forked from Imagelibrary/binutils-gdb
32f5984419
Calls from notoc functions via the PLT need different stubs. Even calls to local functions requiring a valid toc pointer must go via a stub. This patch provides the support in gold. elfcpp/ * powerpc.h (R_PPC64_PLTSEQ_NOTOC, R_PPC64_PLTCALL_NOTOC): Define. gold/ * powerpc.cc (Target_powerpc::maybe_skip_tls_get_addr_call): Handle notoc calls. (is_branch_reloc): Template on size. Return true for REL24_NOTOC. Update all callers. (max_branch_delta): Likewise. (Target_powerpc::Branch_info::make_stub): Add a stub for notoc calls to functions needing a valid toc pointer. (Target_powerpc::do_relax): Layout stubs again if any need resize. (add_12_11_12, addi_12_11, addis_12_11, ldx_12_11_12, ori_12_12_0), (oris_12_12_0, sldi_12_12_32): Define. (Stub_table::Plt_stub_ent): Add notoc_ and iter_ fields. (Stub_table::Branch_stub_key, Branch_stub_key_hash): Rename from Branch_stub_ent and Branch_stub_ent hash. Remove save_res_ from key. (Stub_table::Branch_stub_ent): New struct. (class Stub_table): Add need_resize and resizing vars. (Stub_table::need_resize, branch_size): New accessors. (Stub_table::set_resizing): New function. (Stub_table::add_plt_call_entry): Handle notoc calls and resizing on seeing such or a tocsave stubs after a normal stub using the same sym. (Stub_table::add_long_branch_entry): Similarly. (Stub_table::find_long_branch_entry): Return a Branch_stub_ent*. (Stub_table::define_stub_syms): Adjust (Stub_table::build_tls_opt_head, build_tls_opt_tail): New functions. (build_notoc_offset): New function. (Stub_table::plt_call_size): Move out of line. Handle notoc calls. (Stub_table::branch_stub_size): Similarly. (Stub_table::do_write): Separate loop for ELFv2 stubs, handling notoc calls. Simplify ELFv1 loop. Output notoc branch stubs. Use build_tls_opt_head and build_tls_opt_tail. (Target_powerpc::Scan::get_reference_flags): Handle REL24_NOTOC. (Target_powerpc::Scan::reloc_needs_plt_for_ifunc): Likewise, and PLTSEQ_NOTOC and PLTCALL_NOTOC. (Target_powerpc::Scan::local, global, relocate): Likewise.
README for GNU development tools This directory contains various GNU compilers, assemblers, linkers, debuggers, etc., plus their support routines, definitions, and documentation. If you are receiving this as part of a GDB release, see the file gdb/README. If with a binutils release, see binutils/README; if with a libg++ release, see libg++/README, etc. That'll give you info about this package -- supported targets, how to use it, how to report bugs, etc. It is now possible to automatically configure and build a variety of tools with one command. To build all of the tools contained herein, run the ``configure'' script here, e.g.: ./configure make To install them (by default in /usr/local/bin, /usr/local/lib, etc), then do: make install (If the configure script can't determine your type of computer, give it the name as an argument, for instance ``./configure sun4''. You can use the script ``config.sub'' to test whether a name is recognized; if it is, config.sub translates it to a triplet specifying CPU, vendor, and OS.) If you have more than one compiler on your system, it is often best to explicitly set CC in the environment before running configure, and to also set CC when running make. For example (assuming sh/bash/ksh): CC=gcc ./configure make A similar example using csh: setenv CC gcc ./configure make Much of the code and documentation enclosed is copyright by the Free Software Foundation, Inc. See the file COPYING or COPYING.LIB in the various directories, for a description of the GNU General Public License terms under which you can copy the files. REPORTING BUGS: Again, see gdb/README, binutils/README, etc., for info on where and how to report problems.