[klibc] [PATCH klibc 1/3] Revert " Kbuild: Tell gas we don't want executable stacks"
Ben Hutchings
ben at decadent.org.uk
Wed Apr 29 15:01:59 PDT 2020
This reverts commit 9d8d648e604026b32cad00a84ed6c29cbd157641, which
broke signal handing on some architectures.
On m68k and parisc, signal return depends on a trampoline that the
kernel writes on the stack. On alpha, s390, and sparc (32-bit), we
can avoid this by providing our own function as sa_restorer, but we
currently don't.
Signed-off-by: Ben Hutchings <ben at decadent.org.uk>
---
scripts/Kbuild.klibc | 2 +-
usr/klibc/Kbuild | 1 -
2 files changed, 1 insertion(+), 2 deletions(-)
diff --git a/scripts/Kbuild.klibc b/scripts/Kbuild.klibc
index afc9a546..b7e99b56 100644
--- a/scripts/Kbuild.klibc
+++ b/scripts/Kbuild.klibc
@@ -125,7 +125,7 @@ KLIBCDEFS += -D__KLIBC__=$(KLIBCMAJOR) \
KLIBCCPPFLAGS += $(KLIBCDEFS)
KLIBCCFLAGS += $(KLIBCCPPFLAGS) $(KLIBCREQFLAGS) $(KLIBCARCHREQFLAGS) \
$(KLIBCOPTFLAGS) $(KLIBCWARNFLAGS)
-KLIBCAFLAGS += -D__ASSEMBLY__ -Wa,--noexecstack $(KLIBCCFLAGS)
+KLIBCAFLAGS += -D__ASSEMBLY__ $(KLIBCCFLAGS)
KLIBCSTRIPFLAGS += --strip-all -R .comment -R .note
KLIBCLIBGCC_DEF := $(shell $(KLIBCCC) $(KLIBCCFLAGS) --print-libgcc)
diff --git a/usr/klibc/Kbuild b/usr/klibc/Kbuild
index 24bad07d..bec9cdb4 100644
--- a/usr/klibc/Kbuild
+++ b/usr/klibc/Kbuild
@@ -185,7 +185,6 @@ quiet_cmd_interp = BUILD $@
cmd_interp = $(KLIBCCC) $(klibccflags) -D__ASSEMBLY__ \
-DLIBDIR=\"$(SHLIBDIR)\" \
-DSOHASH=\"$(SOLIBHASH)\" \
- -Wa,--noexecstack \
-c -o $@ $<
$(INTERP_O): $(obj)/interp.S $(SOLIB).hash
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