/* -----------------------------------------------------------------------
sysv.S - Copyright (c) 2013 The Written Word, Inc.
- Copyright (c) 1996,1998,2001-2003,2005,2008,2010 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 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.
----------------------------------------------------------------------- */
#ifndef __x86_64__
#define LIBFFI_ASM
#include <fficonfig.h>
#include <ffi.h>
.text
.globl ffi_prep_args
.align 4
.globl ffi_call_SYSV
.type ffi_call_SYSV,@function
ffi_call_SYSV:
.LFB1:
pushl %ebp
.LCFI0:
movl %esp,%ebp
.LCFI1:
/* Make room for all of the new args. */
movl 16(%ebp),%ecx
subl %ecx,%esp
/* Align the stack pointer to 16-bytes */
andl $0xfffffff0, %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
call *28(%ebp)
/* Load %ecx with the return type code */
movl 20(%ebp),%ecx
/* Protect %esi. We're going to pop it in the epilogue. */
pushl %esi
/* If the return value pointer is NULL, assume no return value. */
cmpl $0,24(%ebp)
jne 0f
/* 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
0:
call 1f
.Lstore_table:
.long noretval-.Lstore_table /* FFI_TYPE_VOID */
.long retint-.Lstore_table /* FFI_TYPE_INT */
.long retfloat-.Lstore_table /* FFI_TYPE_FLOAT */
.long retdouble-.Lstore_table /* FFI_TYPE_DOUBLE */
.long retlongdouble-.Lstore_table /* FFI_TYPE_LONGDOUBLE */
.long retuint8-.Lstore_table /* FFI_TYPE_UINT8 */
.long retsint8-.Lstore_table /* FFI_TYPE_SINT8 */
.long retuint16-.Lstore_table /* FFI_TYPE_UINT16 */
.long retsint16-.Lstore_table /* FFI_TYPE_SINT16 */
.long retint-.Lstore_table /* FFI_TYPE_UINT32 */
.long retint-.Lstore_table /* FFI_TYPE_SINT32 */
.long retint64-.Lstore_table /* FFI_TYPE_UINT64 */
.long retint64-.Lstore_table /* FFI_TYPE_SINT64 */
.long retstruct-.Lstore_table /* FFI_TYPE_STRUCT */
.long retint-.Lstore_table /* FFI_TYPE_POINTER */
1:
pop %esi
add (%esi, %ecx, 4), %esi
jmp *%esi
/* Sign/zero extend as appropriate. */
retsint8:
movsbl %al, %eax
jmp retint
retsint16:
movswl %ax, %eax
jmp retint
retuint8:
movzbl %al, %eax
jmp retint
retuint16:
movzwl %ax, %eax
jmp retint
retfloat:
/* Load %ecx with the pointer to storage for the return value */
movl 24(%ebp),%ecx
fstps (%ecx)
jmp epilogue
retdouble:
/* Load %ecx with the pointer to storage for the return value */
movl 24(%ebp),%ecx
fstpl (%ecx)
jmp epilogue
retlongdouble:
/* Load %ecx with the pointer to storage for the return value */
movl 24(%ebp),%ecx
fstpt (%ecx)
jmp epilogue
retint64:
/* Load %ecx with the pointer to storage for the return value */
movl 24(%ebp),%ecx
movl %eax,0(%ecx)
movl %edx,4(%ecx)
jmp epilogue
retint:
/* Load %ecx with the pointer to storage for the return value */
movl 24(%ebp),%ecx
movl %eax,0(%ecx)
retstruct:
/* Nothing to do! */
noretval:
epilogue:
popl %esi
movl %ebp,%esp
popl %ebp
ret
.LFE1:
.ffi_call_SYSV_end:
.size ffi_call_SYSV,.ffi_call_SYSV_end-ffi_call_SYSV
.align 4
FFI_HIDDEN (ffi_closure_SYSV)
.globl ffi_closure_SYSV
.type ffi_closure_SYSV, @function
ffi_closure_SYSV:
.LFB2:
pushl %ebp
.LCFI2:
movl %esp, %ebp
.LCFI3:
subl $40, %esp
leal -24(%ebp), %edx
movl %edx, -12(%ebp) /* resp */
leal 8(%ebp), %edx
#ifdef __SUNPRO_C
/* The SUNPRO compiler doesn't support GCC's regparm function
attribute, so we have to pass all three arguments to
ffi_closure_SYSV_inner on the stack. */
movl %edx, 8(%esp) /* args = __builtin_dwarf_cfa () */
leal -12(%ebp), %edx
movl %edx, 4(%esp) /* &resp */
movl %eax, (%esp) /* closure */
#else
movl %edx, 4(%esp) /* args = __builtin_dwarf_cfa () */
leal -12(%ebp), %edx
movl %edx, (%esp) /* &resp */
#endif
#if defined HAVE_HIDDEN_VISIBILITY_ATTRIBUTE || !defined __PIC__
call ffi_closure_SYSV_inner
#else
movl %ebx, 8(%esp)
.LCFI7:
call 1f
1: popl %ebx
addl $_GLOBAL_OFFSET_TABLE_+[.-1b], %ebx
call ffi_closure_SYSV_inner@PLT
movl 8(%esp), %ebx
#endif
movl -12(%ebp), %ecx
cmpl $FFI_TYPE_INT, %eax
je .Lcls_retint
/* Handle FFI_TYPE_UINT8, FFI_TYPE_SINT8, FFI_TYPE_UINT16,
FFI_TYPE_SINT16, FFI_TYPE_UINT32, FFI_TYPE_SINT32. */
cmpl $FFI_TYPE_UINT64, %eax
jge 0f
cmpl $FFI_TYPE_UINT8, %eax
jge .Lcls_retint
0: 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_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_retstruct:
movl %ebp, %esp
popl %ebp
ret $4
.LFE2:
.size ffi_closure_SYSV, .-ffi_closure_SYSV
#if !FFI_NO_RAW_API
/* Precalculate for e.g. the Solaris 10/x86 assembler. */
#if FFI_TRAMPOLINE_SIZE == 10
#define RAW_CLOSURE_CIF_OFFSET 12
#define RAW_CLOSURE_FUN_OFFSET 16
#define RAW_CLOSURE_USER_DATA_OFFSET 20
#elif FFI_TRAMPOLINE_SIZE == 24
#define RAW_CLOSURE_CIF_OFFSET 24
#define RAW_CLOSURE_FUN_OFFSET 28
#define RAW_CLOSURE_USER_DATA_OFFSET 32
#else
#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)
#endif
#define CIF_FLAGS_OFFSET 20
.align 4
FFI_HIDDEN (ffi_closure_raw_SYSV)
.globl ffi_closure_raw_SYSV
.type ffi_closure_raw_SYSV, @function
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
/* Handle FFI_TYPE_UINT8, FFI_TYPE_SINT8, FFI_TYPE_UINT16,
FFI_TYPE_SINT16, FFI_TYPE_UINT32, FFI_TYPE_SINT32. */
cmpl $FFI_TYPE_UINT64, %eax
jge 0f
cmpl $FFI_TYPE_UINT8, %eax
jge .Lrcls_retint
0:
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:
.size ffi_closure_raw_SYSV, .-ffi_closure_raw_SYSV
#endif
#if defined __GNUC__
/* Only emit dwarf unwind info when building with GNU toolchain. */
#if defined __PIC__
# if defined __sun__ && defined __svr4__
/* 32-bit Solaris 2/x86 uses datarel encoding for PIC. GNU ld before 2.22
doesn't correctly sort .eh_frame_hdr with mixed encodings, so match this. */
# define FDE_ENCODING 0x30 /* datarel */
# define FDE_ENCODE(X) X@GOTOFF
# else
# define FDE_ENCODING 0x1b /* pcrel sdata4 */
# if defined HAVE_AS_X86_PCREL
# define FDE_ENCODE(X) X-.
# else
# define FDE_ENCODE(X) X@rel
# endif
# endif
#else
# define FDE_ENCODING 0 /* absolute */
# define FDE_ENCODE(X) X
#endif
.section .eh_frame,EH_FRAME_FLAGS,@progbits
.Lframe1:
.long .LECIE1-.LSCIE1 /* Length of Common Information Entry */
.LSCIE1:
.long 0x0 /* CIE Identifier Tag */
.byte 0x1 /* CIE Version */
#ifdef HAVE_AS_ASCII_PSEUDO_OP
#ifdef __PIC__
.ascii "zR\0" /* CIE Augmentation */
#else
.ascii "\0" /* CIE Augmentation */
#endif
#elif defined HAVE_AS_STRING_PSEUDO_OP
#ifdef __PIC__
.string "zR" /* CIE Augmentation */
#else
.string "" /* CIE Augmentation */
#endif
#else
#error missing .ascii/.string
#endif
.byte 0x1 /* .uleb128 0x1; CIE Code Alignment Factor */
.byte 0x7c /* .sleb128 -4; CIE Data Alignment Factor */
.byte 0x8 /* CIE RA Column */
#ifdef __PIC__
.byte 0x1 /* .uleb128 0x1; Augmentation size */
.byte FDE_ENCODING
#endif
.byte 0xc /* DW_CFA_def_cfa */
.byte 0x4 /* .uleb128 0x4 */
.byte 0x4 /* .uleb128 0x4 */
.byte 0x88 /* DW_CFA_offset, column 0x8 */
.byte 0x1 /* .uleb128 0x1 */
.align 4
.LECIE1:
.LSFDE1:
.long .LEFDE1-.LASFDE1 /* FDE Length */
.LASFDE1:
.long .LASFDE1-.Lframe1 /* FDE CIE offset */
.long FDE_ENCODE(.LFB1) /* FDE initial location */
.long .LFE1-.LFB1 /* FDE address range */
#ifdef __PIC__
.byte 0x0 /* .uleb128 0x0; Augmentation size */
#endif
.byte 0x4 /* DW_CFA_advance_loc4 */
.long .LCFI0-.LFB1
.byte 0xe /* DW_CFA_def_cfa_offset */
.byte 0x8 /* .uleb128 0x8 */
.byte 0x85 /* DW_CFA_offset, column 0x5 */
.byte 0x2 /* .uleb128 0x2 */
.byte 0x4 /* DW_CFA_advance_loc4 */
.long .LCFI1-.LCFI0
.byte 0xd /* DW_CFA_def_cfa_register */
.byte 0x5 /* .uleb128 0x5 */
.align 4
.LEFDE1:
.LSFDE2:
.long .LEFDE2-.LASFDE2 /* FDE Length */
.LASFDE2:
.long .LASFDE2-.Lframe1 /* FDE CIE offset */
.long FDE_ENCODE(.LFB2) /* FDE initial location */
.long .LFE2-.LFB2 /* FDE address range */
#ifdef __PIC__
.byte 0x0 /* .uleb128 0x0; Augmentation size */
#endif
.byte 0x4 /* DW_CFA_advance_loc4 */
.long .LCFI2-.LFB2
.byte 0xe /* DW_CFA_def_cfa_offset */
.byte 0x8 /* .uleb128 0x8 */
.byte 0x85 /* DW_CFA_offset, column 0x5 */
.byte 0x2 /* .uleb128 0x2 */
.byte 0x4 /* DW_CFA_advance_loc4 */
.long .LCFI3-.LCFI2
.byte 0xd /* DW_CFA_def_cfa_register */
.byte 0x5 /* .uleb128 0x5 */
#if !defined HAVE_HIDDEN_VISIBILITY_ATTRIBUTE && defined __PIC__
.byte 0x4 /* DW_CFA_advance_loc4 */
.long .LCFI7-.LCFI3
.byte 0x83 /* DW_CFA_offset, column 0x3 */
.byte 0xa /* .uleb128 0xa */
#endif
.align 4
.LEFDE2:
#if !FFI_NO_RAW_API
.LSFDE3:
.long .LEFDE3-.LASFDE3 /* FDE Length */
.LASFDE3:
.long .LASFDE3-.Lframe1 /* FDE CIE offset */
.long FDE_ENCODE(.LFB3) /* FDE initial location */
.long .LFE3-.LFB3 /* FDE address range */
#ifdef __PIC__
.byte 0x0 /* .uleb128 0x0; Augmentation size */
#endif
.byte 0x4 /* DW_CFA_advance_loc4 */
.long .LCFI4-.LFB3
.byte 0xe /* DW_CFA_def_cfa_offset */
.byte 0x8 /* .uleb128 0x8 */
.byte 0x85 /* DW_CFA_offset, column 0x5 */
.byte 0x2 /* .uleb128 0x2 */
.byte 0x4 /* DW_CFA_advance_loc4 */
.long .LCFI5-.LCFI4
.byte 0xd /* DW_CFA_def_cfa_register */
.byte 0x5 /* .uleb128 0x5 */
.byte 0x4 /* DW_CFA_advance_loc4 */
.long .LCFI6-.LCFI5
.byte 0x86 /* DW_CFA_offset, column 0x6 */
.byte 0x3 /* .uleb128 0x3 */
.align 4
.LEFDE3:
#endif
#endif
#endif /* ifndef __x86_64__ */
#if defined __ELF__ && defined __linux__
.section .note.GNU-stack,"",@progbits
#endif