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glibc  2.9
do-lookup.h
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00001 /* MIPS-specific veneer to GLIBC's do-lookup.h.
00002    Copyright (C) 2008 Free Software Foundation, Inc.
00003    This file is part of the GNU C Library.
00004 
00005    The GNU C Library is free software; you can redistribute it and/or
00006    modify it under the terms of the GNU Lesser General Public
00007    License as published by the Free Software Foundation; either
00008    version 2.1 of the License, or (at your option) any later version.
00009 
00010    The GNU C Library is distributed in the hope that it will be useful,
00011    but WITHOUT ANY WARRANTY; without even the implied warranty of
00012    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
00013    Lesser General Public License for more details.
00014 
00015    You should have received a copy of the GNU Lesser General Public
00016    License along with the GNU C Library; if not, write to the Free
00017    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
00018    02111-1307 USA.  */
00019 
00020 /* The semantics of zero/non-zero values of undefined symbols differs
00021    depending on whether the non-PIC ABI is in use.  Under the non-PIC ABI,
00022    a non-zero value indicates that there is an address reference to the
00023    symbol and thus it must always be resolved (except when resolving a jump
00024    slot relocation) to the PLT entry whose address is provided as the
00025    symbol's value; a zero value indicates that this canonical-address
00026    behaviour is not required.  Yet under the classic MIPS psABI, a zero value
00027    indicates that there is an address reference to the function and the
00028    dynamic linker must resolve the symbol immediately upon loading.  To
00029    avoid conflict, symbols for which the dynamic linker must assume the
00030    non-PIC ABI semantics are marked with the STO_MIPS_PLT flag.  The
00031    following ugly hack causes the code in the platform-independent
00032    do-lookup.h file to check this flag correctly.  */
00033 #define st_value st_shndx == SHN_UNDEF && !(sym->st_other & STO_MIPS_PLT)) \
00034                || (sym->st_value
00035 #include_next "do-lookup.h"
00036 #undef st_value
00037