int
dwarf_get_loclist_entry(Dwarf_Debug dbg, Dwarf_Unsigned offset,
Dwarf_Addr *hipc, Dwarf_Addr *lopc, Dwarf_Ptr *data,
Dwarf_Unsigned *entry_len, Dwarf_Unsigned *next_entry,
Dwarf_Error *error)
{
Dwarf_Loclist ll, next_ll;
Dwarf_Locdesc *ld;
Dwarf_Section *ds;
int i, ret;
if (dbg == NULL || hipc == NULL || lopc == NULL || data == NULL ||
entry_len == NULL || next_entry == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
ret = _dwarf_loclist_find(dbg, STAILQ_FIRST(&dbg->dbg_cu), offset, &ll,
error);
if (ret == DW_DLE_NO_ENTRY) {
DWARF_SET_ERROR(dbg, error, DW_DLV_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
} else if (ret != DW_DLE_NONE)
return (DW_DLV_ERROR);
*hipc = *lopc = 0;
for (i = 0; i < ll->ll_ldlen; i++) {
ld = ll->ll_ldlist[i];
if (i == 0) {
*hipc = ld->ld_hipc;
*lopc = ld->ld_lopc;
} else {
if (ld->ld_lopc < *lopc)
*lopc = ld->ld_lopc;
if (ld->ld_hipc > *hipc)
*hipc = ld->ld_hipc;
}
}
ds = _dwarf_find_section(dbg, ".debug_loc");
assert(ds != NULL);
*data = (uint8_t *) ds->ds_data + ll->ll_offset;
*entry_len = ll->ll_length;
next_ll = TAILQ_NEXT(ll, ll_next);
if (next_ll != NULL)
*next_entry = next_ll->ll_offset;
else
*next_entry = ds->ds_size;
return (DW_DLV_OK);
}
int
dwarf_get_loclist_entry(Dwarf_Debug dbg, Dwarf_Unsigned offset,
Dwarf_Addr *hipc, Dwarf_Addr *lopc, Dwarf_Ptr *data,
Dwarf_Unsigned *entry_len, Dwarf_Unsigned *next_entry,
Dwarf_Error *error)
{
Dwarf_Locdesc *ld, **llbuf;
Dwarf_Section *ds;
Dwarf_Signed listlen;
int i, ret;
/*
* Note that this API sometimes will not work correctly because
* it assumes that all units have the same pointer size and offset
* size.
*/
if (dbg == NULL || hipc == NULL || lopc == NULL || data == NULL ||
entry_len == NULL || next_entry == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
ret = _dwarf_loclist_find(dbg, STAILQ_FIRST(&dbg->dbg_cu), offset,
&llbuf, &listlen, entry_len, error);
if (ret == DW_DLE_NO_ENTRY) {
DWARF_SET_ERROR(dbg, error, DW_DLV_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
} else if (ret != DW_DLE_NONE)
return (DW_DLV_ERROR);
*hipc = *lopc = 0;
for (i = 0; i < listlen; i++) {
ld = llbuf[i];
if (i == 0) {
*hipc = ld->ld_hipc;
*lopc = ld->ld_lopc;
} else {
if (ld->ld_lopc < *lopc)
*lopc = ld->ld_lopc;
if (ld->ld_hipc > *hipc)
*hipc = ld->ld_hipc;
}
}
ds = _dwarf_find_section(dbg, ".debug_loc");
assert(ds != NULL);
*data = (uint8_t *) ds->ds_data + offset;
*next_entry = offset + *entry_len;
return (DW_DLV_OK);
}
int
dwarf_loclist(Dwarf_Attribute at, Dwarf_Locdesc **llbuf,
Dwarf_Signed *listlen, Dwarf_Error *error)
{
Dwarf_Loclist ll;
Dwarf_Debug dbg;
int ret;
dbg = at != NULL ? at->at_die->die_dbg : NULL;
if (at == NULL || llbuf == NULL || listlen == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
switch (at->at_attrib) {
case DW_AT_location:
case DW_AT_string_length:
case DW_AT_return_addr:
case DW_AT_data_member_location:
case DW_AT_frame_base:
case DW_AT_segment:
case DW_AT_static_link:
case DW_AT_use_location:
case DW_AT_vtable_elem_location:
switch (at->at_form) {
case DW_FORM_data4:
case DW_FORM_data8:
ret = _dwarf_loclist_find(at->at_die->die_dbg,
at->at_die->die_cu, at->u[0].u64, &ll, error);
if (ret == DW_DLE_NO_ENTRY) {
DWARF_SET_ERROR(dbg, error, DW_DLV_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
if (ret != DW_DLE_NONE)
return (DW_DLV_ERROR);
*llbuf = ll->ll_ldlist[0];
*listlen = 1;
return (DW_DLV_OK);
case DW_FORM_block:
case DW_FORM_block1:
case DW_FORM_block2:
case DW_FORM_block4:
if (at->at_ld == NULL) {
ret = _dwarf_loc_add(at->at_die, at, error);
if (ret != DW_DLE_NONE)
return (DW_DLV_ERROR);
}
*llbuf = at->at_ld;
*listlen = 1;
return (DW_DLV_OK);
default:
DWARF_SET_ERROR(dbg, error, DW_DLE_ATTR_FORM_BAD);
return (DW_DLV_ERROR);
}
default:
/* Wrong attr supplied. */
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
}
int
dwarf_loclist_n(Dwarf_Attribute at, Dwarf_Locdesc ***llbuf,
Dwarf_Signed *listlen, Dwarf_Error *error)
{
Dwarf_Debug dbg;
int ret;
dbg = at != NULL ? at->at_die->die_dbg : NULL;
if (at == NULL || llbuf == NULL || listlen == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
switch (at->at_attrib) {
case DW_AT_location:
case DW_AT_string_length:
case DW_AT_return_addr:
case DW_AT_data_member_location:
case DW_AT_frame_base:
case DW_AT_segment:
case DW_AT_static_link:
case DW_AT_use_location:
case DW_AT_vtable_elem_location:
switch (at->at_form) {
case DW_FORM_data4:
case DW_FORM_data8:
/*
* DW_FORM_data[48] can not be used as section offset
* since DWARF4. For DWARF[23], the application needs
* to determine if DW_FORM_data[48] is representing
* a constant or a section offset.
*/
if (at->at_die->die_cu->cu_version >= 4) {
DWARF_SET_ERROR(dbg, error, DW_DLE_NO_ENTRY);
return (DW_DLV_NO_ENTRY);
}
/* FALLTHROUGH */
case DW_FORM_sec_offset:
ret = _dwarf_loclist_find(dbg, at->at_die->die_cu,
at->u[0].u64, llbuf, listlen, NULL, error);
if (ret == DW_DLE_NO_ENTRY) {
DWARF_SET_ERROR(dbg, error, ret);
return (DW_DLV_NO_ENTRY);
}
if (ret != DW_DLE_NONE)
return (DW_DLV_ERROR);
return (DW_DLV_OK);
case DW_FORM_block:
case DW_FORM_block1:
case DW_FORM_block2:
case DW_FORM_block4:
case DW_FORM_exprloc:
if (at->at_ld == NULL) {
ret = _dwarf_loc_add(at->at_die, at, error);
if (ret != DW_DLE_NONE)
return (DW_DLV_ERROR);
}
*llbuf = calloc(1, sizeof(Dwarf_Locdesc *));
if (*llbuf == NULL) {
DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
return (DW_DLV_ERROR);
}
(*llbuf)[0] = calloc(1, sizeof(Dwarf_Locdesc));
if ((*llbuf)[0] == NULL) {
free(*llbuf);
DWARF_SET_ERROR(dbg, error, DW_DLE_MEMORY);
return (DW_DLV_ERROR);
}
if (copy_locdesc(dbg, (*llbuf)[0], at->at_ld, error) !=
DW_DLE_NONE) {
free((*llbuf)[0]);
free(*llbuf);
return (DW_DLV_ERROR);
}
*listlen = 1;
return (DW_DLV_OK);
default:
/* Malformed Attr? */
DWARF_SET_ERROR(dbg, error, DW_DLE_ATTR_FORM_BAD);
return (DW_DLV_NO_ENTRY);
}
default:
/* Wrong attr supplied. */
DWARF_SET_ERROR(dbg, error, DW_DLE_ARGUMENT);
return (DW_DLV_ERROR);
}
}
