123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133 |
- #include <errno.h>
- #include <signal.h>
- #include <string.h>
- #include <sys/syscall.h>
- #include <bits/kernel_sigaction.h>
- #define SA_RESTORER 0x04000000
- extern __typeof(sigaction) __libc_sigaction;
- #ifdef __NR_rt_sigaction
- # if _MIPS_SIM != _ABIO32
- # ifdef __NR_rt_sigreturn
- static void restore_rt(void) __asm__ ("__restore_rt");
- # endif
- # ifdef __NR_sigreturn
- static void restore(void) __asm__ ("__restore");
- # endif
- # endif
- int __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
- {
- # if _MIPS_SIM != _ABIO32
- struct sigaction kact;
- if (act) {
- memcpy(&kact, act, sizeof(kact));
- kact.sa_restorer = &restore_rt;
- act = &kact;
- }
- # endif
-
- return __syscall_rt_sigaction(sig, act, oact, sizeof(act->sa_mask));
- }
- #else
- extern void restore(void) __asm__ ("__restore") attribute_hidden;
- int __libc_sigaction(int sig, const struct sigaction *act, struct sigaction *oact)
- {
- int result;
- struct old_kernel_sigaction kact, koact;
- if (act) {
- kact.k_sa_handler = act->sa_handler;
- kact.sa_mask = act->sa_mask.__val[0];
- kact.sa_flags = act->sa_flags;
- # if _MIPS_SIM == _ABIO32
- kact.sa_restorer = act->sa_restorer;
- # else
- kact.sa_restorer = &restore_rt;
- # endif
- }
- result = __syscall_sigaction(sig,
- act ? &kact : NULL,
- oact ? &koact : NULL);
- if (result < 0) {
- __set_errno(-result);
- return -1;
- }
- if (oact) {
- oact->sa_handler = koact.k_sa_handler;
- oact->sa_mask.__val[0] = koact.sa_mask;
- oact->sa_flags = koact.sa_flags;
- oact->sa_restorer = koact.sa_restorer;
- }
- return result;
- }
- #endif
- #ifndef LIBC_SIGACTION
- weak_alias(__libc_sigaction,sigaction)
- libc_hidden_weak(sigaction)
- #endif
- #define RESTORE(name, syscall) RESTORE2(name, syscall)
- #define RESTORE2(name, syscall) \
- __asm__ ( \
- ".align 4\n" \
- "__" #name ":\n" \
- " li $2, " #syscall "\n" \
- " syscall\n" \
- );
- #if _MIPS_SIM != _ABIO32
- # ifdef __NR_rt_sigreturn
- RESTORE(restore_rt, __NR_rt_sigreturn)
- # endif
- # ifdef __NR_sigreturn
- RESTORE(restore, __NR_sigreturn)
- # endif
- #endif
|