| 1 | /* -----------------------------------------------------------------------
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| 2 | darwin_closure.S - Copyright (c) 2002 2003 Free Software Foundation,
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| 3 | Inc. based on ppc_closure.S
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| 4 |
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| 5 | PowerPC Assembly glue.
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| 6 |
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| 7 | Permission is hereby granted, free of charge, to any person obtaining
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| 8 | a copy of this software and associated documentation files (the
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| 9 | ``Software''), to deal in the Software without restriction, including
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| 10 | without limitation the rights to use, copy, modify, merge, publish,
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| 11 | distribute, sublicense, and/or sell copies of the Software, and to
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| 12 | permit persons to whom the Software is furnished to do so, subject to
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| 13 | the following conditions:
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| 14 |
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| 15 | The above copyright notice and this permission notice shall be included
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| 16 | in all copies or substantial portions of the Software.
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| 17 |
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| 18 | THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
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| 19 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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| 20 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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| 21 | IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
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| 22 | OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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| 23 | ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 24 | OTHER DEALINGS IN THE SOFTWARE.
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| 25 | ----------------------------------------------------------------------- */
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| 26 |
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| 27 | #define LIBFFI_ASM
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| 28 | #define JUMPTARGET(name) name
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| 29 | #define L(x) x
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| 30 | .text
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| 31 | .globl _ffi_closure_helper_DARWIN
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| 32 |
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| 33 | .text
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| 34 | .align 2
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| 35 | .globl _ffi_closure_ASM
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| 36 |
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| 37 | .text
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| 38 | .align 2
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| 39 | _ffi_closure_ASM:
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| 40 | LFB1:
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| 41 | mflr r0 /* extract return address */
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| 42 | stw r0, 8(r1) /* save the return address */
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| 43 | LCFI0:
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| 44 | /* 24 Bytes (Linkage Area)
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| 45 | 32 Bytes (outgoing parameter area, always reserved)
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| 46 | 104 Bytes (13*8 from FPR)
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| 47 | 8 Bytes (result)
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| 48 | 168 Bytes */
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| 49 |
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| 50 | stwu r1,-176(r1) /* skip over caller save area
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| 51 | keep stack aligned to 16 */
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| 52 | LCFI1:
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| 53 | /* we want to build up an area for the parameters passed
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| 54 | in registers (both floating point and integer) */
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| 55 |
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| 56 | /* we store gpr 3 to gpr 10 (aligned to 4)
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| 57 | in the parents outgoing area */
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| 58 | stw r3, 200(r1)
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| 59 | stw r4, 204(r1)
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| 60 | stw r5, 208(r1)
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| 61 | stw r6, 212(r1)
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| 62 | stw r7, 216(r1)
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| 63 | stw r8, 220(r1)
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| 64 | stw r9, 224(r1)
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| 65 | stw r10, 228(r1)
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| 66 |
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| 67 | /* we save fpr 1 to fpr 13 (aligned to 8) */
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| 68 | stfd f1, 56(r1)
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| 69 | stfd f2, 64(r1)
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| 70 | stfd f3, 72(r1)
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| 71 | stfd f4, 80(r1)
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| 72 | stfd f5, 88(r1)
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| 73 | stfd f6, 96(r1)
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| 74 | stfd f7, 104(r1)
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| 75 | stfd f8, 112(r1)
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| 76 | stfd f9, 120(r1)
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| 77 | stfd f10, 128(r1)
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| 78 | stfd f11, 136(r1)
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| 79 | stfd f12, 144(r1)
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| 80 | stfd f13, 152(r1)
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| 81 |
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| 82 | /* set up registers for the routine that actually does the work */
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| 83 | /* get the context pointer from the trampoline */
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| 84 | mr r3,r11
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| 85 |
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| 86 | /* now load up the pointer to the result storage */
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| 87 | addi r4,r1,160
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| 88 |
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| 89 | /* now load up the pointer to the saved gpr registers */
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| 90 | addi r5,r1,200
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| 91 |
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| 92 | /* now load up the pointer to the saved fpr registers */
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| 93 | addi r6,r1,56
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| 94 |
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| 95 | /* now load up the pointer to the outgoing parameter
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| 96 | stack in the previous frame */
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| 97 | addi r7,r1,232
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| 98 |
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| 99 | /* make the call */
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| 100 | bl L(_ffi_closure_helper_DARWIN)
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| 101 |
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| 102 | /* now r3 contains the return type */
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| 103 | /* so use it to look up in a table */
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| 104 | /* so we know how to deal with each type */
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| 105 |
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| 106 | /* look up the proper starting point in table */
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| 107 | /* by using return type as offset */
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| 108 | addi r5,r1,160 /* get pointer to results area */
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| 109 | addis r4,0,ha16(.L60) /* get address of jump table */
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| 110 | addi r4,r4,lo16(.L60)
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| 111 | slwi r3,r3,2 /* now multiply return type by 4 */
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| 112 | lwzx r3,r4,r3 /* get the contents of that table value */
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| 113 | add r3,r3,r4 /* add contents of table to table address */
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| 114 | mtctr r3
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| 115 | bctr /* jump to it */
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| 116 | LFE1:
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| 117 | .align 2
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| 118 |
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| 119 | .L60:
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| 120 | .long .L44-.L60 /* FFI_TYPE_VOID */
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| 121 | .long .L50-.L60 /* FFI_TYPE_INT */
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| 122 | .long .L47-.L60 /* FFI_TYPE_FLOAT */
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| 123 | .long .L46-.L60 /* FFI_TYPE_DOUBLE */
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| 124 | .long .L46-.L60 /* FFI_TYPE_LONGDOUBLE */
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| 125 | .long .L56-.L60 /* FFI_TYPE_UINT8 */
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| 126 | .long .L55-.L60 /* FFI_TYPE_SINT8 */
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| 127 | .long .L58-.L60 /* FFI_TYPE_UINT16 */
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| 128 | .long .L57-.L60 /* FFI_TYPE_SINT16 */
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| 129 | .long .L50-.L60 /* FFI_TYPE_UINT32 */
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| 130 | .long .L50-.L60 /* FFI_TYPE_SINT32 */
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| 131 | .long .L48-.L60 /* FFI_TYPE_UINT64 */
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| 132 | .long .L48-.L60 /* FFI_TYPE_SINT64 */
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| 133 | .long .L44-.L60 /* FFI_TYPE_STRUCT */
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| 134 | .long .L50-.L60 /* FFI_TYPE_POINTER */
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| 135 |
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| 136 |
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| 137 | /* case double */
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| 138 | .L46:
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| 139 | lfd f1,0(r5)
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| 140 | b .L44
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| 141 |
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| 142 | /* case float */
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| 143 | .L47:
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| 144 | lfs f1,0(r5)
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| 145 | b .L44
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| 146 |
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| 147 | /* case long long */
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| 148 | .L48:
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| 149 | lwz r3,0(r5)
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| 150 | lwz r4,4(r5)
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| 151 | b .L44
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| 152 |
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| 153 | /* case default / int32 / pointer */
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| 154 | .L50:
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| 155 | lwz r3,0(r5)
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| 156 | b .L44
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| 157 |
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| 158 | /* case signed int8 */
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| 159 | .L55:
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| 160 | addi r5,r5,3
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| 161 | lbz r3,0(r5)
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| 162 | extsb r3,r3
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| 163 | b .L44
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| 164 |
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| 165 | /* case unsigned int8 */
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| 166 | .L56:
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| 167 | addi r5,r5,3
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| 168 | lbz r3,0(r5)
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| 169 | b .L44
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| 170 |
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| 171 | /* case signed int16 */
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| 172 | .L57:
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| 173 | addi r5,r5,2
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| 174 | lhz r3,0(r5)
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| 175 | extsh r3,r3
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| 176 | b .L44
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| 177 |
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| 178 | /* case unsigned int16 */
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| 179 | .L58:
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| 180 | addi r5,r5,2
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| 181 | lhz r3,0(r5)
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| 182 |
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| 183 | /* case void / done */
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| 184 | .L44:
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| 185 |
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| 186 | addi r1,r1,176 /* restore stack pointer */
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| 187 | lwz r0,8(r1) /* get return address */
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| 188 | mtlr r0 /* reset link register */
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| 189 | blr
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| 190 |
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| 191 | /* END(ffi_closure_ASM) */
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| 192 |
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| 193 | .data
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| 194 | .section __TEXT,__eh_frame
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| 195 | Lframe1:
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| 196 | .set L$set$0,LECIE1-LSCIE1
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| 197 | .long L$set$0 ; Length of Common Information Entry
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| 198 | LSCIE1:
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| 199 | .long 0x0 ; CIE Identifier Tag
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| 200 | .byte 0x1 ; CIE Version
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| 201 | .ascii "zR\0" ; CIE Augmentation
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| 202 | .byte 0x1 ; uleb128 0x1; CIE Code Alignment Factor
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| 203 | .byte 0x7c ; sleb128 -4; CIE Data Alignment Factor
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| 204 | .byte 0x41 ; CIE RA Column
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| 205 | .byte 0x1 ; uleb128 0x1; Augmentation size
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| 206 | .byte 0x10 ; FDE Encoding (pcrel)
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| 207 | .byte 0xc ; DW_CFA_def_cfa
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| 208 | .byte 0x1 ; uleb128 0x1
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| 209 | .byte 0x0 ; uleb128 0x0
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| 210 | .align 2
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| 211 | LECIE1:
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| 212 | LSFDE1:
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| 213 | .set L$set$1,LEFDE1-LASFDE1
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| 214 | .long L$set$1 ; FDE Length
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| 215 |
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| 216 | LASFDE1:
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| 217 | .set L$set$2,LASFDE1-Lframe1
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| 218 | .long L$set$2 ; FDE CIE offset
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| 219 | .long LFB1-. ; FDE initial location
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| 220 | .set L$set$3,LFE1-LFB1
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| 221 | .long L$set$3 ; FDE address range
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| 222 | .byte 0x0 ; uleb128 0x0; Augmentation size
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| 223 | .byte 0x4 ; DW_CFA_advance_loc4
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| 224 | .set L$set$3,LCFI1-LCFI0
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| 225 | .long L$set$3
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| 226 | .byte 0xe ; DW_CFA_def_cfa_offset
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| 227 | .byte 176,1 ; uleb128 176
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| 228 | .byte 0x4 ; DW_CFA_advance_loc4
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| 229 | .set L$set$4,LCFI0-LFB1
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| 230 | .long L$set$4
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| 231 | .byte 0x11 ; DW_CFA_offset_extended_sf
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| 232 | .byte 0x41 ; uleb128 0x41
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| 233 | .byte 0x7e ; sleb128 -2
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| 234 | .align 2
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| 235 | LEFDE1:
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| 236 |
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