started tweaking with stuff

1 files changed, 296 insertions, 0 deletions

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+/* Linker Script Original v1.3 by Jeff Frohwein     */
+/*  v1.0 - Original release                         */
+/*  v1.1 - Added proper .data section support       */
+/*  v1.2 - Added support for c++ & iwram overlays   */
+/*       - Major contributions by Jason Wilkins.    */
+/*  v1.3 - .ewram section now can be used when      */
+/*         compiling for MULTIBOOT mode. This fixes */
+/*         malloc() in DevKitAdvance which depends  */
+/*         on __eheap_start instead of end to define*/
+/*         the starting location of heap space.     */
+/*         External global variable __gba_iwram_heap*/
+/*         support added to allow labels end, _end, */
+/*         & __end__ to point to end of iwram or    */
+/*         the end of ewram.                        */
+/*      Additions by WinterMute                 */
+/* v1.4 -       .sbss section added for unitialised             */
+/*                  data in ewram                                                       */
+/* v1.5 -       padding section added to stop EZF               */
+/*                  stripping important data                            */
+/* v1.6 -       added memory sections                                   */
+
+/* This file is released into the public domain         */
+/* for commercial or non-commercial use with no         */
+/* restrictions placed upon it.                                         */
+
+/* NOTE!!!: This linker script defines the RAM &  */
+/*   ROM start addresses. In order for it to work */
+/*   properly, remove -Ttext and -Tbss linker     */
+/*   options from your makefile if they are       */
+/*   present.                                     */
+
+/* You can use the following to view section      */
+/* addresses in your .elf file:                   */
+/*   objdump -h file.elf                          */
+/* Please note that empty sections may incorrectly*/
+/* list the lma address as the vma address for    */
+/* some versions of objdump.                      */
+
+OUTPUT_FORMAT("elf32-littlearm", "elf32-bigarm", "elf32-littlearm")
+OUTPUT_ARCH(arm)
+ENTRY(_start)
+
+MEMORY {
+
+        rom     : ORIGIN = 0x08000000, LENGTH = 32M
+        iwram   : ORIGIN = 0x03000000, LENGTH = 32K
+        ewram   : ORIGIN = 0x02000000, LENGTH = 256K
+}
+
+
+
+__text_start    =       ORIGIN(ewram);
+__eheap_end     =       ORIGIN(ewram) + LENGTH(ewram);
+__iwram_start   =       ORIGIN(iwram);
+__iwram_top     =       ORIGIN(iwram) + LENGTH(iwram);;
+
+__sp_irq        =       __iwram_top - 0x060;
+__sp_usr        =       __sp_irq - 0x0a0;
+__irq_flags     =       0x03007ff8;
+
+SECTIONS
+{
+        . = __text_start;
+        .init :
+        {
+                KEEP (*(.init))
+                . = ALIGN(4);
+        } >ewram =0xff
+
+        .plt :
+        {
+                *(.plt)
+                . = ALIGN(4);   /* REQUIRED. LD is flaky without it. */
+        } >ewram
+
+        .text  ALIGN (4):
+        {
+                *(EXCLUDE_FILE (*.iwram*) .text)
+                *(.text .stub .text.* .gnu.linkonce.t.*)
+                KEEP (*(.text.*personality*))
+                /* .gnu.warning sections are handled specially by elf32.em.  */
+                *(.gnu.warning)
+                *(.glue_7t) *(.glue_7) *(.vfp11_veneer)
+                . = ALIGN(4);  /* REQUIRED. LD is flaky without it. */
+        } >ewram = 0xff
+
+        __text_end = .;
+        .fini           :
+        {
+                KEEP (*(.fini))
+                . = ALIGN(4);   /* REQUIRED. LD is flaky without it. */
+        } >ewram =0
+
+        .rodata :
+        {
+                *(.rodata)
+                *all.rodata*(*)
+                *(.roda)
+                *(.rodata.*)
+                *(.gnu.linkonce.r*)
+                SORT(CONSTRUCTORS)
+                . = ALIGN(4);   /* REQUIRED. LD is flaky without it. */
+        } >ewram = 0xff
+
+  .ARM.extab   : { *(.ARM.extab* .gnu.linkonce.armextab.*) } >ewram
+   __exidx_start = .;
+  .ARM.exidx   : { *(.ARM.exidx* .gnu.linkonce.armexidx.*) } >ewram
+   __exidx_end = .;
+  /* Ensure the __preinit_array_start label is properly aligned.  We
+     could instead move the label definition inside the section, but
+     the linker would then create the section even if it turns out to
+     be empty, which isn't pretty.  */
+  . = ALIGN(32 / 8);
+  PROVIDE (__preinit_array_start = .);
+  .preinit_array     : { KEEP (*(.preinit_array)) } >ewram = 0xff
+  PROVIDE (__preinit_array_end = .);
+  PROVIDE (__init_array_start = .);
+  .init_array     : { KEEP (*(.init_array)) } >ewram = 0xff
+  PROVIDE (__init_array_end = .);
+  PROVIDE (__fini_array_start = .);
+  .fini_array     : { KEEP (*(.fini_array)) } >ewram = 0xff
+  PROVIDE (__fini_array_end = .);
+        .ctors :
+        {
+                /*      gcc uses crtbegin.o to find the start of the constructors, so
+                        we make sure it is first.  Because this is a wildcard, it
+                        doesn't matter if the user does not actually link against
+                        crtbegin.o; the linker won't look for a file to match a
+                        wildcard.  The wildcard also means that it doesn't matter which
+                        directory crtbegin.o is in.  */
+                KEEP (*crtbegin.o(.ctors))
+                KEEP (*(EXCLUDE_FILE (*crtend.o) .ctors))
+                KEEP (*(SORT(.ctors.*)))
+                KEEP (*(.ctors))
+                . = ALIGN(4);   /* REQUIRED. LD is flaky without it. */
+        } >ewram = 0
+
+        .dtors :
+        {
+                KEEP (*crtbegin.o(.dtors))
+                KEEP (*(EXCLUDE_FILE (*crtend.o) .dtors))
+                KEEP (*(SORT(.dtors.*)))
+                KEEP (*(.dtors))
+                . = ALIGN(4);   /* REQUIRED. LD is flaky without it. */
+        } >ewram = 0
+
+        .jcr            : { KEEP (*(.jcr)) } >ewram
+        .eh_frame :
+        {
+                KEEP (*(.eh_frame))
+        . = ALIGN(4);   /* REQUIRED. LD is flaky without it. */
+        } >ewram = 0
+
+        .gcc_except_table :
+        {
+                *(.gcc_except_table)
+                . = ALIGN(4);   /* REQUIRED. LD is flaky without it. */
+        } >ewram = 0
+
+        __iwram_lma = .;
+
+        .iwram __iwram_start : AT (__iwram_lma)
+        {
+                __iwram_start__ = ABSOLUTE(.) ;
+                *(.iwram)
+                *iwram.*(.text)
+                . = ALIGN(4);   /* REQUIRED. LD is flaky without it. */
+                __iwram_end__ = ABSOLUTE(.) ;
+        } >iwram = 0xff
+
+        __data_lma = __iwram_lma + SIZEOF(.iwram) ;
+
+        .bss ALIGN(4) (NOLOAD):
+        {
+                __bss_start__ = ABSOLUTE(.);
+                *(.dynbss)
+                *(.gnu.linkonce.b*)
+                *(.bss*)
+                *(COMMON)
+                . = ALIGN(4);    /* REQUIRED. LD is flaky without it. */
+                __bss_end__ = ABSOLUTE(.) ;
+        }
+
+        .data ALIGN(4) : AT (__data_lma)
+        {
+                __data_start__ = ABSOLUTE(.);
+                *(.data)
+                *(.data.*)
+                *(.gnu.linkonce.d*)
+                CONSTRUCTORS
+                . = ALIGN(4);  /* REQUIRED. LD is flaky without it. */
+                __data_end__  =  ABSOLUTE(.);
+        } >iwram = 0xff
+
+        __iwram_overlay_lma = __data_lma + SIZEOF(.data);
+
+        PROVIDE (edata = .);
+        __iwram_overlay_start = . ;
+
+        OVERLAY ALIGN(4) : NOCROSSREFS AT (__iwram_overlay_lma)
+        {
+           .iwram0 { *(.iwram0) . = ALIGN(4);}
+           .iwram1 { *(.iwram1) . = ALIGN(4);}
+           .iwram2 { *(.iwram2) . = ALIGN(4);}
+           .iwram3 { *(.iwram3) . = ALIGN(4);}
+           .iwram4 { *(.iwram4) . = ALIGN(4);}
+           .iwram5 { *(.iwram5) . = ALIGN(4);}
+           .iwram6 { *(.iwram6) . = ALIGN(4);}
+           .iwram7 { *(.iwram7) . = ALIGN(4);}
+           .iwram8 { *(.iwram8) . = ALIGN(4);}
+           .iwram9 { *(.iwram9) . = ALIGN(4);}
+        } >iwram = 0xff
+
+        __ewram_lma = LOADADDR(.iwram0) + SIZEOF(.iwram0)+SIZEOF(.iwram1)+SIZEOF(.iwram2)+SIZEOF(.iwram3)+SIZEOF(.iwram4)+SIZEOF(.iwram5)+SIZEOF(.iwram6)+SIZEOF(.iwram7)+SIZEOF(.iwram8)+SIZEOF(.iwram9);
+
+        __iwram_overlay_end = __ewram_lma ;
+
+        /* v1.3 */
+        __ewram_start =  __ewram_lma ;
+
+        .ewram __ewram_start : AT (__ewram_lma)
+        {
+                *(.ewram)
+                . = ALIGN(4);  /* REQUIRED. LD is flaky without it. */
+                __ewram_end = ABSOLUTE(.);
+        } >ewram = 0xff
+
+        __ewram_overlay_lma = __ewram_lma + SIZEOF(.ewram);
+
+        .sbss ALIGN(4)(NOLOAD):
+        {
+                __sbss_start__ = ABSOLUTE(.);
+                *(.sbss)
+                . = ALIGN(4);
+                __sbss_end__  = ABSOLUTE(.);
+                __end__ = ABSOLUTE(.);
+                __eheap_start = ABSOLUTE(.);
+        }
+
+        OVERLAY ALIGN(4): NOCROSSREFS AT (__ewram_overlay_lma)
+        {
+                .ewram0 { *(.ewram0) . = ALIGN(4);}
+                .ewram1 { *(.ewram1) . = ALIGN(4);}
+                .ewram2 { *(.ewram2) . = ALIGN(4);}
+                .ewram3 { *(.ewram3) . = ALIGN(4);}
+                .ewram4 { *(.ewram4) . = ALIGN(4);}
+                .ewram5 { *(.ewram5) . = ALIGN(4);}
+                .ewram6 { *(.ewram6) . = ALIGN(4);}
+                .ewram7 { *(.ewram7) . = ALIGN(4);}
+                .ewram8 { *(.ewram8) . = ALIGN(4);}
+                .ewram9 { *(.ewram9) . = ALIGN(4);}
+        } >ewram = 0xff
+        __ewram_overlay_end  = ABSOLUTE(.);
+
+        __eheap_start = __ewram_overlay_end ;
+
+        _end = __ewram_overlay_end;
+        __end__ = __ewram_overlay_end;
+        __rom_end__ = __ewram_overlay_end;
+
+        /* Stabs debugging sections.  */
+        .stab 0 : { *(.stab) }
+        .stabstr 0 : { *(.stabstr) }
+        .stab.excl 0 : { *(.stab.excl) }
+        .stab.exclstr 0 : { *(.stab.exclstr) }
+        .stab.index 0 : { *(.stab.index) }
+        .stab.indexstr 0 : { *(.stab.indexstr) }
+        .comment 0 : { *(.comment) }
+        /* DWARF debug sections.
+           Symbols in the DWARF debugging sections are relative to the beginning
+           of the section so we begin them at 0.  */
+        /* DWARF 1 */
+        .debug          0 : { *(.debug) }
+        .line           0 : { *(.line) }
+        /* GNU DWARF 1 extensions */
+        .debug_srcinfo  0 : { *(.debug_srcinfo) }
+        .debug_sfnames  0 : { *(.debug_sfnames) }
+        /* DWARF 1.1 and DWARF 2 */
+        .debug_aranges  0 : { *(.debug_aranges) }
+        .debug_pubnames 0 : { *(.debug_pubnames) }
+        /* DWARF 2 */
+        .debug_info     0 : { *(.debug_info) }
+        .debug_abbrev   0 : { *(.debug_abbrev) }
+        .debug_line     0 : { *(.debug_line) }
+        .debug_frame    0 : { *(.debug_frame) }
+        .debug_str      0 : { *(.debug_str) }
+        .debug_loc      0 : { *(.debug_loc) }
+        .debug_macinfo  0 : { *(.debug_macinfo) }
+        /* SGI/MIPS DWARF 2 extensions */
+        .debug_weaknames 0 : { *(.debug_weaknames) }
+        .debug_funcnames 0 : { *(.debug_funcnames) }
+        .debug_typenames 0 : { *(.debug_typenames) }
+        .debug_varnames  0 : { *(.debug_varnames) }
+        .stack 0x80000 : { _stack = .; *(.stack) }
+        /* These must appear regardless of  .  */
+}