Question on using a linker script

[Iru Cai]

Hi,

I'm new to use a linker script to define the sections for ELF output, 
but I'm having problems and cannot find any related document.

I create a simple object file from assembly like this:

.section .text.start
.global _start
_start:
   nop

And build it using ``as -c test.S -o test.o`` to get an x86_64 ELF object.

Then I write a linker script, which has some area for a special RAM and 
a special address space for code:

SECTIONS
{
     .text 0x00000000 :
     {
         *(.text.start)
         ASSERT((. <= 0x00040000), "No room for initial code.");
     }
     .data :
     {
         *(.data)
         ASSERT((. <= 0x003c0000), "No room for .data");
     }
     .ram 0x003c0000 :
     {
         *(.ram)
         ASSERT((. <= 0x00400000), "No room for RAM.");
     }
     .text 0x08000000 : { *(.text) }
}

Since my object file test.o only has .text.start section, I think I'll 
only get a code segment, and only a .text section. However, ld reports 
an assertion fail:

$ ld.bfd -T test.ld test.o -o test
ld.bfd: No room for RAM.

I also tried ld.gold and ld.lld, they can link the object but have 
different result.

So what's wrong with my linker script, or is this a bug for ld?

Thanks
Iru