linux-kernel - objtool warning for wanxl_pci_init

lists.openwall.net		lists / announce owl-users owl-dev john-users john-dev passwdqc-users yescrypt popa3d-users / oss-security kernel-hardening musl sabotage tlsify passwords / crypt-dev xvendor / Bugtraq Full-Disclosure linux-kernel linux-netdev linux-ext4 linux-hardening linux-cve-announce PHC
Open Source and information security mailing list archives

Hash Suite: Windows password security audit tool. GUI, reports in PDF.

[<prev] [next>] [thread-next>] [day] [month] [year] [list]

Date:   Wed, 04 Jan 2017 12:19:20 +0100
From:   Arnd Bergmann <arnd@...db.de>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     linux-kernel@...r.kernel.org
Subject: objtool warning for wanxl_pci_init_one with gcc-7

Hi Josh,

I'm getting a new warning with the latest gcc-7 snapshot, I think this
is a false positive:

drivers/net/wan/wanxl.o: warning: objtool: wanxl_pci_init_one()+0x9d2: sibling call from callable instruction with changed frame pointer

# /git/arm-soc/drivers/net/wan/wanxl.c:133:     switch((value >> STATUS_CABLE_PM_SHIFT) & 0x7) {
        movl    %eax, %ecx      # value, _314
        movl    %eax, %r10d     # value, _224
        movq    (%r15), %rdi    # MEM[base: _546, offset: 0B], pretmp_490
        shrl    $5, %ecx        #, _314
        andl    $8, %r10d       #, _224
        movl    %ecx, %edx      # _314, tmp377
        andl    $7, %edx        #, tmp377
        jmp     *(%r14,%rdx,8)  #
        .section        .rodata
        .align 8
        .align 4
.L280:
        .quad   .L278
        .quad   .L278
        .quad   .L279
        .quad   .L281
        .quad   .L282
        .quad   .L305
        .quad   .L278
        .quad   .L306
        .text

	Arnd