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3 commits

Author SHA1 Message Date
Max Filippov
0b5372570b xtensa: implement call0 ABI support in assembly 
Replace hardcoded register and opcode names with ABI-agnostic macros.
Add register save/restore code where necessary. Conditionalize windowed
only or call0 only code. Add stack initialization matching _switch_to
epilogue to copy_thread.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
 2021-10-18 22:19:35 -07:00
Max Filippov
d6d5f19e21 xtensa: abstract 'entry' and 'retw' in assembly code 
Provide abi_entry, abi_entry_default, abi_ret and abi_ret_default macros
that allocate aligned stack frame in windowed and call0 ABIs.
Provide XTENSA_SPILL_STACK_RESERVE macro that specifies required stack
frame size when register spilling is involved.
Replace all uses of 'entry' and 'retw' with the above macros.
This makes most of the xtensa assembly code ready for XEA3 and call0 ABI.

Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
 2019-07-08 10:04:48 -07:00
Max Filippov
478ba61afc xtensa: add static function tracer support 
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
Signed-off-by: Chris Zankel <chris@zankel.net>
 2013-07-08 01:18:57 -07:00