1 /* ----------------------------------------------------------------------- 2 eabi.S - Copyright (c) 2004 Anthony Green 3 4 FR-V Assembly glue. 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 THE AUTHOR 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 30 .globl ffi_prep_args_EABI 31 32 .text 33 .p2align 4 34 .globl ffi_call_EABI 35 .type ffi_call_EABI, @function 36 37 # gr8 : ffi_prep_args 38 # gr9 : &ecif 39 # gr10: cif->bytes 40 # gr11: fig->flags 41 # gr12: ecif.rvalue 42 # gr13: fn 43 44 ffi_call_EABI: 45 addi sp, #-80, sp 46 sti fp, @(sp, #24) 47 addi sp, #24, fp 48 movsg lr, gr5 49 50 /* Make room for the new arguments. */ 51 /* subi sp, fp, gr10 */ 52 53 /* Store return address and incoming args on stack. */ 54 sti gr5, @(fp, #8) 55 sti gr8, @(fp, #-4) 56 sti gr9, @(fp, #-8) 57 sti gr10, @(fp, #-12) 58 sti gr11, @(fp, #-16) 59 sti gr12, @(fp, #-20) 60 sti gr13, @(fp, #-24) 61 62 sub sp, gr10, sp 63 64 /* Call ffi_prep_args. */ 65 ldi @(fp, #-4), gr4 66 addi sp, #0, gr8 67 ldi @(fp, #-8), gr9 68 #ifdef __FRV_FDPIC__ 69 ldd @(gr4, gr0), gr14 70 calll @(gr14, gr0) 71 #else 72 calll @(gr4, gr0) 73 #endif 74 75 /* ffi_prep_args returns the new stack pointer. */ 76 mov gr8, gr4 77 78 ldi @(sp, #0), gr8 79 ldi @(sp, #4), gr9 80 ldi @(sp, #8), gr10 81 ldi @(sp, #12), gr11 82 ldi @(sp, #16), gr12 83 ldi @(sp, #20), gr13 84 85 /* Always copy the return value pointer into the hidden 86 parameter register. This is only strictly necessary 87 when we're returning an aggregate type, but it doesn't 88 hurt to do this all the time, and it saves a branch. */ 89 ldi @(fp, #-20), gr3 90 91 /* Use the ffi_prep_args return value for the new sp. */ 92 mov gr4, sp 93 94 /* Call the target function. */ 95 ldi @(fp, -24), gr4 96 #ifdef __FRV_FDPIC__ 97 ldd @(gr4, gr0), gr14 98 calll @(gr14, gr0) 99 #else 100 calll @(gr4, gr0) 101 #endif 102 103 /* Store the result. */ 104 ldi @(fp, #-16), gr10 /* fig->flags */ 105 ldi @(fp, #-20), gr4 /* ecif.rvalue */ 106 107 /* Is the return value stored in two registers? */ 108 cmpi gr10, #8, icc0 109 bne icc0, 0, .L2 110 /* Yes, save them. */ 111 sti gr8, @(gr4, #0) 112 sti gr9, @(gr4, #4) 113 bra .L3 114 .L2: 115 /* Is the return value a structure? */ 116 cmpi gr10, #-1, icc0 117 beq icc0, 0, .L3 118 /* No, save a 4 byte return value. */ 119 sti gr8, @(gr4, #0) 120 .L3: 121 122 /* Restore the stack, and return. */ 123 ldi @(fp, 8), gr5 124 ld @(fp, gr0), fp 125 addi sp,#80,sp 126 jmpl @(gr5,gr0) 127 .size ffi_call_EABI, .-ffi_call_EABI 128 129
