Lpc2000

OK..  * is a wildcard.. I guess I should have figure that one out..

Another question, more conceptual.  This ld uses named sections, using >
to say where it will be loaded, and AT> to say where it is at the moment
of reset.  (I think, anyway).  Let's say I also want to use
__attribute__ to define some functions in RAM, naming this ".ramtext" in
my C code.  My guess is that this looks something like this:

  prog : {
         *(.text)
         *(.rodata)
         *(.rodata*)
         *(.glue_7)
         *(.glue_7t)
         __end_of_prog__ = . ;
         } >flash

  .ramtext : {
         __ramtext_beg__ = . ;
         __ramtext_beg_src__ = __end_of_prog__ ;
         *(.ramtext)
         __ramtext_end__ = .;
         } >ram AT>flash

And then my boot.s would just copy (__ramtext_end__ - __ramtext_beg__)
bytes from __ramtext_beg_src__ to __ramtext_beg__.

Is this right?

Thanks.

-----Original Message-----
From: James Dabbs [mailto:jdabbs@...] 
Sent: Thursday, January 22, 2004 7:52 AM
To: lpc2100@yahoogroups.com
Subject: [lpc2100] More ld script questions..


In the file <lpc2106-rom.ld>, from the file <lpc2106_gcc.zip> on the
yahoo site..

in the prog output section, there are these entries:

	*(.rodata)
	*(.rodata*)

I understand that the first means "add the entire contents of the
.rodata input segment into the prog output segment," but what is the
function of that second entry with the asterisk after it?

For reference, I've appended the linker script in its entirety.

Thanks for any guidance.




-----BEGIN LINKER SCRIPT-----

/*
SEARCH_DIR( /home/radsett/install/arm-elf/lib)
SEARCH_DIR( /home/radsett/install/lib/gcc-lib/arm-elf/3.3.2)
*/

MEMORY {
   flash : ORIGIN = 0, LENGTH = 120K
   ram : ORIGIN = 0x40000000, LENGTH = 64K
   }

__stack_end__ = 0x40000000 + 64K - 4;
SECTIONS {
  . = 0;
  startup : { *(.startup)} >flash
  prog : {
         *(.text)
         *(.rodata)
         *(.rodata*)
         *(.glue_7)
         *(.glue_7t)
         } >flash
  __end_of_text__ = .;
  .data : {
         __data_beg__ = .;
         __data_beg_src__ = __end_of_text__;
         *(.data)
         __data_end__ = .;
         } >ram AT>flash
  .bss : {
         __bss_beg__ = .;
         *(.bss)
         } >ram
    /* Align here to ensure that the .bss section occupies space up to
       _end.  Align after .bss to ensure correct alignment even if the
       .bss section disappears because there are no input sections.  */
    . = ALIGN(32 / 8);
   }
   . = ALIGN(32 / 8);
   _end = .;
   _bss_end__ = . ; __bss_end__ = . ; __end__ = . ;
   PROVIDE (end = .);

/*
INPUT( -lc -lgcc)
*/

PROVIDE( undefined_instruction_exception = endless_loop); PROVIDE(
software_interrupt_exception = endless_loop); PROVIDE(
prefetch_abort_exception = endless_loop); PROVIDE( data_abort_exception
= endless_loop); PROVIDE( reserved_exception = endless_loop); PROVIDE(
interrupt_exception = endless_loop); PROVIDE( fast_interrupt_exception =
endless_loop);

PROVIDE( PINSEL0 = 0xE002C000);
PROVIDE( IODIR = 0xE0028008);
PROVIDE( IOCLR = 0xE002800C);
PROVIDE( IOSET = 0xE0028004);

/* UART 0 */

PROVIDE( U0RBR = 0xE000C000);
PROVIDE( U0THR = 0xE000C000);
PROVIDE( U0IER = 0xE000C004);
PROVIDE( U0IIR = 0xE000C008);
PROVIDE( U0FCR = 0xE000C008);
PROVIDE( U0LCR = 0xE000C00C);
PROVIDE( U0LSR = 0xE000C014);
PROVIDE( U0SCR = 0xE000C01C);
PROVIDE( U0DLL = 0xE000C000);
PROVIDE( U0DLM = 0xE000C004);

/* PLL */

PROVIDE( PLLCON = 0xE01FC080);
PROVIDE( PLLCFG = 0xE01FC084);
PROVIDE( PLLSTAT = 0xE01FC088);
PROVIDE( PLLFEED = 0xE01FC08C);

/* MAM */

PROVIDE( MAMCR = 0xE01FC000);
PROVIDE( MAMTIM = 0xE01FC004);

/* VPB */

PROVIDE( VPBDIV = 0xE01FC100);

/* TIMER 0 */

PROVIDE( T0IR = 0xE0004000);
PROVIDE( T0TCR = 0xE0004004);
PROVIDE( T0TC = 0xE0004008);
PROVIDE( T0PR = 0xE000400C);
PROVIDE( T0PC = 0xE0004010);
PROVIDE( T0MCR = 0xE0004014);
PROVIDE( T0MR0 = 0xE0004018);
PROVIDE( T0MR1 = 0xE000401C);
PROVIDE( T0MR2 = 0xE0004020);
PROVIDE( T0MR3 = 0xE0004024);
PROVIDE( T0CCR = 0xE0004028);
PROVIDE( T0CR0 = 0xE000402C);
PROVIDE( T0CR1 = 0xE0004030);
PROVIDE( T0CR2 = 0xE0004034);
PROVIDE( T0EMR = 0xE000403C);


-----END LINKER SCRIPT-----


 


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