From: Ian Munsie <imun...@au1.ibm.com>
This patch adds the necessary infrastructure to trace 32bit compat
syscalls on PowerPC64.
Signed-off-by: Ian Munsie <imun...@au1.ibm.com>
---
arch/powerpc/Kconfig | 1 +
arch/powerpc/include/asm/unistd.h | 4 ++++
arch/powerpc/kernel/ftrace.c | 7 +++++++
3 files changed, 12 insertions(+), 0 deletions(-)
diff --git a/arch/powerpc/Kconfig b/arch/powerpc/Kconfig
index 0d5c28d..a724c93 100644
--- a/arch/powerpc/Kconfig
+++ b/arch/powerpc/Kconfig
@@ -142,6 +142,7 @@ config PPC
select HAVE_PERF_EVENTS
select HAVE_REGS_AND_STACK_ACCESS_API
select HAVE_SYSCALL_TRACEPOINTS
+ select HAVE_COMPAT_FTRACE_SYSCALLS if PPC64
config EARLY_PRINTK
bool
diff --git a/arch/powerpc/include/asm/unistd.h
b/arch/powerpc/include/asm/unistd.h
index f0a1026..f584b71 100644
--- a/arch/powerpc/include/asm/unistd.h
+++ b/arch/powerpc/include/asm/unistd.h
@@ -353,6 +353,10 @@
#define __NR__exit __NR_exit
#define NR_syscalls __NR_syscalls
+#ifdef CONFIG_PPC64
+#define NR_syscalls_compat NR_syscalls
+#endif
+
#ifndef __ASSEMBLY__
#include <linux/types.h>
diff --git a/arch/powerpc/kernel/ftrace.c b/arch/powerpc/kernel/ftrace.c
index f5fadbb..dddbc33 100644
--- a/arch/powerpc/kernel/ftrace.c
+++ b/arch/powerpc/kernel/ftrace.c
@@ -619,3 +619,10 @@ inline bool arch_syscall_match_sym_name(const char *sym,
const char *name)
return (!strcmp(sym + 4, name + 3));
}
#endif /* CONFIG_FTRACE_SYSCALLS && CONFIG_PPC64 */
+
+#ifdef CONFIG_COMPAT_FTRACE_SYSCALLS
+unsigned long __init arch_compat_syscall_addr(int nr)
+{
+ return sys_call_table[nr*2+1];
+}
+#endif
--
1.7.1
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