Add a "fork" of musl as //fusl.

fusl/arch/mips/bits/signal.h

+#if defined(_POSIX_SOURCE) || defined(_POSIX_C_SOURCE) \
+ || defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+#define MINSIGSTKSZ 2048
+#define SIGSTKSZ 8192
+#endif
+
+#if defined(_GNU_SOURCE) || defined(_BSD_SOURCE)
+typedef unsigned long long greg_t, gregset_t[32];
+typedef struct {
+        union {
+                double fp_dregs[32];
+                struct {
+                        float _fp_fregs;
+                        unsigned _fp_pad;
+                } fp_fregs[32];
+        } fp_r;
+} fpregset_t;
+struct sigcontext
+{
+        unsigned sc_regmask, sc_status;
+        unsigned long long sc_pc, sc_regs[32], sc_fpregs[32];
+        unsigned sc_ownedfp, sc_fpc_csr, sc_fpc_eir, sc_used_math, sc_dsp;
+        unsigned long long sc_mdhi, sc_mdlo;
+        unsigned long sc_hi1, sc_lo1, sc_hi2, sc_lo2, sc_hi3, sc_lo3;
+};
+typedef struct
+{
+        unsigned regmask, status;
+        unsigned long long pc, gregs[32], fpregs[32];
+        unsigned ownedfp, fpc_csr, fpc_eir, used_math, dsp;
+        unsigned long long mdhi, mdlo;
+        unsigned long hi1, lo1, hi2, lo2, hi3, lo3;
+} mcontext_t;
+#else
+typedef struct {
+        unsigned __mc1[2];
+        unsigned long long __mc2[65];
+        unsigned __mc3[5];
+        unsigned long long __mc4[2];
+        unsigned __mc5[6];
+} mcontext_t;
+#endif
+
+struct sigaltstack {
+        void *ss_sp;
+        size_t ss_size;
+        int ss_flags;
+};
+
+typedef struct __ucontext {
+        unsigned long uc_flags;
+        struct __ucontext *uc_link;
+        stack_t uc_stack;
+        mcontext_t uc_mcontext;
+        sigset_t uc_sigmask;
+} ucontext_t;
+
+#define SA_NOCLDSTOP  1
+#define SA_NOCLDWAIT  0x10000
+#define SA_SIGINFO    8
+#define SA_ONSTACK    0x08000000
+#define SA_RESTART    0x10000000
+#define SA_NODEFER    0x40000000
+#define SA_RESETHAND  0x80000000
+#define SA_RESTORER   0x04000000
+
+#undef SIG_BLOCK
+#undef SIG_UNBLOCK
+#undef SIG_SETMASK
+#define SIG_BLOCK     1
+#define SIG_UNBLOCK   2
+#define SIG_SETMASK   3
+
+#endif
+
+#define SIGHUP    1
+#define SIGINT    2
+#define SIGQUIT   3
+#define SIGILL    4
+#define SIGTRAP   5
+#define SIGABRT   6
+#define SIGIOT    SIGABRT
+#define SIGSTKFLT 7
+#define SIGFPE    8
+#define SIGKILL   9
+#define SIGBUS    10
+#define SIGSEGV   11
+#define SIGSYS    12
+#define SIGPIPE   13
+#define SIGALRM   14
+#define SIGTERM   15
+#define SIGUSR1   16
+#define SIGUSR2   17
+#define SIGCHLD   18
+#define SIGPWR    19
+#define SIGWINCH  20
+#define SIGURG    21
+#define SIGIO     22
+#define SIGPOLL   SIGIO
+#define SIGSTOP   23
+#define SIGTSTP   24
+#define SIGCONT   25
+#define SIGTTIN   26
+#define SIGTTOU   27
+#define SIGVTALRM 28
+#define SIGPROF   29
+#define SIGXCPU   30
+#define SIGXFSZ   31
+#define SIGUNUSED SIGSYS
+
+#define _NSIG 128