r1066 - trunk/glibc-2.3-head/sysdeps/kfreebsd/i386
Author: ps-guest
Date: 2006-01-18 14:08:57 +0000 (Wed, 18 Jan 2006)
New Revision: 1066
Modified:
trunk/glibc-2.3-head/sysdeps/kfreebsd/i386/makecontext.S
Log:
linux version uses unfortunately #include "ucontext_i.h" instead of #include <ucontext_i.h>
Modified: trunk/glibc-2.3-head/sysdeps/kfreebsd/i386/makecontext.S
===================================================================
--- trunk/glibc-2.3-head/sysdeps/kfreebsd/i386/makecontext.S 2006-01-18 10:41:04 UTC (rev 1065)
+++ trunk/glibc-2.3-head/sysdeps/kfreebsd/i386/makecontext.S 2006-01-18 14:08:57 UTC (rev 1066)
@@ -1 +1,113 @@
-#include <sysdeps/unix/sysv/linux/i386/makecontext.S>
+/* Create new context.
+ Copyright (C) 2001,02 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Ulrich Drepper <drepper@redhat.com>, 2001.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+#include <sysdep.h>
+
+#include <ucontext_i.h>
+
+
+ENTRY(__makecontext)
+ movl 4(%esp), %eax
+
+ /* Load the address of the function we are supposed to run. */
+ movl 8(%esp), %ecx
+
+ /* Compute the address of the stack. The information comes from
+ to us_stack element. */
+ movl oSS_SP(%eax), %edx
+ movl %ecx, oEIP(%eax)
+ addl oSS_SIZE(%eax), %edx
+
+ /* Put the next context on the new stack (from the uc_link
+ element). */
+ movl oLINK(%eax), %ecx
+ movl %ecx, -4(%edx)
+
+ /* Remember the number of parameters for the exit handler since
+ it has to remove them. We store the number in the EBX register
+ which the function we will call must preserve. */
+ movl 12(%esp), %ecx
+ movl %ecx, oEBX(%eax)
+
+ /* Make room on the new stack for the parameters. */
+ negl %ecx
+ leal -8(%edx,%ecx,4), %edx
+ negl %ecx
+ /* Store the future stack pointer. */
+ movl %edx, oESP(%eax)
+
+ /* Copy all the parameters. */
+ jecxz 2f
+1: movl 12(%esp,%ecx,4), %eax
+ movl %eax, (%edx,%ecx,4)
+ decl %ecx
+ jnz 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). */
+#ifdef PIC
+ call 1f
+1: popl %ecx
+ addl $L(exitcode)-1b, %ecx
+ movl %ecx, (%edx)
+#else
+ movl $L(exitcode), (%edx)
+#endif
+ /* 'makecontext' returns no value. */
+ ret
+
+ /* 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. */
+L(exitcode):
+ /* This removes the parameters passed to the function given to
+ 'makecontext' from the stack. EBX contains the number of
+ parameters (see above). */
+ leal (%esp,%ebx,4), %esp
+
+#ifdef PIC
+ call 1f
+1: popl %ebx
+ addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx
+#endif
+ popl %eax /* This is the next context. */
+ testl %eax, %eax
+ je 2f /* If it is zero exit. */
+
+ pushl %eax
+ call JUMPTARGET(__setcontext)
+ /* If this returns (which can happen if the syscall fails) we'll
+ exit the program with the return error value (-1). */
+
+2: pushl %eax
+ call HIDDEN_JUMPTARGET(exit)
+ /* The 'exit' call should never return. In case it does cause
+ the process to terminate. */
+ hlt
+END(__makecontext)
+
+weak_alias(__makecontext, makecontext)
Reply to: