Displaying 6 results from an estimated 6 matches for "73b3c30cb7a3".
2018 May 24
2
[PATCH v3 21/27] x86/ftrace: Adapt function tracing for PIE support
...on.
> */
> + if (IS_ENABLED(CONFIG_X86_PIE))
> + addr -= 1;
This seems to modify the address even for modules that are _not_ compiled with
PIE, see below.
> return addr;
> }
>
> diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
> index 01ebcb6f263e..73b3c30cb7a3 100644
> --- a/arch/x86/kernel/ftrace.c
> +++ b/arch/x86/kernel/ftrace.c
> @@ -135,6 +135,44 @@ ftrace_modify_code_direct(unsigned long ip, unsigned const char *old_code,
> return 0;
> }
>
> +/* Bytes before call GOT offset */
> +const unsigned char got_call_preinsn[] =...
2018 May 24
2
[PATCH v3 21/27] x86/ftrace: Adapt function tracing for PIE support
...on.
> */
> + if (IS_ENABLED(CONFIG_X86_PIE))
> + addr -= 1;
This seems to modify the address even for modules that are _not_ compiled with
PIE, see below.
> return addr;
> }
>
> diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
> index 01ebcb6f263e..73b3c30cb7a3 100644
> --- a/arch/x86/kernel/ftrace.c
> +++ b/arch/x86/kernel/ftrace.c
> @@ -135,6 +135,44 @@ ftrace_modify_code_direct(unsigned long ip, unsigned const char *old_code,
> return 0;
> }
>
> +/* Bytes before call GOT offset */
> +const unsigned char got_call_preinsn[] =...
2018 May 24
1
[PATCH v3 21/27] x86/ftrace: Adapt function tracing for PIE support
...mpiled with
> > PIE, see below.
> Can one load a module not compiled for PIE in a kernel with PIE?
> >
> > > return addr;
> > > }
> > >
> > > diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
> > > index 01ebcb6f263e..73b3c30cb7a3 100644
> > > --- a/arch/x86/kernel/ftrace.c
> > > +++ b/arch/x86/kernel/ftrace.c
> > > @@ -135,6 +135,44 @@ ftrace_modify_code_direct(unsigned long ip,
unsigned const char *old_code,
> > > return 0;
> > > }
> > >
> > > +/* Bytes be...
2018 May 24
0
[PATCH v3 21/27] x86/ftrace: Adapt function tracing for PIE support
...ress even for modules that are _not_ compiled with
> PIE, see below.
Can one load a module not compiled for PIE in a kernel with PIE?
>
> > return addr;
> > }
> >
> > diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
> > index 01ebcb6f263e..73b3c30cb7a3 100644
> > --- a/arch/x86/kernel/ftrace.c
> > +++ b/arch/x86/kernel/ftrace.c
> > @@ -135,6 +135,44 @@ ftrace_modify_code_direct(unsigned long ip, unsigned const char *old_code,
> > return 0;
> > }
> >
> > +/* Bytes before call GOT offset */
> > +...
2018 May 23
0
[PATCH v3 21/27] x86/ftrace: Adapt function tracing for PIE support
...d_rodata_hpage_align[];
extern char __entry_trampoline_start[], __entry_trampoline_end[];
#endif
+#if defined(CONFIG_X86_PIE)
+extern char __start_got[], __end_got[];
+#endif
+
#endif /* _ASM_X86_SECTIONS_H */
diff --git a/arch/x86/kernel/ftrace.c b/arch/x86/kernel/ftrace.c
index 01ebcb6f263e..73b3c30cb7a3 100644
--- a/arch/x86/kernel/ftrace.c
+++ b/arch/x86/kernel/ftrace.c
@@ -102,7 +102,7 @@ static const unsigned char *ftrace_nop_replace(void)
static int
ftrace_modify_code_direct(unsigned long ip, unsigned const char *old_code,
- unsigned const char *new_code)
+ unsigned const char *new...
2018 May 23
33
[PATCH v3 00/27] x86: PIE support and option to extend KASLR randomization
Changes:
- patch v3:
- Update on message to describe longer term PIE goal.
- Minor change on ftrace if condition.
- Changed code using xchgq.
- patch v2:
- Adapt patch to work post KPTI and compiler changes
- Redo all performance testing with latest configs and compilers
- Simplify mov macro on PIE (MOVABS now)
- Reduce GOT footprint
- patch v1:
- Simplify ftrace