| 1 | |
| 2 | |
| 3 | * arch/sh/boot/compressed/misc.c
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| 4 | *
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| 5 | * This is a collection of several routines from gzip-1.0.3
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| 6 | * adapted for Linux.
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| 7 | *
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| 8 | * malloc by Hannu Savolainen 1993 and Matthias Urlichs 1994
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| 9 | *
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| 10 | * Adapted for SH by Stuart Menefy, Aug 1999
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| 11 | *
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| 12 | * Modified to use standard LinuxSH BIOS by Greg Banks 7Jul2000
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| 13 |
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| 14 |
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| 15 | #include <linux/uaccess.h>
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| 16 | #include <asm/addrspace.h>
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| 17 | #include <asm/page.h>
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| 18 |
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| 19 | #include "misc.h"
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| 20 |
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| 21 | |
| 22 | * gzip declarations
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| 23 |
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| 24 |
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| 25 | #define STATIC static
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| 26 |
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| 27 | #undef memset
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| 28 | #undef memcpy
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| 29 | #define memzero(s, n) memset ((s), 0, (n))
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| 30 |
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| 31 | extern char input_data[];
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| 32 | extern int input_len;
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| 33 | static unsigned char *output;
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| 34 |
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| 35 | static void error(char *m);
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| 36 |
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| 37 | int puts(const char *);
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| 38 |
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| 39 | extern int _text;
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| 40 | extern int _end;
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| 41 | static unsigned long free_mem_ptr;
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| 42 | static unsigned long free_mem_end_ptr;
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| 43 |
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| 44 | #ifdef CONFIG_HAVE_KERNEL_BZIP2
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| 45 | #define HEAP_SIZE 0x400000
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| 46 | #else
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| 47 | #define HEAP_SIZE 0x10000
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| 48 | #endif
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| 49 |
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| 50 | #ifdef CONFIG_KERNEL_GZIP
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| 51 | #include "../../../../lib/decompress_inflate.c"
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| 52 | #endif
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| 53 |
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| 54 | #ifdef CONFIG_KERNEL_BZIP2
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| 55 | #include "../../../../lib/decompress_bunzip2.c"
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| 56 | #endif
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| 57 |
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| 58 | #ifdef CONFIG_KERNEL_LZMA
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| 59 | #include "../../../../lib/decompress_unlzma.c"
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| 60 | #endif
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| 61 |
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| 62 | #ifdef CONFIG_KERNEL_XZ
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| 63 | #include "../../../../lib/decompress_unxz.c"
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| 64 | #endif
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| 65 |
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| 66 | #ifdef CONFIG_KERNEL_LZO
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| 67 | #include "../../../../lib/decompress_unlzo.c"
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| 68 | #endif
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| 69 |
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| 70 | int puts(const char *s)
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| 71 | {
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| 72 |
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| 73 | return 0;
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| 74 | }
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| 75 |
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| 76 | void* memset(void* s, int c, size_t n)
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| 77 | {
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| 78 | int i;
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| 79 | char *ss = (char*)s;
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| 80 |
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| 81 | for (i=0;i<n;i++) ss[i] = c;
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| 82 | return s;
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| 83 | }
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| 84 |
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| 85 | void* memcpy(void* __dest, __const void* __src,
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| 86 | size_t __n)
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| 87 | {
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| 88 | int i;
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| 89 | char *d = (char *)__dest, *s = (char *)__src;
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| 90 |
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| 91 | for (i=0;i<__n;i++) d[i] = s[i];
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| 92 | return __dest;
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| 93 | }
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| 94 |
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| 95 | static void error(char *x)
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| 96 | {
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| 97 | puts("\n\n");
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| 98 | puts(x);
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| 99 | puts("\n\n -- System halted");
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| 100 |
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| 101 | while(1);
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| 102 | }
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| 103 |
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| 104 | const unsigned long __stack_chk_guard = 0x000a0dff;
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| 105 |
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| 106 | void __stack_chk_fail(void)
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| 107 | {
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| 108 | error("stack-protector: Kernel stack is corrupted\n");
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| 109 | }
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| 110 |
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| 111 |
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| 112 | void ftrace_stub(void)
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| 113 | {
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| 114 | }
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| 115 | void arch_ftrace_ops_list_func(void)
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| 116 | {
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| 117 | }
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| 118 |
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| 119 | #define stackalign 4
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| 120 |
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| 121 | #define STACK_SIZE (4096)
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| 122 | long __attribute__ ((aligned(stackalign))) user_stack[STACK_SIZE];
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| 123 | long *stack_start = &user_stack[STACK_SIZE];
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| 124 |
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| 125 | void decompress_kernel(void)
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| 126 | {
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| 127 | unsigned long output_addr;
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| 128 |
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| 129 | output_addr = __pa((unsigned long)&_text+PAGE_SIZE);
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| 130 | #if defined(CONFIG_29BIT)
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| 131 | output_addr |= P2SEG;
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| 132 | #endif
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| 133 |
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| 134 | output = (unsigned char *)output_addr;
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| 135 | free_mem_ptr = (unsigned long)&_end;
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| 136 | free_mem_end_ptr = free_mem_ptr + HEAP_SIZE;
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| 137 |
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| 138 | puts("Uncompressing Linux... ");
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| 139 | __decompress(input_data, input_len, NULL, NULL, output, 0, NULL, error);
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| 140 | puts("Ok, booting the kernel.\n");
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| 141 | }
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