48 lines
1.0 KiB
Go
48 lines
1.0 KiB
Go
package main
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import "fmt"
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/*
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#include <stdio.h>
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#include <stdlib.h>
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#include <sys/mman.h>
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#include <string.h>
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typedef unsigned char byte;
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typedef byte (*mcfunc) (byte, byte);
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void runMachineCode(void *buf, byte a, byte b) {
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mcfunc fp = (mcfunc)buf;
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printf("%d\n", fp(a, b));
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}
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*/
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import "C"
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func main() {
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code := []byte{
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144, // Align
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144,
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106, 12, // Prepare stack
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184, 7, 0, 0, 0,
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72, 193, 224, 32,
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80,
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139, 68, 36, 4, 3, 68, 36, 8, // Rosetta task code
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76, 137, 227, // Get result
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137, 195,
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72, 193, 227, 4,
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128, 203, 2,
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72, 131, 196, 16, // Clean up stack
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195, // Return
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}
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le := len(code)
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buf := C.mmap(nil, C.size_t(le), C.PROT_READ|C.PROT_WRITE|C.PROT_EXEC,
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C.MAP_PRIVATE|C.MAP_ANON, -1, 0)
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codePtr := C.CBytes(code)
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C.memcpy(buf, codePtr, C.size_t(le))
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var a, b byte = 7, 12
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fmt.Printf("%d + %d = ", a, b)
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C.runMachineCode(buf, C.byte(a), C.byte(b))
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C.munmap(buf, C.size_t(le))
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C.free(codePtr)
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}
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