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From: Ard Biesheuvel <ardb@kernel.org>
To: linux@armlinux.org.uk
Cc: linux-arm-kernel@lists.infradead.org,
	Ard Biesheuvel <ardb@kernel.org>, Arnd Bergmann <arnd@arndb.de>,
	Kees Cook <keescook@chromium.org>,
	Keith Packard <keithpac@amazon.com>,
	Linus Walleij <linus.walleij@linaro.org>
Subject: [PATCH 06/10] ARM: export dump_mem() to other objects
Date: Tue, 21 Sep 2021 11:54:04 +0200	[thread overview]
Message-ID: <20210921095408.133210-7-ardb@kernel.org> (raw)
In-Reply-To: <20210921095408.133210-1-ardb@kernel.org>

The unwind info based stack unwinder will make its own call to
dump_mem() to dump the exception stack, so give it external linkage.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 arch/arm/include/asm/stacktrace.h | 2 ++
 arch/arm/kernel/traps.c           | 7 +++----
 2 files changed, 5 insertions(+), 4 deletions(-)

diff --git a/arch/arm/include/asm/stacktrace.h b/arch/arm/include/asm/stacktrace.h
index 2d76a2e29f05..e86f55155500 100644
--- a/arch/arm/include/asm/stacktrace.h
+++ b/arch/arm/include/asm/stacktrace.h
@@ -27,5 +27,7 @@ void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame)
 extern int unwind_frame(struct stackframe *frame);
 extern void walk_stackframe(struct stackframe *frame,
 			    int (*fn)(struct stackframe *, void *), void *data);
+extern void dump_mem(const char *lvl, const char *str, unsigned long bottom,
+		     unsigned long top);
 
 #endif	/* __ASM_STACKTRACE_H */
diff --git a/arch/arm/kernel/traps.c b/arch/arm/kernel/traps.c
index 195dff58bafc..e4698605bb72 100644
--- a/arch/arm/kernel/traps.c
+++ b/arch/arm/kernel/traps.c
@@ -35,6 +35,7 @@
 #include <asm/ptrace.h>
 #include <asm/unwind.h>
 #include <asm/tls.h>
+#include <asm/stacktrace.h>
 #include <asm/system_misc.h>
 #include <asm/opcodes.h>
 
@@ -60,8 +61,6 @@ static int __init user_debug_setup(char *str)
 __setup("user_debug=", user_debug_setup);
 #endif
 
-static void dump_mem(const char *, const char *, unsigned long, unsigned long);
-
 void dump_backtrace_entry(unsigned long where, unsigned long from,
 			  unsigned long frame, const char *loglvl)
 {
@@ -118,8 +117,8 @@ static int verify_stack(unsigned long sp)
 /*
  * Dump out the contents of some memory nicely...
  */
-static void dump_mem(const char *lvl, const char *str, unsigned long bottom,
-		     unsigned long top)
+void dump_mem(const char *lvl, const char *str, unsigned long bottom,
+	      unsigned long top)
 {
 	unsigned long first;
 	int i;
-- 
2.30.2


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  parent reply	other threads:[~2021-09-21  9:57 UTC|newest]

Thread overview: 14+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-09-21  9:53 [PATCH 00/10] ARM: add support for IRQ stacks Ard Biesheuvel
2021-09-21  9:53 ` [PATCH 01/10] ARM: fix incorrect use of get_kernel_nofault() Ard Biesheuvel
2021-09-21 10:39   ` Arnd Bergmann
2021-09-21 14:02   ` Russell King (Oracle)
2021-09-21 14:33     ` Ard Biesheuvel
2021-09-21  9:54 ` [PATCH 02/10] ARM: remove some dead code Ard Biesheuvel
2021-09-21  9:54 ` [PATCH 03/10] ARM: assembler: introduce bl_r and bl_m macros Ard Biesheuvel
2021-09-21  9:54 ` [PATCH 04/10] ARM: optimize indirect call to handle_arch_irq for v7 cores Ard Biesheuvel
2021-09-21  9:54 ` [PATCH 05/10] ARM: unwind: support unwinding across multiple stacks Ard Biesheuvel
2021-09-21  9:54 ` Ard Biesheuvel [this message]
2021-09-21  9:54 ` [PATCH 07/10] ARM: unwind: dump exception stack from calling frame Ard Biesheuvel
2021-09-21  9:54 ` [PATCH 08/10] ARM: implement IRQ stacks Ard Biesheuvel
2021-09-21  9:54 ` [PATCH 09/10] ARM: call_with_stack: add unwind support Ard Biesheuvel
2021-09-21  9:54 ` [PATCH 10/10] ARM: run softirqs on the per-CPU IRQ stack Ard Biesheuvel

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