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| author | Vladimir Murzin <vladimir.murzin@arm.com> | 2022-07-18 12:57:24 +0100 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2022-07-20 11:47:17 +0200 |
| commit | 01961b12bc71d6eb4d9bda3632d73bb6764b8e85 (patch) | |
| tree | 621ddba67fecbb149e1b5186bbd9baab78986432 /libc/sysdeps/linux/common/bits/mathinline.h | |
| parent | a13b4d8aabe9b525fa280f4a240e89d991d7f106 (diff) | |
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 <thomas.petazzoni@bootlin.com>
Signed-off-by: Vladimir Murzin <vladimir.murzin@arm.com>
Diffstat (limited to 'libc/sysdeps/linux/common/bits/mathinline.h')
0 files changed, 0 insertions, 0 deletions