libtokencap ported to OpenBSD
MODIFY
libtokencap/Makefile
libtokencap/Makefile
@@ -30,6 +30,9 @@ endif
ifeq "$(shell uname)" "FreeBSD"
TARGETS = libtokencap.so
endif
+ifeq "$(shell uname)" "OpenBSD"
+ TARGETS = libtokencap.so
+endif
all: $(TARGETS)
libtokencap.so: libtokencap.so.c ../config.h

MODIFY
libtokencap/libtokencap.so.c
libtokencap/libtokencap.so.c
#include "../types.h"
#include "../config.h"
-#if !defined __linux__ && !defined __APPLE__ && !defined __FreeBSD__
+#if !defined __linux__ && !defined __APPLE__ && !defined __FreeBSD__ && !defined __OpenBSD__
# error "Sorry, this library is unsupported in this platform for now!"
#endif /* !__linux__ && !__APPLE__ && ! __FreeBSD__ */
#if defined __APPLE__
# include <mach/vm_map.h>
# include <mach/mach_init.h>
-#elif defined __FreeBSD__
+#elif defined __FreeBSD__ || defined __OpenBSD__
# include <sys/types.h>
# include <sys/sysctl.h>
# include <sys/user.h>
@@ -111,17 +111,29 @@ static void __tokencap_load_mappings(void) {
}
}
-#elif defined __FreeBSD__
+#elif defined __FreeBSD__ || defined __OpenBSD__
+#if defined __FreeBSD__
int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, getpid()};
+#elif defined __OpenBSD__
+ int mib[] = {CTL_KERN, KERN_PROC_VMMAP, getpid()};
+#endif
char *buf, *low, *high;
size_t miblen = sizeof(mib)/sizeof(mib[0]);
size_t len;
if (sysctl(mib, miblen, NULL, &len, NULL, 0) == -1) return;
+#if defined __FreeBSD__
len = len * 4 / 3;
+#elif defined __OpenBSD__
+ len -= len % sizeof(struct kinfo_vmentry);
+#endif
+
buf = mmap(NULL, len, PROT_READ | PROT_WRITE, MAP_SHARED | MAP_ANON, -1, 0);
+ if (!buf) {
+ return;
+ }
if (sysctl(mib, miblen, buf, &len, NULL, 0) == -1) {
@@ -137,6 +149,9 @@ static void __tokencap_load_mappings(void) {
while (low < high) {
struct kinfo_vmentry *region = (struct kinfo_vmentry *)low;
+
+#if defined __FreeBSD__
+
size_t size = region->kve_structsize;
if (size == 0) break;
@@ -144,6 +159,15 @@ static void __tokencap_load_mappings(void) {
/* We go through the whole mapping of the process and track read-only addresses */
if ((region->kve_protection & KVME_PROT_READ) &&
!(region->kve_protection & KVME_PROT_WRITE)) {
+
+#elif defined __OpenBSD__
+
+ size_t size = sizeof (*region);
+
+ /* We go through the whole mapping of the process and track read-only addresses */
+ if ((region->kve_protection & KVE_PROT_READ) &&
+ !(region->kve_protection & KVE_PROT_WRITE)) {
+#endif
__tokencap_ro[__tokencap_ro_cnt].st = (void *)region->kve_start;
__tokencap_ro[__tokencap_ro_cnt].en = (void *)region->kve_end;

libtokencap ported to OpenBSD