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Summary: This patch is to teach `llvm-objdump` dump dynamic symbols (`-T` and `--dynamic-syms`). Currently, this patch is not fully compatible with `gnu-objdump`, but I would like to continue working on this in next few patches. It has two issues. 1. Some symbols shouldn't be marked as global(g). (`-t/--syms` has same issue as well) (Fixed by D75659) 2. `gnu-objdump` can dump version information and *dynamically* insert before symbol name field. `objdump -T a.out` gives: ``` DYNAMIC SYMBOL TABLE: 0000000000000000 w D *UND* 0000000000000000 _ITM_deregisterTMCloneTable 0000000000000000 DF *UND* 0000000000000000 GLIBC_2.2.5 printf 0000000000000000 DF *UND* 0000000000000000 GLIBC_2.2.5 __libc_start_main 0000000000000000 w D *UND* 0000000000000000 __gmon_start__ 0000000000000000 w D *UND* 0000000000000000 _ITM_registerTMCloneTable 0000000000000000 w DF *UND* 0000000000000000 GLIBC_2.2.5 __cxa_finalize ``` `llvm-objdump -T a.out` gives: ``` DYNAMIC SYMBOL TABLE: 0000000000000000 w D *UND* 0000000000000000 _ITM_deregisterTMCloneTable 0000000000000000 g DF *UND* 0000000000000000 printf 0000000000000000 g DF *UND* 0000000000000000 __libc_start_main 0000000000000000 w D *UND* 0000000000000000 __gmon_start__ 0000000000000000 w D *UND* 0000000000000000 _ITM_registerTMCloneTable 0000000000000000 w DF *UND* 0000000000000000 __cxa_finalize ``` Reviewers: jhenderson, grimar, MaskRay, espindola Reviewed By: jhenderson, grimar Subscribers: emaste, rupprecht, llvm-commits Tags: #llvm Differential Revision: https://reviews.llvm.org/D75756
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