diff --git a/libc/kernel/uapi/linux/fs.h b/libc/kernel/uapi/linux/fs.h
index 38a2d9e..adab56f 100644
--- a/libc/kernel/uapi/linux/fs.h
+++ b/libc/kernel/uapi/linux/fs.h
@@ -194,8 +194,10 @@
 #define RWF_NOWAIT (( __kernel_rwf_t) 0x00000008)
 #define RWF_APPEND (( __kernel_rwf_t) 0x00000010)
 #define RWF_NOAPPEND (( __kernel_rwf_t) 0x00000020)
-#define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT | RWF_APPEND | RWF_NOAPPEND)
-#define PAGEMAP_SCAN _IOWR('f', 16, struct pm_scan_arg)
+#define RWF_ATOMIC (( __kernel_rwf_t) 0x00000040)
+#define RWF_SUPPORTED (RWF_HIPRI | RWF_DSYNC | RWF_SYNC | RWF_NOWAIT | RWF_APPEND | RWF_NOAPPEND | RWF_ATOMIC)
+#define PROCFS_IOCTL_MAGIC 'f'
+#define PAGEMAP_SCAN _IOWR(PROCFS_IOCTL_MAGIC, 16, struct pm_scan_arg)
 #define PAGE_IS_WPALLOWED (1 << 0)
 #define PAGE_IS_WRITTEN (1 << 1)
 #define PAGE_IS_FILE (1 << 2)
@@ -225,4 +227,30 @@
   __u64 category_anyof_mask;
   __u64 return_mask;
 };
+#define PROCMAP_QUERY _IOWR(PROCFS_IOCTL_MAGIC, 17, struct procmap_query)
+enum procmap_query_flags {
+  PROCMAP_QUERY_VMA_READABLE = 0x01,
+  PROCMAP_QUERY_VMA_WRITABLE = 0x02,
+  PROCMAP_QUERY_VMA_EXECUTABLE = 0x04,
+  PROCMAP_QUERY_VMA_SHARED = 0x08,
+  PROCMAP_QUERY_COVERING_OR_NEXT_VMA = 0x10,
+  PROCMAP_QUERY_FILE_BACKED_VMA = 0x20,
+};
+struct procmap_query {
+  __u64 size;
+  __u64 query_flags;
+  __u64 query_addr;
+  __u64 vma_start;
+  __u64 vma_end;
+  __u64 vma_flags;
+  __u64 vma_page_size;
+  __u64 vma_offset;
+  __u64 inode;
+  __u32 dev_major;
+  __u32 dev_minor;
+  __u32 vma_name_size;
+  __u32 build_id_size;
+  __u64 vma_name_addr;
+  __u64 build_id_addr;
+};
 #endif