devel July 2018

devel@uclibc-ng.org

8 participants
5 discussions

uclibc-ng-test and math complex functions
by Laurent Thévenoux 20 Dec '18

20 Dec '18

Hi, I'm trying to build uclibc-ng-test, but I can't link with complex trigo functions (such as cacos, casin, catan, etc.). They are required for the following test targets: test-double, test-double-finite, test-float, test-float-finite, test-idouble, and test-ifloat. They are declared in uclibc-ng/sysdeps/linux/common/bits/cmathcalls.h, but I can't find their definitions. Does uclibc-ng define them? Thanks, -- Laurent Thévenoux lthevenoux(a)kalray.eu Kalray S.A. 180 Avenue de l'Europe 38330 Montbonnot FRANCE

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[PATCH] Fix path to file libtest31.so
by Nikita Sobolev 16 Aug '18

16 Aug '18

From: Nikita Sobolev <sobolev(a)synopsys.com> Test failed with error 'Could not open libtest31.so: File not found'. dlopen function is trying to find libtest31.so in the same directory where the test is run. But libtest31.so is lockated in testlib directory. So fix changes the path to library. Signed-off-by: Nikita Sobolev <Nikita.Sobolev(a)synopsys.com> --- test/dlopen/tst-origin.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-) diff --git a/test/dlopen/tst-origin.c b/test/dlopen/tst-origin.c index 60fcd3f..e456f1e 100644 --- a/test/dlopen/tst-origin.c +++ b/test/dlopen/tst-origin.c @@ -12,13 +12,13 @@ int main(int argc, char **argv) { int __attribute__((unused))(*mydltest)(const char *s); char *error; - h1 = dlopen ("libtest31.so", RTLD_LAZY); + h1 = dlopen ("testlib/libtest31.so", RTLD_LAZY); if (!h1) { fprintf(stderr, "Could not open libtest31.so: %s\n", dlerror()); exit(1); } - h2 = dlopen ("libtest31.so", RTLD_NOLOAD); + h2 = dlopen ("testlib/libtest31.so", RTLD_NOLOAD); if (!h2) { fprintf(stderr, "Could not open libtest31.so(RTLD_NOLOAD): %s\n", dlerror()); exit(1); -- 2.16.2

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[PATCH 00/32] FDPIC ABI for ARM
by Christophe Lyon 10 Aug '18

10 Aug '18

Hello, This patch series implements the uClibc-ng contribution of the FDPIC ABI for ARM targets. This ABI enables to run Linux on ARM MMU-less cores and supports shared libraries to reduce the memory footprint. Without MMU, text and data segments relative distances are different from one process to another, hence the need for a dedicated FDPIC register holding the start address of the data segment. One of the side effects is that function pointers require two words to be represented: the address of the code, and the data segment start address. These two words are designated as "Function Descriptor", hence the "FD PIC" name. On ARM, the FDPIC register is r9 [1], and the target name is arm-uclinuxfdpiceabi. Note that arm-uclinux exists, but uses another ABI and the BFLAT file format; it does not support code sharing. This work was developed some time ago by STMicroelectronics, and was presented during Linaro Connect SFO15 (September 2015). You can watch the discussion and read the slides [2]. This presentation was related to the toolchain published on github [3], which is based on binutils-2.22, gcc-4.7, uclibc-0.9.33.2, gdb-7.5.1 and qemu-2.3.0, and for which pre-built binaries are available [3]. The ABI itself is described in details in [1]. Our Linux kernel patches have been updated and committed by Nicolas Pitre (Linaro) in July 2017. They are required so that the loader is able to handle this new file type. Indeed, the ELF files are tagged with ELFOSABI_ARM_FDPIC. This new tag has been allocated by ARM, as well as the new relocations involved. The binutils and QEMU patch series have been merged recently. [4][5] The GCC patch series has been submitted and is under discussion. [6] This patch series consists in the original uClibc-based patches, which I have rebased and updated for uClibc-ng. Most of them are strictly related to FDPIC on ARM, while a few others address generic issues. Are the uClibc-ng patches OK for inclusion in master? Thanks, Christophe. [1] https://github.com/mickael-guene/fdpic_doc/blob/master/abi.txt [2] http://connect.linaro.org/resource/sfo15/sfo15-406-arm-fdpic-toolset-kernel… [3] https://github.com/mickael-guene/fdpic_manifest [4] https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;a=commit;h=f1ac0af… [5] https://git.qemu.org/?p=qemu.git;a=commit;h=e8fa72957419c11984608062c7dcb20… [6] https://gcc.gnu.org/ml/gcc-patches/2018-05/msg01439.html Christophe Lyon (32): [ARM][FDPIC] Allow to select FDPIC ELF for arm architecture [FDPIC] rtld: Do not protect RELRO segments when we don't use an MMU. [ARM][FDPIC] rtld: Add #if defined (__FDPIC__) [ARM][FDPIC] rtld: Add FDPIC code for arm [ARM][FDPIC] rtld: Avoid FUNCDESC relocation on _start [ARM][FDPIC] rtld: Add startup code [ARM] Fix bug in _dl_pread when using pread64 syscall [ARM][FDPIC] Add application startup code for FDPIC [ARM][FDPIC] Add runtime support needed for C++ exceptions [ARM][FDPIC] Allow to generate PIE 'static' binary [ARM][FDPIC] rtld: Add lazy binding support [ARM][FDPIC] TLS: fix relocation computation [ARM][FDPIC] rtld: Compile with -fno-unwind-tables -fno-asynchronous-unwind-tables [ARM][FDPIC] arm/clone.S: Fix threading support [ARM][FDPIC] enable NPTL on TARGET_arm [ARM][FDPIC] rtld: Use ELF_RTYPE_CLASS_DLSYM [FDPIC] rtld: Initialize _dl_error_catch_tsd without FUNCDESC relocation [FDPIC] nptl: disable mprotect usage in stack protection [FDPIC] nptl: Disable fork and atfork on MMU-less systems. [FDPIC] nptl: Do not use madvise [ARM][FDPIC] nptl: Use linker-defined symbol to find start of .tdata section. [FDPIC] nptl: Allow sem_open to work on MMU-less systems [FDPIC] nptl: Add pthread_mutex_getprioceiling and pthread_mutex_setprioceiling support [FDPIC] nptl: Use vfork on MMU-less for system() nptl: Clear TLS area for static binaries. [FDPIC] nptl: Replace sbrk with mmap nptl threads: Fix bug in using a weak variable. Fix htab_delete loop counter isnan: Add isnan weak alias to __isnan mbtowc: Fix non compliant behavior for end of string Fix shm_open posix compliance error code [ARM] rtld: Avoid crash on R_ARM_NONE relocation extra/Configs/Config.in | 2 +- extra/Configs/Config.in.arch | 2 +- include/elf.h | 2 + include/link.h | 6 +- ldso/include/dl-elf.h | 2 +- ldso/include/dl-hash.h | 2 +- ldso/include/dl-string.h | 3 +- ldso/include/dl-syscall.h | 13 +- ldso/include/inline-hashtab.h | 2 +- ldso/ldso/Makefile.in | 2 - ldso/ldso/arm/dl-inlines.h | 1 + ldso/ldso/arm/dl-startup.h | 112 +++++++++++++- ldso/ldso/arm/dl-sysdep.h | 63 ++++++-- ldso/ldso/arm/elfinterp.c | 166 +++++++++++++++++---- ldso/ldso/arm/resolve.S | 23 +++ ldso/ldso/dl-elf.c | 6 +- ldso/ldso/dl-hash.c | 4 +- ldso/ldso/dl-tls.c | 1 + ldso/ldso/fdpic/dl-inlines.h | 2 + ldso/ldso/fdpic/dl-sysdep.h | 2 +- ldso/ldso/ldso.c | 23 ++- libc/misc/elf/dl-iterate-phdr.c | 2 +- libc/misc/internals/__uClibc_main.c | 47 +++++- libc/stdlib/stdlib.c | 6 +- libc/stdlib/system.c | 5 + libc/sysdeps/linux/arm/Makefile.arch | 2 +- libc/sysdeps/linux/arm/bits/elf-fdpic.h | 114 ++++++++++++++ libc/sysdeps/linux/arm/clone.S | 12 ++ libc/sysdeps/linux/arm/crt1.S | 66 ++++++++ libc/sysdeps/linux/arm/crtreloc.c | 144 ++++++++++++++++++ libc/sysdeps/linux/arm/find_exidx.c | 38 +++++ libc/sysdeps/linux/arm/find_got.c | 72 +++++++++ libm/s_isnan.c | 1 + libpthread/nptl/Makefile.in | 1 - libpthread/nptl/allocatestack.c | 6 + libpthread/nptl/linux_fsinfo.h | 5 +- libpthread/nptl/pthread_create.c | 4 + libpthread/nptl/sem_open.c | 8 +- libpthread/nptl/sysdeps/generic/libc-tls.c | 27 +++- libpthread/nptl/sysdeps/unix/sysv/linux/fork.c | 3 + .../sysdeps/unix/sysv/linux/libc_pthread_init.c | 4 + .../nptl/sysdeps/unix/sysv/linux/register-atfork.c | 14 +- .../sysdeps/unix/sysv/linux/unregister-atfork.c | 10 +- librt/shm.c | 3 + 44 files changed, 958 insertions(+), 75 deletions(-) create mode 100644 ldso/ldso/arm/dl-inlines.h create mode 100644 libc/sysdeps/linux/arm/bits/elf-fdpic.h create mode 100644 libc/sysdeps/linux/arm/crtreloc.c create mode 100644 libc/sysdeps/linux/arm/find_got.c -- 2.6.3

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[uclibc-ng-test] Revert "arc: disable deadlocking test"
by Vineet Gupta 21 Jul '18

21 Jul '18

This seems to work fine on ARC ! This reverts commit f0567d67075ff7a27ada8ab5bce750fe8a739763. Signed-off-by: Vineet Gupta <vgupta(a)synopsys.com> --- test/nptl/Makefile.in | 5 ----- 1 file changed, 5 deletions(-) diff --git a/test/nptl/Makefile.in b/test/nptl/Makefile.in index 761f52db8366..35859f944911 100644 --- a/test/nptl/Makefile.in +++ b/test/nptl/Makefile.in @@ -1,11 +1,6 @@ # uClibc-ng NPTL tests # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball. -# deadlock -ifeq ($(TARGET_ARCH),arc) -TESTS_DISABLED := tst-cond16 -endif - ifeq ($(TARGET_ARCH),metag) TESTS_DISABLED := tst-cleanup0 tst-cleanupx0 endif -- 2.7.4

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[PATCH 30/32] mbtowc: Fix non compliant behavior for end of string
by Christophe Lyon 04 Jul '18

04 Jul '18

Match glibc behavior. * libc/stdlib/stdlib.c (mbtowc): Fix end of string behavior. Signed-off-by: Mickaël Guêné <mickael.guene(a)st.com> Signed-off-by: Christophe Lyon <christophe.lyon(a)st.com> diff --git a/libc/stdlib/stdlib.c b/libc/stdlib/stdlib.c index 075e6e5..f593663 100644 --- a/libc/stdlib/stdlib.c +++ b/libc/stdlib/stdlib.c @@ -895,9 +895,13 @@ int mbtowc(wchar_t *__restrict pwc, register const char *__restrict s, size_t n) return is_stateful(ENCODING); } - if (*s == '\0') + if (*s == '\0') { /* According to the ISO C 89 standard this is the expected behaviour. */ + /* Standard not very clear here, so do like glibc. */ + if (pwc != NULL) + *pwc = L'\0'; return 0; + } if ((r = mbrtowc(pwc, s, n, &state)) == (size_t) -2) { /* TODO: Should we set an error state? */ -- 2.6.3

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