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.gup...@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
