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Registered in England and Wales under Company Registration No. 3798903 From: David Howells In-Reply-To: References: <20200608224725.GH1605@shell.armlinux.org.uk> To: Nicolas Pitre Subject: Re: [PULL REQUEST v2] FDPIC ELF support for ARM MIME-Version: 1.0 Content-ID: <2913174.1591690012.1@warthog.procyon.org.uk> Date: Tue, 09 Jun 2020 09:06:52 +0100 Message-ID: <2913175.1591690012@warthog.procyon.org.uk> X-Scanned-By: MIMEDefang 2.79 on 10.5.11.14 X-Mimecast-Spam-Score: 0 X-Mimecast-Originator: redhat.com X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20200609_010701_050698_1E361412 X-CRM114-Status: GOOD ( 10.37 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: dhowells@redhat.com, Russell King - ARM Linux admin , linux-arm-kernel@lists.infradead.org, Alexander Viro Content-Type: text/plain; charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+infradead-linux-arm-kernel=archiver.kernel.org@lists.infradead.org Nicolas Pitre wrote: > Well... of course it could also be silly to run gdb on ELF_FDPIC-only > systems as such systems are expected to have highly constrained > resources. gdbserver and kgdb work. But on a NOMMU system, FDPIC allows for executable and library text segment and rodata segment sharing and you can't set breakpoints by instruction substitution in anything that's shared - uclibc, for example - so you have to be very careful. David _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel