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/*
* Copyright (c) 2013 Miodrag Vallat. <miod@openbsd.org>
*
* 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.
*/
/*
* m88k Foreign Function Interface
*/
#define LIBFFI_ASM
#include <fficonfig.h>
#include <ffi.h>
.text
/*
* ffi_cacheflush_OBSD(unsigned int addr, %r2
* unsigned int size); %r3
*/
.align 4
.globl ffi_cacheflush_OBSD
.type ffi_cacheflush_OBSD,@function
ffi_cacheflush_OBSD:
tb0 0, %r0, 451
or %r0, %r0, %r0
jmp %r1
.size ffi_cacheflush_OBSD, . - ffi_cacheflush_OBSD
/*
* ffi_call_OBSD(unsigned bytes, %r2
* extended_cif *ecif, %r3
* unsigned flags, %r4
* void *rvalue, %r5
* void (*fn)()); %r6
*/
.align 4
.globl ffi_call_OBSD
.type ffi_call_OBSD,@function
ffi_call_OBSD:
subu %r31, %r31, 32
st %r30, %r31, 4
st %r1, %r31, 0
addu %r30, %r31, 32
| Save the few arguments we'll need after ffi_prep_args()
st.d %r4, %r31, 8
st %r6, %r31, 16
| Allocate room for the image of r2-r9, and the stack space for
| the args (rounded to a 16-byte boundary)
addu %r2, %r2, (8 * 4) + 15
clr %r2, %r2, 4<0>
subu %r31, %r31, %r2
| Fill register and stack image
or %r2, %r31, %r0
#ifdef PIC
bsr ffi_prep_args#plt
#else
bsr ffi_prep_args
#endif
| Save pointer to return struct address, if any
or %r12, %r2, %r0
| Get function pointer
subu %r4, %r30, 32
ld %r1, %r4, 16
| Fetch the register arguments
ld.d %r2, %r31, (0 * 4)
ld.d %r4, %r31, (2 * 4)
ld.d %r6, %r31, (4 * 4)
ld.d %r8, %r31, (6 * 4)
addu %r31, %r31, (8 * 4)
| Invoke the function
jsr %r1
| Restore stack now that we don't need the args anymore
subu %r31, %r30, 32
| Figure out what to return as the function's return value
ld %r5, %r31, 12 | rvalue
ld %r4, %r31, 8 | flags
bcnd eq0, %r5, 9f
bb0 0, %r4, 1f | CIF_FLAGS_INT
st %r2, %r5, 0
br 9f
1:
bb0 1, %r4, 1f | CIF_FLAGS_DINT
st.d %r2, %r5, 0
br 9f
1:
9:
ld %r1, %r31, 0
ld %r30, %r31, 4
jmp.n %r1
addu %r31, %r31, 32
.size ffi_call_OBSD, . - ffi_call_OBSD
/*
* ffi_closure_OBSD(ffi_closure *closure); %r13
*/
.align 4
.globl ffi_closure_OBSD
.type ffi_closure_OBSD, @function
ffi_closure_OBSD:
subu %r31, %r31, 16
st %r30, %r31, 4
st %r1, %r31, 0
addu %r30, %r31, 16
| Make room on the stack for saved register arguments and return
| value
subu %r31, %r31, (8 * 4) + (2 * 4)
st.d %r2, %r31, (0 * 4)
st.d %r4, %r31, (2 * 4)
st.d %r6, %r31, (4 * 4)
st.d %r8, %r31, (6 * 4)
| Invoke the closure function
or %r5, %r30, 0 | calling stack
addu %r4, %r31, 0 | saved registers
addu %r3, %r31, (8 * 4) | return value
or %r2, %r13, %r0 | closure
#ifdef PIC
bsr ffi_closure_OBSD_inner#plt
#else
bsr ffi_closure_OBSD_inner
#endif
| Figure out what to return as the function's return value
bb0 0, %r2, 1f | CIF_FLAGS_INT
ld %r2, %r31, (8 * 4)
br 9f
1:
bb0 1, %r2, 1f | CIF_FLAGS_DINT
ld.d %r2, %r31, (8 * 4)
br 9f
1:
9:
subu %r31, %r30, 16
ld %r1, %r31, 0
ld %r30, %r31, 4
jmp.n %r1
addu %r31, %r31, 16
.size ffi_closure_OBSD,.-ffi_closure_OBSD
/*
* ffi_closure_struct_OBSD(ffi_closure *closure); %r13
*/
.align 4
.globl ffi_closure_struct_OBSD
.type ffi_closure_struct_OBSD, @function
ffi_closure_struct_OBSD:
subu %r31, %r31, 16
st %r30, %r31, 4
st %r1, %r31, 0
addu %r30, %r31, 16
| Make room on the stack for saved register arguments
subu %r31, %r31, (8 * 4)
st.d %r2, %r31, (0 * 4)
st.d %r4, %r31, (2 * 4)
st.d %r6, %r31, (4 * 4)
st.d %r8, %r31, (6 * 4)
| Invoke the closure function
or %r5, %r30, 0 | calling stack
addu %r4, %r31, 0 | saved registers
or %r3, %r12, 0 | return value
or %r2, %r13, %r0 | closure
#ifdef PIC
bsr ffi_closure_OBSD_inner#plt
#else
bsr ffi_closure_OBSD_inner
#endif
subu %r31, %r30, 16
ld %r1, %r31, 0
ld %r30, %r31, 4
jmp.n %r1
addu %r31, %r31, 16
.size ffi_closure_struct_OBSD,.-ffi_closure_struct_OBSD
|
