[PATCH, testsuite]: Do not run simulate-thread on alpha*-*-linux*

[Uros Bizjak]

On Wed, Nov 16, 2011 at 10:46 PM, Richard Henderson <rth@redhat.com> wrote:
>> +/* Checks for an atomic sequence of instructions beginning with a LWARX/LDARX
>> +   instruction and ending with a STWCX/STDCX instruction.  If such a sequence
>> +   is found, attempt to step through it.  A breakpoint is placed at the end of
>> +   the sequence.  */
>> +
>
> s/LWARX/LDL_L/g
> s/LDARX/LDQ_L/g
> s/STWCX/STL_C/g
> s/STDCX/STQ_C/g
>
>> +          int immediate = ((insn & 0x001fffff) << 2);
>> +
>> +          if (bc_insn_count >= 1)
>> +            return 0; /* More than one conditional branch found, fallback
>> +                         to the standard single-step code.  */
>> +
>> +       breaks[1] = loc + ALPHA_INSN_SIZE + immediate;
>
> The immediate needs to be sign-extended.  Add:
>
>  immedaite = (immediate ^ 0x400000) - 0x400000;
>
> Otherwise your computation of the address is correct.

Thanks, corrected gdb patch is at [1].

[1] http://sourceware.org/ml/gdb-patches/2011-11/msg00457.html

Uros.