From nobody Tue Feb 10 11:32:43 2026 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 5A36DC76195 for ; Mon, 27 Mar 2023 15:07:22 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232486AbjC0PHV (ORCPT ); Mon, 27 Mar 2023 11:07:21 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50002 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S232065AbjC0PHL (ORCPT ); Mon, 27 Mar 2023 11:07:11 -0400 Received: from mail-ed1-x536.google.com (mail-ed1-x536.google.com [IPv6:2a00:1450:4864:20::536]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 198B11B0 for ; Mon, 27 Mar 2023 08:07:10 -0700 (PDT) Received: by mail-ed1-x536.google.com with SMTP id b20so37595427edd.1 for ; Mon, 27 Mar 2023 08:07:10 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; t=1679929628; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:from:to:cc:subject:date:message-id :reply-to; bh=4F21eaCjPlHPX0mt5BYCkFL5YU30FB5WE06H9+TgyGM=; b=Nk8teTJSKpMvzOa2aMHyMoIsxBKdK0bqysKUKWgePW4/z76CuPzpsa2b9Svg7JXOua ls6++OZGzpLGm2yBZC1w3G/FdDMXQutiA7p/DqRBiiqQ/NHmLhrQa/wjG/GOZFyjuTWP eSkjeOLKdDPKy5v835waRLRiQO7MXqQqFQSfM= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; t=1679929628; h=cc:to:in-reply-to:references:message-id:content-transfer-encoding :mime-version:subject:date:from:x-gm-message-state:from:to:cc :subject:date:message-id:reply-to; bh=4F21eaCjPlHPX0mt5BYCkFL5YU30FB5WE06H9+TgyGM=; b=pp/MNi4RDiUrJtlHcI8adZ8jJvbUYHp5W15HUibWlNgb33tbgkto/gF7pTVVwRIsIp 6prTcahDF8WT0ye78kIBq1+LAeWtK71d5P3jbuwNSFmR1M7uXkzAt8VB273wN//hunpN 8CBEBZjpNlOphQvURlhU6jE0pJLvSU6MVL8RNLlu3PjWe3n3tAzyF/+Zjn67Yj8pCHpD +4YtyAngd8kAHAh50cCFzvyGqJ+ISWJGjhVxkXTpSGxl1D168tK77mDa6+3dmoGytQCX +lGoIJ8x73febup3WlFHSxV5H2TVUOMPEgfnFVKgaDA2IcbG8p6Pd3u36AoryqSvEpf6 v2vA== X-Gm-Message-State: AAQBX9cg6YzuuBWXvndiuiyr6XmwfqC49Q8UyF1XKUsRKc3Pev8B0Wm6 AVq4J+hXKbpJytG0N38e+r4CqyR5ilLfJ9hoISHbIw== X-Google-Smtp-Source: AKy350ZZZL8pphDOUectQe/OR6qxHzSfDr7AGLq5vY5gioai9U/NBlK35cUThEdpgdEqCtzjJsZJCA== X-Received: by 2002:a05:6402:d3:b0:4fa:e1fd:5a30 with SMTP id i19-20020a05640200d300b004fae1fd5a30mr12303438edu.19.1679929628405; Mon, 27 Mar 2023 08:07:08 -0700 (PDT) Received: from alco.roam.corp.google.com ([2620:0:1059:10:ed3c:5e9e:b8e4:8695]) by smtp.gmail.com with ESMTPSA id t9-20020a50c249000000b005021d1ae6adsm5312428edf.28.2023.03.27.08.07.07 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 27 Mar 2023 08:07:08 -0700 (PDT) From: Ricardo Ribalda Date: Mon, 27 Mar 2023 17:06:54 +0200 Subject: [PATCH v4 2/2] x86/purgatory: Add linker script MIME-Version: 1.0 Content-Type: text/plain; charset="utf-8" Content-Transfer-Encoding: quoted-printable Message-Id: <20230321-kexec_clang16-v4-2-1340518f98e9@chromium.org> References: <20230321-kexec_clang16-v4-0-1340518f98e9@chromium.org> In-Reply-To: <20230321-kexec_clang16-v4-0-1340518f98e9@chromium.org> To: Eric Biederman Cc: linux-kernel@vger.kernel.org, Baoquan He , stable@vger.kernel.org, Ross Zwisler , Ricardo Ribalda , Philipp Rudo , Steven Rostedt , kexec@lists.infradead.org X-Mailer: b4 0.11.0-dev-696ae X-Developer-Signature: v=1; a=openpgp-sha256; l=4062; i=ribalda@chromium.org; h=from:subject:message-id; bh=qY09zbcWDi4omI4cAAqSkSf1QXILb3VpDDT9kkUrd8k=; b=owEBbQKS/ZANAwAKAdE30T7POsSIAcsmYgBkIbEXTTl0yvDRVdkTXHHm+0bOTv2j/hTT7auw+OrA crD/BLWJAjMEAAEKAB0WIQREDzjr+/4oCDLSsx7RN9E+zzrEiAUCZCGxFwAKCRDRN9E+zzrEiAsbD/ 0UsWhT4KOuvSbykGED1lnG/+pTSa3Xp9DDzRODKaqq2yNEiujiz6N8UcEW7t5GEA1++UUUAZPD8MBd bqegVfBE1QvTudCz7SYGQ34tYg0NRZfYEJRi4GjJ8LWSH3aBVjTdRTOHVf3Ixv5iZXjA5CnD7gij80 CVs0m7tTmWtk/mISLzsXIYvDVvIumbQD9tevfwTFP1gk8TqZk7nE/LFzTyuiDwBzGWQuRFKeBJM7qQ lhCoPJcFrLahBfcmEKsbhcznykvHmhTRHFf5s0uRr7qVWANQd4l+a/2+XOSgEwwheY87nL5H2Z6fXY oc02JXg7tJtKn7W5uqnoyUfJWj5W7QiYwN9KDAdfVBUGaVYwEX75y8EMjdN4vhdgmCuHcMxoC/BQz8 fDl/PO8eCnDXEsg5z+is1bdMXSJ20JCU1GPgldC9eG2QR7kFXgOF5NOLg2ndjXwd5cVDB0aAuzxfAe FTJDe/5ecHdkjIrCSECROJSIAlKKu/5zGsJ0yaTs1aIr02aiU0y2UZQ9HCLdcXHf4erZBypIYNy+QE fOoXFDdNjXCWkQlhBsEsrgIhrSZWbvMjM3KJ9Vvb8q1Er0jFnuvOqclpT0mwW5gLbsvQv2+gPHPHdq M+FO5RVET3Muy4/a+4eTLUi8jn0UyioYEI4LV5esDnAGuRelODSlNgdM6ohQ== X-Developer-Key: i=ribalda@chromium.org; a=openpgp; fpr=9EC3BB66E2FC129A6F90B39556A0D81F9F782DA9 Precedence: bulk List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Make sure that the .text section is not divided in multiple overlapping sections. This is not supported by kexec_file. Signed-off-by: Ricardo Ribalda --- arch/x86/purgatory/.gitignore | 2 ++ arch/x86/purgatory/Makefile | 20 +++++++++---- arch/x86/purgatory/kexec-purgatory.S | 2 +- arch/x86/purgatory/purgatory.lds.S | 57 ++++++++++++++++++++++++++++++++= ++++ 4 files changed, 74 insertions(+), 7 deletions(-) diff --git a/arch/x86/purgatory/.gitignore b/arch/x86/purgatory/.gitignore index d2be1500671d..1fe71fe5945d 100644 --- a/arch/x86/purgatory/.gitignore +++ b/arch/x86/purgatory/.gitignore @@ -1 +1,3 @@ purgatory.chk +purgatory.lds +purgatory diff --git a/arch/x86/purgatory/Makefile b/arch/x86/purgatory/Makefile index 17f09dc26381..4dc96d409bec 100644 --- a/arch/x86/purgatory/Makefile +++ b/arch/x86/purgatory/Makefile @@ -16,10 +16,11 @@ CFLAGS_sha256.o :=3D -D__DISABLE_EXPORTS =20 # When linking purgatory.ro with -r unresolved symbols are not checked, # also link a purgatory.chk binary without -r to check for unresolved symb= ols. -PURGATORY_LDFLAGS :=3D -e purgatory_start -z nodefaultlib -LDFLAGS_purgatory.ro :=3D -r $(PURGATORY_LDFLAGS) -LDFLAGS_purgatory.chk :=3D $(PURGATORY_LDFLAGS) -targets +=3D purgatory.ro purgatory.chk +PURGATORY_LDFLAGS :=3D -nostdlib -z nodefaultlib +LDFLAGS_purgatory :=3D -r $(PURGATORY_LDFLAGS) -T +LDFLAGS_purgatory.chk :=3D -e purgatory_start $(PURGATORY_LDFLAGS) + +targets +=3D purgatory.lds purgatory.ro purgatory.chk =20 # Sanitizer, etc. runtimes are unavailable and cannot be linked here. GCOV_PROFILE :=3D n @@ -72,10 +73,17 @@ CFLAGS_string.o +=3D $(PURGATORY_CFLAGS) AFLAGS_REMOVE_setup-x86_$(BITS).o +=3D -Wa,-gdwarf-2 AFLAGS_REMOVE_entry64.o +=3D -Wa,-gdwarf-2 =20 -$(obj)/purgatory.ro: $(PURGATORY_OBJS) FORCE +OBJCOPYFLAGS_purgatory.ro :=3D -O elf64-x86-64 +OBJCOPYFLAGS_purgatory.ro +=3D --remove-section=3D'*debug*' +OBJCOPYFLAGS_purgatory.ro +=3D --remove-section=3D'.comment' +OBJCOPYFLAGS_purgatory.ro +=3D --remove-section=3D'.note.*' +$(obj)/purgatory.ro: $(obj)/purgatory FORCE + $(call if_changed,objcopy) + +$(obj)/purgatory.chk: $(obj)/purgatory FORCE $(call if_changed,ld) =20 -$(obj)/purgatory.chk: $(obj)/purgatory.ro FORCE +$(obj)/purgatory: $(obj)/purgatory.lds $(PURGATORY_OBJS) FORCE $(call if_changed,ld) =20 $(obj)/kexec-purgatory.o: $(obj)/purgatory.ro $(obj)/purgatory.chk diff --git a/arch/x86/purgatory/kexec-purgatory.S b/arch/x86/purgatory/kexe= c-purgatory.S index 8530fe93b718..54b0d0b4dc42 100644 --- a/arch/x86/purgatory/kexec-purgatory.S +++ b/arch/x86/purgatory/kexec-purgatory.S @@ -5,7 +5,7 @@ .align 8 kexec_purgatory: .globl kexec_purgatory - .incbin "arch/x86/purgatory/purgatory.ro" + .incbin "arch/x86/purgatory/purgatory" .Lkexec_purgatory_end: =20 .align 8 diff --git a/arch/x86/purgatory/purgatory.lds.S b/arch/x86/purgatory/purgat= ory.lds.S new file mode 100644 index 000000000000..610da88aafa0 --- /dev/null +++ b/arch/x86/purgatory/purgatory.lds.S @@ -0,0 +1,57 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +#include + +OUTPUT_FORMAT(CONFIG_OUTPUT_FORMAT) + +#undef i386 + +#include +#include + +ENTRY(purgatory_start) + +SECTIONS +{ + . =3D 0; + .head.text : { + _head =3D . ; + HEAD_TEXT + _ehead =3D . ; + } + .rodata : { + _rodata =3D . ; + *(.rodata) /* read-only data */ + *(.rodata.*) + _erodata =3D . ; + } + .text : { + _text =3D .; /* Text */ + *(.text) + *(.text.*) + *(.noinstr.text) + _etext =3D . ; + } + .data : { + _data =3D . ; + *(.data) + *(.data.*) + *(.bss.efistub) + _edata =3D . ; + } + . =3D ALIGN(L1_CACHE_BYTES); + .bss : { + _bss =3D . ; + *(.bss) + *(.bss.*) + *(COMMON) + . =3D ALIGN(8); /* For convenience during zeroing */ + _ebss =3D .; + } + + /* Sections to be discarded */ + /DISCARD/ : { + *(.eh_frame) + *(*__ksymtab*) + *(___kcrctab*) + } +} --=20 2.40.0.348.gf938b09366-goog-b4-0.11.0-dev-696ae