linux-dev/arch/x86/tools, branch master

x86/tools/relocs: Ignore __kcfi_typeid_ relocations

2022-09-26T17:13:15Z

The compiler generates __kcfi_typeid_ symbols for annotating assembly functions with type information. These are constants that can be referenced in assembly code and are resolved by the linker. Ignore them in relocs. Signed-off-by: Sami Tolvanen Reviewed-by: Kees Cook Tested-by: Kees Cook Tested-by: Nathan Chancellor Acked-by: Peter Zijlstra (Intel) Tested-by: Peter Zijlstra (Intel) Signed-off-by: Kees Cook Link: https://lore.kernel.org/r/20220908215504.3686827-20-samitolvanen@google.com

x86/build: Use the proper name CONFIG_FW_LOADER

2021-12-29T21:20:38Z

Commit in Fixes intends to add the expression regex only when FW_LOADER is enabled - not FW_LOADER_BUILTIN. Latter is a leftover from a previous patchset and not a valid config item. So, adjust the condition to the actual name of the config. [ bp: Cleanup commit message. ] Fixes: c8dcf655ec81 ("x86/build: Tuck away built-in firmware under FW_LOADER") Signed-off-by: Lukas Bulwahn Signed-off-by: Borislav Petkov Reviewed-by: Greg Kroah-Hartman Link: https://lore.kernel.org/r/20211229111553.5846-1-lukas.bulwahn@gmail.com

Merge tag 'driver-core-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core

2021-11-04T15:32:38Z

Pull driver core updates from Greg KH: "Here is the big set of driver core changes for 5.16-rc1. All of these have been in linux-next for a while now with no reported problems. Included in here are: - big update and cleanup of the sysfs abi documentation files and scripts from Mauro. We are almost at the place where we can properly check that the running kernel's sysfs abi is documented fully. - firmware loader updates - dyndbg updates - kernfs cleanups and fixes from Christoph - device property updates - component fix - other minor driver core cleanups and fixes" * tag 'driver-core-5.16-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/gregkh/driver-core: (122 commits) device property: Drop redundant NULL checks x86/build: Tuck away built-in firmware under FW_LOADER vmlinux.lds.h: wrap built-in firmware support under FW_LOADER firmware_loader: move struct builtin_fw to the only place used x86/microcode: Use the firmware_loader built-in API firmware_loader: remove old DECLARE_BUILTIN_FIRMWARE() firmware_loader: formalize built-in firmware API component: do not leave master devres group open after bind dyndbg: refine verbosity 1-4 summary-detail gpiolib: acpi: Replace custom code with device_match_acpi_handle() i2c: acpi: Replace custom function with device_match_acpi_handle() driver core: Provide device_match_acpi_handle() helper dyndbg: fix spurious vNpr_info change dyndbg: no vpr-info on empty queries dyndbg: vpr-info on remove-module complete, not starting device property: Add missed header in fwnode.h Documentation: dyndbg: Improve cli param examples dyndbg: Remove support for ddebug_query param dyndbg: make dyndbg a known cli param dyndbg: show module in vpr-info in dd-exec-queries ...

x86/tools/relocs: Support >64K section headers

2021-10-27T09:07:58Z

While the relocs tool already supports finding the total number of section headers if vmlinux exceeds 64K sections, it fails to read the extended symbol table to get section header indexes for symbols, causing incorrect symbol table indexes to be used when there are > 64K symbols. Parse the ELF file to read the extended symbol table info, and then replace all direct references to st_shndx with calls to sym_index(), which will determine whether the value can be read directly or whether the value should be pulled out of the extended table. This is needed for future FGKASLR support, which uses a separate section per function. Signed-off-by: Kristen Carlson Accardi Signed-off-by: Alexander Lobakin Signed-off-by: Kees Cook Signed-off-by: Peter Zijlstra (Intel) Reviewed-by: Kees Cook Reviewed-by: Tony Luck Acked-by: H. Peter Anvin (Intel) Tested-by: Tony Luck Link: https://lore.kernel.org/r/20211013175742.1197608-2-keescook@chromium.org

x86/build: Tuck away built-in firmware under FW_LOADER

2021-10-22T12:14:01Z

When FW_LOADER is modular or disabled we don't use it. Update x86 relocs to reflect that. Reviewed-by: Borislav Petkov Signed-off-by: Luis Chamberlain Link: https://lore.kernel.org/r/20211021155843.1969401-7-mcgrof@kernel.org Signed-off-by: Greg Kroah-Hartman

Merge tag 'x86_build_for_v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip

2021-08-30T20:27:16Z

Pull x86 build updates from Borislav Petkov: - Remove cc-option checks which are old and already supported by the minimal compiler version the kernel uses and thus avoid the need to invoke the compiler unnecessarily. - Cleanups * tag 'x86_build_for_v5.15' of git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip: x86/build: Move the install rule to arch/x86/Makefile x86/build: Remove the left-over bzlilo target x86/tools/relocs: Mark die() with the printf function attr format x86/build: Remove stale cc-option checks

x86/tools/relocs: Mark die() with the printf function attr format

2021-08-23T03:58:02Z

Mark die() as a function which accepts printf-style arguments so that the compiler can typecheck them against the supplied format string. Use the C99 inttypes.h format specifiers as relocs.c gets built for both 32- and 64-bit. Original version of the patch by Greg Kroah-Hartman Signed-off-by: Borislav Petkov Reviewed-by: Greg Kroah-Hartman Link: http://lkml.kernel.org/r/YNnb6Q4QHtNYC049@zn.tnic

x86/tools: Fix objdump version check again

2021-08-12T15:17:25Z

Skip (omit) any version string info that is parenthesized. Warning: objdump version 15) is older than 2.19 Warning: Skipping posttest. where 'objdump -v' says: GNU objdump (GNU Binutils; SUSE Linux Enterprise 15) 2.35.1.20201123-7.18 Fixes: 8bee738bb1979 ("x86: Fix objdump version check in chkobjdump.awk for different formats.") Signed-off-by: Randy Dunlap Signed-off-by: Thomas Gleixner Reviewed-by: Masami Hiramatsu Link: https://lore.kernel.org/r/20210731000146.2720-1-rdunlap@infradead.org

x86/tools/relocs: Fix non-POSIX regexp

2021-08-05T11:51:11Z

Trying to run a cross-compiled x86 relocs tool on a BSD based HOSTCC leads to errors like VOFFSET arch/x86/boot/compressed/../voffset.h - due to: vmlinux CC arch/x86/boot/compressed/misc.o - due to: arch/x86/boot/compressed/../voffset.h OBJCOPY arch/x86/boot/compressed/vmlinux.bin - due to: vmlinux RELOCS arch/x86/boot/compressed/vmlinux.relocs - due to: vmlinux empty (sub)expressionarch/x86/boot/compressed/Makefile:118: recipe for target 'arch/x86/boot/compressed/vmlinux.relocs' failed make[3]: *** [arch/x86/boot/compressed/vmlinux.relocs] Error 1 It turns out that relocs.c uses patterns like "something(|_end)" This is not valid syntax or gives undefined results according to POSIX 9.5.3 ERE Grammar https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/V1_chap09.html It seems to be silently accepted by the Linux regexp() implementation while a BSD host complains. Such patterns can be replaced by a transformation like "(|p1|p2)" -> "(p1|p2)?" Fixes: fd952815307f ("x86-32, relocs: Whitelist more symbols for ld bug workaround") Signed-off-by: H. Nikolaus Schaller Signed-off-by: Masahiro Yamada

x86/tools/insn_sanity: Convert to insn_decode()

2021-03-15T11:21:11Z

Simplify code, no functional changes. Signed-off-by: Borislav Petkov Link: https://lkml.kernel.org/r/20210304174237.31945-19-bp@alien8.de