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From: Marcel Moolenaar <marcel@FreeBSD.org>
Date: Sat, 31 May 2003 12:42:51 -0700 (PDT)
To: src-committers@FreeBSD.org, cvs-src@FreeBSD.org,
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X-FreeBSD-CVS-Branch: HEAD
Subject: cvs commit: src/lib/libc/ia64/gen Makefile.inc makecontext.c
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marcel      2003/05/31 12:42:51 PDT

  FreeBSD src repository

  Modified files:
    lib/libc/ia64/gen    Makefile.inc 
  Added files:
    lib/libc/ia64/gen    makecontext.c 
  Log:
  Rough implement of makecontext() needed to support libthr.
  o  Up to 8 arguments are allowed. This is the number of arguments
     passed in registers. Subsequent registers are passed on the stack.
     Trying to deal with this is not easy in C and likely forces us to
     use assembly code. Let's avoid that for now. There's no indication
     that more than 8 arguments is a strong requirement (Linux also has
     an 8 argument limit).
  o  We expect that the stack base is 16-byte aligned and the stack
     size is a multiple of 16-byte. We bomb out if this is not the case.
     We probably want to be less strict by enforcing it ourselves. For
     now it's better to not hide gross alignment bogons by silently
     correcting it.
  
  Revision  Changes    Path
  1.7       +1 -1      src/lib/libc/ia64/gen/Makefile.inc
  1.1       +121 -0    src/lib/libc/ia64/gen/makecontext.c (new)