-----------------------------------------------------------------------

sysv.S - Copyright (c) 1998 Andreas Schwab
         Copyright (c) 2008 Red Hat, Inc. 

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

.text

.globl  ffi_call_SYSV
.type   ffi_call_SYSV,@function
.align  4

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     ffi_prep_args

else

bsr.l   ffi_prep_args@PLTPC

endif

addq.l  #8,%sp  

| Pass pointer to struct value, if any
move.l  %a0,%a1

| 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(mc68000) && !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)

fmove.s %fp0,(%a1)

else

move.l  %d0,(%a1)

endif

jbra    epilogue

retdouble:

btst    #3,%d2
jbeq    retlongdouble

if defined(MC68881)

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)

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
move.l  %a0,(%a1)
jbra    epilogue

retstruct1:

btst    #6,%d2
jbeq    retstruct2
move.b  %d0,(%a1)
jbra    epilogue

retstruct2:

btst    #7,%d2
jbeq    noretval
move.w  %d0,(%a1)

noretval: epilogue:

move.l  (%sp)+,%d2
unlk    %fp
rts
CFI_ENDPROC()
.size   ffi_call_SYSV,.-ffi_call_SYSV

.globl  ffi_closure_SYSV
.type   ffi_closure_SYSV, @function
.align  4

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     ffi_closure_SYSV_inner

else

bsr.l   ffi_closure_SYSV_inner@PLTPC

endif

lsr.l   #1,%d0
jne     1f
jcc     .Lcls_epilogue
move.l  -12(%fp),%d0

.Lcls_epilogue:

unlk    %fp
rts

1:

lea     -12(%fp),%a0
lsr.l   #2,%d0
jne     1f
jcs     .Lcls_ret_float
move.l  (%a0)+,%d0
move.l  (%a0),%d1
jra     .Lcls_epilogue

.Lcls_ret_float: if defined(MC68881)

fmove.s (%a0),%fp0

else

move.l  (%a0),%d0

endif

jra     .Lcls_epilogue

1:

lsr.l   #2,%d0
jne     1f
jcs     .Lcls_ret_ldouble

if defined(MC68881)

fmove.d (%a0),%fp0

else

move.l  (%a0)+,%d0
move.l  (%a0),%d1

endif

jra     .Lcls_epilogue

.Lcls_ret_ldouble: if defined(MC68881)

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     .Lcls_ret_struct2
jcs     .Lcls_ret_struct1
move.l  (%a0),%a0
move.l  %a0,%d0
jra     .Lcls_epilogue

.Lcls_ret_struct1:

move.b  (%a0),%d0
jra     .Lcls_epilogue

.Lcls_ret_struct2:

move.w  (%a0),%d0
jra     .Lcls_epilogue
CFI_ENDPROC()

.size   ffi_closure_SYSV,.-ffi_closure_SYSV

.globl  ffi_closure_struct_SYSV
.type   ffi_closure_struct_SYSV, @function
.align  4

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     ffi_closure_SYSV_inner

else

bsr.l   ffi_closure_SYSV_inner@PLTPC

endif

unlk    %fp
rts
CFI_ENDPROC()
.size   ffi_closure_struct_SYSV,.-ffi_closure_struct_SYSV

if defined __ELF__ && defined __linux__

.section        .note.GNU-stack,"",@progbits

endif