static int section_match(const struct pt_section *lhs,
const struct pt_section *rhs)
{
const char *lfilename, *rfilename;
if (!lhs || !rhs)
return -pte_internal;
if (pt_section_offset(lhs) != pt_section_offset(rhs))
return 0;
if (pt_section_size(lhs) != pt_section_size(rhs))
return 0;
lfilename = pt_section_filename(lhs);
rfilename = pt_section_filename(rhs);
if (!lfilename || !rfilename)
return -pte_internal;
if (strcmp(lfilename, rfilename) != 0)
return 0;
return 1;
}
int pt_section_clone(struct pt_section **pclone,
const struct pt_section *section, uint64_t offset,
uint64_t size)
{
struct pt_section *clone;
uint64_t begin, end, sbegin, send;
if (!pclone || !section)
return -pte_internal;
begin = offset;
end = begin + size;
sbegin = pt_section_offset(section);
send = sbegin + pt_section_size(section);
if (begin < sbegin || send < end)
return -pte_internal;
clone = pt_mk_section(pt_section_filename(section), offset, size);
if (!clone)
return -pte_nomem;
*pclone = clone;
return 0;
}
static int pt_image_clone(struct pt_section_list **list,
const struct pt_mapped_section *msec,
uint64_t begin, uint64_t end, int isid)
{
const struct pt_asid *masid;
struct pt_section_list *next;
struct pt_section *section, *sec;
uint64_t mbegin, sbegin, offset, size;
int errcode;
if (!list || !msec)
return -pte_internal;
sec = pt_msec_section(msec);
masid = pt_msec_asid(msec);
mbegin = pt_msec_begin(msec);
sbegin = pt_section_offset(sec);
if (end <= begin)
return -pte_internal;
if (begin < mbegin)
return -pte_internal;
offset = begin - mbegin;
size = end - begin;
errcode = pt_section_clone(§ion, sec, sbegin + offset, size);
if (errcode < 0)
return errcode;
next = pt_mk_section_list(section, masid, begin, isid);
if (!next) {
(void) pt_section_put(section);
return -pte_nomem;
}
/* The image list got its own reference; let's drop ours. */
errcode = pt_section_put(section);
if (errcode < 0) {
pt_section_list_free(next);
return errcode;
}
/* Add the new section. */
next->next = *list;
*list = next;
return 0;
}
static int pt_iscache_find_locked(struct pt_image_section_cache *iscache,
const char *filename, uint64_t offset,
uint64_t size, uint64_t laddr)
{
uint16_t idx, end;
if (!iscache || !filename)
return -pte_internal;
end = iscache->size;
for (idx = 0; idx < end; ++idx) {
const struct pt_iscache_entry *entry;
const struct pt_section *section;
const char *sec_filename;
uint64_t sec_offset, sec_size;
entry = &iscache->entries[idx];
/* We do not zero-initialize the array - a NULL check is
* pointless.
*/
section = entry->section;
sec_filename = pt_section_filename(section);
sec_offset = pt_section_offset(section);
sec_size = pt_section_size(section);
if (entry->laddr != laddr)
continue;
if (sec_offset != offset)
continue;
if (sec_size != size)
continue;
/* We should not have a section without a filename. */
if (!sec_filename)
return -pte_internal;
if (strcmp(sec_filename, filename) != 0)
continue;
return isid_from_index(idx);
}
return 0;
}
