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|
/* -----------------------------------------------------------------------
sysv.S - Copyright (c) 2012 Alan Hourihane
Copyright (c) 1998, 2012 Andreas Schwab
Copyright (c) 2008 Red Hat, Inc.
Copyright (c) 2012 Thorsten Glaser
m68k 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.
----------------------------------------------------------------------- */
#define LIBFFI_ASM
#include <fficonfig.h>
#include <ffi.h>
#ifdef HAVE_AS_CFI_PSEUDO_OP
#define CFI_STARTPROC() .cfi_startproc
#define CFI_OFFSET(reg,off) .cfi_offset reg,off
#define CFI_DEF_CFA(reg,off) .cfi_def_cfa reg,off
#define CFI_ENDPROC() .cfi_endproc
#else
#define CFI_STARTPROC()
#define CFI_OFFSET(reg,off)
#define CFI_DEF_CFA(reg,off)
#define CFI_ENDPROC()
#endif
#ifdef __MINT__
#define CALLFUNC(funcname) _ ## funcname
#else
#define CALLFUNC(funcname) funcname
#endif
.text
.globl CALLFUNC(ffi_call_SYSV)
.type CALLFUNC(ffi_call_SYSV),@function
.align 4
CALLFUNC(ffi_call_SYSV):
CFI_STARTPROC()
link %fp,#0
CFI_OFFSET(14,-8)
CFI_DEF_CFA(14,8)
move.l %d2,-(%sp)
CFI_OFFSET(2,-12)
| Make room for all of the new args.
sub.l 12(%fp),%sp
| Call ffi_prep_args
move.l 8(%fp),-(%sp)
pea 4(%sp)
#if !defined __PIC__
jsr CALLFUNC(ffi_prep_args)
#else
bsr.l CALLFUNC(ffi_prep_args@PLTPC)
#endif
addq.l #8,%sp
| Pass pointer to struct value, if any
#ifdef __MINT__
move.l %d0,%a1
#else
move.l %a0,%a1
#endif
| Call the function
move.l 24(%fp),%a0
jsr (%a0)
| Remove the space we pushed for the args
add.l 12(%fp),%sp
| Load the pointer to storage for the return value
move.l 20(%fp),%a1
| Load the return type code
move.l 16(%fp),%d2
| If the return value pointer is NULL, assume no return value.
| NOTE: On the mc68000, tst on an address register is not supported.
#if !defined(__mc68020__) && !defined(__mc68030__) && !defined(__mc68040__) && !defined(__mc68060__) && !defined(__mcoldfire__)
cmp.w #0, %a1
#else
tst.l %a1
#endif
jbeq noretval
btst #0,%d2
jbeq retlongint
move.l %d0,(%a1)
jbra epilogue
retlongint:
btst #1,%d2
jbeq retfloat
move.l %d0,(%a1)
move.l %d1,4(%a1)
jbra epilogue
retfloat:
btst #2,%d2
jbeq retdouble
#if defined(__MC68881__) || defined(__HAVE_68881__)
fmove.s %fp0,(%a1)
#else
move.l %d0,(%a1)
#endif
jbra epilogue
retdouble:
btst #3,%d2
jbeq retlongdouble
#if defined(__MC68881__) || defined(__HAVE_68881__)
fmove.d %fp0,(%a1)
#else
move.l %d0,(%a1)+
move.l %d1,(%a1)
#endif
jbra epilogue
retlongdouble:
btst #4,%d2
jbeq retpointer
#if defined(__MC68881__) || defined(__HAVE_68881__)
fmove.x %fp0,(%a1)
#else
move.l %d0,(%a1)+
move.l %d1,(%a1)+
move.l %d2,(%a1)
#endif
jbra epilogue
retpointer:
btst #5,%d2
jbeq retstruct1
#ifdef __MINT__
move.l %d0,(%a1)
#else
move.l %a0,(%a1)
#endif
jbra epilogue
retstruct1:
btst #6,%d2
jbeq retstruct2
move.b %d0,(%a1)
jbra epilogue
retstruct2:
btst #7,%d2
jbeq retsint8
move.w %d0,(%a1)
jbra epilogue
retsint8:
btst #8,%d2
jbeq retsint16
| NOTE: On the mc68000, extb is not supported. 8->16, then 16->32.
#if !defined(__mc68020__) && !defined(__mc68030__) && !defined(__mc68040__) && !defined(__mc68060__) && !defined(__mcoldfire__)
ext.w %d0
ext.l %d0
#else
extb.l %d0
#endif
move.l %d0,(%a1)
jbra epilogue
retsint16:
btst #9,%d2
jbeq noretval
ext.l %d0
move.l %d0,(%a1)
noretval:
epilogue:
move.l (%sp)+,%d2
unlk %fp
rts
CFI_ENDPROC()
.size CALLFUNC(ffi_call_SYSV),.-CALLFUNC(ffi_call_SYSV)
.globl CALLFUNC(ffi_closure_SYSV)
.type CALLFUNC(ffi_closure_SYSV), @function
.align 4
CALLFUNC(ffi_closure_SYSV):
CFI_STARTPROC()
link %fp,#-12
CFI_OFFSET(14,-8)
CFI_DEF_CFA(14,8)
move.l %sp,-12(%fp)
pea 8(%fp)
pea -12(%fp)
move.l %a0,-(%sp)
#if !defined __PIC__
jsr CALLFUNC(ffi_closure_SYSV_inner)
#else
bsr.l CALLFUNC(ffi_closure_SYSV_inner@PLTPC)
#endif
lsr.l #1,%d0
jne 1f
jcc .Lcls_epilogue
| CIF_FLAGS_INT
move.l -12(%fp),%d0
.Lcls_epilogue:
| no CIF_FLAGS_*
unlk %fp
rts
1:
lea -12(%fp),%a0
lsr.l #2,%d0
jne 1f
jcs .Lcls_ret_float
| CIF_FLAGS_DINT
move.l (%a0)+,%d0
move.l (%a0),%d1
jra .Lcls_epilogue
.Lcls_ret_float:
#if defined(__MC68881__) || defined(__HAVE_68881__)
fmove.s (%a0),%fp0
#else
move.l (%a0),%d0
#endif
jra .Lcls_epilogue
1:
lsr.l #2,%d0
jne 1f
jcs .Lcls_ret_ldouble
| CIF_FLAGS_DOUBLE
#if defined(__MC68881__) || defined(__HAVE_68881__)
fmove.d (%a0),%fp0
#else
move.l (%a0)+,%d0
move.l (%a0),%d1
#endif
jra .Lcls_epilogue
.Lcls_ret_ldouble:
#if defined(__MC68881__) || defined(__HAVE_68881__)
fmove.x (%a0),%fp0
#else
move.l (%a0)+,%d0
move.l (%a0)+,%d1
move.l (%a0),%d2
#endif
jra .Lcls_epilogue
1:
lsr.l #2,%d0
jne 1f
jcs .Lcls_ret_struct1
| CIF_FLAGS_POINTER
move.l (%a0),%a0
move.l %a0,%d0
jra .Lcls_epilogue
.Lcls_ret_struct1:
move.b (%a0),%d0
jra .Lcls_epilogue
1:
lsr.l #2,%d0
jne 1f
jcs .Lcls_ret_sint8
| CIF_FLAGS_STRUCT2
move.w (%a0),%d0
jra .Lcls_epilogue
.Lcls_ret_sint8:
move.l (%a0),%d0
| NOTE: On the mc68000, extb is not supported. 8->16, then 16->32.
#if !defined(__mc68020__) && !defined(__mc68030__) && !defined(__mc68040__) && !defined(__mc68060__) && !defined(__mcoldfire__)
ext.w %d0
ext.l %d0
#else
extb.l %d0
#endif
jra .Lcls_epilogue
1:
| CIF_FLAGS_SINT16
move.l (%a0),%d0
ext.l %d0
jra .Lcls_epilogue
CFI_ENDPROC()
.size CALLFUNC(ffi_closure_SYSV),.-CALLFUNC(ffi_closure_SYSV)
.globl CALLFUNC(ffi_closure_struct_SYSV)
.type CALLFUNC(ffi_closure_struct_SYSV), @function
.align 4
CALLFUNC(ffi_closure_struct_SYSV):
CFI_STARTPROC()
link %fp,#0
CFI_OFFSET(14,-8)
CFI_DEF_CFA(14,8)
move.l %sp,-12(%fp)
pea 8(%fp)
move.l %a1,-(%sp)
move.l %a0,-(%sp)
#if !defined __PIC__
jsr CALLFUNC(ffi_closure_SYSV_inner)
#else
bsr.l CALLFUNC(ffi_closure_SYSV_inner@PLTPC)
#endif
unlk %fp
rts
CFI_ENDPROC()
.size CALLFUNC(ffi_closure_struct_SYSV),.-CALLFUNC(ffi_closure_struct_SYSV)
#if defined __ELF__ && defined __linux__
.section .note.GNU-stack,"",@progbits
#endif
|
