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From: Heiko Carstens <hca@linux.ibm.com>
To: Alexander Gordeev <agordeev@linux.ibm.com>,
	Sven Schnelle <svens@linux.ibm.com>,
	Vasily Gorbik <gor@linux.ibm.com>,
	Christian Borntraeger <borntraeger@linux.ibm.com>,
	Niklas Schnelle <schnelle@linux.ibm.com>,
	Matthew Rosato <mjrosato@linux.ibm.com>,
	Gerald Schaefer <gerald.schaefer@linux.ibm.com>,
	Vineeth Vijayan <vneethv@linux.ibm.com>,
	Peter Oberparleiter <oberpar@linux.ibm.com>,
	Harald Freudenberger <freude@linux.ibm.com>,
	Holger Dengler <dengler@linux.ibm.com>,
	Stefan Haberland <sth@linux.ibm.com>,
	Jan Hoeppner <hoeppner@linux.ibm.com>,
	Ilya Leoshkevich <iii@linux.ibm.com>,
	Janosch Frank <frankja@linux.ibm.com>,
	Claudio Imbrenda <imbrenda@linux.ibm.com>
Cc: linux-kernel@vger.kernel.org, linux-s390@vger.kernel.org
Subject: [PATCH 10/32] s390/diag: Convert amode31 exception tables to EX_TABLE_INSN
Date: Thu,  1 Oct 2026 12:32:25 +0200	[thread overview]
Message-ID: <20261001103247.1989111-11-hca@linux.ibm.com> (raw)
In-Reply-To: <20261001103247.1989111-1-hca@linux.ibm.com>

Convert all amode31 exception table entries to use EX_TABLE_INSN.
With EX_TABLE_INSN entries always point to the faulting instruction,
so named labels are replaced with numeric labels.

Signed-off-by: Heiko Carstens <hca@linux.ibm.com>
---
 arch/s390/kernel/text_amode31.S | 34 ++++++++++++++-------------------
 1 file changed, 14 insertions(+), 20 deletions(-)

diff --git a/arch/s390/kernel/text_amode31.S b/arch/s390/kernel/text_amode31.S
index f007d892d0c5..7761de491443 100644
--- a/arch/s390/kernel/text_amode31.S
+++ b/arch/s390/kernel/text_amode31.S
@@ -19,9 +19,9 @@
  * affects a few functions that are not performance-relevant.
  */
 	.macro BR_EX_AMODE31_r14
-	exrl	0,0f
+	exrl	0,555f
 	j	.
-0:	br	%r14
+555:	br	%r14
 	.endm
 
 /*
@@ -33,15 +33,13 @@ SYM_TYPED_FUNC_START(_diag14_amode31)
 	lgr	%r3,%r4
 	lhi	%r5,-EIO
 	sam31
-	diag	%r1,%r2,0x14
-.Ldiag14_ex:
+0:	diag	%r1,%r2,0x14
 	ipm	%r5
 	srl	%r5,28
-.Ldiag14_fault:
-	sam64
+1:	sam64
 	lgfr	%r2,%r5
 	BR_EX_AMODE31_r14
-	EX_TABLE_AMODE31(.Ldiag14_ex, .Ldiag14_fault)
+	EX_TABLE_INSN_AMODE31(0b, 1b)
 SYM_FUNC_END(_diag14_amode31)
 
 /*
@@ -51,15 +49,13 @@ SYM_TYPED_FUNC_START(_diag210_amode31)
 	lgr	%r1,%r2
 	lhi	%r2,-1
 	sam31
-	diag	%r1,%r0,0x210
-.Ldiag210_ex:
+0:	diag	%r1,%r0,0x210
 	ipm	%r2
 	srl	%r2,28
-.Ldiag210_fault:
-	sam64
+1:	sam64
 	lgfr	%r2,%r2
 	BR_EX_AMODE31_r14
-	EX_TABLE_AMODE31(.Ldiag210_ex, .Ldiag210_fault)
+	EX_TABLE_INSN_AMODE31(0b, 1b)
 SYM_FUNC_END(_diag210_amode31)
 
 /*
@@ -68,12 +64,11 @@ SYM_FUNC_END(_diag210_amode31)
 SYM_TYPED_FUNC_START(_diag8c_amode31)
 	llgf	%r3,0(%r3)
 	sam31
-	diag	%r2,%r4,0x8c
-.Ldiag8c_ex:
-	sam64
+0:	diag	%r2,%r4,0x8c
+1:	sam64
 	lgfr	%r2,%r3
 	BR_EX_AMODE31_r14
-	EX_TABLE_AMODE31(.Ldiag8c_ex, .Ldiag8c_ex)
+	EX_TABLE_INSN_AMODE31(0b, 1b)
 SYM_FUNC_END(_diag8c_amode31)
 /*
  * int _diag26c_amode31(void *req, void *resp, enum diag26c_sc subcode)
@@ -81,12 +76,11 @@ SYM_FUNC_END(_diag8c_amode31)
 SYM_TYPED_FUNC_START(_diag26c_amode31)
 	lghi	%r5,-EOPNOTSUPP
 	sam31
-	diag	%r2,%r4,0x26c
-.Ldiag26c_ex:
-	sam64
+0:	diag	%r2,%r4,0x26c
+1:	sam64
 	lgfr	%r2,%r5
 	BR_EX_AMODE31_r14
-	EX_TABLE_AMODE31(.Ldiag26c_ex, .Ldiag26c_ex)
+	EX_TABLE_INSN_AMODE31(0b, 1b)
 SYM_FUNC_END(_diag26c_amode31)
 
 /*
-- 
2.53.0


  parent reply	other threads:[~2026-10-01 10:33 UTC|newest]

Thread overview: 33+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-10-01 10:32 [PATCH 00/32] s390: Improve exception table handling and disassembler Heiko Carstens
2026-10-01 10:32 ` [PATCH 01/32] s390/kprobes: Prevent kprobes on instructions with exception table entry Heiko Carstens
2026-10-01 10:32 ` [PATCH 02/32] s390/early: Fix early warning handling Heiko Carstens
2026-10-01 10:32 ` [PATCH 03/32] s390: Clear pt_regs flags field Heiko Carstens
2026-10-01 10:32 ` [PATCH 04/32] s390/bug: Indicate modified PSW in disassembly Heiko Carstens
2026-10-01 10:32 ` [PATCH 05/32] s390/tools: Rename gen_facilities to gen_bitmaps Heiko Carstens
2026-10-01 10:32 ` [PATCH 06/32] s390/tools: Generate bitmap of nullified program checks Heiko Carstens
2026-10-01 10:32 ` [PATCH 07/32] s390/traps: Handle nullifying program checks in get_trap_ip() Heiko Carstens
2026-10-01 10:32 ` [PATCH 08/32] s390/dis: Improve show_code() output Heiko Carstens
2026-10-01 10:32 ` [PATCH 09/32] s390/extable: Rework exception handling logic Heiko Carstens
2026-10-01 10:32 ` Heiko Carstens [this message]
2026-10-01 10:32 ` [PATCH 11/32] s390/uaccess: Convert inline assembly to EX_TABLE_INSN Heiko Carstens
2026-10-01 10:32 ` [PATCH 12/32] s390/lib/uaccess: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 13/32] s390/futex: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 14/32] s390/diag: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 15/32] s390/mm/pfault: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 16/32] s390/cpu_mf: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 17/32] s390/cert_store: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 18/32] s390/ipl: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 19/32] s390/hypfs: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 20/32] s390/ap: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 21/32] s390/fpu: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 22/32] s390/traps: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 23/32] s390/word-at-a-time: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 24/32] s390/kvm: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 25/32] s390/pci: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 26/32] s390/boot: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 27/32] s390/cio: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 28/32] s390/dasd: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 29/32] s390/diag_ftp: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 30/32] s390/sclp: " Heiko Carstens
2026-10-01 10:32 ` [PATCH 31/32] s390/bpf: Simplify exception table entry handling Heiko Carstens
2026-10-01 10:32 ` [PATCH 32/32] s390/extable: Remove EX_TABLE macros and fallback extable search Heiko Carstens

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