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RE: --entry= (slightly off topic)


I get 

a.out:     file format elf32-littlearm
architecture: arm, flags 0x00000112:
EXEC_P, HAS_SYMS, D_PAGED
start address 0x00008000



-----Original Message-----
From: Fabrice Gautier [mailto:Fabrice_Gautier@sdesigns.com] 
Sent: Thursday, September 20, 2001 4:26 PM
To: 'Trenton D. Adams'; 'eCos Discussion'
Subject: RE: [ECOS] --entry= (slightly off topic)


I think you have it right, but setting the entry point does'nt influence
the
memory map. It just set some value in the elf headers.

What is the result of objdump -f on the resulting elf file? It should
display the start adress (ake entry-point)


> -----Original Message-----
> From: Trenton D. Adams [mailto:tadams@theone.dnsalias.com]
> Sent: Thursday, September 20, 2001 3:08 PM
> To: 'eCos Discussion'
> Subject: [ECOS] --entry= (slightly off topic)
> 
> 
> I'm doing the following.  stack_manager.s doesn't have any 
> entry points,
> and I don't know how to make one.  So, I figured I'd just pass
> --entry=0x0 to the linker which should create the entry at 0.
>  arm-elf-gcc.exe -nostdlib -nostartfiles -O1 -Wl,--entry=0x0
> stack_manager.s bootcode-J3-rev4.c
> 
> stack_manager.s 
> 
> However, it ends up like this.
> 00008000 <Prepare_To_Flash-0xc>:
>     8000:       e3a0d201        mov     sp, #268435456  ; 0x10000000
>     8004:       e38ddc96        orr     sp, sp, #38400  ; 0x9600
>     8008:       ebffffff        bl      800c <Prepare_To_Flash>
> 
> 8000 is the default entry point, and that's not what I want.  I want
> 0x00000000.
> 
> So, how do I either:
> - create an entry point in stack_manager.s
> - specify an entry point on the command line
> ???
> 
> I tried a 
> start:
> label before the first instruction in the .s file, but that 
> didn't work.
> 
> Trenton D. Adams
> Extreme Engineering
> #17, 6025 - 12 St. SE
> Calgary, Alberta, Canada
> T2H 2K1
> 
> Phone: 403 640 9494 ext-208
> Fax: 403 640 9599
> 
> http://www.extremeeng.com
> 


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