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From: Quentin Perret <qperret@google.com>
To: arnd@arndb.de, maz@kernel.org, catalin.marinas@arm.com, will@kernel.org
Cc: james.morse@arm.com, julien.thierry.kdev@gmail.com,
	suzuki.poulose@arm.com, ardb@kernel.org,
	linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
	linux-arm-kernel@lists.infradead.org,
	kvmarm@lists.cs.columbia.edu, kernel-team@android.com,
	qperret@google.com
Subject: [PATCH 1/2] asm-generic: export: Stub EXPORT_SYMBOL with __DISABLE_EXPORTS
Date: Wed,  3 Feb 2021 14:19:30 +0000	[thread overview]
Message-ID: <20210203141931.615898-2-qperret@google.com> (raw)
In-Reply-To: <20210203141931.615898-1-qperret@google.com>

It is currently possible to stub EXPORT_SYMBOL() macros in C code using
__DISABLE_EXPORTS, which is necessary to run in constrained environments
such as the EFI stub or the decompressor. But this currently doesn't
apply to exports from assembly, which can lead to somewhat confusing
situations.

Consolidate the __DISABLE_EXPORTS infrastructure by checking it from
asm-generic/export.h as well.

Signed-off-by: Quentin Perret <qperret@google.com>
---
 include/asm-generic/export.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/asm-generic/export.h b/include/asm-generic/export.h
index 365345f9a9e3..07a36a874dca 100644
--- a/include/asm-generic/export.h
+++ b/include/asm-generic/export.h
@@ -33,7 +33,7 @@
  */
 
 .macro ___EXPORT_SYMBOL name,val,sec
-#ifdef CONFIG_MODULES
+#if defined(CONFIG_MODULES) && !defined(__DISABLE_EXPORTS)
 	.section ___ksymtab\sec+\name,"a"
 	.balign KSYM_ALIGN
 __ksymtab_\name:
-- 
2.30.0.365.g02bc693789-goog


WARNING: multiple messages have this Message-ID (diff)
From: Quentin Perret <qperret@google.com>
To: arnd@arndb.de, maz@kernel.org, catalin.marinas@arm.com, will@kernel.org
Cc: linux-arch@vger.kernel.org, linux-kernel@vger.kernel.org,
	kvmarm@lists.cs.columbia.edu,
	linux-arm-kernel@lists.infradead.org, kernel-team@android.com,
	ardb@kernel.org
Subject: [PATCH 1/2] asm-generic: export: Stub EXPORT_SYMBOL with __DISABLE_EXPORTS
Date: Wed,  3 Feb 2021 14:19:30 +0000	[thread overview]
Message-ID: <20210203141931.615898-2-qperret@google.com> (raw)
In-Reply-To: <20210203141931.615898-1-qperret@google.com>

It is currently possible to stub EXPORT_SYMBOL() macros in C code using
__DISABLE_EXPORTS, which is necessary to run in constrained environments
such as the EFI stub or the decompressor. But this currently doesn't
apply to exports from assembly, which can lead to somewhat confusing
situations.

Consolidate the __DISABLE_EXPORTS infrastructure by checking it from
asm-generic/export.h as well.

Signed-off-by: Quentin Perret <qperret@google.com>
---
 include/asm-generic/export.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/asm-generic/export.h b/include/asm-generic/export.h
index 365345f9a9e3..07a36a874dca 100644
--- a/include/asm-generic/export.h
+++ b/include/asm-generic/export.h
@@ -33,7 +33,7 @@
  */
 
 .macro ___EXPORT_SYMBOL name,val,sec
-#ifdef CONFIG_MODULES
+#if defined(CONFIG_MODULES) && !defined(__DISABLE_EXPORTS)
 	.section ___ksymtab\sec+\name,"a"
 	.balign KSYM_ALIGN
 __ksymtab_\name:
-- 
2.30.0.365.g02bc693789-goog

_______________________________________________
kvmarm mailing list
kvmarm@lists.cs.columbia.edu
https://lists.cs.columbia.edu/mailman/listinfo/kvmarm

WARNING: multiple messages have this Message-ID (diff)
From: Quentin Perret <qperret@google.com>
To: arnd@arndb.de, maz@kernel.org, catalin.marinas@arm.com, will@kernel.org
Cc: linux-arch@vger.kernel.org, suzuki.poulose@arm.com,
	qperret@google.com, linux-kernel@vger.kernel.org,
	kvmarm@lists.cs.columbia.edu, james.morse@arm.com,
	linux-arm-kernel@lists.infradead.org, kernel-team@android.com,
	ardb@kernel.org, julien.thierry.kdev@gmail.com
Subject: [PATCH 1/2] asm-generic: export: Stub EXPORT_SYMBOL with __DISABLE_EXPORTS
Date: Wed,  3 Feb 2021 14:19:30 +0000	[thread overview]
Message-ID: <20210203141931.615898-2-qperret@google.com> (raw)
In-Reply-To: <20210203141931.615898-1-qperret@google.com>

It is currently possible to stub EXPORT_SYMBOL() macros in C code using
__DISABLE_EXPORTS, which is necessary to run in constrained environments
such as the EFI stub or the decompressor. But this currently doesn't
apply to exports from assembly, which can lead to somewhat confusing
situations.

Consolidate the __DISABLE_EXPORTS infrastructure by checking it from
asm-generic/export.h as well.

Signed-off-by: Quentin Perret <qperret@google.com>
---
 include/asm-generic/export.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/include/asm-generic/export.h b/include/asm-generic/export.h
index 365345f9a9e3..07a36a874dca 100644
--- a/include/asm-generic/export.h
+++ b/include/asm-generic/export.h
@@ -33,7 +33,7 @@
  */
 
 .macro ___EXPORT_SYMBOL name,val,sec
-#ifdef CONFIG_MODULES
+#if defined(CONFIG_MODULES) && !defined(__DISABLE_EXPORTS)
 	.section ___ksymtab\sec+\name,"a"
 	.balign KSYM_ALIGN
 __ksymtab_\name:
-- 
2.30.0.365.g02bc693789-goog


_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

  reply	other threads:[~2021-02-03 14:20 UTC|newest]

Thread overview: 15+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-02-03 14:19 [PATCH 0/2] KVM: arm64: Stub exports in nvhe code Quentin Perret
2021-02-03 14:19 ` Quentin Perret
2021-02-03 14:19 ` Quentin Perret
2021-02-03 14:19 ` Quentin Perret [this message]
2021-02-03 14:19   ` [PATCH 1/2] asm-generic: export: Stub EXPORT_SYMBOL with __DISABLE_EXPORTS Quentin Perret
2021-02-03 14:19   ` Quentin Perret
2021-02-03 15:24   ` Will Deacon
2021-02-03 15:24     ` Will Deacon
2021-02-03 15:24     ` Will Deacon
2021-02-03 14:19 ` [PATCH 2/2] KVM: arm64: Stub EXPORT_SYMBOL for nVHE EL2 code Quentin Perret
2021-02-03 14:19   ` Quentin Perret
2021-02-03 14:19   ` Quentin Perret
2021-02-03 16:43 ` [PATCH 0/2] KVM: arm64: Stub exports in nvhe code Marc Zyngier
2021-02-03 16:43   ` Marc Zyngier
2021-02-03 16:43   ` Marc Zyngier

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