static struct ld_input_section *
_find_and_create_gotplt_section(struct ld *ld, int create)
{
struct ld_input_section *is;
/* Check if the GOT (for PLT) section is already created. */
is = ld_input_find_internal_section(ld, ".got.plt");
if (is != NULL)
return (is);
if (create) {
is = ld_input_add_internal_section(ld, ".got.plt");
is->is_entsize = 4;
is->is_align = 4;
is->is_type = SHT_PROGBITS;
is->is_flags = SHF_ALLOC | SHF_WRITE;
/* Reserve space for the initial entries. */
(void) ld_input_reserve_ibuf(is, 3);
/* Create _GLOBAL_OFFSET_TABLE_ symbol. */
ld_symbols_add_internal(ld, "_GLOBAL_OFFSET_TABLE_", 0, 0,
is->is_index, STB_LOCAL, STT_OBJECT, STV_HIDDEN, is, NULL);
}
return (is);
}
void
ld_dynamic_reserve_dynbss_entry(struct ld *ld, struct ld_symbol *lsb)
{
struct ld_input *li;
struct ld_input_section *dynbss, *is;
u_int64_t a;
/* Create .dynbss section if it doesn't yet exist. */
dynbss = ld_input_find_internal_section(ld, ".dynbss");
if (dynbss == NULL) {
dynbss = ld_input_add_internal_section(ld, ".dynbss");
dynbss->is_type = SHT_NOBITS;
}
li = lsb->lsb_input;
assert(li != NULL && li->li_type == LIT_DSO);
/*
* TODO: we don't have to create copy relocation
* for every import object. Some import objects
* are read-only, in that case we can create other
* dynamic relocations for them.
*/
/*
* If the section to which the symbols belong has a larger
* alignment requirement, we increase .dynbss section alignment
* accordingly. XXX What if it is a DSO common symbol?
*/
is = NULL;
if (lsb->lsb_shndx != SHN_COMMON) {
assert(lsb->lsb_shndx < li->li_shnum - 1);
is = &li->li_is[lsb->lsb_shndx];
if (is->is_align > dynbss->is_align)
dynbss->is_align = is->is_align;
}
/*
* Calculate the alignment for this object.
*/
if (is != NULL) {
for (a = is->is_align; a > 1; a >>= 1) {
if ((lsb->lsb_value - is->is_off) % a == 0)
break;
}
} else
static struct ld_input_section *
_find_and_create_got_section(struct ld *ld, int create)
{
struct ld_input_section *is;
/* Check if the GOT section is already created. */
is = ld_input_find_internal_section(ld, ".got");
if (is != NULL)
return (is);
if (create) {
is = ld_input_add_internal_section(ld, ".got");
is->is_entsize = 4;
is->is_align = 4;
is->is_type = SHT_PROGBITS;
is->is_flags = SHF_ALLOC | SHF_WRITE;
}
return (is);
}
static struct ld_input_section *
_find_and_create_plt_section(struct ld *ld, int create)
{
struct ld_input_section *is;
/* Check if the PLT section is already created. */
is = ld_input_find_internal_section(ld, ".plt");
if (is != NULL)
return (is);
if (create) {
is = ld_input_add_internal_section(ld, ".plt");
is->is_entsize = 4;
is->is_align = 4;
is->is_type = SHT_PROGBITS;
is->is_flags = SHF_ALLOC | SHF_EXECINSTR;
/* Reserve space for the initial entry. */
(void) ld_input_reserve_ibuf(is, 1);
}
return (is);
}
