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binutils-gdb/ld/testsuite/ld-powerpc/tlsld32.d

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Correct PowerPC64 local-dynamic TLS linker optimization The linker hardcoded r3 into a local-dynamic to local-exec TLS optimization sequence. This is normally the case since r3 is required as a parameter to (the optimized out) __tls_get_addr call. However, it is possible for a compiler, LLVM in this case, to set up the parameter value in another register then copy it to r3 before the call. When fixing this problem, I noticed that ppc32 had another bug when optimizing away one of the TLS insns to a nop. The patch also tidies a mask used by global-dynamic to initial-exec TLS optimization, to just select the fields needed. Leaving the offset in the instruction wasn't a bug since it will be overwritten anyway. bfd/ * elf64-ppc.c (ppc64_elf_relocate_section): Correct GOT_TLSLD optimization. Tidy mask for GOT_TLSGD optimization. * elf32-ppc.c (ppc_elf_relocate_section): Likewise. Correct location of nop zapping high insn too. ld/testsuite/ * ld-powerpc/tlsld.d, * ld-powerpc/tlsld.s: New test. * ld-powerpc/tlsld32.d, * ld-powerpc/tlsld32.s: New test. * ld-powerpc/powerpc.exp: Run them. Move tocvar and tocnovar.
2015-01-29 08:39:55 +08:00
#source: tlsld32.s
#as: -a32
#ld: -melf32ppc
#objdump: -dr
#target: powerpc*-*-*
.*: file format .*
Disassembly of section \.text:
.*:
.* nop
.* addis r29,r2,0
.* mr r3,r29
.* addi r3,r3,4096
.* addis r3,r3,0
.* lwz r3,-32768\(r3\)
.* nop
.* nop
.* addis r29,r2,0
.* mr r3,r29
.* addi r3,r3,4096
.* lwz r3,-32768\(r3\)
.* nop
.* nop
.* nop
.* nop
.* nop
.* addis r29,r2,0
.* mr r3,r29
.* addi r3,r3,-28672
.* lwz r3,0\(r3\)
.* nop
.* nop
.* nop
.* addis r29,r2,0
.* mr r3,r29
.* addi r3,r3,-28672
.* lwz r3,0\(r3\)
.* nop
.* nop
.* nop
.* nop
#pass
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