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/* -----------------------------------------------------------------------
win32.S - Copyright (c) 1996, 1998, 2001, 2002 Red Hat, Inc.
Copyright (c) 2001 John Beniton
Copyright (c) 2002 Ranjit Mathew
X86 Foreign Function Interface
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 CYGNUS SOLUTIONS 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.
----------------------------------------------------------------------- */
#define LIBFFI_ASM
#include <fficonfig.h>
#include <ffi.h>
.text
.globl ffi_prep_args
# This assumes we are using gas.
.balign 16
.globl _ffi_call_SYSV
_ffi_call_SYSV:
pushl %ebp
movl %esp,%ebp
# Make room for all of the new args.
movl 16(%ebp),%ecx
subl %ecx,%esp
movl %esp,%eax
# Place all of the ffi_prep_args in position
pushl 12(%ebp)
pushl %eax
call *8(%ebp)
# Return stack to previous state and call the function
addl $8,%esp
# FIXME: Align the stack to a 128-bit boundary to avoid
# potential performance hits.
call *28(%ebp)
# Remove the space we pushed for the args
movl 16(%ebp),%ecx
addl %ecx,%esp
# Load %ecx with the return type code
movl 20(%ebp),%ecx
# If the return value pointer is NULL, assume no return value.
cmpl $0,24(%ebp)
jne retint
# Even if there is no space for the return value, we are
# obliged to handle floating-point values.
cmpl $FFI_TYPE_FLOAT,%ecx
jne noretval
fstp %st(0)
jmp epilogue
retint:
cmpl $FFI_TYPE_INT,%ecx
jne retfloat
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
movl %eax,0(%ecx)
jmp epilogue
retfloat:
cmpl $FFI_TYPE_FLOAT,%ecx
jne retdouble
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
fstps (%ecx)
jmp epilogue
retdouble:
cmpl $FFI_TYPE_DOUBLE,%ecx
jne retlongdouble
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
fstpl (%ecx)
jmp epilogue
retlongdouble:
cmpl $FFI_TYPE_LONGDOUBLE,%ecx
jne retint64
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
fstpt (%ecx)
jmp epilogue
retint64:
cmpl $FFI_TYPE_SINT64,%ecx
jne retstruct1b
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
movl %eax,0(%ecx)
movl %edx,4(%ecx)
retstruct1b:
cmpl $FFI_TYPE_SINT8,%ecx
jne retstruct2b
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
movb %al,0(%ecx)
jmp epilogue
retstruct2b:
cmpl $FFI_TYPE_SINT16,%ecx
jne retstruct
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
movw %ax,0(%ecx)
jmp epilogue
retstruct:
# Nothing to do!
noretval:
epilogue:
movl %ebp,%esp
popl %ebp
ret
.ffi_call_SYSV_end:
# This assumes we are using gas.
.balign 16
.globl _ffi_call_STDCALL
_ffi_call_STDCALL:
pushl %ebp
movl %esp,%ebp
# Make room for all of the new args.
movl 16(%ebp),%ecx
subl %ecx,%esp
movl %esp,%eax
# Place all of the ffi_prep_args in position
pushl 12(%ebp)
pushl %eax
call *8(%ebp)
# Return stack to previous state and call the function
addl $8,%esp
# FIXME: Align the stack to a 128-bit boundary to avoid
# potential performance hits.
call *28(%ebp)
# stdcall functions pop arguments off the stack themselves
# Load %ecx with the return type code
movl 20(%ebp),%ecx
# If the return value pointer is NULL, assume no return value.
cmpl $0,24(%ebp)
jne sc_retint
# Even if there is no space for the return value, we are
# obliged to handle floating-point values.
cmpl $FFI_TYPE_FLOAT,%ecx
jne sc_noretval
fstp %st(0)
jmp sc_epilogue
sc_retint:
cmpl $FFI_TYPE_INT,%ecx
jne sc_retfloat
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
movl %eax,0(%ecx)
jmp sc_epilogue
sc_retfloat:
cmpl $FFI_TYPE_FLOAT,%ecx
jne sc_retdouble
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
fstps (%ecx)
jmp sc_epilogue
sc_retdouble:
cmpl $FFI_TYPE_DOUBLE,%ecx
jne sc_retlongdouble
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
fstpl (%ecx)
jmp sc_epilogue
sc_retlongdouble:
cmpl $FFI_TYPE_LONGDOUBLE,%ecx
jne sc_retint64
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
fstpt (%ecx)
jmp sc_epilogue
sc_retint64:
cmpl $FFI_TYPE_SINT64,%ecx
jne sc_retstruct1b
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
movl %eax,0(%ecx)
movl %edx,4(%ecx)
sc_retstruct1b:
cmpl $FFI_TYPE_SINT8,%ecx
jne sc_retstruct2b
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
movb %al,0(%ecx)
jmp sc_epilogue
sc_retstruct2b:
cmpl $FFI_TYPE_SINT16,%ecx
jne sc_retstruct
# Load %ecx with the pointer to storage for the return value
movl 24(%ebp),%ecx
movw %ax,0(%ecx)
jmp sc_epilogue
sc_retstruct:
# Nothing to do!
sc_noretval:
sc_epilogue:
movl %ebp,%esp
popl %ebp
ret
.ffi_call_STDCALL_end:
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