Kito Cheng kito.cheng@gmail.com
Tue Aug 21 15:54:00 GMT 2018

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Hi Jim:

Current assembler will accept empty operand for fence and rounding
mode, such as "fence ," or "fadd.s fa1,fa1,fa1,", it cause by strncmp
with zero length in arg_lookup function.

This patch including the fix and add 2 test cases for that, those case
was explored by LLVM's MC fuzzer testing tool developed by Ana's team
(Codeaurora) :)


gas/ChangeLog

2018-08-21  Kito Cheng  <kito@andestech.com>

        * config/tc-riscv.c (arg_lookup): Checking
        lenght before look up.
        * testsuite/gas/riscv/fence-fail.d: New file.
        * testsuite/gas/riscv/fence-fail.l: Likewise.
        * testsuite/gas/riscv/fence-fail.s: Likewise.
        * testsuite/gas/riscv/rouding-fail.d: Likewise.
        * testsuite/gas/riscv/rouding-fail.l: Likewise.
        * testsuite/gas/riscv/rouding-fail.s: Likewise.

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