static_buf.cpp

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/*
    sample to use static memory
*/
#include <stdio.h>
#define XBYAK_NO_OP_NAMES
#include "xbyak/xbyak.h"
 
MIE_ALIGN(4096) char buf[4096];
 
struct Code : Xbyak::CodeGenerator {
    Code()
        : Xbyak::CodeGenerator(sizeof(buf), buf)
    {
        puts("generate");
        printf("ptr=%p, %p\n", getCode(), buf);
        Xbyak::CodeArray::protect(buf, sizeof(buf), true);
#ifdef XBYAK32
        mov(eax, ptr [esp + 4]);
        add(eax, ptr [esp + 8]);
#elif defined(XBYAK64_WIN)
        lea(rax, ptr [rcx + rdx]);
#else
        lea(rax, ptr [rdi + rsi]);
#endif
        ret();
    }
} s_code;
 
inline int add(int a, int b)
{
    return Xbyak::CastTo<int (*)(int,int)>(buf)(a, b);
}
 
int main()
{
    int sum = 0;
    for (int i = 0; i < 10; i++) {
        sum += add(i, 5);
    }
    printf("sum=%d\n", sum);
}