/* Setup thread stack. Hurd/i386 version. Copyright (C) 2000, 2002 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 Library General Public License as published by the Free Software Foundation; either version 2 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 Library General Public License for more details. You should have received a copy of the GNU Library General Public License along with the GNU C Library; see the file COPYING.LIB. If not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include #include /* The stack layout used on the i386 is: ----------------- | ARG | ----------------- | START_ROUTINE | ----------------- | 0 | ----------------- */ /* Set up the stack for THREAD, such that it appears as if START_ROUTINE and ARG were passed to the new thread's entry-point. Return the stack pointer for the new thread. We also take the opportunity to install THREAD in our utcb. */ static void * stack_setup (struct __pthread *thread, void *(*start_routine)(void *), void *arg) { L4_Word_t *top; /* Calculate top of the new stack. */ top = (L4_Word_t *) ((L4_Word_t) thread->stackaddr + thread->stacksize); if (start_routine) { /* Set up call frame. */ *--top = (L4_Word_t) arg; /* Argument to START_ROUTINE. */ *--top = (L4_Word_t) start_routine; *--top = 0; /* Fake return address. */ } return top; } int __pthread_setup (struct __pthread *thread, void (*entry_point)(void *(*)(void *), void *), void *(*start_routine)(void *), void *arg) { thread->mcontext.pc = entry_point; thread->mcontext.sp = stack_setup (thread, start_routine, arg); if (L4_SameThreads (thread->threadid, L4_Myself ())) L4_Set_MyUserDefinedHandle (thread); else L4_Set_UserDefinedHandle (thread->threadid, thread); return 0; }