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/* Linker script for running ELF programs in the Sparc simulator */

OUTPUT_FORMAT("elf32-sparc", "elf32-sparc", "elf32-sparcle")
OUTPUT_ARCH(sparc)
STARTUP(traps.o)
INPUT(erc32-crt0.o)
ENTRY(trap_table)
GROUP(-lc -lerc32 -lgcc)  /*  -lerc32 used to be -lsim */

SEARCH_DIR(.)
/* Do we need any of these for elf?
   __DYNAMIC = 0;    */

/*
 * The memory map looks like this:
 * +--------------------+ <- low memory
 * | .text              |
 * |        _stext       |
 * |        _etext      |
 * |        ctor list   | the ctor and dtor lists are for
 * |        dtor list   | C++ support
 * |        _end_text   |
 * +--------------------+
 * | .data              | initialized data goes here
 * |        _sdata      |
 * |        _edata      |
 * +--------------------+
 * | .bss               |
 * |        __bss_start | start of bss, cleared by crt0
 * |        _end        | start of heap, used by sbrk()
 * +--------------------+
 * |    heap space      |
 * |        _ENDHEAP    |
 * |    stack space     | 
 * |        __stack     | top of stack
 * +--------------------+ <- high memory
 */

/*
 * User modifiable values:
 *
 * _CLOCK_SPEED               in Mhz (used to program the counter/timers)
 *
 * _PROM_SIZE                 size of PROM (permissible values are 4K, 8K, 16K
 *                               32K, 64K, 128K, 256K, and 512K)
 * _RAM_SIZE                  size of RAM (permissible values are 256K, 512K,
 *                               1MB, 2Mb, 4Mb, 8Mb, 16Mb, and 32Mb)
 *
 * These symbols are only used in assembler code, so they only need to
 * be listed once. They should always be refered to without SYM().
 */

_CLOCK_SPEED = 10;

_PROM_SIZE = 4M;
_RAM_SIZE = 256K;

_RAM_START = 0x02000000;
_RAM_END = _RAM_START + _RAM_SIZE;
_STACK_SIZE = (16 * 1024);
_PROM_START = 0x00000000;
_PROM_END = _PROM_START + _PROM_SIZE;


/*
 *  Base address of the on-CPU peripherals
 */

_ERC32_MEC = 0x01f80000;

/*
 * Setup the memory map for the SIS simulator.
 * stack grows up towards low memory. 
 */
/*
MEMORY
{
  rom       : ORIGIN = 0x00000000, LENGTH = 4M
  ram (rwx) : ORIGIN = 0x02000000, LENGTH = 2M
}
*/

__stack = _RAM_START + _RAM_SIZE - 4 * 16;
__trap_stack = (_RAM_START + _RAM_SIZE - 4 * 16) - _STACK_SIZE;

SECTIONS
{
  /* Read-only sections, merged into text segment: */
/*  . = 0x2000000 + SIZEOF_HEADERS; */
  . = 0x2000000;

  .interp     : { *(.interp)    }
  .hash          : { *(.hash)           }
  .dynsym        : { *(.dynsym)         }
  .dynstr        : { *(.dynstr)         }
  .gnu.version   : { *(.gnu.version)    }
  .gnu.version_d   : { *(.gnu.version_d)        }
  .gnu.version_r   : { *(.gnu.version_r)        }
  .rel.text      :
    { *(.rel.text) *(.rel.gnu.linkonce.t*) }
  .rela.text     :
    { *(.rela.text) *(.rela.gnu.linkonce.t*) }
  .rel.data      :
    { *(.rel.data) *(.rel.gnu.linkonce.d*) }
  .rela.data     :
    { *(.rela.data) *(.rela.gnu.linkonce.d*) }
  .rel.rodata    :
    { *(.rel.rodata) *(.rel.gnu.linkonce.r*) }
  .rela.rodata   :
    { *(.rela.rodata) *(.rela.gnu.linkonce.r*) }
  .rel.got       : { *(.rel.got)                }
  .rela.got      : { *(.rela.got)               }
  .rel.ctors     : { *(.rel.ctors)      }
  .rela.ctors    : { *(.rela.ctors)     }
  .rel.dtors     : { *(.rel.dtors)      }
  .rela.dtors    : { *(.rela.dtors)     }
  .rel.init      : { *(.rel.init)       }
  .rela.init     : { *(.rela.init)      }
  .rel.fini      : { *(.rel.fini)       }
  .rela.fini     : { *(.rela.fini)      }
  .rel.bss       : { *(.rel.bss)                }
  .rela.bss      : { *(.rela.bss)               }
  .rel.plt       : { *(.rel.plt)                }
  .rela.plt      : { *(.rela.plt)               }
  .init          : { *(.init)   } =0
  .text      :
  {
    *(.text)
    *(.stub)
    /* .gnu.warning sections are handled specially by elf32.em.  */
    *(.gnu.warning)
    *(.gnu.linkonce.t*)

    __CTOR_LIST__ = .;
    LONG((__CTOR_END__ - __CTOR_LIST__) / 4 - 2)                    
    *(.ctors)
    LONG(0)                                                    
    __CTOR_END__ = .;
    __DTOR_LIST__ = .;
    LONG((__DTOR_END__ - __DTOR_LIST__) / 4 - 2)                     
    *(.dtors)                                                       
    LONG(0)              
    __DTOR_END__ = .;

  } =0
  _etext = .;
  PROVIDE (etext = .);
  .fini      : { *(.fini)    } =0
  .rodata    : { *(.rodata) *(.gnu.linkonce.r*) }
  .rodata1   : { *(.rodata1) }
  /* Adjust the address for the data segment.  We want to adjust up to
     the same address within the page on the next page up.  */
  . = ALIGN(0x10000) + (. & (0x10000 - 1));
  .data    :
  {
    *(.data)
    *(.gnu.linkonce.d*)
  }

  .data1   : { *(.data1) }
  .ctors         :
  {
    *(.ctors)
  }
  .dtors         :
  {
    *(.dtors)
  }
  .plt      : { *(.plt) }
  .got           : { *(.got.plt) *(.got) }
  .dynamic       : { *(.dynamic) }
  /* We want the small data sections together, so single-instruction offsets
     can access them all, and initialized data all before uninitialized, so
     we can shorten the on-disk segment size.  */
  .sdata     : { *(.sdata) }
  _edata  =  .;
  PROVIDE (edata = .);
  . = ALIGN(0x8);
  __bss_start = .;
  .sbss      : { *(.sbss) *(.scommon) }
  .bss       :
  {
   *(.dynbss)
   *(.bss)
   *(COMMON)
  }
  . = ALIGN(32 / 8);
  _end = . ;
  PROVIDE (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) }
  /* These must appear regardless of  .  */
}