Linux/scripts/xz

Version: ~ [ linux-6.12-rc7 ] ~ [ linux-6.11.7 ] ~ [ linux-6.10.14 ] ~ [ linux-6.9.12 ] ~ [ linux-6.8.12 ] ~ [ linux-6.7.12 ] ~ [ linux-6.6.60 ] ~ [ linux-6.5.13 ] ~ [ linux-6.4.16 ] ~ [ linux-6.3.13 ] ~ [ linux-6.2.16 ] ~ [ linux-6.1.116 ] ~ [ linux-6.0.19 ] ~ [ linux-5.19.17 ] ~ [ linux-5.18.19 ] ~ [ linux-5.17.15 ] ~ [ linux-5.16.20 ] ~ [ linux-5.15.171 ] ~ [ linux-5.14.21 ] ~ [ linux-5.13.19 ] ~ [ linux-5.12.19 ] ~ [ linux-5.11.22 ] ~ [ linux-5.10.229 ] ~ [ linux-5.9.16 ] ~ [ linux-5.8.18 ] ~ [ linux-5.7.19 ] ~ [ linux-5.6.19 ] ~ [ linux-5.5.19 ] ~ [ linux-5.4.285 ] ~ [ linux-5.3.18 ] ~ [ linux-5.2.21 ] ~ [ linux-5.1.21 ] ~ [ linux-5.0.21 ] ~ [ linux-4.20.17 ] ~ [ linux-4.19.323 ] ~ [ linux-4.18.20 ] ~ [ linux-4.17.19 ] ~ [ linux-4.16.18 ] ~ [ linux-4.15.18 ] ~ [ linux-4.14.336 ] ~ [ linux-4.13.16 ] ~ [ linux-4.12.14 ] ~ [ linux-4.11.12 ] ~ [ linux-4.10.17 ] ~ [ linux-4.9.337 ] ~ [ linux-4.4.302 ] ~ [ linux-3.10.108 ] ~ [ linux-2.6.32.71 ] ~ [ linux-2.6.0 ] ~ [ linux-2.4.37.11 ] ~ [ unix-v6-master ] ~ [ ccs-tools-1.8.12 ] ~ [ policy-sample ] ~
Architecture: ~ [ i386 ] ~ [ alpha ] ~ [ m68k ] ~ [ mips ] ~ [ ppc ] ~ [ sparc ] ~ [ sparc64 ] ~

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1 #!/bin/sh 1 #!/bin/sh 2 # SPDX-License-Identifier: 0BSD << 3 # 2 # 4 # This is a wrapper for xz to compress the ker 3 # This is a wrapper for xz to compress the kernel image using appropriate 5 # compression options depending on the archite 4 # compression options depending on the architecture. 6 # 5 # 7 # Author: Lasse Collin <lasse.collin@tukaani.or 6 # Author: Lasse Collin <lasse.collin@tukaani.org> 8 << 9 # This has specialized settings for the follow << 10 # XZ-compressed kernel isn't currently support << 11 # 7 # 12 # Arch Align Notes !! 8 # This file has been put into the public domain. 13 # arm 2/4 ARM and ARM-Thumb2 !! 9 # You can do whatever you want with this file. 14 # arm64 4 !! 10 # 15 # csky 2 << 16 # loongarch 4 << 17 # mips 2/4 MicroMIPS is 2-byte al << 18 # parisc 4 << 19 # powerpc 4 Uses its own wrapper f << 20 # riscv 2/4 << 21 # s390 2 << 22 # sh 2 << 23 # sparc 4 << 24 # x86 1 << 25 << 26 # A few archs use 2-byte or 4-byte aligned ins << 27 # the kernel config. This function is used to << 28 # config option is set to "y". << 29 is_enabled() << 30 { << 31 grep -q "^$1=y$" include/config/auto.c << 32 } << 33 << 34 # XZ_VERSION is needed to disable features tha << 35 # old XZ Utils versions. << 36 XZ_VERSION=$($XZ --robot --version) || exit << 37 XZ_VERSION=$(printf '%s\n' "$XZ_VERSION" | sed << 38 11 39 # Assume that no BCJ filter is available. << 40 BCJ= 12 BCJ= >> 13 LZMA2OPTS= 41 14 42 # Set the instruction alignment to 1, 2, or 4 << 43 # << 44 # Set the BCJ filter if one is available. << 45 # It must match the #ifdef usage in lib/decomp << 46 case $SRCARCH in 15 case $SRCARCH in 47 arm) !! 16 x86) BCJ=--x86 ;; 48 if is_enabled CONFIG_THUMB2_KE !! 17 powerpc) BCJ=--powerpc ;; 49 ALIGN=2 !! 18 ia64) BCJ=--ia64; LZMA2OPTS=pb=4 ;; 50 BCJ=--armthumb !! 19 arm) BCJ=--arm ;; 51 else !! 20 sparc) BCJ=--sparc ;; 52 ALIGN=4 << 53 BCJ=--arm << 54 fi << 55 ;; << 56 << 57 arm64) << 58 ALIGN=4 << 59 << 60 # ARM64 filter was added in XZ << 61 if [ "$XZ_VERSION" -ge 5004000 << 62 BCJ=--arm64 << 63 else << 64 echo "$0: Upgrading to << 65 "would enable << 66 "for better co << 67 fi << 68 ;; << 69 << 70 csky) << 71 ALIGN=2 << 72 ;; << 73 << 74 loongarch) << 75 ALIGN=4 << 76 ;; << 77 << 78 mips) << 79 if is_enabled CONFIG_CPU_MICRO << 80 ALIGN=2 << 81 else << 82 ALIGN=4 << 83 fi << 84 ;; << 85 << 86 parisc) << 87 ALIGN=4 << 88 ;; << 89 << 90 powerpc) << 91 ALIGN=4 << 92 << 93 # The filter is only for big e << 94 if is_enabled CONFIG_CPU_BIG_E << 95 BCJ=--powerpc << 96 fi << 97 ;; << 98 << 99 riscv) << 100 if is_enabled CONFIG_RISCV_ISA << 101 ALIGN=2 << 102 else << 103 ALIGN=4 << 104 fi << 105 << 106 # RISC-V filter was added in X << 107 if [ "$XZ_VERSION" -ge 5006000 << 108 BCJ=--riscv << 109 else << 110 echo "$0: Upgrading to << 111 "would enable << 112 "for better co << 113 fi << 114 ;; << 115 << 116 s390) << 117 ALIGN=2 << 118 ;; << 119 << 120 sh) << 121 ALIGN=2 << 122 ;; << 123 << 124 sparc) << 125 ALIGN=4 << 126 BCJ=--sparc << 127 ;; << 128 << 129 x86) << 130 ALIGN=1 << 131 BCJ=--x86 << 132 ;; << 133 << 134 *) << 135 echo "$0: Arch-specific tuning << 136 << 137 # Guess 2-byte-aligned instruc << 138 # should hurt less than guessi << 139 ALIGN=2 << 140 ;; << 141 esac << 142 << 143 # Select the LZMA2 options matching the instru << 144 case $ALIGN in << 145 1) LZMA2OPTS= ;; << 146 2) LZMA2OPTS=lp=1 ;; << 147 4) LZMA2OPTS=lp=2,lc=2 ;; << 148 *) echo "$0: ALIGN wrong or missing" << 149 esac 21 esac 150 22 151 # Use single-threaded mode because it compress !! 23 exec xz --check=crc32 $BCJ --lzma2=$LZMA2OPTS,dict=32MiB 152 # (and uses less RAM) than multithreaded mode. << 153 # << 154 # For the best compression, the dictionary siz << 155 # smaller than the uncompressed kernel. 128 Mi << 156 # needs less than 1400 MiB of RAM in single-th << 157 # << 158 # On the archs that use this script to compres << 159 # decompression in the preboot code is done in << 160 # Thus the dictionary size doesn't affect the << 161 # of the preboot decompressor at all. << 162 exec $XZ --check=crc32 --threads=1 $BCJ --lzma <<

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TOMOYO Linux Cross Reference
Linux/scripts/xz_wrap.sh

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Differences between /scripts/xz_wrap.sh (Version linux-6.12-rc7) and /scripts/xz_wrap.sh (Version linux-5.6.19)

TOMOYO Linux Cross Reference Linux/scripts/xz_wrap.sh

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Differences between /scripts/xz_wrap.sh (Version linux-6.12-rc7) and /scripts/xz_wrap.sh (Version linux-5.6.19)

TOMOYO Linux Cross Reference
Linux/scripts/xz_wrap.sh