__ucontext
int sigreturn(const struct __ucontext *);
struct __ucontext;
struct __ucontext;
typedef int (__sys_sigreturn_t)(const struct __ucontext *);
typedef int (__sys_getcontext_t)(struct __ucontext *);
typedef int (__sys_setcontext_t)(const struct __ucontext *);
typedef int (__sys_swapcontext_t)(struct __ucontext *, const struct __ucontext *);
int __sys_sigreturn(const struct __ucontext * sigcntxp);
int __sys_getcontext(struct __ucontext * ucp);
int __sys_setcontext(const struct __ucontext * ucp);
int __sys_swapcontext(struct __ucontext * oucp, const struct __ucontext * ucp);
struct __ucontext *ucp;
struct __ucontext *oucp;
struct __ucontext *uc_link;
char sigcntxp_l_[PADL_(const struct __ucontext *)]; const struct __ucontext * sigcntxp; char sigcntxp_r_[PADR_(const struct __ucontext *)];
char ucp_l_[PADL_(struct __ucontext *)]; struct __ucontext * ucp; char ucp_r_[PADR_(struct __ucontext *)];
char ucp_l_[PADL_(const struct __ucontext *)]; const struct __ucontext * ucp; char ucp_r_[PADR_(const struct __ucontext *)];
char oucp_l_[PADL_(struct __ucontext *)]; struct __ucontext * oucp; char oucp_r_[PADR_(struct __ucontext *)];
char ucp_l_[PADL_(const struct __ucontext *)]; const struct __ucontext * ucp; char ucp_r_[PADR_(const struct __ucontext *)];