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charset="us-ascii" Content-Transfer-Encoding: 7bit Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.org Like commit 5aa6b70ed182 ("arm: print alloc free paths for address in registers") already does for 32-bit ARM, print available provenance information for addresses in registers in case of internal error as a debugging aid: Unable to handle kernel write to read-only memory at virtual address ffffffc00117cd5c ... x2 : 0000000000001b98 x1 : 0000000000000000 x0 : ffffffc00117cd5c ... Register x0 information: 14-page vmalloc region starting at 0xffffffc00117a000 allocated at load_module+0x15c4/0x2bc0 Register x1 information: NULL pointer Register x2 information: non-paged memory ... Signed-off-by: Stefan Wiehler --- arch/arm64/include/asm/system_misc.h | 1 + arch/arm64/kernel/process.c | 11 +++++++++++ arch/arm64/kernel/traps.c | 1 + 3 files changed, 13 insertions(+) diff --git a/arch/arm64/include/asm/system_misc.h b/arch/arm64/include/asm/system_misc.h index c34344256762..5b9b02fee988 100644 --- a/arch/arm64/include/asm/system_misc.h +++ b/arch/arm64/include/asm/system_misc.h @@ -31,6 +31,7 @@ void hook_debug_fault_code(int nr, int (*fn)(unsigned long, unsigned long, struct mm_struct; extern void __show_regs(struct pt_regs *); +extern void __show_regs_alloc_free(struct pt_regs *); #endif /* __ASSEMBLY__ */ diff --git a/arch/arm64/kernel/process.c b/arch/arm64/kernel/process.c index 7387b68c745b..b6fc2ac6e007 100644 --- a/arch/arm64/kernel/process.c +++ b/arch/arm64/kernel/process.c @@ -197,6 +197,17 @@ static void print_pstate(struct pt_regs *regs) } } +void __show_regs_alloc_free(struct pt_regs *regs) +{ + int i; + + /* check for x0 - x29 only */ + for (i = 0; i < 30; i++) { + pr_alert("Register x%d information:", i); + mem_dump_obj((void *)regs->regs[i]); + } +} + void __show_regs(struct pt_regs *regs) { int i, top_reg; diff --git a/arch/arm64/kernel/traps.c b/arch/arm64/kernel/traps.c index 215e6d7f2df8..b7bf22f1b33f 100644 --- a/arch/arm64/kernel/traps.c +++ b/arch/arm64/kernel/traps.c @@ -197,6 +197,7 @@ static int __die(const char *str, long err, struct pt_regs *regs) print_modules(); show_regs(regs); + __show_regs_alloc_free(regs); dump_kernel_instr(KERN_EMERG, regs); -- 2.42.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel