Hi Christophe, Thank you for the patch! Yet something to improve:
[auto build test ERROR on powerpc/next] [also build test ERROR on v5.0-rc8] [cannot apply to next-20190225] [if your patch is applied to the wrong git tree, please drop us a note to help improve the system] url: https://github.com/0day-ci/linux/commits/Christophe-Leroy/KASAN-for-powerpc-32/20190226-052610 base: https://git.kernel.org/pub/scm/linux/kernel/git/powerpc/linux.git next config: powerpc-defconfig (attached as .config) compiler: powerpc64-linux-gnu-gcc (Debian 8.2.0-11) 8.2.0 reproduce: wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross chmod +x ~/bin/make.cross # save the attached .config to linux build tree GCC_VERSION=8.2.0 make.cross ARCH=powerpc All errors (new ones prefixed by >>): arch/powerpc/lib/mem_64.S: Assembler messages: >> arch/powerpc/lib/mem_64.S:35: Error: unrecognized opcode: >> `_global_kasan(memset)' >> arch/powerpc/lib/mem_64.S:100: Error: unrecognized opcode: >> `export_symbol_kasan(memset)' >> arch/powerpc/lib/mem_64.S:102: Error: unrecognized opcode: >> `_global_toc_kasan(memmove)' >> arch/powerpc/lib/mem_64.S:143: Error: unrecognized opcode: >> `export_symbol_kasan(memmove)' -- arch/powerpc/lib/memcpy_64.S: Assembler messages: >> arch/powerpc/lib/memcpy_64.S:21: Error: unrecognized opcode: >> `_global_toc_kasan(memcpy)' >> arch/powerpc/lib/memcpy_64.S:232: Error: unrecognized opcode: >> `export_symbol_kasan(memcpy)' vim +35 arch/powerpc/lib/mem_64.S 34 > 35 _GLOBAL_KASAN(memset) 36 neg r0,r3 37 rlwimi r4,r4,8,16,23 38 andi. r0,r0,7 /* # bytes to be 8-byte aligned */ 39 rlwimi r4,r4,16,0,15 40 cmplw cr1,r5,r0 /* do we get that far? */ 41 rldimi r4,r4,32,0 42 .Lms: PPC_MTOCRF(1,r0) 43 mr r6,r3 44 blt cr1,8f 45 beq 3f /* if already 8-byte aligned */ 46 subf r5,r0,r5 47 bf 31,1f 48 stb r4,0(r6) 49 addi r6,r6,1 50 1: bf 30,2f 51 sth r4,0(r6) 52 addi r6,r6,2 53 2: bf 29,3f 54 stw r4,0(r6) 55 addi r6,r6,4 56 3: srdi. r0,r5,6 57 clrldi r5,r5,58 58 mtctr r0 59 beq 5f 60 .balign 16 61 4: std r4,0(r6) 62 std r4,8(r6) 63 std r4,16(r6) 64 std r4,24(r6) 65 std r4,32(r6) 66 std r4,40(r6) 67 std r4,48(r6) 68 std r4,56(r6) 69 addi r6,r6,64 70 bdnz 4b 71 5: srwi. r0,r5,3 72 clrlwi r5,r5,29 73 PPC_MTOCRF(1,r0) 74 beq 8f 75 bf 29,6f 76 std r4,0(r6) 77 std r4,8(r6) 78 std r4,16(r6) 79 std r4,24(r6) 80 addi r6,r6,32 81 6: bf 30,7f 82 std r4,0(r6) 83 std r4,8(r6) 84 addi r6,r6,16 85 7: bf 31,8f 86 std r4,0(r6) 87 addi r6,r6,8 88 8: cmpwi r5,0 89 PPC_MTOCRF(1,r5) 90 beqlr 91 bf 29,9f 92 stw r4,0(r6) 93 addi r6,r6,4 94 9: bf 30,10f 95 sth r4,0(r6) 96 addi r6,r6,2 97 10: bflr 31 98 stb r4,0(r6) 99 blr > 100 EXPORT_SYMBOL_KASAN(memset) 101 > 102 _GLOBAL_TOC_KASAN(memmove) 103 cmplw 0,r3,r4 104 bgt backwards_memcpy 105 b memcpy 106 107 _GLOBAL(backwards_memcpy) 108 rlwinm. r7,r5,32-3,3,31 /* r0 = r5 >> 3 */ 109 add r6,r3,r5 110 add r4,r4,r5 111 beq 2f 112 andi. r0,r6,3 113 mtctr r7 114 bne 5f 115 .balign 16 116 1: lwz r7,-4(r4) 117 lwzu r8,-8(r4) 118 stw r7,-4(r6) 119 stwu r8,-8(r6) 120 bdnz 1b 121 andi. r5,r5,7 122 2: cmplwi 0,r5,4 123 blt 3f 124 lwzu r0,-4(r4) 125 subi r5,r5,4 126 stwu r0,-4(r6) 127 3: cmpwi 0,r5,0 128 beqlr 129 mtctr r5 130 4: lbzu r0,-1(r4) 131 stbu r0,-1(r6) 132 bdnz 4b 133 blr 134 5: mtctr r0 135 6: lbzu r7,-1(r4) 136 stbu r7,-1(r6) 137 bdnz 6b 138 subf r5,r0,r5 139 rlwinm. r7,r5,32-3,3,31 140 beq 2b 141 mtctr r7 142 b 1b > 143 EXPORT_SYMBOL_KASAN(memmove) --- 0-DAY kernel test infrastructure Open Source Technology Center https://lists.01.org/pipermail/kbuild-all Intel Corporation
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