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From: Nicholas Piggin <npiggin@gmail.com>
To: linuxppc-dev@lists.ozlabs.org
Cc: Nicholas Piggin <npiggin@gmail.com>
Subject: [PATCH 3/7] powerpc/32/build: move got1/got2 sections out of text
Date: Thu, 15 Sep 2022 01:47:42 +1000	[thread overview]
Message-ID: <20220914154746.1122482-4-npiggin@gmail.com> (raw)
In-Reply-To: <20220914154746.1122482-1-npiggin@gmail.com>

Following the example from the binutils default linker script, move
.got1 and .got2 out of .text, to just after RO_DATA where they are in
read-only NX memory.

Signed-off-by: Nicholas Piggin <npiggin@gmail.com>
---
 arch/powerpc/kernel/vmlinux.lds.S | 21 +++++++++++----------
 1 file changed, 11 insertions(+), 10 deletions(-)

diff --git a/arch/powerpc/kernel/vmlinux.lds.S b/arch/powerpc/kernel/vmlinux.lds.S
index 90ac5ff73df2..341ac79f49a9 100644
--- a/arch/powerpc/kernel/vmlinux.lds.S
+++ b/arch/powerpc/kernel/vmlinux.lds.S
@@ -122,14 +122,6 @@ SECTIONS
 		*(.sfpr);
 		MEM_KEEP(init.text)
 		MEM_KEEP(exit.text)
-
-#ifdef CONFIG_PPC32
-		*(.got1)
-		__got2_start = .;
-		*(.got2)
-		__got2_end = .;
-#endif /* CONFIG_PPC32 */
-
 	} :text
 
 	. = ALIGN(PAGE_SIZE);
@@ -139,7 +131,16 @@ SECTIONS
 	/* Read-only data */
 	RO_DATA(PAGE_SIZE)
 
-#ifdef CONFIG_PPC64
+#ifdef CONFIG_PPC32
+	.got1 : AT(ADDR(.got1) - LOAD_OFFSET) {
+		*(.got1)
+	}
+	.got2 : AT(ADDR(.got2) - LOAD_OFFSET) {
+		__got2_start = .;
+		*(.got2)
+		__got2_end = .;
+	}
+#else /* CONFIG_PPC32 */
 	SOFT_MASK_TABLE(8)
 	RESTART_TABLE(8)
 
@@ -190,7 +191,7 @@ SECTIONS
 		*(__rfi_flush_fixup)
 		__stop___rfi_flush_fixup = .;
 	}
-#endif /* CONFIG_PPC64 */
+#endif /* CONFIG_PPC32 */
 
 #ifdef CONFIG_PPC_BARRIER_NOSPEC
 	. = ALIGN(8);
-- 
2.37.2


  parent reply	other threads:[~2022-09-14 15:50 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2022-09-14 15:47 [PATCH 0/7] powerpc: build / linker improvements Nicholas Piggin
2022-09-14 15:47 ` [PATCH 1/7] powerpc/build: put sys_call_table in .data.rel.ro if RELOCATABLE Nicholas Piggin
2022-09-15  5:53   ` Christophe Leroy
2022-09-15 12:51     ` Michael Ellerman
2022-09-16  0:30       ` Nicholas Piggin
2022-09-14 15:47 ` [PATCH 2/7] powerpc: move __end_rodata to cover arch read-only sections Nicholas Piggin
2022-09-15  5:50   ` Christophe Leroy
2022-09-15 12:47   ` Michael Ellerman
2022-09-16  0:28     ` Nicholas Piggin
2022-09-16  6:35       ` Michael Ellerman
2022-09-14 15:47 ` Nicholas Piggin [this message]
2022-09-14 15:47 ` [PATCH 4/7] powerpc/build: move got, toc, plt, branch_lt sections to read-only Nicholas Piggin
2022-09-14 15:47 ` [PATCH 5/7] powerpc/build: move .data.rel.ro, .sdata2 " Nicholas Piggin
2022-09-14 15:47 ` [PATCH 6/7] powerpc/64/build: only include .opd with ELFv1 Nicholas Piggin
2022-09-14 15:47 ` [PATCH 7/7] powerpc/64/build: merge .got and .toc input sections Nicholas Piggin

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