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Fri, 25 Oct 2024 03:35:07 +0000 (UTC) From: Kevin Buettner To: gdb-patches@sourceware.org Cc: Kevin Buettner Subject: [PATCH v3 07/11] Delete disabled i386 internal TLS support Date: Thu, 24 Oct 2024 19:26:25 -0700 Message-ID: <20241025033431.36274-8-kevinb@redhat.com> In-Reply-To: <20241025033431.36274-1-kevinb@redhat.com> References: <20241025033431.36274-1-kevinb@redhat.com> MIME-Version: 1.0 X-Scanned-By: MIMEDefang 3.4.1 on 10.30.177.4 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-Spam-Status: No, score=-11.8 required=5.0 tests=BAYES_00, DKIMWL_WL_HIGH, DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, DKIM_VALID_EF, GIT_PATCH_0, RCVD_IN_DNSWL_NONE, RCVD_IN_MSPIKE_H2, SPF_HELO_NONE, SPF_NONE, TXREP autolearn=ham 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-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~patchwork=sourceware.org@sourceware.org As mentioned in the previous commit, this commit deletes the disabled code which could be used to implement internal TLS support for the i386 target. --- gdb/i386-linux-tdep.c | 44 ------------------------------------------- 1 file changed, 44 deletions(-) diff --git a/gdb/i386-linux-tdep.c b/gdb/i386-linux-tdep.c index 8e9ffe984a3..9dec83ac753 100644 --- a/gdb/i386-linux-tdep.c +++ b/gdb/i386-linux-tdep.c @@ -753,45 +753,6 @@ i386_linux_displaced_step_copy_insn (struct gdbarch *gdbarch, return closure_; } -#if 0 -/* Disabled because fetching I386_GSBASE_REGNUM causes an internal - error. */ - -/* Fetch and return the TLS DTV (dynamic thread vector) address for PTID. - Throw a suitable TLS error if something goes wrong. */ - -static CORE_ADDR -i386_linux_get_tls_dtv_addr (struct gdbarch *gdbarch, ptid_t ptid, - enum linux_libc libc) -{ - /* On i386, the thread pointer is found in the gsbase register. */ - regcache *regcache - = get_thread_arch_regcache (current_inferior (), ptid, gdbarch); - target_fetch_registers (regcache, I386_GSBASE_REGNUM); - ULONGEST gsbase; - if (regcache->cooked_read (I386_GSBASE_REGNUM, &gsbase) != REG_VALID) - throw_error (TLS_GENERIC_ERROR, _("Unable to fetch thread pointer")); - - /* The thread pointer (gsbase) points at the TCB (thread control - block). The first two members of this struct are both pointers, - where the first will be a pointer to the TCB (i.e. it points at - itself) and the second will be a pointer to the DTV (dynamic - thread vector). There are many other fields too, but the one - we care about here is the DTV pointer. Compute the address - of the DTV pointer, fetch it, and convert it to an address. */ - CORE_ADDR dtv_ptr_addr - = gsbase + gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT; - gdb_byte buf[gdbarch_ptr_bit (gdbarch) / TARGET_CHAR_BIT]; - if (target_read_memory (dtv_ptr_addr, buf, sizeof buf) != 0) - throw_error (TLS_GENERIC_ERROR, _("Unable to fetch DTV address")); - - const struct builtin_type *builtin = builtin_type (gdbarch); - CORE_ADDR dtv_addr = gdbarch_pointer_to_address - (gdbarch, builtin->builtin_data_ptr, buf); - return dtv_addr; -} -#endif - static void i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) { @@ -1027,11 +988,6 @@ i386_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) /* Enable TLS support. */ set_gdbarch_fetch_tls_load_module_address (gdbarch, svr4_fetch_objfile_link_map); -#if 0 - set_gdbarch_get_thread_local_address (gdbarch, - linux_get_thread_local_address); - linux_register_tls_methods (info, gdbarch, i386_linux_get_tls_dtv_addr); -#endif /* Core file support. */ set_gdbarch_iterate_over_regset_sections