Add tool to dump /proc/cpuinfo under AArch32 on AArch64 systems

1 files changed, 45 insertions, 0 deletions

diff --git a/tools/cpuinfo-dump.c b/tools/cpuinfo-dump.c
new file mode 100644
index 0000000..5b5228a
--- /dev/null
+++ b/tools/cpuinfo-dump.c
@@ -0,0 +1,45 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <errno.h>
+
+
+#define BUFFER_SIZE 4096
+char buffer[BUFFER_SIZE];
+
+#define CPUINFO_PATH "/proc/cpuinfo"
+
+int main(int argc, char** argv) {
+	int file = open(CPUINFO_PATH, O_RDONLY);
+	if (file == -1) {
+		fprintf(stderr, "Error: failed to open %s: %s\n", CPUINFO_PATH, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+
+	/* Only used for error reporting */
+	size_t position = 0;
+	char* data_start = buffer;
+	ssize_t bytes_read;
+	do {
+		bytes_read = read(file, buffer, BUFFER_SIZE);
+		if (bytes_read < 0) {
+			fprintf(stderr, "Error: failed to read file %s at position %zu: %s\n",
+				CPUINFO_PATH, position, strerror(errno));
+			exit(EXIT_FAILURE);
+		}
+
+		position += (size_t) bytes_read;
+		if (bytes_read > 0) {
+			fwrite(buffer, 1, (size_t) bytes_read, stdout);
+		}
+	} while (bytes_read != 0);
+
+	if (close(file) != 0) {
+		fprintf(stderr, "Error: failed to close %s: %s\n", CPUINFO_PATH, strerror(errno));
+		exit(EXIT_FAILURE);
+	}
+	return EXIT_SUCCESS;
+}