--- /dev/null
+/*
+ * Check the lz insn.
+ */
+
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include "sys.h"
+
+#define __LINUX_KERNEL_VERSION 131584
+
+#define DL_SYSDEP_OSCHECK(FATAL) \
+ do { \
+ /* Test whether the kernel is new enough. This test is only \
+ performed if the library is not compiled to run on all \
+ kernels. */ \
+ if (__LINUX_KERNEL_VERSION > 0) \
+ { \
+ char bufmem[64]; \
+ char *buf = bufmem; \
+ unsigned int version; \
+ int parts; \
+ char *cp; \
+ struct utsname uts; \
+ \
+ /* Try the uname syscall */ \
+ if (__uname (&uts)) \
+ { \
+ /* This was not successful. Now try reading the /proc \
+ filesystem. */ \
+ ssize_t reslen; \
+ int fd = __open ("/proc/sys/kernel/osrelease", O_RDONLY); \
+ if (fd == -1 \
+ || (reslen = __read (fd, bufmem, sizeof (bufmem))) <= 0) \
+ /* This also didn't work. We give up since we cannot \
+ make sure the library can actually work. */ \
+ FATAL ("FATAL: cannot determine library version\n"); \
+ __close (fd); \
+ buf[MIN (reslen, (ssize_t) sizeof (bufmem) - 1)] = '\0'; \
+ } \
+ else \
+ buf = uts.release; \
+ \
+ /* Now convert it into a number. The string consists of at most \
+ three parts. */ \
+ version = 0; \
+ parts = 0; \
+ cp = buf; \
+ while ((*cp >= '0') && (*cp <= '9')) \
+ { \
+ unsigned int here = *cp++ - '0'; \
+ \
+ while ((*cp >= '0') && (*cp <= '9')) \
+ { \
+ here *= 10; \
+ here += *cp++ - '0'; \
+ } \
+ \
+ ++parts; \
+ version <<= 8; \
+ version |= here; \
+ \
+ if (*cp++ != '.') \
+ /* Another part following? */ \
+ break; \
+ } \
+ \
+ if (parts < 3) \
+ version <<= 8 * (3 - parts); \
+ \
+ /* Now we can test with the required version. */ \
+ if (version < __LINUX_KERNEL_VERSION) \
+ /* Not sufficient. */ \
+ FATAL ("FATAL: kernel too old\n"); \
+ \
+ _dl_osversion = version; \
+ } \
+ } while (0)
+
+int main(void)
+{
+ char bufmem[64] = "2.6.22";
+ char *buf = bufmem;
+ unsigned int version;
+ int parts;
+ char *cp;
+
+ version = 0;
+ parts = 0;
+ cp = buf;
+ while ((*cp >= '0') && (*cp <= '9'))
+ {
+ unsigned int here = *cp++ - '0';
+
+ while ((*cp >= '0') && (*cp <= '9'))
+ {
+ here *= 10;
+ here += *cp++ - '0';
+ }
+
+ ++parts;
+ version <<= 8;
+ version |= here;
+
+ if (*cp++ != '.')
+ /* Another part following? */
+ break;
+ }
+
+ if (parts < 3)
+ version <<= 8 * (3 - parts);
+ if (version < __LINUX_KERNEL_VERSION)
+ err();
+ pass();
+ exit(0);
+}
Code Review / kvmfornfv.git / blobdiff