Author: kib
Date: Fri Nov 8 16:57:55 2013
New Revision: 257858
URL: http://svnweb.freebsd.org/changeset/base/257858
Log:
Fix signal delivery for the iBCS2 binaries. The iBCS2 sysvec uses
current FreeBSD signal trampoline, but does not specifies
sv_sigcode_base, since shared page is not mapped. This results in the
zero %eip for the signal frame. Fall back to calculating %eip as
offset from the psstrings when sv_sigcode_base is not initialized.
Reported by: Rich Naill <r...@enterprisesystems.net>
Sponsored by: The FreeBSD Foundation
MFC after: 1 week
Modified:
head/sys/i386/i386/machdep.c
Modified: head/sys/i386/i386/machdep.c
==============================================================================
--- head/sys/i386/i386/machdep.c Fri Nov 8 16:56:13 2013
(r257857)
+++ head/sys/i386/i386/machdep.c Fri Nov 8 16:57:55 2013
(r257858)
@@ -757,6 +757,8 @@ sendsig(sig_t catcher, ksiginfo_t *ksi,
regs->tf_esp = (int)sfp;
regs->tf_eip = p->p_sysent->sv_sigcode_base;
+ if (regs->tf_eip == 0)
+ regs->tf_eip = p->p_sysent->sv_psstrings - szsigcode;
regs->tf_eflags &= ~(PSL_T | PSL_D);
regs->tf_cs = _ucodesel;
regs->tf_ds = _udatasel;
_______________________________________________
svn-src-head@freebsd.org mailing list
http://lists.freebsd.org/mailman/listinfo/svn-src-head
To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
