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Diffstat (limited to 'libffi/src/m88k/obsd.S')
| -rw-r--r-- | libffi/src/m88k/obsd.S | 209 |
1 files changed, 209 insertions, 0 deletions
diff --git a/libffi/src/m88k/obsd.S b/libffi/src/m88k/obsd.S new file mode 100644 index 00000000000..1944a23de42 --- /dev/null +++ b/libffi/src/m88k/obsd.S @@ -0,0 +1,209 @@ +/* + * 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 |