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sigcode.S revision 1.2 
      1 /*	$NetBSD: sigcode.S,v 1.2 2003/10/29 23:39:45 christos Exp $	*/
      2 
      3 #include "opt_compat_netbsd.h"
      4 #include "opt_compat_ultrix.h"
      5 #include "opt_compat_linux.h"
      6 #include "opt_compat_irix.h"
      7 
      8 #include <mips/signal.h>
      9 #include <sys/syscall.h>
     10 #ifdef COMPAT_ULTRIX
     11 #include <compat/ultrix/ultrix_syscall.h>
     12 #endif
     13 #ifdef COMPAT_LINUX
     14 #include <compat/linux/linux_syscall.h>
     15 #endif
     16 #ifdef COMPAT_IRIX
     17 #include <compat/irix/irix_syscall.h>
     18 #endif
     19 
     20 #include <mips/asm.h>
     21 #include "assym.h"
     22 
     23 	.set	noreorder
     24 
     25 #ifdef COMPAT_16
     26 /*
     27  * This code is copied the user's stack for returning from signal handlers
     28  * (see sendsig() and sigreturn()). We have to compute the address
     29  * of the sigcontext struct for the sigreturn call.
     30  *
     31  * NB: we cannot profile sigcode(), it executes from userspace.
     32  */
     33 LEAF_NOPROFILE(sigcode)
     34 	move	a0, sp			# address of sigcontext
     35 	li	v0, SYS_compat_16___sigreturn14	# sigreturn(scp)
     36 	syscall
     37 	break	0			# just in case sigreturn fails
     38 END(sigcode)
     39 XLEAF(esigcode)
     40 #endif
     41 
     42 #ifdef COMPAT_ULTRIX
     43 LEAF_NOPROFILE(ultrix_sigcode)
     44 	move	a0, sp			# address of sigcontext
     45 	li	v0, ULTRIX_SYS_sigreturn	# sigreturn(scp)
     46 	syscall
     47 	break	0			# just in case sigreturn fails
     48 END(ultrix_sigcode)
     49 XLEAF(ultrix_esigcode)
     50 #endif
     51 
     52 #ifdef COMPAT_LINUX
     53 #define SYSCALL_SHIFT 4000		# 4000 shift as in linux_syscall.c
     54 LEAF_NOPROFILE(linux_sigcode)
     55 	move	a0, sp			# address of sigcontext
     56 	li	v0, LINUX_SYS_sigreturn	+ SYSCALL_SHIFT # sigreturn(sf)
     57 	syscall
     58 	break	0			# just in case sigreturn fails
     59 END(linux_sigcode)
     60 XLEAF(linux_esigcode)
     61 #undef SYSCALL_SHIFT
     62 #endif
     63