[PATCH] aarch64: increase alias candidate limit in aarch64-gen

[Richard Earnshaw (foss)]

On 19/08/2026 09:23, Muhammad Kamran wrote:
> Increase max_num_aliases from 32 to 64 so that aarch64-gen can
> accommodate the additional HINT-space alias added for FEAT_PAuth_LR.
> 

What were the symptoms of the overflow? A build time failure, a run-time assert, or crash, or just garbled output?


> The generated disassembler alias preference list can otherwise exceed
> the old fixed limit.
> ---
>  opcodes/aarch64-gen.c | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
> 
> diff --git a/opcodes/aarch64-gen.c b/opcodes/aarch64-gen.c
> index a387cd4a1e0..abe4147f2c4 100644
> --- a/opcodes/aarch64-gen.c
> +++ b/opcodes/aarch64-gen.c
> @@ -789,8 +789,8 @@ opcode_node *
>  find_alias_opcode (const aarch64_opcode *opcode)
>  {
>    int i;
> -  /* Assume maximum of 32 disassemble preference candidates.  */
> -  const int max_num_aliases = 32;
> +  /* Assume maximum of 64 disassemble preference candidates.  */
> +  const int max_num_aliases = 64;
>    const aarch64_opcode *ent;
>    const aarch64_opcode *preferred[max_num_aliases + 1];
>    opcode_node head, **next;