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Attempt to make the proper changes here for the proc.h commit:

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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.

which left out SVR4 bits.
This commit is contained in:
David E. O'Brien 2004-01-05 00:29:00 +00:00
parent c990f469a7
commit c53cdbeb95
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=124141
1 changed files with 5 additions and 5 deletions
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10
sys/i386/svr4/svr4_machdep.c
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@ -206,7 +206,7 @@ svr4_setcontext(td, uc)
#if defined(DONE_MORE_SIGALTSTACK_WORK)
psp = p->p_sigacts;
#endif
sf = &p->p_sigstk;
sf = &td->td_sigstk;
/*
* XXX:
@ -437,11 +437,11 @@ svr4_sendsig(catcher, sig, mask, 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 svr4_sigframe *)(p->p_sigstk.ss_sp +
p->p_sigstk.ss_size - sizeof(struct svr4_sigframe));
p->p_sigstk.ss_flags |= SS_ONSTACK;
fp = (struct svr4_sigframe *)(td->td_sigstk.ss_sp +
td->td_sigstk.ss_size - sizeof(struct svr4_sigframe));
td->td_sigstk.ss_flags |= SS_ONSTACK;
} else {
fp = (struct svr4_sigframe *)tf->tf_esp - 1;
}