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authorAmmar Faizi <ammarfaizi2@gnuweeb.org>2023-01-10 10:24:33 +0300
committerPaul E. McKenney <paulmck@kernel.org>2023-01-11 00:33:56 +0300
commit7efd762e97c87f07b0a93e428e5ce3436715f538 (patch)
tree26898dc867bdf418a7d7b0ce7b079fedb90e4438 /tools/include
parentc61a078015f325fe38a7371ab0b12d4444f5fba4 (diff)
downloadlinux-7efd762e97c87f07b0a93e428e5ce3436715f538.tar.xz
nolibc/sys: Implement `getpagesize(2)` function
This function returns the page size used by the running kernel. The page size value is taken from the auxiliary vector at 'AT_PAGESZ' key. 'getpagesize(2)' is assumed as a syscall becuase the manpage placement of this function is in entry 2 ('man 2 getpagesize') despite there is no real 'getpagesize(2)' syscall in the Linux syscall table. Define this function in 'sys.h'. Signed-off-by: Ammar Faizi <ammarfaizi2@gnuweeb.org> Signed-off-by: Willy Tarreau <w@1wt.eu> Signed-off-by: Paul E. McKenney <paulmck@kernel.org>
Diffstat (limited to 'tools/include')
-rw-r--r--tools/include/nolibc/sys.h21
1 files changed, 21 insertions, 0 deletions
diff --git a/tools/include/nolibc/sys.h b/tools/include/nolibc/sys.h
index 47bf67668860..b5f8cd35c03b 100644
--- a/tools/include/nolibc/sys.h
+++ b/tools/include/nolibc/sys.h
@@ -19,6 +19,7 @@
#include <linux/fs.h>
#include <linux/loop.h>
#include <linux/time.h>
+#include <linux/auxvec.h>
#include "arch.h"
#include "errno.h"
@@ -499,6 +500,26 @@ pid_t gettid(void)
return sys_gettid();
}
+static unsigned long getauxval(unsigned long key);
+
+/*
+ * long getpagesize(void);
+ */
+
+static __attribute__((unused))
+long getpagesize(void)
+{
+ long ret;
+
+ ret = getauxval(AT_PAGESZ);
+ if (!ret) {
+ SET_ERRNO(ENOENT);
+ return -1;
+ }
+
+ return ret;
+}
+
/*
* int gettimeofday(struct timeval *tv, struct timezone *tz);