CVS: sml-dist/src/runtime/mach-dep signal-sysdep.h,1.12,1.13

Update of /cvsroot/smlnj/sml-dist/src/runtime/mach-dep
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv620/src/runtime/mach-dep

Modified Files:
	signal-sysdep.h 
Log Message:
  NetBSD patches for version 3.x (provided by Cary Gray)


Index: signal-sysdep.h
===================================================================
RCS file: /cvsroot/smlnj/sml-dist/src/runtime/mach-dep/signal-sysdep.h,v
retrieving revision 1.12
retrieving revision 1.13
diff -C2 -d -r1.12 -r1.13
*** signal-sysdep.h	6 Feb 2006 22:04:00 -0000	1.12
--- signal-sysdep.h	10 Feb 2006 22:14:58 -0000	1.13
***************
*** 463,485 ****
       typedef void SigReturn_t;
  
! #  elif defined(OPSYS_NETBSD)
!     /** x86, NetBSD **/
! /* NetBSD (including versions 1.0 and 1.1) generates SIGBUS rather
!    than SIGFPE for overflows.  The real fix is a trivial change to
!    kernel sources, which has already been reported (NetBSD internal
!    problem identification "port-i386/1833"). 
! 
!    If you want to fix this on your NetBSD system.  Edit machdep.c in
!    directory /sys/arch/i386/i386, and find the line
! 
!         setgate(&idt[  4], &IDTVEC(ofl),     0, SDT_SYS386TGT, SEL_KPL);
! 
!    Change SEL_KPL to SEL_UPL.  With SEL_KPL, the int overflow trap is
!    not accessible at user level, and a protection fault occurs instead
!    (thus the seg fault).  SEL_UPL will allow user processes to generate
!    this trap.
! 
!    For the change to take effect, recompile your kernel, install it
!    and reboot. */
  #    define SIG_FAULT1		SIGFPE
  #    define SIG_FAULT2		SIGBUS
--- 463,468 ----
       typedef void SigReturn_t;
  
! #  elif defined(OPSYS_NETBSD2)
!     /** x86, NetBSD (version 2.x) **/
  #    define SIG_FAULT1		SIGFPE
  #    define SIG_FAULT2		SIGBUS
***************
*** 494,497 ****
--- 477,492 ----
       typedef void SigReturn_t;
  
+ #  elif defined(OPSYS_NETBSD)
+     /** x86, NetBSD (version 3.x) **/
+ #    define SIG_FAULT1		SIGFPE
+ #    define SIG_FAULT2		SIGBUS
+ #    define INT_DIVZERO(s, c)	0
+ #    define INT_OVFLW(s, c)	(((s) == SIGFPE) || ((s) == SIGBUS))
+ 
+ #    define SIG_GetCode(info, scp)	(info)
+ #    define SIG_GetPC(scp)		(_UC_MACHINE_PC(scp))
+ #    define SIG_SetPC(scp, addr)	{ _UC_MACHINE_SET_PC(scp, ((long) (addr))); }
+ #    define SIG_ZeroLimitPtr(scp)	{ ML_X86Frame[LIMITPTR_X86OFFSET] = 0; }
+ 
  #  elif defined(OPSYS_SOLARIS)
       /** x86, Solaris */



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