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 <[EMAIL PROTECTED]>, 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) -- To UNSUBSCRIBE, email to [EMAIL PROTECTED] with a subject of "unsubscribe". Trouble? Contact [EMAIL PROTECTED]
