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-rw-r--r--sample/c32entry.S66
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diff --git a/sample/c32entry.S b/sample/c32entry.S
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-# -----------------------------------------------------------------------
-#
-# Copyright 2003-2008 H. Peter Anvin - All Rights Reserved
-#
-# Permission is hereby granted, free of charge, to any person
-# obtaining a copy of this software and associated documentation
-# files (the "Software"), to deal in the Software without
-# restriction, including without limitation the rights to use,
-# copy, modify, merge, publish, distribute, sublicense, and/or
-# sell copies of the Software, and to permit persons to whom
-# the Software is furnished to do so, subject to the following
-# conditions:
-#
-# The above copyright notice and this permission notice shall
-# be included in all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
-# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
-# OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
-# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
-# HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
-# WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
-# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
-# OTHER DEALINGS IN THE SOFTWARE.
-#
-# -----------------------------------------------------------------------
-
-# COM32 start up code - must be linked first in the binary
-
-
- .section ".text","ax"
- .globl _start
-_start:
- # This first instruction acts as COM32 magic number
- movl $0x21cd4cff,%eax
-
- # Upwards string operations
- cld
-
- # Zero the .bss segment
- xorl %eax,%eax
- movl $__bss_start,%edi # Symbol provided by linker
- movl $_end+3,%ecx # Symbol provided by linker
- subl %edi,%ecx
- shrl $2,%ecx
- rep ; stosl
-
- # Copy COM32 invocation parameters
- leal 4(%esp),%esi # Argument list
- movl $__com32,%edi
- movl $6,%ecx
- movl %esp,-4(%edi) # Save the initial stack ptr
- cmpl (%esi),%ecx
- jbe 1f
- movl (%esi),%ecx
-1: rep ; movsl
-
- # Run program; we call this __start rather than main since we
- # did not parse the command line or anything like that.
- jmp __start
-
- .section ".bss","aw"
- .globl __entry_esp
-__entry_esp: .space 4
- .globl __com32
-__com32: .space 4*6