$ cat z.cc extern "C" void f() {} int main() { return 0; } $ cat z.syms { f; }; $ g++ z.cc -o z -Wl,--dynamic-list,z.syms -Wl,--gc-sections -ffunction-sections $ objdump -T z With Gold linker (today's trunk), f is not exported from the executable. With BFD linker, it is exported as a local(?) symbol.
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 "gdb and binutils". The branch, master has been updated via fd834e57ffce2f5dbe3443f034e68cebd63ee89a (commit) from ee1e2d4fb692736c754b42b69eb88c1f436c5f15 (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 ----------------------------------------------------------------- https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=fd834e57ffce2f5dbe3443f034e68cebd63ee89a commit fd834e57ffce2f5dbe3443f034e68cebd63ee89a Author: Cary Coutant <ccoutant@google.com> Date: Wed Feb 5 14:01:52 2014 -0800 Fix problems with the --dynamic-list option. PR gold/13577 complains that even though symbols listed in the --dynamic-list script are exported, they are still bound symbolically if -Bsymbolic is also used. There are two underlying problems here. First, -Bsymbolic should be overridden by --dynamic-list, since the dynamic list provides an explicit list of symbols that are not bound within the library, and if we go ahead and set DT_SYMBOLIC, then the dynamic loader will bind it within the library anyway. Second, gold did not properly identify the symbols listed in the file as preemptible. PR gold/16530 complains that symbols listed in the --dynamic-list script can still be garbage collected. I've fixed this by checking the symbols as they're added to the symbol table. (Unlike the --export-dynamic-symbol option, we can't iterate over the list, because the --dynamic-list script can have wildcards in it.) gold/ 2014-02-05 Cary Coutant <ccoutant@google.com> PR gold/13577 * options.cc (General_options::parse_dynamic_list): Set have_dynamic_list_. (General_options::General_options): Initialize have_dynamic_list_. (General_options::finalize): Turn off -Bsymbolic and -Bsymbolic-functions if --dynamic-list provided. * options.h (General_options::have_dynamic_list): New function. (General_options::have_dynamic_list_): New data member. * symtab.h (Symbol::is_preemptible): Handle --dynamic-list correctly. PR gold/16530 * symtab.cc (Symbol_table::add_from_relobj): If symbol is named in --dynamic-list, mark it. * testsuite/Makefile.am (gc_dynamic_list_test.sh): New test case. (dynamic_list_2): New test case. * testsuite/Makefile.in: Regenerate. * testsuite/dynamic_list_2.cc: New file. * testsuite/dynamic_list_2.t: New file. * testsuite/dynamic_list_lib1.cc: New file. * testsuite/dynamic_list_lib2.cc: New file. * testsuite/gc_dynamic_list_test.c: New file. * testsuite/gc_dynamic_list_test.sh: New file. * testsuite/gc_dynamic_list_test.t: New file. ----------------------------------------------------------------------- Summary of changes: gold/options.cc | 9 ++++++ gold/options.h | 7 ++++ gold/symtab.cc | 3 +- gold/symtab.h | 10 +++++- gold/testsuite/Makefile.am | 26 +++++++++++++++++ gold/testsuite/Makefile.in | 47 ++++++++++++++++++++++++++++-- gold/testsuite/dynamic_list_2.cc | 40 ++++++++++++++++++++++++++ gold/testsuite/dynamic_list_2.t | 27 +++++++++++++++++ gold/testsuite/dynamic_list_lib1.cc | 37 ++++++++++++++++++++++++ gold/testsuite/dynamic_list_lib2.cc | 49 ++++++++++++++++++++++++++++++++ gold/testsuite/gc_dynamic_list_test.c | 34 ++++++++++++++++++++++ gold/testsuite/gc_dynamic_list_test.sh | 39 +++++++++++++++++++++++++ gold/testsuite/gc_dynamic_list_test.t | 25 ++++++++++++++++ 13 files changed, 347 insertions(+), 6 deletions(-) create mode 100644 gold/testsuite/dynamic_list_2.cc create mode 100644 gold/testsuite/dynamic_list_2.t create mode 100644 gold/testsuite/dynamic_list_lib1.cc create mode 100644 gold/testsuite/dynamic_list_lib2.cc create mode 100644 gold/testsuite/gc_dynamic_list_test.c create mode 100755 gold/testsuite/gc_dynamic_list_test.sh create mode 100644 gold/testsuite/gc_dynamic_list_test.t
Fixed on trunk.
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 "gdb and binutils". The branch, master has been updated via d6f6f455778b10037503bcc39352b5174bba5e45 (commit) from 8577303939d47fc3dd433ed31f78ee47c6ad0aa8 (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 ----------------------------------------------------------------- https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=d6f6f455778b10037503bcc39352b5174bba5e45 commit d6f6f455778b10037503bcc39352b5174bba5e45 Author: H.J. Lu <hjl.tools@gmail.com> Date: Thu Feb 6 09:44:25 2014 -0800 Mark symbol in executables if it matches dynamic_list bfd/ PR gold/16530 * elflink.c (bfd_elf_gc_mark_dynamic_ref_symbol): Mark symbol in executables if it matches dynamic_list. ld/testsuite/ PR gold/16530 * ld-elf/dynamic-1.c: New file. * ld-elf/dynamic-1.rd: Likewise. * ld-elf/dynamic-1.syms: Likewise. * ld-elf/shared.exp (build_tests): Add dynamic-1. ----------------------------------------------------------------------- Summary of changes: bfd/ChangeLog | 6 ++++++ bfd/elflink.c | 6 +++++- ld/testsuite/ChangeLog | 9 +++++++++ ld/testsuite/ld-elf/dynamic-1.c | 10 ++++++++++ ld/testsuite/ld-elf/dynamic-1.rd | 5 +++++ ld/testsuite/ld-elf/dynamic-1.syms | 3 +++ ld/testsuite/ld-elf/shared.exp | 3 +++ 7 files changed, 41 insertions(+), 1 deletions(-) create mode 100644 ld/testsuite/ld-elf/dynamic-1.c create mode 100644 ld/testsuite/ld-elf/dynamic-1.rd create mode 100644 ld/testsuite/ld-elf/dynamic-1.syms
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 "gdb and binutils". The branch, binutils-2_24-branch has been updated via 6c8d8bfdad7a36b97efa887bb2e6ec69c2fb61a9 (commit) from 9da92c3812d5b5ddca09b4732939f1645d89bc59 (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 ----------------------------------------------------------------- https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=6c8d8bfdad7a36b97efa887bb2e6ec69c2fb61a9 commit 6c8d8bfdad7a36b97efa887bb2e6ec69c2fb61a9 Author: H.J. Lu <hjl.tools@gmail.com> Date: Thu Feb 6 09:44:25 2014 -0800 Mark symbol in executables if it matches dynamic_list bfd/ PR gold/16530 * elflink.c (bfd_elf_gc_mark_dynamic_ref_symbol): Mark symbol in executables if it matches dynamic_list. ld/testsuite/ PR gold/16530 * ld-elf/dynamic-1.c: New file. * ld-elf/dynamic-1.rd: Likewise. * ld-elf/dynamic-1.syms: Likewise. * ld-elf/shared.exp (build_tests): Add dynamic-1. ----------------------------------------------------------------------- Summary of changes: bfd/ChangeLog | 5 +++++ bfd/elflink.c | 6 +++++- ld/testsuite/ChangeLog | 10 ++++++++++ ld/testsuite/ld-elf/dynamic-1.c | 10 ++++++++++ ld/testsuite/ld-elf/dynamic-1.rd | 5 +++++ ld/testsuite/ld-elf/dynamic-1.syms | 3 +++ ld/testsuite/ld-elf/shared.exp | 3 +++ 7 files changed, 41 insertions(+), 1 deletions(-) create mode 100644 ld/testsuite/ld-elf/dynamic-1.c create mode 100644 ld/testsuite/ld-elf/dynamic-1.rd create mode 100644 ld/testsuite/ld-elf/dynamic-1.syms
The following commit was mistakenly marked for the PR 15530 instead of this one: - Log ----------------------------------------------------------------- https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=f17706ea1111ab537a33ad6f13a094f18c1acaea commit f17706ea1111ab537a33ad6f13a094f18c1acaea Author: Alan Modra <amodra@gmail.com> Date: Wed Feb 12 21:08:01 2014 +1030 PR15530, mark symbol in executables if it matches dynamic_list For powerpc64 as HJ did earlier for other ELF targets, and a tidy. PR gold/15530 * elf64-ppc.c (ppc64_elf_gc_mark_dynamic_ref): Support --export-dynamic and --dynamic-list marking of symbols. * elflink.c (bfd_elf_gc_mark_dynamic_ref_symbol): Reorder cheap tests first. ----------------------------------------------------------------------- Summary of changes: bfd/ChangeLog | 7 +++++++ bfd/elf64-ppc.c | 9 +++++++-- bfd/elflink.c | 11 ++++++----- 3 files changed, 20 insertions(+), 7 deletions(-)