freebsd-nq/sys/pc98
Marcel Moolenaar c5c6b7b38e Re-introduction of sigcontext.
struct sigcontext and ucontext_t/mcontext_t are defined in such
a way that both (ie struct sigcontext and ucontext_t) can be
passed on to sigreturn. The signal handler is still given a
ucontext_t for maximum flexibility.

For backward compatibility sigreturn restores the state for the
alternate signal stack from sigcontext.sc_onstack and not from
ucontext_t.uc_stack. A good way to determine which value the
application has set and thus which value to use, is still open
for discussion.

NOTE: This change should only affect those binaries that use
      sigcontext and/or ucontext_t. In the source tree itself
      this is only doscmd. Recompilation is required for those
      applications.

This commit also fixes a lot of style bugs without hopefully
adding new ones.

NOTE: struct sigaltstack.ss_size now has type size_t again. For
      some reason I changed that into unsigned int.

Parts submitted by: bde
sigaltstack bug found by: bde
1999-10-04 19:33:58 +00:00
..
boot $Id$ -> $FreeBSD$ 1999-08-28 01:08:13 +00:00
cbus Merge from sys/isa/fd.c revision 1.146, 1.153, 1.154 and 1.159. 1999-09-27 03:32:31 +00:00
conf Sync w/ sys/i386/conf/files.i386 revision 1.275. 1999-10-01 12:29:49 +00:00
i386 Re-introduction of sigcontext. 1999-10-04 19:33:58 +00:00
pc98 Re-introduction of sigcontext. 1999-10-04 19:33:58 +00:00