Commit: 01961b12bc71d6eb4d9bda3632d73bb6764b8e85 - uclibc-ng (git)

Commit MetaInfo

• Revision: 01961b12bc71d6eb4d9bda3632d73bb6764b8e85 (tree)
• Zeit: 2022-07-20 18:47:17
• Autor: Vladimir Murzin <vladimir.murzin@arm....>
• Commiter: Waldemar Brodkorb

Log Message

linuxthread/arm: Unlock ldrex/strex varsion of testandset for ARM_ARCH >= 7

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 <[e-mail]>
Signed-off-by: Vladimir Murzin <[e-mail]>

Ändern Zusammenfassung

• modified: libpthread/linuxthreads/sysdeps/arm/pt-machine.h

Diff

--- 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)