| 1 | /* -----------------------------------------------------------------------
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| 2 | osf.S - Copyright (c) 1998, 2001 Red Hat
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| 3 |
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| 4 | Alpha/OSF Foreign Function Interface
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| 5 |
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| 6 | $Id: osf.S,v 1.1.1.1 1998/11/29 16:48:16 green Exp $
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| 7 |
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| 8 | Permission is hereby granted, free of charge, to any person obtaining
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| 9 | a copy of this software and associated documentation files (the
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| 10 | ``Software''), to deal in the Software without restriction, including
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| 11 | without limitation the rights to use, copy, modify, merge, publish,
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| 12 | distribute, sublicense, and/or sell copies of the Software, and to
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| 13 | permit persons to whom the Software is furnished to do so, subject to
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| 14 | the following conditions:
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| 15 |
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| 16 | The above copyright notice and this permission notice shall be included
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| 17 | in all copies or substantial portions of the Software.
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| 18 |
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| 19 | THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
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| 20 | OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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| 21 | MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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| 22 | IN NO EVENT SHALL CYGNUS SOLUTIONS BE LIABLE FOR ANY CLAIM, DAMAGES OR
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| 23 | OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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| 24 | ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 25 | OTHER DEALINGS IN THE SOFTWARE.
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| 26 | ----------------------------------------------------------------------- */
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| 27 |
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| 28 | #define LIBFFI_ASM
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| 29 | #include <ffi.h>
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| 30 |
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| 31 | .arch ev6
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| 32 | .text
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| 33 |
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| 34 | /* ffi_call_osf (void *args, unsigned long bytes, unsigned flags,
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| 35 | void *raddr, void (*fnaddr)());
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| 36 |
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| 37 | Bit o trickiness here -- ARGS+BYTES is the base of the stack frame
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| 38 | for this function. This has been allocated by ffi_call. We also
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| 39 | deallocate some of the stack that has been alloca'd. */
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| 40 |
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| 41 | .align 3
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| 42 | .globl ffi_call_osf
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| 43 | .ent ffi_call_osf
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| 44 | ffi_call_osf:
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| 45 | .frame $15, 32, $26, 0
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| 46 | .mask 0x4008000, -32
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| 47 | $LFB1:
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| 48 | addq $16,$17,$1
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| 49 | mov $16, $30
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| 50 | stq $26, 0($1)
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| 51 | $LCFI0:
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| 52 | stq $15, 8($1)
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| 53 | $LCFI1:
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| 54 | stq $18, 16($1)
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| 55 | mov $1, $15
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| 56 | $LCFI2:
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| 57 | .prologue 0
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| 58 |
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| 59 | stq $19, 24($1)
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| 60 | mov $20, $27
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| 61 |
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| 62 | # Load up all of the (potential) argument registers.
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| 63 | ldq $16, 0($30)
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| 64 | ldt $f16, 0($30)
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| 65 | ldt $f17, 8($30)
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| 66 | ldq $17, 8($30)
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| 67 | ldt $f18, 16($30)
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| 68 | ldq $18, 16($30)
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| 69 | ldt $f19, 24($30)
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| 70 | ldq $19, 24($30)
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| 71 | ldt $f20, 32($30)
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| 72 | ldq $20, 32($30)
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| 73 | ldt $f21, 40($30)
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| 74 | ldq $21, 40($30)
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| 75 |
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| 76 | # Deallocate the register argument area.
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| 77 | lda $30, 48($30)
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| 78 |
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| 79 | jsr $26, ($27), 0
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| 80 | ldgp $29, 0($26)
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| 81 |
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| 82 | # If the return value pointer is NULL, assume no return value.
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| 83 | ldq $19, 24($15)
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| 84 | ldq $18, 16($15)
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| 85 | ldq $26, 0($15)
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| 86 | beq $19, $noretval
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| 87 |
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| 88 | # Store the return value out in the proper type.
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| 89 | cmpeq $18, FFI_TYPE_INT, $1
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| 90 | bne $1, $retint
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| 91 | cmpeq $18, FFI_TYPE_FLOAT, $2
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| 92 | bne $2, $retfloat
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| 93 | cmpeq $18, FFI_TYPE_DOUBLE, $3
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| 94 | bne $3, $retdouble
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| 95 |
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| 96 | $noretval:
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| 97 | ldq $15, 8($15)
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| 98 | ret
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| 99 |
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| 100 | $retint:
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| 101 | stq $0, 0($19)
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| 102 | nop
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| 103 | ldq $15, 8($15)
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| 104 | ret
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| 105 |
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| 106 | $retfloat:
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| 107 | sts $f0, 0($19)
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| 108 | nop
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| 109 | ldq $15, 8($15)
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| 110 | ret
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| 111 |
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| 112 | $retdouble:
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| 113 | stt $f0, 0($19)
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| 114 | nop
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| 115 | ldq $15, 8($15)
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| 116 | ret
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| 117 | $LFE1:
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| 118 |
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| 119 | .end ffi_call_osf
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| 120 |
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| 121 | /* ffi_closure_osf(...)
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| 122 |
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| 123 | Receives the closure argument in $1. */
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| 124 |
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| 125 | .align 3
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| 126 | .globl ffi_closure_osf
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| 127 | .ent ffi_closure_osf
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| 128 | ffi_closure_osf:
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| 129 | .frame $30, 16*8, $26, 0
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| 130 | .mask 0x4000000, -16*8
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| 131 | $LFB2:
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| 132 | ldgp $29, 0($27)
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| 133 | subq $30, 16*8, $30
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| 134 | $LCFI5:
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| 135 | stq $26, 0($30)
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| 136 | $LCFI6:
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| 137 | .prologue 1
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| 138 |
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| 139 | # Store all of the potential argument registers in va_list format.
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| 140 | stt $f16, 4*8($30)
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| 141 | stt $f17, 5*8($30)
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| 142 | stt $f18, 6*8($30)
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| 143 | stt $f19, 7*8($30)
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| 144 | stt $f20, 8*8($30)
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| 145 | stt $f21, 9*8($30)
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| 146 | stq $16, 10*8($30)
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| 147 | stq $17, 11*8($30)
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| 148 | stq $18, 12*8($30)
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| 149 | stq $19, 13*8($30)
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| 150 | stq $20, 14*8($30)
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| 151 | stq $21, 15*8($30)
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| 152 |
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| 153 | # Call ffi_closure_osf_inner to do the bulk of the work.
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| 154 | mov $1, $16
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| 155 | lda $17, 2*8($30)
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| 156 | lda $18, 10*8($30)
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| 157 | jsr $26, ffi_closure_osf_inner
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| 158 | ldgp $29, 0($26)
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| 159 | ldq $26, 0($30)
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| 160 |
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| 161 | # Load up the return value in the proper type.
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| 162 | lda $1, $load_table
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| 163 | s4addq $0, $1, $1
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| 164 | ldl $1, 0($1)
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| 165 | addq $1, $29, $1
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| 166 | jmp $31, ($1), $load_32
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| 167 |
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| 168 | .align 4
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| 169 | $load_none:
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| 170 | addq $30, 16*8, $30
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| 171 | ret
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| 172 |
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| 173 | .align 4
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| 174 | $load_float:
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| 175 | lds $f0, 16($30)
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| 176 | nop
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| 177 | addq $30, 16*8, $30
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| 178 | ret
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| 179 |
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| 180 | .align 4
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| 181 | $load_double:
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| 182 | ldt $f0, 16($30)
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| 183 | nop
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| 184 | addq $30, 16*8, $30
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| 185 | ret
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| 186 |
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| 187 | .align 4
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| 188 | $load_u8:
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| 189 | #ifdef __alpha_bwx__
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| 190 | ldbu $0, 16($30)
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| 191 | nop
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| 192 | #else
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| 193 | ldq $0, 16($30)
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| 194 | and $0, 255, $0
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| 195 | #endif
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| 196 | addq $30, 16*8, $30
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| 197 | ret
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| 198 |
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| 199 | .align 4
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| 200 | $load_s8:
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| 201 | #ifdef __alpha_bwx__
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| 202 | ldbu $0, 16($30)
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| 203 | sextb $0, $0
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| 204 | #else
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| 205 | ldq $0, 16($30)
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| 206 | sll $0, 56, $0
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| 207 | sra $0, 56, $0
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| 208 | #endif
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| 209 | addq $30, 16*8, $30
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| 210 | ret
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| 211 |
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| 212 | .align 4
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| 213 | $load_u16:
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| 214 | #ifdef __alpha_bwx__
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| 215 | ldwu $0, 16($30)
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| 216 | nop
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| 217 | #else
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| 218 | ldq $0, 16($30)
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| 219 | zapnot $0, 3, $0
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| 220 | #endif
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| 221 | addq $30, 16*8, $30
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| 222 | ret
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| 223 |
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| 224 | .align 4
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| 225 | $load_s16:
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| 226 | #ifdef __alpha_bwx__
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| 227 | ldwu $0, 16($30)
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| 228 | sextw $0, $0
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| 229 | #else
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| 230 | ldq $0, 16($30)
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| 231 | sll $0, 48, $0
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| 232 | sra $0, 48, $0
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| 233 | #endif
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| 234 | addq $30, 16*8, $30
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| 235 | ret
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| 236 |
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| 237 | .align 4
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| 238 | $load_32:
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| 239 | ldl $0, 16($30)
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| 240 | nop
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| 241 | addq $30, 16*8, $30
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| 242 | ret
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| 243 |
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| 244 | .align 4
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| 245 | $load_64:
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| 246 | ldq $0, 16($30)
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| 247 | nop
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| 248 | addq $30, 16*8, $30
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| 249 | ret
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| 250 | $LFE2:
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| 251 |
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| 252 | .end ffi_closure_osf
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| 253 |
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| 254 | #ifdef __ELF__
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| 255 | .section .rodata
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| 256 | #else
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| 257 | .rdata
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| 258 | #endif
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| 259 | $load_table:
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| 260 | .gprel32 $load_none # FFI_TYPE_VOID
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| 261 | .gprel32 $load_32 # FFI_TYPE_INT
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| 262 | .gprel32 $load_float # FFI_TYPE_FLOAT
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| 263 | .gprel32 $load_double # FFI_TYPE_DOUBLE
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| 264 | .gprel32 $load_double # FFI_TYPE_LONGDOUBLE
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| 265 | .gprel32 $load_u8 # FFI_TYPE_UINT8
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| 266 | .gprel32 $load_s8 # FFI_TYPE_SINT8
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| 267 | .gprel32 $load_u16 # FFI_TYPE_UINT16
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| 268 | .gprel32 $load_s16 # FFI_TYPE_SINT16
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| 269 | .gprel32 $load_32 # FFI_TYPE_UINT32
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| 270 | .gprel32 $load_32 # FFI_TYPE_SINT32
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| 271 | .gprel32 $load_64 # FFI_TYPE_UINT64
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| 272 | .gprel32 $load_64 # FFI_TYPE_SINT64
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| 273 | .gprel32 $load_none # FFI_TYPE_STRUCT
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| 274 | .gprel32 $load_64 # FFI_TYPE_POINTER
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| 275 |
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| 276 | /* Assert that the table above is in sync with ffi.h. */
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| 277 |
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| 278 | #if FFI_TYPE_FLOAT != 2 \
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| 279 | || FFI_TYPE_DOUBLE != 3 \
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| 280 | || FFI_TYPE_UINT8 != 5 \
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| 281 | || FFI_TYPE_SINT8 != 6 \
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| 282 | || FFI_TYPE_UINT16 != 7 \
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| 283 | || FFI_TYPE_SINT16 != 8 \
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| 284 | || FFI_TYPE_UINT32 != 9 \
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| 285 | || FFI_TYPE_SINT32 != 10 \
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| 286 | || FFI_TYPE_UINT64 != 11 \
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| 287 | || FFI_TYPE_SINT64 != 12 \
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| 288 | || FFI_TYPE_STRUCT != 13 \
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| 289 | || FFI_TYPE_POINTER != 14 \
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| 290 | || FFI_TYPE_LAST != 14
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| 291 | #error "osf.S out of sync with ffi.h"
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| 292 | #endif
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| 293 |
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| 294 | #ifdef __ELF__
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| 295 | .section .eh_frame,"aw",@progbits
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| 296 | __FRAME_BEGIN__:
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| 297 | .4byte $LECIE1-$LSCIE1 # Length of Common Information Entry
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| 298 | $LSCIE1:
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| 299 | .4byte 0x0 # CIE Identifier Tag
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| 300 | .byte 0x1 # CIE Version
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| 301 | .ascii "zR\0" # CIE Augmentation
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| 302 | .byte 0x1 # uleb128 0x1; CIE Code Alignment Factor
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| 303 | .byte 0x78 # sleb128 -8; CIE Data Alignment Factor
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| 304 | .byte 0x1a # CIE RA Column
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| 305 | .byte 0x1 # uleb128 0x1; Augmentation size
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| 306 | .byte 0x1b # FDE Encoding (pcrel sdata4)
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| 307 | .byte 0xc # DW_CFA_def_cfa
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| 308 | .byte 0x1e # uleb128 0x1e
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| 309 | .byte 0x0 # uleb128 0x0
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| 310 | .align 3
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| 311 | $LECIE1:
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| 312 | $LSFDE1:
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| 313 | .4byte $LEFDE1-$LASFDE1 # FDE Length
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| 314 | $LASFDE1:
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| 315 | .4byte $LASFDE1-__FRAME_BEGIN__ # FDE CIE offset
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| 316 | .4byte $LFB1-. # FDE initial location
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| 317 | .4byte $LFE1-$LFB1 # FDE address range
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| 318 | .byte 0x0 # uleb128 0x0; Augmentation size
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| 319 | .byte 0x4 # DW_CFA_advance_loc4
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| 320 | .4byte $LCFI0-$LFB1
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| 321 | .byte 0xe # DW_CFA_def_cfa_offset
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| 322 | .byte 0x30 # uleb128 0x30
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| 323 | .byte 0x4 # DW_CFA_advance_loc4
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| 324 | .4byte $LCFI1-$LCFI0
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| 325 | .byte 0x9a # DW_CFA_offset, column 0x1a
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| 326 | .byte 0x6 # uleb128 0x6
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| 327 | .byte 0x8f # DW_CFA_offset, column 0xf
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| 328 | .byte 0x5 # uleb128 0x5
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| 329 | .byte 0x4 # DW_CFA_advance_loc4
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| 330 | .4byte $LCFI2-$LCFI1
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| 331 | .byte 0xc # DW_CFA_def_cfa
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| 332 | .byte 0xf # uleb128 0xf
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| 333 | .byte 0x30 # uleb128 0x30
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| 334 | .align 3
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| 335 | $LEFDE1:
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| 336 |
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| 337 | $LSFDE3:
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| 338 | .4byte $LEFDE3-$LASFDE3 # FDE Length
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| 339 | $LASFDE3:
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| 340 | .4byte $LASFDE3-__FRAME_BEGIN__ # FDE CIE offset
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| 341 | .4byte $LFB2-. # FDE initial location
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| 342 | .4byte $LFE2-$LFB2 # FDE address range
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| 343 | .byte 0x0 # uleb128 0x0; Augmentation size
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| 344 | .byte 0x4 # DW_CFA_advance_loc4
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| 345 | .4byte $LCFI5-$LFB2
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| 346 | .byte 0xe # DW_CFA_def_cfa_offset
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| 347 | .byte 0x90,0x1 # uleb128 0x90
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| 348 | .byte 0x4 # DW_CFA_advance_loc4
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| 349 | .4byte $LCFI6-$LCFI5
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| 350 | .byte 0x9a # DW_CFA_offset, column 0x1a
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| 351 | .byte 0x12 # uleb128 0x12
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| 352 | .align 3
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| 353 | $LEFDE3:
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| 354 | #endif
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