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| author | Alan Modra <amodra@gmail.com> | 2017-06-23 20:37:34 +0930 |
|---|---|---|
| committer | Alan Modra <amodra@gmail.com> | 2017-06-23 20:37:34 +0930 |
| commit | 7e57d19e48f94ff9a19a9413cf25d1887e3a7f52 (patch) | |
| tree | af0f7843a53e5a1458a73e358666df04257f316f /gold/ChangeLog | |
| parent | 0e158763b0c5671cd40cdd2faee48d6659489ddd (diff) | |
| download | gdb-7e57d19e48f94ff9a19a9413cf25d1887e3a7f52.zip gdb-7e57d19e48f94ff9a19a9413cf25d1887e3a7f52.tar.gz gdb-7e57d19e48f94ff9a19a9413cf25d1887e3a7f52.tar.bz2 | |
[GOLD] PowerPC64 tocsave
This adds support to gold for the tocsave relocs already supported by
ld.bfd. R_PPC64_TOCSAVE relocs are part of a scheme to move r2 saves
to the prologue of a function rather than in each plt call stub. We
don't want a compiler to always emit the r2 save, as this would be
wasted if the calls turned out to be local. See the tocsave*.s in
ld/testsuite/ld-powerpc/.
* powerpc.cc (Target_powerpc::tocsave_loc_): New var.
(Target_powerpc::mark_pltcall, add_tocsave, tocsave_loc): New functions.
(Target_powerpc::Branch_info::tocsave_): New var.
(Target_powerpc::Branch_info::mark_pltcall): New function.
(Target_powerpc::Branch_info::make_stub): Pass tocsave_ to
add_plt_call_entry.
(Stub_table::Plt_stub_ent): Make public. Add r2save_.
(Stub_table::add_plt_call_entry): Add bool tocsave_ param. Set
r2save_.
(Stub_table::find_plt_call_entry): Return Plt_stub_ent*. Adjust
use throughout.
(Stub_table::do_write): Conditionally output r2 save in plt stubs.
(Target_powerpc::Scan::local): Handle R_PPC64_TOCSAVE.
(Target_powerpc::Scan::global): Likewise.
(Target_powerpc::Relocate::relocate): Skip r2 save in plt call stub
with tocsave reloc. Replace header tocsave nop with r2 save.
* symtab.h (struct Symbol_location_hash): Make public.
Diffstat (limited to 'gold/ChangeLog')
| -rw-r--r-- | gold/ChangeLog | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/gold/ChangeLog b/gold/ChangeLog index c6ebaa6..0428b03 100644 --- a/gold/ChangeLog +++ b/gold/ChangeLog @@ -1,3 +1,23 @@ +2017-06-23 Alan Modra <amodra@gmail.com> + + * powerpc.cc (Target_powerpc::tocsave_loc_): New var. + (Target_powerpc::mark_pltcall, add_tocsave, tocsave_loc): New functions. + (Target_powerpc::Branch_info::tocsave_): New var. + (Target_powerpc::Branch_info::mark_pltcall): New function. + (Target_powerpc::Branch_info::make_stub): Pass tocsave_ to + add_plt_call_entry. + (Stub_table::Plt_stub_ent): Make public. Add r2save_. + (Stub_table::add_plt_call_entry): Add bool tocsave_ param. Set + r2save_. + (Stub_table::find_plt_call_entry): Return Plt_stub_ent*. Adjust + use throughout. + (Stub_table::do_write): Conditionally output r2 save in plt stubs. + (Target_powerpc::Scan::local): Handle R_PPC64_TOCSAVE. + (Target_powerpc::Scan::global): Likewise. + (Target_powerpc::Relocate::relocate): Skip r2 save in plt call stub + with tocsave reloc. Replace header tocsave nop with r2 save. + * symtab.h (struct Symbol_location_hash): Make public. + 2017-06-21 Alan Modra <amodra@gmail.com> * powerpc.cc (Plt_stub_key): Rename from Plt_stub_ent. Remove indx_. |