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ARM: export dump_mem() to other objects 

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>
Reviewed-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Linus Walleij <linus.walleij@linaro.org>
Tested-by: Keith Packard <keithpac@amazon.com>
Tested-by: Marc Zyngier <maz@kernel.org>
Tested-by: Vladimir Murzin <vladimir.murzin@arm.com> # ARMv7M
This commit is contained in:
Ard Biesheuvel 2021-10-05 09:15:38 +02:00
parent b6506981f8
commit 8cdfdf7fe4
2 changed files with 5 additions and 4 deletions
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2
arch/arm/include/asm/stacktrace.h
View File

@ -36,5 +36,7 @@ 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 */

7
arch/arm/kernel/traps.c
View File

@ -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;