6.12-stable review patch. If anyone has any objections, please let me know.
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From: Christophe Leroy christophe.leroy@csgroup.eu
[ Upstream commit 1e4d73d06c98f5a1af4f7591cf7c2c4eee5b94fa ]
The following build warning has been reported:
arch/powerpc/crypto/ghashp8-ppc.o: warning: objtool: .text+0x22c: unannotated intra-function call
This happens due to commit bb7f054f4de2 ("objtool/powerpc: Add support for decoding all types of uncond branches")
Disassembly of arch/powerpc/crypto/ghashp8-ppc.o shows:
arch/powerpc/crypto/ghashp8-ppc.o: file format elf64-powerpcle
Disassembly of section .text:
0000000000000140 <gcm_ghash_p8>: 140: f8 ff 00 3c lis r0,-8 ... 20c: 20 00 80 4e blr 210: 00 00 00 00 .long 0x0 214: 00 0c 14 00 .long 0x140c00 218: 00 00 04 00 .long 0x40000 21c: 00 00 00 00 .long 0x0 220: 47 48 41 53 rlwimi. r1,r26,9,1,3 224: 48 20 66 6f xoris r6,r27,8264 228: 72 20 50 6f xoris r16,r26,8306 22c: 77 65 72 49 bla 1726574 <gcm_ghash_p8+0x1726434> <== ...
It corresponds to the following code in ghashp8-ppc.o :
_GLOBAL(gcm_ghash_p8) lis 0,0xfff8 ... blr .long 0 .byte 0,12,0x14,0,0,0,4,0 .long 0 .size gcm_ghash_p8,.-gcm_ghash_p8
.byte 71,72,65,83,72,32,102,111,114,32,80,111,119,101,114,73,83,65,32,50,46,48,55,44,32,67,82,89,80,84,79,71,65,77,83,32,98,121,32,60,97,112,112,114,111,64,111,112,101,110,115,115,108,46,111,114,103,62,0 .align 2 .align 2
In fact this is raw data that is after the function end and that is not text so shouldn't be disassembled as text. But ghashp8-ppc.S is generated by a perl script and should have been marked as OBJECT_FILES_NON_STANDARD.
Now that 'bla' is understood as a call instruction, that raw data is mis-interpreted as an infra-function call.
Mark ghashp8-ppc.o as a OBJECT_FILES_NON_STANDARD to avoid this warning.
Reported-by: Venkat Rao Bagalkote venkat88@linux.ibm.com Closes: https://lore.kernel.org/all/8c4c3fc2-2bd7-4148-af68-2f504d6119e0@linux.ibm.c... Fixes: 109303336a0c ("crypto: vmx - Move to arch/powerpc/crypto") Signed-off-by: Christophe Leroy christophe.leroy@csgroup.eu Tested-By: Venkat Rao Bagalkote venkat88@linux.ibm.com Reviewed-by: Sathvika Vasireddy sv@linux.ibm.com Signed-off-by: Madhavan Srinivasan maddy@linux.ibm.com Link: https://patch.msgid.link/7aa7eb73fe6bc95ac210510e22394ca0ae227b69.1741128786... Signed-off-by: Sasha Levin sashal@kernel.org --- arch/powerpc/crypto/Makefile | 1 + 1 file changed, 1 insertion(+)
diff --git a/arch/powerpc/crypto/Makefile b/arch/powerpc/crypto/Makefile index 59808592f0a1b..1e52b02d8943b 100644 --- a/arch/powerpc/crypto/Makefile +++ b/arch/powerpc/crypto/Makefile @@ -56,3 +56,4 @@ $(obj)/aesp8-ppc.S $(obj)/ghashp8-ppc.S: $(obj)/%.S: $(src)/%.pl FORCE OBJECT_FILES_NON_STANDARD_aesp10-ppc.o := y OBJECT_FILES_NON_STANDARD_ghashp10-ppc.o := y OBJECT_FILES_NON_STANDARD_aesp8-ppc.o := y +OBJECT_FILES_NON_STANDARD_ghashp8-ppc.o := y