MIPS: Provide arch_syscall_addr.

The generic version is wrong for MIPS.

Signed-off-by: Ralf Baechle <ralf@linux-mips.org>

1 files changed, 33 insertions, 0 deletions

diff --git a/arch/mips/kernel/ftrace.c b/arch/mips/kernel/ftrace.c
index dba90ec0dc38..6e022c44f447 100644
--- a/arch/mips/kernel/ftrace.c
+++ b/arch/mips/kernel/ftrace.c
@@ -11,11 +11,14 @@
 #include <linux/uaccess.h>
 #include <linux/init.h>
 #include <linux/ftrace.h>
+#include <linux/syscalls.h>
 
 #include <asm/asm.h>
 #include <asm/asm-offsets.h>
 #include <asm/cacheflush.h>
+#include <asm/syscall.h>
 #include <asm/uasm.h>
+#include <asm/unistd.h>
 
 #include <asm-generic/sections.h>
 
@@ -364,3 +367,33 @@ out:
         WARN_ON(1);
 }
 #endif  /* CONFIG_FUNCTION_GRAPH_TRACER */
+
+#ifdef CONFIG_FTRACE_SYSCALLS
+
+#ifdef CONFIG_32BIT
+unsigned long __init arch_syscall_addr(int nr)
+{
+        return (unsigned long)sys_call_table[nr - __NR_O32_Linux];
+}
+#endif
+
+#ifdef CONFIG_64BIT
+
+unsigned long __init arch_syscall_addr(int nr)
+{
+#ifdef CONFIG_MIPS32_N32
+        if (nr >= __NR_N32_Linux && nr <= __NR_N32_Linux + __NR_N32_Linux_syscalls)
+                return (unsigned long)sysn32_call_table[(nr - __NR_N32_Linux) * 2];
+#endif
+        if (nr >= __NR_64_Linux  && nr <= __NR_64_Linux + __NR_64_Linux_syscalls)
+                return (unsigned long)sys_call_table[nr - __NR_64_Linux];
+#ifdef CONFIG_MIPS32_O32
+        if (nr >= __NR_O32_Linux && nr <= __NR_O32_Linux + __NR_O32_Linux_syscalls)
+                return (unsigned long)sys32_call_table[nr - __NR_O32_Linux];
+#endif
+
+        return (unsigned long) &sys_ni_syscall;
+}
+#endif
+
+#endif /* CONFIG_FTRACE_SYSCALLS */