diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/kmi/uapi.h | 146 |
1 files changed, 76 insertions, 70 deletions
diff --git a/include/kmi/uapi.h b/include/kmi/uapi.h index 1ec69db..ad4369f 100644 --- a/include/kmi/uapi.h +++ b/include/kmi/uapi.h @@ -158,21 +158,27 @@ struct sys_ret { /** * Helper macro for defining syscall with zero arguments. * + * Note the \c __noinline attribute, might seem weird but turned out + * that gcc liked to inline all system calls into handle_syscall(), + * which seems to add quite a bit of moving registers around and spilling + * into memory. Forcing the syscalls to not be inlined removed this + * overhead and sped things up by ~7 %. + * * @param name Name of syscall. */ -#define SYSCALL_DEFINE0(name) \ - static inline void __##name(struct tcb *t); \ - void sys_##name(struct tcb *t, sys_arg_t a, sys_arg_t b, \ - sys_arg_t c, \ - sys_arg_t d, sys_arg_t e) \ - { \ - UNUSED(a); \ - UNUSED(b); \ - UNUSED(c); \ - UNUSED(d); \ - UNUSED(e); \ - __##name(t); \ - } \ +#define SYSCALL_DEFINE0(name) \ + static inline void __##name(struct tcb *t); \ + void __noinline sys_##name(struct tcb *t, sys_arg_t a, sys_arg_t b, \ + sys_arg_t c, \ + sys_arg_t d, sys_arg_t e) \ + { \ + UNUSED(a); \ + UNUSED(b); \ + UNUSED(c); \ + UNUSED(d); \ + UNUSED(e); \ + __##name(t); \ + } \ static inline void __##name /** @@ -180,18 +186,18 @@ struct sys_ret { * * @param name Name of syscall. */ -#define SYSCALL_DEFINE1(name) \ - static inline void __##name(struct tcb *, sys_arg_t); \ - void sys_##name(struct tcb *t, sys_arg_t a, sys_arg_t b, \ - sys_arg_t c, \ - sys_arg_t d, sys_arg_t e) \ - { \ - UNUSED(b); \ - UNUSED(c); \ - UNUSED(d); \ - UNUSED(e); \ - __##name(t, a); \ - } \ +#define SYSCALL_DEFINE1(name) \ + static inline void __##name(struct tcb *, sys_arg_t); \ + void __noinline sys_##name(struct tcb *t, sys_arg_t a, sys_arg_t b, \ + sys_arg_t c, \ + sys_arg_t d, sys_arg_t e) \ + { \ + UNUSED(b); \ + UNUSED(c); \ + UNUSED(d); \ + UNUSED(e); \ + __##name(t, a); \ + } \ static inline void __##name /** @@ -199,18 +205,18 @@ struct sys_ret { * * @param name Name of syscall. */ -#define SYSCALL_DEFINE2(name) \ - static inline void __##name(struct tcb *, sys_arg_t, \ - sys_arg_t); \ - void sys_##name(struct tcb *t, sys_arg_t a, sys_arg_t b, \ - sys_arg_t c, \ - sys_arg_t d, sys_arg_t e) \ - { \ - UNUSED(c); \ - UNUSED(d); \ - UNUSED(e); \ - __##name(t, a, b); \ - } \ +#define SYSCALL_DEFINE2(name) \ + static inline void __##name(struct tcb *, sys_arg_t, \ + sys_arg_t); \ + void __noinline sys_##name(struct tcb *t, sys_arg_t a, sys_arg_t b, \ + sys_arg_t c, \ + sys_arg_t d, sys_arg_t e) \ + { \ + UNUSED(c); \ + UNUSED(d); \ + UNUSED(e); \ + __##name(t, a, b); \ + } \ static inline void __##name /** @@ -218,18 +224,18 @@ struct sys_ret { * * @param name Name of syscall. */ -#define SYSCALL_DEFINE3(name) \ - static inline void __##name(struct tcb *, sys_arg_t, \ - sys_arg_t, \ - sys_arg_t); \ - void sys_##name(struct tcb *t, sys_arg_t a, sys_arg_t b, \ - sys_arg_t c, \ - sys_arg_t d, sys_arg_t e) \ - { \ - UNUSED(d); \ - UNUSED(e); \ - __##name(t, a, b, c); \ - } \ +#define SYSCALL_DEFINE3(name) \ + static inline void __##name(struct tcb *, sys_arg_t, \ + sys_arg_t, \ + sys_arg_t); \ + void __noinline sys_##name(struct tcb *t, sys_arg_t a, sys_arg_t b, \ + sys_arg_t c, \ + sys_arg_t d, sys_arg_t e) \ + { \ + UNUSED(d); \ + UNUSED(e); \ + __##name(t, a, b, c); \ + } \ static inline void __##name /** @@ -237,17 +243,17 @@ struct sys_ret { * * @param name Name of syscall. */ -#define SYSCALL_DEFINE4(name) \ - static inline void __##name(struct tcb *, sys_arg_t, \ - sys_arg_t, sys_arg_t, \ - sys_arg_t); \ - void sys_##name(struct tcb *t, sys_arg_t a, sys_arg_t b, \ - sys_arg_t c, \ - sys_arg_t d, sys_arg_t e) \ - { \ - UNUSED(e); \ - __##name(t, a, b, c, d); \ - } \ +#define SYSCALL_DEFINE4(name) \ + static inline void __##name(struct tcb *, sys_arg_t, \ + sys_arg_t, sys_arg_t, \ + sys_arg_t); \ + void __noinline sys_##name(struct tcb *t, sys_arg_t a, sys_arg_t b, \ + sys_arg_t c, \ + sys_arg_t d, sys_arg_t e) \ + { \ + UNUSED(e); \ + __##name(t, a, b, c, d); \ + } \ static inline void __##name /** @@ -255,16 +261,16 @@ struct sys_ret { * * @param name Name of syscall. */ -#define SYSCALL_DEFINE5(name) \ - static inline void __##name(struct tcb *, sys_arg_t, \ - sys_arg_t, sys_arg_t, \ - sys_arg_t, sys_arg_t); \ - void sys_##name(struct tcb *t, sys_arg_t a, sys_arg_t b, \ - sys_arg_t c, \ - sys_arg_t d, sys_arg_t e) \ - { \ - __##name(t, a, b, c, d, e); \ - } \ +#define SYSCALL_DEFINE5(name) \ + static inline void __##name(struct tcb *, sys_arg_t, \ + sys_arg_t, sys_arg_t, \ + sys_arg_t, sys_arg_t); \ + void __noinline sys_##name(struct tcb *t, sys_arg_t a, sys_arg_t b, \ + sys_arg_t c, \ + sys_arg_t d, sys_arg_t e) \ + { \ + __##name(t, a, b, c, d, e); \ + } \ static void __##name /** @name Misc syscalls. */ |