Handling of mips disassembly by gdb

[Andrew Cagney]

Will Cohen wrote:
> 
> The disassembly performed by the function _print_insn_mips in
> opcode/mips-dis.c is dependent on the mach field of the struct info
> passed to the function.  Unfortunately the mach field is alway set to
> zero because TM_PRINT_INSN_MACH is defined to be 0 in
> gdb/config/mips/tm-mip.h.  Is there a reason that this must be set to
> zero?  Wouldn't it be more appropriate to set it to
> ((TARGET_PRINT_INSN_INFO)->mach)? Changing this line allows the
> disassembler to generate model specific instructions.
> 
> Should I generate a patch to fix this and submit it to binutils?  Or is
> there a reason this define was set to zero?

You may want to check exactly how objdump handles things like MIPS16 vs
MIPS-1-IV code and ARM vs THUMB.  By default, GDB just calls the
dissassembler and hopes that it knows what the architecture is for the
current memory range.

For your case, does a simple objdump dissassemble code the way you
expect?

	Andrew