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powerpc: Fix ld.so address determination for PCREL mode (bug 31640)
This seems to have stopped working with some GCC 14 versions, which clobber r2. With other compilers, the kernel-provided r2 value is still available at this point. Reviewed-by: Peter Bergner <bergner@linux.ibm.com>
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@ -78,6 +78,7 @@ elf_host_tolerates_class (const Elf64_Ehdr *ehdr)
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static inline Elf64_Addr
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elf_machine_load_address (void) __attribute__ ((const));
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#ifndef __PCREL__
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static inline Elf64_Addr
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elf_machine_load_address (void)
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{
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@ -105,6 +106,24 @@ elf_machine_dynamic (void)
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/* Then subtract off the load address offset. */
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return runtime_dynamic - elf_machine_load_address() ;
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}
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#else /* __PCREL__ */
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/* In PCREL mode, r2 may have been clobbered. Rely on relative
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relocations instead. */
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static inline ElfW(Addr)
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elf_machine_load_address (void)
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{
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extern const ElfW(Ehdr) __ehdr_start attribute_hidden;
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return (ElfW(Addr)) &__ehdr_start;
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}
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static inline ElfW(Addr)
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elf_machine_dynamic (void)
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{
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extern ElfW(Dyn) _DYNAMIC[] attribute_hidden;
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return (ElfW(Addr)) _DYNAMIC - elf_machine_load_address ();
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}
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#endif /* __PCREL__ */
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/* The PLT uses Elf64_Rela relocs. */
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#define elf_machine_relplt elf_machine_rela
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