Re: [PATCH 0/1] gdb: Preserve IFUNC marker when finding inferior functions

[Yury Khrustalev <yury.khrustalev@arm.com>]

On Wed, Jun 24, 2026 at 09:50:01AM +0000, Muhammad Kamran wrote:
> This patch fixes a GDB inferior-call issue exposed by malloc being a GNU
> IFUNC in glibc on AArch64.
> 
> GDB calls find_function_in_inferior ("malloc") when expression evaluation
> needs to allocate memory in the inferior, for example for string literal
> arguments.  In the minimal-symbol fallback, GDB created a synthetic ordinary
> function pointer from the minimal symbol address.  If the symbol was a GNU
> IFUNC, this lost the IFUNC marker, so call_function_by_hand did not
> resolve the symbol before calling it.
> 
> The patch uses find_minsym_type_and_address to classify the minimal symbol
> and propagates the IFUNC marker to the synthetic function type when needed.
> The existing fallback return type is unchanged.

Thanks! I confirm that all GDB testsuites that showed regressions now
pass with Glibc from master and this patch applied on top of GDB master.

> 
> Should this be considered for backporting to release branches?

Yes please, at least GDB 16.x and 17.x I think should be covered.

Kind regards,
Yury