Uma shankar <shankar...@gmail.com> writes: > Cross-MIPS gcc version (for Linux target) used is 4.3.2 > > Today I saw that .so files of MIPS contain some undef symbols with > non-zero value > > The few I saw are defined in libC > > Wont this confuse dynamic linker of 4.3.2 ? ( i know that in 4.3.3. > , there is the STO_MIPS_PLT check which skip these. ) > > How does the dynamic linker ignore them during lookup ? > What is the purpose of these symbols ?
This question is not appropriate for the gcc@gcc.gnu.org mailing list. It would be appropriate for gcc-h...@gcc.gnu.org. Please take any followups to gcc-help. Thanks. Having SHN_UNDEF symbols with a non-zero value is perfectly normal for MIPS shared libraries. The dynamic linker uses them to handle function pointer comparisons across shared libraries. For details see the ELF MIPS processor supplement, which is available online. Ian
