rpm/getauxval.diff

77 lines
2.0 KiB
Diff

commit 60835b20180c1be351ff95fa8c8d930afada0e4c
Author: Kirill A. Shutemov <kirill@shutemov.name>
Date: Mon Jul 1 03:25:32 2013 +0300
Use getauxval(3) to read auxv data
glibc >= 2.16 provides getauxval(): a reliable way to retrieve a value
from the auxiliary vector. It doesn't rely on /proc filesystem.
Let's switch to it and get rid of /proc dependency.
Signed-off-by: Kirill A. Shutemov <kirill@shutemov.name>
Signed-off-by: Panu Matilainen <pmatilai@redhat.com>
--- configure.ac.orig 2013-07-12 12:25:38.000000000 +0000
+++ configure.ac 2013-07-12 12:35:18.000000000 +0000
@@ -518,6 +518,7 @@ dnl Checks for library functions.
AC_CHECK_FUNCS(putenv)
AC_CHECK_FUNCS(mempcpy)
AC_CHECK_FUNCS(fdatasync)
+AC_CHECK_FUNCS(getauxval)
AC_REPLACE_FUNCS(stpcpy stpncpy)
--- lib/rpmrc.c.orig 2013-07-12 12:25:38.000000000 +0000
+++ lib/rpmrc.c 2013-07-12 12:34:34.000000000 +0000
@@ -20,6 +20,10 @@
#define __power_pc() 0
#endif
+#ifdef HAVE_GETAUXVAL
+#include <sys/auxv.h>
+#endif
+
#include <rpm/rpmlib.h> /* RPM_MACTABLE*, Rc-prototypes */
#include <rpm/rpmmacro.h>
#include <rpm/rpmfileutil.h>
@@ -922,13 +926,19 @@ static int is_geode(void)
#if defined(__linux__) && defined(__powerpc__)
/**
- * Populate rpmat structure with parsed info from /proc/self/auxv
+ * Populate rpmat structure with auxv values
*/
-static void parse_auxv(void)
+static void read_auxv(void)
{
static int oneshot = 1;
if (oneshot) {
+#ifdef HAVE_GETAUXVAL
+ rpmat.platform = (char *) getauxval(AT_PLATFORM);
+ if (!rpmat.platform)
+ rpmat.platform = "";
+ rpmat.hwcap = getauxval(AT_HWCAP);
+#else
rpmat.platform = "";
int fd = open("/proc/self/auxv", O_RDONLY);
@@ -953,6 +963,7 @@ static void parse_auxv(void)
}
close(fd);
}
+#endif
oneshot = 0; /* only try once even if it fails */
}
return;
@@ -972,7 +983,7 @@ static void defaultMachine(const char **
#if defined(__linux__) && defined(__powerpc__)
/* Populate rpmat struct with hw info */
- parse_auxv();
+ read_auxv();
#endif
while (!gotDefaults) {