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| author | H.J. Lu <hjl.tools@gmail.com> | 2018-08-10 12:21:58 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2018-08-10 12:22:09 -0700 |
| commit | 48e30f5238c70e738f44474d595c476ef4e4ec38 (patch) | |
| tree | ba038036a537b979b8b9844be9530e63cbde36a9 /bfd | |
| parent | ad3a68e9b9b01fbdc09854fb7fd655db652c482f (diff) | |
| download | gdb-48e30f5238c70e738f44474d595c476ef4e4ec38.zip gdb-48e30f5238c70e738f44474d595c476ef4e4ec38.tar.gz gdb-48e30f5238c70e738f44474d595c476ef4e4ec38.tar.bz2 | |
Always clear h->verinfo.verdef when overriding a dynamic definition
When linker defines a symbol to override a dynamic definition, it should
always clear h->verinfo.verdef so that the symbol won't be associated
with the version information from the dynamic object. This happened to
the symbol "_edata" when creating an unversioned dynamic object linking
against:
1. libKF5ConfigCore.so.5.49.0
2. libKF5CoreAddons.so.5.49.0
3. libKF5I18n.so.5.49.0
4. libKF5DBusAddons.so.5.49.0
5. libQt5Xml.so.5.11.1
6. libQt5DBus.so.5.11.1
7. libQt5Core.so.5.11.1
Among them
libQt5Xml.so.5.11.1
299: 000000000003e000 0 NOTYPE GLOBAL DEFAULT 18 _edata@@Qt_5
libQt5DBus.so.5.11.1
597: 0000000000092018 0 NOTYPE GLOBAL DEFAULT 18 _edata@@Qt_5
libQt5Core.so.5.11.1
2292: 00000000004df640 0 NOTYPE GLOBAL DEFAULT 21 _edata@Qt_5
2293: 00000000004df640 0 NOTYPE GLOBAL DEFAULT 21 _edata@Qt_5
The problem is triggered by 2 duplicated entries of _edata@Qt_5 in
libQt5Core.so.5.11.1 which was created by gold. Before this commit,
ld created the dynamic object with "_edata" in its dynamic symbol table
which was linker defined and associated with the version information
from libQt5Core.so.5.11.1. The code in question was there when the
binutils source was imported to sourceware.org. When such a dynamic
object was used later, we got:
/usr/bin/ld: bin/libKF5Service.so.5.49.0: _edata: invalid version 21 (max 0)
/usr/bin/ld: bin/libKF5Service.so.5.49.0: error adding symbols: bad value
Tested with many ELF targets.
PR ld/23499
* elflink.c (bfd_elf_record_link_assignment): Always clear
h->verinfo.verdef when overriding a dynamic definition.
Diffstat (limited to 'bfd')
| -rw-r--r-- | bfd/ChangeLog | 6 | ||||
| -rw-r--r-- | bfd/elflink.c | 12 |
2 files changed, 11 insertions, 7 deletions
diff --git a/bfd/ChangeLog b/bfd/ChangeLog index 20aa4f3..a62a854 100644 --- a/bfd/ChangeLog +++ b/bfd/ChangeLog @@ -1,5 +1,11 @@ 2018-08-10 H.J. Lu <hongjiu.lu@intel.com> + PR ld/23499 + * elflink.c (bfd_elf_record_link_assignment): Always clear + h->verinfo.verdef when overriding a dynamic definition. + +2018-08-10 H.J. Lu <hongjiu.lu@intel.com> + PR binutils/23494 * elf-properties.c (elf_get_gnu_property_section_size): Always use align_size as pr_datasz for GNU_PROPERTY_STACK_SIZE. diff --git a/bfd/elflink.c b/bfd/elflink.c index b24fb95..02618be 100644 --- a/bfd/elflink.c +++ b/bfd/elflink.c @@ -686,13 +686,11 @@ bfd_elf_record_link_assignment (bfd *output_bfd, && !h->def_regular) h->root.type = bfd_link_hash_undefined; - /* If this symbol is not being provided by the linker script, and it is - currently defined by a dynamic object, but not by a regular object, - then clear out any version information because the symbol will not be - associated with the dynamic object any more. */ - if (!provide - && h->def_dynamic - && !h->def_regular) + /* If this symbol is currently defined by a dynamic object, but not + by a regular object, then clear out any version information because + the symbol will not be associated with the dynamic object any + more. */ + if (h->def_dynamic && !h->def_regular) h->verinfo.verdef = NULL; /* Make sure this symbol is not garbage collected. */ |