Changes in mksysmap

7a6c355b - scripts/mksysmap: Fix escape chars '$'

Mon, 23 Dec 2024 12:44:53 +0000

scripts/mksysmap: Fix escape chars '$'Commit b18b047002b7 ("kbuild: change scripts/mksysmap into sed script")changed the invocation of the script, to call sed directly withoutshell.That means, the current extra escape that was added in:commit ec336aa83162 ("scripts/mksysmap: Fix badly escaped '$'")for the shell is not correct any more, at the moment the stack tracesfor nvhe are corrupted:[ 22.840904] kvm [190]: [] __kvm_nvhe_$x.220+0x58/0x9c[ 22.842913] kvm [190]: [] __kvm_nvhe_$x.9+0x44/0x50[ 22.844112] kvm [190]: [] __kvm_nvhe___skip_pauth_save+0x4/0x4With this patch:[ 25.793513] kvm [192]: nVHE call trace:[ 25.794141] kvm [192]: [] __kvm_nvhe_hyp_panic+0xb0/0xf4[ 25.796590] kvm [192]: [] __kvm_nvhe_handle_trap+0xe4/0x188[ 25.797553] kvm [192]: [] __kvm_nvhe___skip_pauth_save+0x4/0x4Fixes: b18b047002b7 ("kbuild: change scripts/mksysmap into sed script")Signed-off-by: Mostafa Saleh Reviewed-by: Nathan Chancellor Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

b18b0470 - kbuild: change scripts/mksysmap into sed script

Mon, 20 May 2024 12:42:10 +0000

kbuild: change scripts/mksysmap into sed scriptThe previous commit removed the subshell execution from scripts/mksysmap,which is now simple enough to become a sed script.Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

04b8cb09 - kbuild: avoid unneeded kallsyms step 3

Mon, 20 May 2024 12:42:09 +0000

kbuild: avoid unneeded kallsyms step 3Since commit 951bcae6c5a0 ("kallsyms: Avoid weak references for kallsymssymbols"), the kallsyms step 3 always occurs.You can compare the build logs.[Before 951bcae6c5a0] $ git checkout 951bcae6c5a0^ $ make defconfig all [ snip ] LD .tmp_vmlinux.kallsyms1 NM .tmp_vmlinux.kallsyms1.syms KSYMS .tmp_vmlinux.kallsyms1.S AS .tmp_vmlinux.kallsyms1.S LD .tmp_vmlinux.kallsyms2 NM .tmp_vmlinux.kallsyms2.syms KSYMS .tmp_vmlinux.kallsyms2.S AS .tmp_vmlinux.kallsyms2.S LD vmlinux[After 951bcae6c5a0] $ git checkout 951bcae6c5a0 $ make defconfig all [ snip ] LD .tmp_vmlinux.kallsyms1 NM .tmp_vmlinux.kallsyms1.syms KSYMS .tmp_vmlinux.kallsyms1.S AS .tmp_vmlinux.kallsyms1.S LD .tmp_vmlinux.kallsyms2 NM .tmp_vmlinux.kallsyms2.syms KSYMS .tmp_vmlinux.kallsyms2.S AS .tmp_vmlinux.kallsyms2.S LD .tmp_vmlinux.kallsyms3 # should not happen NM .tmp_vmlinux.kallsyms3.syms # should not happen KSYMS .tmp_vmlinux.kallsyms3.S # should not happen AS .tmp_vmlinux.kallsyms3.S # should not happen LD vmlinuxThe resulting vmlinux is correct, but it always requires an additionallinking step.The symbols produced by kallsyms are excluded from kallsyms itselfbecause they were previously missing in step 1. With those symbolsexcluded, the symbol lists matched between step 1 and step 2,eliminating the need for step 3. Now, this has a negative effect.Since 951bcae6c5a0, the PROVIDE() directives provide the fallbackdefinitions, which are not trimmed from the sysbol list in step 1because ${kallsymso_prev} is empty at this point.In step 2, ${kallsymso_prev} is set, and the kallsyms_* symbols aretrimmed from the symbol list.Due to the table size difference between step 1 and step 2 (the formeris larger due to the presence of kallsyms_*), step 3 is triggered.Now that the kallsyms_* symbols are always linked, let's stop omittingthem from kallsyms. This avoids unnecessary step 3.Fixes: 951bcae6c5a0 ("kallsyms: Avoid weak references for kallsyms symbols")Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

a951884d - kallsyms: ignore ARMv4 thunks along with others

Thu, 15 Feb 2024 08:32:08 +0000

kallsyms: ignore ARMv4 thunks along with otherslld is now able to build ARMv4 and ARMv4T kernels, which means it cangenerate thunks for those (__ARMv4PILongThunk_*, __ARMv4PILongBXThunk_*)that can interfere with kallsyms table generation since they do not getignore like the corresponding ARMv5+ ones are:Inconsistent kallsyms dataTry "make KALLSYMS_EXTRA_PASS=1" as a workaroundReplace the hardcoded list of thunk symbols with a more general regex thatcovers this one along with future symbols that follow the same pattern.Fixes: 5eb6e280432d ("ARM: 9289/1: Allow pre-ARMv5 builds with ld.lld 16.0.0 and newer")Fixes: efe6e3068067 ("kallsyms: fix nonconverging kallsyms table with lld")Suggested-by: Masahiro Yamada Signed-off-by: Arnd Bergmann Reviewed-by: Ard Biesheuvel Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

71025b85 - scripts/mksysmap: Ignore prefixed KCFI symbols

Mon, 26 Jun 2023 12:29:46 +0000

scripts/mksysmap: Ignore prefixed KCFI symbolsThe (relatively) new KCFI feature in LLVM/Clang encodes type informationfor C functions by generating symbols named __kcfi_typeid_, whichcan then be referenced from assembly. However, some custom build rules(e.g. nVHE or early PIE on arm64) use objcopy to add a prefix to all thesymbols in their object files, making mksysmap's ignore filter missthose KCFI symbols.Therefore, explicitly list those twice-prefixed KCFI symbols as ignored.Alternatively, this could also be achieved in a less verbose way byignoring any symbol containing the string "__kcfi_typeid_". However,listing the combined prefixes explicitly saves us from running the smallrisk of ignoring symbols that should be kept.Signed-off-by: Pierre-Clément Tosi Reviewed-by: Sami Tolvanen Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

200dd957 - scripts/mksysmap: Ignore __pi_ local arm64 symbols

Tue, 06 Jun 2023 18:19:36 +0000

scripts/mksysmap: Ignore __pi_ local arm64 symbolsSimilarly to "__kvm_nvhe_", filter out any local symbol that wasprefixed with "__pi_" (generated when CONFIG_RANDOMIZE_BASE=y) whencompiling System.map and in kallsyms.Signed-off-by: Pierre-Clément Tosi Acked-by: Ard Biesheuvel Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

ec336aa8 - scripts/mksysmap: Fix badly escaped '$'

Tue, 06 Jun 2023 17:35:53 +0000

scripts/mksysmap: Fix badly escaped '$'The backslash characters escaping '$' in the command to sed (intended toprevent it from interpreting '$' as "end-of-line") are currently beingconsumed by the Shell (where they mean that sh should not evaluate whatfollows '$' as a variable name). This means that sed -e "/ \$/d"executes the script / $/dinstead of the intended / \$/dSo escape twice in mksysmap any '$' that actually needs to reach sedescaped so that the backslash survives the Shell.Fixes: c4802044a0a7 ("scripts/mksysmap: use sed with in-line comments")Fixes: 320e7c9d4494 ("scripts/kallsyms: move compiler-generated symbol patterns to mksysmap")Signed-off-by: Pierre-Clément Tosi Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

320e7c9d - scripts/kallsyms: move compiler-generated symbol patterns to mksysmap

Wed, 08 Mar 2023 11:52:40 +0000

scripts/kallsyms: move compiler-generated symbol patterns to mksysmapscripts/kallsyms.c maintains compiler-generated symbols, but we end upwith something similar in scripts/mksysmap to avoid the "Inconsistentkallsyms data" error. For example, commit c17a2538704f ("mksysmap: Fixthe 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 Reviewed-by: Nick Desaulniers List of files: /linux-6.15/scripts/mksysmap

ca09bf48 - scripts/kallsyms: exclude symbols generated by itself dynamically

Wed, 08 Mar 2023 11:52:39 +0000

scripts/kallsyms: exclude symbols generated by itself dynamicallyDrop the symbols generated by scripts/kallsyms itself automaticallyinstead of maintaining the symbol list manually.Pass the kallsyms object from the previous kallsyms step (if it exists)as the third parameter of scripts/mksysmap, which will weed out thegenerated symbols from the input to the next kallsyms step.Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

c4802044 - scripts/mksysmap: use sed with in-line comments

Wed, 08 Mar 2023 11:52:38 +0000

scripts/mksysmap: use sed with in-line commentsIt is not feasible to insert comments in a multi-line shell command.Use sed, and move comments close to the code.Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

e9f76363 - scripts/mksysmap: remove comments described in nm(1)

Wed, 08 Mar 2023 11:52:37 +0000

scripts/mksysmap: remove comments described in nm(1)I do not think we need to repeat what is written in 'man nm'.Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

d32b55f4 - kallsyms: ignore __kstrtab_* and __kstrtabns_* symbols

Mon, 26 Sep 2022 09:02:29 +0000

kallsyms: ignore __kstrtab_* and __kstrtabns_* symbolsEvery EXPORT_SYMBOL creates __kstrtab_* and __kstrtabns_*, whichconsumes 15-20% of the kallsyms entries.For example, on the system built from the x86_64 defconfig, $ cat /proc/kallsyms | wc 129527 388581 5685465 $ cat /proc/kallsyms | grep __kstrtab | wc 23489 70467 1187932We already ignore __crc_* symbols populated by EXPORT_SYMBOL, so itshould be fine to ignore __kstrtab_* and __kstrtabns_* as well.This makes vmlinux a bit smaller. $ size vmlinux.before vmlinux.after text data bss dec hex filename 22785374 8559694 1413328 32758396 1f3da7c vmlinux.before 22785374 8137806 1413328 32336508 1ed6a7c vmlinux.afterSigned-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

a2833d1b - kallsyms: drop duplicated ignore patterns from kallsyms.c

Mon, 26 Sep 2022 09:02:27 +0000

kallsyms: drop duplicated ignore patterns from kallsyms.cNow that kallsyms.c parses the output from mksysmap, some symbols havealready been dropped.Move comments to scripts/mksysmap. Also, make the grep command readable.Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

c1346169 - mksysmap: update comment about __crc_*

Mon, 26 Sep 2022 09:02:25 +0000

mksysmap: update comment about __crc_*Since commit 7b4537199a4a ("kbuild: link symbol CRCs at final link,removing CONFIG_MODULE_REL_CRCS"), __crc_* symbols never becomeabsolute.Keep ignoring __crc_*, but update the comment.Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

c17a2538 - mksysmap: Fix the mismatch of 'L0' symbols in System.map

Thu, 01 Sep 2022 11:10:59 +0000

mksysmap: Fix the mismatch of 'L0' symbols in System.mapWhen System.map was generated, the kernel used mksysmap to filter thekernel symbols, we need to filter "L0" symbols in LoongArch architecture.$ cat System.map | grep L09000000000221540 t L0The L0 symbol exists in System.map, but not in .tmp_System.map. When"cmp -s System.map .tmp_System.map" will show "Inconsistent kallsymsdata" error message in link-vmlinux.sh script.Signed-off-by: Youling Tang Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

72d24acc - mksysmap: Fix the mismatch of '.L' symbols in System.map

Tue, 02 Jun 2020 07:45:17 +0000

mksysmap: Fix the mismatch of '.L' symbols in System.mapWhen System.map was generated, the kernel used mksysmap tofilter the kernel symbols, but all the symbols with thesecond letter 'L' in the kernel were filtered out, not justthe symbols starting with 'dot + L'.For example:ashimida@ubuntu:~/linux$ cat System.map |grep ' .L'ashimida@ubuntu:~/linux$ nm -n vmlinux |grep ' .L'ffff0000088028e0 t bLength_show......ffff0000092e0408 b PLLP_OUTC_lockffff0000092e0410 b PLLP_OUTA_lockThe original intent should be to filter out all local symbolsstarting with '.L', so the dot should be escaped.Fixes: 00902e984732 ("mksysmap: Add h8300 local symbol pattern")Signed-off-by: ashimida Signed-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

00902e98 - mksysmap: Add h8300 local symbol pattern

Mon, 09 Mar 2015 06:30:48 +0000

mksysmap: Add h8300 local symbol patternh8300's nm output have a lot of local symbols.ex)00000000 N .Lframe000000013 N .LLST100000026 N .LLST200000039 N .LLST30000004c N .LLST4Added new pattern " .L" to filter rule.Signed-off-by: Yoshinori Sato List of files: /linux-6.15/scripts/mksysmap

06ed5c2b - kbuild: Make scripts executable

Wed, 20 Aug 2014 14:02:59 +0000

kbuild: Make scripts executableThe Makefiles call the respective interpreter explicitly, but this makesit easier to use the scripts manually.Signed-off-by: Michal Marek List of files: /linux-6.15/scripts/mksysmap

7eb6e340 - kbuild: trivial - remove trailing empty lines

Thu, 29 May 2014 05:12:29 +0000

kbuild: trivial - remove trailing empty linesSigned-off-by: Masahiro Yamada List of files: /linux-6.15/scripts/mksysmap

4fec5420 - trivial: typo in comment in mksysmap

Fri, 13 Jul 2012 16:38:57 +0000

trivial: typo in comment in mksysmapSigned-off-by: Masatake YAMATO Signed-off-by: Jiri Kosina List of files: /linux-6.15/scripts/mksysmap