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scripts/kallsyms: move compiler-generated symbol patterns to mksysmap

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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 c17a253870 ("mksysmap: Fix
the mismatch of 'L0' symbols in System.map").

They were separately maintained prior to commit 94ff2f63d6 ("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@kernel.org>
Reviewed-by: Nick Desaulniers <ndesaulniers@google.com>
This commit is contained in:
Masahiro Yamada 2023-03-08 20:52:40 +09:00
parent ca09bf48f9
commit 320e7c9d44
2 changed files with 43 additions and 60 deletions
repo.diff.show_diff_stats Download patch file Download diff file Expand all files Collapse all files

60
scripts/kallsyms.c
View file

@ -102,66 +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[] = {
/* Exclude linker generated symbols which vary between passes */
"_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;

43
scripts/mksysmap
View file

@ -37,6 +37,28 @@ ${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
@ -46,6 +68,15 @@ ${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)
@ -53,6 +84,18 @@ ${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
#