1/* $NetBSD: sigcode.S,v 1.5 2016/07/27 09:32:35 skrll Exp $ */ 2 3#include "opt_compat_netbsd.h" 4#include "opt_compat_ultrix.h" 5#include "opt_compat_linux.h" 6 7#include <mips/signal.h> 8#include <sys/syscall.h> 9#ifdef COMPAT_ULTRIX 10#include <compat/ultrix/ultrix_syscall.h> 11#endif 12#ifdef COMPAT_LINUX 13#include <compat/linux/linux_syscall.h> 14#endif 15 16#include <mips/asm.h> 17 18RCSID("$NetBSD: sigcode.S,v 1.5 2016/07/27 09:32:35 skrll Exp $") 19 20#include "assym.h" 21 22 .set noreorder 23 24#ifdef COMPAT_16 25/* 26 * This code is copied the user's stack for returning from signal handlers 27 * (see sendsig() and sigreturn()). We have to compute the address 28 * of the sigcontext struct for the sigreturn call. 29 * 30 * NB: we cannot profile sigcode(), it executes from userspace. 31 */ 32LEAF_NOPROFILE(sigcode) 33 move a0, sp # address of sigcontext 34 li v0, SYS_compat_16___sigreturn14 # sigreturn(scp) 35 syscall 36 break 0 # just in case sigreturn fails 37END(sigcode) 38XLEAF(esigcode) 39#endif 40 41#ifdef COMPAT_ULTRIX 42LEAF_NOPROFILE(ultrix_sigcode) 43 move a0, sp # address of sigcontext 44 li v0, ULTRIX_SYS_sigreturn # sigreturn(scp) 45 syscall 46 break 0 # just in case sigreturn fails 47END(ultrix_sigcode) 48XLEAF(ultrix_esigcode) 49#endif 50 51#ifdef COMPAT_LINUX 52#define SYSCALL_SHIFT 4000 # 4000 shift as in linux_syscall.c 53LEAF_NOPROFILE(linux_sigcode) 54 move a0, sp # address of sigcontext 55 li v0, LINUX_SYS_sigreturn + SYSCALL_SHIFT # sigreturn(sf) 56 syscall 57 break 0 # just in case sigreturn fails 58END(linux_sigcode) 59XLEAF(linux_esigcode) 60#undef SYSCALL_SHIFT 61#endif 62