git a/libc/sysdeps/linux/hppa/sys/procfs.h b/libc/sysdeps/linux/hppa/sys/procfs.h index 24e4c31..8d12dfb 100644 --- a/libc/sysdeps/linux/hppa/sys/procfs.h +++ b/libc/sysdeps/linux/hppa/sys/procfs.h @@ -1,4 +1,4 @@ -/* Copyright (C) 1996, 1997, 1999, 2000 Free Software Foundation, Inc. +/* Copyright (C) 1996-2015 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -12,7 +12,7 @@ Lesser General Public License for more details. You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see + License along with the GNU C Library. If not, see <http://www.gnu.org/licenses/>. */ #ifndef _SYS_PROCFS_H @@ -28,15 +28,21 @@ GDB unless you know what you are doing. */ #include <features.h> -#include <signal.h> #include <sys/time.h> #include <sys/types.h> -#include <sys/ucontext.h> #include <sys/user.h> -#include <asm/elf.h> __BEGIN_DECLS +typedef unsigned long elf_greg_t; +#define ELF_NGREG 80 /* We only need 64 at present, but leave space + for expansion. */ +typedef elf_greg_t elf_gregset_t[ELF_NGREG]; + +#define ELF_NFPREG 32 +typedef double elf_fpreg_t; +typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; + struct elf_siginfo { int si_signo; /* Signal number. */ diff --git a/libc/sysdeps/linux/hppa/sys/user.h b/libc/sysdeps/linux/hppa/sys/user.h new file mode 100644 index 0000000..c871f1a --- /dev/null +++ b/libc/sysdeps/linux/hppa/sys/user.h @@ -0,0 +1 @@ +/* This file is not needed, but in practice gdb might try to include it. */ diff --git a/libpthread/linuxthreads/sysdeps/hppa/pspinlock.c b/libpthread/linuxthreads.old/sysdeps/hppa/pspinlock.c similarity index 100% copy from libpthread/linuxthreads/sysdeps/hppa/pspinlock.c copy to libpthread/linuxthreads.old/sysdeps/hppa/pspinlock.c diff --git a/libpthread/linuxthreads/sysdeps/hppa/pt-machine.h b/libpthread/linuxthreads.old/sysdeps/hppa/pt-machine.h similarity index 100% copy from libpthread/linuxthreads/sysdeps/hppa/pt-machine.h copy to libpthread/linuxthreads.old/sysdeps/hppa/pt-machine.h hooks/post-receive -- uClibc-ng - small C library for embedded systems

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[PATCH] tests: Extend OMIT LDFLAGS logic to test binaries too
by Leonid Lisovskiy 22 Jan '16

22 Jan '16

In continue of 72215487 "tests: add OMIT logic to remove compilation flag." commit. Signed-off-by: Leonid Lisovskiy <lly.dev(a)gmail.com> --- test/Test.mak | 5 +++-- 1 file changed, 3 insertions(+), 2 deletions(-) diff --git a/test/Test.mak b/test/Test.mak index 98939e7..c1b34a7 100644 --- a/test/Test.mak +++ b/test/Test.mak @@ -121,14 +121,15 @@ MAKE_SRCS := Makefile $(TESTDIR)Makefile $(TESTDIR)Rules.mak $(TESTDIR)Test.mak $(U_TARGETS): $(U_TARGET_SRCS) $(MAKE_SRCS) $(showlink) $(Q)$(CC) $(filter-out $(CFLAGS-OMIT-$@),$(CFLAGS)) $(EXTRA_CFLAGS) $(CFLAGS_$(notdir $(CURDIR))) $(CFLAGS_$@) -c $@.c -o $@.o - $(Q)$(CC) $(LDFLAGS) $@.o -o $@ $(EXTRA_LDFLAGS) $(LDFLAGS_$@) + $(Q)$(CC) $(filter-out $(LDFLAGS-OMIT-$@),$(LDFLAGS)) $@.o -o $@ $(EXTRA_LDFLAGS) $(LDFLAGS_$@) $(G_TARGETS): $(U_TARGET_SRCS) $(MAKE_SRCS) $(showlink) $(Q)$(HOSTCC) $(filter-out $(HOST_CFLAGS-OMIT-$(patsubst %_glibc,%,$@)),$(HOST_CFLAGS)) \ $(CFLAGS_$(notdir $(CURDIR))) $(CFLAGS_$(patsubst %_glibc,%,$@)) \ -c $(patsubst %_glibc,%,$(a)).c -o $@.o - $(Q)$(HOSTCC) $(HOST_LDFLAGS) $@.o -o $@ $(EXTRA_LDFLAGS) $(LDFLAGS_$(patsubst %_glibc,%,$@)) $(LDFLAGS_$@) + $(Q)$(HOSTCC) $(filter-out $(LDFLAGS-OMIT-$(patsubst %_glibc,%,$@)),$(HOST_LDFLAGS)) \ + $@.o -o $@ $(EXTRA_LDFLAGS) $(LDFLAGS_$(patsubst %_glibc,%,$@)) $(LDFLAGS_$@) shell_%: -- 1.8.5.6

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Re: [uclibc-ng-devel] OpenJDK-8 crash when starting BubbleUPnPServer
by Leonid Lisovskiy 22 Jan '16

22 Jan '16

On Tue, Dec 29, 2015 at 9:18 PM, Alex Potapenko <opotapenko(a)gmail.com> wrote: > > I'm unable to get core dump due to system limitations (it's a router): > I run `ulimit -c unlimited`, yet core dump is never to be found on the > system after crash :( Looks like your kernel config simply disables core dumps, just check that CONFIG_ELF_CORE parameter is set to yes. > Using gdb, I got this: > > #0 0x4004c05c in _dl_debug_state () from /opt/lib/ld-uClibc.so.1 > No symbol table info available. > #1 0x40050394 in _dl_get_ready_to_run () from /opt/lib/ld-uClibc.so.1 > No symbol table info available. > #2 0x40050864 in ?? () from /opt/lib/ld-uClibc.so.1 > No symbol table info available. > Backtrace stopped: previous frame identical to this frame (corrupt stack?) Just gdb notification, non informative. > I then installed non-stripped uclibc-ng, libffi and openjdk8 > libraries, and got a more informative output (see gdb.log attached). > Yes, it is much better (gdb.log): ... Program received signal SIGSEGV, Segmentation fault. [Switching to Thread 0x40ac24d0 (LWP 15709)] 0x4010c804 in initLocalIfs () from /opt/lib/openjdk8/arm/libnet.so (gdb) bt full #0 0x4010c804 in initLocalIfs () from /opt/lib/openjdk8/arm/libnet.so No symbol table info available. #1 0x4010b3f4 in JNI_OnLoad () from /opt/lib/openjdk8/arm/libnet.so No symbol table info available. #2 0x40135de0 in Java_java_lang_ClassLoader_00024NativeLibrary_load () from /opt/lib/jvm/openjdk8/jre/lib/arm/libjava.so No symbol table info available. #3 0x401a433c in ffi_call_SYSV () from /opt/lib/libffi.so.6 No symbol table info available. #4 0x401a5a54 in ffi_call () from /opt/lib/libffi.so.6 No symbol table info available. #5 0x404c1640 in CppInterpreter::native_entry(Method*, int, Thread*) () from /opt/lib/jvm/openjdk8/jre/lib/arm/server/libjvm.so ... but points inside the OpenJDK native code. I'm found initLocalIfs() function at jdk/src/solaris/native/java/net/net_util_md.c - very strange for me, since you are running on linux. Probably, it is due I'm not familiar with OpenJDK internals. Anyway, are you able to: 1) update OpenJDK to latest jdk8u76-b01 & uClibc-ng to 1.0.10 ? 2) disable use of IPv6 at all, to exclude any chance of read of "/proc/net/if_inet6" in initLocalIfs() ? 3) compile only libnet.so with -g3 switch to get a much more of debug info ? P.S. You forgot to select "Reply all" to allow anyone see your mail in mailing list Leonid

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