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From: Yuan Tan <tanyuan@tinylab.org>
To: falcon@tinylab.org, arnd@arndb.de, linux-kernel@vger.kernel.org,
	linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org,
	luc.vanoostenryck@gmail.com, linux-sparse@vger.kernel.org
Cc: linux@weissschuh.net, palmer@rivosinc.com,
	paul.walmsley@sifive.com, paulburton@kernel.org,
	paulmck@kernel.org, tim.bird@sony.com, tsbogend@alpha.franken.de,
	w@1wt.eu, tanyuan@tinylab.org, i@maskray.me
Subject: [PATCH v1 11/14] DCE/DSE: riscv: build reference for .pushsection in C functions
Date: Sat,  4 Nov 2023 00:02:50 +0800	[thread overview]
Message-ID: <ab9af3f07b520c8679a586770e3d488cb4866e8e.1699025537.git.tanyuan@tinylab.org> (raw)
In-Reply-To: <cover.1699025537.git.tanyuan@tinylab.org>

Add the SECTION_SHF_LINK_ORDER method and the SECTION_SHF_GROUP method
to refactor __ASM_EXTABLE_RAW, so it won't produce orphan sections
anymore.

Signed-off-by: Yuan Tan <tanyuan@tinylab.org>
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
---
 arch/riscv/include/asm/asm-extable.h | 34 ++++++++++++++++++++++++++--
 1 file changed, 32 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/include/asm/asm-extable.h b/arch/riscv/include/asm/asm-extable.h
index d0be5a838242..7164d871e038 100644
--- a/arch/riscv/include/asm/asm-extable.h
+++ b/arch/riscv/include/asm/asm-extable.h
@@ -13,6 +13,21 @@
 
 #ifdef __ASSEMBLY__
 
+#if defined(CONFIG_SECTION_SHF_LINK_ORDER_SUPPORT)
+#define __ASM_EXTABLE_PUSH_SECTION			\
+	__LABEL_NAME(.L__ex_table) :			\
+	.pushsection __SECTION_NAME(__ex_table), "ao", __LABEL_NAME(.L__ex_table)
+
+#elif defined(CONFIG_SECTION_SHF_GROUP_SUPPORT)
+#define __ASM_EXTABLE_PUSH_SECTION			\
+	.attach_to_group __SECTION_NAME(__ex_table);	\
+	.pushsection __SECTION_NAME(__ex_table), "a?"
+
+#else
+#define __ASM_EXTABLE_PUSH_SECTION			\
+	.pushsection __SECTION_NAME(__ex_table), "a"
+#endif
+
 #define __ASM_EXTABLE_RAW(insn, fixup, type, data)	\
 	.pushsection	__SECTION_NAME(__ex_table), "a";		\
 	.balign		4;				\
@@ -32,8 +47,23 @@
 #include <linux/stringify.h>
 #include <asm/gpr-num.h>
 
-#define __ASM_EXTABLE_RAW(insn, fixup, type, data)	\
-	".pushsection "	__SECTION_NAME(__ex_table) ", \"a\"\n"		\
+#ifdef CONFIG_SECTION_SHF_LINK_ORDER_SUPPORT
+#define __ASM_EXTABLE_PUSH_SECTION				\
+	__LABEL_NAME(.L__ex_table) ":"				\
+	".pushsection "	__SECTION_NAME(__ex_table) ", \"ao\"," __LABEL_NAME(.L__ex_table) "\n"
+
+#elif defined(CONFIG_SECTION_SHF_GROUP_SUPPORT)
+#define __ASM_EXTABLE_PUSH_SECTION				\
+	".attach_to_group " __SECTION_NAME(__ex_table) "\n"	\
+	".pushsection "	__SECTION_NAME(__ex_table) ", \"a?\"\n"
+
+#else
+#define __ASM_EXTABLE_PUSH_SECTION				\
+	".pushsection "	__SECTION_NAME(__ex_table) ", \"a\"\n"
+#endif
+
+#define __ASM_EXTABLE_RAW(insn, fixup, type, data)		\
+	__ASM_EXTABLE_PUSH_SECTION				\
 	".balign	4\n"				\
 	".long		((" insn ") - .)\n"		\
 	".long		((" fixup ") - .)\n"		\
-- 
2.34.1


WARNING: multiple messages have this Message-ID (diff)
From: Yuan Tan <tanyuan@tinylab.org>
To: falcon@tinylab.org, arnd@arndb.de, linux-kernel@vger.kernel.org,
	linux-mips@vger.kernel.org, linux-riscv@lists.infradead.org,
	luc.vanoostenryck@gmail.com, linux-sparse@vger.kernel.org
Cc: linux@weissschuh.net, palmer@rivosinc.com,
	paul.walmsley@sifive.com, paulburton@kernel.org,
	paulmck@kernel.org, tim.bird@sony.com, tsbogend@alpha.franken.de,
	w@1wt.eu, tanyuan@tinylab.org, i@maskray.me
Subject: [PATCH v1 11/14] DCE/DSE: riscv: build reference for .pushsection in C functions
Date: Sat,  4 Nov 2023 00:02:50 +0800	[thread overview]
Message-ID: <ab9af3f07b520c8679a586770e3d488cb4866e8e.1699025537.git.tanyuan@tinylab.org> (raw)
In-Reply-To: <cover.1699025537.git.tanyuan@tinylab.org>

Add the SECTION_SHF_LINK_ORDER method and the SECTION_SHF_GROUP method
to refactor __ASM_EXTABLE_RAW, so it won't produce orphan sections
anymore.

Signed-off-by: Yuan Tan <tanyuan@tinylab.org>
Signed-off-by: Zhangjin Wu <falcon@tinylab.org>
---
 arch/riscv/include/asm/asm-extable.h | 34 ++++++++++++++++++++++++++--
 1 file changed, 32 insertions(+), 2 deletions(-)

diff --git a/arch/riscv/include/asm/asm-extable.h b/arch/riscv/include/asm/asm-extable.h
index d0be5a838242..7164d871e038 100644
--- a/arch/riscv/include/asm/asm-extable.h
+++ b/arch/riscv/include/asm/asm-extable.h
@@ -13,6 +13,21 @@
 
 #ifdef __ASSEMBLY__
 
+#if defined(CONFIG_SECTION_SHF_LINK_ORDER_SUPPORT)
+#define __ASM_EXTABLE_PUSH_SECTION			\
+	__LABEL_NAME(.L__ex_table) :			\
+	.pushsection __SECTION_NAME(__ex_table), "ao", __LABEL_NAME(.L__ex_table)
+
+#elif defined(CONFIG_SECTION_SHF_GROUP_SUPPORT)
+#define __ASM_EXTABLE_PUSH_SECTION			\
+	.attach_to_group __SECTION_NAME(__ex_table);	\
+	.pushsection __SECTION_NAME(__ex_table), "a?"
+
+#else
+#define __ASM_EXTABLE_PUSH_SECTION			\
+	.pushsection __SECTION_NAME(__ex_table), "a"
+#endif
+
 #define __ASM_EXTABLE_RAW(insn, fixup, type, data)	\
 	.pushsection	__SECTION_NAME(__ex_table), "a";		\
 	.balign		4;				\
@@ -32,8 +47,23 @@
 #include <linux/stringify.h>
 #include <asm/gpr-num.h>
 
-#define __ASM_EXTABLE_RAW(insn, fixup, type, data)	\
-	".pushsection "	__SECTION_NAME(__ex_table) ", \"a\"\n"		\
+#ifdef CONFIG_SECTION_SHF_LINK_ORDER_SUPPORT
+#define __ASM_EXTABLE_PUSH_SECTION				\
+	__LABEL_NAME(.L__ex_table) ":"				\
+	".pushsection "	__SECTION_NAME(__ex_table) ", \"ao\"," __LABEL_NAME(.L__ex_table) "\n"
+
+#elif defined(CONFIG_SECTION_SHF_GROUP_SUPPORT)
+#define __ASM_EXTABLE_PUSH_SECTION				\
+	".attach_to_group " __SECTION_NAME(__ex_table) "\n"	\
+	".pushsection "	__SECTION_NAME(__ex_table) ", \"a?\"\n"
+
+#else
+#define __ASM_EXTABLE_PUSH_SECTION				\
+	".pushsection "	__SECTION_NAME(__ex_table) ", \"a\"\n"
+#endif
+
+#define __ASM_EXTABLE_RAW(insn, fixup, type, data)		\
+	__ASM_EXTABLE_PUSH_SECTION				\
 	".balign	4\n"				\
 	".long		((" insn ") - .)\n"		\
 	".long		((" fixup ") - .)\n"		\
-- 
2.34.1


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linux-riscv mailing list
linux-riscv@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-riscv

  parent reply	other threads:[~2023-11-03 16:03 UTC|newest]

Thread overview: 41+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2023-11-03 15:56 [PATCH v1 00/14] DCE/DSE: Add Dead Syscalls Elimination support, part2 Yuan Tan
2023-11-03 15:56 ` Yuan Tan
2023-11-03 15:58 ` [PATCH v1 01/14] DCE/DSE: allow keep unique bounded sections Yuan Tan
2023-11-03 15:58   ` Yuan Tan
2023-11-03 15:58 ` [PATCH v1 02/14] compiler: add a global __QUITE_UNIQUE_ID() Yuan Tan
2023-11-03 15:58   ` Yuan Tan
2023-11-03 15:58 ` [PATCH v1 03/14] compiler: add unique __SECTION_NAME() Yuan Tan
2023-11-03 15:58   ` Yuan Tan
2023-11-03 15:59 ` [PATCH v1 04/14] compiler: add unique LABEL_NAME() Yuan Tan
2023-11-03 15:59   ` Yuan Tan
2023-11-03 15:59 ` [PATCH v1 05/14] DCE/DSE: add HAVE_SECTION_SHF_LINK_ORDER_SUPPORT option Yuan Tan
2023-11-03 15:59   ` Yuan Tan
2023-11-03 16:00 ` [PATCH v1 06/14] DCE/DSE: add HAVE_SECTION_SHF_GROUP_SUPPORT option Yuan Tan
2023-11-03 16:00   ` Yuan Tan
2023-11-03 16:00 ` [PATCH v1 07/14] DCE/DSE: add HAVE_SECTION_NO_KEEP_SUPPORT option Yuan Tan
2023-11-03 16:00   ` Yuan Tan
2023-11-03 16:00   ` Yuan Tan
2023-11-03 16:00   ` Yuan Tan
2023-11-03 16:01 ` [PATCH v1 08/14] DCE/DSE: add choice of methods to build reference for orphan sections Yuan Tan
2023-11-03 16:01   ` Yuan Tan
2023-11-05 21:35   ` Fangrui Song
2023-11-03 16:01 ` [PATCH v1 09/14] DCE/DSE: inhibit .size directive for SHF_GROUP Yuan Tan
2023-11-03 16:01   ` Yuan Tan
2023-11-05 20:50   ` Fangrui Song
2023-11-05 20:50   ` Fangrui Song
2023-11-13  7:19     ` Yuan Tan
2023-11-13  7:19       ` Yuan Tan
2023-11-03 16:02 ` [PATCH v1 10/14] DCE/DSE: riscv: make every ex_table's name unique Yuan Tan
2023-11-03 16:02   ` Yuan Tan
2023-11-03 16:02   ` Yuan Tan
2023-11-03 16:02   ` Yuan Tan
2023-11-05 21:13   ` Fangrui Song
2023-11-05 21:13   ` Fangrui Song
2023-11-03 16:02 ` Yuan Tan [this message]
2023-11-03 16:02   ` [PATCH v1 11/14] DCE/DSE: riscv: build reference for .pushsection in C functions Yuan Tan
2023-11-03 16:03 ` [PATCH v1 12/14] DCE/DSE: riscv: build reference for .pushsection in assembly Yuan Tan
2023-11-03 16:03   ` Yuan Tan
2023-11-03 16:04 ` [PATCH v1 13/14] DCE/DSE: add SECTION_NO_KEEP_SUPPORT option Yuan Tan
2023-11-03 16:04   ` Yuan Tan
2023-11-03 16:04 ` [PATCH v1 14/14] DCE/DSE: vmlinux.lds.h: allow NO_KEEP on __ex_table sections Yuan Tan
2023-11-03 16:04   ` Yuan Tan

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