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SubjectRe: [PATCH 7/11] i386: Kallsyms generate relocatable symbols
On Mon, Nov 06, 2006 at 03:48:57PM +0100, Haavard Skinnemoen wrote:
> On Mon, 23 Oct 2006 15:37:48 -0400
> Vivek Goyal <vgoyal@in.ibm.com> wrote:
>
> > Add the _text symbol definitions to the architectures which don't
> > define it otherwise linker will fail.
>
> I get lots of this when building latest -mm for avr32:
>
> .tmp_kallsyms2.S:643: Warning: right operand is a bignum; integer 0
> assumed
>
> Reverting this patch makes the warnings go away. I think it's
> because on avr32, .init is the first section, not .text, so many of the
> offsets become negative and kallsyms doesn't seem to handle this very
> well. Here's a few lines from .tmp_kallsyms2.S:
>
> kallsyms_addresses:
> PTR _text + 0xffffffffffff4000
> PTR _text + 0xffffffffffff4000
>
> Any idea how to fix this? Could we introduce a new symbol that always
> marks the start of the image perhaps?
>

Hi Haavard,

Does the attached patch solve the issue for you?

Thanks
Vivek



o On some platforms like avr32, section init comes before .text and
not necessarily a symbol's relative position w.r.t _text is positive.
In such cases assembler detects the overflow and emits warning. This
patch fixes it.

Signed-off-by: Vivek Goyal <vgoyal@in.ibm.com>
---
scripts/kallsyms.c | 8 ++++++--
1 file changed, 6 insertions(+), 2 deletions(-)
diff -puN scripts/kallsyms.c~i386-reloc-kallsyms-_text-symbol-relative-address-fix scripts/kallsyms.c
--- linux-2.6.19-rc4-reloc/scripts/kallsyms.c~i386-reloc-kallsyms-_text-symbol-relative-address-fix 2006-11-06 10:47:01.000000000 -0500
+++ linux-2.6.19-rc4-reloc-root/scripts/kallsyms.c 2006-11-06 10:47:01.000000000 -0500
@@ -277,8 +277,12 @@ static void write_src(void)
output_label("kallsyms_addresses");
for (i = 0; i < table_cnt; i++) {
if (toupper(table[i].sym[0]) != 'A') {
- printf("\tPTR\t_text + %#llx\n",
- table[i].addr - _text);
+ if (_text <= table[i].addr)
+ printf("\tPTR\t_text + %#llx\n",
+ table[i].addr - _text);
+ else
+ printf("\tPTR\t_text - %#llx\n",
+ _text - table[i].addr);
} else {
printf("\tPTR\t%#llx\n", table[i].addr);
}
_
-
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