| 1 | /* -----------------------------------------------------------------------
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| 2 | aix_closure.S - Copyright (c) 2002 2003 Free Software Foundation, Inc.
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| 3 | based on darwin_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 | .set r0,0
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| 28 | .set r1,1
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| 29 | .set r2,2
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| 30 | .set r3,3
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| 31 | .set r4,4
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| 32 | .set r5,5
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| 33 | .set r6,6
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| 34 | .set r7,7
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| 35 | .set r8,8
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| 36 | .set r9,9
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| 37 | .set r10,10
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| 38 | .set r11,11
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| 39 | .set r12,12
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| 40 | .set r13,13
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| 41 | .set r14,14
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| 42 | .set r15,15
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| 43 | .set r16,16
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| 44 | .set r17,17
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| 45 | .set r18,18
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| 46 | .set r19,19
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| 47 | .set r20,20
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| 48 | .set r21,21
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| 49 | .set r22,22
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| 50 | .set r23,23
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| 51 | .set r24,24
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| 52 | .set r25,25
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| 53 | .set r26,26
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| 54 | .set r27,27
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| 55 | .set r28,28
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| 56 | .set r29,29
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| 57 | .set r30,30
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| 58 | .set r31,31
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| 59 | .set f0,0
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| 60 | .set f1,1
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| 61 | .set f2,2
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| 62 | .set f3,3
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| 63 | .set f4,4
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| 64 | .set f5,5
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| 65 | .set f6,6
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| 66 | .set f7,7
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| 67 | .set f8,8
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| 68 | .set f9,9
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| 69 | .set f10,10
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| 70 | .set f11,11
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| 71 | .set f12,12
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| 72 | .set f13,13
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| 73 | .set f14,14
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| 74 | .set f15,15
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| 75 | .set f16,16
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| 76 | .set f17,17
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| 77 | .set f18,18
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| 78 | .set f19,19
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| 79 | .set f20,20
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| 80 | .set f21,21
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| 81 |
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| 82 | #define LIBFFI_ASM
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| 83 | #define JUMPTARGET(name) name
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| 84 | #define L(x) x
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| 85 | .file "aix_closure.S"
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| 86 | .toc
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| 87 | LC..60:
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| 88 | .tc L..60[TC],L..60
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| 89 | .csect .text[PR]
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| 90 | .align 2
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| 91 |
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| 92 | .csect .text[PR]
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| 93 | .align 2
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| 94 | .globl ffi_closure_ASM
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| 95 | .globl .ffi_closure_ASM
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| 96 | .csect ffi_closure_ASM[DS]
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| 97 |
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| 98 | ffi_closure_ASM:
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| 99 | .long .ffi_closure_ASM, TOC[tc0], 0
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| 100 | .csect .text[PR]
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| 101 | .ffi_closure_ASM:
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| 102 |
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| 103 | mflr r0 /* extract return address */
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| 104 | stw r0, 8(r1) /* save the return address */
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| 105 |
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| 106 | /* 24 Bytes (Linkage Area) */
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| 107 | /* 32 Bytes (params) */
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| 108 | /* 104 Bytes (13*8 from FPR) */
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| 109 | /* 8 Bytes (result)
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| 110 | /* 168 Bytes */
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| 111 |
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| 112 | stwu r1,-176(r1) /* skip over caller save area
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| 113 | keep stack aligned to 16 */
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| 114 |
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| 115 | /* we want to build up an area for the parameters passed */
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| 116 | /* in registers (both floating point and integer) */
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| 117 |
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| 118 | /* we store gpr 3 to gpr 10 (aligned to 4)
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| 119 | in the parents outgoing area */
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| 120 | stw r3, 200(r1)
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| 121 | stw r4, 204(r1)
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| 122 | stw r5, 208(r1)
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| 123 | stw r6, 212(r1)
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| 124 | stw r7, 216(r1)
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| 125 | stw r8, 220(r1)
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| 126 | stw r9, 224(r1)
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| 127 | stw r10, 228(r1)
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| 128 |
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| 129 | /* next save fpr 1 to fpr 13 (aligned to 8) */
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| 130 | stfd f1, 56(r1)
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| 131 | stfd f2, 64(r1)
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| 132 | stfd f3, 72(r1)
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| 133 | stfd f4, 80(r1)
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| 134 | stfd f5, 88(r1)
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| 135 | stfd f6, 96(r1)
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| 136 | stfd f7, 104(r1)
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| 137 | stfd f8, 112(r1)
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| 138 | stfd f9, 120(r1)
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| 139 | stfd f10, 128(r1)
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| 140 | stfd f11, 136(r1)
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| 141 | stfd f12, 144(r1)
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| 142 | stfd f13, 152(r1)
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| 143 |
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| 144 | /* set up registers for the routine that actually does the work */
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| 145 | /* get the context pointer from the trampoline */
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| 146 | mr r3,r11
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| 147 |
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| 148 | /* now load up the pointer to the result storage */
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| 149 | addi r4,r1,160
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| 150 |
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| 151 | /* now load up the pointer to the saved gpr registers */
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| 152 | addi r5,r1,200
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| 153 |
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| 154 | /* now load up the pointer to the saved fpr registers */
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| 155 | addi r6,r1,56
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| 156 |
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| 157 | /* now load up the pointer to the outgoing parameter */
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| 158 | /* stack in the previous frame */
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| 159 | addi r7,r1,232
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| 160 |
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| 161 | /* make the call */
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| 162 | bl .ffi_closure_helper_DARWIN
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| 163 | nop
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| 164 |
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| 165 | /* now r3 contains the return type */
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| 166 | /* so use it to look up in a table */
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| 167 | /* so we know how to deal with each type */
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| 168 |
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| 169 | /* look up the proper starting point in table */
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| 170 | /* by using return type as offset */
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| 171 | addi r5,r1,160 /* get pointer to results area */
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| 172 | lwz r4,LC..60(2) /* get address of jump table */
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| 173 | slwi r3,r3,2 /* now multiply return type by 4 */
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| 174 | lwzx r3,r4,r3 /* get the contents of that table value */
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| 175 | add r3,r3,r4 /* add contents of table to table address */
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| 176 | mtctr r3
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| 177 | bctr /* jump to it */
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| 178 |
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| 179 | L..60:
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| 180 | .long L..44-L..60 /* FFI_TYPE_VOID */
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| 181 | .long L..50-L..60 /* FFI_TYPE_INT */
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| 182 | .long L..47-L..60 /* FFI_TYPE_FLOAT */
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| 183 | .long L..46-L..60 /* FFI_TYPE_DOUBLE */
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| 184 | .long L..46-L..60 /* FFI_TYPE_LONGDOUBLE */
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| 185 | .long L..56-L..60 /* FFI_TYPE_UINT8 */
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| 186 | .long L..55-L..60 /* FFI_TYPE_SINT8 */
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| 187 | .long L..58-L..60 /* FFI_TYPE_UINT16 */
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| 188 | .long L..57-L..60 /* FFI_TYPE_SINT16 */
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| 189 | .long L..50-L..60 /* FFI_TYPE_UINT32 */
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| 190 | .long L..50-L..60 /* FFI_TYPE_SINT32 */
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| 191 | .long L..48-L..60 /* FFI_TYPE_UINT64 */
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| 192 | .long L..48-L..60 /* FFI_TYPE_SINT64 */
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| 193 | .long L..44-L..60 /* FFI_TYPE_STRUCT */
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| 194 | .long L..50-L..60 /* FFI_TYPE_POINTER */
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| 195 |
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| 196 |
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| 197 | /* case double */
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| 198 | L..46:
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| 199 | lfd f1,0(r5)
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| 200 | b L..44
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| 201 |
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| 202 | /* case float */
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| 203 | L..47:
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| 204 | lfs f1,0(r5)
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| 205 | b L..44
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| 206 |
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| 207 | /* case long long */
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| 208 | L..48:
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| 209 | lwz r3,0(r5)
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| 210 | lwz r4,4(r5)
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| 211 | b L..44
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| 212 |
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| 213 | /* case default / int32 / pointer */
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| 214 | L..50:
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| 215 | lwz r3,0(r5)
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| 216 | b L..44
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| 217 |
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| 218 | /* case signed int8 */
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| 219 | L..55:
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| 220 | addi r5,r5,3
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| 221 | lbz r3,0(r5)
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| 222 | slwi r3,r3,24
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| 223 | srawi r3,r3,24
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| 224 | b L..44
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| 225 |
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| 226 | /* case unsigned int8 */
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| 227 | L..56:
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| 228 | addi r5,r5,3
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| 229 | lbz r3,0(r5)
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| 230 | b L..44
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| 231 |
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| 232 | /* case signed int16 */
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| 233 | L..57:
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| 234 | addi r5,r5,2
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| 235 | lhz r3,0(r5)
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| 236 | extsh r3,r3
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| 237 | b L..44
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| 238 |
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| 239 | /* case unsigned int16 */
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| 240 | L..58:
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| 241 | addi r5,r5,2
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| 242 | lhz r3,0(r5)
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| 243 |
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| 244 | /* case void / done */
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| 245 | L..44:
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| 246 |
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| 247 | addi r1,r1,176 /* restore stack pointer */
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| 248 | lwz r0,8(r1) /* get return address */
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| 249 | mtlr r0 /* reset link register */
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| 250 | blr
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| 251 |
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| 252 | /* END(ffi_closure_ASM) */
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