diff options
Diffstat (limited to 'arch/loongarch')
| -rw-r--r-- | arch/loongarch/Kconfig | 4 | ||||
| -rw-r--r-- | arch/loongarch/include/asm/thread_info.h | 2 | ||||
| -rw-r--r-- | arch/loongarch/kernel/stacktrace.c | 40 |
3 files changed, 46 insertions, 0 deletions
diff --git a/arch/loongarch/Kconfig b/arch/loongarch/Kconfig index 8d6725115ac6..99a0a15ce5f7 100644 --- a/arch/loongarch/Kconfig +++ b/arch/loongarch/Kconfig @@ -134,6 +134,7 @@ config LOONGARCH select HAVE_KPROBES_ON_FTRACE select HAVE_KRETPROBES select HAVE_KVM + select HAVE_LIVEPATCH select HAVE_MOD_ARCH_SPECIFIC select HAVE_NMI select HAVE_OBJTOOL if AS_HAS_EXPLICIT_RELOCS @@ -143,6 +144,7 @@ config LOONGARCH select HAVE_PERF_USER_STACK_DUMP select HAVE_PREEMPT_DYNAMIC_KEY select HAVE_REGS_AND_STACK_ACCESS_API + select HAVE_RELIABLE_STACKTRACE if UNWINDER_ORC select HAVE_RETHOOK select HAVE_RSEQ select HAVE_RUST @@ -636,6 +638,8 @@ config RANDOMIZE_BASE_MAX_OFFSET This is limited by the size of the lower address memory, 256MB. +source "kernel/livepatch/Kconfig" + endmenu config ARCH_SELECT_MEMORY_MODEL diff --git a/arch/loongarch/include/asm/thread_info.h b/arch/loongarch/include/asm/thread_info.h index 8cb653d49a54..8bf0e6f51546 100644 --- a/arch/loongarch/include/asm/thread_info.h +++ b/arch/loongarch/include/asm/thread_info.h @@ -86,6 +86,7 @@ register unsigned long current_stack_pointer __asm__("$sp"); #define TIF_LASX_CTX_LIVE 18 /* LASX context must be preserved */ #define TIF_USEDLBT 19 /* LBT was used by this task this quantum (SMP) */ #define TIF_LBT_CTX_LIVE 20 /* LBT context must be preserved */ +#define TIF_PATCH_PENDING 21 /* pending live patching update */ #define _TIF_SIGPENDING (1<<TIF_SIGPENDING) #define _TIF_NEED_RESCHED (1<<TIF_NEED_RESCHED) @@ -105,6 +106,7 @@ register unsigned long current_stack_pointer __asm__("$sp"); #define _TIF_LASX_CTX_LIVE (1<<TIF_LASX_CTX_LIVE) #define _TIF_USEDLBT (1<<TIF_USEDLBT) #define _TIF_LBT_CTX_LIVE (1<<TIF_LBT_CTX_LIVE) +#define _TIF_PATCH_PENDING (1<<TIF_PATCH_PENDING) #endif /* __KERNEL__ */ #endif /* _ASM_THREAD_INFO_H */ diff --git a/arch/loongarch/kernel/stacktrace.c b/arch/loongarch/kernel/stacktrace.c index eaec82e02c92..9a038d1070d7 100644 --- a/arch/loongarch/kernel/stacktrace.c +++ b/arch/loongarch/kernel/stacktrace.c @@ -40,6 +40,46 @@ void arch_stack_walk(stack_trace_consume_fn consume_entry, void *cookie, } } +int arch_stack_walk_reliable(stack_trace_consume_fn consume_entry, + void *cookie, struct task_struct *task) +{ + unsigned long addr; + struct pt_regs dummyregs; + struct pt_regs *regs = &dummyregs; + struct unwind_state state; + + if (task == current) { + regs->regs[3] = (unsigned long)__builtin_frame_address(0); + regs->csr_era = (unsigned long)__builtin_return_address(0); + } else { + regs->regs[3] = thread_saved_fp(task); + regs->csr_era = thread_saved_ra(task); + } + regs->regs[1] = 0; + regs->regs[22] = 0; + + for (unwind_start(&state, task, regs); + !unwind_done(&state) && !unwind_error(&state); unwind_next_frame(&state)) { + addr = unwind_get_return_address(&state); + + /* + * A NULL or invalid return address probably means there's some + * generated code which __kernel_text_address() doesn't know about. + */ + if (!addr) + return -EINVAL; + + if (!consume_entry(cookie, addr)) + return -EINVAL; + } + + /* Check for stack corruption */ + if (unwind_error(&state)) + return -EINVAL; + + return 0; +} + static int copy_stack_frame(unsigned long fp, struct stack_frame *frame) { |