[Bug gas/26699] New: Failure to assemble aarch64 "isb sy" in LP64 Big Endian host environment

[ryo at nerv dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26699

            Bug ID: 26699
           Summary: Failure to assemble aarch64 "isb sy" in LP64 Big
                    Endian host environment
           Product: binutils
           Version: 2.36 (HEAD)
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: gas
          Assignee: unassigned at sourceware dot org
          Reporter: ryo at nerv dot org
  Target Milestone: ---

Created attachment 12884
  --> https://sourceware.org/bugzilla/attachment.cgi?id=12884&action=edit
use same type of the aarch64_name_value_pair

In parse_barrier() of gas/config/tc-aarch64.c,
The return value of hash_find_n() is casted to "const asm_barrier_opt *o" 
to access it, but struct aarch64_name_value_pair, which is the entity
returned by hash_find_n(), and asm_barrier_opt, which is not the same
in LP64 *BIG ENDIAN*, cannot be accessed correctly because the structure
of struct aarch64_name_value_pair and asm_barrier_opt are different.

Currently, the value of asm_barrier_opt is unsigned long, but it should be 
uint32 (or aarch64_insn) the same as the value of aarch64_name_value_pair.


I've tested this in the netbsd/aarch64_be environment.
The same thing should happen in an LP64EB environment. (e.g. sparc64)

  # uname -ap
  NetBSD rockpro64 9.99.73 NetBSD 9.99.73 (GENERIC64EB) #225: Thu Oct  1
16:24:38 JST 2020  ryo@subq:/usr/src/sys/arch/evbarm/compile/GENERIC64EB evbarm
aarch64eb
  # echo 'isb sy' | as
  {standard input}: Assembler messages:
  {standard input}:1: Error: the specified option is not accepted in ISB at
operand 1 -- `isb sy'

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