Christophe, On Sat, Apr 21, 2018 at 9:16 AM, christophe leroy <christophe.leroy@xxxxxx> wrote: > > > Le 20/04/2018 à 22:08, Mathieu Malaterre a écrit : >> >> On Fri, Apr 20, 2018 at 12:41 PM, Nicholas Piggin <npiggin@xxxxxxxxx> >> wrote: >>> >>> On Fri, 20 Apr 2018 12:00:49 +0200 >>> Mathieu Malaterre <malat@xxxxxxxxxx> wrote: >>> >>>> On Fri, Apr 20, 2018 at 9:34 AM, Nicholas Piggin <npiggin@xxxxxxxxx> >>>> wrote: >>>>> >>>>> This requires further changes to linker script to KEEP some tables >>>>> and wildcard compiler generated sections into the right place. This >>>>> includes pp32 modifications from Christophe Leroy. >>>>> >>>>> When compiling powernv_defconfig with this option: >>>>> >>>>> text data bss dec filename >>>>> 11827621 4810490 1341080 17979191 vmlinux >>>>> 11752437 4598858 1338776 17690071 vmlinux.dcde >>>>> >>>>> Resulting kernel is almost 400kB smaller (and still boots). >>>>> >>>>> [ppc32 numbers here] >>>> >>>> >>>> ^^^ >>>> >>>> Do you want somebody else to provide those numbers ? >>> >>> >>> If you have a booting kernel, yes some more numbers would be good. >> >> >> I've used /boot/config-4.15.0-2-powerpc from my current debian >> package. Rebuild master with and without option, boot ok, load/unload >> module ok. >> >> $ size nick/vmlinux.with* >> text data bss dec hex filename >> 7386425 2364370 1425432 11176227 aa8923 nick/vmlinux.with >> 7461457 2475122 1428064 11364643 ad6923 nick/vmlinux.without >> >> This is not clear why with option the size of kernel is slightly bigger: > > > The file contains also debug symbols, which might differ. > Only the LOAD part of the file is interesting, that's the part you get when > doing ppc-linux-objcopy vmlinux vmlinux.bin -O binary > > You can see it with readelf -l vmlinux Here is what I see: $ diff -u <(readelf -l nick/vmlinux.with) <(readelf -l nick/vmlinux.without) --- /proc/self/fd/11 2018-04-23 12:59:52.413101612 +0200 +++ /proc/self/fd/12 2018-04-23 12:59:52.417101567 +0200 @@ -5,9 +5,9 @@ Program Headers: Type Offset VirtAddr PhysAddr FileSiz MemSiz Flg Align - LOAD 0x010000 0xc0000000 0x00000000 0x950f34 0xaad018 RWE 0x10000 - NOTE 0x867640 0xc0857640 0x00857640 0x00024 0x00024 0x4 - NOTE 0x867664 0xc0857664 0x00857664 0x0000c 0x0000c 0x1 + LOAD 0x010000 0xc0000000 0x00000000 0x97ef34 0xadba68 RWE 0x10000 + NOTE 0x87f640 0xc086f640 0x0086f640 0x00024 0x00024 0x4 + NOTE 0x87f664 0xc086f664 0x0086f664 0x0000c 0x0000c 0x1 Section to Segment mapping: Segment Sections... > Christophe > >> >> $ du -sk nick/vmlinux.with* >> 124488 nick/vmlinux.with >> 124004 nick/vmlinux.without >> >> >>> Thanks, >>> Nick > > > --- > L'absence de virus dans ce courrier électronique a été vérifiée par le > logiciel antivirus Avast. > https://www.avast.com/antivirus > -- To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
