From: Michael Gernoth <michael@gernoth.net>
Date: Sat, 22 May 2010 23:18:13 +0000 (+0200)
Subject: Don't overload uname but set personality in library constructor
X-Git-Url: https://git.zerfleddert.de/cgi-bin/gitweb.cgi/usb-driver/commitdiff_plain/daa4fc041d1e4fdc5fb2834851a6d371ee573c02?hp=9f78065e213deae9b29c035ac6ea6dc767139aca

Don't overload uname but set personality in library constructor

This fixes planAhead crashing on startup
---

diff --git a/usb-driver.c b/usb-driver.c
index 6a7df90..44a280b 100644
--- a/usb-driver.c
+++ b/usb-driver.c
@@ -41,6 +41,8 @@
 #include <bits/wordsize.h>
 #include <sys/ipc.h>
 #include <sys/sem.h>
+#include <syscall.h>
+#include <linux/personality.h>
 #include "usb-driver.h"
 #include "config.h"
 #include "xpcu.h"
@@ -655,24 +657,6 @@ int semop (int __semid, struct sembuf *__sops, size_t __nsops) {
 }
 #endif
 
-#if __WORDSIZE == 32
-int uname (struct utsname *__name) {
-	static int (*func) (struct utsname*);
-	int ret;
-
-	if (!func)
-		func = (int (*) (struct utsname*)) dlsym(RTLD_NEXT, "uname");
-	
-	ret = (*func)(__name);
-
-	if (ret == 0 && (!strcmp(__name->machine, "x86_64"))) {
-		strcpy(__name->machine, "i686");
-	}
-	
-	return ret;
-}
-#endif
-
 /*
  * Ugly hack for ISE 12. They don't seem to open /proc/modules with
  * open() anymore...
@@ -683,3 +667,17 @@ int _Z14isModuleLoadedPci(char *module_name, int i) {
 
 	return 1;
 }
+
+static void __attribute__ ((constructor)) libusbdriver_init(void) {
+	#if __WORDSIZE == 32
+	struct utsname un;
+	int ret;
+
+	ret = uname(&un);
+
+	if (ret == 0 && (!strcmp(un.machine, "x86_64"))) {
+		DPRINTF("setting 32bit personality\n");
+		(long)syscall(SYS_personality, PER_LINUX32);
+	}
+	#endif
+}