[Bug gas/26513] 629310abec8811510177101f3c7992dfd4be24dd breaks assembling PowerPC Linux kernels

[cvs-commit at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26513

--- Comment #2 from cvs-commit at gcc dot gnu.org <cvs-commit at gcc dot 
gnu.org> ---
The master branch has been updated by Alan Modra <amodra@sourceware.org>:

https://sourceware.org/git/gitweb.cgi?p=binutils-gdb.git;h=fe0e921f00237abd926cd9efaeedf758b17170de

commit fe0e921f00237abd926cd9efaeedf758b17170de
Author: Alan Modra <amodra@gmail.com>
Date:   Sat Aug 22 17:59:57 2020 +0930

    PR26513, 629310abec breaks assembling PowerPC Linux kernels

    Inserting with replacement is wrong for some gas hash table uses.
    This patch implements an htab_insert that conditionally replaces, and
    similarly for str_hash_insert.  str_hash_insert with replace=0 is
    roughly equivalent to the older hash_insert, and str_hash_insert with
    replace=1 to the older hash_jam, but return values are different.  I
    found it useful to know whether the slot was occupied prior to
    inserting/replacing.  I've also reinstated the fatal errors on messing
    up opcode tables with duplicates.

            PR 26513
            * hash.h (htab_insert): Update prototype and comment.
            (struct string_tuple): Make "value" a const void*.
            (string_tuple_alloc): Likewise.
            (str_hash_find, str_hash_find_n): Cast returned value.
            (str_hash_insert): Add "replace" parameter, and return slot
pointer.
            Free alloc'd element when not inserted.
            * hash.c (htab_insert): Likewise.  Return slot when element exists,
            otherwise return NULL.
            * read.c (pop_insert): Insert into hash table without first
searching.
            * config/tc-avr.c (md_begin): Likewise.
            * config/tc-msp430.c (md_begin): Likewise.
            * config/tc-nds32.c (nds32_init_nds32_pseudo_opcodes): Likewise.
            * config/tc-v850.c (md_begin): Likewise.
            * macro.c (do_formals, define_macro, macro_expand_body): Likewise.
            (delete_macro): Delete from hash table.
            * config/tc-tic54x.c (subsym_create_or_replace): Correct logic.

            * symbols.c (local_symbol_make, symbol_table_insert): Allow
            replacement of hash table entries.
            * config/obj-coff-seh.c (seh_hash_insert): Likewise.
            * config/obj-coff.c (tag_insert): Likewise.
            * config/tc-iq2000.c (iq2000_add_macro): Likewise.
            * config/tc-m68k.c (md_begin): Likewise for aliases.
            * config/tc-tic4x.c (tic4x_asg): Likewise.
            * config/tc-tic6x.c (md_begin): Likewise.

            * dw2gencfi.c (dwcfi_hash_find_or_make): Disallow replacement of
            hash table entries.
            * ecoff.c (add_string, get_tag): Likewise.
            * macro.c (expand_irp): Likewise.
            * config/obj-elf.c (build_additional_section_info): Likewise.
            * config/tc-aarch64.c (insert_reg_alias): Likewise.
            (checked_hash_insert): Likewise.
            * config/tc-alpha.c (get_alpha_reloc_tag, md_begin): Likewise.
            * config/tc-arc.c (arc_insert_opcode, declare_register): Likewise.
            (declare_addrtype, md_begin, arc_extcorereg): Likewise.
            * config/tc-arm.c (insert_reg_alias): Likewise.
            (arm_tc_equal_in_insn, md_begin): Likewise.
            * config/tc-cr16.c (initialise_reg_hash_table, md_begin): Likewise.
            * config/tc-cris.c (md_begin): Likewise.
            * config/tc-crx.c (md_begin): Likewise.
            * config/tc-csky.c (md_begin): Likewise.
            * config/tc-d10v.c (md_begin): Likewise.
            * config/tc-dlx.c (md_begin): Likewise.
            * config/tc-ft32.c (md_begin): Likewise.
            * config/tc-h8300.c (md_begin): Likewise.
            * config/tc-hppa.c (md_begin): Likewise.
            * config/tc-i386.c (md_begin): Likewise.
            * config/tc-ia64.c (dot_rot, dot_entry, declare_register):
Likewise.
            (md_begin, dot_alias): Likewise.
            * config/tc-m68hc11.c (md_begin): Likewise.
            * config/tc-m68k.c (md_begin): Likewise.
            * config/tc-mcore.c (md_begin): Likewise.
            * config/tc-microblaze.c (md_begin): Likewise.
            * config/tc-mips.c (md_begin): Likewise.
            * config/tc-mmix.c (md_begin): Likewise.
            * config/tc-mn10200.c (md_begin): Likewise.
            * config/tc-mn10300.c (md_begin): Likewise.
            * config/tc-moxie.c (md_begin): Likewise.
            * config/tc-nds32.c (nds32_relax_hint, md_begin): Likewise.
            * config/tc-nios2.c (md_begin): Likewise.
            * config/tc-ns32k.c (md_begin): Likewise.
            * config/tc-pdp11.c (md_begin): Likewise.
            * config/tc-pj.c (fake_opcode, md_begin): Likewise.
            * config/tc-ppc.c (ppc_setup_opcodes): Likewise.
            * config/tc-pru.c (md_begin): Likewise.
            * config/tc-riscv.c (init_ext_version_hash): Likewise.
            (init_opcode_names_hash, hash_reg_name, init_opcode_hash):
Likewise.
            (riscv_init_csr_hash): Likewise.
            * config/tc-s390.c (s390_setup_opcodes, md_begin): Likewise.
            * config/tc-score.c (s3_insert_reg): Likewise.
            (s3_build_score_ops_hsh, s3_build_dependency_insn_hsh): Likewise.
            * config/tc-score7.c (s7_build_score_ops_hsh): Likewise.
            (s7_build_dependency_insn_hsh, s7_insert_reg): Likewise.
            * config/tc-sh.c (md_begin): Likewise.
            * config/tc-sparc.c (md_begin): Likewise.
            * config/tc-spu.c (md_begin): Likewise.
            * config/tc-tic30.c (md_begin): Likewise.
            * config/tc-tic4x.c (tic4x_inst_insert): Likewise.
            * config/tc-tic54x.c (stag_add_field_symbols, md_begin): Likewise.
            (tic54x_endstruct, tic54x_var, tic54x_macro_info): Likewise.
            (subsym_substitute): Likewise.
            * config/tc-tilegx.c (md_begin): Likewise.
            * config/tc-tilepro.c (md_begin): Likewise.
            * config/tc-vax.c (vip_begin): Likewise.
            * config/tc-wasm32.c (md_begin): Likewise.
            * config/tc-xgate.c (md_begin): Likewise.
            * config/tc-z8k.c (md_begin): Likewise.
            * testsuite/gas/ppc/dcbt.d,
            * testsuite/gas/ppc/dcbt.s: New test.
            * testsuite/gas/ppc/ppc.exp: Run it.

            * ecoff.c (add_string): Report fatal error on duplicates.
            * config/tc-alpha.c (md_begin): Likewise.
            * config/tc-arc.c (arc_insert_opcode, declare_register): Likewise.
            (declare_addrtype, md_begin, arc_extcorereg): Likewise.
            * config/tc-cr16.c (initialise_reg_hash_table, md_begin): Likewise.
            * config/tc-cris.c (md_begin): Likewise.
            * config/tc-crx.c (md_begin): Likewise.
            * config/tc-dlx.c (md_begin): Likewise.
            * config/tc-hppa.c (md_begin): Likewise.
            * config/tc-i386.c (md_begin): Likewise.
            * config/tc-ia64.c (dot_rot, dot_entry, declare_register):
Likewise.
            (md_begin): Likewise.
            * config/tc-m68k.c (md_begin): Likewise.
            * config/tc-mips.c (md_begin): Likewise.
            * config/tc-nios2.c (md_begin): Likewise.
            * config/tc-ns32k.c (md_begin): Likewise.
            * config/tc-ppc.c (ppc_setup_opcodes): Likewise.
            * config/tc-pru.c (md_begin): Likewise.
            * config/tc-riscv.c (init_ext_version_hash): Likewise.
            (init_opcode_names_hash, hash_reg_name, init_opcode_hash):
Likewise.
            * config/tc-s390.c (s390_setup_opcodes, md_begin): Likewise.
            * config/tc-sparc.c (md_begin): Likewise.
            * config/tc-tic30.c (md_begin): Likewise.
            * config/tc-tic4x.c (tic4x_inst_insert): Likewise.
            * config/tc-tilegx.c (md_begin): Likewise.
            * config/tc-tilepro.c (md_begin): Likewise.
            * config/tc-vax.c (vip_begin): Likewise.

            * config/tc-alpha.c,
            * config/tc-arm.c,
            * config/tc-avr.c,
            * config/tc-cr16.c,
            * config/tc-csky.c,
            * config/tc-i386.c,
            * config/tc-m68hc11.c,
            * config/tc-m68k.c,
            * config/tc-microblaze.c,
            * config/tc-ns32k.c,
            * config/tc-pj.c,
            * config/tc-ppc.c,
            * config/tc-score.c,
            * config/tc-score7.c,
            * config/tc-tic4x.c,
            * config/tc-tic54x.c,
            * config/tc-tilegx.c,
            * config/tc-tilepro.c,
            * config/tc-xgate.c: Formatting.

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