diff options
| author | Max Filippov <jcmvbkbc@gmail.com> | 2015-09-16 01:49:49 +0300 |
|---|---|---|
| committer | Waldemar Brodkorb <wbx@openadk.org> | 2015-10-08 20:31:24 +0200 |
| commit | e78a0f58f23347c822c182d1c01f6eb9b9866d60 (patch) | |
| tree | 723cfbcd2411d889fb4956adb7f2d11a6d766050 /libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S | |
| parent | 9fae2ad9937279c9f7f40975ac14cb7b57f4a36d (diff) | |
xtensa: support call0 ABI
Most changes are mechanical replacement of 'retw' instruction with
'abi_ret' macro, defined to 'retw' or 'ret' according to ABI.
Assembly code that makes calls is duplicated for call0 ABI with changed
register numbers for parameters/return value and call instruction.
'entry' instructions are replaced with 'abi_entry' macro.
More interesting changes:
- non-leaf assembly functions (e.g. _dl_tlsdesc_dynamic,
_dl_linux_resolve, SYSCALL_ERROR_HANDLER, PSEUDO) now need to preserve
registers around intermediate calls they make, use temporary stack
frame for that;
- setjmp/longjmp only need to save and restore return address, stack
pointer and callee-saved registers in the jmpbuf;
- __clone and syscall functions had hardcoded offsets to parameter
passed on stack, on call0 ABI they don't need stack frame, so the
offset is different. Replace these offsets with FRAMESIZE macro.
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Diffstat (limited to 'libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S')
| -rw-r--r-- | libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S | 14 |
1 files changed, 5 insertions, 9 deletions
diff --git a/libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S b/libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S index 1e220a863..10b1c00f5 100644 --- a/libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S +++ b/libpthread/nptl/sysdeps/xtensa/pthread_spin_lock.S @@ -16,13 +16,10 @@ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA. */ - .text - .align 4 - - .globl pthread_spin_lock -pthread_spin_lock: +#include <sysdep.h> - entry a1, 16 + .text +ENTRY (pthread_spin_lock) movi a3, 0 wsr a3, scompare1 @@ -31,7 +28,6 @@ pthread_spin_lock: bnez a3, 1b movi a2, 0 - retw + abi_ret - .type pthread_spin_lock, @function - .size pthread_spin_lock, .-pthread_spin_lock +END (pthread_spin_lock) |