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[173.197.98.123]) by smtp.gmail.com with ESMTPSA id c63sm27368589pfk.79.2017.07.15.02.43.00 (version=TLS1_2 cipher=ECDHE-RSA-AES128-GCM-SHA256 bits=128/128); Sat, 15 Jul 2017 02:43:01 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=sender:from:to:cc:subject:date:message-id:in-reply-to:references; bh=v7WGv3BH4klOGL4TNykm0pjMZLu7EoBx9oZhVsyhFVo=; b=iqnT/Zp+nNdN3wapj1Tv2hXx8fo+xYm2Ozf26u0lC6fsLWSdQ/gvL8qzMmL5tl+Wlu dMbH+xlnDumQKRo3gFCH5XY0IZ6eWQ8t1LXxxjLbSBKBWpLMNeX1m4qsga42yIxiuMtV riFhS5UxcWJuplht64PJqXDWhyY4wVfv1gdIbK3IK+32GLRiXAHqhNrBZLKMb/kOIabC q5Ofl9ym9OjFtrgLL6f37FFkAqJ78wEgU9kjG2mFFgSngQzjOmSSaEXD3/O4mNDB2RhC JwfnMnzDNTFNbG4JSz1OpUZ3ikNQlFyLEmcYyqjEgY2ZYbL8shW9hZB/gCPpK0CFMqO1 uWIg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:sender:from:to:cc:subject:date:message-id :in-reply-to:references; bh=v7WGv3BH4klOGL4TNykm0pjMZLu7EoBx9oZhVsyhFVo=; b=WZQUbQ36pjHjyQfCgbo1NZTJEaMj0/XChkN/LmuhQ78iM7/Gdk53UUzJbsntjP9i68 EJF45r4/BAwfkCNWR5/hKQc+iR5gFpKeRZLe/ULlDEMI6K0iuCdTBxESwFV+DMfemOcb mIZymsQAVZTOe5ie1lh3qtt/G30rwYj3xY6JLrYVuPSlecNaxFvPTL3EFSkaFpbF+K5R Ybi4CwTbfLcat2YBXNJLiVmmx77o57+XCEgNOBQ4hpjelsmH1KMGN/CA/o0HypqtqhCJ Q4nYY7Um1t6sQzMcPR3tuIgZr1keKW1wNCAvDAFSOtNq8fmr4CxaQkNoPDejicqb1SGd R62w== X-Gm-Message-State: AIVw111y95zSkr2iJsifiUa1ogLiK4//oF44dVISFjWQGU6bk1aN+JDb KzVqLcfLbI55LdF6sLQ= X-Received: by 10.84.143.34 with SMTP id 31mr20509167ply.198.1500111782337; Sat, 15 Jul 2017 02:43:02 -0700 (PDT) From: Richard Henderson To: qemu-devel@nongnu.org Date: Fri, 14 Jul 2017 23:42:15 -1000 Message-Id: <20170715094243.28371-7-rth@twiddle.net> X-Mailer: git-send-email 2.9.4 In-Reply-To: <20170715094243.28371-1-rth@twiddle.net> References: <20170715094243.28371-1-rth@twiddle.net> X-detected-operating-system: by eggs.gnu.org: Genre and OS details not recognized. X-Received-From: 2607:f8b0:400e:c05::242 Subject: [Qemu-devel] [PATCH v14 06/34] target/arm: Delay check for magic kernel page X-BeenThere: qemu-devel@nongnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: pbonzini@redhat.com, cota@braap.org, alex.bennee@linaro.org, vilanova@ac.upc.edu, crosthwaite.peter@gmail.com Errors-To: qemu-devel-bounces+importer=patchew.org@nongnu.org Sender: "Qemu-devel" X-ZohoMail-DKIM: fail (Header signature does not verify) X-ZohoMail: RDKM_2 RSF_0 Z_629925259 SPT_0 Content-Transfer-Encoding: quoted-printable MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" There's nothing magic about the exception that we generate in order to execute the magic kernel page. We can and should allow gdb to set a breakpoint at this location. Signed-off-by: Richard Henderson Reviewed-by: Emilio G. Cota --- target/arm/translate.c | 22 +++++++++++----------- 1 file changed, 11 insertions(+), 11 deletions(-) diff --git a/target/arm/translate.c b/target/arm/translate.c index fea76fb..2ae68ce 100644 --- a/target/arm/translate.c +++ b/target/arm/translate.c @@ -11930,17 +11930,6 @@ void gen_intermediate_code(CPUState *cs, Translati= onBlock *tb) 0); num_insns++; =20 -#ifdef CONFIG_USER_ONLY - /* Intercept jump to the magic kernel page. */ - if (dc->pc >=3D 0xffff0000) { - /* We always get here via a jump, so know we are not in a - conditional execution block. */ - gen_exception_internal(EXCP_KERNEL_TRAP); - dc->is_jmp =3D DISAS_NORETURN; - break; - } -#endif - if (unlikely(!QTAILQ_EMPTY(&cs->breakpoints))) { CPUBreakpoint *bp; QTAILQ_FOREACH(bp, &cs->breakpoints, entry) { @@ -11972,6 +11961,17 @@ void gen_intermediate_code(CPUState *cs, Translati= onBlock *tb) gen_io_start(); } =20 +#ifdef CONFIG_USER_ONLY + /* Intercept jump to the magic kernel page. */ + if (dc->pc >=3D 0xffff0000) { + /* We always get here via a jump, so know we are not in a + conditional execution block. */ + gen_exception_internal(EXCP_KERNEL_TRAP); + dc->is_jmp =3D DISAS_NORETURN; + break; + } +#endif + if (dc->ss_active && !dc->pstate_ss) { /* Singlestep state is Active-pending. * If we're in this state at the start of a TB then either --=20 2.9.4