Add the rt linux 4.1.3-rt3 as base

[kvmfornfv.git] / kernel / scripts / mod / mk_elfconfig.c

diff --git a/kernel/scripts/mod/mk_elfconfig.c b/kernel/scripts/mod/mk_elfconfig.c
new file mode 100644 (file)
index 0000000..a4fd71d
--- /dev/null
+++ b/kernel/scripts/mod/mk_elfconfig.c
@@ -0,0 +1,56 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <elf.h>
+
+int
+main(int argc, char **argv)
+{
+       unsigned char ei[EI_NIDENT];
+       union { short s; char c[2]; } endian_test;
+
+       if (fread(ei, 1, EI_NIDENT, stdin) != EI_NIDENT) {
+               fprintf(stderr, "Error: input truncated\n");
+               return 1;
+       }
+       if (memcmp(ei, ELFMAG, SELFMAG) != 0) {
+               fprintf(stderr, "Error: not ELF\n");
+               return 1;
+       }
+       switch (ei[EI_CLASS]) {
+       case ELFCLASS32:
+               printf("#define KERNEL_ELFCLASS ELFCLASS32\n");
+               break;
+       case ELFCLASS64:
+               printf("#define KERNEL_ELFCLASS ELFCLASS64\n");
+               break;
+       default:
+               exit(1);
+       }
+       switch (ei[EI_DATA]) {
+       case ELFDATA2LSB:
+               printf("#define KERNEL_ELFDATA ELFDATA2LSB\n");
+               break;
+       case ELFDATA2MSB:
+               printf("#define KERNEL_ELFDATA ELFDATA2MSB\n");
+               break;
+       default:
+               exit(1);
+       }
+
+       if (sizeof(unsigned long) == 4) {
+               printf("#define HOST_ELFCLASS ELFCLASS32\n");
+       } else if (sizeof(unsigned long) == 8) {
+               printf("#define HOST_ELFCLASS ELFCLASS64\n");
+       }
+
+       endian_test.s = 0x0102;
+       if (memcmp(endian_test.c, "\x01\x02", 2) == 0)
+               printf("#define HOST_ELFDATA ELFDATA2MSB\n");
+       else if (memcmp(endian_test.c, "\x02\x01", 2) == 0)
+               printf("#define HOST_ELFDATA ELFDATA2LSB\n");
+       else
+               exit(1);
+
+       return 0;
+}