Subject: =?utf-8?Q?Blipfoto=20=2D=20Introducing=20the=20all=2Dnew=20Bli

• Decode headers properly.
• Ensure all our input/output is in UTF-8.

• #713636: cpputest FTBFS due to -Werror. Dropped -Werror in Debian and submitted the patch upstream.
• #713527: logidee-tools FTBFS due to reorganizations in the TeXLive meta-packages. Fixed the (build-)dependencies.
• #713947: multiple security issues in WordPress. Packaged new upstream version 3.5.2 into unstable and wheezy-security (and Yves-Alexis Perez took care of squeeze-security).

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The cause was a user-mode write resulting in no page being found.

The cause was a user-mode read resulting in no page being found.

• Throughout the GNOME documentation and tools, "schema", "key" and "path" are used nearly interchangeably to mean roughly the same thing. (I think a path describes a key within a schema, to be precise.)
• schemas/keys/paths "must start with and end with a forward slash character", except when they mustn't, such as in override files, where you must use a dot, and you don't prefix or suffix the schema/key/path with dots. In fact the command line gsettings tool only accepts dotted schemas, not slash-separated ones.
• Sometimes, people choose XML, and save themselves the trouble of writing a custom parser, but at the expense of ease for humans having to read or write files. gsettings uses XML for schema files, but a separate ini-style format for override files. Everybody wins?
• glib-compile-schemas requires a path argument, so all your schema and override files must be in the same place. Sites have to lump stuff into /usr/share/glib-2.0/schemas alongside distribution files, rather than separated out to (say) /usr/local/share/glib-2.0/schemas.
• It's quite possible to get an override file past glib-compile-schemas which non-the-less is broken. The result is gsettings clients, including the gsettings binary itself, complaining and then segfaulting. Do not rely on glib-compile-schemas to ensure compliant override files.
• glib-compile-schemas would appear to read override files in native byte order, so make sure you name your override so that it sorts after any distribution-provided overrides. E.g., 20_my_gnome-shell.gschema.override to sort after 10_gnome-shell.gschema.override.

Version & changelog UPDATED: Guillem Jover told me how he met the same goals for libbsd :

1. Save the version from git into .dist-version and use this file if it exists. This allows one to rebuild ./configure from the published tarball without losing the version. This also handles Thorsten Glaser s critic.
2. Include CHANGELOG in DISTCLEANFILES variable.

Since this is a better solution, I have adopted the appropriate line of codes from libbsd. The two following sections are partly technically outdated.

Automated version In configure.ac, I was previously using a static version number that I had to increase when releasing:

AC_INIT([lldpd], [0.5.7], [bernat@luffy.cx])

Since the information is present in the git tree, this seems a bit redundant (and easy to forget). Taking the version from the git tree is easy:

AC_INIT([lldpd],
        [m4_esyscmd_s([git describe --tags --always --match [0-9]* 2> /dev/null   date +%F])],
        [bernat@luffy.cx])

If the head of the git tree is tagged, you get the exact tag (0.7.1 for example). If it is not, you get the nearest one, the number of commits since it and part of the current hash (0.7.1-29-g2909519 for example). The drawback of this approach is that if you rebuild configure from the released tarball, you don t have the git tree and the version will be a date. Just don t do that.

Automated changelog Generating the changelog from git is a common practice. I had some difficulties to make it right. Here is my attempt (I am using automake):

dist_doc_DATA = README.md NEWS ChangeLog
.PHONY: $(distdir)/ChangeLog
dist-hook: $(distdir)/ChangeLog
$(distdir)/ChangeLog:
        $(AM_V_GEN)if test -d $(top_srcdir)/.git; then \
          prev=$$(git describe --tags --always --match [0-9]* 2> /dev/null) ; \
          for tag in $$(git tag   grep -E '^[0-9]+(\.[0-9]+) 1, $$'   sort -rn); do \
            if [ x"$$prev" = x ]; then prev=$$tag ; fi ; \
            if [ x"$$prev" = x"$$tag" ]; then continue; fi ; \
            echo "$$prev [$$(git log $$prev -1 --pretty=format:'%ai')]:" ; \
            echo "" ; \
            git log --pretty=' - [%h] %s (%an)' $$tag..$$prev ; \
            echo "" ; \
            prev=$$tag ; \
          done > $@ ; \
        else \
          touch $@ ; \
        fi
ChangeLog:
        touch $@

Changelog entries are grouped by version. Since it is a bit verbose, I still maintain a NEWS file with important changes.

Core

C99 I have recently read 21st Century C which has some good bits and also handles the ecosystem around C. I have definitively adopted designated initializers in my coding style. Being a GCC extension since a long time, this is not a major compatibility problem. Without designated initializers:

struct netlink_req req;
struct iovec iov;
struct sockaddr_nl peer;
struct msghdr rtnl_msg;
memset(&req, 0, sizeof(req));
memset(&iov, 0, sizeof(iov));
memset(&peer, 0, sizeof(peer));
memset(&rtnl_msg, 0, sizeof(rtnl_msg));
req.hdr.nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg));
req.hdr.nlmsg_type = RTM_GETLINK;
req.hdr.nlmsg_flags = NLM_F_REQUEST   NLM_F_DUMP;
req.hdr.nlmsg_seq = 1;
req.hdr.nlmsg_pid = getpid();
req.gen.rtgen_family = AF_PACKET;
iov.iov_base = &req;
iov.iov_len = req.hdr.nlmsg_len;
peer.nl_family = AF_NETLINK;
rtnl_msg.msg_iov = &iov;
rtnl_msg.msg_iovlen = 1;
rtnl_msg.msg_name = &peer;
rtnl_msg.msg_namelen = sizeof(struct sockaddr_nl);

With designated initializers:

struct netlink_req req =  
    .hdr =  
        .nlmsg_len = NLMSG_LENGTH(sizeof(struct rtgenmsg)),
        .nlmsg_type = RTM_GETLINK,
        .nlmsg_flags = NLM_F_REQUEST   NLM_F_DUMP,
        .nlmsg_seq = 1,
        .nlmsg_pid = getpid()  ,
    .gen =   .rtgen_family = AF_PACKET  
 ;
struct iovec iov =  
    .iov_base = &req,
    .iov_len = req.hdr.nlmsg_len
 ;
struct sockaddr_nl peer =   .nl_family = AF_NETLINK  ;
struct msghdr rtnl_msg =  
    .msg_iov = &iov,
    .msg_iovlen = 1,
    .msg_name = &peer,
    .msg_namelen = sizeof(struct sockaddr_nl)
 ;

Logging Logging in lldpd was not extensive. Usually, when receiving a bug report, I asked the reporter to add some additional printf() calls to determine where the problem was. This was clearly suboptimal. Therefore, I have added many log_debug() calls with the ability to filter out some of them. For example, to debug interface discovery, one can run lldpd with lldpd -ddd -D interface. Moreover, I have added colors when logging to a terminal. This may seem pointless but it is now far easier to spot warning messages from debug ones.

libevent In lldpd 0.5.7, I was using my own select()-based event loop. It worked but I didn t want to grow a full-featured event loop inside lldpd. Therefore, I switched to libevent. The minimal required version of libevent is 2.0.5. A convenient way to check the changes in API is to use Upstream Tracker, a website tracking API and ABI changes for various libraries. This version of libevent is not available in many stable distributions. For example, Debian Squeeze or Ubuntu Lucid only have 1.4.13. I am also trying to keep compatibility with very old distributions, like RHEL 2, which does not have a packaged libevent at all. For some users, it may be a burden to compile additional libraries. Therefore, I have included libevent source code in lldpd source tree (as a git submodule) and I am only using it if no suitable system libevent is available. Have a look at m4/libevent.m4 and src/daemon/Makefile.am to see how this is done.

Client

Serialization lldpctl is a client querying lldpd to display discovered neighbors. The communication is done through an Unix socket. Each structure to be serialized over this socket should be described with a string. For example:

#define STRUCT_LLDPD_DOT3_MACPHY "(bbww)"
struct lldpd_dot3_macphy  
        u_int8_t                 autoneg_support;
        u_int8_t                 autoneg_enabled;
        u_int16_t                autoneg_advertised;
        u_int16_t                mau_type;
 ;

I did not want to use stuff like Protocol Buffers because I didn t want to copy the existing structures to other structures before serialization (and the other way after deserialization). However, the serializer in lldpd did not allow to handle reference to other structures, lists or circular references. I have written another one which works by annotating a structure with some macros:

struct lldpd_chassis  
    TAILQ_ENTRY(lldpd_chassis) c_entries;
    u_int16_t        c_index;
    u_int8_t         c_protocol;
    u_int8_t         c_id_subtype;
    char            *c_id;
    int              c_id_len;
    char            *c_name;
    char            *c_descr;
    u_int16_t        c_cap_available;
    u_int16_t        c_cap_enabled;
    u_int16_t        c_ttl;
    TAILQ_HEAD(, lldpd_mgmt) c_mgmt;
 ;
MARSHAL_BEGIN(lldpd_chassis)
MARSHAL_TQE  (lldpd_chassis, c_entries)
MARSHAL_FSTR (lldpd_chassis, c_id, c_id_len)
MARSHAL_STR  (lldpd_chassis, c_name)
MARSHAL_STR  (lldpd_chassis, c_descr)
MARSHAL_SUBTQ(lldpd_chassis, lldpd_mgmt, c_mgmt)
MARSHAL_END;

Only pointers need to be annotated. The remaining of the structure can be serialized with just memcpy()¹. I think there is still room for improvement. It should be possible to add annotations inside the structure and avoid some duplication. Or maybe, using a C parser? Or using the AST output from LLVM?

Library In lldpd 0.5.7, there are two possible entry points to interact with the daemon:

1. Through SNMP support. Only information available in LLDP-MIB are exported. Therefore, implementation-specific values are not available. Moreover, SNMP support is currently read-only.
2. Through lldpctl. Thanks to a contribution from Andreas Hofmeister, the output can be requested to be formatted as an XML document.

Integration of lldpd into a network stack was therefore limited to one of those two channels. As an exemple, you can have a look at how Vyatta made the integration using the second solution. To provide a more robust solution, I have added a shared library, liblldpctl, with a stable and well-defined API. lldpctl is now using it. I have followed those directions²:

• Consistent naming (all exported symbols are prefixed by lldpctl_). No pollution of the global namespace.
• Consistent return codes (on errors, all functions returning pointers are returning NULL, all functions returning integers are returning -1).
• Reentrant and thread-safe. No global variables.
• One well-documented include file.
• Reduce the use of boilerplate code. Don t segfault on NULL, accept integer input as string, provide easy iterators,
• Asynchronous API for input/output. The library delegates reading and writing by calling user-provided functions. Those functions can yield their effects. In this case, the user has to callback the library when data is available for reading or writing. It is therefore possible to integrate the library with any existing event-loop. A thin synchronous layer is provided on top of this API.
• Opaque types with accessor functions.

Accessing bits of information is done through atoms which are opaque containers of type lldpctl_atom_t. From an atom, you can extract some properties as integers, strings, buffers or other atoms. The list of ports is an atom. A port in this list is also an atom. The list of VLAN present on this port is an atom, as well as each VLAN in this list. The VLAN name is a NULL-terminated string living in the scope of an atom. Accessing a property is done by a handful of functions, like lldpctl_atom_get_str(), using a specific key. For example, here is how to display the list of VLAN assuming you have one port as an atom:

vlans = lldpctl_atom_get(port, lldpctl_k_port_vlans);
lldpctl_atom_foreach(vlans, vlan)  
    vid = lldpctl_atom_get_int(vlan,
                               lldpctl_k_vlan_id));
    name = lldpctl_atom_get_str(vlan,
                                lldpctl_k_vlan_name));
    if (vid && name)
        printf("VLAN %d: %s\n", vid, name);
 
lldpctl_atom_dec_ref(vlans);

Internally, an atom is typed and reference counted. The size of the API is greatly limited thanks to this concept. There are currently more than one hundred pieces of information that can be retrieved from lldpd. Ultimately, the library will also enable the full configuration of lldpd. Currently, many aspects can only be configured through command-line flags. The use of the library does not replace lldpctl which will still be available and be the primary client of the library.

CLI Having a configuration file was requested since a long time. I didn t want to include a parser in lldpd: I am trying to keep it small. It was already possible to configure lldpd through lldpctl. Locations, network policies and power policies were the three items that could be configured this way. So, the next step was to enable lldpctl to read a configuration file, parse it and send the result to lldpd. As a bonus, why not provide a full CLI accepting the same statements with inline help and completion?

Parsing & completion Because of completion, it is difficult to use a YACC generated parser. Instead, I define a tree where each node accepts a word. A node is defined with this function:

struct cmd_node *commands_new(
    struct cmd_node *,
    const char *,
    const char *,
    int(*validate)(struct cmd_env*, void *),
    int(*execute)(struct lldpctl_conn_t*, struct writer*,
        struct cmd_env*, void *),
    void *);

A node is defined by:

• its parent,
• an optional accepted static token,
• an help string,
• an optional validation function and
• an optional function to execute if the current token is accepted.

When walking the tree, we maintain an environment which is both a key-value store and a stack of positions in the tree. The validation function can check the environment to see if we are in the right context (we want to accept the keyword foo only once, for example). The execution function can add the current token as a value in the environment but it can also pop the current position in the tree to resume walk from a previous node. As an example, see how nodes for configuration of a coordinate-based location are registered:

/* Our root node */
struct cmd_node *configure_medloc_coord = commands_new(
    configure_medlocation,
    "coordinate", "MED location coordinate configuration",
    NULL, NULL, NULL);
/* The exit node.
   The validate function will check if we have both
   latitude and longitude. */
commands_new(configure_medloc_coord,
    NEWLINE, "Configure MED location coordinates",
    cmd_check_env, cmd_medlocation_coordinate,
    "latitude,longitude");
/* Store latitude. Once stored, we pop two positions
   to go back to the "root" node. The user can only
   enter latitude once. */
commands_new(
    commands_new(
        configure_medloc_coord,
        "latitude", "Specify latitude",
        cmd_check_no_env, NULL, "latitude"),
    NULL, "Latitude as xx.yyyyN or xx.yyyyS",
    NULL, cmd_store_env_value_and_pop2, "latitude");
/* Same thing for longitude */
commands_new(
    commands_new(
        configure_medloc_coord,
        "longitude", "Specify longitude",
        cmd_check_no_env, NULL, "longitude"),
    NULL, "Longitude as xx.yyyyE or xx.yyyyW",
    NULL, cmd_store_env_value_and_pop2, "longitude");

The definition of all commands is still a bit verbose but the system is simple enough yet powerful enough to cover all needed cases.

Readline When faced with a CLI, we usually expect some perks like completion, history handling and help. The most used library to provide such features is the GNU Readline Library. Because this is a GPL library, I have first searched an alternative. There are several of them:

• NetBSD Editline library (libedit).
• Autotool port of the NetBSD Editline library (also libedit).
• Debian version of the Editline library (libeditline).
• linenoise, a small and minimal readline library.
• Many others.

From an API point of view, the first three libraries support the GNU Readline API. They also have a common native API. Moreover, this native API also handles tokenization. Therefore, I have developed the first version of the CLI with this API³. Unfortunately, I noticed later this library is not very common in the Linux world and is not available in RHEL. Since I have used the native API, it was not possible to fallback to the GNU Readline library. So, let s switch! Thanks to the appropriate macro from the Autoconf Archive (with small modifications), the compilation and linking differences between the libraries are taken care of. Because GNU Readline library does not come with a tokenizer, I had to write one myself. The API is also badly documented and it is difficult to know which symbol is available in which version. I have limited myself to:

• readline(), addhistory(),
• rl_insert_text(),
• rl_forced_update_display(),
• rl_bind_key()
• rl_line_buffer and rl_point.

Unfortunately, the various libedit libraries have a noop for rl_bind_key(). Therefore, completion and online help is not available with them. I have noticed that most BSD come with GNU Readline library preinstalled, so it could be considered as a system library. Nonetheless, linking with libedit to avoid licensing issues is possible and help can be obtained by prefixing the command with help.

OS specific support

Netlink on Linux Previously, the list of interfaces was retrieved through getifaddrs(). lldpd is now using directly Netlink on Linux. This is not a big change since the GNU C Library already uses it to implement getifaddrs() and additional information, like VLAN, are still retrieved through ioctl() or sysfs. However, lldpd now gets notified when a change happens and update all interfaces in the next second. Like many other projects, I have written my own Netlink implementation instead of using libnl, a nice collection of libraries providing everything you need to query the kernel through Netlink, including some advanced bits. Why?

1. The latest version of libnl is still young and its availability in major distributions is scarce. It is not available in Debian Squeeze but will be available in Debian Wheezy. Like libevent, I could circumvent this problem by shipping the library with lldpd and use it when there is not system alternative. But
2. libnl is licensed under LGPL 2.1. This makes static linking difficult because the license is quite shaddy about static linking being derivative work or not. It is believed that it is authorized under the same provisions as in LGPL 3 which handles the case explicitely. This has been a problem with many projects. For example, OGRE has added an exception for static linking in version 1.6 and switched to MIT license in version 1.7.

I had a short discussion with Thomas Graf about this issue and he seems willing to add a similar exception. This may take some time, but once this is done, I will happily switch to libnl and retrieve more stuff from Netlink.

BSD support Until version 0.7, lldpd was Linux-only. The rewrite to use Netlink was the occasion to abstract interfaces and to port to other OS. The first port was for Debian GNU/kFreeBSD, then for FreeBSD, OpenBSD and NetBSD. They all share the same source code:

• getifaddrs() to get the list of interfaces,
• bpf(4) to attach to an interface to receive and send packets,
• PF_ROUTE socket to be notified when a change happens.

Each BSD has its own ioctl() to retrieve VLAN, bridging and bonding bits but they are quite similar. The code was usually adapted from ifconfig.c. The BSD ports have the same functionalities than the Linux port, except for NetBSD which lacks support for LLDP-MED inventory since I didn t find a simple way to retrieve DMI related information. They also offer greater security by filtering packets sent. Moreover, OpenBSD allows to lock the filters set on the socket:

/* Install write filter (optional) */
if (ioctl(fd, BIOCSETWF, (caddr_t)&fprog) < 0)  
    rc = errno;
    log_info("privsep", "unable to setup write BPF filter for %s",
        name);
    goto end;
 
/* Lock interface */
if (ioctl(fd, BIOCLOCK, (caddr_t)&enable) < 0)  
    rc = errno;
    log_info("privsep", "unable to lock BPF interface %s",
        name);
    goto end;
 

This is a very nice feature. lldpd is using a privileged process to open the raw socket. The socket is then transmitted to an unprivileged process. Without this feature, the unprivileged process can remove the BPF filters. I have ported the ability to lock a socket filter program to Linux. However, I still have to add a write filter.

OS X support Once FreeBSD was supported, supporting OS X seemed easy. I got sponsored by xcloud.me which provided a virtual Mac server. Making lldpd work with OS X took only two days, including a full hour to guess how to get Apple Xcode without providing a credit card. To help people installing lldpd on OS X, I have also written a lldpd formula for Homebrew which seems to be the most popular package manager for OS X.

Upstart and systemd support Many distributions propose upstart and systemd as a replacement or an alternative for the classic SysV init. Like most daemons, lldpd detaches itself from the terminal and run in the background, by forking twice, once it is ready (for lldpd, this just means we have setup the control socket). While both upstart and systemd can accommodate daemons that behave like this, it is recommended to not fork. How to advertise readiness in this case? With upstart, lldpd will send itself the SIGSTOP signal. upstart will detect this, resume lldpd with SIGCONT and assume it is ready. The code to support upstart is therefore quite simple. Instead of calling daemon(), do this:

const char *upstartjob = getenv("UPSTART_JOB");
if (!(upstartjob && !strcmp(upstartjob, "lldpd")))
    return 0;
log_debug("main", "running with upstart, don't fork but stop");
raise(SIGSTOP);

The job configuration file looks like this:

# lldpd - LLDP daemon
description "LLDP daemon"
start on net-device-up IFACE=lo
stop on runlevel [06]
expect stop
respawn
script
  . /etc/default/lldpd
  exec lldpd $DAEMON_ARGS
end script

systemd provides a socket to achieve the same goal. An application is expected to write READY=1 to the socket when it is ready. With the provided library, this is just a matter of calling sd_notify("READY=1\n"). Since sd_notify() has less than 30 lines of code, I have rewritten it to avoid an external dependency. The appropriate unit file is:

[Unit]
Description=LLDP daemon
Documentation=man:lldpd(8)
[Service]
Type=notify
NotifyAccess=main
EnvironmentFile=-/etc/default/lldpd
ExecStart=/usr/sbin/lldpd $DAEMON_ARGS
Restart=on-failure
[Install]
WantedBy=multi-user.target

OS include files Linux-specific include files were a major pain in previous versions of lldpd. The problems range from missing header files (like linux/if_bonding.h) to the use of kernel-only types. Those headers have a difficult history. They were first shipped with the C library but were rarely synced and almost always outdated. They were then extracted from kernel version with almost no change and lagged behind the kernel version used by the released distribution⁴. Today, the problem is acknowledged and is being solved by both the distributions which extract the headers from the packaged kernel and by kernel developers with a separation of kernel-only headers from user-space API headers. However, we still need to handle legacy. A good case is linux/ethtool.h:

• It can just be absent.
• It can use u8, u16 types which are kernel-only types. To work around this issue, type munging can be setup.
• It can miss some definition, like SPEED_10000. In this case, you either define the missing bits and find yourself with a long copy of the original header interleaved with #ifdef or conditionally use each symbol. The latest solution is a burden by itself but it also hinders some functionalities that can be available in the running kernel.

The easy solution to all this mess is to just include the appropriate kernel headers into the source tree of the project. Thanks to Google ripping them for its Bionic C library, we know that copying kernel headers into a program does not create a derivative work.

---

1. Therefore, the use of u_int16_t and u_int8_t types is a left-over of the previous serializer where the size of all members was important.
2. For more comprehensive guidelines, be sure to check Writing a C library.
3. Tokenization is not the only advantage of libedit native API. The API is also cleaner, does not have a global state and has a better documentation. All the implementations are also BSD licensed.
4. For example, in Debian Sarge, the Linux kernel was a 2.6.8 (2004) while the kernel headers were extracted from some pre-2.6 kernel.

 $ readelf --segments /usr/lib/x86_64-linux-gnu/libcrypto.so.1.0.0
Elf file type is DYN (Shared object file)
Entry point 0x77c00
There are 7 program headers, starting at offset 64
Program Headers:
  Type           Offset             VirtAddr           PhysAddr
                 FileSiz            MemSiz              Flags  Align
  LOAD           0x0000000000000000 0x0000000000000000 0x0000000000000000
                 0x00000000001b5ea4 0x00000000001b5ea4  R E    200000
  LOAD           0x00000000001b6b60 0x00000000003b6b60 0x00000000003b6b60
                 0x0000000000028dc4 0x000000000002c998  RW     200000

int function(void)  
      return 100;
 

$ gcc -fPIC -shared -o libfoo.so foo.c
$ ./libfoo.so
Segmentation fault

$ readelf --segments ./libfoo.so
Elf file type is DYN (Shared object file)
Entry point 0x570
There are 6 program headers, starting at offset 64
Program Headers:
  Type           Offset             VirtAddr           PhysAddr
                 FileSiz            MemSiz              Flags  Align
  LOAD           0x0000000000000000 0x0000000000000000 0x0000000000000000
                 0x000000000000070c 0x000000000000070c  R E    200000
  LOAD           0x0000000000000710 0x0000000000200710 0x0000000000200710
                 0x0000000000000238 0x0000000000000240  RW     200000

This member gives the virtual address to which the system first transfers control, thus starting the process. If the file has no associated entry point, this member holds zero.

• the -e entry command-line option;
• the ENTRY(symbol) command in a linker script;
• the value of a target specific symbol
• the address of the first byte of the .text section, if present;
• The address 0.

$ ld --verbose   grep ENTRY
ENTRY(_start)

$ nm /usr/lib/x86_64-linux-gnu/crt1.o
crt1.o:
0000000000000000 R _IO_stdin_used
0000000000000000 D __data_start
                 U __libc_csu_fini
                 U __libc_csu_init
                 U __libc_start_main
0000000000000000 T _start
0000000000000000 W data_start
                 U main

$ gcc -dumpspecs
...
*startfile:
% !shared: % pg p profile:gcrt1.o%s;pie:Scrt1.o%s;:crt1.o%s 
 crti.o%s % static:crtbeginT.o%s;shared pie:crtbeginS.o%s;:crtbegin.o%s 

$ gcc -v -fPIC -shared -o libfoo.so foo.c
Using built-in specs.
 ...
/usr/lib/gcc/x86_64-linux-gnu/4.4.5/collect2 -shared -o libfoo.so
/usr/lib/gcc/x86_64-linux-gnu/4.4.5/../../../../lib/crti.o
/usr/lib/gcc/x86_64-linux-gnu/4.4.5/crtbeginS.o
/tmp/ccRpsQU3.o
/usr/lib/gcc/x86_64-linux-gnu/4.4.5/crtendS.o
/usr/lib/gcc/x86_64-linux-gnu/4.4.5/../../../../lib/crtn.o

libfoo.so[8682]: segfault at 1 ip 0000000000000001 sp 00007fffcd63ec48 error 14 in libfoo.so[7f54c51fa000+1000]

00000000000004a0 <call_gmon_start>:
 4a0:   48 83 ec 08             sub    $0x8,%rsp
 4a4:   48 8b 05 2d 03 20 00    mov    0x20032d(%rip),%rax        # 2007d8 <_DYNAMIC+0x190>
 4ab:   48 85 c0                test   %rax,%rax
 4ae:   74 02                   je     4b2 <call_gmon_start+0x12>
 4b0:   ff d0                   callq  *%rax
 4b2:   48 83 c4 08             add    $0x8,%rsp
 4b6:   c3                      retq

$ readelf --relocs ./libfoo.so
Relocation section '.rela.dyn' at offset 0x3f0 contains 4 entries:
  Offset          Info           Type           Sym. Value    Sym. Name + Addend
000000200810  000000000008 R_X86_64_RELATIVE                    0000000000200810
0000002007d8  000200000006 R_X86_64_GLOB_DAT 0000000000000000 __gmon_start__ + 0
0000002007e0  000300000006 R_X86_64_GLOB_DAT 0000000000000000 _Jv_RegisterClasses + 0
0000002007e8  000400000006 R_X86_64_GLOB_DAT 0000000000000000 __cxa_finalize + 0
Relocation section '.rela.plt' at offset 0x450 contains 1 entries:
  Offset          Info           Type           Sym. Value    Sym. Name + Addend
000000200808  000400000007 R_X86_64_JUMP_SLO 0000000000000000 __cxa_finalize + 0

(gdb) x/2g $rsp
0x7fffffffe7d8:        0x0000000000000000      0x0000000000000001

$ /lib/x86_64-linux-gnu/libc-2.13.so
GNU C Library (Debian EGLIBC 2.13-37) stable release version 2.13, by Roland McGrath et al.
Copyright (C) 2011 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
...

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Version: GnuPG v1.4.12 (GNU/Linux)
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89 02 1C -- packet type 2 (signature) length 540
        04 00 -- version 4 sigclass 0
        01 -- pubkey 1 (RSA)
        02 -- digest 2 (SHA1)
        00 06 -- hashed data of 6 bytes
                05 02 -- subpacket type 2 (signature creation time) length 4
                        50 F2 AC 50 -- created 1358081104 (2013-01-13 12:45:04)
        00 0A -- unhashed data of 10 bytes
                09 10 -- subpacket type 16 (issuer key ID) length 8
                        7F 11 72 03 23 FB 02 DC -- issuer 7F11720323FB02DC
        D5 0C -- digeststart 213,12
        0F FA -- integer with 4090 bits
                02 D0 [....]

• [1] http://etbe.coker.com.au/2012/09/22/phone-prices-australia/
• [2] http://www.virginmobile.com.au/sim-card/
• [3] https://www.optus.com.au/shop/mobilephone/byomobile/simcardplans
• [4] http://www.internode.on.net/residential/phone_and_voip/nodemobile/
• [5] http://www.tpg.com.au/mobile/plans.php

1. Is Lebara the Cheapest Mobile Phone company in Australia? My parents have just got a mobile phone with a...
2. Choosing an Australian Mobile Telco for use with Android Since playing with the IBM Seer augmented reality software [1]...
3. Changing Phone Prices in Australia 18 months ago when I signed up with Virgin Mobile...

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• #639565 liboauth-dev: "liboauth-dev: please make loose libcurl dependency"
  send a patch to the BTS
• #642165 src:libmime-lite-html-perl: "libmime-lite-html-perl: FTBFS: test failures"
  update test reference files, upload to DELAYED/2
• #656505 taxbird: "taxbird: build-dependency on libgeier-dev needs to be versioned"
  propose a different patch in the BTS
• #662606 php-horde-core: "php-horde-core: FTBFS: "This package contains role "horde" and requires package "horde/Role" to be used""
  add missing build dependency, upload to DELAYED/2
• #664724 rrdcached: "rrdcached: fails to install, postinst, invoke-rc.d rrdcached start, start-stop-daemon, segfault"
  (re-)create directories needed by daemon in init script, upload to DELAYED/2
• #665018 src:python-fixtures: "python-fixtures: FTBFS: AttributeError: 'BrokenFixture' object has no attribute 'items'"
  add patch from Emanuele Aina, upload to DELAYED/2
• #666231 src:byzanz: "byzanz: FTBFS with gtk 3.4"
  sponsor NMU from Etienne Millon, upload to DELAYED/2
• #678108 httpcomponents-core: "httpcomponents-core: FTBFS twice in a row - broken clean rule"
  call mh_clean as suggested by Niels Thykier, upload to DELAYED/2
• #678859 libmozjs185-dev: "libmozjs185-dev depends on libffi-dev"
  add missing dependency as proposed by Nicolas Boulenguez, upload to DELAYED/2
• #679669 src:underscore: "underscore: build-dependency on uglifyjs not satisfiable in wheezy"
  propose a patch in the BTS, maintainer prefers alternative ways of fixing it
• #680423 trac-wikiprint: "trac-wikiprint: depends on nonexisting python-pil if rebuilt"
  propose a patch in the BTS
• #680424 trac-odtexport: "trac-odtexport: depends on nonexisting python-pil if rebuilt"
  propose a patch in the BTS, then fixed & closed by maintainer
• #681146 bitlbee-common: "bitlbee-common: fails to install, purge, and install again"
  propose a patch in the BTS, then upload to DELAYED/2 with maintainer's permission
• #681567 opennebula-common: "opennebula-common: fails to install, purge, and install again"
  propose a patch in the BTS, then upload to DELAYED/2 with maintainer's permission

1. randrproto. git://anongit.freedesktop.org/git/xorg/proto/randrproto master

1. libdrm. git://people.freedesktop.org/~airlied/drm.git prime
2. libXrandr. git://people.freedesktop.org/~airlied/libXrandr.git prime
3. xrandr. git://people.freedesktop.org/~airlied/xrandr.git prime
4. xf86-video-intel. git://people.freedesktop.org/~airlied/xf86-video-intel prime

1. xf86-video-modesetting. git://people.freedesktop.org/~keithp/xf86-video-modesetting prime
2. kernel. git://people.freedesktop.org/~keithp/linux prime
3. X server. git://people.freedesktop.org/~keithp/xserver master

[drm:udl_parse_vendor_descriptor] *ERROR* Unrecognized vendor firmware descriptor".