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authorAl Viro <viro@zeniv.linux.org.uk>2013-01-22 00:25:54 +0400
committerAl Viro <viro@zeniv.linux.org.uk>2013-03-04 07:58:33 +0400
commit2cf0966683430b6468f36ca20515a33ca7f2403c (patch)
tree902080486ebd7988d1250914c3809c4de472a22b /include/linux/syscalls.h
parent22d1a35da0e247a006c286842a1846acb4ffed4f (diff)
downloadlinux-2cf0966683430b6468f36ca20515a33ca7f2403c.tar.xz
make SYSCALL_DEFINE<n>-generated wrappers do asmlinkage_protect
... and switch i386 to HAVE_SYSCALL_WRAPPERS, killing open-coded uses of asmlinkage_protect() in a bunch of syscalls. Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/syscalls.h')
-rw-r--r--include/linux/syscalls.h6
1 files changed, 5 insertions, 1 deletions
diff --git a/include/linux/syscalls.h b/include/linux/syscalls.h
index 3b6fc13cb46a..9660a8bdcbbe 100644
--- a/include/linux/syscalls.h
+++ b/include/linux/syscalls.h
@@ -99,6 +99,7 @@ struct sigaltstack;
#define __TYPE_IS_LL(t) (__same_type((t)0, 0LL) || __same_type((t)0, 0ULL))
#define __SC_LONG(t, a) __typeof(__builtin_choose_expr(__TYPE_IS_LL(t), 0LL, 0L)) a
#define __SC_CAST(t, a) (t) a
+#define __SC_ARGS(t, a) a
#define __SC_TEST(t, a) (void)BUILD_BUG_ON_ZERO(!__TYPE_IS_LL(t) && sizeof(t) > sizeof(long))
#ifdef CONFIG_FTRACE_SYSCALLS
@@ -200,13 +201,16 @@ extern struct trace_event_functions exit_syscall_print_funcs;
#define SYSCALL_DEFINE(name) static inline long SYSC_##name
+#define __PROTECT(...) asmlinkage_protect(__VA_ARGS__)
#define __SYSCALL_DEFINEx(x, name, ...) \
asmlinkage long sys##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
static inline long SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__)); \
asmlinkage long SyS##name(__MAP(x,__SC_LONG,__VA_ARGS__)) \
{ \
+ long ret = SYSC##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \
__MAP(x,__SC_TEST,__VA_ARGS__); \
- return SYSC##name(__MAP(x,__SC_CAST,__VA_ARGS__)); \
+ __PROTECT(x, ret,__MAP(x,__SC_ARGS,__VA_ARGS__)); \
+ return ret; \
} \
SYSCALL_ALIAS(sys##name, SyS##name); \
static inline long SYSC##name(__MAP(x,__SC_DECL,__VA_ARGS__))