diff options
Diffstat (limited to 'nuttx/arch/sim/src/up_setjmp.S')
| -rw-r--r-- | nuttx/arch/sim/src/up_setjmp.S | 129 |
1 files changed, 129 insertions, 0 deletions
diff --git a/nuttx/arch/sim/src/up_setjmp.S b/nuttx/arch/sim/src/up_setjmp.S new file mode 100644 index 0000000000..96b9bfee88 --- /dev/null +++ b/nuttx/arch/sim/src/up_setjmp.S @@ -0,0 +1,129 @@ +/************************************************************************** + * up_setjmp.S + * + * Copyright (C) 2007 Gregory Nutt. All rights reserved. + * Author: Gregory Nutt <spudmonkey@racsa.co.cr> + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in + * the documentation and/or other materials provided with the + * distribution. + * 3. Neither the name Gregory Nutt nor the names of its contributors may be + * used to endorse or promote products derived from this software + * without specific prior written permission. + * + * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS + * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT + * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS + * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE + * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, + * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, + * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS + * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED + * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN + * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE + * POSSIBILITY OF SUCH DAMAGE. + * + **************************************************************************/ + +/************************************************************************** + * Conditional Compilation Options + **************************************************************************/ + +/************************************************************************** + * Included Files + **************************************************************************/ + +#include "up_internal.h" + +/************************************************************************** + * Private Definitions + **************************************************************************/ + +/************************************************************************** + * Private Types + **************************************************************************/ + +/************************************************************************** + * Private Function Prototypes + **************************************************************************/ + +/************************************************************************** + * Global Variables + **************************************************************************/ + +/************************************************************************** + * Private Variables + **************************************************************************/ + +/************************************************************************** + * Private Functions + **************************************************************************/ + +/************************************************************************** + * Public Functions + **************************************************************************/ + + .text + .globl up_setjmp + .type up_setjmp, @function +up_setjmp: + + /* %ebx, %esi, %edi, and %ebp must be preserved. + * save %ebx, $esi, and %edi now... */ + + movl 4(%esp), %eax + movl %ebx, (JB_EBX)(%eax) + movl %esi, (JB_ESI)(%eax) + movl %edi, (JB_EDI)(%eax) + + /* Save the value of SP as will be after we return */ + + leal 4(%esp), %ecx + movl %ecx, (JB_SP)(%eax) + + /* Save the return PC */ + + movl 0(%esp), %ecx + movl %ecx, (JB_PC)(%eax) + + /* Save the framepointer */ + + movl %ebp, (JB_EBP)(%eax) + + /* And return 0 */ + + xorl %eax, %eax + ret + .size up_setjmp, . - up_setjmp + + .globl up_longjmp + .type up_longjmp, @function +up_longjmp: + movl 4(%esp), %ecx /* U_pthread_jmpbuf in %ecx. */ + movl 8(%esp), %eax /* Second argument is return value. */ + + /* Save the return address now. */ + + movl (JB_PC)(%ecx), %edx + + /* Restore registers. */ + + movl (JB_EBX)(%ecx), %ebx + movl (JB_ESI)(%ecx), %esi + movl (JB_EDI)(%ecx), %edi + movl (JB_EBP)(%ecx), %ebp + movl (JB_SP)(%ecx), %esp + + /* Jump to saved PC. */ + + jmp *%edx + .size up_longjmp, . - up_longjmp + |