module linker script: coalesce function and data sections
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From: David Howells on 28 Jul 2010 20:30 Denys Vlasenko <vda.linux(a)googlemail.com> wrote: > + .data 0 : AT(0) { *(.data .data.[A-Za-z0-9_$^]*) } > + .bss 0 : AT(0) { *(.bss .bss.[A-Za-z0-9_$^]*) } What about .sdata and .sbss sections produced by arches that support small data sections? David -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Denys Vlasenko on 28 Jul 2010 21:30 On Thursday 29 July 2010 02:25, David Howells wrote: > Denys Vlasenko <vda.linux(a)googlemail.com> wrote: > > > + .data 0 : AT(0) { *(.data .data.[A-Za-z0-9_$^]*) } > > + .bss 0 : AT(0) { *(.bss .bss.[A-Za-z0-9_$^]*) } > > What about .sdata and .sbss sections produced by arches that support small > data sections? linker groups all similarly-named input sections into one output section with the same name, if the name does not match any rule in the linker script. Basically, it should work as if there is a rule: ..sbss 0 : AT(0) { *(.sbss) } -- vda -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: David Howells on 29 Jul 2010 05:20 Denys Vlasenko <vda.linux(a)googlemail.com> wrote: > linker groups all similarly-named input sections into one output section > with the same name, if the name does not match any rule in the linker > script. > > Basically, it should work as if there is a rule: > > .sbss 0 : AT(0) { *(.sbss) } Okay, thanks. David -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
From: Denys Vlasenko on 5 Aug 2010 22:20
On Tuesday 03 August 2010 15:47, Michal Marek wrote: > On 29.7.2010 01:47, Denys Vlasenko wrote: > > SECTIONS { > > + > > + /* Coalesce sections produced by gcc -ffunction-sections */ > > + .text 0 : AT(0) { *(.text .text.[A-Za-z0-9_$^]*) } > > + > > + /* Coalesce sections produced by gcc -fdata-sections */ > > + .rodata 0 : AT(0) { *(.rodata .rodata.[A-Za-z0-9_$^]*) } > > + .data 0 : AT(0) { *(.data .data.[A-Za-z0-9_$^]*) } > > + .bss 0 : AT(0) { *(.bss .bss.[A-Za-z0-9_$^]*) } > > + > > /DISCARD/ : { *(.discard) } > > } > > I'm now getting > > ld:/home/mmarek/linux-2.6/scripts/module-common.lds:23: ignoring invalid > character `^' in script > ld:/home/mmarek/linux-2.6/scripts/module-common.lds:26: ignoring invalid > character `^' in script > ld:/home/mmarek/linux-2.6/scripts/module-common.lds:27: ignoring invalid > character `^' in script > ld:/home/mmarek/linux-2.6/scripts/module-common.lds:28: ignoring invalid > character `^' in script > > when linking modules and a similar warning when linking vmlinux (caused > by the next patch in series). I tried writing the carets as \^, but that > doesn't help at all... Yep, I can confirm it. The binutils fix to allow caret might be trivial, and will allow us to use much better pattern: [^.]* I created a Fedora bug for it: https://bugzilla.redhat.com/show_bug.cgi?id=621742 So far, please remove these three patches from kbuild tree. (I see that modpost patch is in Linus tree. Thanks!) -- vda -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo(a)vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/ |