diff options
Diffstat (limited to 'sys/amd64')
| -rw-r--r-- | sys/amd64/include/sigframe.h | 16 |
1 files changed, 12 insertions, 4 deletions
diff --git a/sys/amd64/include/sigframe.h b/sys/amd64/include/sigframe.h index 9c47915902c3..ac64ddb00130 100644 --- a/sys/amd64/include/sigframe.h +++ b/sys/amd64/include/sigframe.h @@ -29,7 +29,11 @@ */ #ifndef _MACHINE_SIGFRAME_H_ -#define _MACHINE_SIGFRAME_H_ 1 +#define _MACHINE_SIGFRAME_H_ + +/* + * Signal frames, arguments passed to application signal handlers. + */ struct osigframe { /* @@ -68,12 +72,16 @@ struct osigframe { struct sigframe { /* - * The first three members may be used by applications. + * The first four members may be used by applications. + * NOTE: The 4th argument is undocumented, ill commented + * on and seems to be somewhat BSD "standard". + * Handlers installed with sigvec may be using it. */ register_t sf_signum; register_t sf_siginfo; /* code or pointer to sf_si */ register_t sf_ucontext; /* points to sf_uc */ - register_t __spare__; /* Align sf_ahu */ + char *sf_addr; /* undocumented 4th arg */ + union { __siginfohandler_t *sf_action; __sighandler_t *sf_handler; @@ -83,4 +91,4 @@ struct sigframe { ucontext_t sf_uc; /* = *sf_ucontext */ }; -#endif /* _MACHINE_SIGFRAME_H_ */ +#endif /* !_MACHINE_SIGFRAME_H_ */ |