diff options
authorRich Felker <>2017-02-15 17:05:50 -0500
committerRich Felker <>2017-02-15 17:50:47 -0500
commitb261a24256792177a5f0531dbb25cc6267220ca5 (patch)
parent9201c3afce0ff53a9b1c5da5285ff84c11dee9d4 (diff)
fix build regression in arm atomics asm with new binutils
binutils commit bada43421274615d0d5f629a61a60b7daa71bc15 tightened immediate fixup handling in gas in such a way that the final .arch of an object file must be compatible with the fixups used when the instruction was assembled; this in turn broke assembling of atomics.s, at least in thumb mode. it's not clear whether this should be considered a bug in gas, but .object_arch is preferable anyway for our purpose here of controlling the ISA level tag on the object file being produced, and it's the intended directive for use in object files with runtime code selection. research by Szabolcs Nagy confirmed that .object_arch is supported in all relevant versions of binutils and clang's integrated assembler. patch by Reiner Herrmann.
1 files changed, 1 insertions, 1 deletions
diff --git a/src/thread/arm/atomics.s b/src/thread/arm/atomics.s
index 202faa4a..101ad391 100644
--- a/src/thread/arm/atomics.s
+++ b/src/thread/arm/atomics.s
@@ -84,7 +84,7 @@ __a_gettp_cp15:
bx lr
/* Tag this file with minimum ISA level so as not to affect linking. */
-.arch armv4t
+.object_arch armv4t
.eabi_attribute 6,2