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Updates for alignment rounding. XXX this is highly machine dependent and

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should probably be moved to i386/i386/link_machdep.c (and the same for the
alpha).
Implement "deleting" a preloaded module by destroying it's tags. This is a
hack.  We cannot reuse the data, it's been destroyed by relocation,
statically initialized variables have been modified, etc.  Note that to
reclaim the load space is going to be more machine-dependent work.
Implement a relocate hook for machdep.c to call so that the physical
addresses get converted to the equivalent KVM addresses.
This commit is contained in:
Peter Wemm 1998-10-09 23:59:01 +00:00
parent de78ca7e63
commit e4f1a52f7a
1 changed files with 134 additions and 15 deletions
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149
sys/kern/subr_module.c
View File

@ -23,7 +23,7 @@
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*
* $Id$
* $Id: subr_module.c,v 1.1 1998/10/09 00:31:29 msmith Exp $
*/
#include <sys/param.h>
@ -35,23 +35,24 @@
* Preloaded module support
*/
caddr_t module_metadata;
caddr_t preload_metadata;
/*
* Search for the preloaded module (name)
*/
caddr_t
module_search_by_name(const char *name)
preload_search_by_name(const char *name)
{
caddr_t curp;
u_int32_t *hdr;
int next;
if (module_metadata != NULL) {
if (preload_metadata != NULL) {
curp = module_metadata;
curp = preload_metadata;
for (;;) {
hdr = (u_int32_t *)curp;
if (hdr[0] == 0)
if (hdr[0] == 0 && hdr[1] == 0)
break;
/* Search for a MODINFO_NAME field */
@ -60,7 +61,9 @@ module_search_by_name(const char *name)
return(curp);
/* skip to next field */
curp += sizeof(u_int32_t) * 2 + hdr[1];
next = sizeof(u_int32_t) * 2 + hdr[1];
next = roundup(next, sizeof(u_int32_t));
curp += next;
}
}
return(NULL);
@ -70,18 +73,19 @@ module_search_by_name(const char *name)
* Search for the first preloaded module of (type)
*/
caddr_t
module_search_by_type(const char *type)
preload_search_by_type(const char *type)
{
caddr_t curp, lname;
u_int32_t *hdr;
int next;
if (module_metadata != NULL) {
if (preload_metadata != NULL) {
curp = module_metadata;
curp = preload_metadata;
lname = NULL;
for (;;) {
hdr = (u_int32_t *)curp;
if (hdr[0] == 0)
if (hdr[0] == 0 && hdr[1] == 0)
break;
/* remember the start of each record */
@ -94,7 +98,50 @@ module_search_by_type(const char *type)
return(lname);
/* skip to next field */
curp += sizeof(u_int32_t) * 2 + hdr[1];
next = sizeof(u_int32_t) * 2 + hdr[1];
next = roundup(next, sizeof(u_int32_t));
curp += next;
}
}
return(NULL);
}
/*
* Walk through the preloaded module list
*/
caddr_t
preload_search_next_name(caddr_t base)
{
caddr_t curp;
u_int32_t *hdr;
int next;
if (preload_metadata != NULL) {
/* Pick up where we left off last time */
if (base) {
/* skip to next field */
curp = base;
hdr = (u_int32_t *)curp;
next = sizeof(u_int32_t) * 2 + hdr[1];
next = roundup(next, sizeof(u_int32_t));
curp += next;
} else
curp = preload_metadata;
for (;;) {
hdr = (u_int32_t *)curp;
if (hdr[0] == 0 && hdr[1] == 0)
break;
/* Found a new record? */
if (hdr[0] == MODINFO_NAME)
return curp;
/* skip to next field */
next = sizeof(u_int32_t) * 2 + hdr[1];
next = roundup(next, sizeof(u_int32_t));
curp += next;
}
}
return(NULL);
@ -105,17 +152,18 @@ module_search_by_type(const char *type)
* to the data for the attribute (inf).
*/
caddr_t
module_search_info(caddr_t mod, int inf)
preload_search_info(caddr_t mod, int inf)
{
caddr_t curp;
u_int32_t *hdr;
u_int32_t type = 0;
int next;
curp = mod;
for (;;) {
hdr = (u_int32_t *)curp;
/* end of module data? */
if (hdr[0] == 0)
if (hdr[0] == 0 && hdr[1] == 0)
break;
/*
* We give up once we've looped back to what we were looking at
@ -137,8 +185,79 @@ module_search_info(caddr_t mod, int inf)
return(curp + (sizeof(u_int32_t) * 2));
/* skip to next field */
curp += sizeof(u_int32_t) * 2 + hdr[1];
next = sizeof(u_int32_t) * 2 + hdr[1];
next = roundup(next, sizeof(u_int32_t));
curp += next;
}
return(NULL);
}
/*
* Delete a preload record by name.
*/
void
preload_delete_name(const char *name)
{
caddr_t curp;
u_int32_t *hdr;
int next;
int clearing;
if (preload_metadata != NULL) {
clearing = 0;
curp = preload_metadata;
for (;;) {
hdr = (u_int32_t *)curp;
if (hdr[0] == 0 && hdr[1] == 0)
break;
/* Search for a MODINFO_NAME field */
if (hdr[0] == MODINFO_NAME) {
if (!strcmp(name, curp + sizeof(u_int32_t) * 2))
clearing = 1; /* got it, start clearing */
else if (clearing)
clearing = 0; /* at next one now.. better stop */
}
if (clearing)
hdr[0] = MODINFO_EMPTY;
/* skip to next field */
next = sizeof(u_int32_t) * 2 + hdr[1];
next = roundup(next, sizeof(u_int32_t));
curp += next;
}
}
}
/* Called from locore on i386. Convert physical pointers to kvm. Sigh. */
void
preload_bootstrap_relocate(vm_offset_t offset)
{
caddr_t curp;
u_int32_t *hdr;
vm_offset_t *ptr;
int next;
if (preload_metadata != NULL) {
curp = preload_metadata;
for (;;) {
hdr = (u_int32_t *)curp;
if (hdr[0] == 0 && hdr[1] == 0)
break;
/* Look for a MODINFO_ADDR field */
if (hdr[0] == MODINFO_ADDR) {
ptr = (vm_offset_t *)(curp + (sizeof(u_int32_t) * 2));
*ptr += offset;
}
/* The rest is beyond us for now */
/* skip to next field */
next = sizeof(u_int32_t) * 2 + hdr[1];
next = roundup(next, sizeof(u_int32_t));
curp += next;
}
}
}