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/* -----------------------------------------------------------------------
sysv.S - Copyright (c) 2004 Renesas Technology
M32R 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 RENESAS TECHNOLOGY 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_MACHINE_ASM_H
#include <machine/asm.h>
#else
/* XXX these lose for some platforms, I'm sure. */
#define CNAME(x) x
#define ENTRY(x) .globl CNAME(x)! .type CNAME(x),%function! CNAME(x):
#endif
.text
/* R0: ffi_prep_args */
/* R1: &ecif */
/* R2: cif->bytes */
/* R3: fig->flags */
/* sp+0: ecif.rvalue */
/* sp+4: fn */
/* This assumes we are using gas. */
ENTRY(ffi_call_SYSV)
/* Save registers. */
push fp
push lr
push r3
push r2
push r1
push r0
mv fp, sp
/* Make room for all of the new args. */
sub sp, r2
/* Place all of the ffi_prep_args in position. */
mv lr, r0
mv r0, sp
/* R1 already set. */
/* And call. */
jl lr
/* Move first 4 parameters in registers... */
ld r0, @(0,sp)
ld r1, @(4,sp)
ld r2, @(8,sp)
ld r3, @(12,sp)
/* ...and adjust the stack. */
ld lr, @(8,fp)
cmpi lr, #16
bc adjust_stack
ldi lr, #16
adjust_stack:
add sp, lr
/* Call the function. */
ld lr, @(28,fp)
jl lr
/* Remove the space we pushed for the args. */
mv sp, fp
/* Load R2 with the pointer to storage for the return value. */
ld r2, @(24,sp)
/* Load R3 with the return type code. */
ld r3, @(12,sp)
/* If the return value pointer is NULL, assume no return value. */
beqz r2, epilogue
/* Return INT. */
ldi r4, #FFI_TYPE_INT
bne r3, r4, return_double
st r0, @r2
bra epilogue
return_double:
/* Return DOUBLE or LONGDOUBLE. */
ldi r4, #FFI_TYPE_DOUBLE
bne r3, r4, epilogue
st r0, @r2
st r1, @(4,r2)
epilogue:
pop r0
pop r1
pop r2
pop r3
pop lr
pop fp
jmp lr
.ffi_call_SYSV_end:
.size CNAME(ffi_call_SYSV),.ffi_call_SYSV_end-CNAME(ffi_call_SYSV)
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