Replace previous by something more complete.
This commit is contained in:
pk
parent
9d9f22fa79
commit
9658554e18
@ -1,4 +1,4 @@
|
||||
/* $NetBSD: machdep.c,v 1.125 1998/09/13 12:13:50 mycroft Exp $ */
|
||||
/* $NetBSD: machdep.c,v 1.126 1998/09/13 20:17:54 pk Exp $ */
|
||||
|
||||
/*-
|
||||
* Copyright (c) 1996, 1997, 1998 The NetBSD Foundation, Inc.
|
||||
@ -82,6 +82,7 @@
|
||||
*/
|
||||
|
||||
#include "opt_uvm.h"
|
||||
#include "opt_compat_netbsd.h"
|
||||
#include "opt_compat_sunos.h"
|
||||
|
||||
#include <sys/param.h>
|
||||
@ -581,25 +582,25 @@ sendsig(catcher, sig, mask, code)
|
||||
struct sigacts *psp = p->p_sigacts;
|
||||
struct sigframe *fp;
|
||||
struct trapframe *tf;
|
||||
int addr, onstack, oldsp, newsp;
|
||||
int addr, oonstack, onstack, oldsp, newsp;
|
||||
struct sigframe sf;
|
||||
|
||||
tf = p->p_md.md_tf;
|
||||
oldsp = tf->tf_out[6];
|
||||
|
||||
/* Do we need to jump onto the signal stack? */
|
||||
onstack =
|
||||
(psp->ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 &&
|
||||
(psp->ps_sigact[sig].sa_flags & SA_ONSTACK) != 0;
|
||||
|
||||
oonstack = psp->ps_sigstk.ss_flags & SS_ONSTACK;
|
||||
/*
|
||||
* Compute new user stack addresses, subtract off
|
||||
* one signal frame, and align.
|
||||
*/
|
||||
if (onstack)
|
||||
onstack =
|
||||
(psp->ps_sigstk.ss_flags & (SS_DISABLE | SS_ONSTACK)) == 0 &&
|
||||
(psp->ps_sigact[sig].sa_flags & SA_ONSTACK) != 0;
|
||||
|
||||
if (onstack) {
|
||||
fp = (struct sigframe *)((caddr_t)psp->ps_sigstk.ss_sp +
|
||||
psp->ps_sigstk.ss_size);
|
||||
else
|
||||
psp->ps_sigstk.ss_flags |= SS_ONSTACK;
|
||||
} else
|
||||
fp = (struct sigframe *)oldsp;
|
||||
fp = (struct sigframe *)((int)(fp - 1) & ~7);
|
||||
|
||||
@ -608,7 +609,6 @@ sendsig(catcher, sig, mask, code)
|
||||
printf("sendsig: %s[%d] sig %d newusp %p scp %p\n",
|
||||
p->p_comm, p->p_pid, sig, fp, &fp->sf_sc);
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Now set up the signal frame. We build it in kernel space
|
||||
* and then copy it out. We probably ought to just build it
|
||||
@ -621,7 +621,20 @@ sendsig(catcher, sig, mask, code)
|
||||
#endif
|
||||
sf.sf_addr = 0; /* XXX */
|
||||
|
||||
/* Save register context. */
|
||||
/*
|
||||
* Build the signal context to be used by sigreturn.
|
||||
*/
|
||||
sf.sf_sc.sc_onstack = oonstack;
|
||||
sf.sf_sc.sc_mask = *mask;
|
||||
#ifdef COMPAT_13
|
||||
/*
|
||||
* XXX We always have to save an old style signal mask because
|
||||
* XXX we might be delivering a signal to a process which will
|
||||
* XXX escape from the signal in a non-standard way and invoke
|
||||
* XXX sigreturn() directly.
|
||||
*/
|
||||
native_sigset_to_sigset13(mask, &sf.sf_sc.__sc_mask13);
|
||||
#endif
|
||||
sf.sf_sc.sc_sp = oldsp;
|
||||
sf.sf_sc.sc_pc = tf->tf_pc;
|
||||
sf.sf_sc.sc_npc = tf->tf_npc;
|
||||
@ -629,22 +642,6 @@ sendsig(catcher, sig, mask, code)
|
||||
sf.sf_sc.sc_g1 = tf->tf_global[1];
|
||||
sf.sf_sc.sc_o0 = tf->tf_out[0];
|
||||
|
||||
/* Save signal stack. */
|
||||
frame.sf_sc.sc_onstack = psp->ps_sigstk.ss_flags & SS_ONSTACK;
|
||||
|
||||
/* Save signal mask. */
|
||||
frame.sf_sc.sc_mask = *mask;
|
||||
|
||||
#ifdef COMPAT_13
|
||||
/*
|
||||
* XXX We always have to save an old style signal mask because
|
||||
* XXX we might be delivering a signal to a process which will
|
||||
* XXX escape from the signal in a non-standard way and invoke
|
||||
* XXX sigreturn() directly.
|
||||
*/
|
||||
native_sigset_to_sigset13(mask, &frame.sf_sc.__sc_mask13);
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Put the stack in a consistent state before we whack away
|
||||
* at it. Note that write_user_windows may just dump the
|
||||
@ -669,34 +666,20 @@ sendsig(catcher, sig, mask, code)
|
||||
sigexit(p, SIGILL);
|
||||
/* NOTREACHED */
|
||||
}
|
||||
|
||||
#ifdef DEBUG
|
||||
if (sigdebug & SDB_FOLLOW)
|
||||
printf("sendsig: %s[%d] sig %d scp %p\n",
|
||||
p->p_comm, p->p_pid, sig, &fp->sf_sc);
|
||||
#endif
|
||||
|
||||
/*
|
||||
* Arrange to continue execution at the code copied out in exec().
|
||||
* It needs the function to call in %g1, and a new stack pointer.
|
||||
*/
|
||||
#ifdef COMPAT_SUNOS
|
||||
if (psp->ps_usertramp & sigmask(sig)) {
|
||||
addr = (int)catcher; /* user does his own trampolining */
|
||||
} else
|
||||
#endif
|
||||
{
|
||||
addr = (int)psp->ps_sigcode;
|
||||
tf->tf_global[1] = (int)catcher;
|
||||
}
|
||||
addr = (int)psp->ps_sigcode;
|
||||
tf->tf_global[1] = (int)catcher;
|
||||
tf->tf_pc = addr;
|
||||
tf->tf_npc = addr + 4;
|
||||
tf->tf_out[6] = newsp;
|
||||
|
||||
/* Remember that we're now on the signal stack. */
|
||||
if (onstack)
|
||||
psp->ps_sigstk.ss_flags |= SS_ONSTACK;
|
||||
|
||||
#ifdef DEBUG
|
||||
if ((sigdebug & SDB_KSTACK) && p->p_pid == sigpid)
|
||||
printf("sendsig: about to return to catcher\n");
|
||||
@ -714,16 +697,17 @@ sendsig(catcher, sig, mask, code)
|
||||
*/
|
||||
/* ARGSUSED */
|
||||
int
|
||||
sys_sigreturn(p, v, retval)
|
||||
sys___sigreturn14(p, v, retval)
|
||||
struct proc *p;
|
||||
void *v;
|
||||
register_t *retval;
|
||||
{
|
||||
struct sys_sigreturn_args /* {
|
||||
struct sys___sigreturn14_args /* {
|
||||
syscallarg(struct sigcontext *) sigcntxp;
|
||||
} */ *uap = v;
|
||||
struct sigcontext *scp;
|
||||
struct sigcontext sc, *scp;
|
||||
struct trapframe *tf;
|
||||
int error;
|
||||
|
||||
/* First ensure consistent stack state (see sendsig). */
|
||||
write_user_windows();
|
||||
@ -734,9 +718,76 @@ sys_sigreturn(p, v, retval)
|
||||
printf("sigreturn: %s[%d], sigcntxp %p\n",
|
||||
p->p_comm, p->p_pid, SCARG(uap, sigcntxp));
|
||||
#endif
|
||||
scp = SCARG(uap, sigcntxp);
|
||||
if ((int)scp & 3 || uvm_useracc((caddr_t)scp,sizeof *scp, B_WRITE) == 0)
|
||||
if ((error = copyin(SCARG(uap, sigcntxp), &sc, sizeof sc)) != 0)
|
||||
return (error);
|
||||
scp = ≻
|
||||
|
||||
tf = p->p_md.md_tf;
|
||||
/*
|
||||
* Only the icc bits in the psr are used, so it need not be
|
||||
* verified. pc and npc must be multiples of 4. This is all
|
||||
* that is required; if it holds, just do it.
|
||||
*/
|
||||
if (((scp->sc_pc | scp->sc_npc) & 3) != 0)
|
||||
return (EINVAL);
|
||||
|
||||
/* take only psr ICC field */
|
||||
tf->tf_psr = (tf->tf_psr & ~PSR_ICC) | (scp->sc_psr & PSR_ICC);
|
||||
tf->tf_pc = scp->sc_pc;
|
||||
tf->tf_npc = scp->sc_npc;
|
||||
tf->tf_global[1] = scp->sc_g1;
|
||||
tf->tf_out[0] = scp->sc_o0;
|
||||
tf->tf_out[6] = scp->sc_sp;
|
||||
|
||||
if (scp->sc_onstack & SS_ONSTACK)
|
||||
p->p_sigacts->ps_sigstk.ss_flags |= SS_ONSTACK;
|
||||
else
|
||||
p->p_sigacts->ps_sigstk.ss_flags &= ~SS_ONSTACK;
|
||||
|
||||
/* Restore signal mask */
|
||||
(void) sigprocmask1(p, SIG_SETMASK, &scp->sc_mask, 0);
|
||||
|
||||
return (EJUSTRETURN);
|
||||
}
|
||||
|
||||
#ifdef COMPAT_13
|
||||
/*
|
||||
* System call to cleanup state after a signal
|
||||
* has been taken. Reset signal mask and
|
||||
* stack state from context left by sendsig (above),
|
||||
* and return to the given trap frame (if there is one).
|
||||
* Check carefully to make sure that the user has not
|
||||
* modified the state to gain improper privileges or to cause
|
||||
* a machine fault.
|
||||
*/
|
||||
/* ARGSUSED */
|
||||
int
|
||||
compat_13_sys_sigreturn(p, v, retval)
|
||||
struct proc *p;
|
||||
void *v;
|
||||
register_t *retval;
|
||||
{
|
||||
struct compat_13_sys_sigreturn_args /* {
|
||||
syscallarg(struct sigcontext13 *) sigcntxp;
|
||||
} */ *uap = v;
|
||||
struct sigcontext13 sc, *scp;
|
||||
sigset_t mask;
|
||||
struct trapframe *tf;
|
||||
int error;
|
||||
|
||||
/* First ensure consistent stack state (see sendsig). */
|
||||
write_user_windows();
|
||||
if (rwindow_save(p))
|
||||
sigexit(p, SIGILL);
|
||||
#ifdef DEBUG
|
||||
if (sigdebug & SDB_FOLLOW)
|
||||
printf("sigreturn: %s[%d], sigcntxp %p\n",
|
||||
p->p_comm, p->p_pid, SCARG(uap, sigcntxp));
|
||||
#endif
|
||||
if ((error = copyin(SCARG(uap, sigcntxp), &sc, sizeof sc)) != 0)
|
||||
return (error);
|
||||
scp = ≻
|
||||
|
||||
tf = p->p_md.md_tf;
|
||||
/*
|
||||
* Only the icc bits in the psr are used, so it need not be
|
||||
@ -753,17 +804,18 @@ sys_sigreturn(p, v, retval)
|
||||
tf->tf_out[0] = scp->sc_o0;
|
||||
tf->tf_out[6] = scp->sc_sp;
|
||||
|
||||
/* Restore signal stack. */
|
||||
if (scp->sc_onstack & SS_ONSTACK)
|
||||
p->p_sigacts->ps_sigstk.ss_flags |= SS_ONSTACK;
|
||||
else
|
||||
p->p_sigacts->ps_sigstk.ss_flags &= ~SS_ONSTACK;
|
||||
|
||||
/* Restore signal mask. */
|
||||
(void) sigprocmask1(p, SIG_SETMASK, &scp->sc_mask, 0);
|
||||
/* Restore signal mask */
|
||||
native_sigset13_to_sigset(&scp->sc_mask, &mask);
|
||||
(void) sigprocmask1(p, SIG_SETMASK, &mask, 0);
|
||||
|
||||
return (EJUSTRETURN);
|
||||
}
|
||||
#endif
|
||||
|
||||
int waittime = -1;
|
||||
|
||||
|
||||
Loading…
Reference in New Issue
Block a user