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xtensa: add __bswap{si,di}2 helpers

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gcc-13 may generate calls for __bswap{si,di}2. This breaks the kernel
build when optimization for size is selected. Add __bswap{si,di}2
helpers to fix that.

Cc: stable@vger.kernel.org
Fixes: 19c5699f9a ("xtensa: don't link with libgcc")
Signed-off-by: Max Filippov <jcmvbkbc@gmail.com>
This commit is contained in:
Max Filippov 2023-05-06 17:10:36 -07:00
parent 9c2cc74fb3
commit 034f4a7877
4 changed files with 42 additions and 1 deletions
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4
arch/xtensa/kernel/xtensa_ksyms.c
View file

@ -56,6 +56,8 @@ EXPORT_SYMBOL(empty_zero_page);
*/
extern long long __ashrdi3(long long, int);
extern long long __ashldi3(long long, int);
extern long long __bswapdi2(long long);
extern int __bswapsi2(int);
extern long long __lshrdi3(long long, int);
extern int __divsi3(int, int);
extern int __modsi3(int, int);
@ -66,6 +68,8 @@ extern unsigned long long __umulsidi3(unsigned int, unsigned int);
EXPORT_SYMBOL(__ashldi3);
EXPORT_SYMBOL(__ashrdi3);
EXPORT_SYMBOL(__bswapdi2);
EXPORT_SYMBOL(__bswapsi2);
EXPORT_SYMBOL(__lshrdi3);
EXPORT_SYMBOL(__divsi3);
EXPORT_SYMBOL(__modsi3);

2
arch/xtensa/lib/Makefile
View file

@ -4,7 +4,7 @@
#
lib-y += memcopy.o memset.o checksum.o \
ashldi3.o ashrdi3.o lshrdi3.o \
ashldi3.o ashrdi3.o bswapdi2.o bswapsi2.o lshrdi3.o \
divsi3.o udivsi3.o modsi3.o umodsi3.o mulsi3.o umulsidi3.o \
usercopy.o strncpy_user.o strnlen_user.o
lib-$(CONFIG_PCI) += pci-auto.o

21
arch/xtensa/lib/bswapdi2.S Normal file
View file

@ -0,0 +1,21 @@
/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
#include <linux/linkage.h>
#include <asm/asmmacro.h>
#include <asm/core.h>
ENTRY(__bswapdi2)
abi_entry_default
ssai 8
srli a4, a2, 16
src a4, a4, a2
src a4, a4, a4
src a4, a2, a4
srli a2, a3, 16
src a2, a2, a3
src a2, a2, a2
src a2, a3, a2
mov a3, a4
abi_ret_default
ENDPROC(__bswapdi2)

16
arch/xtensa/lib/bswapsi2.S Normal file
View file

@ -0,0 +1,16 @@
/* SPDX-License-Identifier: GPL-2.0-or-later WITH GCC-exception-2.0 */
#include <linux/linkage.h>
#include <asm/asmmacro.h>
#include <asm/core.h>
ENTRY(__bswapsi2)
abi_entry_default
ssai 8
srli a3, a2, 16
src a3, a3, a2
src a3, a3, a3
src a2, a2, a3
abi_ret_default
ENDPROC(__bswapsi2)