From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: from simark.ca by simark.ca with LMTP id 9CSVIoSm8GL7oiIAWB0awg (envelope-from ) for ; Mon, 08 Aug 2022 02:00:36 -0400 Received: by simark.ca (Postfix, from userid 112) id 7ED7C1EA05; Mon, 8 Aug 2022 02:00:36 -0400 (EDT) Authentication-Results: simark.ca; dkim=pass (1024-bit key; secure) header.d=sourceware.org header.i=@sourceware.org header.a=rsa-sha256 header.s=default header.b=DigrK0A+; dkim-atps=neutral X-Spam-Checker-Version: SpamAssassin 3.4.6 (2021-04-09) on simark.ca X-Spam-Level: X-Spam-Status: No, score=-2.0 required=5.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID,DKIM_VALID_AU,MAILING_LIST_MULTI,RDNS_DYNAMIC, UNPARSEABLE_RELAY,URIBL_BLOCKED autolearn=ham autolearn_force=no version=3.4.6 Received: from sourceware.org (ip-8-43-85-97.sourceware.org [8.43.85.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (2048 bits) server-digest SHA256) (No client certificate requested) by simark.ca (Postfix) with ESMTPS id 1D88F1E745 for ; Mon, 8 Aug 2022 02:00:31 -0400 (EDT) Received: from server2.sourceware.org (localhost [IPv6:::1]) by sourceware.org (Postfix) with ESMTP id 5ED2C385736A for ; Mon, 8 Aug 2022 06:00:29 +0000 (GMT) DKIM-Filter: OpenDKIM Filter v2.11.0 sourceware.org 5ED2C385736A DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=sourceware.org; s=default; t=1659938429; bh=xYdnVJqAWhszBbIGr64WKWyXmFQcVxPzKxircjJOYiM=; h=To:Subject:Date:List-Id:List-Unsubscribe:List-Archive:List-Post: List-Help:List-Subscribe:From:Reply-To:Cc:From; b=DigrK0A+xFBa+95DHzYd+3KWlNy8dsGSvztqin9kEQL/3Qcwl4JI0oq7cI9EtoAEp SHfQlsaSUjA1TTpW+B+VslaOwzeoRAUMHk2dy8vPYhR6bdozhGVZmAwl7sgKe0H/iV YIeRQqxkhlKoax9UrgInvDZULmFzn31vZ8P4usKo= Received: from out30-54.freemail.mail.aliyun.com (out30-54.freemail.mail.aliyun.com [115.124.30.54]) by sourceware.org (Postfix) with ESMTPS id DCD813858287 for ; Mon, 8 Aug 2022 06:00:07 +0000 (GMT) DMARC-Filter: OpenDMARC Filter v1.4.1 sourceware.org DCD813858287 X-Alimail-AntiSpam: AC=PASS; BC=-1|-1; BR=01201311R901e4; CH=green; DM=||false|; DS=||; FP=0|-1|-1|-1|0|-1|-1|-1; HT=ay29a033018045176; MF=jiangshuai_li@linux.alibaba.com; NM=1; PH=DS; RN=2; SR=0; TI=SMTPD_---0VLcfrDw_1659938401; Received: from lijsh-VirtualBox.hz.ali.com(mailfrom:jiangshuai_li@linux.alibaba.com fp:SMTPD_---0VLcfrDw_1659938401) by smtp.aliyun-inc.com; Mon, 08 Aug 2022 14:00:02 +0800 To: gdb-patches@sourceware.org Subject: [PATCH] gdb/csky add unwinder for sigtramp frame when kernel 4.x and later Date: Mon, 8 Aug 2022 14:00:00 +0800 Message-Id: <20220808060000.10587-1-jiangshuai_li@linux.alibaba.com> X-Mailer: git-send-email 2.25.1 MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-BeenThere: gdb-patches@sourceware.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Gdb-patches mailing list List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , From: Jiangshuai Li via Gdb-patches Reply-To: Jiangshuai Li Cc: Jiangshuai Li Errors-To: gdb-patches-bounces+public-inbox=simark.ca@sourceware.org Sender: "Gdb-patches" When kernel veriosn >= V4.x, the characteristic values used to determine whether it is a signal function call are: movi r7, 139 trap 0 Registers are saved at (sp + CSKY_SIGINFO_OFFSET + CSKY_SIGINFO_SIZE + CSKY_UCONTEXT_SIGCONTEXT + CSKY_SIGCONTEXT_PT_REGS_TLS). The order is described in csky_linux_rt_sigreturn_init_pt_regs. --- gdb/csky-linux-tdep.c | 47 +++++++++++++++++++++++++++++++++++++++++++ gdb/csky-tdep.h | 6 ++++++ 2 files changed, 53 insertions(+) diff --git a/gdb/csky-linux-tdep.c b/gdb/csky-linux-tdep.c index 106f629b8b0..89d3a60c43c 100644 --- a/gdb/csky-linux-tdep.c +++ b/gdb/csky-linux-tdep.c @@ -353,6 +353,51 @@ csky_linux_rt_sigreturn_tramp_frame = { csky_linux_rt_sigreturn_init }; +static void +csky_linux_rt_sigreturn_init_pt_regs (const struct tramp_frame *self, + struct frame_info *this_frame, + struct trad_frame_cache *this_cache, + CORE_ADDR func) +{ + int i; + CORE_ADDR sp = get_frame_register_unsigned (this_frame, CSKY_SP_REGNUM); + + CORE_ADDR base = sp + CSKY_SIGINFO_OFFSET + CSKY_SIGINFO_SIZE + + CSKY_UCONTEXT_SIGCONTEXT + + CSKY_SIGCONTEXT_PT_REGS_TLS; + + /* LR */ + trad_frame_set_reg_addr (this_cache, CSKY_R15_REGNUM, base); + + /* PC */ + trad_frame_set_reg_addr (this_cache, CSKY_PC_REGNUM, base + 4); + + /* PSR */ + trad_frame_set_reg_addr (this_cache, CSKY_CR0_REGNUM, base + 8); + + /* SP */ + trad_frame_set_reg_addr (this_cache, CSKY_SP_REGNUM, base + 12); + + /* Set addrs of R0 ~ R13. */ + for (i = 0; i < 14; i++) + trad_frame_set_reg_addr (this_cache, i, base + i * 4 + 20); + + trad_frame_set_id (this_cache, frame_id_build (sp, func)); +} + + +static struct tramp_frame +csky_linux_rt_sigreturn_tramp_frame_kernel_4x = { + SIGTRAMP_FRAME, + 4, + { + { CSKY_MOVI_R7_139, ULONGEST_MAX }, + { CSKY_TRAP_0, ULONGEST_MAX }, + { TRAMP_SENTINEL_INSN } + }, + csky_linux_rt_sigreturn_init_pt_regs +}; + /* Hook function for gdbarch_register_osabi. */ static void @@ -378,6 +423,8 @@ csky_linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch) tramp_frame_prepend_unwinder (gdbarch, &csky_linux_rt_sigreturn_tramp_frame); + tramp_frame_prepend_unwinder (gdbarch, + &csky_linux_rt_sigreturn_tramp_frame_kernel_4x); } void _initialize_csky_linux_tdep (); diff --git a/gdb/csky-tdep.h b/gdb/csky-tdep.h index 3ee50fc5931..f845b9ab744 100644 --- a/gdb/csky-tdep.h +++ b/gdb/csky-tdep.h @@ -379,4 +379,10 @@ enum csky_regnum #define CSKY_MOVI_R7_173 0x00adea07 #define CSKY_TRAP_0 0x2020c000 +/* Sizeof (tls) */ +#define CSKY_SIGCONTEXT_PT_REGS_TLS 4 + +/* Macro for kernel 4.x */ +#define CSKY_MOVI_R7_139 0x008bea07 + #endif -- 2.25.1