Messages in this thread Patch in this message |  | | From | Marcin Nowakowski <> | Subject | [PATCH v4 09/12] powerpc/tracing: fix compat syscall handling | Date | Fri, 14 Oct 2016 10:35:12 +0200 |
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Adapt the code to make use of new syscall handling interface
Signed-off-by: Marcin Nowakowski <marcin.nowakowski@imgtec.com> Cc: Steven Rostedt <rostedt@goodmis.org> Cc: Ingo Molnar <mingo@redhat.com> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Paul Mackerras <paulus@samba.org> Cc: Michael Ellerman <mpe@ellerman.id.au> Cc: linuxppc-dev@lists.ozlabs.org --- arch/powerpc/include/asm/ftrace.h | 13 +++++++++++++ arch/powerpc/kernel/ftrace.c | 4 ++++ 2 files changed, 17 insertions(+)
diff --git a/arch/powerpc/include/asm/ftrace.h b/arch/powerpc/include/asm/ftrace.h index f266051..c6c660d 100644 --- a/arch/powerpc/include/asm/ftrace.h +++ b/arch/powerpc/include/asm/ftrace.h @@ -72,4 +72,17 @@ struct dyn_arch_ftrace { #define ARCH_SYM_NAME_SKIP_CHARS 1 #endif +#if defined(CONFIG_FTRACE_SYSCALLS) && !defined(__ASSEMBLY__) +#if defined(CONFIG_COMPAT) +#include <linux/compat.h> +#include <asm/compat.h> + +#define ARCH_COMPAT_SYSCALL_NUMBERS_OVERLAP 1 +static inline bool arch_trace_is_compat_syscall(struct pt_regs *regs) +{ + return in_compat_syscall(); +} +#endif /* CONFIG_COMPAT */ +#endif /* CONFIG_FTRACE_SYSCALLS && !__ASSEMBLY__ */ + #endif /* _ASM_POWERPC_FTRACE */ diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c index 5bfb35f..12c00f7 100644 --- a/arch/powerpc/kernel/ftrace.c +++ b/arch/powerpc/kernel/ftrace.c @@ -606,6 +606,10 @@ unsigned long prepare_ftrace_return(unsigned long parent, unsigned long ip) #if defined(CONFIG_FTRACE_SYSCALLS) && defined(CONFIG_PPC64) unsigned long __init arch_syscall_addr(int nr, bool compat) { +#ifdef CONFIG_COMPAT + if (compat) + return sys_call_table[nr*2+1]; +#endif return sys_call_table[nr*2]; } #endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_PPC64 */ -- 2.7.4
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