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1 /*
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2
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3 Package: dyncall
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4 Library: dyncall
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5 File: dyncall/dyncall_call_mips_o32_gas.s
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6 Description: mips "o32" abi call kernel implementation in GNU Assembler
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7 License:
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8
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9 Copyright (c) 2007-2011 Daniel Adler <dadler@uni-goettingen.de>,
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10 Tassilo Philipp <tphilipp@potion-studios.com>
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11
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12 Permission to use, copy, modify, and distribute this software for any
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13 purpose with or without fee is hereby granted, provided that the above
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14 copyright notice and this permission notice appear in all copies.
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15
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16 THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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17 WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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18 MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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19 ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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20 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
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21 ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
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22 OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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23
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24 */
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25 /* $4 target function */
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26 /* $5 register data */
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27 /* $6 stack size (min 16-byte aligned to 8-bytes already) */
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28 /* $7 stack data */
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29
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30
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31
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32 .section .mdebug.abi32
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33 .previous
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34 .abicalls
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35 .text
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36 .align 2
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37 .globl dcCall_mips_o32
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38 .ent dcCall_mips_o32
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39 .type dcCall_mips_o32, @function
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40 dcCall_mips_o32:
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41 .frame $fp,40,$31 /* vars=8, regs=2/0, args=16, gp=8 */
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42 .mask 0xc0000000,-4
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43 .fmask 0x00000000,0
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44 .set noreorder
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45 .set nomacro
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46
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47 addiu $sp,$sp,-8
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48 sw $31,4($sp) /* save link register */
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49 sw $fp,0($sp) /* save frame pointer */
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50 nop
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51 move $fp,$sp /* frame pointer = sp */
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52 sub $sp, $sp, $6 /* increment stack */
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53
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54 /* copy stack data */
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55
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56 /* $12 source pointer (parameter stack data) */
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57 /* $14 destination (stack pointer) */
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58 /* $6 byte count */
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59
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60 move $12, $7
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61 move $14, $sp
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62
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63 .next:
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64 beq $6, $0, .skip
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65 nop
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66 lw $2, 0($12)
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67 nop
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68 sw $2, 0($14)
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69 addiu $12,$12, 4
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70 addiu $14,$14, 4
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71 addiu $6, $6, -4
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72 j .next
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73 nop
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74 .skip:
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75
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76 /* load two double-precision floating-point argument registers ($f12, $f14) */
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77
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78 l.d $f12, 0($5)
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79 l.d $f14, 8($5)
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80 /* prepare call */
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81
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82
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83 move $12, $7 /* $12 stack data */
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84 move $25, $4 /* $25 target function */
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85
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86 /* load first four integer arguments ($4-$7) */
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87
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88 lw $4, 0($12)
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89 lw $5, 4($12)
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90 lw $6, 8($12)
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91 lw $7,12($12)
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92
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93 /* call target function */
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94
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95 jalr $25
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96 nop
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97 move $sp,$fp /* restore stack pointer */
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98 nop
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99 lw $31,4($sp) /* restore return address */
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100 lw $fp,0($sp) /* restore frame pointer */
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101 addiu $sp,$sp,8 /* end stack frame */
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102 j $31 /* return */
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103 nop
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104
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105 .set macro
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106 .set reorder
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107 .end dcCall_mips_o32
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108 .ident "handwritten"
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109
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