1 files changed, 0 insertions, 99 deletions
diff --git a/libc/i386sys/signal.c b/libc/i386sys/signal.c
deleted file mode 100644
index dad3389..0000000
--- a/libc/i386sys/signal.c
+++ /dev/null
@@ -1,99 +0,0 @@
-
-#ifndef __MSDOS__
-#ifdef __AS386_16__
-
-#include <errno.h>
-#include <signal.h>
-
-typedef __sighandler_t Sig;
-
-extern int __signal __P((int, __sighandler_t));
-static Sig system_signal();
-
-Sig __sigtable[_NSIG-1];
-
-/*
- * Signal handler.
- *
- */
-
-/*
- * KERNEL INTERFACE:
- *   It is assumed the kernel will never give us a signal we haven't
- *   _explicitly_ asked for!
- *
- * The Kernel need only save space for _one_ function pointer
- * (to system_signal) and must deal with SIG_DFL and SIG_IGN
- * in kernel space.
- *
- * When a signal is required the kernel must set all the registers as if
- * returning from a interrupt normally then push the number of the signal
- * to be generated, push the current pc value, then set the pc to the
- * address of the 'system_signal' function.
- */
-
-Sig
-signal(number, pointer)
-int number;
-Sig pointer;
-{
-   Sig old_sig;
-   int rv;
-   if( number < 1 || number >= _NSIG ) { errno=EINVAL; return SIG_ERR; }
-
-   if( pointer == SIG_DFL || pointer == SIG_IGN )
-      rv = __signal(number, pointer);
-   else
-      rv = __signal(number, (__sighandler_t) system_signal);
-
-   if( rv < 0 ) return SIG_ERR;
-
-   old_sig = __sigtable[number-1];
-   __sigtable[number-1] = pointer;
-
-   switch(rv)
-   {
-   case 0: return SIG_DFL;
-   case 1: return SIG_IGN;
-   return old_sig;
-   }
-}
-
-#asm
-  .text
-_system_signal:		! When this is called by the kernel the stack contains
-  pushf			! in order:
-  push	ax		! 
-  push	bx		!    The signal number,			(NOS)
-  push	cx		!    The program counter,		(TOS)
-  push	dx		!
-  push	si		! It does NOT contain the CS register or the flags.
-  push	di		! This means it cannot be unraveled by an iret.
-  push	bp
-  push	es		! Note also only ES segment register is saved.
-  mov	bx,sp		! Unlike minix the rv from a system call is in AX.
-  mov	bx,[bx+20]
-#if __FIRST_ARG_IN_AX__
-  mov	ax,bx
-#else
-  push	bx		! NB this is _unchecked_, do we want to ?
-#endif
-  add	bx,bx
-  mov	bx,[bx+___sigtable-2]	! Offset by 2 cause no entry for signal 0
-  call	bx		! Do we want to check BX for 0 or 1 ?
-  inc	sp
-  inc	sp
-  pop	es
-  pop	bp
-  pop	di
-  pop	si
-  pop	dx
-  pop	cx
-  pop	bx
-  pop	ax
-  popf
-  ret	#2		! Get rid of the signum too.
-#endasm
-
-#endif /* __AS386_16__ */
-#endif /* __MSDOS__ */