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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
|
|
