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[FreeRTOS Home] [Live FreeRTOS Forum] [FAQ] [Archive Top] [December 2007 Threads] LPC2368 gcc eclipse demo lpc2368ld error?Posted by Gea on December 12, 2007 A question regarding Freertos version 4.6.1 and ARM7 gcc eclipse:
In the lpc2368.ld the __bss_end__ is set to the beginning of ETH Ram. Is this correct? The boot.S file states that the bss region shall be cleared and with __bss_end__ set to to beginning of ETH RAM it tries to clear a lot of RAM? The bss region ranges from ~0x40000000 to 0x7FE00000 according to the lpc2368.ld file. I changed my lpc2368.ld so that __bss_end__ pointed to the end of the bss statement in the lpc2368.ld file.
MEMORY { flash: ORIGIN = 0x00000000, LENGTH = 500K ram: ORIGIN = 0x40000000, LENGTH = 32K usbram : ORIGIN = 0x7FD00000, LENGTH = 8K ethram : ORIGIN = 0x7FE00000, LENGTH = 16K }
__stack_end__ = 0x40000000 + 32K - 4;
SECTIONS { . = 0; startup : { KEEP(*(.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);
/*Better. */ _bss_end__ = . ; __bss_end__ = . ;
.usbram (NOLOAD): { __usbram_beg__ = .; *(.dmaram) __usbram_end__ = .; } >usbram
.ethram (NOLOAD): { __ethram_beg__ = .; *(.ethram) __ethram_end__ = .; } >ethram
} . = ALIGN(32 / 8); _end = .; /*No correct_bss_end__ = . ; __bss_end__ = . ; __end__ = . ;*/ __end__ = .; PROVIDE (end = .);
Is this a bug?
RE: LPC2368 gcc eclipse demo lpc2368ld error?Posted by Richard on December 18, 2007 To be honest I just copied this linker script from an existing example. I think your change is fine, although I don't think the original is a bug as such, just inefficient.
Regards.
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