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Diffstat (limited to 'libthreads/i386/csw.S')
| -rw-r--r-- | libthreads/i386/csw.S | 194 |
1 files changed, 0 insertions, 194 deletions
diff --git a/libthreads/i386/csw.S b/libthreads/i386/csw.S deleted file mode 100644 index 69c93652..00000000 --- a/libthreads/i386/csw.S +++ /dev/null @@ -1,194 +0,0 @@ -/* - * Mach Operating System - * Copyright (c) 1991,1990,1989 Carnegie Mellon University - * All Rights Reserved. - * - * Permission to use, copy, modify and distribute this software and its - * documentation is hereby granted, provided that both the copyright - * notice and this permission notice appear in all copies of the - * software, derivative works or modified versions, and any portions - * thereof, and that both notices appear in supporting documentation. - * - * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS" - * CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR - * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE. - * - * Carnegie Mellon requests users of this software to return to - * - * Software Distribution Coordinator or Software.Distribution@CS.CMU.EDU - * School of Computer Science - * Carnegie Mellon University - * Pittsburgh PA 15213-3890 - * - * any improvements or extensions that they make and grant Carnegie Mellon - * the rights to redistribute these changes. - */ -/* - * HISTORY - * $Log: csw.S,v $ - * Revision 1.9 1998/07/20 06:58:28 roland - * 1998-07-20 Roland McGrath <roland@baalperazim.frob.com> - * - * * i386/csw.S (cproc_prepare): Take address of cthread_body as third - * arg, so we don't have to deal with PIC magic to find its address - * without producing a text reloc. - * * cprocs.c (cproc_create): Pass &cthread_body to cproc_prepare. - * - * Revision 1.8 1997/04/04 01:31:16 thomas - * Thu Apr 3 20:29:27 1997 Thomas Bushnell, n/BSG <thomas@gnu.ai.mit.edu> - * - * * i386/csw.S: Define __ELF__ too. - * - * Revision 1.7 1996/10/24 19:30:10 thomas - * Mon Oct 21 22:05:48 1996 Thomas Bushnell, n/BSG <thomas@gnu.ai.mit.edu> - * - * * i386/csw.S (CALL_MCOUNT): New macro. - * (cproc_swtich, cproc_start_wait, cproc_prepare): Use CALL_MCOUNT. - * - * Revision 1.6 1996/08/29 17:44:42 thomas - * *** empty log message *** - * - * Revision 1.5 1995/10/04 20:55:28 roland - * (JUMPTARGET): New macro, versions for [PIC] and not. - * Use it in place of EXT. - * - * Revision 1.4 1995/10/04 20:22:17 roland - * [PIC] (EXT): Redefine to use PLT. - * - * Revision 1.3 1995/05/12 18:35:55 roland - * Use EXT macro instead of explicit underscores. - * -# Revision 1.2 1994/05/04 19:01:50 mib -# entered into RCS -# - * Revision 2.7 91/07/31 18:36:32 dbg - * Fix for ANSI C preprocessor. - * [91/07/30 17:35:16 dbg] - * - * Revision 2.6 91/05/14 17:56:56 mrt - * Correcting copyright - * - * Revision 2.5 91/05/08 13:35:49 dbg - * Unlock lock with a locked instruction (xchg). - * [91/03/20 dbg] - * - * Revision 2.4 91/02/14 14:20:02 mrt - * Changed to new Mach copyright - * [91/02/13 12:15:27 mrt] - * - * Revision 2.3 91/01/08 16:46:20 rpd - * Don't use Times - horta doesn't like it for some reason. - * [91/01/06 rpd] - * - * Revision 2.2 90/05/03 15:54:37 dbg - * Created. - * [90/02/05 dbg] - * - */ -#define ELF -#undef __ELF__ -#define __ELF__ 1 -#include <mach/i386/asm.h> - -#ifdef PIC -#define JUMPTARGET(name) EXT(name##@PLT) -#else -#define JUMPTARGET(name) EXT(name) -#endif - -#ifdef PROF -#define CALL_MCOUNT \ - pushl %ebp; movl %esp, %ebp; call JUMPTARGET(mcount); popl %ebp; -#else -#define CALL_MCOUNT -#endif - - -/* - * Suspend the current thread and resume the next one. - * - * void cproc_switch(int *cur, int *next, int *lock) - */ -ENTRY(cproc_switch) - CALL_MCOUNT - pushl %ebp /* save ebp */ - movl %esp,%ebp /* set frame pointer to get arguments */ - pushl %ebx /* save ebx */ - pushl %esi /* esi */ - pushl %edi /* edi */ - movl B_ARG0,%eax /* get cur */ - movl %esp,(%eax) /* save current esp */ - movl B_ARG2,%edx /* get address of lock before switching */ - /* stacks */ - movl B_ARG1,%eax /* get next */ - movl (%eax),%esp /* get new stack pointer */ - xorl %eax,%eax /* unlock */ - xchgl %eax,(%edx) /* the lock - now old thread can run */ - - popl %edi /* restore di */ - popl %esi /* si */ - popl %ebx /* bx */ - popl %ebp /* and bp (don`t use "leave" - bp */ - /* still points to old stack) */ - ret - -/* - * Create a new stack frame for a 'waiting' thread, - * save current thread's frame, and switch to waiting thread. - * - * void cproc_start_wait(int *cur, - * cproc_t child, - * int stackp, - * int *lock) - */ -ENTRY(cproc_start_wait) - CALL_MCOUNT - pushl %ebp /* save ebp */ - movl %esp,%ebp /* set frame pointer */ - pushl %ebx /* save ebx */ - pushl %esi /* esi */ - pushl %edi /* edi */ - movl B_ARG0,%eax /* get cur */ - movl %esp,(%eax) /* save current esp */ - movl B_ARG1,%eax /* get child thread */ - movl B_ARG3,%edx /* point to lock before switching stack */ - movl B_ARG2,%esp /* get new stack */ - pushl %eax /* push child thread as argument */ - movl $0,%ebp /* (clear frame pointer) */ - xorl %eax,%eax /* unlock */ - xchgl %eax,(%edx) /* the lock - now old thread can run */ - call JUMPTARGET(cproc_waiting)/* call cproc_waiting */ - /*NOTREACHED*/ - -/* - * Set up a thread's stack so that when cproc_switch switches to - * it, it will start up as if it called - * cproc_body(child) - * - * void cproc_prepare(cproc_t child, int *context, int stack, - * void (*cthread_body)(cproc_t)); - */ -ENTRY(cproc_prepare) - CALL_MCOUNT - pushl %ebp /* save ebp */ - movl %esp,%ebp /* set frame pointer */ - movl B_ARG2,%edx /* get child`s stack */ - subl $28,%edx - /* make room for context: */ - /* 0 saved edi () */ - /* 4 saved esi () */ - /* 8 saved ebx () */ - /* 12 saved ebp () */ - /* 16 return PC from cproc_switch */ - /* 20 return PC from cthread_body */ - /* 24 argument to cthread_body */ - movl $0,12(%edx) /* clear frame pointer */ - movl B_ARG3,%ecx /* get address of cthread_body passed in */ - movl %ecx,16(%edx) /* set child to resume at cthread_body */ - movl $0,20(%edx) /* fake return address from cthread_body */ - movl B_ARG0,%ecx /* get child thread pointer */ - movl %ecx,24(%edx) /* set as argument to cthread_body */ - movl B_ARG1,%ecx /* get pointer to context */ - movl %edx,(%ecx) /* save context */ - leave - ret |