7 files changed, 59 insertions, 104 deletions

diff --git a/usr/Kconfig b/usr/Kconfig
index e2721f5a3504..4780deac5974 100644
--- a/usr/Kconfig
+++ b/usr/Kconfig
@@ -72,6 +72,15 @@ config RD_LZMA
           Support loading of a LZMA encoded initial ramdisk or cpio buffer
           If unsure, say N.
 
+config RD_XZ
+        bool "Support initial ramdisks compressed using XZ" if EMBEDDED
+        default !EMBEDDED
+        depends on BLK_DEV_INITRD
+        select DECOMPRESS_XZ
+        help
+          Support loading of a XZ encoded initial ramdisk or cpio buffer.
+          If unsure, say N.
+
 config RD_LZO
         bool "Support initial ramdisks compressed using LZO" if EMBEDDED
         default !EMBEDDED
@@ -139,12 +148,21 @@ config INITRAMFS_COMPRESSION_LZMA
           three. Compression is slowest. The initramfs size is about 33%
           smaller with LZMA in comparison to gzip.
 
+config INITRAMFS_COMPRESSION_XZ
+        bool "XZ"
+        depends on RD_XZ
+        help
+          XZ uses the LZMA2 algorithm. The initramfs size is about 30%
+          smaller with XZ in comparison to gzip. Decompression speed
+          is better than that of bzip2 but worse than gzip and LZO.
+          Compression is slow.
+
 config INITRAMFS_COMPRESSION_LZO
         bool "LZO"
         depends on RD_LZO
         help
           Its compression ratio is the poorest among the four. The kernel
-          size is about about 10% bigger than gzip; however its speed
+          size is about 10% bigger than gzip; however its speed
           (both compression and decompression) is the fastest.
 
 endchoice
diff --git a/usr/Makefile b/usr/Makefile
index 1e6a9e4a72cc..029ffe6cd0d8 100644
--- a/usr/Makefile
+++ b/usr/Makefile
@@ -15,13 +15,21 @@ suffix_$(CONFIG_INITRAMFS_COMPRESSION_BZIP2)  = .bz2
 # Lzma
 suffix_$(CONFIG_INITRAMFS_COMPRESSION_LZMA)   = .lzma
 
+# XZ
+suffix_$(CONFIG_INITRAMFS_COMPRESSION_XZ)     = .xz
+
+# Lzo
+suffix_$(CONFIG_INITRAMFS_COMPRESSION_LZO)   = .lzo
+
+AFLAGS_initramfs_data.o += -DINITRAMFS_IMAGE="usr/initramfs_data.cpio$(suffix_y)"
+
 # Generate builtin.o based on initramfs_data.o
-obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data$(suffix_y).o
+obj-$(CONFIG_BLK_DEV_INITRD) := initramfs_data.o
 
 # initramfs_data.o contains the compressed initramfs_data.cpio image.
 # The image is included using .incbin, a dependency which is not
 # tracked automatically.
-$(obj)/initramfs_data$(suffix_y).o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE
+$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio$(suffix_y) FORCE
 
 #####
 # Generate the initramfs cpio archive
@@ -45,7 +53,7 @@ endif
 quiet_cmd_initfs = GEN     $@
       cmd_initfs = $(initramfs) -o $@ $(ramfs-args) $(ramfs-input)
 
-targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 initramfs_data.cpio.lzma initramfs_data.cpio
+targets := initramfs_data.cpio.gz initramfs_data.cpio.bz2 initramfs_data.cpio.lzma initramfs_data.cpio.xz initramfs_data.cpio.lzo initramfs_data.cpio
 # do not try to update files included in initramfs
 $(deps_initramfs): ;
 
diff --git a/usr/gen_init_cpio.c b/usr/gen_init_cpio.c
index b2b3c2d1cf8b..7f06884ecd41 100644
--- a/usr/gen_init_cpio.c
+++ b/usr/gen_init_cpio.c
@@ -104,6 +104,8 @@ static int cpio_mkslink(const char *name, const char *target,
         char s[256];
         time_t mtime = time(NULL);
 
+        if (name[0] == '/')
+                name++;
         sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
                "%08X%08X%08X%08X%08X%08X%08X",
                 "070701",               /* magic */
@@ -152,6 +154,8 @@ static int cpio_mkgeneric(const char *name, unsigned int mode,
         char s[256];
         time_t mtime = time(NULL);
 
+        if (name[0] == '/')
+                name++;
         sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
                "%08X%08X%08X%08X%08X%08X%08X",
                 "070701",               /* magic */
@@ -245,6 +249,8 @@ static int cpio_mknod(const char *name, unsigned int mode,
         else
                 mode |= S_IFCHR;
 
+        if (name[0] == '/')
+                name++;
         sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
                "%08X%08X%08X%08X%08X%08X%08X",
                 "070701",               /* magic */
@@ -303,18 +309,18 @@ static int cpio_mkfile(const char *name, const char *location,
 
         mode |= S_IFREG;
 
-        retval = stat (location, &buf);
-        if (retval) {
-                fprintf (stderr, "File %s could not be located\n", location);
-                goto error;
-        }
-
         file = open (location, O_RDONLY);
         if (file < 0) {
                 fprintf (stderr, "File %s could not be opened for reading\n", location);
                 goto error;
         }
 
+        retval = fstat(file, &buf);
+        if (retval) {
+                fprintf(stderr, "File %s could not be stat()'ed\n", location);
+                goto error;
+        }
+
         filebuf = malloc(buf.st_size);
         if (!filebuf) {
                 fprintf (stderr, "out of memory\n");
@@ -332,6 +338,8 @@ static int cpio_mkfile(const char *name, const char *location,
                 /* data goes on last link */
                 if (i == nlinks) size = buf.st_size;
 
+                if (name[0] == '/')
+                        name++;
                 namesize = strlen(name) + 1;
                 sprintf(s,"%s%08X%08X%08lX%08lX%08X%08lX"
                        "%08lX%08X%08X%08X%08X%08X%08X",
diff --git a/usr/initramfs_data.S b/usr/initramfs_data.S
index 7c6973d8d829..c14322d1c0cf 100644
--- a/usr/initramfs_data.S
+++ b/usr/initramfs_data.S
@@ -11,11 +11,7 @@
   -T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o
    ld -m elf_i386  -r -o built-in.o initramfs_data.o
 
-  initramfs_data.scr looks like this:
-SECTIONS
-{
-       .init.ramfs : { *(.data) }
-}
+  For including the .init.ramfs sections, see include/asm-generic/vmlinux.lds.
 
   The above example is for i386 - the parameters vary from architectures.
   Eventually look up LDFLAGS_BLOB in an older version of the
@@ -25,6 +21,18 @@ SECTIONS
   in the ELF header, as required by certain architectures.
 */
 
-.section .init.ramfs,"a"
-.incbin "usr/initramfs_data.cpio"
+#include <linux/stringify.h>
+#include <asm-generic/vmlinux.lds.h>
 
+.section .init.ramfs,"a"
+__irf_start:
+.incbin __stringify(INITRAMFS_IMAGE)
+__irf_end:
+.section .init.ramfs.info,"a"
+.globl VMLINUX_SYMBOL(__initramfs_size)
+VMLINUX_SYMBOL(__initramfs_size):
+#ifdef CONFIG_64BIT
+        .quad __irf_end - __irf_start
+#else
+        .long __irf_end - __irf_start
+#endif
diff --git a/usr/initramfs_data.bz2.S b/usr/initramfs_data.bz2.S
deleted file mode 100644
index bc54d090365c..000000000000
--- a/usr/initramfs_data.bz2.S
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
-  initramfs_data includes the compressed binary that is the
-  filesystem used for early user space.
-  Note: Older versions of "as" (prior to binutils 2.11.90.0.23
-  released on 2001-07-14) dit not support .incbin.
-  If you are forced to use older binutils than that then the
-  following trick can be applied to create the resulting binary:
-
-
-  ld -m elf_i386  --format binary --oformat elf32-i386 -r \
-  -T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o
-   ld -m elf_i386  -r -o built-in.o initramfs_data.o
-
-  initramfs_data.scr looks like this:
-SECTIONS
-{
-       .init.ramfs : { *(.data) }
-}
-
-  The above example is for i386 - the parameters vary from architectures.
-  Eventually look up LDFLAGS_BLOB in an older version of the
-  arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced.
-
-  Using .incbin has the advantage over ld that the correct flags are set
-  in the ELF header, as required by certain architectures.
-*/
-
-.section .init.ramfs,"a"
-.incbin "usr/initramfs_data.cpio.bz2"
diff --git a/usr/initramfs_data.gz.S b/usr/initramfs_data.gz.S
deleted file mode 100644
index 890c8dd1d6bd..000000000000
--- a/usr/initramfs_data.gz.S
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
-  initramfs_data includes the compressed binary that is the
-  filesystem used for early user space.
-  Note: Older versions of "as" (prior to binutils 2.11.90.0.23
-  released on 2001-07-14) dit not support .incbin.
-  If you are forced to use older binutils than that then the
-  following trick can be applied to create the resulting binary:
-
-
-  ld -m elf_i386  --format binary --oformat elf32-i386 -r \
-  -T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o
-   ld -m elf_i386  -r -o built-in.o initramfs_data.o
-
-  initramfs_data.scr looks like this:
-SECTIONS
-{
-       .init.ramfs : { *(.data) }
-}
-
-  The above example is for i386 - the parameters vary from architectures.
-  Eventually look up LDFLAGS_BLOB in an older version of the
-  arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced.
-
-  Using .incbin has the advantage over ld that the correct flags are set
-  in the ELF header, as required by certain architectures.
-*/
-
-.section .init.ramfs,"a"
-.incbin "usr/initramfs_data.cpio.gz"
diff --git a/usr/initramfs_data.lzma.S b/usr/initramfs_data.lzma.S
deleted file mode 100644
index e11469e48562..000000000000
--- a/usr/initramfs_data.lzma.S
+++ /dev/null
@@ -1,29 +0,0 @@
-/*
-  initramfs_data includes the compressed binary that is the
-  filesystem used for early user space.
-  Note: Older versions of "as" (prior to binutils 2.11.90.0.23
-  released on 2001-07-14) dit not support .incbin.
-  If you are forced to use older binutils than that then the
-  following trick can be applied to create the resulting binary:
-
-
-  ld -m elf_i386  --format binary --oformat elf32-i386 -r \
-  -T initramfs_data.scr initramfs_data.cpio.gz -o initramfs_data.o
-   ld -m elf_i386  -r -o built-in.o initramfs_data.o
-
-  initramfs_data.scr looks like this:
-SECTIONS
-{
-       .init.ramfs : { *(.data) }
-}
-
-  The above example is for i386 - the parameters vary from architectures.
-  Eventually look up LDFLAGS_BLOB in an older version of the
-  arch/$(ARCH)/Makefile to see the flags used before .incbin was introduced.
-
-  Using .incbin has the advantage over ld that the correct flags are set
-  in the ELF header, as required by certain architectures.
-*/
-
-.section .init.ramfs,"a"
-.incbin "usr/initramfs_data.cpio.lzma"