mirror of
https://sourceware.org/git/binutils-gdb.git
synced 2024-12-21 04:42:53 +08:00
b86ac8e3a5
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.
45 lines
614 B
Makefile
45 lines
614 B
Makefile
#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
|