The PowerPC port should define math_opt_barrier and math_force_eval in sysdeps/powerpc/fpu/math_private.h to override the default definitions that force a write to memory.
Patch submitted: https://patchwork.sourceware.org/patch/23084/
This is an automated email from the git hooks/post-receive script. It was generated because a ref change was pushed to the repository containing the project "GNU C Library master sources". The branch, master has been updated via 8644588807215ab09716ac04a150f91ac83acffd (commit) via e8dbd6a36d8e4d30e736e28a364f7a4d1404079a (commit) via 179dcdb7af4983fd42824db748ee6cb05f8d71cf (commit) from 006e766437033d6565133ce356b55d7b301a7b58 (commit) Those revisions listed above that are new to this repository have not appeared on any other notification email; so we list those revisions in full, below. - Log ----------------------------------------------------------------- https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=8644588807215ab09716ac04a150f91ac83acffd commit 8644588807215ab09716ac04a150f91ac83acffd Author: James Clarke <jrtc27@jrtc27.com> Date: Fri Oct 13 15:44:39 2017 -0300 Fix TLS relocations against local symbols on powerpc32, sparc32 and sparc64 Normally, TLS relocations against local symbols are optimised by the linker to be absolute. However, gold does not do this, and so it is possible to end up with, for example, R_SPARC_TLS_DTPMOD64 referring to a local symbol. Since sym_map is left as null in elf_machine_rela for the special local symbol case, the relocation handling thinks it has nothing to do, and so the module gets left as 0. Havoc then ensues when the variable in question is accessed. Before this fix, the main_local_gold program would receive a SIGBUS on sparc64, and SIGSEGV on powerpc32. With this fix applied, that test now passes like the rest of them. * sysdeps/powerpc/powerpc32/dl-machine.h (elf_machine_rela): Assign sym_map to be map for local symbols, as TLS relocations use sym_map to determine whether the symbol is defined and to extract the TLS information. * sysdeps/sparc/sparc32/dl-machine.h (elf_machine_rela): Likewise. * sysdeps/sparc/sparc64/dl-machine.h (elf_machine_rela): Likewise. https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=e8dbd6a36d8e4d30e736e28a364f7a4d1404079a commit e8dbd6a36d8e4d30e736e28a364f7a4d1404079a Author: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> Date: Fri Oct 13 15:44:39 2017 -0300 powerpc: Avoid putting floating point values in memory [BZ #22189] [BZ #22189] * sysdeps/powerpc/fpu/math_private.h (math_opt_barrier): (math_force_eval): Add powerpc version. https://sourceware.org/git/gitweb.cgi?p=glibc.git;h=179dcdb7af4983fd42824db748ee6cb05f8d71cf commit 179dcdb7af4983fd42824db748ee6cb05f8d71cf Author: Tulio Magno Quites Machado Filho <tuliom@linux.vnet.ibm.com> Date: Fri Oct 13 15:44:39 2017 -0300 [BZ #22142] powerpc: Fix the carry bit on mpn_[add|sub]_n on POWER7 Fix the ifdef clause that was being used in the opposite way, setting a wrong value of the carry bit. This is also correcting 2 memory accesses that were mistakenly referring to r0 while they were supposed to mean the immediate value 0. [BZ #22142] * stdio-common/tst-printf.c (fp_test): Add tests for DBL_MAX and -DBL_MAX. (do_test): Likewise. * stdio-common/tst-printf.sh: Likewise. * sysdeps/powerpc/powerpc64/power7/add_n.S: Invert the initial ifdef clause in order to set the carry bit right. Replace r0 by 0 without changing the behavior. ----------------------------------------------------------------------- Summary of changes: ChangeLog | 24 ++++++++++++++++++++++++ stdio-common/tst-printf.c | 4 ++++ stdio-common/tst-printf.sh | 8 ++++++++ sysdeps/powerpc/fpu/math_private.h | 7 +++++++ sysdeps/powerpc/powerpc32/dl-machine.h | 5 ++++- sysdeps/powerpc/powerpc64/power7/add_n.S | 8 ++++---- sysdeps/sparc/sparc32/dl-machine.h | 1 + sysdeps/sparc/sparc64/dl-machine.h | 1 + 8 files changed, 53 insertions(+), 5 deletions(-)
Fixed in glibc 2.27.