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o Remove vm_map_growstack() and useracc() from sendsig(). Copyout() and

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suword() will automatically grow the stack if needed.
 o Add a comment that osigreturn() and sigreturn() are MPSAFE.
This commit is contained in:
Alan Cox 2002-04-13 19:17:49 +00:00
parent 8da9a6b0c5
commit 80eef17ba9
1 changed files with 5 additions and 20 deletions
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25
sys/sparc64/sparc64/machdep.c
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@ -379,27 +379,7 @@ sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code)
sfp = (struct sigframe *)sp - 1;
PROC_UNLOCK(p);
/*
* vm_map_growstack() will fail if *sfp does not fit inside the stack
* and the stack can not be grown.
* useracc() will return FALSE if access is denied.
*/
fp = (struct frame *)sfp - 1;
if (vm_map_growstack(p, (u_long)fp) != KERN_SUCCESS ||
!useracc((caddr_t)fp, sizeof(*fp) + sizeof(*sfp), VM_PROT_WRITE)) {
/*
* Process has trashed its stack; give it an illegal
* instruction to halt it in its tracks.
*/
CTR2(KTR_SIG, "sendsig: trashed stack td=%p sfp=%p", td, sfp);
PROC_LOCK(p);
SIGACTION(p, SIGILL) = SIG_DFL;
SIGDELSET(p->p_sigignore, SIGILL);
SIGDELSET(p->p_sigcatch, SIGILL);
SIGDELSET(p->p_sigmask, SIGILL);
psignal(p, SIGILL);
return;
}
/* Translate the signal if appropriate. */
if (p->p_sysent->sv_sigtbl && sig <= p->p_sysent->sv_sigsize)
@ -452,6 +432,8 @@ sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code)
* Stub to satisfy the reference to osigreturn in the syscall table. This
* is needed even for newer arches that don't support old signals because
* the syscall table is machine-independent.
*
* MPSAFE
*/
int
osigreturn(struct thread *td, struct osigreturn_args *uap)
@ -466,6 +448,9 @@ struct sigreturn_args {
};
#endif
/*
* MPSAFE
*/
int
sigreturn(struct thread *td, struct sigreturn_args *uap)
{