binutils-gdb/ld/testsuite/ld-powerpc/tlsld.s

 .section ".opd","aw",@progbits
 .p2align 3
 .globl _start
_start:
 .quad .L_start,.TOC.@tocbase,0

 .text
.L_start:
 addis 3,2,PrettyStackTraceHead@got@tlsld@ha
 addi 29,3,PrettyStackTraceHead@got@tlsld@l
 mr 3,29
 bl __tls_get_addr(PrettyStackTraceHead@tlsld)
 nop
 addis 3,3,PrettyStackTraceHead@dtprel@ha
 ld 3,PrettyStackTraceHead@dtprel@l(3)
 nop

 addi 29,2,PrettyStackTraceHead@got@tlsld
 mr 3,29
 bl __tls_get_addr(PrettyStackTraceHead@tlsld)
 nop
 ld 3,PrettyStackTraceHead@dtprel(3)
 nop
 nop
 nop

 addis 3,2,PrettyStackTraceHead@got@tlsgd@ha
 addi 29,3,PrettyStackTraceHead@got@tlsgd@l
 mr 3,29
 bl __tls_get_addr(PrettyStackTraceHead@tlsgd)
 nop
 ld 3,0(3)
 nop
 nop

 addi 29,2,PrettyStackTraceHead@got@tlsgd
 mr 3,29
 bl __tls_get_addr(PrettyStackTraceHead@tlsgd)
 nop
 ld 3,0(3)
 nop
 nop
 nop

 .section ".tbss","awT",@nobits
 .align 3
PrettyStackTraceHead:
 .space 8
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			`.section ".opd","aw",@progbits`
			`.p2align 3`
			`.globl _start`
			`_start:`
			`.quad .L_start,.TOC.@tocbase,0`

			`.text`
			`.L_start:`
			`addis 3,2,PrettyStackTraceHead@got@tlsld@ha`
			`addi 29,3,PrettyStackTraceHead@got@tlsld@l`
			`mr 3,29`
			`bl __tls_get_addr(PrettyStackTraceHead@tlsld)`
			`nop`
			`addis 3,3,PrettyStackTraceHead@dtprel@ha`
			`ld 3,PrettyStackTraceHead@dtprel@l(3)`
			`nop`

			`addi 29,2,PrettyStackTraceHead@got@tlsld`
			`mr 3,29`
			`bl __tls_get_addr(PrettyStackTraceHead@tlsld)`
			`nop`
			`ld 3,PrettyStackTraceHead@dtprel(3)`
			`nop`
			`nop`
			`nop`

			`addis 3,2,PrettyStackTraceHead@got@tlsgd@ha`
			`addi 29,3,PrettyStackTraceHead@got@tlsgd@l`
			`mr 3,29`
			`bl __tls_get_addr(PrettyStackTraceHead@tlsgd)`
			`nop`
			`ld 3,0(3)`
			`nop`
			`nop`

			`addi 29,2,PrettyStackTraceHead@got@tlsgd`
			`mr 3,29`
			`bl __tls_get_addr(PrettyStackTraceHead@tlsgd)`
			`nop`
			`ld 3,0(3)`
			`nop`
			`nop`
			`nop`

			`.section ".tbss","awT",@nobits`
			`.align 3`
			`PrettyStackTraceHead:`
			`.space 8`