/**
* Adds a control dependence from node to dep_on.
*/
static void add_cdep(ir_node *node, ir_node *dep_on)
{
ir_cdep *dep = find_cdep(node);
assert(is_Block(dep_on));
if (dep == NULL) {
ir_cdep *newdep = OALLOC(&cdep_data->obst, ir_cdep);
newdep->node = dep_on;
newdep->next = NULL;
pmap_insert(cdep_data->cdep_map, node, newdep);
} else {
ir_cdep *newdep;
for (;;) {
if (get_cdep_node(dep) == dep_on)
return;
if (dep->next == NULL)
break;
dep = dep->next;
}
newdep = OALLOC(&cdep_data->obst, ir_cdep);
newdep->node = dep_on;
newdep->next = NULL;
dep->next = newdep;
}
}
ir_entity *create_compilerlib_entity(ident *id, ir_type *mt)
{
ir_entity *entity = pmap_get(ir_entity, irp->compilerlib_entities, id);
if (entity != NULL)
return entity;
/* let frontend mangle the name */
ident *ld_name = compilerlib_mangler(id, mt);
/* search for an existing entity */
ir_type *glob = get_glob_type();
for (size_t i = 0, n_members = get_compound_n_members(glob);
i < n_members; ++i) {
ir_entity *member = get_compound_member(glob, i);
if (get_entity_ld_ident(member) == ld_name) {
entity = member;
goto found;
}
}
entity = new_entity(glob, id, mt);
set_entity_ld_ident(entity, ld_name);
set_entity_visibility(entity, ir_visibility_external);
found:
pmap_insert(irp->compilerlib_entities, id, entity);
return entity;
}
static ir_entity *get_pic_symbol(be_main_env_t *env, ir_entity *entity)
{
ir_entity *result = pmap_get(ir_entity, env->ent_pic_symbol_map, entity);
if (result == NULL) {
result = create_pic_symbol(env, entity);
pmap_insert(env->ent_pic_symbol_map, entity, result);
}
return result;
}
/**
* Returns the trampoline entity for the given method.
*/
static ir_entity *get_trampoline(be_main_env_t *env, ir_entity *method)
{
ir_entity *result = pmap_get(ir_entity, env->ent_trampoline_map, method);
if (result == NULL) {
result = create_trampoline(env, method);
pmap_insert(env->ent_trampoline_map, method, result);
}
return result;
}
/**
* @return The lowered method type.
*/
static ir_type *lower_method_type(ir_type *mtp)
{
ir_type *res = pmap_get(ir_type, lowered_type, mtp);
if (res != NULL)
return res;
size_t const n_param = get_method_n_params(mtp);
size_t const n_res = get_method_n_ress(mtp);
bool const is_variadic = is_method_variadic(mtp);
res = new_type_method(n_param, n_res, is_variadic);
/* set param types and result types */
for (size_t i = 0; i < n_param; ++i) {
ir_type *ptp = get_method_param_type(mtp, i);
ir_mode *pmode = get_type_mode(ptp);
if (pmode != NULL && mode_is_float(pmode)) {
ptp = lower_type(ptp);
}
set_method_param_type(res, i, ptp);
}
for (size_t i = 0; i < n_res; ++i) {
ir_type *rtp = get_method_res_type(mtp, i);
ir_mode *rmode = get_type_mode(rtp);
if (rmode != NULL && mode_is_float(rmode)) {
rtp = lower_type(rtp);
}
set_method_res_type(res, i, rtp);
}
copy_method_properties(res, mtp);
set_higher_type(res, mtp);
pmap_insert(lowered_type, mtp, res);
return res;
}
void exchange_cdep(ir_node *old, const ir_node *nw)
{
ir_cdep *cdep = find_cdep(nw);
assert(is_Block(old));
pmap_insert(cdep_data->cdep_map, old, cdep);
}
// Called first from entry.S on the bootstrap processor,
// and later from boot/bootother.S on all other processors.
// As a rule, "init" functions in PIOS are called once on EACH processor.
void
init(void)
{
extern char start[], edata[], end[];
// Before anything else, complete the ELF loading process.
// Clear all uninitialized global data (BSS) in our program,
// ensuring that all static/global variables start out zero.
if (cpu_onboot())
memset(edata, 0, end - edata);
// Initialize the console.
// Can't call cprintf until after we do this!
cons_init();
extern uint8_t _binary_obj_boot_bootother_start[],
_binary_obj_boot_bootother_size[];
uint8_t *code = (uint8_t*)lowmem_bootother_vec;
memmove(code, _binary_obj_boot_bootother_start, (uint32_t) _binary_obj_boot_bootother_size);
// Lab 1: test cprintf and debug_trace
cprintf("1234 decimal is %o octal!\n", 1234);
debug_check();
// Initialize and load the bootstrap CPU's GDT, TSS, and IDT.
cpu_init();
trap_init();
// Physical memory detection/initialization.
// Can't call mem_alloc until after we do this!
mem_init();
// Lab 2: check spinlock implementation
if (cpu_onboot())
spinlock_check();
// Initialize the paged virtual memory system.
pmap_init();
// Find and start other processors in a multiprocessor system
mp_init(); // Find info about processors in system
pic_init(); // setup the legacy PIC (mainly to disable it)
ioapic_init(); // prepare to handle external device interrupts
lapic_init(); // setup this CPU's local APIC
cpu_bootothers(); // Get other processors started
// cprintf("CPU %d (%s) has booted\n", cpu_cur()->id,
// cpu_onboot() ? "BP" : "AP");
file_init(); // Create root directory and console I/O files
// Lab 4: uncomment this when you can handle IRQ_SERIAL and IRQ_KBD.
//cons_intenable(); // Let the console start producing interrupts
// Initialize the process management code.
proc_init();
// Initialize the process management code.
proc_init();
if(!cpu_onboot())
proc_sched();
proc *root = proc_root = proc_alloc(NULL,0);
elfhdr *ehs = (elfhdr *)ROOTEXE_START;
assert(ehs->e_magic == ELF_MAGIC);
proghdr *phs = (proghdr *) ((void *) ehs + ehs->e_phoff);
proghdr *ep = phs + ehs->e_phnum;
for (; phs < ep; phs++)
{
if (phs->p_type != ELF_PROG_LOAD)
continue;
void *fa = (void *) ehs + ROUNDDOWN(phs->p_offset, PAGESIZE);
uint32_t va = ROUNDDOWN(phs->p_va, PAGESIZE);
uint32_t zva = phs->p_va + phs->p_filesz;
uint32_t eva = ROUNDUP(phs->p_va + phs->p_memsz, PAGESIZE);
uint32_t perm = SYS_READ | PTE_P | PTE_U;
if(phs->p_flags & ELF_PROG_FLAG_WRITE) perm |= SYS_WRITE | PTE_W;
for (; va < eva; va += PAGESIZE, fa += PAGESIZE)
{
pageinfo *pi = mem_alloc(); assert(pi != NULL);
if(va < ROUNDDOWN(zva, PAGESIZE))
memmove(mem_pi2ptr(pi), fa, PAGESIZE);
else if (va < zva && phs->p_filesz)
{
memset(mem_pi2ptr(pi),0, PAGESIZE);
memmove(mem_pi2ptr(pi), fa, zva-va);
}
else
memset(mem_pi2ptr(pi), 0, PAGESIZE);
pte_t *pte = pmap_insert(root->pdir, pi, va, perm);
assert(pte != NULL);
}
}
root->sv.tf.eip = ehs->e_entry;
root->sv.tf.eflags |= FL_IF;
pageinfo *pi = mem_alloc(); assert(pi != NULL);
pte_t *pte = pmap_insert(root->pdir, pi, VM_STACKHI-PAGESIZE,
SYS_READ | SYS_WRITE | PTE_P | PTE_U | PTE_W);
assert(pte != NULL);
root->sv.tf.esp = VM_STACKHI;
proc_ready(root);
proc_sched();
// Initialize the I/O system.
// Lab 1: change this so it enters user() in user mode,
// running on the user_stack declared above,
// instead of just calling user() directly.
user(); // FIXME: Maybe get rid of this
}