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CTRY:IE; LANG:en; SCL:1; SRV:; IPV:CAL; SFV:NSPM; H:64aa7808-outbound-1.mta.getcheckrecipient.com; PTR:ec2-63-35-35-123.eu-west-1.compute.amazonaws.com; CAT:NONE; SFS:(13230040)(35042699022)(1800799024)(82310400026)(376014)(36860700013); DIR:OUT; SFP:1101; X-OriginatorOrg: arm.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 29 Jul 2024 07:36:57.6916 (UTC) X-MS-Exchange-CrossTenant-Network-Message-Id: f0557e81-1e9d-485d-fa59-08dcafa139f7 X-MS-Exchange-CrossTenant-Id: f34e5979-57d9-4aaa-ad4d-b122a662184d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=f34e5979-57d9-4aaa-ad4d-b122a662184d; Ip=[63.35.35.123]; Helo=[64aa7808-outbound-1.mta.getcheckrecipient.com] X-MS-Exchange-CrossTenant-AuthSource: DB1PEPF000509EE.eurprd03.prod.outlook.com X-MS-Exchange-CrossTenant-AuthAs: Anonymous X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: PAVPR08MB9063 X-Spam-Status: No, score=-2.5 required=5.0 tests=BAYES_00, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, FORGED_SPF_HELO, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_PASS, SPF_NONE, TXREP, UNPARSEABLE_RELAY autolearn=no autolearn_force=no version=3.4.6 X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on server2.sourceware.org X-BeenThere: gdb@sourceware.org X-Mailman-Version: 2.1.30 Precedence: list List-Id: Gdb mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Luis Machado via Gdb Reply-To: Luis Machado Errors-To: gdb-bounces~public-inbox=simark.ca@sourceware.org Sender: "Gdb" On 7/28/24 18:33, Max Larsson via Gdb wrote: > Hi everyone, > > I porting or better trying to report GDB to the AmigaOS 4 PPC target (elf > based). > I already succeeded in (re)porting the binutils stuff, but I'm stuck with > GDB. > > I have a working nat, which can create an inferior, set breakpoints,etc.. > but > because the target has a shared memory model, the inferior is not accessible > at the vma addresses as specified in the elf format. Currently I'm trying > to translate > the vma addresses used by the gdb core to the physical address where the > inferior > ist loaded. > > I found in the source the method "set_gdbarch_has_shared_address_space" and I think the gdbarch_has_shared_address_space gets used to tell gdb to reuse the address space rather than creating a new one, which is a step in the right direction. > "exec_set_action_address", with which I think I could tell the gdb core exec_set_section_address I suppose? That seems to get used in some places still, which is good. I think objfile_relocate is something that should be used here (maybe indirectly through some other means), maybe alongside some information about where in memory things were loaded for your case. But I can't see a way for you to directly influence the way is works. > where the inferior > is loaded, so that I don't need to translate the address, but until know I > wasn't > able to use them correctly. > > So can someone give me a hint how to realize that, or how gdb support such > a target, > or not? I can tell gdb supports/used to support uclinux, but I'm not sure about the state of such support currently. Maybe set_objfile_default_section_offset, which eventually calls objfile_relocate could provide hints on how you could change gdb's view of the memory positioning. Also, check gdb/tic6x-linux-tdep.c and how it relocates things through a solib layer (gdb/solib-dsbt.c I think). For instance, dsbt_relocate_main_executable.