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| author | James Clarke <jrtc27@jrtc27.com> | 2016-08-10 09:58:01 -0700 |
|---|---|---|
| committer | Cary Coutant <ccoutant@gmail.com> | 2016-08-10 09:58:01 -0700 |
| commit | 2c00092dced3808ce4dcb76a9e7c473530dd01e8 (patch) | |
| tree | 22d6fb414fd849543da67da3ec3fa041d5452281 | |
| parent | 007801eeb19ed565eb4dc4020831f6d293f46930 (diff) | |
| download | gdb-2c00092dced3808ce4dcb76a9e7c473530dd01e8.zip gdb-2c00092dced3808ce4dcb76a9e7c473530dd01e8.tar.gz gdb-2c00092dced3808ce4dcb76a9e7c473530dd01e8.tar.bz2 | |
Fix potential crashes when Target::make_symbol() returns NULL.
2016-08-10 James Clarke <jrtc27@jrtc27.com>
gold/
PR gold/20443
* symtab.cc (Symbol_table::add_from_relobj): Handle NULL symbols,
which will be present for STT_SPARC_REGISTER.
(Symbol_table::add_from_pluginobj): Likewise.
(Symbol_table::add_from_dynobj): Likewise.
(Symbol_table::add_from_incrobj): Removed dead code.
| -rw-r--r-- | gold/ChangeLog | 9 | ||||
| -rw-r--r-- | gold/symtab.cc | 13 |
2 files changed, 18 insertions, 4 deletions
diff --git a/gold/ChangeLog b/gold/ChangeLog index d0a670b..10677c7 100644 --- a/gold/ChangeLog +++ b/gold/ChangeLog @@ -1,5 +1,14 @@ 2016-08-10 James Clarke <jrtc27@jrtc27.com> + PR gold/20443 + * symtab.cc (Symbol_table::add_from_relobj): Handle NULL symbols, + which will be present for STT_SPARC_REGISTER. + (Symbol_table::add_from_pluginobj): Likewise. + (Symbol_table::add_from_dynobj): Likewise. + (Symbol_table::add_from_incrobj): Removed dead code. + +2016-08-10 James Clarke <jrtc27@jrtc27.com> + PR gold/20442 * sparc.cc (Target_sparc::Relocate::relocate): R_SPARC_GOTDATA_OP_LOX10 should fall back on R_SPARC_GOT10, not R_SPARC_GOT13. diff --git a/gold/symtab.cc b/gold/symtab.cc index 5ce5c31..b31794a 100644 --- a/gold/symtab.cc +++ b/gold/symtab.cc @@ -1325,6 +1325,9 @@ Symbol_table::add_from_relobj( res = this->add_from_object(relobj, name, name_key, ver, ver_key, is_default_version, *psym, st_shndx, is_ordinary, orig_st_shndx); + + if (res == NULL) + continue; if (is_forced_local) this->force_local(res); @@ -1406,6 +1409,9 @@ Symbol_table::add_from_pluginobj( is_default_version, *sym, st_shndx, is_ordinary, st_shndx); + if (res == NULL) + return NULL; + if (is_forced_local) this->force_local(res); @@ -1602,6 +1608,9 @@ Symbol_table::add_from_dynobj( } } + if (res == NULL) + continue; + // Note that it is possible that RES was overridden by an // earlier object, in which case it can't be aliased here. if (st_shndx != elfcpp::SHN_UNDEF @@ -1640,7 +1649,6 @@ Symbol_table::add_from_incrobj( Stringpool::Key ver_key = 0; bool is_default_version = false; - bool is_forced_local = false; Stringpool::Key name_key; name = this->namepool_.add(name, true, &name_key); @@ -1650,9 +1658,6 @@ Symbol_table::add_from_incrobj( is_default_version, *sym, st_shndx, is_ordinary, st_shndx); - if (is_forced_local) - this->force_local(res); - return res; } |