diff options
| author | Al Viro <viro@zeniv.linux.org.uk> | 2012-11-06 13:28:21 -0500 |
|---|---|---|
| committer | Al Viro <viro@zeniv.linux.org.uk> | 2013-02-03 15:09:26 -0500 |
| commit | 5a1b98d3096f1d780045f9be812335ad77aed93d (patch) | |
| tree | 8a7dd49d3ed891d3d2f6cd47f972fee36ecaf325 /include/linux/sched.h | |
| parent | 2ce5da17570771330f44ac993b77749debf7954b (diff) | |
| download | lwn-5a1b98d3096f1d780045f9be812335ad77aed93d.tar.gz lwn-5a1b98d3096f1d780045f9be812335ad77aed93d.zip | |
new helper: sigsp()
Normal logics for altstack handling in sigframe allocation
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'include/linux/sched.h')
| -rw-r--r-- | include/linux/sched.h | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/include/linux/sched.h b/include/linux/sched.h index 6fc8f45de4e9..8f983293b403 100644 --- a/include/linux/sched.h +++ b/include/linux/sched.h @@ -2305,6 +2305,17 @@ static inline int sas_ss_flags(unsigned long sp) : on_sig_stack(sp) ? SS_ONSTACK : 0); } +static inline unsigned long sigsp(unsigned long sp, struct ksignal *ksig) +{ + if (unlikely((ksig->ka.sa.sa_flags & SA_ONSTACK)) && ! sas_ss_flags(sp)) +#ifdef CONFIG_STACK_GROWSUP + return current->sas_ss_sp; +#else + return current->sas_ss_sp + current->sas_ss_size; +#endif + return sp; +} + /* * Routines for handling mm_structs */ |