Import Dev86-0.0.4.tar.gzv0.0.4

1 files changed, 36 insertions, 0 deletions

diff --git a/elksemu/elks_signal.c b/elksemu/elks_signal.c
new file mode 100644
index 0000000..2bf1e55
--- /dev/null
+++ b/elksemu/elks_signal.c
@@ -0,0 +1,36 @@
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <fcntl.h>
+#include <signal.h>
+#include <sys/stat.h>
+#include <sys/vm86.h>
+#include "elks.h" 
+
+static int elks_sigtrap= -1;
+
+void sig_trap(int signo)
+{
+   elks_cpu.regs.esp -= 2;
+   ELKS_POKE(unsigned short, elks_cpu.regs.esp, signo);
+   elks_cpu.regs.esp -= 2;
+   ELKS_POKE(unsigned short, elks_cpu.regs.esp, elks_cpu.regs.eip);
+   elks_cpu.regs.eip = elks_sigtrap;
+}
+
+int elks_signal(int bx,int cx,int dx,int di,int si)
+{
+   int rv;
+   if( bx < 0 || bx >= NSIG ) { errno = EINVAL; return -1; }
+   if( cx == 0 )      rv = (signal(bx, SIG_DFL) == SIG_ERR);
+   else if( cx == 1 ) rv = (signal(bx, SIG_IGN) == SIG_ERR);
+   else 
+   {
+      elks_sigtrap = cx;
+      rv = (signal(bx, sig_trap) == SIG_ERR);
+   }
+
+   return -rv;
+}