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| author | Max Filippov <jcmvbkbc@gmail.com> | 2019-05-13 06:28:25 +0300 |
|---|---|---|
| committer | Max Filippov <jcmvbkbc@gmail.com> | 2019-07-08 20:04:48 +0300 |
| commit | d6d5f19e21d98c0607ff029e4e2e508d4cdd1d5a (patch) | |
| tree | 1780d36ac99c16f8ed506948a020017e84a89a9f /arch/xtensa/lib/strnlen_user.S | |
| parent | 831c4f3da83e260df943dfb982d77cef5cba2c49 (diff) | |
| download | linux-d6d5f19e21d98c0607ff029e4e2e508d4cdd1d5a.tar.xz | |
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>
Diffstat (limited to 'arch/xtensa/lib/strnlen_user.S')
| -rw-r--r-- | arch/xtensa/lib/strnlen_user.S | 14 |
1 files changed, 7 insertions, 7 deletions
diff --git a/arch/xtensa/lib/strnlen_user.S b/arch/xtensa/lib/strnlen_user.S index 1f2ca2bb2ab3..3d391dca3efb 100644 --- a/arch/xtensa/lib/strnlen_user.S +++ b/arch/xtensa/lib/strnlen_user.S @@ -45,7 +45,7 @@ .text ENTRY(__strnlen_user) - entry sp, 16 # minimal stack frame + abi_entry_default # a2/ s, a3/ len addi a4, a2, -4 # because we overincrement at the end; # we compensate with load offsets of 4 @@ -96,7 +96,7 @@ EX(10f) l32i a9, a4, 4 # load 4 bytes for remaining checks addi a4, a4, 1 # advance string pointer .L101: sub a2, a4, a2 # compute length - retw + abi_ret_default # NOTE that in several places below, we point to the byte just after # the zero byte in order to include the NULL terminator in the count. @@ -106,15 +106,15 @@ EX(10f) l32i a9, a4, 4 # load 4 bytes for remaining checks .Lz0: # byte 0 is zero addi a4, a4, 1 # point just beyond zero byte sub a2, a4, a2 # subtract to get length - retw + abi_ret_default .Lz1: # byte 1 is zero addi a4, a4, 1+1 # point just beyond zero byte sub a2, a4, a2 # subtract to get length - retw + abi_ret_default .Lz2: # byte 2 is zero addi a4, a4, 2+1 # point just beyond zero byte sub a2, a4, a2 # subtract to get length - retw + abi_ret_default .L1mod2: # address is odd EX(10f) l8ui a9, a4, 4 # get byte 0 @@ -130,7 +130,7 @@ EX(10f) l32i a9, a4, 0 # get word with first two bytes of string # byte 3 is zero addi a4, a4, 3+1 # point just beyond zero byte sub a2, a4, a2 # subtract to get length - retw + abi_ret_default ENDPROC(__strnlen_user) @@ -138,4 +138,4 @@ ENDPROC(__strnlen_user) .align 4 10: movi a2, 0 - retw + abi_ret_default |