diff --git a/fs/pstore/ftrace.c b/fs/pstore/ftrace.c index 13db123beac1..f937c6a33bea 100644 --- a/fs/pstore/ftrace.c +++ b/fs/pstore/ftrace.c @@ -18,11 +18,35 @@ #include #include #include +#include #include "internal.h" /* This doesn't need to be atomic: speed is chosen over correctness here. */ static u64 pstore_ftrace_stamp; +static inline unsigned long adjust_ip(unsigned long ip) +{ +#if defined(CONFIG_RANDOMIZE_BASE) && !defined(PSTORE_CPU_IN_IP) && IS_BUILTIN(CONFIG_PSTORE) + if (core_kernel_text(ip)) + return ip - kaslr_offset(); + + __clear_bit(BITS_PER_LONG - 1, &ip); +#endif + return ip; +} + +inline unsigned long decode_ip(unsigned long ip) +{ +#if defined(CONFIG_RANDOMIZE_BASE) && !defined(PSTORE_CPU_IN_IP) && IS_BUILTIN(CONFIG_PSTORE) + if (test_bit(BITS_PER_LONG - 1, &ip)) + return ip + kaslr_offset(); + + __set_bit(BITS_PER_LONG - 1, &ip); + +#endif + return ip; +} + static void notrace pstore_ftrace_call(unsigned long ip, unsigned long parent_ip, struct ftrace_ops *op, @@ -47,8 +71,8 @@ static void notrace pstore_ftrace_call(unsigned long ip, local_irq_save(flags); - rec.ip = ip; - rec.parent_ip = parent_ip; + rec.ip = adjust_ip(ip); + rec.parent_ip = adjust_ip(parent_ip); pstore_ftrace_write_timestamp(&rec, pstore_ftrace_stamp++); pstore_ftrace_encode_cpu(&rec, raw_smp_processor_id()); psinfo->write(&record); diff --git a/fs/pstore/inode.c b/fs/pstore/inode.c index d0ca91040591..cf499ba72702 100644 --- a/fs/pstore/inode.c +++ b/fs/pstore/inode.c @@ -105,17 +105,19 @@ static int pstore_ftrace_seq_show(struct seq_file *s, void *v) struct pstore_private *ps = s->private; struct pstore_ftrace_seq_data *data = v; struct pstore_ftrace_record *rec; + unsigned long ip, parent_ip; if (!data) return 0; rec = (struct pstore_ftrace_record *)(ps->record->buf + data->off); + ip = decode_ip(rec->ip); + parent_ip = decode_ip(rec->parent_ip); seq_printf(s, "CPU:%d ts:%llu %08lx %08lx %ps <- %pS\n", pstore_ftrace_decode_cpu(rec), pstore_ftrace_read_timestamp(rec), - rec->ip, rec->parent_ip, (void *)rec->ip, - (void *)rec->parent_ip); + ip, parent_ip, (void *)ip, (void *)parent_ip); return 0; } diff --git a/fs/pstore/internal.h b/fs/pstore/internal.h index a0fc51196910..079284120db9 100644 --- a/fs/pstore/internal.h +++ b/fs/pstore/internal.h @@ -9,6 +9,7 @@ extern unsigned int kmsg_bytes; #ifdef CONFIG_PSTORE_FTRACE +extern unsigned long decode_ip(unsigned long ip); extern void pstore_register_ftrace(void); extern void pstore_unregister_ftrace(void); ssize_t pstore_ftrace_combine_log(char **dest_log, size_t *dest_log_size, @@ -16,6 +17,7 @@ ssize_t pstore_ftrace_combine_log(char **dest_log, size_t *dest_log_size, #else static inline void pstore_register_ftrace(void) {} static inline void pstore_unregister_ftrace(void) {} +static inline unsigned long decode_ip(unsigned long ip) { return ip; } static inline ssize_t pstore_ftrace_combine_log(char **dest_log, size_t *dest_log_size, const char *src_log, size_t src_log_size)