backport upstream patches
Signed-off-by: Zhipeng Xie <xiezhipeng1@huawei.com>
This commit is contained in:
Zhipeng Xie
parent
fe32fa0be2
commit
dcbfd17440
51
0041-kpatch-cc-Add-more-file-ignores.patch
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51
0041-kpatch-cc-Add-more-file-ignores.patch
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From 846ea81bd9fd673ccbcb64c9e2732422fbd02798 Mon Sep 17 00:00:00 2001
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From: Josh Poimboeuf <jpoimboe@redhat.com>
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Date: Wed, 17 Aug 2022 12:10:39 -0700
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Subject: [PATCH 1/3] kpatch-cc: Add more file ignores
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These files aren't in the kernel proper, and can be ignored.
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Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
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---
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kpatch-build/kpatch-cc | 18 +++++++++---------
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1 file changed, 9 insertions(+), 9 deletions(-)
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diff --git a/kpatch-build/kpatch-cc b/kpatch-build/kpatch-cc
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index 5e241dd..b9c511a 100755
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--- a/kpatch-build/kpatch-cc
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+++ b/kpatch-build/kpatch-cc
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@@ -35,22 +35,22 @@ if [[ "$TOOLCHAINCMD" =~ ^(.*-)?gcc$ ||
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vmlinux.o|\
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.tmp_kallsyms1.o|\
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.tmp_kallsyms2.o|\
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- init/version.o|\
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- arch/x86/boot/version.o|\
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- arch/x86/boot/compressed/eboot.o|\
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- arch/x86/boot/header.o|\
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- arch/x86/boot/compressed/efi_stub_64.o|\
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- arch/x86/boot/compressed/piggy.o|\
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- kernel/system_certificates.o|\
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- arch/x86/vdso/*|\
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+ arch/x86/boot/*|\
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arch/x86/entry/vdso/*|\
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- drivers/firmware/efi/libstub/*|\
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+ arch/x86/purgatory/*|\
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+ arch/x86/realmode/*|\
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+ arch/x86/tools/*|\
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+ arch/x86/vdso/*|\
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arch/powerpc/kernel/prom_init.o|\
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arch/powerpc/kernel/vdso64/*|\
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arch/s390/boot/*|\
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arch/s390/purgatory/*|\
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arch/s390/kernel/vdso64/*|\
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+ drivers/firmware/efi/libstub/*|\
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+ init/version.o|\
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+ kernel/system_certificates.o|\
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lib/*|\
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+ tools/*|\
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.*.o|\
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*/.lib_exports.o)
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break
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--
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2.27.0
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@ -0,0 +1,69 @@
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From 000f03dbeefddbf6c9f9336d4e043809eae6a7a2 Mon Sep 17 00:00:00 2001
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From: Josh Poimboeuf <jpoimboe@redhat.com>
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Date: Mon, 21 Nov 2022 19:32:18 -0800
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Subject: [PATCH 2/3] create-diff-object: fix __UNIQUE_ID() variable
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correlation
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kpatch_mangled_strcmp() only ignores the digits after the period, but in
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the case of __UNIQUE_ID(), the symbol names have random digits before
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the period due to the use of `__COUNTER__`. Make sure such symbols are
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properly correlated.
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Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
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---
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kpatch-build/create-diff-object.c | 32 +++++++++++++++++++++++++++++++
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1 file changed, 32 insertions(+)
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diff --git a/kpatch-build/create-diff-object.c b/kpatch-build/create-diff-object.c
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index 5d34717..8a671bd 100644
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--- a/kpatch-build/create-diff-object.c
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+++ b/kpatch-build/create-diff-object.c
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@@ -399,6 +399,35 @@ static bool has_digit_tail(char *tail)
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return false;
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}
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+/*
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+ * Hack for __UNIQUE_ID(). The following should match:
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+ *
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+ * __UNIQUE_ID_ddebug1131.186
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+ * __UNIQUE_ID_ddebug1132.187
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+ */
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+static int __kpatch_unique_id_strcmp(char *s1, char *s2)
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+{
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+ /* match '__UNIQUE_ID_ddebug' */
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+ while (*s1 == *s2) {
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+ if (!*s1)
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+ return 0;
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+ s1++;
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+ s2++;
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+ }
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+
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+ /* skip digits before '.' or EOL */
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+ while (isdigit(*s1))
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+ s1++;
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+ while (isdigit(*s2))
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+ s2++;
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+
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+ if ((!*s1 || has_digit_tail(s1)) &&
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+ (!*s2 || has_digit_tail(s2)))
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+ return 0;
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+
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+ return 1;
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+}
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+
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/*
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* This is like strcmp, but for gcc-mangled symbols. It skips the comparison
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* of any substring which consists of '.' followed by any number of digits.
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@@ -412,6 +441,9 @@ static int kpatch_mangled_strcmp(char *s1, char *s2)
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if (strstr(s1, ".str1."))
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return strcmp(s1, s2);
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+ if (!strncmp(s1, "__UNIQUE_ID_", 12))
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+ return __kpatch_unique_id_strcmp(s1, s2);
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+
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while (*s1 == *s2) {
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if (!*s1)
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return 0;
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--
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2.27.0
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@ -0,0 +1,40 @@
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From b232188e0c220f779ce54955876b56a4161c258a Mon Sep 17 00:00:00 2001
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From: Joe Lawrence <joe.lawrence@redhat.com>
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Date: Fri, 10 Feb 2023 13:38:05 -0500
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Subject: [PATCH 3/3] create-diff-object: ignore __patchable_function_entries
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Kernel v6.2+ commit bea75b33895f ("x86/Kconfig: Introduce function
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padding") introduces the -fpatchable-function-entry=16,16 build flag on
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x86. This leverages compiler support for generating a
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__patchable_function_entries section similar to __mcount_loc.
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That said, x86 still utilizes __mcount_loc even when
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__patchable_function_entries exists. The latter point to the __pfx
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symbols, but the section is discarded in the vmlinux link and isn't used
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regardless, for ftrace or for any other purpose.
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Signed-off-by: Joe Lawrence <joe.lawrence@redhat.com>
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---
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kpatch-build/create-diff-object.c | 6 ++++++
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1 file changed, 6 insertions(+)
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diff --git a/kpatch-build/create-diff-object.c b/kpatch-build/create-diff-object.c
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index 8a671bd..0e91513 100644
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--- a/kpatch-build/create-diff-object.c
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+++ b/kpatch-build/create-diff-object.c
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@@ -2885,6 +2885,12 @@ static void kpatch_mark_ignored_sections(struct kpatch_elf *kelf)
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!strncmp(sec->name, ".llvm_addrsig", 13) ||
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!strncmp(sec->name, ".llvm.", 6))
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sec->ignore = 1;
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+
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+ if (kelf->arch == X86_64) {
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+ if (!strcmp(sec->name, ".rela__patchable_function_entries") ||
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+ !strcmp(sec->name, "__patchable_function_entries"))
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+ sec->ignore = 1;
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+ }
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}
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sec = find_section_by_name(&kelf->sections, ".kpatch.ignore.sections");
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--
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2.27.0
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11
kpatch.spec
11
kpatch.spec
@ -1,7 +1,7 @@
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Name: kpatch
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Epoch: 1
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Version: 0.9.7
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Release: 2
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Release: 3
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Summary: A Linux dynamic kernel patching infrastructure
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License: GPLv2
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@ -53,6 +53,9 @@ Patch0037:0037-create-diff-object-ignore-entsize-change-of-.return_.patch
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Patch0038:0038-kpatch-build-for-clang-use-.strtab-if-no-.shstrtab.patch
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Patch0039:0039-create-diff-object-ignore-clang-s-.llvm_addrsig-sect.patch
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Patch0040:0040-create-diff-object-ignore-.llvm.-sections.patch
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Patch0041:0041-kpatch-cc-Add-more-file-ignores.patch
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Patch0042:0042-create-diff-object-fix-__UNIQUE_ID-variable-correlat.patch
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Patch0043:0043-create-diff-object-ignore-__patchable_function_entri.patch
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BuildRequires: gcc elfutils-libelf-devel kernel-devel git
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Requires: bc make gcc patch bison flex openssl-devel
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@ -113,6 +116,12 @@ popd
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%{_mandir}/man1/*.1.gz
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%changelog
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* Sat Jul 29 2023 Zhipeng Xie <xiezhipeng1@huawei.com> -1:0.9.7-3
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- Type:enhancement
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- ID:NA
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- SUG:NA
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- DESC:backport upsteam patches
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* Mon May 29 2023 Zhipeng Xie <xiezhipeng1@huawei.com> -1:0.9.7-2
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- Type:enhancement
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- ID:NA
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