[444] | 1 | /* |
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| 2 | *uncomment this if you want the linker to output srecords. |
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| 3 | OUTPUT_FORMAT(srec) |
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| 4 | * |
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| 5 | */ |
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| 6 | ENTRY(_start) |
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| 7 | STARTUP(crt0.o) |
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| 8 | OUTPUT_ARCH(sparc) |
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| 9 | SEARCH_DIR(.) |
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| 10 | __DYNAMIC = 0; |
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| 11 | GROUP (-lc -lslite934 -lgcc) |
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| 12 | |
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| 13 | /* |
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| 14 | * The memory map looks like this: |
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| 15 | * +--------------------+ <- low memory |
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| 16 | * | .text | |
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| 17 | * | _stext | |
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| 18 | * | _etext | |
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| 19 | * | ctor list | the ctor and dtor lists are for |
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| 20 | * | dtor list | C++ support |
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| 21 | * | _end_text | |
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| 22 | * +--------------------+ |
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| 23 | * | .data | initialized data goes here |
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| 24 | * | _sdata | |
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| 25 | * | _edata | |
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| 26 | * +--------------------+ |
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| 27 | * | .bss | |
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| 28 | * | __bss_start | start of bss, cleared by crt0 |
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| 29 | * | _end | start of heap, used by sbrk() |
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| 30 | * +--------------------+ |
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| 31 | * | heap space | |
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| 32 | * | _ENDHEAP | |
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| 33 | * | stack space | |
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| 34 | * | __stack | top of stack |
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| 35 | * +--------------------+ <- high memory |
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| 36 | */ |
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| 37 | |
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| 38 | _STACK_SIZE = (16 * 1024); |
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| 39 | _RAM_SIZE = 2M; |
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| 40 | _RAM_START = 0x40010000; |
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| 41 | _RAM_END = _RAM_START + _RAM_SIZE; |
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| 42 | |
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| 43 | /* |
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| 44 | * Base address of the on-CPU peripherals. This is for compatability |
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| 45 | * with the simulator. |
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| 46 | */ |
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| 47 | |
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| 48 | _ERC32_MEC = 0x0; |
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| 49 | |
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| 50 | /* |
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| 51 | * Setup the memory map of the MB86931-EB Board (ex931) |
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| 52 | * stack grows down towards low memory. |
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| 53 | */ |
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| 54 | MEMORY |
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| 55 | { |
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| 56 | ram (rwx) : ORIGIN = 0x40010000, LENGTH = 2M |
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| 57 | } |
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| 58 | |
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| 59 | __stack = _RAM_START + _RAM_SIZE - 4 * 16; |
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| 60 | __trap_stack = (_RAM_START + _RAM_SIZE - 4 * 16) - _STACK_SIZE; |
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| 61 | |
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| 62 | /* |
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| 63 | * All the symbols that might be accessed from C code need to be |
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| 64 | * listed twice, once with an additional underscore. aout format needs |
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| 65 | * and extra underscore, whereas coff & elf doesn't. This is to work |
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| 66 | * with both. |
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| 67 | */ |
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| 68 | /* |
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| 69 | * Initalize some symbols to be zero so we can reference them in the |
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| 70 | * crt0 without core dumping. These functions are all optional, but |
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| 71 | * we do this so we can have our crt0 always use them if they exist. |
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| 72 | * This is so BSPs work better when using the crt0 installed with gcc. |
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| 73 | * We have to initalize them twice, so we cover a.out (which prepends |
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| 74 | * an underscore) and coff object file formats. |
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| 75 | */ |
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| 76 | PROVIDE (hardware_init_hook = 0); |
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| 77 | PROVIDE (_hardware_init_hook = 0); |
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| 78 | PROVIDE (software_init_hook = 0); |
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| 79 | PROVIDE (_software_init_hook = 0); |
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| 80 | SECTIONS |
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| 81 | { |
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| 82 | .text : { |
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| 83 | stext = .; |
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| 84 | _stext = .; |
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| 85 | CREATE_OBJECT_SYMBOLS |
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| 86 | *(.text) |
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| 87 | __CTOR_LIST__ = .; |
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| 88 | LONG((__CTOR_END__ - __CTOR_LIST__) / 4 - 2) |
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| 89 | *(.ctors) |
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| 90 | LONG(0) |
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| 91 | __CTOR_END__ = .; |
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| 92 | __DTOR_LIST__ = .; |
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| 93 | LONG((__DTOR_END__ - __DTOR_LIST__) / 4 - 2) |
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| 94 | *(.dtors) |
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| 95 | LONG(0) |
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| 96 | __DTOR_END__ = .; |
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| 97 | _etext = .; |
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| 98 | *(.lit) |
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| 99 | *(.shdata) |
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| 100 | } > ram |
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| 101 | .shbss SIZEOF(.text) + ADDR(.text) : { |
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| 102 | *(.shbss) |
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| 103 | } |
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| 104 | .talias : { } > ram |
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| 105 | .data : { |
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| 106 | sdata = .; |
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| 107 | _sdata = .; |
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| 108 | *(.data) |
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| 109 | edata = .; |
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| 110 | _edata = .; |
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| 111 | } > ram |
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| 112 | .bss SIZEOF(.data) + ADDR(.data) : { |
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| 113 | sbss = . ; |
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| 114 | _sbss = . ; |
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| 115 | __bss_start = ALIGN(0x8); |
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| 116 | __bss_start = ALIGN(0x8); |
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| 117 | *(.bss) |
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| 118 | *(COMMON) |
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| 119 | end = ALIGN(0x8); |
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| 120 | _end = ALIGN(0x8); |
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| 121 | __end = ALIGN(0x8); |
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| 122 | ebss = .; |
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| 123 | _ebss = .; |
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| 124 | } |
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| 125 | .mstack : { } > ram |
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| 126 | .rstack : { } > ram |
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| 127 | .stab 0 (NOLOAD) : { |
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| 128 | [ .stab ] |
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| 129 | } |
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| 130 | .stabstr 0 (NOLOAD) : |
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| 131 | { |
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| 132 | [ .stabstr ] |
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| 133 | } |
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| 134 | /* DWARF debug sections. |
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| 135 | Symbols in the DWARF debugging sections are relative to the beginning |
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| 136 | of the section so we begin them at 0. */ |
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| 137 | /* DWARF 1 */ |
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| 138 | .debug 0 : { *(.debug) } |
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| 139 | .line 0 : { *(.line) } |
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| 140 | /* GNU DWARF 1 extensions */ |
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| 141 | .debug_srcinfo 0 : { *(.debug_srcinfo) } |
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| 142 | .debug_sfnames 0 : { *(.debug_sfnames) } |
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| 143 | /* DWARF 1.1 and DWARF 2 */ |
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| 144 | .debug_aranges 0 : { *(.debug_aranges) } |
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| 145 | .debug_pubnames 0 : { *(.debug_pubnames) } |
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| 146 | /* DWARF 2 */ |
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| 147 | .debug_info 0 : { *(.debug_info) } |
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| 148 | .debug_abbrev 0 : { *(.debug_abbrev) } |
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| 149 | .debug_line 0 : { *(.debug_line) } |
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| 150 | .debug_frame 0 : { *(.debug_frame) } |
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| 151 | .debug_str 0 : { *(.debug_str) } |
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| 152 | .debug_loc 0 : { *(.debug_loc) } |
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| 153 | .debug_macinfo 0 : { *(.debug_macinfo) } |
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| 154 | .debug_ranges 0 : { *(.debug_ranges) } |
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| 155 | /* SGI/MIPS DWARF 2 extensions */ |
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| 156 | .debug_weaknames 0 : { *(.debug_weaknames) } |
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| 157 | .debug_funcnames 0 : { *(.debug_funcnames) } |
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| 158 | .debug_typenames 0 : { *(.debug_typenames) } |
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| 159 | .debug_varnames 0 : { *(.debug_varnames) } |
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| 160 | /* These must appear regardless of . */ |
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| 161 | } |
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