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>> Is there any way to control how the default startup code ends up in the output file/the virutal address it gets and/or what output section it's included in? I do it by putting it in a seperate segment. More specifically, I have my own "crt0.s" it contains the reset vector and other IRQ like things below is the relavent snippit in ARM assembly >> .section .vectors >> .global reset_vector >> .type reset_vector,function >> reset_vector: >> ldr pc,_Handle_RESET >> ldr pc,_Handle_SWI >> ldr pc,_Handle_PFA >> ldr pc,_Handle_DA >> ldr pc,_Handle_NOTUSED >> ldr pc,_Handle_IRQ >> ldr pc,_Handle_FIQ >> vector_end: >> .size reset_vector,vector_end - reset_vector >> _Handle_RESET: >> .word Handle_RESET >> _Handle_SWI: >> .word Handle_SWI >> _Handle_PFA: >> .word Handle_PFA >> _Handle_DA: >> .word Handle_DA >> _Handle_NOTUSED: >> .word Handle_NOTUSED >> _Handle_IRQ: >> .word Handle_IRQ >> _Handle_FIQ: >> .word Handle_FIQ Then, in the linker script I do this: >> SECTIONS >> { >> . = 0x0000; >> ROM_START = .; >> .vectors : { *(.vectors) } >> . = 0x1000; /* code starts at 4K */ >> .text : { *(.text) } >> ... and so forth .... The *PROBLEM* with this is by default the '.vectors' segment is not tagged as loadable perhaps there is a way to do this in GAS, it was not obvious to me. Result is - various tools skip/ignore this segment and it does not get downloaded to the target. I solve it via OBJCOPY like this: arm-elf-objcopy --set-section-flags .vectors=alloc,contents,load,readonly,code INFILE.axf OUTFILE.axf -Duane. ------ Want more information? See the CrossGCC FAQ, http://www.objsw.com/CrossGCC/ Want to unsubscribe? Send a note to crossgcc-unsubscribe@sources.redhat.com
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