linux-kernel - BUG: perf error on syscalls for powerpc64.

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]

Message-ID: <CA+Y31wfLFe11nh9AVs2JgKrxpMc6qxxDyCfey52HT23S7RJ_zw@mail.gmail.com>
Date:	Thu, 16 Jul 2015 13:57:17 +0800
From:	Zumeng Chen <zumeng.chen@...il.com>
To:	linuxppc-dev@...ts.ozlabs.org
Cc:	linux-kernel@...r.kernel.org, romeo.cane.ext@...iant.com,
	imunsie@....ibm.com, mpe@...erman.id.au, paulus@...ba.org,
	benh@...nel.crashing.org
Subject: BUG: perf error on syscalls for powerpc64.

Hi All,

1028ccf5 did a change for sys_call_table from a pointer to an array of
unsigned long, I think it's not proper, here is my reason:

sys_call_table defined as a label in assembler should be pointer array
rather than an array as described in 1028ccf5. If we defined it as an
array, then arch_syscall_addr will return the address of sys_call_table[],
actually the content of sys_call_table[] is demanded by arch_syscall_addr.
so 'perf list' will ignore all syscalls since find_syscall_meta will
return null
in init_ftrace_syscalls because of the wrong arch_syscall_addr.

Did I miss something, or Gcc compiler has done something newer ?

Cheers,
Zumeng
--
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@...r.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/