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ARM: Rewrite elf_machine_dynamic in pure C.
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@ -1,3 +1,8 @@
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2013-05-07 Roland McGrath <roland@hack.frob.com>
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* sysdeps/arm/dl-machine.h (elf_machine_dynamic): Use a plain C
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reference to _GLOBAL_OFFSET_TABLE_ with an STV_HIDDEN declaration.
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2013-05-06 Roland McGrath <roland@hack.frob.com>
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* sysdeps/arm/dl-tlsdesc.S (_dl_tlsdesc_dynamic): Add missing sfi_breg.
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@ -39,30 +39,13 @@ elf_machine_matches_host (const Elf32_Ehdr *ehdr)
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/* Return the link-time address of _DYNAMIC. Conveniently, this is the
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first element of the GOT. We used to use the PIC register to do this
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without a constant pool reference, but GCC 4.2 will use a pseudo-register
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for the PIC base, so it may not be in r10. */
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first element of the GOT. */
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static inline Elf32_Addr __attribute__ ((unused))
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elf_machine_dynamic (void)
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{
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Elf32_Addr dynamic;
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#ifdef __thumb2__
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long tmp;
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asm ("ldr\t%0, 1f\n\t"
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"adr\t%1, 1f\n\t"
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"ldr\t%0, [%0, %1]\n\t"
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"b 2f\n"
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".align 2\n"
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"1: .word _GLOBAL_OFFSET_TABLE_ - 1b\n"
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"2:" : "=r" (dynamic), "=r"(tmp));
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#else
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asm ("ldr %0, 2f\n"
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"1: ldr %0, [pc, %0]\n"
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"b 3f\n"
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"2: .word _GLOBAL_OFFSET_TABLE_ - (1b+8)\n"
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"3:" : "=r" (dynamic));
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#endif
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return dynamic;
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/* Declaring this hidden ensures that a PC-relative reference is used. */
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extern const Elf32_Addr _GLOBAL_OFFSET_TABLE_[] attribute_hidden;
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return _GLOBAL_OFFSET_TABLE_[0];
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}
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