arc: Add disassembler helper
authorAnton Kolesov <Anton.Kolesov@synopsys.com>
Fri, 10 Feb 2017 11:12:06 +0000 (14:12 +0300)
committerAnton Kolesov <Anton.Kolesov@synopsys.com>
Tue, 28 Mar 2017 18:36:35 +0000 (21:36 +0300)
commiteea787570f708e51048f812808e6cbd76fde6919
treeb3df9e1ebf01db2652e0c1b99cab8b68e814eddb
parent3be78afdeddd3ebf57eb0df8b029cf596f468c7a
arc: Add disassembler helper

Add disassembler helper for GDB, that uses opcodes structure arc_instruction
and adds convenience functions to handle instruction operands.  This interface
solves at least those problems with arc_instruction:

  * Some instructions, like "push_s", have implicit operands which are not
    directly present in arc_instruction.
  * Operands of particular meaning, like branch/jump targets, have various
    locations and meaning depending on type of branch/target.
  * Access to operand value is abstracted into a separate function, so callee
    code shouldn't bother if operand value is an immediate value or in a
    register.

Testcases included in this commit are fairly limited - they test exclusively
branch instructions, something that will be used in software single stepping.
Most of the other parts of this disassembler helper are tested during prologue
analysis testing.

gdb/ChangeLog:

yyyy-mm-dd  Anton Kolesov  <anton.kolesov@synopsys.com>

* configure.tgt: Add arc-insn.o.
* arc-tdep.c (arc_delayed_print_insn): Make non-static.
(dump_arc_instruction_command): New function.
(arc_fprintf_disasm): Likewise.
(arc_disassemble_info): Likewise.
(arc_insn_get_operand_value): Likewise.
(arc_insn_get_operand_value_signed): Likewise.
(arc_insn_get_memory_base_reg): Likewise.
(arc_insn_get_memory_offset): Likewise.
(arc_insn_get_branch_target): Likewise.
(arc_insn_dump): Likewise.
(arc_insn_get_linear_next_pc): Likewise.
* arc-tdep.h (arc_delayed_print_insn): Add function declaration.
(arc_disassemble_info): Likewise.
(arc_insn_get_branch_target): Likewise.
(arc_insn_get_linear_next_pc): Likewise.
* NEWS: Mention new "maint print arc arc-instruction".

gdb/doc/ChangeLog:

yyyy-mm-dd  Anton Kolesov  <anton.kolesov@synopsys.com>

* gdb.texinfo (Synopsys ARC): Add "maint print arc arc-instruction".

gdb/testsuite/ChangeLog:

yyyy-mm-dd  Anton Kolesov  <anton.kolesov@synopsys.com>

* gdb.arch/arc-decode-insn.S: New file.
* gdb.arch/arc-decode-insn.exp: Likewise.
gdb/ChangeLog
gdb/NEWS
gdb/arc-tdep.c
gdb/arc-tdep.h
gdb/doc/ChangeLog
gdb/doc/gdb.texinfo
gdb/testsuite/ChangeLog
gdb/testsuite/gdb.arch/arc-decode-insn.S [new file with mode: 0644]
gdb/testsuite/gdb.arch/arc-decode-insn.exp [new file with mode: 0644]