diff options
Diffstat (limited to 'usr')
| -rw-r--r-- | usr/Kconfig | 20 | ||||
| -rw-r--r-- | usr/Makefile | 14 | ||||
| -rw-r--r-- | usr/gen_init_cpio.c | 20 | ||||
| -rw-r--r-- | usr/initramfs_data.S | 22 | ||||
| -rw-r--r-- | usr/initramfs_data.bz2.S | 29 | ||||
| -rw-r--r-- | usr/initramfs_data.gz.S | 29 | ||||
| -rw-r--r-- | usr/initramfs_data.lzma.S | 29 |
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" |
