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DIR:OUT; SFP:1101; X-MS-Exchange-AntiSpam-MessageData-ChunkCount: 1 X-MS-Exchange-AntiSpam-MessageData-0: Rvc92grOZSS/V2zmtHJ5ygBPxBCWKRHO72Gt5U/oQUuuGwN9GolfXoXVzHL21pzWutL/zy9fUfxmtFP/w8N35VdqKk5OM02txTF1n6/jPDEA1wZ1Hxkrd/O/VLH6D5rZZQS3I5bKto7l6MwOIi4yakvX/RIJxU4cIQjSa58gUHjq25lFrjNZ3W90+FzHFT1EqFtH7rXDCybHLGo5qWdHtKyiBxLRpk8/TOMTtPwbHQWhunI0xPXFp4Ym238VkUS3kMgwLEx6zJrsGy1eio60q7OT7k8Ur1YgdYSv0BgwxfemzlDeLCgs8STnR/tekQkknAxdN4adQiivgo2UKDUZjWrNpH/L3Qwi26EQC7M1IUNi8SLXFh8Szoj2NDicNdgYIh2oQ6gGa+HzIKDONS0AQ/ZPKudPgAV8l/dq4AtFryx7Tq1fzY6a+HI43k4BhSXB X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 11 Aug 2026 13:13:02.1846 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: 3e9b5ead-6cec-47ff-2d38-08def7aa45eb X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[4.158.2.129]; Helo=[outbound-uk1.az.dlp.m.darktrace.com] X-MS-Exchange-CrossTenant-AuthSource: AM2PEPF0001C717.eurprd05.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: VI1PR08MB5389 X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: gdb-patches-bounces~public-inbox=simark.ca@sourceware.org This series fixes a GDB inferior-call issue exposed by malloc being a GNU IFUNC in glibc on AArch64. The underlying problem is not AArch64-specific: it can affect any inferior helper found through find_function_in_inferior's minimal-symbol fallback when that helper is a GNU IFUNC. 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. Patch 1 checks the minimal symbol kind directly and propagates the GNU IFUNC marker to the synthetic function type for mst_text_gnu_ifunc and mst_data_gnu_ifunc symbols. The existing fallback address and return type are unchanged. Patch 2 fixes the follow-on return-type issue after IFUNC resolution. When the resolved target type, or the type inferred from the resolver return type, does not provide a usable return type, find_function_addr now keeps the original function type's return type. This preserves the synthetic fallback return type used by find_function_in_inferior ("malloc"). The tests add an internal inferior-call case using an IFUNC malloc and run it through the existing gdb.base/gnu-ifunc.exp matrix for resolver attr, resolver debug info, and resolved-target debug info. Changes since v4: * Address feedback from Andrew Burgess . Changes since v3: * Move the ifunc resolver into a shared library. Changes since v2: * Rework the minimal-symbol fallback to check the minimal symbol kind directly as suggested by Simon. * Add coverage for both debug and no-debug IFUNC malloc variants by using the existing framework. * Preserve the original IFUNC return type when the resolved target type is unknown. Muhammad Kamran (2): gdb: Preserve IFUNC marker when finding inferior functions gdb: Keep original IFUNC return type when target type is unknown gdb/infcall.c | 12 ++- .../gdb.base/gnu-ifunc-inferior-call-final.c | 27 +++++ .../gnu-ifunc-inferior-call-resolver.c | 43 ++++++++ .../gdb.base/gnu-ifunc-inferior-call.c | 37 +++++++ gdb/testsuite/gdb.base/gnu-ifunc.exp | 98 +++++++++++++++++++ gdb/valops.c | 5 + 6 files changed, 220 insertions(+), 2 deletions(-) create mode 100644 gdb/testsuite/gdb.base/gnu-ifunc-inferior-call-final.c create mode 100644 gdb/testsuite/gdb.base/gnu-ifunc-inferior-call-resolver.c create mode 100644 gdb/testsuite/gdb.base/gnu-ifunc-inferior-call.c -- 2.43.0