void *
kernel_malloc(size_t nbytes)
{
union overhead *op;
int bucket;
size_t amt;
/*
* First time malloc is called, setup page size and
* align break pointer so all data will be page aligned.
*/
if (pagesz == 0) {
pagesz = CHERIOS_PAGESIZE;
init_pagebucket();
__init_heap(pagesz);
}
kernel_assert(pagesz != 0);
/*
* Convert amount of memory requested into closest block size
* stored in hash buckets which satisfies request.
* Account for space used per block for accounting.
*/
if (nbytes <= pagesz - sizeof (*op)) {
amt = 32; /* size of first bucket */
bucket = 2;
} else {
amt = pagesz;
bucket = pagebucket;
}
while (nbytes > (size_t)amt - sizeof(*op)) {
amt <<= 1;
if (amt == 0)
return (NULL);
bucket++;
}
/*
* If nothing in hash bucket right now,
* request more memory from the system.
*/
if ((op = nextf[bucket]) == NULL) {
morecore(bucket);
if ((op = nextf[bucket]) == NULL)
return (NULL);
}
/* remove from linked list */
nextf[bucket] = op->ov_next;
op->ov_magic = MAGIC;
op->ov_index = bucket;
return (cheri_setbounds(op + 1, nbytes));
}
void
initialize_before(image_id imageID)
{
char *programPath = __gRuntimeLoader->program_args->args[0];
if (programPath) {
if ((__progname = strrchr(programPath, '/')) == NULL)
__progname = programPath;
else
__progname++;
}
__libc_argc = __gRuntimeLoader->program_args->arg_count;
__libc_argv = __gRuntimeLoader->program_args->args;
__gRuntimeLoader->call_atexit_hooks_for_range
= _call_atexit_hooks_for_range;
__init_exit_stack_lock();
__init_time();
__init_fork();
__init_heap();
__init_env(__gRuntimeLoader->program_args);
__init_pwd_backend();
}
void
initialize_before(image_id imageID)
{
system_info info;
char *programPath = __gRuntimeLoader->program_args->args[0];
__gCommPageAddress = __gRuntimeLoader->commpage_address;
__gABIVersion = __gRuntimeLoader->abi_version;
if (programPath) {
if ((__progname = strrchr(programPath, '/')) == NULL)
__progname = programPath;
else
__progname++;
}
__libc_argc = __gRuntimeLoader->program_args->arg_count;
__libc_argv = __gRuntimeLoader->program_args->args;
__gRuntimeLoader->call_atexit_hooks_for_range
= _call_atexit_hooks_for_range;
if (__gRuntimeLoader->program_args->umask != (mode_t)-1)
umask(__gRuntimeLoader->program_args->umask);
pthread_self()->id = find_thread(NULL);
get_system_info(&info);
__gCPUCount = info.cpu_count;
__init_time((addr_t)__gCommPageAddress);
__init_heap();
__init_env(__gRuntimeLoader->program_args);
__init_heap_post_env();
__init_pwd_backend();
__set_stack_protection();
}
