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author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-11-06 09:38:09 -0300 |
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committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2021-11-22 14:49:11 -0300 |
commit | aac54dcd378209bbdddbcec749561b1d8f167d11 (patch) | |
tree | 5f3102ec38089693210ca3a9d6a7369a3fa54129 /sysdeps/mach/hurd/bits/unistd_ext.h | |
parent | bc801b3a40f3a9bc8f24f1d0fdc39413874c3172 (diff) | |
download | glibc-aac54dcd378209bbdddbcec749561b1d8f167d11.tar.gz glibc-aac54dcd378209bbdddbcec749561b1d8f167d11.tar.xz glibc-aac54dcd378209bbdddbcec749561b1d8f167d11.zip |
powerpc: Define USE_PPC64_NOTOC iff compiler supports it
The @notoc usage only yields an advantage on ISA 3.1+ machine (power10) and for ld.bfd also when it sees pcrel relocations used on the code (generated if compiler targets ISA 3.1+). On bfd case ISA 3.1+ instruction on stubs are used iff linker also sees the new pc-relative relocations (for instance R_PPC64_D34), otherwise it generates default stubs (ppc64_elf_check_relocs:4700). This patch also help on linkers that do not implement this optimization, since building for older ISA (such as 3.0 / power9) will also trigger power10 stubs generation in the assembly code uses the NOTOC imacro. Checked on powerpc64le-linux-gnu. Reviewed-by: Fangrui Song <maskray@google.com> Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Diffstat (limited to 'sysdeps/mach/hurd/bits/unistd_ext.h')
0 files changed, 0 insertions, 0 deletions