Signed-off-by: kirill tkhai <ktkhai@xxxxxxxxxxxxx>
---
fs/proc/Makefile | 1 +
fs/proc/builtin.c | 70 +++++++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 71 insertions(+)
create mode 100644 fs/proc/builtin.c
diff --git a/fs/proc/Makefile b/fs/proc/Makefile
index 7151ea4..1e13361 100644
--- a/fs/proc/Makefile
+++ b/fs/proc/Makefile
@@ -10,6 +10,7 @@ proc-$(CONFIG_MMU) := task_mmu.o
proc-y += inode.o root.o base.o generic.o array.o \
fd.o
proc-$(CONFIG_TTY) += proc_tty.o
+proc-y += builtin.o
proc-y += cmdline.o
proc-y += consoles.o
proc-y += cpuinfo.o
diff --git a/fs/proc/builtin.c b/fs/proc/builtin.c
new file mode 100644
index 0000000..2d49980
--- /dev/null
+++ b/fs/proc/builtin.c
@@ -0,0 +1,70 @@
+#include <linux/init.h>
+#include <linux/kernel.h>
+#include <linux/proc_fs.h>
+#include <linux/seq_file.h>
+
+extern char __start_builtin_drivers_list[], __stop_builtin_drivers_list[];
+
+static void *b_start(struct seq_file *m, loff_t *pos)
+{
+ unsigned long size = (unsigned long)__stop_builtin_drivers_list -
+ (unsigned long)__start_builtin_drivers_list;
+ if (*pos) {
+ /* Skip all !'\0' symbols */
+ while (*pos <= size && *(__start_builtin_drivers_list + *pos))
+ ++*pos;
+ /* Skip all '\0' symbols */
+ while (*pos <= size && !*(__start_builtin_drivers_list + *pos))
+ ++*pos;
+ }
+
+ if (*pos >= size)
+ return NULL;
+
+ return __start_builtin_drivers_list + *pos;
+}
+
+static void *b_next(struct seq_file *m, void *cur, loff_t *pos)
+{
+ ++*pos;
+
+ return b_start(m, pos);
+}
+
+static void b_stop(struct seq_file *m, void *p)
+{
+}
+
+static int b_show(struct seq_file *m, void *p)
+{
+ seq_printf(m, "%s\n", (const char *)p);
+
+ return 0;
+}
+
+static const struct seq_operations builtin_op = {
+ .start = b_start,
+ .next = b_next,
+ .stop = b_stop,
+ .show = b_show
+};
+
+static int builtin_open(struct inode *inode, struct file *file)
+{
+ return seq_open(file, &builtin_op);
+}
+
+static const struct file_operations builtin_operations = {
+ .open = builtin_open,
+ .read = seq_read,
+ .llseek = seq_lseek,
+ .release = seq_release_private,
+};
+
+static int __init proc_builtin_init(void)
+{
+ proc_create("built-in", S_IRUGO, NULL, &builtin_operations);
+ return 0;
+}
+
+fs_initcall(proc_builtin_init);
--
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