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GNU Info (stabs.info)Register VariablesRegister Variables ================== Register variables have their own stab type, `N_RSYM' (`C_RSYM' for XCOFF), and their own symbol descriptor, `r'. The stab's value is the number of the register where the variable data will be stored. AIX defines a separate symbol descriptor `d' for floating point registers. This seems unnecessary; why not just just give floating point registers different register numbers? I have not verified whether the compiler actually uses `d'. If the register is explicitly allocated to a global variable, but not initialized, as in: register int g_bar asm ("%g5"); then the stab may be emitted at the end of the object file, with the other bss symbols. automatically generated by info2www version 1.2.2.9 |