linux-kernel - [PATCH 1/4] sparc: fix accurate exception reporting in copy_{from_to}

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Message-ID: <20250826160312.2070-2-kernel@mkarcher.dialup.fu-berlin.de>
Date: Tue, 26 Aug 2025 18:03:03 +0200
From: Michael Karcher <kernel@...rcher.dialup.fu-berlin.de>
To: linux-kernel@...r.kernel.org
Cc: sparclinux@...r.kernel.org,
	Michael Karcher <kernel@...rcher.dialup.fu-berlin.de>,
	Andreas Larsson <andreas@...sler.com>,
	John Paul Adrian Glaubitz <glaubitz@...sik.fu-berlin.de>,
	Anthony Yznaga <anthony.yznaga@...cle.com>
Subject: [PATCH 1/4] sparc: fix accurate exception reporting in copy_{from_to}_user for UltraSPARC

Fixes: cb736fdbb208 ("sparc64: Convert U1copy_{from,to}_user to accurate exception reporting.")
Signed-off-by: Michael Karcher <kernel@...rcher.dialup.fu-berlin.de>
---
 arch/sparc/lib/U1memcpy.S | 19 ++++++++++---------
 1 file changed, 10 insertions(+), 9 deletions(-)

diff --git a/arch/sparc/lib/U1memcpy.S b/arch/sparc/lib/U1memcpy.S
index 635398ec7540..154fbd35400c 100644
--- a/arch/sparc/lib/U1memcpy.S
+++ b/arch/sparc/lib/U1memcpy.S
@@ -164,17 +164,18 @@ ENTRY(U1_gs_40_fp)
 	retl
 	 add		%o0, %o2, %o0
 ENDPROC(U1_gs_40_fp)
-ENTRY(U1_g3_0_fp)
-	VISExitHalf
-	retl
-	 add		%g3, %o2, %o0
-ENDPROC(U1_g3_0_fp)
 ENTRY(U1_g3_8_fp)
 	VISExitHalf
 	add		%g3, 8, %g3
 	retl
 	 add		%g3, %o2, %o0
 ENDPROC(U1_g3_8_fp)
+ENTRY(U1_g3_16_fp)
+	VISExitHalf
+	add		%g3, 16, %g3
+	retl
+	 add		%g3, %o2, %o0
+ENDPROC(U1_g3_16_fp)
 ENTRY(U1_o2_0_fp)
 	VISExitHalf
 	retl
@@ -547,18 +548,18 @@ FUNC_NAME:		/* %o0=dst, %o1=src, %o2=len */
 62:	FINISH_VISCHUNK(o0, f44, f46)
 63:	UNEVEN_VISCHUNK_LAST(o0, f46, f0)
 
-93:	EX_LD_FP(LOAD(ldd, %o1, %f2), U1_g3_0_fp)
+93:	EX_LD_FP(LOAD(ldd, %o1, %f2), U1_g3_8_fp)
 	add		%o1, 8, %o1
 	subcc		%g3, 8, %g3
 	faligndata	%f0, %f2, %f8
-	EX_ST_FP(STORE(std, %f8, %o0), U1_g3_8_fp)
+	EX_ST_FP(STORE(std, %f8, %o0), U1_g3_16_fp)
 	bl,pn		%xcc, 95f
 	 add		%o0, 8, %o0
-	EX_LD_FP(LOAD(ldd, %o1, %f0), U1_g3_0_fp)
+	EX_LD_FP(LOAD(ldd, %o1, %f0), U1_g3_8_fp)
 	add		%o1, 8, %o1
 	subcc		%g3, 8, %g3
 	faligndata	%f2, %f0, %f8
-	EX_ST_FP(STORE(std, %f8, %o0), U1_g3_8_fp)
+	EX_ST_FP(STORE(std, %f8, %o0), U1_g3_16_fp)
 	bge,pt		%xcc, 93b
 	 add		%o0, 8, %o0
 
-- 
2.50.1