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OpenCloudOS-Kernel/arch/xtensa/kernel/mcount.S

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xtensa: add static function tracer support Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2013-05-24 11:02:25 +08:00
/*
* arch/xtensa/kernel/mcount.S
*
* Xtensa specific mcount support
*
* This file is subject to the terms and conditions of the GNU General Public
* License. See the file "COPYING" in the main directory of this archive
* for more details.
*
* Copyright (C) 2013 Tensilica Inc.
*/
#include <linux/linkage.h>
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>
2019-05-13 11:28:25 +08:00
#include <asm/asmmacro.h>
xtensa: add static function tracer support Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2013-05-24 11:02:25 +08:00
#include <asm/ftrace.h>
/*
* Entry condition:
*
* a2: a0 of the caller
*/
ENTRY(_mcount)
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>
2019-05-13 11:28:25 +08:00
abi_entry_default
xtensa: add static function tracer support Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2013-05-24 11:02:25 +08:00
movi a4, ftrace_trace_function
l32i a4, a4, 0
movi a3, ftrace_stub
bne a3, a4, 1f
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>
2019-05-13 11:28:25 +08:00
abi_ret_default
xtensa: add static function tracer support Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2013-05-24 11:02:25 +08:00
1: xor a7, a2, a1
movi a3, 0x3fffffff
and a7, a7, a3
xor a7, a7, a1
xor a6, a0, a1
and a6, a6, a3
xor a6, a6, a1
addi a6, a6, -MCOUNT_INSN_SIZE
callx4 a4
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>
2019-05-13 11:28:25 +08:00
abi_ret_default
xtensa: add static function tracer support Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2013-05-24 11:02:25 +08:00
ENDPROC(_mcount)
ENTRY(ftrace_stub)
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>
2019-05-13 11:28:25 +08:00
abi_entry_default
abi_ret_default
xtensa: add static function tracer support Signed-off-by: Max Filippov <jcmvbkbc@gmail.com> Signed-off-by: Chris Zankel <chris@zankel.net>
2013-05-24 11:02:25 +08:00
ENDPROC(ftrace_stub)