diff options
Diffstat (limited to 'sysdeps/unix/sysv/solaris2/kopensolaris-gnu/i386/getcontext.S')
-rw-r--r-- | sysdeps/unix/sysv/solaris2/kopensolaris-gnu/i386/getcontext.S | 72 |
1 files changed, 72 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/i386/getcontext.S b/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/i386/getcontext.S new file mode 100644 index 0000000000..e989d3efb4 --- /dev/null +++ b/sysdeps/unix/sysv/solaris2/kopensolaris-gnu/i386/getcontext.S @@ -0,0 +1,72 @@ +/* Copyright (C) 2008 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by David Bartley <dtbartle@csclub.uwaterloo.ca>, 2008. + + 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" + +/* note: make sure that we do not use %edx as a scratch (see swapcontext.S) */ + +ENTRY(__getcontext) + /* load ucp (arg) into %ecx */ + movl 4(%esp), %ecx + + /* load return address into %eax */ + movl 0(%esp), %eax + + /* push ucp, subcall number, and return address */ + pushl %ecx; cfi_adjust_cfa_offset (4) + pushl $SYS_SUB_getcontext; cfi_adjust_cfa_offset (4) + pushl %eax; cfi_adjust_cfa_offset (4) + + /* call context syscall */ + DO_CALL(context, 2) + + /* Jump if not error. */ + jnb 1f; + + /* pop args from stack */ + addl $12, %esp; cfi_adjust_cfa_offset (-12) + + /* Jump to error label. */ + jmp SYSCALL_ERROR_LABEL; + +1: + /* pop args from stack */ + addl $12, %esp; cfi_adjust_cfa_offset (-12); + + /* load ucp (arg) into %ecx */ + movl 4(%esp), %ecx + + /* save %esp */ + leal 4(%esp), %eax + movl %eax, oUESP(%ecx) + + /* save %eip */ + movl 0(%esp), %eax + movl %eax, oEIP(%ecx) + + /* return 0 on success */ + xorl %eax, %eax + movl %eax, oEAX(%ecx) +L(pseudo_end): + ret +PSEUDO_END(__getcontext) + +weak_alias (__getcontext, getcontext) |