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Align signal frame placed on stack to 16 bytes so that SSE FPU register

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restores can work.  Also correct allocation for signal frame size.

Reviewed by:	mini
This commit is contained in:
Daniel Eischen 2003-03-29 16:38:15 +00:00
parent e3a2085326
commit 67aba1c6a4
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=112807
1 changed files with 2 additions and 1 deletions
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3
lib/libc/i386/gen/signalcontext.c
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@ -56,7 +56,8 @@ __signalcontext(ucontext_t *ucp, int sig, __sighandler_t *func)
*/
p = (register_t *)(void *)(intptr_t)ucp->uc_mcontext.mc_esp;
*--p = (register_t)(intptr_t)ucp;
p -= sizeof(struct sigframe);
p = (register_t *)((u_register_t)p & ~0xF); /* Align to 16 bytes. */
p = (register_t *)((u_register_t)p - sizeof(struct sigframe));
sfp = (struct sigframe *)p;
bzero(sfp, sizeof(struct sigframe));
sfp->sf_signum = sig;