Commit Graph

5 Commits

Author SHA1 Message Date
Marcel Moolenaar
ec1d9fe8ff Fix type of sf_addr.
Pointed out by: bde
1999-12-04 10:40:24 +00:00
Marcel Moolenaar
4c53edc53b Change the type of sf_addr in struct {o}sigframe from char* to
register_t.

Fix some style bugs and bitrotted comments.

Submitted by: bde
1999-11-12 11:21:34 +00:00
Marcel Moolenaar
210430fd8d Simplification of the signal trampoline and other cleanups.
o  Remove unused defines from genassym.c that were needed
   by the trampoline.
o  Add load_gs_param function to support.s that catches
   a fault when %gs is loaded with an invalid descriptor.
   The function returns EFAULT in that case.
o  Remove struct trapframe from mcontext_t and replace it
   with the list of registers.
o  Modify sendsig and sigreturn accordingly.

This commit contains a patch by bde.

Reviewed by: luoqi, jdp
1999-10-07 12:40:34 +00:00
Marcel Moolenaar
0afa439d45 Fix style bugs caused by using the wrong file to copy from. That one
gets fixed later on.

Reinstate the mysterious 4th argument to signal handlers and add some
comments on that.
1999-10-03 12:55:58 +00:00
Marcel Moolenaar
91078fca0c sigset_t change (part 3 of 5)
-----------------------------

By introducing a new sigframe so that the signal handler operates
on the new siginfo_t and on ucontext_t instead of sigcontext, we
now need two version of sendsig and sigreturn.

A flag in struct proc determines whether the process expects an
old sigframe or a new sigframe. The signal trampoline handles
which sigreturn to call. It does this by testing for a magic
cookie in the frame.

The alpha uses osigreturn to implement longjmp. This means that
osigreturn is not only used for compatibility with existing
binaries. To handle the new sigset_t, setjmp saves it in
sc_reserved (see NOTE).

the struct sigframe has been moved from frame.h to sigframe.h
to handle the complex header dependencies that was caused by
the new sigframe.

NOTE: For the i386, the size of jmp_buf has been increased to hold
      the new sigset_t. On the alpha this has been prevented by
      using sc_reserved in sigcontext.
1999-09-29 15:06:27 +00:00