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This patch fixes linking of applications compiled with -mabi=64 -msym32.
The -msym32 GCC options forces MIPS backend to emit 32-bit symbols even when compiling for 64-bit ABI, which is most useful for building applications with PLTs to call shared library functions (PLTs are currently supported only for 32-bit symbols for MIPS). Certain applications get a significant performance edge from using PLTs, and such applications should be compiled with "-mabi=64 -mplt -msym32".
Compiling with the above options works just fine until linker tries to put the .text section above 32-bit address space at TEXT_START_ADDR="0x120000000". This patch sets TEXT_START_ADDR to 0x10000000 (which is same as for N32 ABI) when compiling with -msym32 GCC option.
I will post the corresponding GCC patch that tells the linker to use new emulations shortly.
Tested by building complete MIPS64 toolchain (including glibc) with -msym32.
OK to apply?
-- Maxim Kuvyrkov CodeSourcery / Mentor Graphics
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