Author: markj
Date: Tue May 26 14:05:37 2020
New Revision: 361504
URL: https://svnweb.freebsd.org/changeset/base/361504
Log:
MFC r360979:
librtld_db: Fix shlib mapping offsets.
PR: 244732
Modified:
stable/12/lib/librtld_db/rtld_db.c
Directory Properties:
stable/12/ (props changed)
Modified: stable/12/lib/librtld_db/rtld_db.c
==============================================================================
--- stable/12/lib/librtld_db/rtld_db.c Tue May 26 14:05:06 2020
(r361503)
+++ stable/12/lib/librtld_db/rtld_db.c Tue May 26 14:05:37 2020
(r361504)
@@ -160,9 +160,12 @@ rd_err_e
rd_loadobj_iter(rd_agent_t *rdap, rl_iter_f *cb, void *clnt_data)
{
struct kinfo_vmentry *kves, *kve;
+ const char *path;
+ uint64_t fileid;
rd_loadobj_t rdl;
rd_err_e ret;
- int cnt, i, lastvn;
+ uintptr_t base;
+ int cnt, i;
DPRINTF("%s\n", __func__);
@@ -171,27 +174,38 @@ rd_loadobj_iter(rd_agent_t *rdap, rl_iter_f *cb, void
return (RD_ERR);
}
+ base = 0;
+ fileid = 0;
+ path = NULL;
ret = RD_OK;
- lastvn = 0;
for (i = 0; i < cnt; i++) {
- kve = kves + i;
- if (kve->kve_type == KVME_TYPE_VNODE)
- lastvn = i;
+ kve = &kves[i];
+ /*
+ * Cache the base offset of the file mapping. The kve_offset
+ * field gives the file offset of a particular mapping into the
+ * file, but we want the mapping offset relative to the base
+ * mapping.
+ */
+ if (kve->kve_type == KVME_TYPE_VNODE &&
+ kve->kve_vn_fileid != fileid) {
+ base = kve->kve_start;
+ fileid = kve->kve_vn_fileid;
+ path = kve->kve_path;
+ }
memset(&rdl, 0, sizeof(rdl));
/*
* Map the kinfo_vmentry struct to the rd_loadobj structure.
*/
rdl.rdl_saddr = kve->kve_start;
rdl.rdl_eaddr = kve->kve_end;
- rdl.rdl_offset = kve->kve_offset;
+ rdl.rdl_offset = kve->kve_start - base;
if (kve->kve_protection & KVME_PROT_READ)
rdl.rdl_prot |= RD_RDL_R;
if (kve->kve_protection & KVME_PROT_WRITE)
rdl.rdl_prot |= RD_RDL_W;
if (kve->kve_protection & KVME_PROT_EXEC)
rdl.rdl_prot |= RD_RDL_X;
- strlcpy(rdl.rdl_path, kves[lastvn].kve_path,
- sizeof(rdl.rdl_path));
+ strlcpy(rdl.rdl_path, path, sizeof(rdl.rdl_path));
if ((*cb)(&rdl, clnt_data) != 0) {
ret = RD_ERR;
break;
_______________________________________________
svn-src-all@freebsd.org mailing list
https://lists.freebsd.org/mailman/listinfo/svn-src-all
To unsubscribe, send any mail to "svn-src-all-unsubscr...@freebsd.org"
