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1 /*
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2
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3 Package: dyncall
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4 Library: test
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5 File: test/gen-masm/call_x64.S
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6 Description:
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7 License:
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8
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281
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9 Copyright (c) 2011-2018 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
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26
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27
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28 #if defined(GEN_MASM)
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29 .CODE
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30 # define BEGIN_ASM
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31 # define END_ASM END
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32 # define GLOBAL(X) X PROC
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33 # define BEGIN_PROC(X) OPTION PROLOGUE:NONE, EPILOGUE:NONE
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34 # define END_PROC(X) X ENDP
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35 #else
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36 .intel_syntax
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37 .text
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38 # define BEGIN_ASM
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39 # define END_ASM
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40 # define GLOBAL(X) .globl X
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41 # define BEGIN_PROC(X) X:
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42 # define END_PROC(X)
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43 #endif
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44
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45 BEGIN_ASM
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46
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47 // ---------------------------------------------------------------------------
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48 // Call Kernel for x64 System V
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49
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50 GLOBAL(dcCall_x64_sysv)
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51 BEGIN_PROC(dcCall_x64_sysv)
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52 // rdi : size of arguments to be passed via stack
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53 // rsi : pointer to arguments to be passed via the stack
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54 // rdx : pointer to arguments of integral/pointer type to be passed via registers
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55 // rcx : pointer to arguments of floating point type to be passed via registers
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56 // r8 : target function pointer
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57
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58 push rbp // Pseudo-prolog - preserve rbp.
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59 push rbx // Preserve rbx and store pointer to function in it.
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60
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61 mov rbp, rsp // Store stack pointer in rbp.
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62
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63 mov rbx, r8
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64
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65 movsd xmm0, qword ptr[rcx ] // Copy first 8 floats to xmm0-xmm7 (this makes rcx free to use).
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66 movsd xmm1, qword ptr[rcx+ 8]
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67 movsd xmm2, qword ptr[rcx+16]
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68 movsd xmm3, qword ptr[rcx+24]
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69 movsd xmm4, qword ptr[rcx+32]
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70 movsd xmm5, qword ptr[rcx+40]
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71 movsd xmm6, qword ptr[rcx+48]
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72 movsd xmm7, qword ptr[rcx+56]
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73
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74 sub rsp, rdi // Setup stack frame by subtracting the size of the arguments.
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75
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76 mov rax, rdi // Align stack.
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77 add rax, 8
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78 and rax, 15
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79 sub rsp, rax
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80
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81 mov rcx, rdi // Store number of bytes to copy to stack in rcx (for rep movsb).
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82 mov rdi, rsp // Store pointer to beginning of stack arguments in rdi (for rep movsb).
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83
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84 rep movsb // @@@ should be optimized (e.g. movq)
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85
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86 mov rdi, qword ptr[rdx ] // Copy first six int/pointer arguments to rdi, rsi, rdx, rcx, r8, r9.
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87 mov rsi, qword ptr[rdx+ 8]
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88 mov rcx, qword ptr[rdx+24]
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89 mov r8, qword ptr[rdx+32]
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90 mov r9, qword ptr[rdx+40]
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91 mov rdx, qword ptr[rdx+16] /* Set rdx last to not overwrite it to soon. */
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92
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93 mov al, 8 /* Put upper bound of number of used xmm registers in al. */
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94 call rbx /* Invoke function. */
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95
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96 mov rsp, rbp /* Restore stack pointer (such that we can pop the preserved values). */
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97
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98 pop rbx /* Restore rbx. */
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99 pop rbp /* Pseudo-epilog. */
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100
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101 ret
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102 END_PROC(dcCall_x64_sysv)
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103
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104 // ---------------------------------------------------------------------------
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105 // Call Kernel for x64 Win64
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106
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107 GLOBAL(dcCall_x64_win64)
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108 BEGIN_PROC(dcCall_x64_win64)
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109 push rbp // Pseudo-prolog - preserve rbp.
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110 push rsi // Preserve rsi and rdi.
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111 push rdi
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112
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113 mov rbp, rsp // Store stack pointer in rbp.
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114
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115 sub rsp, rcx // Setup stack frame by subtracting the size of the arguments.
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116
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117 mov rax, rcx // Align stack.
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118 add rax, 8
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119 and rax, 15
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120 sub rsp, rax
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121
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122 mov rsi, rdx // Let rsi point to the arguments.
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123 mov rdi, rsp // Store pointer to beginning of stack arguments in rdi (for rep movsb).
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124 mov rax, r9 // Put function address in rax.
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125
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126 rep movsb // @@@ should be optimized (e.g. movq)
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127
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128 mov rcx, qword ptr[r8 ] // Copy first four arguments to rcx, rdx, r8, r9 and xmm0-xmm3.
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129 mov rdx, qword ptr[r8+ 8]
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130 mov r9, qword ptr[r8+24] // Set r9 first to not overwrite r8 too soon.
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131 mov r8, qword ptr[r8+16]
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132 movd xmm0, rcx
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133 movd xmm1, rdx
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134 movd xmm2, r8
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135 movd xmm3, r9
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136
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137 push r9 // Push first four arguments onto the stack preserve area.
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138 push r8
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139 push rdx
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140 push rcx
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141
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142 call rax // Invoke function.
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143
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144 mov rsp, rbp // Restore stack pointer (such that we can pop the preserved values).
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145
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146 pop rdi // Restore rsi and rdi.
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147 pop rsi
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148 pop rbp // Pseudo-epilog.
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149
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150 ret
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151 END_PROC(dcCall_x64_win64)
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152
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153 END_ASM
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154
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