Re: linker script variables

[Markus Duft <markus dot duft at salomon dot at>]

Alan Modra wrote:
> On Tue, Jan 12, 2010 at 08:41:59AM +0100, Markus Duft wrote:
>> now when looking at the attached linker script, i would think, that the
> 
> How did you invoke the linker?  From the symptoms I'd guess you didn't
> specify the script using "-T uTachyon.ld" but just added the script as
> one of the linker input files.  In that case your script augments the
> standard script.  All of your output section statements are merged
> with the standard ones..
> 

first of all, thanks for the reply. i checked again, digged a little
deeper, and realized that i was linking with gcc, not ld, so i guess
that the -T option was ignored ...?

however, after changing the makefile accordingly from:

$(LINK.o) $(FREESTANDING_OPTS) $^ -o $@ -T $(TARGET_SCRIPT)

to

ld $^ -o $@ -T $(TARGET_SCRIPT)

the same thing happens...

after thinking of it .... wait a sec... owh... -T is position dependent,
right? ...argh.

hmm. doesn't help either; now tried all of those, but still no luck, damn:

$(LINK.o) $(FREESTANDING_OPTS) $^ -o $@ -T $(TARGET_SCRIPT)
$(LINK.o) -Wl,-T -Wl,$(TARGET_SCRIPT) $(FREESTANDING_OPTS) $^ -o $@
ld $^ -o $@ -T $(TARGET_SCRIPT)
ld -dT $(TARGET_SCRIPT) $^ -o $@
ld -T $(TARGET_SCRIPT) $^ -o $@

the LINK.o definition BTW is the GNU make builtin one...

anyway - the idea was good. at first it got me thinking i made a really
stupid mistake ;)

below is some more --verbose output from ld, which makes me think that
the linker script should be fine now - symbols still show the same
values as before... :*(

ld --verbose -dT ./Platforms/ia32/uTachyon.ld
Platforms/ia32/multiboot_hdr.o Platforms/ia32/multiboot_entry.o
Platforms/ia32/multiboot.o Platforms/ia32/c-console.o
Platforms/ia32/console.o Platforms/ia32/gxx-support.o
Platforms/ia32/uTachyon.ld -o Platforms/ia32/uTachyon
GNU ld (GNU Binutils) 2.18
  Supported emulations:
    ...<omitted platforms>...
opened script file ./Platforms/ia32/uTachyon.ld
using external linker script:
==================================================
ENTRY(uTachyonEntry)

SECTIONS
{
	. = 0x00100000;

	.text : {
		uTachyonCodeStart = .;
		*(.text)
	}

	.rodata ALIGN(0x1000) : {
		uTachyonRoDataStart = .;
		*(.rodata*)
	}

	.data ALIGN(0x1000) : {
		uTachyonCtors = .;
		*(.ctor*)
		uTachyonCtorsEnd = .;
		uTachyonDtors = .;
		*(.dtor*)
		uTachyonDtorsEnd = .;

		uTachyonDataStart = .;
		*(.data)
	}

	.bss ALIGN(0x1000) : {
		uTachyonBssStart = .;
		*(COMMON)
		*(.bss)
		uTachyonBssEnd = .;
	}
}

==================================================
attempt to open Platforms/ia32/multiboot_hdr.o succeeded
Platforms/ia32/multiboot_hdr.o
attempt to open Platforms/ia32/multiboot_entry.o succeeded
Platforms/ia32/multiboot_entry.o
attempt to open Platforms/ia32/multiboot.o succeeded
Platforms/ia32/multiboot.o
attempt to open Platforms/ia32/c-console.o succeeded
Platforms/ia32/c-console.o
attempt to open Platforms/ia32/console.o succeeded
Platforms/ia32/console.o
attempt to open Platforms/ia32/gxx-support.o succeeded
Platforms/ia32/gxx-support.o
attempt to open Platforms/ia32/uTachyon.ld succeeded
opened script file Platforms/ia32/uTachyon.ld

that's it....

Cheers, Markus