diff options
Diffstat (limited to 'include/linux/uprobes.h')
| -rw-r--r-- | include/linux/uprobes.h | 19 |
1 files changed, 16 insertions, 3 deletions
diff --git a/include/linux/uprobes.h b/include/linux/uprobes.h index e0a4c2082245..2e46b69ff0a6 100644 --- a/include/linux/uprobes.h +++ b/include/linux/uprobes.h @@ -16,6 +16,7 @@ #include <linux/types.h> #include <linux/wait.h> #include <linux/timer.h> +#include <linux/seqlock.h> struct uprobe; struct vm_area_struct; @@ -38,6 +39,8 @@ struct page; #define MAX_URETPROBE_DEPTH 64 +#define UPROBE_NO_TRAMPOLINE_VADDR (~0UL) + struct uprobe_consumer { /* * handler() can return UPROBE_HANDLER_REMOVE to signal the need to @@ -124,6 +127,10 @@ struct uprobe_task { unsigned int depth; struct return_instance *return_instances; + struct return_instance *ri_pool; + struct timer_list ri_timer; + seqcount_t ri_seqcount; + union { struct { struct arch_uprobe_task autask; @@ -137,8 +144,8 @@ struct uprobe_task { }; struct uprobe *active_uprobe; - struct timer_list ri_timer; unsigned long xol_vaddr; + bool signal_denied; struct arch_uprobe *auprobe; }; @@ -154,12 +161,18 @@ struct return_instance { unsigned long stack; /* stack pointer */ unsigned long orig_ret_vaddr; /* original return address */ bool chained; /* true, if instance is nested */ - int consumers_cnt; + int cons_cnt; /* total number of session consumers */ struct return_instance *next; /* keep as stack */ struct rcu_head rcu; - struct return_consumer consumers[] __counted_by(consumers_cnt); + /* singular pre-allocated return_consumer instance for common case */ + struct return_consumer consumer; + /* + * extra return_consumer instances for rare cases of multiple session consumers, + * contains (cons_cnt - 1) elements + */ + struct return_consumer *extra_consumers; } ____cacheline_aligned; enum rp_check { |