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| author | Joseph Myers <joseph@codesourcery.com> | 2017-09-26 17:35:53 +0100 |
|---|---|---|
| committer | Joseph Myers <jsm28@gcc.gnu.org> | 2017-09-26 17:35:53 +0100 |
| commit | 938b6f1e5d31c8c3ef4dd1dd4d6b65b3f53ad07d (patch) | |
| tree | ee16574d02eab6903c55199d5f7d94c9e4221315 /gcc/tree-sra.c | |
| parent | ca617fd2144dd58a2d26887239e86e5b32eba87c (diff) | |
| download | gcc-938b6f1e5d31c8c3ef4dd1dd4d6b65b3f53ad07d.zip gcc-938b6f1e5d31c8c3ef4dd1dd4d6b65b3f53ad07d.tar.gz gcc-938b6f1e5d31c8c3ef4dd1dd4d6b65b3f53ad07d.tar.bz2 | |
Enable no-exec stacks for more targets using the Linux kernel.
Building glibc for many different configurations and running the
compilation parts of the testsuite runs into failures of the
elf/check-execstack test for hppa and microblaze. Those
configurations default to executable stacks in the Linux kernel
because of VM_DATA_DEFAULT_FLAGS definitions including VM_EXEC
(VM_DATA_DEFAULT_FLAGS being the default definition of
VM_STACK_DEFAULT_FLAGS).
This fails because those configurations are not generating
.note.GNU-stack sections to indicate that programs do not need an
executable stack. This patch fixes GCC to generate those sections on
those architectures (when configured for a target using the Linux
kernel), as it does on other architectures, together with adding that
section to libgcc .S sources, with the same code as used on other
architectures (or a variant using "#ifdef __linux__" instead of the
usual "#if defined(__ELF__) && defined(__linux__)" for microblaze, as
that configuration doesn't use elfos.h and so doesn't define __ELF__).
This suffices to eliminate that glibc test failure. (For hppa, the
compilation parts of the glibc testsuite still fail because of the
separate elf/check-textrel failure.)
gcc:
* config/microblaze/linux.h (TARGET_ASM_FILE_END): Likewise.
* config/pa/pa.h (NEED_INDICATE_EXEC_STACK): Likewise.
* config/pa/pa-linux.h (NEED_INDICATE_EXEC_STACK): Likewise.
* config/pa/pa.c (pa_hpux_file_end): Rename to pa_file_end.
Define unconditionally, with [ASM_OUTPUT_EXTERNAL_REAL]
conditionals inside the function instead of around it. Call
file_end_indicate_exec_stack if NEED_INDICATE_EXEC_STACK.
(TARGET_ASM_FILE_END): Define unconditionally to pa_file_end.
libgcc:
* config/microblaze/crti.S, config/microblaze/crtn.S,
config/microblaze/divsi3.S, config/microblaze/moddi3.S,
config/microblaze/modsi3.S, config/microblaze/muldi3_hard.S,
config/microblaze/mulsi3.S,
config/microblaze/stack_overflow_exit.S,
config/microblaze/udivsi3.S, config/microblaze/umodsi3.S,
config/pa/milli64.S: Add .note.GNU-stack section.
From-SVN: r253204
Diffstat (limited to 'gcc/tree-sra.c')
0 files changed, 0 insertions, 0 deletions