catch SIGSEGV in sig caught (#119)

In the RISC-V extension instruction set, there are cases where cores from different manufacturers and different functional extension instructions share the same op. In such situations, it is necessary to add SIGSEGV handling to prevent program termination.

ruapu.h

@@ -82,37 +82,39 @@ static int ruapu_detect_isa(ruapu_some_inst some_inst)
 #include <signal.h>
 #include <setjmp.h>
 
-static int g_ruapu_sigill_caught = 0;
+static int g_ruapu_sig_caught = 0;
 static sigjmp_buf g_ruapu_jmpbuf;
 
-static void ruapu_catch_sigill(int signo, siginfo_t* si, void* data)
+static void ruapu_catch_sig(int signo, siginfo_t* si, void* data)
 {
     (void)signo;
     (void)si;
     (void)data;
 
-    g_ruapu_sigill_caught = 1;
+    g_ruapu_sig_caught = 1;
     siglongjmp(g_ruapu_jmpbuf, -1);
 }
 
 static int ruapu_detect_isa(ruapu_some_inst some_inst)
 {
-    g_ruapu_sigill_caught = 0;
+    g_ruapu_sig_caught = 0;
 
     struct sigaction sa = { 0 };
     struct sigaction old_sa;
     sa.sa_flags = SA_ONSTACK | SA_RESTART | SA_SIGINFO;
-    sa.sa_sigaction = ruapu_catch_sigill;
+    sa.sa_sigaction = ruapu_catch_sig;
     sigaction(SIGILL, &sa, &old_sa);
+    sigaction(SIGSEGV, &sa, &old_sa);
 
     if (sigsetjmp(g_ruapu_jmpbuf, 1) == 0)
     {
         some_inst();
     }
 
     sigaction(SIGILL, &old_sa, NULL);
+    sigaction(SIGSEGV, &old_sa, NULL);
 
-    return g_ruapu_sigill_caught ? 0 : 1;
+    return g_ruapu_sig_caught ? 0 : 1;
 }
 
 #elif defined __SYTERKIT__