static void
kt_load_module(kt_data_t *kt, mdb_tgt_t *t, kt_module_t *km)
{
km->km_data = mdb_alloc(km->km_datasz, UM_SLEEP);
(void) mdb_tgt_vread(t, km->km_data, km->km_datasz, km->km_symspace_va);
km->km_symbuf = (void *)
KT_RELOC_BUF(km->km_symtab_va, km->km_symspace_va, km->km_data);
km->km_strtab = (char *)
KT_RELOC_BUF(km->km_strtab_va, km->km_symspace_va, km->km_data);
km->km_symtab = mdb_gelf_symtab_create_raw(&kt->k_file->gf_ehdr,
&km->km_symtab_hdr, km->km_symbuf,
&km->km_strtab_hdr, km->km_strtab, MDB_TGT_SYMTAB);
}
/*
* Called by the kmdb_kvm target upon debugger reentry, this routine checks
* to see if the loaded dmods have changed. Of particular interest is the
* exportation of dmod symbol tables, which will happen during the boot
* process for dmods that were loaded prior to kernel startup. If this
* has occurred, we'll need to reconstruct our view of the symbol tables for
* the affected dmods, since the old symbol tables lived in bootmem
* and have been moved during the kobj_export_module().
*
* Also, any ctf_file_t we might have opened is now invalid, since it
* has internal pointers to the old data as well.
*/
void
kmdb_module_sync(void)
{
mdb_var_t *v;
mdb_nv_rewind(&mdb.m_dmodctl);
while ((v = mdb_nv_advance(&mdb.m_dmodctl)) != NULL) {
kmdb_modctl_t *kmc = MDB_NV_COOKIE(v);
struct module *mp;
if (kmc->kmc_state != KMDB_MC_STATE_LOADED)
continue;
mp = kmc->kmc_modctl->mod_mp;
if ((mp->flags & (KOBJ_PRIM | KOBJ_EXPORTED)) &&
!kmc->kmc_exported) {
/*
* The exporting process moves the symtab from boot
* scratch memory to vmem.
*/
if (kmc->kmc_symtab != NULL)
mdb_gelf_symtab_destroy(kmc->kmc_symtab);
kmc->kmc_symtab = mdb_gelf_symtab_create_raw(
&kmc->kmc_ehdr, mp->symhdr, mp->symtbl, mp->strhdr,
mp->strings, MDB_TGT_SYMTAB);
if (kmc->kmc_mod->mod_ctfp != NULL) {
ctf_close(kmc->kmc_mod->mod_ctfp);
kmc->kmc_mod->mod_ctfp =
mdb_ctf_open(kmc->kmc_modname, NULL);
}
kmc->kmc_exported = TRUE;
}
}
}
int
kmdb_module_loaded(kmdb_wr_load_t *dlr)
{
struct modctl *modp = dlr->dlr_modctl;
const char *modname = strbasename(dlr->dlr_fname);
struct module *mp;
kmdb_modctl_t *kmc;
mdb_var_t *v;
v = mdb_nv_lookup(&mdb.m_dmodctl, modname);
if (dlr->dlr_errno != 0) {
/*
* We're somewhat limited in the diagnostics that we can
* provide in the event of a failed load. In most load-failure
* cases, the driver can only send up a generic errno. We use
* EMDB_ENOMOD to signal generic errors, and supply our own
* message. This twists the meaning of EMDB_NOMOD somewhat, but
* it's better than defining a new one.
*/
if (dlr->dlr_errno == EMDB_NOMOD) {
mdb_warn("%s does not appear to be a kmdb dmod\n",
modname);
} else {
(void) set_errno(dlr->dlr_errno);
mdb_warn("dmod %s failed to load", modname);
}
if (v != NULL)
mdb_nv_remove(&mdb.m_dmodctl, v);
return (0);
}
if ((mp = modp->mod_mp) == NULL || mp->symhdr == NULL ||
mp->strhdr == NULL || mp->symtbl == NULL || mp->strings == NULL) {
mdb_warn("dmod %s did not load properly\n");
goto module_loaded_err;
}
if ((v = mdb_nv_lookup(&mdb.m_dmodctl, modname)) == NULL) {
kmc = mdb_zalloc(sizeof (kmdb_modctl_t), UM_SLEEP);
kmc->kmc_loadmode = MDB_MOD_LOCAL;
kmc->kmc_modname = strdup(modname);
kmc->kmc_state = KMDB_MC_STATE_LOADING;
(void) mdb_nv_insert(&mdb.m_dmodctl, modname, NULL,
(uintptr_t)kmc, 0);
} else {
kmc = MDB_NV_COOKIE(v);
ASSERT(kmc->kmc_symtab == NULL);
}
kmc->kmc_modctl = modp;
kmc->kmc_exported = (mp->flags & KOBJ_EXPORTED) != 0;
mdb_gelf_ehdr_to_gehdr(&mp->hdr, &kmc->kmc_ehdr);
kmc->kmc_symtab = mdb_gelf_symtab_create_raw(&kmc->kmc_ehdr, mp->symhdr,
mp->symtbl, mp->strhdr, mp->strings,
MDB_TGT_SYMTAB);
if (mp->flags & KOBJ_PRIM)
kmc->kmc_flags |= KMDB_MC_FL_NOUNLOAD;
if (mdb_module_create(modname, modp->mod_filename,
kmc->kmc_loadmode, &kmc->kmc_mod) < 0)
goto module_loaded_err;
kmc->kmc_state = KMDB_MC_STATE_LOADED;
return (1);
module_loaded_err:
if (kmc->kmc_symtab != NULL)
mdb_gelf_symtab_destroy(kmc->kmc_symtab);
kmdb_module_request_unload(kmc, kmc->kmc_modname, MDB_MOD_DEFER);
return (0);
}
