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Merge tag 'objtool_urgent_for_v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

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Pull objtool fix from Borislav Petkov:

 - Add a ORC format hash to vmlinux and modules in order for other tools
   which use it, to detect changes to it and adapt accordingly

* tag 'objtool_urgent_for_v6.4' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip:
  x86/unwind/orc: Add ELF section with ORC version identifier
This commit is contained in:
Linus Torvalds
2023-06-25 10:00:17 -07:00
parent 661e723b6f b9f174c811
commit 300edd751b
7 changed files with 59 additions and 0 deletions
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5
scripts/mod/modpost.c
View File

@@ -1979,6 +1979,11 @@ static void add_header(struct buffer *b, struct module *mod)
buf_printf(b, "#include <linux/vermagic.h>\n");
buf_printf(b, "#include <linux/compiler.h>\n");
buf_printf(b, "\n");
buf_printf(b, "#ifdef CONFIG_UNWINDER_ORC\n");
buf_printf(b, "#include <asm/orc_header.h>\n");
buf_printf(b, "ORC_HEADER;\n");
buf_printf(b, "#endif\n");
buf_printf(b, "\n");
buf_printf(b, "BUILD_SALT;\n");
buf_printf(b, "BUILD_LTO_INFO;\n");
buf_printf(b, "\n");

16
scripts/orc_hash.sh Normal file
View File

@@ -0,0 +1,16 @@
#!/bin/sh
# SPDX-License-Identifier: GPL-2.0-or-later
# Copyright (c) Meta Platforms, Inc. and affiliates.
set -e
printf '%s' '#define ORC_HASH '
awk '
/^#define ORC_(REG|TYPE)_/ { print }
/^struct orc_entry {$/ { p=1 }
p { print }
/^}/ { p=0 }' |
sha1sum |
cut -d " " -f 1 |
sed 's/\([0-9a-f]\{2\}\)/0x\1,/g'