1/* ----------------------------------------------------------------------- 2 sysv.h - Copyright (c) 1998 Geoffrey Keating 3 4 PowerPC Assembly glue. 5 6 $Id: sysv.S,v 1.1.1.1 1998/11/29 16:48:16 green Exp $ 7 8 Permission is hereby granted, free of charge, to any person obtaining 9 a copy of this software and associated documentation files (the 10 ``Software''), to deal in the Software without restriction, including 11 without limitation the rights to use, copy, modify, merge, publish, 12 distribute, sublicense, and/or sell copies of the Software, and to 13 permit persons to whom the Software is furnished to do so, subject to 14 the following conditions: 15 16 The above copyright notice and this permission notice shall be included 17 in all copies or substantial portions of the Software. 18 19 THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS 20 OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF 21 MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 22 IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR 23 OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 24 ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR 25 OTHER DEALINGS IN THE SOFTWARE. 26 ----------------------------------------------------------------------- */ 27 28#define LIBFFI_ASM 29#include <fficonfig.h> 30#include <ffi.h> 31#include <powerpc/asm.h> 32 33#ifndef __powerpc64__ 34 .globl ffi_prep_args_SYSV 35ENTRY(ffi_call_SYSV) 36.LFB1: 37 /* Save the old stack pointer as AP. */ 38 mr %r8,%r1 39 40.LCFI0: 41 /* Allocate the stack space we need. */ 42 stwux %r1,%r1,%r4 43 /* Save registers we use. */ 44 mflr %r9 45 stw %r28,-16(%r8) 46.LCFI1: 47 stw %r29,-12(%r8) 48.LCFI2: 49 stw %r30, -8(%r8) 50.LCFI3: 51 stw %r31, -4(%r8) 52.LCFI4: 53 stw %r9, 4(%r8) 54.LCFI5: 55 56 /* Save arguments over call... */ 57 mr %r31,%r5 /* flags, */ 58 mr %r30,%r6 /* rvalue, */ 59 mr %r29,%r7 /* function address, */ 60 mr %r28,%r8 /* our AP. */ 61.LCFI6: 62 63 /* Call ffi_prep_args_SYSV. */ 64 mr %r4,%r1 65 bl JUMPTARGET(ffi_prep_args_SYSV) 66 67 /* Now do the call. */ 68 /* Set up cr1 with bits 4-7 of the flags. */ 69 mtcrf 0x40,%r31 70 /* Get the address to call into CTR. */ 71 mtctr %r29 72 /* Load all those argument registers. */ 73 lwz %r3,-16-(8*4)(%r28) 74 lwz %r4,-16-(7*4)(%r28) 75 lwz %r5,-16-(6*4)(%r28) 76 lwz %r6,-16-(5*4)(%r28) 77 bf- 5,1f 78 nop 79 lwz %r7,-16-(4*4)(%r28) 80 lwz %r8,-16-(3*4)(%r28) 81 lwz %r9,-16-(2*4)(%r28) 82 lwz %r10,-16-(1*4)(%r28) 83 nop 841: 85 86 /* Load all the FP registers. */ 87 bf- 6,2f 88 lfd %f1,-16-(8*4)-(8*8)(%r28) 89 lfd %f2,-16-(8*4)-(7*8)(%r28) 90 lfd %f3,-16-(8*4)-(6*8)(%r28) 91 lfd %f4,-16-(8*4)-(5*8)(%r28) 92 nop 93 lfd %f5,-16-(8*4)-(4*8)(%r28) 94 lfd %f6,-16-(8*4)-(3*8)(%r28) 95 lfd %f7,-16-(8*4)-(2*8)(%r28) 96 lfd %f8,-16-(8*4)-(1*8)(%r28) 972: 98 99 /* Make the call. */ 100 bctrl 101 102 /* Now, deal with the return value. */ 103 mtcrf 0x01,%r31 104 bt- 30,L(done_return_value) 105 bt- 29,L(fp_return_value) 106 stw %r3,0(%r30) 107 bf+ 28,L(done_return_value) 108 stw %r4,4(%r30) 109 /* Fall through... */ 110 111L(done_return_value): 112 /* Restore the registers we used and return. */ 113 lwz %r9, 4(%r28) 114 lwz %r31, -4(%r28) 115 mtlr %r9 116 lwz %r30, -8(%r28) 117 lwz %r29,-12(%r28) 118 lwz %r28,-16(%r28) 119 lwz %r1,0(%r1) 120 blr 121 122L(fp_return_value): 123 bf 28,L(float_return_value) 124 stfd %f1,0(%r30) 125 b L(done_return_value) 126L(float_return_value): 127 stfs %f1,0(%r30) 128 b L(done_return_value) 129.LFE1: 130END(ffi_call_SYSV) 131 132 .section ".eh_frame",EH_FRAME_FLAGS,@progbits 133.Lframe1: 134 .4byte .LECIE1-.LSCIE1 /* Length of Common Information Entry */ 135.LSCIE1: 136 .4byte 0x0 /* CIE Identifier Tag */ 137 .byte 0x1 /* CIE Version */ 138#if defined _RELOCATABLE || defined __PIC__ 139 .ascii "zR\0" /* CIE Augmentation */ 140#else 141 .ascii "\0" /* CIE Augmentation */ 142#endif 143 .uleb128 0x1 /* CIE Code Alignment Factor */ 144 .sleb128 -4 /* CIE Data Alignment Factor */ 145 .byte 0x41 /* CIE RA Column */ 146#if defined _RELOCATABLE || defined __PIC__ 147 .uleb128 0x1 /* Augmentation size */ 148 .byte 0x1b /* FDE Encoding (pcrel sdata4) */ 149#endif 150 .byte 0xc /* DW_CFA_def_cfa */ 151 .uleb128 0x1 152 .uleb128 0x0 153 .align 2 154.LECIE1: 155.LSFDE1: 156 .4byte .LEFDE1-.LASFDE1 /* FDE Length */ 157.LASFDE1: 158 .4byte .LASFDE1-.Lframe1 /* FDE CIE offset */ 159#if defined _RELOCATABLE || defined __PIC__ 160 .4byte .LFB1-. /* FDE initial location */ 161#else 162 .4byte .LFB1 /* FDE initial location */ 163#endif 164 .4byte .LFE1-.LFB1 /* FDE address range */ 165#if defined _RELOCATABLE || defined __PIC__ 166 .uleb128 0x0 /* Augmentation size */ 167#endif 168 .byte 0x4 /* DW_CFA_advance_loc4 */ 169 .4byte .LCFI0-.LFB1 170 .byte 0xd /* DW_CFA_def_cfa_register */ 171 .uleb128 0x08 172 .byte 0x4 /* DW_CFA_advance_loc4 */ 173 .4byte .LCFI5-.LCFI0 174 .byte 0x2f /* DW_CFA_GNU_negative_offset_extended */ 175 .uleb128 0x41 176 .uleb128 0x1 177 .byte 0x9f /* DW_CFA_offset, column 0x1f */ 178 .uleb128 0x1 179 .byte 0x9e /* DW_CFA_offset, column 0x1e */ 180 .uleb128 0x2 181 .byte 0x9d /* DW_CFA_offset, column 0x1d */ 182 .uleb128 0x3 183 .byte 0x9c /* DW_CFA_offset, column 0x1c */ 184 .uleb128 0x4 185 .byte 0x4 /* DW_CFA_advance_loc4 */ 186 .4byte .LCFI6-.LCFI5 187 .byte 0xd /* DW_CFA_def_cfa_register */ 188 .uleb128 0x1c 189 .align 2 190.LEFDE1: 191#endif 192