{"action":"closed","issue":{"url":"https://api.github.com/repos/klange/toaruos/issues/87","labels_url":"https://api.github.com/repos/klange/toaruos/issues/87/labels{/name}","comments_url":"https://api.github.com/repos/klange/toaruos/issues/87/comments","events_url":"https://api.github.com/repos/klange/toaruos/issues/87/events","html_url":"https://github.com/klange/toaruos/issues/87","id":76266981,"number":87,"title":"Common symbols (COM) in modules are not allocated properly","user":{"login":"gerow","id":403962,"avatar_url":"https://avatars.githubusercontent.com/u/403962?v=3","gravatar_id":"","url":"https://api.github.com/users/gerow","html_url":"https://github.com/gerow","followers_url":"https://api.github.com/users/gerow/followers","following_url":"https://api.github.com/users/gerow/following{/other_user}","gists_url":"https://api.github.com/users/gerow/gists{/gist_id}","starred_url":"https://api.github.com/users/gerow/starred{/owner}{/repo}","subscriptions_url":"https://api.github.com/users/gerow/subscriptions","organizations_url":"https://api.github.com/users/gerow/orgs","repos_url":"https://api.github.com/users/gerow/repos","events_url":"https://api.github.com/users/gerow/events{/privacy}","received_events_url":"https://api.github.com/users/gerow/received_events","type":"User","site_admin":false},"labels":[],"state":"closed","locked":false,"assignee":null,"milestone":null,"comments":10,"created_at":"2015-05-14T07:24:41Z","updated_at":"2015-05-14T16:47:33Z","closed_at":"2015-05-14T16:47:33Z","body":"I was poking around and noticed that an uninitialized static in a module I was using wasn't properly being zeroed. I've produced an example in a branch of mine called bss-issue: https://github.com/gerow/toaruos/tree/bss-issue\r\n\r\nCuriously, the .bss section in bss_test.ko seems to be of Size 0:\r\n\r\n```\r\n$ readelf -S hdd/mod/bss_test.ko \r\nThere are 15 section headers, starting at offset 0x204:\r\n\r\nSection Headers:\r\n  [Nr] Name              Type            Addr     Off    Size   ES Flg Lk Inf Al\r\n  [ 0]                   NULL            00000000 000000 000000 00      0   0  0\r\n  [ 1] .text             PROGBITS        00000000 000040 000058 00  AX  0   0 16\r\n  [ 2] .rel.text         REL             00000000 00061c 000028 08     13   1  4\r\n  [ 3] .data             PROGBITS        00000000 000098 000018 00  WA  0   0  4\r\n  [ 4] .rel.data         REL             00000000 000644 000030 08     13   3  4\r\n  [ 5] .bss              NOBITS          00000000 0000b0 000000 00  WA  0   0  4\r\n  [ 6] .rodata.str1.1    PROGBITS        00000000 0000b0 000018 01 AMS  0   0  1\r\n  [ 7] moddeps           PROGBITS        00000000 0000c8 00000b 00  WA  0   0  1\r\n  [ 8] .rodata.str1.4    PROGBITS        00000000 0000d4 000031 01 AMS  0   0  4\r\n  [ 9] .comment          PROGBITS        00000000 000105 000012 01  MS  0   0  1\r\n  [10] .eh_frame         PROGBITS        00000000 000118 000078 00   A  0   0  4\r\n  [11] .rel.eh_frame     REL             00000000 000674 000018 08     13  10  4\r\n  [12] .shstrtab         STRTAB          00000000 000190 000071 00      0   0  1\r\n  [13] .symtab           SYMTAB          00000000 00045c 000130 10     14  15  4\r\n  [14] .strtab           STRTAB          00000000 00058c 00008f 00      0   0  1\r\nKey to Flags:\r\n  W (write), A (alloc), X (execute), M (merge), S (strings)\r\n  I (info), L (link order), G (group), T (TLS), E (exclude), x (unknown)\r\n  O (extra OS processing required) o (OS specific), p (processor specific)\r\n```\r\n\r\nIs the .bss section supposed to have a size, or is there some magic going on that I'm unaware of? Either way, the fact that sometimes these statics are nonzero is a bit troubling."}}