From: Florian Weimer <fw@deneb.enyo.de>
To: Szabolcs Nagy <szabolcs.nagy@arm.com>
Cc: libc-alpha@sourceware.org, Sudakshina Das <Sudi.Das@arm.com>
Subject: Re: [PATCH 11/12] aarch64: redefine RETURN_ADDRESS to strip PAC
Date: Mon, 11 May 2020 21:22:32 +0200 [thread overview]
Message-ID: <87y2py46pz.fsf@mid.deneb.enyo.de> (raw)
In-Reply-To: <20200430174518.GG29015@arm.com> (Szabolcs Nagy's message of "Thu, 30 Apr 2020 18:45:18 +0100")
* Szabolcs Nagy:
> +/* This is needed when glibc is built with -mbranch-protection=pac-ret. */
> +#undef RETURN_ADDRESS
> +#define RETURN_ADDRESS(n) XPAC(__builtin_return_address(n))
This looks suspicious. Is __builtin_return_address ever useful
without the decoding? If not, why doesn't GCC emit the PAC removal
itself?
next prev parent reply other threads:[~2020-05-11 19:22 UTC|newest]
Thread overview: 48+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-30 17:34 [PATCH 00/12] aarch64: branch protection support Szabolcs Nagy
2020-04-30 17:37 ` [PATCH 01/12] elf.h: Add PT_GNU_PROPERTY Szabolcs Nagy
2020-05-07 14:49 ` Adhemerval Zanella
2020-04-30 17:37 ` [PATCH 02/12] elf.h: add aarch64 property definitions Szabolcs Nagy
2020-05-07 14:50 ` Adhemerval Zanella
2020-04-30 17:39 ` [PATCH 03/12] aarch64: Add BTI landing pads to assembly code Szabolcs Nagy
2020-05-07 16:55 ` Adhemerval Zanella
2020-05-11 11:38 ` Szabolcs Nagy
2020-05-11 19:13 ` Adhemerval Zanella
2020-04-30 17:40 ` [PATCH 04/12] aarch64: Rename place holder .S files to .c Szabolcs Nagy
2020-05-07 18:29 ` Adhemerval Zanella
2020-04-30 17:41 ` [PATCH 05/12] aarch64: fix swapcontext for BTI Szabolcs Nagy
2020-05-07 18:42 ` Adhemerval Zanella
2020-04-30 17:42 ` [PATCH 06/12] aarch64: fix RTLD_START " Szabolcs Nagy
2020-05-07 18:49 ` Adhemerval Zanella
2020-05-07 19:24 ` Szabolcs Nagy
2020-05-07 19:55 ` Adhemerval Zanella
2020-05-07 20:14 ` Szabolcs Nagy
2020-05-07 20:20 ` Adhemerval Zanella
2020-04-30 17:42 ` [PATCH 07/12] aarch64: fix syscalls " Szabolcs Nagy
2020-05-07 19:40 ` Adhemerval Zanella
2020-05-11 11:46 ` Szabolcs Nagy
2020-04-30 17:43 ` [PATCH 08/12] Rewrite abi-note.S in C Szabolcs Nagy
2020-04-30 20:07 ` Zack Weinberg
2020-05-01 9:23 ` Szabolcs Nagy
2020-05-01 14:07 ` Zack Weinberg
2020-04-30 17:44 ` [PATCH 09/12] aarch64: support BTI enabled binaries Szabolcs Nagy
2020-05-07 21:07 ` Adhemerval Zanella
2020-05-11 11:04 ` Szabolcs Nagy
2020-05-11 18:38 ` Adhemerval Zanella
2020-04-30 17:44 ` [PATCH 10/12] aarch64: Add pac-ret support to asm files Szabolcs Nagy
2020-05-08 16:59 ` Adhemerval Zanella
2020-05-11 8:27 ` Szabolcs Nagy
2020-05-11 18:39 ` Adhemerval Zanella
2020-04-30 17:45 ` [PATCH 11/12] aarch64: redefine RETURN_ADDRESS to strip PAC Szabolcs Nagy
2020-05-08 17:44 ` Adhemerval Zanella
2020-05-11 12:38 ` Szabolcs Nagy
2020-05-11 19:15 ` Adhemerval Zanella
2020-05-11 19:21 ` Florian Weimer
2020-05-11 20:13 ` Adhemerval Zanella
2020-05-11 20:18 ` Florian Weimer
2020-05-11 19:22 ` Florian Weimer [this message]
2020-05-11 20:45 ` Adhemerval Zanella
2020-05-12 8:42 ` Szabolcs Nagy
2020-04-30 17:45 ` [PATCH 12/12] aarch64: Configure option to build glibc with branch protection Szabolcs Nagy
2020-04-30 19:02 ` Joseph Myers
2020-05-08 17:53 ` Adhemerval Zanella
2020-05-04 11:27 ` [PATCH 00/12] aarch64: branch protection support Szabolcs Nagy
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