xref: /external/python/cpython3/Modules/_ctypes/libffi_osx/x86/x86-darwin.S

#ifdef __i386__
/* -----------------------------------------------------------------------
   darwin.S - Copyright (c) 1996, 1998, 2001, 2002, 2003  Red Hat, Inc.

   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.
   ----------------------------------------------------------------------- */

/*
 * This file is based on sysv.S and then hacked up by Ronald who hasn't done
 * assembly programming in 8 years.
 */

#ifndef __x86_64__

#define LIBFFI_ASM
#include <fficonfig.h>
#include <ffi.h>

#ifdef PyObjC_STRICT_DEBUGGING
  /* XXX: Debugging of stack alignment, to be removed */
#define ASSERT_STACK_ALIGNED movdqa -16(%esp), %xmm0
#else
#define ASSERT_STACK_ALIGNED
#endif

.text

.globl _ffi_prep_args

	.align 4
.globl _ffi_call_SYSV

_ffi_call_SYSV:
LFB1:
        pushl %ebp
LCFI0:
        movl  %esp,%ebp
LCFI1:
        subl $8,%esp
	/* 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  */
	subl  $8,%esp
	pushl 12(%ebp)
	pushl %eax
	call  *8(%ebp)

	/* Return stack to previous state and call the function  */
	addl  $16,%esp

	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   Lretint

	/* Even if there is no space for the return value, we are
	   obliged to handle floating-point values.  */
	cmpl  $FFI_TYPE_FLOAT,%ecx
	jne   Lnoretval
	fstp  %st(0)

    jmp   Lepilogue

Lretint:
	cmpl  $FFI_TYPE_INT,%ecx
	jne   Lretfloat
	/* Load %ecx with the pointer to storage for the return value  */
	movl  24(%ebp),%ecx
	movl  %eax,0(%ecx)
	jmp   Lepilogue

Lretfloat:
	cmpl  $FFI_TYPE_FLOAT,%ecx
	jne   Lretdouble
	/* Load %ecx with the pointer to storage for the return value  */
	movl  24(%ebp),%ecx
	fstps (%ecx)
	jmp   Lepilogue

Lretdouble:
	cmpl  $FFI_TYPE_DOUBLE,%ecx
	jne   Lretlongdouble
	/* Load %ecx with the pointer to storage for the return value  */
	movl  24(%ebp),%ecx
	fstpl (%ecx)
	jmp   Lepilogue

Lretlongdouble:
	cmpl  $FFI_TYPE_LONGDOUBLE,%ecx
	jne   Lretint64
	/* Load %ecx with the pointer to storage for the return value  */
	movl  24(%ebp),%ecx
	fstpt (%ecx)
	jmp   Lepilogue

Lretint64:
	cmpl  $FFI_TYPE_SINT64,%ecx
    jne   Lretstruct1b
	/* Load %ecx with the pointer to storage for the return value  */
	movl  24(%ebp),%ecx
	movl  %eax,0(%ecx)
	movl  %edx,4(%ecx)
	jmp   Lepilogue

Lretstruct1b:
	cmpl  $FFI_TYPE_SINT8,%ecx
    jne   Lretstruct2b
	/* Load %ecx with the pointer to storage for the return value  */
	movl  24(%ebp),%ecx
	movb  %al,0(%ecx)
	jmp   Lepilogue

Lretstruct2b:
	cmpl  $FFI_TYPE_SINT16,%ecx
    jne   Lretstruct
	/* Load %ecx with the pointer to storage for the return value  */
	movl  24(%ebp),%ecx
	movw  %ax,0(%ecx)
	jmp   Lepilogue

Lretstruct:
	cmpl  $FFI_TYPE_STRUCT,%ecx
     jne   Lnoretval
	/* Nothing to do!  */
    addl $4,%esp
    popl %ebp
    ret

Lnoretval:
Lepilogue:
        addl $8,%esp
        movl %ebp,%esp
        popl %ebp
        ret
LFE1:
.ffi_call_SYSV_end:

	.align	4
FFI_HIDDEN (ffi_closure_SYSV)
.globl _ffi_closure_SYSV

_ffi_closure_SYSV:
LFB2:
	pushl	%ebp
LCFI2:
	movl	%esp, %ebp
LCFI3:
	subl	$56, %esp
	leal	-40(%ebp), %edx
	movl	%edx, -12(%ebp)	/* resp */
	leal	8(%ebp), %edx
	movl	%edx, 4(%esp)	/* args = __builtin_dwarf_cfa () */
	leal	-12(%ebp), %edx
	movl	%edx, (%esp)	/* &resp */
	movl	%ebx, 8(%esp)
LCFI7:
	call	L_ffi_closure_SYSV_inner$stub
	movl	8(%esp), %ebx
	movl	-12(%ebp), %ecx
	cmpl	$FFI_TYPE_INT, %eax
	je	Lcls_retint
	cmpl	$FFI_TYPE_FLOAT, %eax
	je	Lcls_retfloat
	cmpl	$FFI_TYPE_DOUBLE, %eax
	je	Lcls_retdouble
	cmpl	$FFI_TYPE_LONGDOUBLE, %eax
	je	Lcls_retldouble
	cmpl	$FFI_TYPE_SINT64, %eax
	je	Lcls_retllong
	cmpl	$FFI_TYPE_UINT8, %eax
	je	Lcls_retstruct1
	cmpl	$FFI_TYPE_SINT8, %eax
	je	Lcls_retstruct1
	cmpl	$FFI_TYPE_UINT16, %eax
	je	Lcls_retstruct2
	cmpl	$FFI_TYPE_SINT16, %eax
	je	Lcls_retstruct2
	cmpl	$FFI_TYPE_STRUCT, %eax
	je	Lcls_retstruct
Lcls_epilogue:
	movl	%ebp, %esp
	popl	%ebp
	ret
Lcls_retint:
	movl	(%ecx), %eax
	jmp	Lcls_epilogue
Lcls_retfloat:
	flds	(%ecx)
	jmp	Lcls_epilogue
Lcls_retdouble:
	fldl	(%ecx)
	jmp	Lcls_epilogue
Lcls_retldouble:
	fldt	(%ecx)
	jmp	Lcls_epilogue
Lcls_retllong:
	movl	(%ecx), %eax
	movl	4(%ecx), %edx
	jmp	Lcls_epilogue
Lcls_retstruct1:
	movsbl	(%ecx), %eax
	jmp	Lcls_epilogue
Lcls_retstruct2:
	movswl	(%ecx), %eax
	jmp	Lcls_epilogue
Lcls_retstruct:
	lea -8(%ebp),%esp
	movl	%ebp, %esp
	popl	%ebp
	ret $4
LFE2:

#if !FFI_NO_RAW_API

#define RAW_CLOSURE_CIF_OFFSET ((FFI_TRAMPOLINE_SIZE + 3) & ~3)
#define RAW_CLOSURE_FUN_OFFSET (RAW_CLOSURE_CIF_OFFSET + 4)
#define RAW_CLOSURE_USER_DATA_OFFSET (RAW_CLOSURE_FUN_OFFSET + 4)
#define CIF_FLAGS_OFFSET 20

	.align	4
FFI_HIDDEN (ffi_closure_raw_SYSV)
.globl _ffi_closure_raw_SYSV

_ffi_closure_raw_SYSV:
LFB3:
	pushl	%ebp
LCFI4:
	movl	%esp, %ebp
LCFI5:
	pushl	%esi
LCFI6:
	subl	$36, %esp
	movl	RAW_CLOSURE_CIF_OFFSET(%eax), %esi	 /* closure->cif */
	movl	RAW_CLOSURE_USER_DATA_OFFSET(%eax), %edx /* closure->user_data */
	movl	%edx, 12(%esp)	/* user_data */
	leal	8(%ebp), %edx	/* __builtin_dwarf_cfa () */
	movl	%edx, 8(%esp)	/* raw_args */
	leal	-24(%ebp), %edx
	movl	%edx, 4(%esp)	/* &res */
	movl	%esi, (%esp)	/* cif */
	call	*RAW_CLOSURE_FUN_OFFSET(%eax)		 /* closure->fun */
	movl	CIF_FLAGS_OFFSET(%esi), %eax		 /* rtype */
	cmpl	$FFI_TYPE_INT, %eax
	je	Lrcls_retint
	cmpl	$FFI_TYPE_FLOAT, %eax
	je	Lrcls_retfloat
	cmpl	$FFI_TYPE_DOUBLE, %eax
	je	Lrcls_retdouble
	cmpl	$FFI_TYPE_LONGDOUBLE, %eax
	je	Lrcls_retldouble
	cmpl	$FFI_TYPE_SINT64, %eax
	je	Lrcls_retllong
Lrcls_epilogue:
	addl	$36, %esp
	popl	%esi
	popl	%ebp
	ret
Lrcls_retint:
	movl	-24(%ebp), %eax
	jmp	Lrcls_epilogue
Lrcls_retfloat:
	flds	-24(%ebp)
	jmp	Lrcls_epilogue
Lrcls_retdouble:
	fldl	-24(%ebp)
	jmp	Lrcls_epilogue
Lrcls_retldouble:
	fldt	-24(%ebp)
	jmp	Lrcls_epilogue
Lrcls_retllong:
	movl	-24(%ebp), %eax
	movl	-20(%ebp), %edx
	jmp	Lrcls_epilogue
LFE3:
#endif

.section __IMPORT,__jump_table,symbol_stubs,self_modifying_code+pure_instructions,5
L_ffi_closure_SYSV_inner$stub:
	.indirect_symbol _ffi_closure_SYSV_inner
	hlt ; hlt ; hlt ; hlt ; hlt


.section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms+live_support
EH_frame1:
	.set	L$set$0,LECIE1-LSCIE1
	.long	L$set$0
LSCIE1:
	.long	0x0
	.byte	0x1
	.ascii "zR\0"
	.byte	0x1
	.byte	0x7c
	.byte	0x8
	.byte	0x1
	.byte	0x10
	.byte	0xc
	.byte	0x5
	.byte	0x4
	.byte	0x88
	.byte	0x1
	.align 2
LECIE1:
.globl _ffi_call_SYSV.eh
_ffi_call_SYSV.eh:
LSFDE1:
	.set	L$set$1,LEFDE1-LASFDE1
	.long	L$set$1
LASFDE1:
	.long	LASFDE1-EH_frame1
	.long	LFB1-.
	.set L$set$2,LFE1-LFB1
	.long L$set$2
	.byte	0x0
	.byte	0x4
	.set L$set$3,LCFI0-LFB1
	.long L$set$3
	.byte	0xe
	.byte	0x8
	.byte	0x84
	.byte	0x2
	.byte	0x4
	.set L$set$4,LCFI1-LCFI0
	.long L$set$4
	.byte	0xd
	.byte	0x4
	.align 2
LEFDE1:
.globl _ffi_closure_SYSV.eh
_ffi_closure_SYSV.eh:
LSFDE2:
	.set	L$set$5,LEFDE2-LASFDE2
	.long	L$set$5
LASFDE2:
	.long	LASFDE2-EH_frame1
	.long	LFB2-.
	.set L$set$6,LFE2-LFB2
	.long L$set$6
	.byte	0x0
	.byte	0x4
	.set L$set$7,LCFI2-LFB2
	.long L$set$7
	.byte	0xe
	.byte	0x8
	.byte	0x84
	.byte	0x2
	.byte	0x4
	.set L$set$8,LCFI3-LCFI2
	.long L$set$8
	.byte	0xd
	.byte	0x4
	.align 2
LEFDE2:

#if !FFI_NO_RAW_API

.globl _ffi_closure_raw_SYSV.eh
_ffi_closure_raw_SYSV.eh:
LSFDE3:
	.set	L$set$10,LEFDE3-LASFDE3
	.long	L$set$10
LASFDE3:
	.long	LASFDE3-EH_frame1
	.long	LFB3-.
	.set L$set$11,LFE3-LFB3
	.long L$set$11
	.byte	0x0
	.byte	0x4
	.set L$set$12,LCFI4-LFB3
	.long L$set$12
	.byte	0xe
	.byte	0x8
	.byte	0x84
	.byte	0x2
	.byte	0x4
	.set L$set$13,LCFI5-LCFI4
	.long L$set$13
	.byte	0xd
	.byte	0x4
	.byte	0x4
	.set L$set$14,LCFI6-LCFI5
	.long L$set$14
	.byte	0x85
	.byte	0x3
	.align 2
LEFDE3:

#endif

#endif /* ifndef __x86_64__ */

#endif /* defined __i386__ */