user/sven/linux.git/scripts/kallsyms.c, branch v5.3.1

kallsyms: exclude kasan local symbols on s390

2019-07-07T17:25:59Z

gcc asan instrumentation emits the following sequence to store frame pc when the kernel is built with CONFIG_RELOCATABLE: debug/vsprintf.s: .section .data.rel.ro.local,"aw" .align 8 .LC3: .quad .LASANPC4826@GOTOFF .text .align 8 .type number, @function number: .LASANPC4826: and in case reloc is issued for LASANPC label it also gets into .symtab with the same address as actual function symbol: $ nm -n vmlinux | grep 0000000001397150 0000000001397150 t .LASANPC4826 0000000001397150 t number In the end kernel backtraces are almost unreadable: [ 143.748476] Call Trace: [ 143.748484] ([<000000002da3e62c>] .LASANPC2671+0x114/0x190) [ 143.748492] [<000000002eca1a58>] .LASANPC2612+0x110/0x160 [ 143.748502] [<000000002de9d830>] print_address_description+0x80/0x3b0 [ 143.748511] [<000000002de9dd64>] __kasan_report+0x15c/0x1c8 [ 143.748521] [<000000002ecb56d4>] strrchr+0x34/0x60 [ 143.748534] [<000003ff800a9a40>] kasan_strings+0xb0/0x148 [test_kasan] [ 143.748547] [<000003ff800a9bba>] kmalloc_tests_init+0xe2/0x528 [test_kasan] [ 143.748555] [<000000002da2117c>] .LASANPC4069+0x354/0x748 [ 143.748563] [<000000002dbfbb16>] do_init_module+0x136/0x3b0 [ 143.748571] [<000000002dbff3f4>] .LASANPC3191+0x2164/0x25d0 [ 143.748580] [<000000002dbffc4c>] .LASANPC3196+0x184/0x1b8 [ 143.748587] [<000000002ecdf2ec>] system_call+0xd8/0x2d8 Since LASANPC labels are not even unique and get into .symtab only due to relocs filter them out in kallsyms. Signed-off-by: Vasily Gorbik Signed-off-by: Masahiro Yamada

Merge tag 'kbuild-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild

2019-03-11T00:48:21Z

Pull Kbuild updates from Masahiro Yamada: - do not generate unneeded top-level built-in.a - let git ignore O= directory entirely - optimize scripts/kallsyms slightly - exclude DWARF info from *.s regardless of config options - fix GCC toolchain search path for Clang to prepare ld.lld support - do not generate modules.order when CONFIG_MODULES is disabled - simplify single target rules and remove VPATH for external module build - allow to add optional flags to dpkg-buildpackage when building deb-pkg - move some compiler option tests from Makefile to Kconfig - various Makefile cleanups * tag 'kbuild-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (40 commits) kbuild: remove scripts/basic/% build target kbuild: use -Werror=implicit-... instead of -Werror-implicit-... kbuild: clean up scripts/gcc-version.sh kbuild: remove cc-version macro kbuild: update comment block of scripts/clang-version.sh kbuild: remove commented-out INITRD_COMPRESS kbuild: move -gsplit-dwarf, -gdwarf-4 option tests to Kconfig kbuild: [bin]deb-pkg: add DPKG_FLAGS variable kbuild: move ".config not found!" message from Kconfig to Makefile kbuild: invoke syncconfig if include/config/auto.conf.cmd is missing kbuild: simplify single target rules kbuild: remove empty rules for makefiles kbuild: make -r/-R effective in top Makefile for old Make versions kbuild: move tools_silent to a more relevant place kbuild: compute false-positive -Wmaybe-uninitialized cases in Kconfig kbuild: refactor cc-cross-prefix implementation kbuild: hardcode genksyms path and remove GENKSYMS variable scripts/gdb: refactor rules for symlink creation kbuild: create symlink to vmlinux-gdb.py in scripts_gdb target scripts/gdb: do not descend into scripts/gdb from scripts ...

kallsyms: include instead of

2019-02-19T13:50:34Z

is enough to include the definition of BITS_PER_LONG. Signed-off-by: Masahiro Yamada

kallsyms: remove unneeded memset() calls

2019-02-19T13:50:33Z

Global variables in the .bss section are zeroed out before the program starts to run. Signed-off-by: Masahiro Yamada

kallsyms: add static qualifiers where missing

2019-02-19T13:50:33Z

Fix the following sparse warnings: scripts/kallsyms.c:65:5: warning: symbol 'token_profit' was not declared. Should it be static? scripts/kallsyms.c:68:15: warning: symbol 'best_table' was not declared. Should it be static? scripts/kallsyms.c:69:15: warning: symbol 'best_table_len' was not declared. Should it be static? Also, remove 'inline' from is_arm_mapping_symbol(). The compiler will inline it anyway when it is appropriate to do so. Signed-off-by: Masahiro Yamada

kallsyms: Handle too long symbols in kallsyms.c

2019-01-28T04:02:09Z

When checking for symbols with excessively long names, account for null terminating character. Fixes: f3462aa952cf ("Kbuild: Handle longer symbols in kallsyms.c") Signed-off-by: Eugene Loh Acked-by: Ard Biesheuvel Signed-off-by: Masahiro Yamada

kallsyms: lower alignment on ARM

2019-01-06T00:46:51Z

As mentioned in the info pages of gas, the '.align' pseudo op's interpretation of the alignment value is architecture specific. It might either be a byte value or taken to the power of two. On ARM it's actually the latter which leads to unnecessary large alignments of 16 bytes for 32 bit builds or 256 bytes for 64 bit builds. Fix this by switching to '.balign' instead which is consistent across all architectures. Signed-off-by: Mathias Krause Cc: Catalin Marinas Cc: Will Deacon Signed-off-by: Masahiro Yamada

kallsyms: remove left-over Blackfin code

2018-09-10T13:54:33Z

These symbols were added by commit 028f042613c3 ("kallsyms: support kernel symbols in Blackfin on-chip memory") for Blackfin. The Blackfin support was removed by commit 4ba66a976072 ("arch: remove blackfin port"). Signed-off-by: Masahiro Yamada

kallsyms: reduce size a little on 64-bit

2018-09-10T13:54:33Z

Both kallsyms_num_syms and kallsyms_markers[] don't really need to use unsigned long as their (base) types; unsigned int fully suffices. Signed-off-by: Jan Beulich Signed-off-by: Masahiro Yamada

scripts: Fixed printf format mismatch

2018-05-29T13:04:12Z

scripts/kallsyms.c: function write_src: "printf", the #1 format specifier "d" need arg type "int", but the according arg "table_cnt" has type "unsigned int" scripts/recordmcount.c: function do_file: "fprintf", the #1 format specifier "d" need arg type "int", but the according arg "(*w2)(ehdr->e_machine)" has type "unsigned int" scripts/recordmcount.h: function find_secsym_ndx: "fprintf", the #1 format specifier "d" need arg type "int", but the according arg "txtndx" has type "unsigned int" Signed-off-by: nixiaoming Acked-by: Steven Rostedt (VMware) Signed-off-by: Masahiro Yamada