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/* Copyright (C) 2022-2022 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include <assert.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <unistd.h>
#include <sys/mman.h>
/* "JIT-ed" function, with the prototype `long (long, long)`. */
static const unsigned char jit_function_add_code[] = {
0x48, 0x01, 0xfe, /* add %rdi,%rsi */
0x48, 0x89, 0xf0, /* mov %rsi,%rax */
0xc3, /* retq */
};
void jit_register_code (char * name, uintptr_t code, size_t size)
{
}
int
main (int argc, char **argv)
{
void *code = mmap (NULL, getpagesize (), PROT_WRITE | PROT_EXEC,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
assert (code != MAP_FAILED);
/* "Compile" jit_function_add. */
memcpy (code, jit_function_add_code,
sizeof (jit_function_add_code));
jit_register_code("jit_function_add", (uintptr_t)code, sizeof (jit_function_add_code));
assert (((long (*)(long, long))code)(1,5) == 6); /* breakpoint 1 line */
return 0;
}
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