diff options
| author | Nick Desaulniers <ndesaulniers@google.com> | 2022-10-18 22:50:59 +0300 |
|---|---|---|
| committer | Russell King (Oracle) <rmk+kernel@armlinux.org.uk> | 2022-11-07 17:19:03 +0300 |
| commit | 527d08631b30fb99721274eab8ebabd9c54b0b25 (patch) | |
| tree | 8d3c400ca707b85aa4ff9ef514f9244e7abdbc29 | |
| parent | 8fc0b333a7dd9b98040096296ba591a3ac3e12c0 (diff) | |
| download | linux-527d08631b30fb99721274eab8ebabd9c54b0b25.tar.xz | |
ARM: 9260/1: lib/xor: use r10 rather than r7 in xor_arm4regs_{2|3}
kbuild test robot reports:
In file included from crypto/xor.c:17:
./arch/arm/include/asm/xor.h:61:3: error: write to reserved register 'R7'
GET_BLOCK_4(p1);
^
./arch/arm/include/asm/xor.h:20:10: note: expanded from macro 'GET_BLOCK_4'
__asm__("ldmia %0, {%1, %2, %3, %4}"
^
./arch/arm/include/asm/xor.h:63:3: error: write to reserved register 'R7'
PUT_BLOCK_4(p1);
^
./arch/arm/include/asm/xor.h:42:23: note: expanded from macro 'PUT_BLOCK_4'
__asm__ __volatile__("stmia %0!, {%2, %3, %4, %5}"
^
./arch/arm/include/asm/xor.h:83:3: error: write to reserved register 'R7'
GET_BLOCK_4(p1);
^
./arch/arm/include/asm/xor.h:20:10: note: expanded from macro 'GET_BLOCK_4'
__asm__("ldmia %0, {%1, %2, %3, %4}"
^
./arch/arm/include/asm/xor.h:86:3: error: write to reserved register 'R7'
PUT_BLOCK_4(p1);
^
./arch/arm/include/asm/xor.h:42:23: note: expanded from macro 'PUT_BLOCK_4'
__asm__ __volatile__("stmia %0!, {%2, %3, %4, %5}"
^
Thumb2 uses r7 rather than r11 as the frame pointer. Let's use r10
rather than r7 for these temporaries.
Link: https://github.com/ClangBuiltLinux/linux/issues/1732
Link: https://lore.kernel.org/llvm/202210072120.V1O2SuKY-lkp@intel.com/
Reported-by: kernel test robot <lkp@intel.com>
Suggested-by: Ard Biesheuvel <ardb@kernel.org>
Reviewed-by: Ard Biesheuvel <ardb@kernel.org>
Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
| -rw-r--r-- | arch/arm/include/asm/xor.h | 4 |
1 files changed, 2 insertions, 2 deletions
diff --git a/arch/arm/include/asm/xor.h b/arch/arm/include/asm/xor.h index 669cad5194d3..934b549905f5 100644 --- a/arch/arm/include/asm/xor.h +++ b/arch/arm/include/asm/xor.h @@ -51,7 +51,7 @@ xor_arm4regs_2(unsigned long bytes, unsigned long * __restrict p1, register unsigned int a1 __asm__("r4"); register unsigned int a2 __asm__("r5"); register unsigned int a3 __asm__("r6"); - register unsigned int a4 __asm__("r7"); + register unsigned int a4 __asm__("r10"); register unsigned int b1 __asm__("r8"); register unsigned int b2 __asm__("r9"); register unsigned int b3 __asm__("ip"); @@ -73,7 +73,7 @@ xor_arm4regs_3(unsigned long bytes, unsigned long * __restrict p1, register unsigned int a1 __asm__("r4"); register unsigned int a2 __asm__("r5"); register unsigned int a3 __asm__("r6"); - register unsigned int a4 __asm__("r7"); + register unsigned int a4 __asm__("r10"); register unsigned int b1 __asm__("r8"); register unsigned int b2 __asm__("r9"); register unsigned int b3 __asm__("ip"); |