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annotate samples/fonts/lnkscript @ 12:a6ddf338a111

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author John Tsiombikas <nuclear@member.fsf.org>
date Mon, 01 Feb 2016 04:41:27 +0200
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nuclear@0 1 /* Linker Script v1.3 by Jeff Frohwein */
nuclear@0 2 /* v1.0 - Original release */
nuclear@0 3 /* v1.1 - Added proper .data section support */
nuclear@0 4 /* v1.2 - Added support for c++ & iwram overlays */
nuclear@0 5 /* - Major contributions by Jason Wilkins. */
nuclear@0 6 /* v1.3 - .ewram section now can be used when */
nuclear@0 7 /* compiling for MULTIBOOT mode. This fixes */
nuclear@0 8 /* malloc() in DevKitAdvance which depends */
nuclear@0 9 /* on __eheap_start instead of end to define*/
nuclear@0 10 /* the starting location of heap space. */
nuclear@0 11 /* External global variable __gba_iwram_heap*/
nuclear@0 12 /* support added to allow labels end, _end, */
nuclear@0 13 /* & __end__ to point to end of iwram or */
nuclear@0 14 /* the end of ewram. */
nuclear@0 15
nuclear@0 16 /* This file is released into the public domain */
nuclear@0 17 /* for commercial or non-commercial use with no */
nuclear@0 18 /* restrictions placed upon it. */
nuclear@0 19
nuclear@0 20 /* NOTE!!!: This linker script defines the RAM & */
nuclear@0 21 /* ROM start addresses. In order for it to work */
nuclear@0 22 /* properly, remove -Ttext and -Tbss linker */
nuclear@0 23 /* options from your makefile if they are */
nuclear@0 24 /* present. */
nuclear@0 25
nuclear@0 26 /* You can use the following to view section */
nuclear@0 27 /* addresses in your .elf file: */
nuclear@0 28 /* objdump -h file.elf */
nuclear@0 29 /* Please note that empty sections may incorrectly*/
nuclear@0 30 /* list the lma address as the vma address for */
nuclear@0 31 /* some versions of objdump. */
nuclear@0 32
nuclear@0 33 OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
nuclear@0 34 OUTPUT_ARCH(arm)
nuclear@0 35 ENTRY(_start)
nuclear@0 36 /* SEARCH_DIR(/bin/arm); */
nuclear@0 37
nuclear@0 38 /* By default this linker script will generate code */
nuclear@0 39 /* for flash carts located at 0x8000000. In order to */
nuclear@0 40 /* generate code that is compiled at 0x2000000 that */
nuclear@0 41 /* will run on flash carts or in multiboot mode then */
nuclear@0 42 /* you need to add the following variable to your main */
nuclear@0 43 /* project file. It's value is NOT important but */
nuclear@0 44 /* IT MUST BE A GLOBAL VARIABLE OR IT WILL NOT WORK: */
nuclear@0 45
nuclear@0 46 /* #define MULTIBOOT int __gba_multiboot; */
nuclear@0 47 /* Then use it like this: MULTIBOOT */
nuclear@0 48
nuclear@0 49 /* By default this linker script will set the labels */
nuclear@0 50 /* end, _end, & __end__ at the end of ewram. To force */
nuclear@0 51 /* them to be set to the end of iwram then you need to */
nuclear@0 52 /* add the following variable to your main */
nuclear@0 53 /* project file. It's value is NOT important but */
nuclear@0 54 /* IT MUST BE A GLOBAL VARIABLE OR IT WILL NOT WORK: */
nuclear@0 55
nuclear@0 56 /* #define IWRAMHEAP int __gba_iwram_heap; */
nuclear@0 57 /* Then use it like this: IWRAMHEAP */
nuclear@0 58
nuclear@0 59 /* The linker script function "var1 += var2;" sometimes */
nuclear@0 60 /* reports incorrect values in the *.map file but the */
nuclear@0 61 /* actual value it calculates is usually, if not always, */
nuclear@0 62 /* correct. If you leave out the ". = ALIGN(4);" at the */
nuclear@0 63 /* end of each section then the return value of SIZEOF() */
nuclear@0 64 /* is sometimes incorrect and "var1 += var2;" appears to */
nuclear@0 65 /* not work as well. "var1 += var2" style functions are */
nuclear@0 66 /* avoided below as a result. */
nuclear@0 67
nuclear@0 68 /* The linker script MEMORY directive is not used here due */
nuclear@0 69 /* to the fact that __text_start is not always a fixed value. */
nuclear@0 70
nuclear@0 71 __text_start = DEFINED (__gba_multiboot) ? 0x2000000 : 0x8000000;
nuclear@0 72 /* __ewram_start = 0x2000000; */ /* Removed in v1.3 */
nuclear@0 73 __eheap_end = 0x2040000;
nuclear@0 74 __iwram_start = 0x3000000;
nuclear@0 75 __iheap_end = 0x3008000 - 0x400;
nuclear@0 76 __sp_usr = 0x3008000 - 0x100;
nuclear@0 77 __sp_irq = 0x3008000 - 0x60;
nuclear@0 78 __intr_vector_buf = 0x3008000 - 4;
nuclear@0 79 __sp_usr_offset = __sp_usr - __iwram_start;
nuclear@0 80 __intr_vect_offset = __intr_vector_buf - __sp_usr;
nuclear@0 81
nuclear@0 82 SECTIONS
nuclear@0 83 {
nuclear@0 84 .text __text_start : /* ALIGN (4): */
nuclear@0 85 {
nuclear@0 86 *(EXCLUDE_FILE (*text.iwram*) .text)
nuclear@0 87 *(.text.*)
nuclear@0 88 *(.stub)
nuclear@0 89 /* .gnu.warning sections are handled specially by elf32.em. */
nuclear@0 90 *(.gnu.warning)
nuclear@0 91 *(.gnu.linkonce.t*)
nuclear@0 92 *(.glue_7)
nuclear@0 93 *(.glue_7t)
nuclear@0 94 . = ALIGN(4); /* REQUIRED. LD is flaky without it. */
nuclear@0 95 } = 0xff
nuclear@0 96 /* laddr = ADDR(.text) + SIZEOF(.text); */
nuclear@0 97 __text_end = .;
nuclear@0 98
nuclear@0 99 .rodata :
nuclear@0 100 {
nuclear@0 101 *(.rodata)
nuclear@0 102 *all.rodata*(*)
nuclear@0 103 *(.roda)
nuclear@0 104 *(.rodata.*)
nuclear@0 105 *(.gnu.linkonce.r*)
nuclear@0 106 SORT(CONSTRUCTORS)
nuclear@0 107 . = ALIGN(4); /* REQUIRED. LD is flaky without it. */
nuclear@0 108 } = 0xff
nuclear@0 109 /* laddr += SIZEOF(.rodata); */
nuclear@0 110
nuclear@0 111 .ctors :
nuclear@0 112 {
nuclear@0 113 /* gcc uses crtbegin.o to find the start of the constructors, so
nuclear@0 114 we make sure it is first. Because this is a wildcard, it
nuclear@0 115 doesn't matter if the user does not actually link against
nuclear@0 116 crtbegin.o; the linker won't look for a file to match a
nuclear@0 117 wildcard. The wildcard also means that it doesn't matter which
nuclear@0 118 directory crtbegin.o is in. */
nuclear@0 119 KEEP (*crtbegin.o(.ctors))
nuclear@0 120 KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
nuclear@0 121 KEEP (*(SORT(.ctors.*)))
nuclear@0 122 KEEP (*(.ctors))
nuclear@0 123 . = ALIGN(4); /* REQUIRED. LD is flaky without it. */
nuclear@0 124 } = 0
nuclear@0 125 /* laddr += SIZEOF(.ctors); */
nuclear@0 126 laddr = ADDR(.text) + SIZEOF(.text) + SIZEOF(.rodata) + SIZEOF(.ctors);
nuclear@0 127
nuclear@0 128 .dtors :
nuclear@0 129 {
nuclear@0 130 KEEP (*crtbegin.o(.dtors))
nuclear@0 131 KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
nuclear@0 132 KEEP (*(SORT(.dtors.*)))
nuclear@0 133 KEEP (*(.dtors))
nuclear@0 134 . = ALIGN(4); /* REQUIRED. LD is flaky without it. */
nuclear@0 135 } = 0
nuclear@0 136 /* laddr += SIZEOF(.dtors); */
nuclear@0 137 laddr = ADDR(.text) + SIZEOF(.text) + SIZEOF(.rodata) + SIZEOF(.ctors) + SIZEOF(.dtors);
nuclear@0 138
nuclear@0 139 .eh_frame :
nuclear@0 140 {
nuclear@0 141 KEEP (*(.eh_frame))
nuclear@0 142 . = ALIGN(4); /* REQUIRED. LD is flaky without it. */
nuclear@0 143 } = 0
nuclear@0 144 /* laddr += SIZEOF(.eh_frame); */
nuclear@0 145
nuclear@0 146 .gcc_except_table :
nuclear@0 147 {
nuclear@0 148 *(.gcc_except_table)
nuclear@0 149 . = ALIGN(4); /* REQUIRED. LD is flaky without it. */
nuclear@0 150 } = 0
nuclear@0 151 /* laddr += (SIZEOF(.gcc_except_table) + 3) & ~ 3; */
nuclear@0 152 /* __iwram_lma = laddr; */
nuclear@0 153 __iwram_lma = (ADDR(.text) + SIZEOF(.text) + SIZEOF(.rodata) + SIZEOF(.ctors) + SIZEOF(.dtors) + SIZEOF(.eh_frame) + SIZEOF(.gcc_except_table) + 3) & ~ 3;
nuclear@0 154
nuclear@0 155 .iwram __iwram_start : AT (__iwram_lma)
nuclear@0 156 {
nuclear@0 157 __iwram_start = ABSOLUTE(.) ;
nuclear@0 158 *(.iwram)
nuclear@0 159 *iwram.*(.text)
nuclear@0 160 . = ALIGN(4); /* REQUIRED. LD is flaky without it. */
nuclear@0 161 } = 0xff
nuclear@0 162 /* laddr += SIZEOF(.iwram); */
nuclear@0 163 /* __data_lma = laddr; */
nuclear@0 164 __data_lma = ADDR(.text) + SIZEOF(.text) + SIZEOF(.rodata) + SIZEOF(.ctors) + SIZEOF(.dtors) + SIZEOF(.eh_frame) + SIZEOF(.gcc_except_table) + SIZEOF(.iwram);
nuclear@0 165
nuclear@0 166 __iwram_end = . ;
nuclear@0 167
nuclear@0 168 .bss ALIGN(4) :
nuclear@0 169 {
nuclear@0 170 __bss_start = ABSOLUTE(.);
nuclear@0 171 __bss_start__ = ABSOLUTE(.);
nuclear@0 172 *(.dynbss)
nuclear@0 173 *(.gnu.linkonce.b*)
nuclear@0 174 *(COMMON)
nuclear@0 175 . = ALIGN(4); /* REQUIRED. LD is flaky without it. */
nuclear@0 176 }
nuclear@0 177
nuclear@0 178 __bss_end = . ;
nuclear@0 179 __bss_end__ = . ;
nuclear@0 180
nuclear@0 181 .data ALIGN(4) : AT (__data_lma)
nuclear@0 182 {
nuclear@0 183 __data_start = ABSOLUTE(.);
nuclear@0 184 *(.data)
nuclear@0 185 *(.data.*)
nuclear@0 186 *(.gnu.linkonce.d*)
nuclear@0 187 CONSTRUCTORS
nuclear@0 188 . = ALIGN(4); /* REQUIRED. LD is flaky without it. */
nuclear@0 189 } = 0xff
nuclear@0 190 /* laddr += SIZEOF(.data); */
nuclear@0 191 /* __iwram_overlay_lma = laddr; */
nuclear@0 192 __iwram_overlay_lma = ADDR(.text) + SIZEOF(.text) + SIZEOF(.rodata) + SIZEOF(.ctors) + SIZEOF(.dtors) + SIZEOF(.eh_frame) + SIZEOF(.gcc_except_table) + SIZEOF(.iwram) + SIZEOF(.data);
nuclear@0 193
nuclear@0 194 __data_end = .;
nuclear@0 195 PROVIDE (edata = .);
nuclear@0 196 /* __data_lma = LOADADDR(.data); */
nuclear@0 197 __iwram_overlay_start = . ;
nuclear@0 198
nuclear@0 199 OVERLAY : NOCROSSREFS AT (__iwram_overlay_lma)
nuclear@0 200 {
nuclear@0 201 .iwram0 { *(.iwram0) . = ALIGN(4);}
nuclear@0 202 .iwram1 { *(.iwram1) . = ALIGN(4);}
nuclear@0 203 .iwram2 { *(.iwram2) . = ALIGN(4);}
nuclear@0 204 .iwram3 { *(.iwram3) . = ALIGN(4);}
nuclear@0 205 .iwram4 { *(.iwram4) . = ALIGN(4);}
nuclear@0 206 .iwram5 { *(.iwram5) . = ALIGN(4);}
nuclear@0 207 .iwram6 { *(.iwram6) . = ALIGN(4);}
nuclear@0 208 .iwram7 { *(.iwram7) . = ALIGN(4);}
nuclear@0 209 .iwram8 { *(.iwram8) . = ALIGN(4);}
nuclear@0 210 .iwram9 { *(.iwram9) . = ALIGN(4);}
nuclear@0 211 } = 0xff
nuclear@0 212 /* laddr += (SIZEOF(.iwram0)+SIZEOF(.iwram1)+SIZEOF(.iwram2)+SIZEOF(.iwram3)+SIZEOF(.iwram4)+SIZEOF(.iwram5)+SIZEOF(.iwram6)+SIZEOF(.iwram7)+SIZEOF(.iwram8)+SIZEOF(.iwram9)); */
nuclear@0 213 /* __ewram_lma = laddr; */
nuclear@0 214 __ewram_lma = ADDR(.text) + SIZEOF(.text) + SIZEOF(.rodata) + SIZEOF(.ctors) + SIZEOF(.dtors) + SIZEOF(.eh_frame) + SIZEOF(.gcc_except_table) + SIZEOF(.iwram) + SIZEOF(.data) + SIZEOF(.iwram0)+SIZEOF(.iwram1)+SIZEOF(.iwram2)+SIZEOF(.iwram3)+SIZEOF(.iwram4)+SIZEOF(.iwram5)+SIZEOF(.iwram6)+SIZEOF(.iwram7)+SIZEOF(.iwram8)+SIZEOF(.iwram9);
nuclear@0 215
nuclear@0 216 /* __iwram_overlay_lma = LOADADDR (.iwram0); */
nuclear@0 217 __iwram_overlay_end = . ;
nuclear@0 218 /* _end = . ; */
nuclear@0 219 /* __end__ = . ; */
nuclear@0 220 /* PROVIDE (end = .); */
nuclear@0 221 __iheap_start = . ;
nuclear@0 222
nuclear@0 223 /* v1.3 */
nuclear@0 224 __ewram_start = DEFINED (__gba_multiboot) ? __ewram_lma : 0x2000000;
nuclear@0 225
nuclear@0 226 .ewram __ewram_start : AT (__ewram_lma)
nuclear@0 227 {
nuclear@0 228 /* __ewram_start = ABSOLUTE(.); */
nuclear@0 229 *(.ewram)
nuclear@0 230 . = ALIGN(4); /* REQUIRED. LD is flaky without it. */
nuclear@0 231 } = 0xff
nuclear@0 232 /* laddr += SIZEOF(.ewram); */
nuclear@0 233 /* __ewram_overlay_lma = laddr; */
nuclear@0 234 __ewram_overlay_lma = ADDR(.text) + SIZEOF(.text) + SIZEOF(.rodata) + SIZEOF(.ctors) + SIZEOF(.dtors) + SIZEOF(.eh_frame) + SIZEOF(.gcc_except_table) + SIZEOF(.iwram) + SIZEOF(.data) + SIZEOF(.iwram0)+SIZEOF(.iwram1)+SIZEOF(.iwram2)+SIZEOF(.iwram3)+SIZEOF(.iwram4)+SIZEOF(.iwram5)+SIZEOF(.iwram6)+SIZEOF(.iwram7)+SIZEOF(.iwram8)+SIZEOF(.iwram9) + SIZEOF(.ewram);
nuclear@0 235
nuclear@0 236 /* __ewram_lma = LOADADDR(.ewram); */
nuclear@0 237 __ewram_end = . ;
nuclear@0 238 __ewram_overlay_start = . ;
nuclear@0 239
nuclear@0 240 OVERLAY ALIGN(4): NOCROSSREFS AT (__ewram_overlay_lma)
nuclear@0 241 {
nuclear@0 242 .ewram0 { *(.ewram0) . = ALIGN(4);}
nuclear@0 243 .ewram1 { *(.ewram1) . = ALIGN(4);}
nuclear@0 244 .ewram2 { *(.ewram2) . = ALIGN(4);}
nuclear@0 245 .ewram3 { *(.ewram3) . = ALIGN(4);}
nuclear@0 246 .ewram4 { *(.ewram4) . = ALIGN(4);}
nuclear@0 247 .ewram5 { *(.ewram5) . = ALIGN(4);}
nuclear@0 248 .ewram6 { *(.ewram6) . = ALIGN(4);}
nuclear@0 249 .ewram7 { *(.ewram7) . = ALIGN(4);}
nuclear@0 250 .ewram8 { *(.ewram8) . = ALIGN(4);}
nuclear@0 251 .ewram9 { *(.ewram9) . = ALIGN(4);}
nuclear@0 252 } = 0xff
nuclear@0 253
nuclear@0 254 __ewram_overlay_end = . ;
nuclear@0 255
nuclear@0 256 __eheap_start = . ;
nuclear@0 257
nuclear@0 258 _end = DEFINED (__gba_iwram_heap) ? __iheap_start : .; /* v1.3 */
nuclear@0 259 __end__ = _end ; /* v1.3 */
nuclear@0 260 PROVIDE (end = _end); /* v1.3 */
nuclear@0 261
nuclear@0 262 /* Stabs debugging sections. */
nuclear@0 263 .stab 0 : { *(.stab) }
nuclear@0 264 .stabstr 0 : { *(.stabstr) }
nuclear@0 265 .stab.excl 0 : { *(.stab.excl) }
nuclear@0 266 .stab.exclstr 0 : { *(.stab.exclstr) }
nuclear@0 267 .stab.index 0 : { *(.stab.index) }
nuclear@0 268 .stab.indexstr 0 : { *(.stab.indexstr) }
nuclear@0 269 .comment 0 : { *(.comment) }
nuclear@0 270 /* DWARF debug sections.
nuclear@0 271 Symbols in the DWARF debugging sections are relative to the beginning
nuclear@0 272 of the section so we begin them at 0. */
nuclear@0 273 /* DWARF 1 */
nuclear@0 274 .debug 0 : { *(.debug) }
nuclear@0 275 .line 0 : { *(.line) }
nuclear@0 276 /* GNU DWARF 1 extensions */
nuclear@0 277 .debug_srcinfo 0 : { *(.debug_srcinfo) }
nuclear@0 278 .debug_sfnames 0 : { *(.debug_sfnames) }
nuclear@0 279 /* DWARF 1.1 and DWARF 2 */
nuclear@0 280 .debug_aranges 0 : { *(.debug_aranges) }
nuclear@0 281 .debug_pubnames 0 : { *(.debug_pubnames) }
nuclear@0 282 /* DWARF 2 */
nuclear@0 283 .debug_info 0 : { *(.debug_info) }
nuclear@0 284 .debug_abbrev 0 : { *(.debug_abbrev) }
nuclear@0 285 .debug_line 0 : { *(.debug_line) }
nuclear@0 286 .debug_frame 0 : { *(.debug_frame) }
nuclear@0 287 .debug_str 0 : { *(.debug_str) }
nuclear@0 288 .debug_loc 0 : { *(.debug_loc) }
nuclear@0 289 .debug_macinfo 0 : { *(.debug_macinfo) }
nuclear@0 290 /* SGI/MIPS DWARF 2 extensions */
nuclear@0 291 .debug_weaknames 0 : { *(.debug_weaknames) }
nuclear@0 292 .debug_funcnames 0 : { *(.debug_funcnames) }
nuclear@0 293 .debug_typenames 0 : { *(.debug_typenames) }
nuclear@0 294 .debug_varnames 0 : { *(.debug_varnames) }
nuclear@0 295 .stack 0x80000 : { _stack = .; *(.stack) }
nuclear@0 296 /* These must appear regardless of . */
nuclear@0 297 }