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At present, arch/powerpc/boot/main.c includes a gunzip() function which is a convenient wrapper around zlib. However, it doesn't conveniently allow decompressing part of an image to one location, then the remainder to a different address. This patch adds a new set of more flexible convenience wrappers around zlib, moving them to their own file, gunzip_util.c, in the process. These wrappers allow decompressing sections of the compressed image to different locations. In addition, they transparently handle uncompressed data, avoiding special case code to handle uncompressed vmlinux images. The patch also converts main.c to use the new wrappers, using the new flexibility to avoid decompressing the vmlinux's ELF header twice as we did previously. That in turn means we avoid extending our allocations for the vmlinux to allow space for the extra copy of the ELF header. Signed-off-by: David Gibson <dwg@au1.ibm.com> Signed-off-by: Paul Mackerras <paulus@samba.org> |
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| .. | ||
| dts | ||
| .gitignore | ||
| addnote.c | ||
| addRamDisk.c | ||
| crt0.S | ||
| div64.S | ||
| dummy.c | ||
| elf.h | ||
| flatdevtree_env.h | ||
| flatdevtree_misc.c | ||
| flatdevtree.c | ||
| flatdevtree.h | ||
| gunzip_util.c | ||
| gunzip_util.h | ||
| hack-coff.c | ||
| install.sh | ||
| io.h | ||
| main.c | ||
| Makefile | ||
| mktree.c | ||
| ns16550.c | ||
| of.c | ||
| ops.h | ||
| page.h | ||
| ppc_asm.h | ||
| README | ||
| rs6000.h | ||
| serial.c | ||
| simple_alloc.c | ||
| stdio.c | ||
| stdio.h | ||
| string.h | ||
| string.S | ||
| types.h | ||
| util.S | ||
| wrapper | ||
| zImage.coff.lds.S | ||
| zImage.lds.S | ||
To extract the kernel vmlinux, System.map, .config or initrd from the zImage binary: objcopy -j .kernel:vmlinux -O binary zImage vmlinux.gz objcopy -j .kernel:System.map -O binary zImage System.map.gz objcopy -j .kernel:.config -O binary zImage config.gz objcopy -j .kernel:initrd -O binary zImage.initrd initrd.gz Peter