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Date: Wed, 8 Mar 2023 20:52:40 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: linux-kbuild@...r.kernel.org
Cc: linux-kernel@...r.kernel.org,
Zhen Lei <thunder.leizhen@...wei.com>,
Arnd Bergmann <arnd@...db.de>,
Masahiro Yamada <masahiroy@...nel.org>,
Nathan Chancellor <nathan@...nel.org>,
Nick Desaulniers <ndesaulniers@...gle.com>,
Nicolas Schier <nicolas@...sle.eu>
Subject: [PATCH 5/8] scripts/kallsyms: move compiler-generated symbol patterns to mksysmap
scripts/kallsyms.c maintains compiler-generated symbols, but we end up
with something similar in scripts/mksysmap to avoid the "Inconsistent
kallsyms data" error. For example, commit c17a2538704f ("mksysmap: Fix
the mismatch of 'L0' symbols in System.map").
They were separately maintained prior to commit 94ff2f63d6a3 ("kbuild:
reuse mksysmap output for kallsyms").
Now that scripts/kallsyms.c parses the output of scripts/mksysmap,
it makes more sense to collect all the ignored patterns to mksysmap.
Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
---
scripts/kallsyms.c | 59 ----------------------------------------------
scripts/mksysmap | 43 +++++++++++++++++++++++++++++++++
2 files changed, 43 insertions(+), 59 deletions(-)
diff --git a/scripts/kallsyms.c b/scripts/kallsyms.c
index e572fda6fe42..97d514c0fc8f 100644
--- a/scripts/kallsyms.c
+++ b/scripts/kallsyms.c
@@ -102,65 +102,6 @@ static char *sym_name(const struct sym_entry *s)
static bool is_ignored_symbol(const char *name, char type)
{
- /* Symbol names that exactly match to the following are ignored.*/
- static const char * const ignored_symbols[] = {
- "_SDA_BASE_", /* ppc */
- "_SDA2_BASE_", /* ppc */
- NULL
- };
-
- /* Symbol names that begin with the following are ignored.*/
- static const char * const ignored_prefixes[] = {
- "__efistub_", /* arm64 EFI stub namespace */
- "__kvm_nvhe_$", /* arm64 local symbols in non-VHE KVM namespace */
- "__kvm_nvhe_.L", /* arm64 local symbols in non-VHE KVM namespace */
- "__AArch64ADRPThunk_", /* arm64 lld */
- "__ARMV5PILongThunk_", /* arm lld */
- "__ARMV7PILongThunk_",
- "__ThumbV7PILongThunk_",
- "__LA25Thunk_", /* mips lld */
- "__microLA25Thunk_",
- "__kcfi_typeid_", /* CFI type identifiers */
- NULL
- };
-
- /* Symbol names that end with the following are ignored.*/
- static const char * const ignored_suffixes[] = {
- "_from_arm", /* arm */
- "_from_thumb", /* arm */
- "_veneer", /* arm */
- NULL
- };
-
- /* Symbol names that contain the following are ignored.*/
- static const char * const ignored_matches[] = {
- ".long_branch.", /* ppc stub */
- ".plt_branch.", /* ppc stub */
- NULL
- };
-
- const char * const *p;
-
- for (p = ignored_symbols; *p; p++)
- if (!strcmp(name, *p))
- return true;
-
- for (p = ignored_prefixes; *p; p++)
- if (!strncmp(name, *p, strlen(*p)))
- return true;
-
- for (p = ignored_suffixes; *p; p++) {
- int l = strlen(name) - strlen(*p);
-
- if (l >= 0 && !strcmp(name + l, *p))
- return true;
- }
-
- for (p = ignored_matches; *p; p++) {
- if (strstr(name, *p))
- return true;
- }
-
if (type == 'u' || type == 'n')
return true;
diff --git a/scripts/mksysmap b/scripts/mksysmap
index 1efd61ee0bac..d8ad6ff69320 100755
--- a/scripts/mksysmap
+++ b/scripts/mksysmap
@@ -36,6 +36,28 @@ ${NM} -n ${1} | sed >${2} -e "
# local labels, .LBB, .Ltmpxxx, .L__unnamed_xx, .LASANPC, etc.
/ \.L/d
+# arm64 EFI stub namespace
+/ __efistub_/d
+
+# arm64 local symbols in non-VHE KVM namespace
+/ __kvm_nvhe_\$/d
+/ __kvm_nvhe_\.L/d
+
+# arm64 lld
+/ __AArch64ADRPThunk_/d
+
+# arm lld
+/ __ARMV5PILongThunk_/d
+/ __ARMV7PILongThunk_/d
+/ __ThumbV7PILongThunk_/d
+
+# mips lld
+/ __LA25Thunk_/d
+/ __microLA25Thunk_/d
+
+# CFI type identifiers
+/ __kcfi_typeid_/d
+
# CRC from modversions
/ __crc_/d
@@ -45,6 +67,15 @@ ${NM} -n ${1} | sed >${2} -e "
# EXPORT_SYMBOL (namespace)
/ __kstrtabns_/d
+# ---------------------------------------------------------------------------
+# Ignored suffixes
+# (do not forget '$' after each pattern)
+
+# arm
+/_from_arm$/d
+/_from_thumb$/d
+/_veneer$/d
+
# ---------------------------------------------------------------------------
# Ignored symbols (exact match)
# (do not forget a space before and '$' after each pattern)
@@ -52,6 +83,18 @@ ${NM} -n ${1} | sed >${2} -e "
# for LoongArch?
/ L0$/d
+# ppc
+/ _SDA_BASE_$/d
+/ _SDA2_BASE_$/d
+
+# ---------------------------------------------------------------------------
+# Ignored patterns
+# (symbols that contain the pattern are ignored)
+
+# ppc stub
+/\.long_branch\./d
+/\.plt_branch\./d
+
# ---------------------------------------------------------------------------
# Ignored kallsyms symbols
#
--
2.34.1
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