int compile_for_platform(Cell* expr, Cell** res) {
jit_out = fopen("/tmp/jit_out.s","w");
jit_init();
register void* sp asm ("sp");
Frame empty_frame = {NULL, 0, 0, sp};
int success = compile_expr(expr, &empty_frame, TAG_ANY);
jit_ret();
if (!success) {
printf("<compile_expr failed: %d>\r\n",success);
}
if (success) {
int codesz = 1024;
fclose(jit_out);
struct stat src_stat;
stat("/tmp/jit_out.s", &src_stat);
off_t generated_sz = src_stat.st_size;
FILE* asm_f = fopen("/tmp/jit_out.s","r");
uint32_t* jit_asm = malloc(generated_sz);
memset(jit_asm,0,generated_sz);
fread(jit_asm,1,generated_sz,asm_f);
fclose(asm_f);
#ifdef DEBUG
printf("\nJIT ---------------------\n%s-------------------------\n\n",jit_asm);
#endif
free(jit_asm);
// prefix with arm-none-eabi- on ARM -mlittle-endian
system("as -L /tmp/jit_out.s -o /tmp/jit_out.o");
#if defined(__APPLE__) && defined(__MACH__)
system("gobjcopy /tmp/jit_out.o -O binary /tmp/jit_out.bin");
#else
system("objcopy /tmp/jit_out.o -O binary /tmp/jit_out.bin");
#endif
stat("/tmp/jit_out.bin", &src_stat);
generated_sz = src_stat.st_size;
while (generated_sz>codesz) {
codesz*=2;
printf ("<compiler: doubling code block size to %d>\r\n",codesz);
}
FILE* binary_f = fopen("/tmp/jit_out.bin","r");
uint32_t* jit_binary = mmap(0, codesz, PROT_READ | PROT_WRITE, MAP_PRIVATE|MAP_ANONYMOUS, 0, 0);
int bytes_read = fread(jit_binary,1,codesz,binary_f);
fclose(binary_f);
#ifdef DEBUG
printf("<assembled bytes: %d at: %p>\n",bytes_read,jit_binary);
char cmd[256];
sprintf(cmd,"cp /tmp/jit_out.o /tmp/jit_%p.o",jit_binary);
system(cmd);
sprintf(cmd,"cp /tmp/jit_out.s /tmp/jit_%p.s",jit_binary);
system(cmd);
#endif
if (bytes_read>codesz) {
printf("<error: max assembly size of %d exhausted. aborting>\n",codesz);
munmap(jit_binary,codesz);
return 0;
}
// read symbols for linking lambdas
#if defined(__APPLE__) && defined(__MACH__)
system("gnm /tmp/jit_out.o > /tmp/jit_out.syms 2> /dev/null");
#else
system("nm /tmp/jit_out.o > /tmp/jit_out.syms");
#endif
FILE* link_f = fopen("/tmp/jit_out.syms","r");
if (link_f) {
char* link_line=malloc(128);
while(fgets(link_line, 128, link_f)) {
if (strlen(link_line)>22) {
char ida=link_line[19];
char idb=link_line[20];
char idc=link_line[21];
//printf("link_line: %s %c %c %c\n",link_line,ida,idb,idc);
if (ida=='L' && idc=='_') {
Cell* lambda = (Cell*)strtoul(&link_line[24], NULL, 16);
if (idb=='0') {
// function entrypoint
// TODO: 64/32 bit
unsigned long long offset = strtoul(link_line, NULL, 16);
void* binary = ((uint8_t*)jit_binary) + offset;
//printf("function %p entrypoint: %p (+%ld)\n",lambda,binary,offset);
if (lambda->tag == TAG_LAMBDA) {
lambda->dr.next = binary;
} else {
printf("fatal error: no lambda found at %p!\n",lambda);
}
}
else if (idb=='1') {
// function exit
unsigned long long offset = strtoul(link_line, NULL, 16);
//printf("function exit point: %p\n",offset);
}
}
}
}
free(link_line);
}
int mp_res = mprotect(jit_binary, codesz, PROT_EXEC|PROT_READ);
if (!mp_res) {
*res = execute_jitted(jit_binary);
success = 1;
} else {
printf("<mprotect result: %d\n>",mp_res);
*res = NULL;
success = 0;
}
}
return success;
}
jit_initializer()
{
jit_init();
}
