From mboxrd@z Thu Jan 1 00:00:00 1970 Reply-To: kernel-hardening@lists.openwall.com References: <1459415142-3412-1-git-send-email-matt.redfearn@imgtec.com> <1459415142-3412-12-git-send-email-matt.redfearn@imgtec.com> From: Sergei Shtylyov Message-ID: <56FD1A32.10204@cogentembedded.com> Date: Thu, 31 Mar 2016 15:38:10 +0300 MIME-Version: 1.0 In-Reply-To: <1459415142-3412-12-git-send-email-matt.redfearn@imgtec.com> Content-Type: text/plain; charset=windows-1252; format=flowed Content-Transfer-Encoding: 7bit Subject: [kernel-hardening] Re: [PATCH v2 11/11] MIPS: KASLR: Print relocation Information on boot To: Matt Redfearn , Ralf Baechle Cc: linux-mips@linux-mips.org, kernel-hardening@lists.openwall.com, Aaro Koskinen , Masahiro Yamada , Alexander Sverdlin , linux-kernel@vger.kernel.org, Jaedon Shin , Jonas Gorski , Paul Burton List-ID: Hello. On 3/31/2016 12:05 PM, Matt Redfearn wrote: > When debugging a relocated kernel, the addresses of the relocated > symbols and the offset applied is essential information. If the kernel > is compiled with debugging information, then print this information > during bootup using the same function as the panic notifer. Notifier. > Signed-off-by: Matt Redfearn > --- > > Changes in v2: None > > arch/mips/kernel/setup.c | 9 +++++++++ > 1 file changed, 9 insertions(+) > > diff --git a/arch/mips/kernel/setup.c b/arch/mips/kernel/setup.c > index d8376d7b3345..ae71f8d9b555 100644 > --- a/arch/mips/kernel/setup.c > +++ b/arch/mips/kernel/setup.c > @@ -477,9 +477,18 @@ static void __init bootmem_init(void) > */ > if (__pa_symbol(_text) > __pa_symbol(VMLINUX_LOAD_ADDRESS)) { > unsigned long offset; > + extern void show_kernel_relocation(const char *level); > > offset = __pa_symbol(_text) - __pa_symbol(VMLINUX_LOAD_ADDRESS); > free_bootmem(__pa_symbol(VMLINUX_LOAD_ADDRESS), offset); > + > +#if (defined CONFIG_DEBUG_KERNEL) && (defined CONFIG_DEBUG_INFO) Not #if defined(CONFIG_DEBUG_KERNEL) && defined(CONFIG_DEBUG_INFO)? [...] MBR, Sergei