1 /* ----------------------------------------------------------------------- 2 sysv.S - Copyright (c) 2004 Renesas Technology 3 4 M32R Foreign Function Interface 5 6 Permission is hereby granted, free of charge, to any person obtaining 7 a copy of this software and associated documentation files (the 8 ``Software''), to deal in the Software without restriction, including 9 without limitation the rights to use, copy, modify, merge, publish, 10 distribute, sublicense, and/or sell copies of the Software, and to 11 permit persons to whom the Software is furnished to do so, subject to 12 the following conditions: 13 14 The above copyright notice and this permission notice shall be included 15 in all copies or substantial portions of the Software. 16 17 THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS 18 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 19 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 20 IN NO EVENT SHALL RENESAS TECHNOLOGY BE LIABLE FOR ANY CLAIM, DAMAGES OR 21 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 22 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 23 OTHER DEALINGS IN THE SOFTWARE. 24 ----------------------------------------------------------------------- */ 25 26 #define LIBFFI_ASM 27 #include <fficonfig.h> 28 #include <ffi.h> 29 #ifdef HAVE_MACHINE_ASM_H 30 #include <machine/asm.h> 31 #else 32 /* XXX these lose for some platforms, I'm sure. */ 33 #define CNAME(x) x 34 #define ENTRY(x) .globl CNAME(x)! .type CNAME(x),%function! CNAME(x): 35 #endif 36 37 .text 38 39 /* R0: ffi_prep_args */ 40 /* R1: &ecif */ 41 /* R2: cif->bytes */ 42 /* R3: fig->flags */ 43 /* sp+0: ecif.rvalue */ 44 /* sp+4: fn */ 45 46 /* This assumes we are using gas. */ 47 ENTRY(ffi_call_SYSV) 48 /* Save registers. */ 49 push fp 50 push lr 51 push r3 52 push r2 53 push r1 54 push r0 55 mv fp, sp 56 57 /* Make room for all of the new args. */ 58 sub sp, r2 59 60 /* Place all of the ffi_prep_args in position. */ 61 mv lr, r0 62 mv r0, sp 63 /* R1 already set. */ 64 65 /* And call. */ 66 jl lr 67 68 /* Move first 4 parameters in registers... */ 69 ld r0, @(0,sp) 70 ld r1, @(4,sp) 71 ld r2, @(8,sp) 72 ld r3, @(12,sp) 73 74 /* ...and adjust the stack. */ 75 ld lr, @(8,fp) 76 cmpi lr, #16 77 bc adjust_stack 78 ldi lr, #16 79 adjust_stack: 80 add sp, lr 81 82 /* Call the function. */ 83 ld lr, @(28,fp) 84 jl lr 85 86 /* Remove the space we pushed for the args. */ 87 mv sp, fp 88 89 /* Load R2 with the pointer to storage for the return value. */ 90 ld r2, @(24,sp) 91 92 /* Load R3 with the return type code. */ 93 ld r3, @(12,sp) 94 95 /* If the return value pointer is NULL, assume no return value. */ 96 beqz r2, epilogue 97 98 /* Return INT. */ 99 ldi r4, #FFI_TYPE_INT 100 bne r3, r4, return_double 101 st r0, @r2 102 bra epilogue 103 104 return_double: 105 /* Return DOUBLE or LONGDOUBLE. */ 106 ldi r4, #FFI_TYPE_DOUBLE 107 bne r3, r4, epilogue 108 st r0, @r2 109 st r1, @(4,r2) 110 111 epilogue: 112 pop r0 113 pop r1 114 pop r2 115 pop r3 116 pop lr 117 pop fp 118 jmp lr 119 120 .ffi_call_SYSV_end: 121 .size CNAME(ffi_call_SYSV),.ffi_call_SYSV_end-CNAME(ffi_call_SYSV) 122
