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Merge pull request #101 from devnexen/libtoken_catch_pid_before_all

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catching current pid before library usage in case implementations rel…
This commit is contained in:
van Hauser
2019-11-05 12:09:44 +01:00
committed by GitHub
parent dede2e9764 61e46a636c
commit 48388b9eaa
1 changed files with 5 additions and 3 deletions
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8
libtokencap/libtokencap.so.c
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@ -51,6 +51,7 @@ static struct mapping { void *st, *en; } __tokencap_ro[MAX_MAPPINGS];
static u32 __tokencap_ro_cnt;
static u8 __tokencap_ro_loaded;
static int __tokencap_out_file = -1;
static pid_t __tokencap_pid = -1;
/* Identify read-only regions in memory. Only parameters that fall into these
ranges are worth dumping when passed to strcmp() and so on. Read-write
@ -115,11 +116,11 @@ static void __tokencap_load_mappings(void) {
#elif defined __FreeBSD__ || defined __OpenBSD__ || defined __NetBSD__
#if defined __FreeBSD__
int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, -1};
int mib[] = {CTL_KERN, KERN_PROC, KERN_PROC_VMMAP, __tokencap_pid};
#elif defined __OpenBSD__
int mib[] = {CTL_KERN, KERN_PROC_VMMAP, getpid()};
int mib[] = {CTL_KERN, KERN_PROC_VMMAP, __tokencap_pid};
#elif defined __NetBSD__
int mib[] = {CTL_VM, VM_PROC, VM_PROC_MAP, getpid(), sizeof(struct kinfo_vmentry)};
int mib[] = {CTL_VM, VM_PROC, VM_PROC_MAP, __tokencap_pid, sizeof(struct kinfo_vmentry)};
#endif
char *buf, *low, *high;
size_t miblen = sizeof(mib)/sizeof(mib[0]);
@ -431,6 +432,7 @@ __attribute__((constructor)) void __tokencap_init(void) {
u8* fn = getenv("AFL_TOKEN_FILE");
if (fn) __tokencap_out_file = open(fn, O_RDWR | O_CREAT | O_APPEND, 0655);
if (__tokencap_out_file == -1) __tokencap_out_file = STDERR_FILENO;
__tokencap_pid = getpid();
}