On 7/12/21 9:23 PM, Ilya Leoshkevich wrote: > Bootstrapped and regtested on s390x-redhat-linux. Ok for master? > > v1: https://gcc.gnu.org/pipermail/gcc-patches/2021-June/573614.html > v1 -> v2: Do not use UNSPEC_PLT in 64-bit code and rename it to > UNSPEC_PLT31 (Ulrich, Andreas). Do not append @PLT only to > weak symbols in non-PIC code (Ulrich). Add TLS tests. > > v2: https://gcc.gnu.org/pipermail/gcc-patches/2021-July/574646.html > v2 -> v3: Use %K in function_profiler() and s390_output_mi_thunk(), > add tests for these cases. > > > > This helps with generating code for kernel hotpatches, which contain > individual functions and are loaded more than 2G away from vmlinux. > This should not create performance regressions for the normal use > cases, because for local functions ld replaces @PLT calls with direct > calls. > > gcc/ChangeLog: > > * config/s390/predicates.md (bras_sym_operand): Accept all > functions in 64-bit mode, use UNSPEC_PLT31. > (larl_operand): Use UNSPEC_PLT31. > * config/s390/s390.c (s390_loadrelative_operand_p): Likewise. > (legitimize_pic_address): Likewise. > (s390_emit_tls_call_insn): Mark __tls_get_offset as function, > use UNSPEC_PLT31. > (s390_delegitimize_address): Use UNSPEC_PLT31. > (s390_output_addr_const_extra): Likewise. > (print_operand): Add @PLT to TLS calls, handle %K. > (s390_function_profiler): Mark __fentry__/_mcount as function, > use %K, use UNSPEC_PLT31. > (s390_output_mi_thunk): Use only UNSPEC_GOT, use %K. > (s390_emit_call): Use UNSPEC_PLT31. > (s390_emit_tpf_eh_return): Mark __tpf_eh_return as function. > * config/s390/s390.md (UNSPEC_PLT31): Rename from UNSPEC_PLT. > (*movdi_64): Use %K. > (reload_base_64): Likewise. > (*sibcall_brc): Likewise. > (*sibcall_brcl): Likewise. > (*sibcall_value_brc): Likewise. > (*sibcall_value_brcl): Likewise. > (*bras): Likewise. > (*brasl): Likewise. > (*bras_r): Likewise. > (*brasl_r): Likewise. > (*bras_tls): Likewise. > (*brasl_tls): Likewise. > (main_base_64): Likewise. > (reload_base_64): Likewise. > (@split_stack_call<mode>): Likewise.
Ok. Thanks! Andreas
