Factor uname-based native architecture detection into a common function.

This code was copy-pasted into every architecture and was basically
identical.

Besides producing a nice net reduction in code, this factors a
portability challenge into a single function that can be easily replaced
at build-time.

Signed-off-by: Jamey Sharp <jamey@thetovacompany.com>
Signed-off-by: Simon Horman <horms@verge.net.au>

1 files changed, 23 insertions, 0 deletions

diff --git a/kexec/phys_arch.c b/kexec/phys_arch.c
new file mode 100644
index 0000000..ff8c28b
--- /dev/null
+++ b/kexec/phys_arch.c
@@ -0,0 +1,23 @@
+#include "kexec.h"
+#include <errno.h>
+#include <string.h>
+#include <sys/utsname.h>
+
+long physical_arch(void)
+{
+	struct utsname utsname;
+	int i, result = uname(&utsname);
+	if (result < 0) {
+		fprintf(stderr, "uname failed: %s\n",
+			strerror(errno));
+		return -1;
+	}
+
+	for (i = 0; arches[i].machine; ++i)
+		if (strcmp(utsname.machine, arches[i].machine) == 0)
+			return arches[i].arch;
+
+	fprintf(stderr, "Unsupported machine type: %s\n",
+		utsname.machine);
+	return -1;
+}