linux-kernel - [PATCH v3 2/4] scripts/mksysmap: Factor out sed ignored symbols expression into script

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Date:   Fri, 28 Jul 2023 12:34:13 +0100
From:   Will Deacon <will@...nel.org>
To:     linux-kernel@...r.kernel.org
Cc:     kernel-team@...roid.com, Will Deacon <will@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Nathan Chancellor <nathan@...nel.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Nicolas Schier <nicolas@...sle.eu>,
        Josh Poimboeuf <jpoimboe@...nel.org>,
        John Stultz <jstultz@...gle.com>, linux-kbuild@...r.kernel.org
Subject: [PATCH v3 2/4] scripts/mksysmap: Factor out sed ignored symbols expression into script

To prepare for 'faddr2line' reusing the same ignored symbols list as
'mksysmap', factor out the relevant sed expression into its own script,
removing the double-escapes for '$' symbols as they are no longer
required.

Cc: Masahiro Yamada <masahiroy@...nel.org>
Cc: Nathan Chancellor <nathan@...nel.org>
Cc: Nick Desaulniers <ndesaulniers@...gle.com>
Cc: Nicolas Schier <nicolas@...sle.eu>
Cc: Josh Poimboeuf <jpoimboe@...nel.org>
Cc: John Stultz <jstultz@...gle.com>
Cc: linux-kbuild@...r.kernel.org
Signed-off-by: Will Deacon <will@...nel.org>
---
 scripts/mksysmap                | 77 +--------------------------------
 scripts/sysmap-ignored-syms.sed | 74 +++++++++++++++++++++++++++++++
 2 files changed, 75 insertions(+), 76 deletions(-)
 create mode 100644 scripts/sysmap-ignored-syms.sed

diff --git a/scripts/mksysmap b/scripts/mksysmap
index 9ba1c9da0a40..a98b34363258 100755
--- a/scripts/mksysmap
+++ b/scripts/mksysmap
@@ -16,7 +16,7 @@
 # 'W' or 'w'.
 #
 
-${NM} -n ${1} | sed >${2} -e "
+${NM} -n ${1} | sed >${2} -f $(dirname $0)/sysmap-ignored-syms.sed -e "
 # ---------------------------------------------------------------------------
 # Ignored symbol types
 #
@@ -27,81 +27,6 @@ ${NM} -n ${1} | sed >${2} -e "
 # w: local weak symbols
 / [aNUw] /d
 
-# ---------------------------------------------------------------------------
-# Ignored prefixes
-#  (do not forget a space before each pattern)
-
-# local symbols for ARM, MIPS, etc.
-/ \\$/d
-
-# local labels, .LBB, .Ltmpxxx, .L__unnamed_xx, .LASANPC, etc.
-/ \.L/d
-
-# arm64 EFI stub namespace
-/ __efistub_/d
-
-# arm64 local symbols in PIE namespace
-/ __pi_\\$/d
-/ __pi_\.L/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
-/ __kvm_nvhe___kcfi_typeid_/d
-/ __pi___kcfi_typeid_/d
-
-# CRC from modversions
-/ __crc_/d
-
-# EXPORT_SYMBOL (symbol name)
-/ __kstrtab_/d
-
-# 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 '$' after each pattern)
-
-# for LoongArch?
-/ L0$/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
 #
diff --git a/scripts/sysmap-ignored-syms.sed b/scripts/sysmap-ignored-syms.sed
new file mode 100644
index 000000000000..14b9eb2c9ed9
--- /dev/null
+++ b/scripts/sysmap-ignored-syms.sed
@@ -0,0 +1,74 @@
+# ---------------------------------------------------------------------------
+# Ignored prefixes
+#  (do not forget a space before each pattern)
+
+# local symbols for ARM, MIPS, etc.
+/ \$/d
+
+# local labels, .LBB, .Ltmpxxx, .L__unnamed_xx, .LASANPC, etc.
+/ \.L/d
+
+# arm64 EFI stub namespace
+/ __efistub_/d
+
+# arm64 local symbols in PIE namespace
+/ __pi_\$/d
+/ __pi_\.L/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
+/ __kvm_nvhe___kcfi_typeid_/d
+/ __pi___kcfi_typeid_/d
+
+# CRC from modversions
+/ __crc_/d
+
+# EXPORT_SYMBOL (symbol name)
+/ __kstrtab_/d
+
+# 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 '$' after each pattern)
+
+# for LoongArch?
+/ L0$/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
-- 
2.41.0.487.g6d72f3e995-goog