David Gow bd71558d58 arch: um: Mark the stack non-executable to fix a binutils warning ... Since binutils 2.39, ld will print a warning if any stack section is executable, which is the default for stack sections on files without a .note.GNU-stack section. This was fixed for x86 in commit ffcf9c5700 ("x86: link vdso and boot with -z noexecstack --no-warn-rwx-segments"), but remained broken for UML, resulting in several warnings: /usr/bin/ld: warning: arch/x86/um/vdso/vdso.o: missing .note.GNU-stack section implies executable stack /usr/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker /usr/bin/ld: warning: .tmp_vmlinux.kallsyms1 has a LOAD segment with RWX permissions /usr/bin/ld: warning: .tmp_vmlinux.kallsyms1.o: missing .note.GNU-stack section implies executable stack /usr/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker /usr/bin/ld: warning: .tmp_vmlinux.kallsyms2 has a LOAD segment with RWX permissions /usr/bin/ld: warning: .tmp_vmlinux.kallsyms2.o: missing .note.GNU-stack section implies executable stack /usr/bin/ld: NOTE: This behaviour is deprecated and will be removed in a future version of the linker /usr/bin/ld: warning: vmlinux has a LOAD segment with RWX permissions Link both the VDSO and vmlinux with -z noexecstack, fixing the warnings about .note.GNU-stack sections. In addition, pass --no-warn-rwx-segments to dodge the remaining warnings about LOAD segments with RWX permissions in the kallsyms objects. (Note that this flag is apparently not available on lld, so hide it behind a test for BFD, which is what the x86 patch does.) Link: https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ffcf9c5700e49c0aee42dcba9a12ba21338e8136 Link: https://sourceware.org/git/?p=binutils-gdb.git;a=commit;h=ba951afb99912da01a6e8434126b8fac7aa75107 Signed-off-by: David Gow <davidgow@google.com> Reviewed-by: Lukas Straub <lukasstraub2@web.de> Tested-by: Lukas Straub <lukasstraub2@web.de> Acked-by: Randy Dunlap <rdunlap@infradead.org> # build-tested Signed-off-by: Richard Weinberger <richard@nod.at>		2022-09-21 09:11:42 +02:00
..
asm	…
os-Linux	…
shared/sysdep	um: Cleanup syscall_handler_t cast in syscalls_32.h	2022-09-19 21:58:53 +02:00
vdso	arch: um: Mark the stack non-executable to fix a binutils warning	2022-09-21 09:11:42 +02:00
Kconfig	x86/um: Kconfig: Fix indentation	2022-07-17 23:13:24 +02:00
Makefile	Misc fixes:	2022-08-06 17:45:37 -07:00
bugs_32.c	…
bugs_64.c	…
checksum_32.S	…
delay.c	…
elfcore.c	…
fault.c	…
ldt.c	um: Fix out-of-bounds read in LDT setup	2022-05-27 09:03:41 +02:00
mem_32.c	um/mm: enable ARCH_HAS_VM_GET_PAGE_PROT	2022-07-17 17:14:41 -07:00
mem_64.c	…
ptrace_32.c	…
ptrace_64.c	…
ptrace_user.c	…
setjmp_32.S	…
setjmp_64.S	…
signal.c	…
stub_32.S	…
stub_64.S	…
stub_segv.c	…
sys_call_table_32.c	…
sys_call_table_64.c	…
syscalls_32.c	…
syscalls_64.c	um: Remove duplicated include in syscalls_64.c	2022-03-11 10:41:08 +01:00
sysrq_32.c	…
sysrq_64.c	um: x86: print RIP with symbol	2022-07-17 23:15:21 +02:00
tls_32.c	um: Cleanup compiler warning in arch/x86/um/tls_32.c	2022-09-19 21:59:47 +02:00
tls_64.c	…
user-offsets.c	um: Allow builds with Clang	2022-03-21 08:13:03 -07:00