diff options
Diffstat (limited to 'ports/sysdeps/unix/sysv/linux/m68k/m680x0/makecontext.S')
| -rw-r--r-- | ports/sysdeps/unix/sysv/linux/m68k/m680x0/makecontext.S | 100 |
1 files changed, 0 insertions, 100 deletions
diff --git a/ports/sysdeps/unix/sysv/linux/m68k/m680x0/makecontext.S b/ports/sysdeps/unix/sysv/linux/m68k/m680x0/makecontext.S deleted file mode 100644 index 0d98753eec..0000000000 --- a/ports/sysdeps/unix/sysv/linux/m68k/m680x0/makecontext.S +++ /dev/null @@ -1,100 +0,0 @@ -/* Create new context. - Copyright (C) 2012-2014 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <sysdep.h> - -#include "ucontext_i.h" - - -ENTRY(__makecontext) - move.l 4(%sp), %a0 - - /* Get the address of the function we are supposed to run. */ - move.l 8(%sp), oPC(%a0) - - /* Compute the address of the stack. The information comes from - to us_stack element. */ - move.l oSS_SP(%a0), %a1 - add.l oSS_SIZE(%a0), %a1 - - /* Remember the number of parameters for the exit handler since - it has to remove them. We store the number in the D7 register - which the function we will call must preserve. */ - move.l 12(%sp), %d1 - move.l %d1, oGREGS+7*4(%a0) - - /* Make room on the new stack for the parameters. - Room for the arguments, return address (== 1f) and - oLINK pointer is needed. */ - neg.l %d1 - lea -8(%a1,%d1.l*4), %a1 - neg.l %d1 - - /* Store the future stack pointer. */ - move.l %a1, oSP(%a0) - - /* Put the next context on the new stack (from the uc_link - element). */ - move.l oLINK(%a0), 4(%a1,%d1.l*4) - - /* Copy all the parameters. */ -1: subq.l #1,%d1 - jmi 2f - move.l 16(%sp,%d1.l*4), 4(%a1,%d1.l*4) - jra 1b -2: - - /* If the function we call returns we must continue with the - context which is given in the uc_link element. To do this - set the return address for the function the user provides - to a little bit of helper code which does the magic (see - below). */ - lea 1f(%pc), %a0 - move.l %a0, (%a1) - /* 'makecontext' returns no value. */ - rts - - /* This is the helper code which gets called if a function which - is registered with 'makecontext' returns. In this case we - have to install the context listed in the uc_link element of - the context 'makecontext' manipulated at the time of the - 'makecontext' call. If the pointer is NULL the process must - terminate. */ - cfi_endproc -1: - /* This removes the parameters passed to the function given to - 'makecontext' from the stack. D7 contains the number of - parameters (see above). */ - lea (%sp,%d7.l*4), %sp - - tst.l (%sp) /* Check the next context. */ - jeq 2f /* If it is zero exit. */ - - jbsr JUMPTARGET(__setcontext) - /* If this returns (which can happen if the syscall fails) we'll - exit the program with the return error value (-1). */ - - move.l %d0, (%sp) -2: jbsr HIDDEN_JUMPTARGET(exit) - /* The 'exit' call should never return. In case it does cause - the process to terminate. */ - illegal - cfi_startproc -END(__makecontext) - -weak_alias (__makecontext, makecontext) |