Machine code: Difference between revisions
julia example
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Line 332:
7 + 12 = 19
</pre>
=={{header}}==
{{trans|C}}
Julia cannot execute machine code directly, but can embed C and C++ with the Cxx library.
<lang julia>using Cxx
cxx"""
#include <stdio.h>
#include <sys/mman.h>
#include <string.h>
int test (int a, int b)
{
/*
mov EAX, [ESP+4]
add EAX, [ESP+8]
ret
*/
char code[] = {0x8B, 0x44, 0x24, 0x4, 0x3, 0x44, 0x24, 0x8, 0xC3};
void *buf;
int c;
/* copy code to executable buffer */
buf = mmap (0,sizeof(code),PROT_READ|PROT_WRITE|PROT_EXEC,
MAP_PRIVATE|MAP_ANON,-1,0);
memcpy (buf, code, sizeof(code));
/* run code */
c = ((int (*) (int, int))buf)(a, b);
/* free buffer */
munmap (buf, sizeof(code));
return c;
}
int main ()
{
printf("%d\n", test(7,12));
return 0;
}
"""
julia_function = @cxx main()
julia_function()
</lang>
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