tree: git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git for-kernelci head: 3d803745c0cdcca58579eb2654530bf4be3bef72 commit: 3d803745c0cdcca58579eb2654530bf4be3bef72 [1/1] ARM: set textoffset to 4 MiB unconditionally config: arm-randconfig-r034-20211207 (https://download.01.org/0day-ci/archive/20211210/202112100747.znK7leLP-lk...) compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project 097a1cb1d5ebb3a0ec4bcaed8ba3ff6a8e33c00a) reproduce (this is a W=1 build): wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # install arm cross compiling tool for clang build # apt-get install binutils-arm-linux-gnueabi # https://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git/commit/?id... git remote add ardb git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git git fetch --no-tags ardb for-kernelci git checkout 3d803745c0cdcca58579eb2654530bf4be3bef72 # save the config file to linux build tree mkdir build_dir COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=arm SHELL=/bin/bash If you fix the issue, kindly add following tag as appropriate Reported-by: kernel test robot <lkp(a)intel.com&gt; All errors (new ones prefixed by >>): add r4, r0, #0x00408000 ^ arch/arm/boot/compressed/head.S:315:16: note: invalid operand for instruction add r4, r0, #0x00408000 ^ arch/arm/boot/compressed/head.S:315:16: note: operand must be a register in range [r0, r15] add r4, r0, #0x00408000 ^ arch/arm/boot/compressed/head.S:315:3: note: instruction requires: thumb2 add r4, r0, #0x00408000 ^ arch/arm/boot/compressed/head.S:413:3: error: invalid instruction, any one of the following would fix this: sub r0, r4, #0x00408000 ^ arch/arm/boot/compressed/head.S:413:16: note: invalid operand for instruction sub r0, r4, #0x00408000 ^ arch/arm/boot/compressed/head.S:413:16: note: operand must be a register in range [r0, r15] sub r0, r4, #0x00408000 ^ arch/arm/boot/compressed/head.S:413:3: note: instruction requires: thumb2 sub r0, r4, #0x00408000 ^ vim +315 arch/arm/boot/compressed/head.S 0673cb38951215 Geert Uytterhoeven 2021-01-04 300 0673cb38951215 Geert Uytterhoeven 2021-01-04 301 /* 0673cb38951215 Geert Uytterhoeven 2021-01-04 302 * Make sure we have some stack before calling C code. 0673cb38951215 Geert Uytterhoeven 2021-01-04 303 * No GOT fixup has occurred yet, but none of the code we're 0673cb38951215 Geert Uytterhoeven 2021-01-04 304 * about to call uses any global variables. 0673cb38951215 Geert Uytterhoeven 2021-01-04 305 */ 0673cb38951215 Geert Uytterhoeven 2021-01-04 306 ldr sp, [r1] @ get stack location 0673cb38951215 Geert Uytterhoeven 2021-01-04 307 add sp, sp, r1 @ apply relocation 0673cb38951215 Geert Uytterhoeven 2021-01-04 308 0673cb38951215 Geert Uytterhoeven 2021-01-04 309 /* Validate calculated start against passed DTB */ 0673cb38951215 Geert Uytterhoeven 2021-01-04 310 mov r1, r8 0673cb38951215 Geert Uytterhoeven 2021-01-04 311 bl fdt_check_mem_start 0673cb38951215 Geert Uytterhoeven 2021-01-04 312 1: 0673cb38951215 Geert Uytterhoeven 2021-01-04 313 #endif /* CONFIG_USE_OF */ 0a6a78b8b3c1c1 Russell King 2015-03-26 314 /* Determine final kernel image address. */ 0673cb38951215 Geert Uytterhoeven 2021-01-04 @315 add r4, r0, #TEXT_OFFSET e69edc7939abda Eric Miao 2010-07-05 316 #else 9e84ed63dc71e1 Russell King 2010-09-09 317 ldr r4, =zreladdr e69edc7939abda Eric Miao 2010-07-05 318 #endif ^1da177e4c3f41 Linus Torvalds 2005-04-16 319 2874865c1271cc Nicolas Pitre 2013-06-06 320 /* 2874865c1271cc Nicolas Pitre 2013-06-06 321 * Set up a page table only if it won't overwrite ourself. 7d57909bf69f21 Masahiro Yamada 2015-01-20 322 * That means r4 < pc || r4 - 16k page directory > &_end. 2874865c1271cc Nicolas Pitre 2013-06-06 323 * Given that r4 > &_end is most unfrequent, we add a rough 2874865c1271cc Nicolas Pitre 2013-06-06 324 * additional 1MB of room for a possible appended DTB. 2874865c1271cc Nicolas Pitre 2013-06-06 325 */ 2874865c1271cc Nicolas Pitre 2013-06-06 326 mov r0, pc 2874865c1271cc Nicolas Pitre 2013-06-06 327 cmp r0, r4 691cbe5ba5f77f Ard Biesheuvel 2020-04-13 328 ldrcc r0, .Lheadroom 2874865c1271cc Nicolas Pitre 2013-06-06 329 addcc r0, r0, pc 2874865c1271cc Nicolas Pitre 2013-06-06 330 cmpcc r4, r0 2874865c1271cc Nicolas Pitre 2013-06-06 331 orrcc r4, r4, #1 @ remember we skipped cache_on 2874865c1271cc Nicolas Pitre 2013-06-06 332 blcs cache_on 6d7d0ae5157494 Nicolas Pitre 2011-02-21 333 :::::: The code at line 315 was first introduced by commit :::::: 0673cb38951215060d7993b43ad3c45cd413c2c3 ARM: 9045/1: uncompress: Validate start of physical memory against passed DTB :::::: TO: Geert Uytterhoeven <geert+renesas(a)glider.be&gt; :::::: CC: Russell King <rmk+kernel(a)armlinux.org.uk&gt; --- 0-DAY CI Kernel Test Service, Intel Corporation https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org