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Diffstat (limited to 'libffi/src/csky/sysv.S')
| -rw-r--r-- | libffi/src/csky/sysv.S | 371 |
1 files changed, 371 insertions, 0 deletions
diff --git a/libffi/src/csky/sysv.S b/libffi/src/csky/sysv.S new file mode 100644 index 0000000..21670bf --- /dev/null +++ b/libffi/src/csky/sysv.S @@ -0,0 +1,371 @@ +/* ----------------------------------------------------------------------- + sysv.S + + CSKY 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> + +.macro CSKY_FUNC_START name + .text + .align 2 + .globl \name + .type \name, @function + \name: +.endm + +#ifdef __CSKYABIV2__ + + /* + * a0: fn + * a1: &ecif + * a2: cif->bytes + * a3: fig->flags + * sp+0: ecif.rvalue + */ +CSKY_FUNC_START ffi_call_SYSV + /* Save registers */ + .cfi_startproc + subi sp, 28 + .cfi_def_cfa_offset 28 + stw a0, (sp, 0x0) + .cfi_offset 0, -28 + stw a1, (sp, 0x4) + .cfi_offset 1, -24 + stw a2, (sp, 0x8) + .cfi_offset 2, -20 + stw a3, (sp, 0xC) + .cfi_offset 3, -16 + stw l0, (sp, 0x10) + .cfi_offset 4, -12 + stw l1, (sp, 0x14) + .cfi_offset 5, -8 + stw lr, (sp, 0x18) + .cfi_offset 15, -4 + + mov l0, sp + .cfi_def_cfa_register 4 + + /* Make room for all of the new args. */ + subu sp, sp, a2 + + /* Place all of the ffi_prep_args in position */ + mov a0, sp + /* a1 already set */ + + /* Call ffi_prep_args(stack, &ecif) */ + jsri ffi_prep_args + + /* move first 4 parameters in registers */ + ldw a0, (sp, 0x0) + ldw a1, (sp, 0x4) + ldw a2, (sp, 0x8) + ldw a3, (sp, 0xC) + + /* and adjust stack */ + subu lr, l0, sp /* cif->bytes == l0 - sp */ + cmphsi lr, 16 + movi l1, 16 + movt lr, l1 + addu sp, sp, lr + + ldw l1, (l0, 0) /* load fn() in advance */ + + /* call (fn) (...) */ + jsr l1 + + /* Remove the space we pushed for the args */ + mov sp, l0 + + /* Load r2 with the pointer to storage for the return value */ + ldw a2, (sp, 0x1C) + + /* Load r3 with the return type code */ + ldw a3, (sp, 0xC) + + /* If the return value pointer is NULL, assume no return value. */ + cmpnei a2, 0 + bf .Lepilogue + + cmpnei a3, FFI_TYPE_STRUCT + bf .Lepilogue + + /* return INT64 */ + cmpnei a3, FFI_TYPE_SINT64 + bt .Lretint + /* stw a0, (a2, 0x0) at .Lretint */ + stw a1, (a2, 0x4) + +.Lretint: + /* return INT */ + stw a0, (a2, 0x0) + +.Lepilogue: + ldw a0, (sp, 0x0) + ldw a1, (sp, 0x4) + ldw a2, (sp, 0x8) + ldw a3, (sp, 0xC) + ldw l0, (sp, 0x10) + ldw l1, (sp, 0x14) + ldw lr, (sp, 0x18) + addi sp, sp, 28 + rts + .cfi_endproc + .size ffi_call_SYSV, .-ffi_call_SYSV + + + /* + * unsigned int FFI_HIDDEN + * ffi_closure_SYSV_inner (closure, respp, args) + * ffi_closure *closure; + * void **respp; + * void *args; + */ +CSKY_FUNC_START ffi_closure_SYSV + .cfi_startproc + mov a2, sp + addi a1, sp, 16 + subi sp, sp, 24 + .cfi_def_cfa_offset 40 + stw a1, (sp, 0x10) + .cfi_offset 1, -24 + stw lr, (sp, 0x14) + .cfi_offset 15, -20 + stw sp, (sp, 0x8) + addi a1, sp, 8 + jsri ffi_closure_SYSV_inner + ldw a0, (sp, 0x0) + /* + * if FFI_TYPE_SINT64, need a1. + * if FFI_TYPE_INT, ignore a1. + */ + ldw a1, (sp, 0x4) + + ldw lr, (sp, 0x14) + addi sp, sp, 40 + rts + .cfi_endproc + .size ffi_closure_SYSV, .-ffi_closure_SYSV + +CSKY_FUNC_START ffi_csky_trampoline + subi sp, sp, 16 + stw a0, (sp, 0x0) + stw a1, (sp, 0x4) + stw a2, (sp, 0x8) + stw a3, (sp, 0xC) + lrw a0, [.Lctx] + lrw a1, [.Lfun] + jmp a1 +.Lctx: + mov a0, a0 + mov a0, a0 +.Lfun: + + .size ffi_csky_trampoline, .-ffi_csky_trampoline + +CSKY_FUNC_START ffi_csky_cacheflush + mov t0, r7 + movi r7, 123 + trap 0 + mov r7, t0 + rts + + .size ffi_csky_cacheflush, .-ffi_csky_cacheflush + +#else /* !__CSKYABIV2__ */ + + /* + * a0: fn + * a1: &ecif + * a2: cif->bytes + * a3: fig->flags + * a4: ecif.rvalue + */ +CSKY_FUNC_START ffi_call_SYSV + /* Save registers */ + .cfi_startproc + subi sp, 32 + subi sp, 8 + .cfi_def_cfa_offset 40 + stw a0, (sp, 0x0) + .cfi_offset 2, -40 + stw a1, (sp, 0x4) + .cfi_offset 3, -36 + stw a2, (sp, 0x8) + .cfi_offset 4, -32 + stw a3, (sp, 0xC) + .cfi_offset 5, -28 + stw a4, (sp, 0x10) + .cfi_offset 6, -24 + stw a5, (sp, 0x14) + .cfi_offset 7, -20 + stw l0, (sp, 0x18) + .cfi_offset 8, -16 + stw l1, (sp, 0x1C) + .cfi_offset 9, -12 + stw lr, (sp, 0x20) + .cfi_offset 15, -8 + + mov l0, sp + .cfi_def_cfa_register 8 + + /* Make room for all of the new args. */ + subu sp, sp, a2 + + /* Place all of the ffi_prep_args in position */ + mov a0, sp + /* a1 already set */ + + /* Call ffi_prep_args(stack, &ecif) */ + jsri ffi_prep_args + + /* move first 4 parameters in registers */ + ldw a0, (sp, 0x0) + ldw a1, (sp, 0x4) + ldw a2, (sp, 0x8) + ldw a3, (sp, 0xC) + ldw a4, (sp, 0x10) + ldw a5, (sp, 0x14) + + /* and adjust stack */ + mov lr, l0 + subu lr, sp /* cif->bytes == l0 - sp */ + movi l1, 24 + cmphs lr, l1 + movt lr, l1 + addu sp, sp, lr + + ldw l1, (l0, 0) /* load fn() in advance */ + + /* call (fn) (...) */ + jsr l1 + + /* Remove the space we pushed for the args */ + mov sp, l0 + + /* Load r2 with the pointer to storage for the return value */ + ldw a2, (sp, 0x10) + + /* Load r3 with the return type code */ + ldw a3, (sp, 0xC) + + /* If the return value pointer is NULL, assume no return value. */ + cmpnei a2, 0 + bf .Lepilogue + + cmpnei a3, FFI_TYPE_STRUCT + bf .Lepilogue + + /* return INT64 */ + cmpnei a3, FFI_TYPE_SINT64 + bt .Lretint + /* stw a0, (a2, 0x0) at .Lretint */ + stw a1, (a2, 0x4) + +.Lretint: + /* return INT */ + stw a0, (a2, 0x0) + +.Lepilogue: + ldw a0, (sp, 0x0) + ldw a1, (sp, 0x4) + ldw a2, (sp, 0x8) + ldw a3, (sp, 0xC) + ldw a4, (sp, 0x10) + ldw a5, (sp, 0x14) + ldw l0, (sp, 0x18) + ldw l1, (sp, 0x1C) + ldw lr, (sp, 0x20) + addi sp, sp, 32 + addi sp, sp, 8 + rts + .cfi_endproc + + .size ffi_call_SYSV, .-ffi_call_SYSV + + + /* + * unsigned int FFI_HIDDEN + * ffi_closure_SYSV_inner (closure, respp, args) + * ffi_closure *closure; + * void **respp; + * void *args; + */ +CSKY_FUNC_START ffi_closure_SYSV + .cfi_startproc + mov a2, sp + mov a1, sp + addi a1, 24 + subi sp, sp, 24 + .cfi_def_cfa_offset 48 + stw a1, (sp, 0x10) + .cfi_offset 3, -32 + stw lr, (sp, 0x14) + .cfi_offset 15, -28 + stw sp, (sp, 0x8) + mov a1, sp + addi a1, 8 + jsri ffi_closure_SYSV_inner + ldw a0, (sp, 0x0) + /* + * if FFI_TYPE_SINT64, need a1. + * if FFI_TYPE_INT, ignore a1. + */ + ldw a1, (sp, 0x4) + + ldw lr, (sp, 0x14) + addi sp, sp, 24 + addi sp, sp, 24 + rts + .cfi_endproc + + .size ffi_closure_SYSV, .-ffi_closure_SYSV + +CSKY_FUNC_START ffi_csky_trampoline + subi sp, 24 + stw a0, (sp, 0x0) + stw a1, (sp, 0x4) + stw a2, (sp, 0x8) + stw a3, (sp, 0xC) + stw a4, (sp, 0x10) + stw a5, (sp, 0x14) + lrw a0, [.Lctx] + lrw a1, [.Lfun] + jmp a1 +.Lctx: + mov a0, a0 + mov a0, a0 +.Lfun: + + .size ffi_csky_trampoline, .-ffi_csky_trampoline + +CSKY_FUNC_START ffi_csky_cacheflush + lrw r1, 123 + trap 0 + rts + + .size ffi_csky_cacheflush, .-ffi_csky_cacheflush + +#endif /* __CSKYABIV2__ */ |