| 1 | # Copyright (C) 2014-2018 Free Software Foundation, Inc. |
| 2 | # |
| 3 | # Copying and distribution of this file, with or without modification, |
| 4 | # are permitted in any medium without royalty provided the copyright |
| 5 | # notice and this notice are preserved. |
| 6 | |
| 7 | # Many sections come in three flavours. There is the 'real' section, |
| 8 | # like ".data". Then there are the per-procedure or per-variable |
| 9 | # sections, generated by -ffunction-sections and -fdata-sections in GCC, |
| 10 | # and useful for --gc-sections, which for a variable "foo" might be |
| 11 | # ".data.foo". Then there are the linkonce sections, for which the linker |
| 12 | # eliminates duplicates, which are named like ".gnu.linkonce.d.foo". |
| 13 | # The exact correspondences are: |
| 14 | # |
| 15 | # Section Linkonce section |
| 16 | # .text .gnu.linkonce.t.foo |
| 17 | # .rodata .gnu.linkonce.r.foo |
| 18 | # .data .gnu.linkonce.d.foo |
| 19 | # .bss .gnu.linkonce.b.foo |
| 20 | # .sdata .gnu.linkonce.s.foo |
| 21 | # .sbss .gnu.linkonce.sb.foo |
| 22 | # .sdata2 .gnu.linkonce.s2.foo |
| 23 | # .sbss2 .gnu.linkonce.sb2.foo |
| 24 | # .debug_info .gnu.linkonce.wi.foo |
| 25 | # .tdata .gnu.linkonce.td.foo |
| 26 | # .tbss .gnu.linkonce.tb.foo |
| 27 | # .lrodata .gnu.linkonce.lr.foo |
| 28 | # .ldata .gnu.linkonce.l.foo |
| 29 | # .lbss .gnu.linkonce.lb.foo |
| 30 | # |
| 31 | # Each of these can also have corresponding .rel.* and .rela.* sections. |
| 32 | |
| 33 | test -z "$ENTRY" && ENTRY=__start |
| 34 | cat <<EOF |
| 35 | OUTPUT_FORMAT("${OUTPUT_FORMAT}") |
| 36 | |
| 37 | ENTRY(${ENTRY}) |
| 38 | |
| 39 | /* Start and end of main stack. Assumes 256K of RAM. */ |
| 40 | ${RELOCATING+ _estack = 0xe0040000 - 4;} |
| 41 | ${RELOCATING+ _sstack = 0xe0040000 - 64K;} |
| 42 | |
| 43 | /* End of heap. */ |
| 44 | ${RELOCATING+ _eheap = _sstack - 4;} |
| 45 | |
| 46 | |
| 47 | MEMORY |
| 48 | { |
| 49 | init : ORIGIN = 0x00000000, LENGTH = 0x0003fffc |
| 50 | scr : ORIGIN = 0x0003fffc, LENGTH = 0x00000004 |
| 51 | rom : ORIGIN = 0x00044000, LENGTH = 0x1ffbc000 |
| 52 | ram : ORIGIN = 0xe0000000, LENGTH = 0x10000000 |
| 53 | saferam : ORIGIN = 0xf0000000, LENGTH = 0x10000000 |
| 54 | } |
| 55 | |
| 56 | |
| 57 | SECTIONS |
| 58 | { |
| 59 | .init ${RELOCATING-0} : { |
| 60 | KEEP (*(.init)) |
| 61 | KEEP (*(.fini)) |
| 62 | ${RELOCATING+ _einit = .;} |
| 63 | } ${RELOCATING+ > init} |
| 64 | |
| 65 | .text ${RELOCATING-0} : { |
| 66 | ${RELOCATING+ _ftext = .;} |
| 67 | *(.text) |
| 68 | ${RELOCATING+*(.text.*)} |
| 69 | ${RELOCATING+*(.gnu.linkonce.t.*)} |
| 70 | ${RELOCATING+ _etext = .;} |
| 71 | } ${RELOCATING+ > rom} |
| 72 | |
| 73 | .ctors ${RELOCATING-0} : { |
| 74 | ${CONSTRUCTING+ . = ALIGN(4);} |
| 75 | ${CONSTRUCTING+ __CTOR_LIST__ = .;} |
| 76 | /* gcc uses crtbegin.o to find the start of |
| 77 | the constructors, so we make sure it is |
| 78 | first. Because this is a wildcard, it |
| 79 | doesn't matter if the user does not |
| 80 | actually link against crtbegin.o; the |
| 81 | linker won't look for a file to match a |
| 82 | wildcard. The wildcard also means that it |
| 83 | doesn't matter which directory crtbegin.o |
| 84 | is in. */ |
| 85 | |
| 86 | KEEP (*crtbegin*.o(.ctors)) |
| 87 | |
| 88 | /* We don't want to include the .ctor section from |
| 89 | from the crtend.o file until after the sorted ctors. |
| 90 | The .ctor section from the crtend file contains the |
| 91 | end of ctors marker and it must be last. */ |
| 92 | |
| 93 | KEEP (*(EXCLUDE_FILE (*crtend*.o) .ctors)) |
| 94 | KEEP (*(SORT(.ctors.*))) |
| 95 | KEEP (*(.ctors)) |
| 96 | ${CONSTRUCTING+ __CTOR_END__ = .;} |
| 97 | } ${RELOCATING+ > rom} |
| 98 | |
| 99 | .dtors ${RELOCATING-0} : { |
| 100 | ${CONSTRUCTING+ __DTOR_LIST__ = .;} |
| 101 | KEEP (*crtbegin*.o(.dtors)) |
| 102 | KEEP (*(EXCLUDE_FILE (*crtend*.o) .dtors)) |
| 103 | KEEP (*(SORT(.dtors.*))) |
| 104 | KEEP (*(.dtors)) |
| 105 | ${CONSTRUCTING+ __DTOR_END__ = .;} |
| 106 | } ${RELOCATING+ > rom} |
| 107 | .rodata ${RELOCATING-0} : { |
| 108 | ${RELOCATING+ . = ALIGN(4);} |
| 109 | ${RELOCATING+ _srdata = .;} |
| 110 | *(.rdata) |
| 111 | *(.rodata) |
| 112 | ${RELOCATING+*(.rodata.*)} |
| 113 | ${RELOCATING+*(.gnu.linkonce.r.*)} |
| 114 | ${RELOCATING+ . = ALIGN(4);} |
| 115 | ${RELOCATING+ _erdata = .;} |
| 116 | } ${RELOCATING+ > rom} |
| 117 | |
| 118 | .eh_frame ${RELOCATING-0} : |
| 119 | { |
| 120 | ${RELOCATING+PROVIDE (__eh_frame_begin = .);} |
| 121 | *(.eh_frame) |
| 122 | ${RELOCATING+ LONG (0);} |
| 123 | ${RELOCATING+PROVIDE (__eh_frame_end = .);} |
| 124 | } ${RELOCATING+ > rom} |
| 125 | .gcc_except_table ${RELOCATING-0} : { *(.gcc_except_table) } ${RELOCATING+ > rom} |
| 126 | .jcr ${RELOCATING-0} : { *(.jcr) } ${RELOCATING+ > rom} |
| 127 | |
| 128 | .data ${RELOCATING-0} : { |
| 129 | ${RELOCATING+ . = ALIGN(4);} |
| 130 | ${RELOCATING+ _sdata = .;} |
| 131 | *(.data) |
| 132 | ${RELOCATING+*(.data.*)} |
| 133 | ${RELOCATING+*(.gnu.linkonce.d.*)} |
| 134 | ${RELOCATING+ . = ALIGN(4);} |
| 135 | ${RELOCATING+ _edata = .;} |
| 136 | } ${RELOCATING+ > ram} |
| 137 | .bss ${RELOCATING-0} : { |
| 138 | ${RELOCATING+ . = ALIGN(4);} |
| 139 | ${RELOCATING+ __bss_start = .;} |
| 140 | *(.bss) |
| 141 | ${RELOCATING+*(.bss.*)} |
| 142 | ${RELOCATING+*(.gnu.linkonce.b.*)} |
| 143 | *(COMMON) |
| 144 | ${RELOCATING+ . = ALIGN(4);} |
| 145 | ${RELOCATING+ __bss_end = .;} |
| 146 | ${RELOCATING+ _sheap = .;} |
| 147 | } ${RELOCATING+ > ram} |
| 148 | |
| 149 | saferam ${RELOCATING-0} : { |
| 150 | *(saferam) |
| 151 | ${RELOCATING+ . = ALIGN(4);} |
| 152 | ${RELOCATING+ unitidentry = .;} |
| 153 | } ${RELOCATING+ > saferam} |
| 154 | |
| 155 | /* Stabs debugging sections. */ |
| 156 | .stab 0 : { *(.stab) } |
| 157 | .stabstr 0 : { *(.stabstr) } |
| 158 | .stab.excl 0 : { *(.stab.excl) } |
| 159 | .stab.exclstr 0 : { *(.stab.exclstr) } |
| 160 | .stab.index 0 : { *(.stab.index) } |
| 161 | .stab.indexstr 0 : { *(.stab.indexstr) } |
| 162 | |
| 163 | .comment 0 : { *(.comment) } |
| 164 | |
| 165 | EOF |
| 166 | |
| 167 | . $srcdir/scripttempl/DWARF.sc |
| 168 | |
| 169 | cat <<EOF |
| 170 | } |
| 171 | |
| 172 | /* Provide a default address for the simulated file-I/O device. */ |
| 173 | PROVIDE (_sim_fileio_register = 0x2fff0000); |
| 174 | |
| 175 | /* Provide a default address for the simulated command line device. */ |
| 176 | PROVIDE (_sim_cmdline_header = 0x2ffe0000); |
| 177 | |
| 178 | /* Provide a default address for the simulated 1 MHz clock. */ |
| 179 | PROVIDE (_sim_clock = 0x20002100); |
| 180 | |
| 181 | EOF |