static int fio_ioring_init(struct thread_data *td)
{
struct ioring_data *ld;
ld = calloc(1, sizeof(*ld));
/* ring depth must be a power-of-2 */
ld->iodepth = td->o.iodepth;
td->o.iodepth = roundup_pow2(td->o.iodepth);
/* io_u index */
ld->io_u_index = calloc(td->o.iodepth, sizeof(struct io_u *));
ld->iovecs = calloc(td->o.iodepth, sizeof(struct iovec));
td->io_ops_data = ld;
return 0;
}
void
stack_init(void)
{
simple_lock_init(&stack_lock_data, 0);
if (PE_parse_boot_argn("kernel_stack_pages",
&kernel_stack_pages,
sizeof (kernel_stack_pages))) {
kernel_stack_size = kernel_stack_pages * PAGE_SIZE;
printf("stack_init: kernel_stack_pages=%d kernel_stack_size=%p\n",
kernel_stack_pages, (void *) kernel_stack_size);
}
if (kernel_stack_size < round_page(kernel_stack_size))
panic("stack_init: stack size %p not a multiple of page size %d\n",
(void *) kernel_stack_size, PAGE_SIZE);
stack_addr_mask = roundup_pow2(kernel_stack_size) - 1;
kernel_stack_mask = ~stack_addr_mask;
}
void
internal_function
_dl_determine_tlsoffset (void)
{
size_t max_align = TLS_TCB_ALIGN;
size_t freetop = 0;
size_t freebottom = 0;
/* The first element of the dtv slot info list is allocated. */
_dl_assert (_dl_tls_dtv_slotinfo_list != NULL);
/* There is at this point only one element in the
dl_tls_dtv_slotinfo_list list. */
_dl_assert (_dl_tls_dtv_slotinfo_list->next == NULL);
struct dtv_slotinfo *slotinfo = _dl_tls_dtv_slotinfo_list->slotinfo;
/* Determining the offset of the various parts of the static TLS
block has several dependencies. In addition we have to work
around bugs in some toolchains.
Each TLS block from the objects available at link time has a size
and an alignment requirement. The GNU ld computes the alignment
requirements for the data at the positions *in the file*, though.
I.e, it is not simply possible to allocate a block with the size
of the TLS program header entry. The data is layed out assuming
that the first byte of the TLS block fulfills
p_vaddr mod p_align == &TLS_BLOCK mod p_align
This means we have to add artificial padding at the beginning of
the TLS block. These bytes are never used for the TLS data in
this module but the first byte allocated must be aligned
according to mod p_align == 0 so that the first byte of the TLS
block is aligned according to p_vaddr mod p_align. This is ugly
and the linker can help by computing the offsets in the TLS block
assuming the first byte of the TLS block is aligned according to
p_align.
The extra space which might be allocated before the first byte of
the TLS block need not go unused. The code below tries to use
that memory for the next TLS block. This can work if the total
memory requirement for the next TLS block is smaller than the
gap. */
# ifdef TLS_TCB_AT_TP
/* We simply start with zero. */
size_t cnt, offset = 0;
for (cnt = 1; slotinfo[cnt].map != NULL; ++cnt)
{
_dl_assert (cnt < _dl_tls_dtv_slotinfo_list->len);
size_t firstbyte = (-slotinfo[cnt].map->l_tls_firstbyte_offset
& (slotinfo[cnt].map->l_tls_align - 1));
size_t off;
max_align = MAX (max_align, slotinfo[cnt].map->l_tls_align);
if (freebottom - freetop >= slotinfo[cnt].map->l_tls_blocksize)
{
off = roundup_pow2 (freetop + slotinfo[cnt].map->l_tls_blocksize
- firstbyte, slotinfo[cnt].map->l_tls_align)
+ firstbyte;
if (off <= freebottom)
{
freetop = off;
/* XXX For some architectures we perhaps should store the
negative offset. */
slotinfo[cnt].map->l_tls_offset = off;
continue;
}
}
off = roundup_pow2 (offset + slotinfo[cnt].map->l_tls_blocksize
- firstbyte, slotinfo[cnt].map->l_tls_align)
+ firstbyte;
if (off > offset + slotinfo[cnt].map->l_tls_blocksize
+ (freebottom - freetop))
{
freetop = offset;
freebottom = off - slotinfo[cnt].map->l_tls_blocksize;
}
offset = off;
/* XXX For some architectures we perhaps should store the
negative offset. */
slotinfo[cnt].map->l_tls_offset = off;
}
_dl_tls_static_used = offset;
_dl_tls_static_size = (roundup_pow2 (offset + TLS_STATIC_SURPLUS, max_align)
+ TLS_TCB_SIZE);
# elif defined(TLS_DTV_AT_TP)
/* The TLS blocks start right after the TCB. */
size_t offset = TLS_TCB_SIZE;
size_t cnt;
for (cnt = 1; slotinfo[cnt].map != NULL; ++cnt)
{
_dl_assert (cnt < _dl_tls_dtv_slotinfo_list->len);
size_t firstbyte = (-slotinfo[cnt].map->l_tls_firstbyte_offset
& (slotinfo[cnt].map->l_tls_align - 1));
size_t off;
max_align = MAX (max_align, slotinfo[cnt].map->l_tls_align);
if (slotinfo[cnt].map->l_tls_blocksize <= freetop - freebottom)
{
off = roundup_pow2 (freebottom, slotinfo[cnt].map->l_tls_align);
if (off - freebottom < firstbyte)
off += slotinfo[cnt].map->l_tls_align;
if (off + slotinfo[cnt].map->l_tls_blocksize - firstbyte <= freetop)
{
slotinfo[cnt].map->l_tls_offset = off - firstbyte;
freebottom = (off + slotinfo[cnt].map->l_tls_blocksize
- firstbyte);
continue;
}
}
off = roundup_pow2 (offset, slotinfo[cnt].map->l_tls_align);
if (off - offset < firstbyte)
off += slotinfo[cnt].map->l_tls_align;
slotinfo[cnt].map->l_tls_offset = off - firstbyte;
if (off - firstbyte - offset > freetop - freebottom)
{
freebottom = offset;
freetop = off - firstbyte;
}
offset = off + slotinfo[cnt].map->l_tls_blocksize - firstbyte;
}
_dl_tls_static_used = offset;
_dl_tls_static_size = roundup_pow2 (offset + TLS_STATIC_SURPLUS,
TLS_TCB_ALIGN);
# else
# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
# endif
/* The alignment requirement for the static TLS block. */
_dl_tls_static_align = max_align;
}
/*
* We are trying to perform a static TLS relocation in MAP, but it was
* dynamically loaded. This can only work if there is enough surplus in
* the static TLS area already allocated for each running thread. If this
* object's TLS segment is too big to fit, we fail. If it fits,
* we set MAP->l_tls_offset and return.
* This function intentionally does not return any value but signals error
* directly, as static TLS should be rare and code handling it should
* not be inlined as much as possible.
*/
void
internal_function __attribute_noinline__
_dl_allocate_static_tls (struct link_map *map)
{
/* If the alignment requirements are too high fail. */
if (map->l_tls_align > _dl_tls_static_align)
{
fail:
_dl_dprintf(2, "cannot allocate memory in static TLS block");
_dl_exit(30);
}
# ifdef TLS_TCB_AT_TP
size_t freebytes;
size_t n;
size_t blsize;
freebytes = _dl_tls_static_size - _dl_tls_static_used - TLS_TCB_SIZE;
blsize = map->l_tls_blocksize + map->l_tls_firstbyte_offset;
if (freebytes < blsize)
goto fail;
n = (freebytes - blsize) & ~(map->l_tls_align - 1);
size_t offset = _dl_tls_static_used + (freebytes - n
- map->l_tls_firstbyte_offset);
map->l_tls_offset = _dl_tls_static_used = offset;
# elif defined(TLS_DTV_AT_TP)
size_t used;
size_t check;
size_t offset = roundup_pow2 (_dl_tls_static_used, map->l_tls_align);
used = offset + map->l_tls_blocksize;
check = used;
/* dl_tls_static_used includes the TCB at the beginning. */
if (check > _dl_tls_static_size)
goto fail;
map->l_tls_offset = offset;
_dl_tls_static_used = used;
# else
# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined"
# endif
/*
* If the object is not yet relocated we cannot initialize the
* static TLS region. Delay it.
*/
if (((struct elf_resolve *) map)->init_flag & RELOCS_DONE)
{
#ifdef SHARED
/*
* Update the slot information data for at least the generation of
* the DSO we are allocating data for.
*/
if (__builtin_expect (THREAD_DTV()[0].counter != _dl_tls_generation, 0))
(void) _dl_update_slotinfo (map->l_tls_modid);
#endif
_dl_init_static_tls (map);
}
else
map->l_need_tls_init = 1;
}
