Thomas has repored failure building ARM 32-bit systems for ARMv8 cores
CC libpthread/linuxthreads/mutex.os
/tmp/ccn8SFKU.s: Assembler messages:
/tmp/ccn8SFKU.s:162: Error: swp{b} use is obsoleted for ARMv8 and later
/tmp/ccn8SFKU.s:186: Error: swp{b} use is obsoleted for ARMv8 and later
/tmp/ccn8SFKU.s:203: Error: swp{b} use is obsoleted for ARMv8 and later
/tmp/ccn8SFKU.s:224: Error: swp{b} use is obsoleted for ARMv8 and later
make[1]: *** [Makerules:369: libpthread/linuxthreads/mutex.os] Error 1
This is due to libpthread/linuxthreads/sysdeps/arm/pt-machine.h which
uses the swp instruction that is not allowed on ARMv8.
All __ARM_ARCH >= 7 support ldrex/strex instructions, so unlock
testandset() varaint for them.
Reported-by: Thomas Petazzoni <thomas.petazz...@bootlin.com>
Signed-off-by: Vladimir Murzin <vladimir.mur...@arm.com>
---
libpthread/linuxthreads/sysdeps/arm/pt-machine.h | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/libpthread/linuxthreads/sysdeps/arm/pt-machine.h
b/libpthread/linuxthreads/sysdeps/arm/pt-machine.h
index b00b10495..3250961cf 100644
--- a/libpthread/linuxthreads/sysdeps/arm/pt-machine.h
+++ b/libpthread/linuxthreads/sysdeps/arm/pt-machine.h
@@ -28,7 +28,7 @@
# define PT_EI __extern_always_inline
#endif
-#if defined(__thumb2__)
+#if __ARM_ARCH >= 7 || defined(__thumb2__)
/* Spinlock implementation; required. */
PT_EI long int
testandset (int *spinlock)
--
2.25.1
_______________________________________________
devel mailing list -- devel@uclibc-ng.org
To unsubscribe send an email to devel-le...@uclibc-ng.org
