diff options
| author | davidxu <davidxu@FreeBSD.org> | 2004-01-03 02:02:26 +0000 |
|---|---|---|
| committer | davidxu <davidxu@FreeBSD.org> | 2004-01-03 02:02:26 +0000 |
| commit | f39653dda8a5ba30d080c073e76f4065a6bf4b48 (patch) | |
| tree | 14d49d69e2829a6224271d42946d9bec5a5f9ada /sys/i386/linux/linux_sysvec.c | |
| parent | 5b9bbee08a34c013ab6b7b6432dd37835012f868 (diff) | |
| download | FreeBSD-src-f39653dda8a5ba30d080c073e76f4065a6bf4b48.zip FreeBSD-src-f39653dda8a5ba30d080c073e76f4065a6bf4b48.tar.gz | |
Make sigaltstack as per-threaded, because per-process sigaltstack state
is useless for threaded programs, multiple threads can not share same
stack.
The alternative signal stack is private for thread, no lock is needed,
the orignal P_ALTSTACK is now moved into td_pflags and renamed to
TDP_ALTSTACK.
For single thread or Linux clone() based threaded program, there is no
semantic changed, because those programs only have one kernel thread
in every process.
Reviewed by: deischen, dfr
Diffstat (limited to 'sys/i386/linux/linux_sysvec.c')
| -rw-r--r-- | sys/i386/linux/linux_sysvec.c | 18 |
1 files changed, 9 insertions, 9 deletions
diff --git a/sys/i386/linux/linux_sysvec.c b/sys/i386/linux/linux_sysvec.c index dbaea80..5321d21 100644 --- a/sys/i386/linux/linux_sysvec.c +++ b/sys/i386/linux/linux_sysvec.c @@ -290,10 +290,10 @@ linux_rt_sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code) /* * Allocate space for the signal handler context. */ - if ((p->p_flag & P_ALTSTACK) && !oonstack && + if ((td->td_pflags & TDP_ALTSTACK) && !oonstack && SIGISMEMBER(psp->ps_sigonstack, sig)) { - fp = (struct l_rt_sigframe *)(p->p_sigstk.ss_sp + - p->p_sigstk.ss_size - sizeof(struct l_rt_sigframe)); + fp = (struct l_rt_sigframe *)(td->td_sigstk.ss_sp + + td->td_sigstk.ss_size - sizeof(struct l_rt_sigframe)); } else fp = (struct l_rt_sigframe *)regs->tf_esp - 1; mtx_unlock(&psp->ps_mtx); @@ -323,9 +323,9 @@ linux_rt_sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code) frame.sf_sc.uc_flags = 0; /* XXX ??? */ frame.sf_sc.uc_link = NULL; /* XXX ??? */ - frame.sf_sc.uc_stack.ss_sp = p->p_sigstk.ss_sp; - frame.sf_sc.uc_stack.ss_size = p->p_sigstk.ss_size; - frame.sf_sc.uc_stack.ss_flags = (p->p_flag & P_ALTSTACK) + frame.sf_sc.uc_stack.ss_sp = td->td_sigstk.ss_sp; + frame.sf_sc.uc_stack.ss_size = td->td_sigstk.ss_size; + frame.sf_sc.uc_stack.ss_flags = (td->td_pflags & TDP_ALTSTACK) ? ((oonstack) ? LINUX_SS_ONSTACK : 0) : LINUX_SS_DISABLE; PROC_UNLOCK(p); @@ -431,10 +431,10 @@ linux_sendsig(sig_t catcher, int sig, sigset_t *mask, u_long code) /* * Allocate space for the signal handler context. */ - if ((p->p_flag & P_ALTSTACK) && !oonstack && + if ((td->td_pflags & TDP_ALTSTACK) && !oonstack && SIGISMEMBER(psp->ps_sigonstack, sig)) { - fp = (struct l_sigframe *)(p->p_sigstk.ss_sp + - p->p_sigstk.ss_size - sizeof(struct l_sigframe)); + fp = (struct l_sigframe *)(td->td_sigstk.ss_sp + + td->td_sigstk.ss_size - sizeof(struct l_sigframe)); } else fp = (struct l_sigframe *)regs->tf_esp - 1; mtx_unlock(&psp->ps_mtx); |
