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uClibc-ng - small C library for embedded systems branch master updated. v1.0.12-23-g3c14571
by wbx＠helium.waldemar-brodkorb.de 10 Mar '16

10 Mar '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, master has been updated via 3c1457161e5206c2d576ab25d350a139511c096d (commit) via 8c85b44f6ab42561207365f19b9d1fd69d960771 (commit) via 2ac8348609b63d6f3a87cb27ce17deff889c6a73 (commit) from 3c67c044f93b452aa483eb1246195ebb4443cb44 (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 3c1457161e5206c2d576ab25d350a139511c096d Author: Peter Korsgaard <peter(a)korsgaard.com> Date: Wed Mar 9 22:49:07 2016 +0100 getaddrinfo: correct AI_V4MAPPED handling As recently reported on the Buildroot list: http://lists.busybox.net/pipermail/buildroot/2016-March/155325.html DNS lookups with Node.js currently fails on uClibc-ng. The reason for this is the way AI_V4MAPPED is handled. According to POSIX, AI_V4MAPPED should be ignored unless ai_family is AF_INET6: http://pubs.opengroup.org/onlinepubs/9699919799/functions/freeaddrinfo.html If the AI_V4MAPPED flag is specified along with an ai_family of AF_INET6, then getaddrinfo() shall return IPv4-mapped IPv6 addresses on finding no matching IPv6 addresses (ai_addrlen shall be 16). The AI_V4MAPPED flag shall be ignored unless ai_family equals AF_INET6. uClibc-ng was also handling AI_V4MAPPED for AF_UNSPEC, fix that. Signed-off-by: Peter Korsgaard <peter(a)korsgaard.com> commit 8c85b44f6ab42561207365f19b9d1fd69d960771 Author: Tim Hockin <thockin(a)google.com> Date: Wed Mar 9 22:12:23 2016 +0100 DNS: Don't apply search domains to PTR lookups This lessens the load on upstream DNS servers (and it was just nonsensical). Signed-off-by: Tim Hockin <thockin(a)google.com> commit 2ac8348609b63d6f3a87cb27ce17deff889c6a73 Author: Tim Hockin <thockin(a)google.com> Date: Wed Mar 9 21:48:32 2016 +0100 DNS: don't count search-path miss as a retry Currently a miss on a search-path entry is counted as a retry. This means that users with more than (num_nameservers * retries) entries in their search path list fail before trying all search paths. Concretely, a single nameserver with 4 search paths will never try the 4th search because the default retry is 3. The code doesn't currently retry a given nameserver in case of an error, so retries is sort of meaningless (though there are some comments indicating it might come). This change only treats total failure of a nameserver (try next server) as a retry. Signed-off-by: Tim Hockin <thockin(a)google.com> ----------------------------------------------------------------------- Summary of changes: libc/inet/getaddrinfo.c | 3 +-- libc/inet/resolv.c | 8 +++++--- 2 files changed, 6 insertions(+), 5 deletions(-) diff --git a/libc/inet/getaddrinfo.c b/libc/inet/getaddrinfo.c index 090d7e9..7ae32be 100644 --- a/libc/inet/getaddrinfo.c +++ b/libc/inet/getaddrinfo.c @@ -404,8 +404,7 @@ gaih_inet(const char *name, const struct gaih_service *service, struct gaih_servtuple *st; struct gaih_addrtuple *at; int rc; - int v4mapped = (req->ai_family == PF_UNSPEC || req->ai_family == PF_INET6) - && (req->ai_flags & AI_V4MAPPED); + int v4mapped = req->ai_family == PF_INET6 && (req->ai_flags & AI_V4MAPPED); unsigned seen = 0; if (req->ai_flags & AI_ADDRCONFIG) { /* "seen" is only used when AI_ADDRCONFIG is specified. diff --git a/libc/inet/resolv.c b/libc/inet/resolv.c index 4b33896..f378c9b 100644 --- a/libc/inet/resolv.c +++ b/libc/inet/resolv.c @@ -1264,7 +1264,7 @@ int __dns_lookup(const char *name, int variant = -1; /* search domain to append, -1: none */ int local_ns_num = -1; /* Nth server to use */ int local_id = local_id; /* for compiler */ - int sdomains; + int sdomains = 0; bool ends_with_dot; sockaddr46_t sa; @@ -1302,7 +1302,9 @@ int __dns_lookup(const char *name, * or do other Really Bad Things. */ __UCLIBC_MUTEX_LOCK(__resolv_lock); __open_nameservers(); - sdomains = __searchdomains; + if (type != T_PTR) { + sdomains = __searchdomains; + } lookup[name_len] = '\0'; if ((unsigned)variant < sdomains) { /* lookup is name_len + 1 + MAXLEN_searchdomain + 1 long */ @@ -1320,7 +1322,6 @@ int __dns_lookup(const char *name, local_ns_num = last_ns_num; retries_left = __nameservers * __resolv_attempts; } - retries_left--; if (local_ns_num >= __nameservers) local_ns_num = 0; local_id++; @@ -1572,6 +1573,7 @@ int __dns_lookup(const char *name, try_next_server: /* Try next nameserver */ + retries_left--; local_ns_num++; variant = -1; } while (retries_left > 0); hooks/post-receive -- uClibc-ng - small C library for embedded systems

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uClibc-ng - small C library for embedded systems branch master updated. v1.0.12-20-g3c67c04
by wbx＠helium.waldemar-brodkorb.de 10 Mar '16

10 Mar '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, master has been updated via 3c67c044f93b452aa483eb1246195ebb4443cb44 (commit) via fbb7168a0109ec23662953625d38de09d2642d77 (commit) from a8187cd20769fd1a4dddbb51d86363eb80b40b9d (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 3c67c044f93b452aa483eb1246195ebb4443cb44 Author: Waldemar Brodkorb <wbx(a)openadk.org> Date: Thu Mar 10 21:49:36 2016 +0100 ia64: sync with glibc headers commit fbb7168a0109ec23662953625d38de09d2642d77 Author: Waldemar Brodkorb <wbx(a)openadk.org> Date: Thu Mar 10 21:49:19 2016 +0100 ia64: disable atomic tests ----------------------------------------------------------------------- Summary of changes: libc/sysdeps/linux/ia64/bits/sigcontext.h | 2 ++ libc/sysdeps/linux/ia64/sys/ucontext.h | 2 +- test/silly/Makefile.in | 4 ++++ 3 files changed, 7 insertions(+), 1 deletion(-) diff --git a/libc/sysdeps/linux/ia64/bits/sigcontext.h b/libc/sysdeps/linux/ia64/bits/sigcontext.h index 97410db..6c2b521 100644 --- a/libc/sysdeps/linux/ia64/bits/sigcontext.h +++ b/libc/sysdeps/linux/ia64/bits/sigcontext.h @@ -24,6 +24,8 @@ #ifndef _BITS_SIGCONTEXT_H #define _BITS_SIGCONTEXT_H 1 +#define __need_size_t +#include <stddef.h> #include <bits/sigstack.h> struct ia64_fpreg diff --git a/libc/sysdeps/linux/ia64/sys/ucontext.h b/libc/sysdeps/linux/ia64/sys/ucontext.h index 8525007..ef56567 100644 --- a/libc/sysdeps/linux/ia64/sys/ucontext.h +++ b/libc/sysdeps/linux/ia64/sys/ucontext.h @@ -31,7 +31,7 @@ typedef struct sigcontext mcontext_t; -#if defined __cplusplus && __GNUC_PREREQ (3, 5) +#if __GNUC_PREREQ (3, 5) # define _SC_GR0_OFFSET \ __builtin_offsetof (struct sigcontext, sc_gr[0]) #elif defined __GNUC__ diff --git a/test/silly/Makefile.in b/test/silly/Makefile.in index 4f35368..c477344 100644 --- a/test/silly/Makefile.in +++ b/test/silly/Makefile.in @@ -4,6 +4,10 @@ RET_hello := 42 RET_tiny := 42 +ifeq ($(TARGET_ARCH),ia64) +TESTS_DISABLED += tst-atomic tst-atomic-long +endif + ifeq ($(TARGET_ARCH),mips) TESTS_DISABLED += tst-atomic tst-atomic-long endif hooks/post-receive -- uClibc-ng - small C library for embedded systems

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DNS reverse lookups are subject to search path expansion
by Tim Hockin 02 Mar '16

02 Mar '16

This seems wrong to me. The simplest answer seems to be a flag to __dns_lookup() indicating whether or not to allow search paths. Is that an acceptable change, or is there something better to do?

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[PATCH] arm: fix __JMP_BUF_SP definition
by Max Filippov 02 Mar '16

02 Mar '16

__JMP_BUF_SP is the index of a stack pointer slot in the __jmp_buf. According to ARM __sigsetjmp code it does not depend on configuration parameter __UCLIBC_HAS_FPU__. Make its definition unconditional. __JMP_BUF_SP is used in the unwind_stop through the _JMPBUF_CFA_UNWINDS_ADJ macro, this change fixes cleanup routines call on thread cancellation in configurations with hard FP. Signed-off-by: Max Filippov <jcmvbkbc(a)gmail.com> --- libc/sysdeps/linux/arm/jmpbuf-offsets.h | 4 ---- 1 file changed, 4 deletions(-) diff --git a/libc/sysdeps/linux/arm/jmpbuf-offsets.h b/libc/sysdeps/linux/arm/jmpbuf-offsets.h index f0e587f..93b50af 100644 --- a/libc/sysdeps/linux/arm/jmpbuf-offsets.h +++ b/libc/sysdeps/linux/arm/jmpbuf-offsets.h @@ -16,8 +16,4 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ -#ifdef __UCLIBC_HAS_FPU__ -#define __JMP_BUF_SP 20 -#else #define __JMP_BUF_SP 8 -#endif -- 2.1.4

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uClibc-ng - small C library for embedded systems branch master updated. v1.0.12-18-ga8187cd
by wbx＠helium.waldemar-brodkorb.de 29 Feb '16

29 Feb '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, master has been updated via a8187cd20769fd1a4dddbb51d86363eb80b40b9d (commit) from c8d441345fb301e6f5aa828f217d377dbc4f252b (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 a8187cd20769fd1a4dddbb51d86363eb80b40b9d Author: Max Filippov <jcmvbkbc(a)gmail.com> Date: Sun Feb 28 22:46:11 2016 +0300 arm: fix __JMP_BUF_SP definition __JMP_BUF_SP is the index of a stack pointer slot in the __jmp_buf. According to ARM __sigsetjmp code it does not depend on configuration parameter __UCLIBC_HAS_FPU__. Make its definition unconditional. __JMP_BUF_SP is used in the unwind_stop through the _JMPBUF_CFA_UNWINDS_ADJ macro, this change fixes cleanup routines call on thread cancellation in configurations with hard FP. Signed-off-by: Max Filippov <jcmvbkbc(a)gmail.com> ----------------------------------------------------------------------- Summary of changes: libc/sysdeps/linux/arm/jmpbuf-offsets.h | 4 ---- 1 file changed, 4 deletions(-) diff --git a/libc/sysdeps/linux/arm/jmpbuf-offsets.h b/libc/sysdeps/linux/arm/jmpbuf-offsets.h index f0e587f..93b50af 100644 --- a/libc/sysdeps/linux/arm/jmpbuf-offsets.h +++ b/libc/sysdeps/linux/arm/jmpbuf-offsets.h @@ -16,8 +16,4 @@ License along with the GNU C Library; if not, see <http://www.gnu.org/licenses/>. */ -#ifdef __UCLIBC_HAS_FPU__ -#define __JMP_BUF_SP 20 -#else #define __JMP_BUF_SP 8 -#endif hooks/post-receive -- uClibc-ng - small C library for embedded systems

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symbol lookup issue
by Julian Scheel 29 Feb '16

29 Feb '16

The attached buildroot defconfig allows to reproduce an error on lookup of symbols provided by a shared library when using uclibc-ng. The library used for reproducing in the provided configuration is libebml, but I also saw it with libmmal from the raspberry pi people. The config builds vlc with matroska plugin which links to libmatroska, which then links to libebml. In the generated rootfilesystem just run vlc listing it's plugins: # vlc --list vlc: symbol '_ZTIN7libebml10EbmlMasterE': can't resolve symbol [...snip...] This happens when the libmatroska plugin is loaded. Looking at the plugin with ldd: # ldd /usr/lib/vlc/plugins/demux/libmkv_plugin.so [...snip...] libmatroska.so.6 => /usr/lib/libmatroska.so.6 (0x00000000) libebml.so.4 => /usr/lib/libebml.so.4 (0x00000000) [...snap...] Looking in libebml.so.4 for the symbol using the buildroot toolchains readelf: [...]/target # ../host/usr/bin/x86_64-linux-readelf -Ws usr/lib/libebml.so.4 | grep _ZTIN7libebml10EbmlMasterE 520: 000000000021da20 24 OBJECT WEAK DEFAULT 19 _ZTIN7libebml10EbmlMasterE I used buildroot git from today to reproduce this, but was also able to reproduce with buildroot 2015.11. It happens on arm as well as x86_64 (and probably others). The attached default configuration is for x86_64, after building just untar the rootfs and chroot into it, then run vlc as described above. Using glibc instead of uclibc-ng makes the problem disappear. -Julian

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[PATCH 1/2] Replaced any occurence of /bin/sh with _PATH_BSHELL to allow easier portability on system with default shell on a different directory, like for instance on android.
by Ubaldo Porcheddu 26 Feb '16

26 Feb '16

Signed-off-by: Ubaldo Porcheddu <ubaldo(a)eja.it> --- libc/stdio/popen.c | 3 ++- libc/stdlib/system.c | 7 ++++--- libc/unistd/exec.c | 5 +++-- 3 files changed, 9 insertions(+), 6 deletions(-) diff --git a/libc/stdio/popen.c b/libc/stdio/popen.c index e1b1d40..1efbd3b 100644 --- a/libc/stdio/popen.c +++ b/libc/stdio/popen.c @@ -17,6 +17,7 @@ #include <stdio.h> #include <stdlib.h> +#include <paths.h> #include <errno.h> #include <unistd.h> #include <sys/wait.h> @@ -91,7 +92,7 @@ FILE *popen(const char *command, const char *modes) close(po->f->__filedes); } - execl("/bin/sh", "sh", "-c", command, (char *)0); + execl(_PATH_BSHELL, "sh", "-c", command, (char *)0); /* SUSv3 mandates an exit code of 127 for the child if the * command interpreter can not be invoked. */ diff --git a/libc/stdlib/system.c b/libc/stdlib/system.c index 8a6734d..771c30e 100644 --- a/libc/stdlib/system.c +++ b/libc/stdlib/system.c @@ -11,6 +11,7 @@ #include <unistd.h> #include <sys/wait.h> #include <stdlib.h> +#include <paths.h> #ifdef __UCLIBC_HAS_THREADS_NATIVE__ #include <sched.h> #include <errno.h> @@ -50,7 +51,7 @@ int __libc_system(const char *command) sigaction(SIGINT, &save_int, NULL); sigprocmask(SIG_SETMASK, &save_mask, NULL); - execl("/bin/sh", "sh", "-c", command, (char *) 0); + execl(_PATH_BSHELL, "sh", "-c", command, (char *) 0); _exit(127); } @@ -169,7 +170,7 @@ do_system (const char *line) { /* Child side. */ const char *new_argv[4]; - new_argv[0] = "/bin/sh"; + new_argv[0] = _PATH_BSHELL; new_argv[1] = "-c"; new_argv[2] = line; new_argv[3] = NULL; @@ -181,7 +182,7 @@ do_system (const char *line) INIT_LOCK (); /* Exec the shell. */ - (void) execve ("/bin/sh", (char *const *) new_argv, __environ); + (void) execve (_PATH_BSHELL, (char *const *) new_argv, __environ); _exit (127); } else if (pid < (pid_t) 0) diff --git a/libc/unistd/exec.c b/libc/unistd/exec.c index 8fa42e5..9be856d 100644 --- a/libc/unistd/exec.c +++ b/libc/unistd/exec.c @@ -20,6 +20,7 @@ #include <stdio.h> #include <stdlib.h> +#include <paths.h> #include <string.h> #include <errno.h> #include <stdarg.h> @@ -273,9 +274,9 @@ int execvpe(const char *path, char *const argv[], char *const envp[]) nargv[1] = (char *)path; memcpy(nargv+2, argv+1, n*sizeof(char *)); #if defined (L_execvp) - execve("/bin/sh", nargv, __environ); + execve(_PATH_BSHELL, nargv, __environ); #elif defined (L_execvpe) - execve("/bin/sh", nargv, envp); + execve(_PATH_BSHELL, nargv, envp); #endif EXEC_FREE(nargv, size2); } -- 1.9.1

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syslog message lost
by Arthur LAMBERT 26 Feb '16

26 Feb '16

Hi, I am using syslog from uclibc-ng (1.0.5) on an ARM board. I am working in a multi thread environment. I can see that some message are never saved in my syslog file.. Any problem to use syslog with thread ? or emmc ? In some piece of my current code, I can loose almost 70% of the messages. By adding a dirty call : system ("/bin/sync"); No more lost message in syslog. Is it a normal behavior ? Do I have a problem in my flash driver ? Is it a bug wyth syslog ? Thanks, Arthur.

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[PATCH 1/2] Advertise obstack only when chosen
by Anton Kolesov 24 Feb '16

24 Feb '16

This is similar to this patch for GNU glob: ff6ce3999db93a52d1cd22510f8508b660ddf54e. The problem is that libiberty/obstack.c file checks for _GNU_OBSTACK_INTERFACE_VERSION == _OBSTACK_INTERFACE_VERSION and elides libiberty obstack implementation if there is already a compatible implementation in libc. Therefore define should be set only when obstack is actually selected, otherwise it is not possible to build binutils and gdb with uClibc. Signed-off-by: Anton Kolesov <Anton.Kolesov(a)synopsys.com> Cc: Vineet Gupta <Vineet.Gupta1(a)synopsys.com> Cc: Alexey Brodkin <abrodkin(a)synopsys.com> --- include/gnu-versions.h | 2 ++ 1 file changed, 2 insertions(+) diff --git a/include/gnu-versions.h b/include/gnu-versions.h index 9f53778..6678c9b 100644 --- a/include/gnu-versions.h +++ b/include/gnu-versions.h @@ -43,7 +43,9 @@ remember, if any of these versions change, the libc.so major version number must change too (so avoid it)! */ +#ifdef __UCLIBC_HAS_OBSTACK__ #define _GNU_OBSTACK_INTERFACE_VERSION 1 /* vs malloc/obstack.c */ +#endif #define _GNU_REGEX_INTERFACE_VERSION 1 /* vs posix/regex.c */ #ifdef __UCLIBC_HAS_GNU_GLOB__ #define _GNU_GLOB_INTERFACE_VERSION 1 /* vs posix/glob.c */ -- 2.4.2

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[PATCH] xtensa: fix stack unwinding over __default_sa_restorer
by Max Filippov 24 Feb '16

24 Feb '16

For some xtensa cores generated code gets arranged so that __default_sa_restorer immediately follows preceding function. E.g.: 40a1b: c03340 sub a3, a3, a4 40a1e: f01d retw.n 00040a20 <__default_sa_restorer>: 40a20: e1a022 movi a2, 225 40a23: 005000 syscall ... Contents of the .eh_frame section: ... 000007f4 00000014 000007f8 FDE cie=00000000 pc=0004076c..00040a20 DW_CFA_advance_loc4: 3 to 0004076f DW_CFA_def_cfa_offset: 48 Due to the way xtensa libgcc uw_frame_state_for calls _Unwind_Find_FDE for non-signal frames, FDE for the previous function is found during thread cancellation signal stack unwinding in that case. Signal stack frame is not recognized and is not unwound properly, breaking cleanup routines calling for cancelled thread. Insert padding before the __default_sa_restorer so that no FDE is found for it, MD_FALLBACK_FRAME_STATE_FOR is called by uw_frame_state_for and the frame is correctly recognized as signal frame. Signed-off-by: Max Filippov <jcmvbkbc(a)gmail.com> --- libc/sysdeps/linux/xtensa/sigrestorer.S | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/libc/sysdeps/linux/xtensa/sigrestorer.S b/libc/sysdeps/linux/xtensa/sigrestorer.S index 474a893..697f54e 100644 --- a/libc/sysdeps/linux/xtensa/sigrestorer.S +++ b/libc/sysdeps/linux/xtensa/sigrestorer.S @@ -11,6 +11,12 @@ #endif .text + /* This space separates __default_sa_restorer from the previous + * function, so that its corresponding FDE is not mistakenly found + * by the libgcc stack unwinder. This is important for correct signal + * stack unwinding. + */ + .space 1 .align 4 .global __default_sa_restorer .type __default_sa_restorer, @function -- 2.1.4

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