Hi Daniel, On Thu, 2016-09-22 at 15:37 -0700, Daniel Mentz wrote: > On Thu, Sep 22, 2016 at 1:59 PM, Vineet Gupta > <Vineet.Gupta1 at synopsys.com> wrote: > > > > Hi Daniel, > > > > On 09/19/2016 06:21 PM, Daniel Mentz wrote: > > > > > > I confirmed that the .eh_frame section is present and that the > > > .debug_frame section is absent. I also verified that the file size of > > > the .ko files are small enough for our embedded platform and that > > > unnecessary sections like .debug_info, .debug_line, .debug_str etc. > > > are also absent. > > > > BTW it seems with my latest set of patches, modules still have .debug_*. > > Can you double check if your tree still has the interim patch which added a linker > > script for modules to strip out .debug_* > > > > http://lists.infradead.org/pipermail/linux-snps-arc/2016-September/001483.html > > Hi Vineet, > > Sorry, that was a misunderstanding. Buildroot routinely runs the strip > command on .ko files before installing them on the target. I was only > looking at the .ko files *after* running the strip command. No, the > interim patch was not in my tree. Well are you sure buildroot really touches modules in Linux kernel build folder? Buildroot just runs a simple "make" command in "output/build/linux-x.y". And only on installation step Buildroot strips binaries in "output/target" folder. Moreover starting from that commit https://git.buildroot.net/buildroot/commit/?id=10c4d27aef4dca01572cfc8146cbfd194a1a85e4 even on Linux installation step Buildroot reuses kernel's module stripping infrastructure but again that happens only on target. Just in case that's what I see when building MSDOSFS as module. In build folder: ----------------------------->8------------------------------- arc-linux-readelf -S build/linux-4.7.3/fs/fat/msdos.ko There are 38 section headers, starting at offset 0x2a630: Section Headers: ? [Nr] Name??????????????Type????????????Addr?????Off????Size???ES Flg Lk Inf Al ? [ 0]???????????????????NULL????????????00000000 000000 000000 00??????0???0??0 ? [ 1] .note.gnu.build-i NOTE????????????00000000 000034 000024 00???A??0???0??4 ? [ 2] .text?????????????PROGBITS????????00000000 000058 0013a8 00??AX??0???0??4 ? [ 3] .rela.text????????RELA????????????00000000 01c774 000600 0c???I 35???2??4 ? [ 4] .init.text????????PROGBITS????????00000000 001400 000010 00??AX??0???0??4 ? [ 5] .rela.init.text???RELA????????????00000000 01cd74 000018 0c???I 35???4??4 ? [ 6] .exit.text????????PROGBITS????????00000000 001410 000010 00??AX??0???0??4 ? [ 7] .rela.exit.text???RELA????????????00000000 01cd8c 000018 0c???I 35???6??4 ? [ 8] .rodata???????????PROGBITS????????00000000 001440 000100 00???A??0???0 64 ? [ 9] .rela.rodata??????RELA????????????00000000 01cda4 000078 0c???I 35???8??4 ? [10] .modinfo??????????PROGBITS????????00000000 001540 000090 00???A??0???0??4 ? [11] .rodata.str1.4????PROGBITS????????00000000 0015d0 000030 01 AMS??0???0??4 ? [12] .data?????????????PROGBITS????????00000000 001600 00002c 00??WA??0???0??4 ? [13] .rela.data????????RELA????????????00000000 01ce1c 000030 0c???I 35??12??4 ? [14] .gnu.linkonce.thi PROGBITS????????00000000 001640 000140 00??WA??0???0 64 ? [15] .rela.gnu.linkonc RELA????????????00000000 01ce4c 00000c 0c???I 35??14??4 ? [16] .tdata????????????PROGBITS????????00000000 001780 000000 00 WAT??0???0??1 ? [17] .tbss?????????????NOBITS??????????00000000 001780 000000 00 WAT??0???0??1 ? [18] .bss??????????????NOBITS??????????00000000 001780 000000 00??WA??0???0??1 ? [19] .comment??????????PROGBITS????????00000000 001780 000078 01??MS??0???0??1 ? [20] .note.GNU-stack???PROGBITS????????00000000 0017f8 000000 00??????0???0??1 ? [21] .debug_aranges????PROGBITS????????00000000 0017f8 000048 00??????0???0??1 ? [22] .rela.debug_arang RELA????????????00000000 01ce58 00003c 0c???I 35??21??4 ? [23] .debug_info???????PROGBITS????????00000000 001840 00eaa9 00??????0???0??1 ? [24] .rela.debug_info??RELA????????????00000000 01ce94 00a53c 0c???I 35??23??4 ? [25] .debug_abbrev?????PROGBITS????????00000000 0102e9 0008b3 00??????0???0??1 ? [26] .debug_line???????PROGBITS????????00000000 010b9c 001d4d 00??????0???0??1 ? [27] .rela.debug_line??RELA????????????00000000 0273d0 001818 0c???I 35??26??4 ? [28] .debug_frame??????PROGBITS????????00000000 0128ec 0002d8 00??????0???0??4 ? [29] .rela.debug_frame RELA????????????00000000 028be8 000168 0c???I 35??28??4 ? [30] .debug_str????????PROGBITS????????00000000 012bc4 008485 01??MS??0???0??1 ? [31] .debug_loc????????PROGBITS????????00000000 01b049 000b49 00??????0???0??1 ? [32] .rela.debug_loc???RELA????????????00000000 028d50 001308 0c???I 35??31??4 ? [33] .debug_ranges?????PROGBITS????????00000000 01bb92 0001f8 00??????0???0??1 ? [34] .rela.debug_range RELA????????????00000000 02a058 000480 0c???I 35??33??4 ? [35] .symtab???????????SYMTAB??????????00000000 01bd8c 0005e0 10?????36??53??4 ? [36] .strtab???????????STRTAB??????????00000000 01c36c 000407 00??????0???0??1 ? [37] .shstrtab?????????STRTAB??????????00000000 02a4d8 000157 00??????0???0??1 Key to Flags: ? W (write), A (alloc), X (execute), M (merge), S (strings), I (info), ? L (link order), O (extra OS processing required), G (group), T (TLS), ? C (compressed), x (unknown), o (OS specific), E (exclude), ? p (processor specific) ----------------------------->8------------------------------- On target: ----------------------------->8------------------------------- arc-linux-readelf -S target/lib/modules/4.7.3/kernel/fs/fat/msdos.ko? There are 24 section headers, starting at offset 0x28e0: Section Headers: ? [Nr] Name??????????????Type????????????Addr?????Off????Size???ES Flg Lk Inf Al ? [ 0]???????????????????NULL????????????00000000 000000 000000 00??????0???0??0 ? [ 1] .note.gnu.build-i NOTE????????????00000000 000034 000024 00???A??0???0??4 ? [ 2] .text?????????????PROGBITS????????00000000 000058 0013a8 00??AX??0???0??4 ? [ 3] .rela.text????????RELA????????????00000000 002128 000600 0c???I 21???2??4 ? [ 4] .init.text????????PROGBITS????????00000000 001400 000010 00??AX??0???0??4 ? [ 5] .rela.init.text???RELA????????????00000000 002728 000018 0c???I 21???4??4 ? [ 6] .exit.text????????PROGBITS????????00000000 001410 000010 00??AX??0???0??4 ? [ 7] .rela.exit.text???RELA????????????00000000 002740 000018 0c???I 21???6??4 ? [ 8] .rodata???????????PROGBITS????????00000000 001440 000100 00???A??0???0 64 ? [ 9] .rela.rodata??????RELA????????????00000000 002758 000078 0c???I 21???8??4 ? [10] .modinfo??????????PROGBITS????????00000000 001540 000090 00???A??0???0??4 ? [11] .rodata.str1.4????PROGBITS????????00000000 0015d0 000030 01 AMS??0???0??4 ? [12] .data?????????????PROGBITS????????00000000 001600 00002c 00??WA??0???0??4 ? [13] .rela.data????????RELA????????????00000000 0027d0 000030 0c???I 21??12??4 ? [14] .gnu.linkonce.thi PROGBITS????????00000000 001640 000140 00??WA??0???0 64 ? [15] .rela.gnu.linkonc RELA????????????00000000 002800 00000c 0c???I 21??14??4 ? [16] .tdata????????????PROGBITS????????00000000 001780 000000 00 WAT??0???0??1 ? [17] .tbss?????????????NOBITS??????????00000000 001780 000000 00 WAT??0???0??1 ? [18] .bss??????????????NOBITS??????????00000000 001780 000000 00??WA??0???0??1 ? [19] .comment??????????PROGBITS????????00000000 001780 000078 01??MS??0???0??1 ? [20] .note.GNU-stack???PROGBITS????????00000000 0017f8 000000 00??????0???0??1 ? [21] .symtab???????????SYMTAB??????????00000000 0017f8 000540 10?????22??43??4 ? [22] .strtab???????????STRTAB??????????00000000 001d38 0003ed 00??????0???0??1 ? [23] .shstrtab?????????STRTAB??????????00000000 00280c 0000d3 00??????0???0??1 Key to Flags: ? W (write), A (alloc), X (execute), M (merge), S (strings), I (info), ? L (link order), O (extra OS processing required), G (group), T (TLS), ? C (compressed), x (unknown), o (OS specific), E (exclude), ? p (processor specific) ----------------------------->8------------------------------- -Alexey
