diff options
Diffstat (limited to 'include/linux/regset.h')
| -rw-r--r-- | include/linux/regset.h | 51 |
1 files changed, 51 insertions, 0 deletions
diff --git a/include/linux/regset.h b/include/linux/regset.h index af57c1db1924..f6125a7d949d 100644 --- a/include/linux/regset.h +++ b/include/linux/regset.h @@ -17,6 +17,52 @@ struct task_struct; struct user_regset; +struct membuf { + void *p; + size_t left; +}; + +static inline int membuf_zero(struct membuf *s, size_t size) +{ + if (s->left) { + if (size > s->left) + size = s->left; + memset(s->p, 0, size); + s->p += size; + s->left -= size; + } + return s->left; +} + +static inline int membuf_write(struct membuf *s, const void *v, size_t size) +{ + if (s->left) { + if (size > s->left) + size = s->left; + memcpy(s->p, v, size); + s->p += size; + s->left -= size; + } + return s->left; +} + +/* current s->p must be aligned for v; v must be a scalar */ +#define membuf_store(s, v) \ +({ \ + struct membuf *__s = (s); \ + if (__s->left) { \ + typeof(v) __v = (v); \ + size_t __size = sizeof(__v); \ + if (unlikely(__size > __s->left)) { \ + __size = __s->left; \ + memcpy(__s->p, &__v, __size); \ + } else { \ + *(typeof(__v + 0) *)__s->p = __v; \ + } \ + __s->p += __size; \ + __s->left -= __size; \ + } \ + __s->left;}) /** * user_regset_active_fn - type of @active function in &struct user_regset @@ -57,6 +103,10 @@ typedef int user_regset_get_fn(struct task_struct *target, unsigned int pos, unsigned int count, void *kbuf, void __user *ubuf); +typedef int user_regset_get2_fn(struct task_struct *target, + const struct user_regset *regset, + struct membuf to); + /** * user_regset_set_fn - type of @set function in &struct user_regset * @target: thread being examined @@ -186,6 +236,7 @@ typedef unsigned int user_regset_get_size_fn(struct task_struct *target, */ struct user_regset { user_regset_get_fn *get; + user_regset_get2_fn *regset_get; user_regset_set_fn *set; user_regset_active_fn *active; user_regset_writeback_fn *writeback; |