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Update to reflect reality.

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Reviewed by:	mini
MFC after:	3 days
This commit is contained in:
archie 2002-09-11 21:40:02 +00:00
parent b2c4f4ae74
commit 57de4fb945
2 changed files with 8 additions and 31 deletions
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5
lib/libc/sys/sigaction.2
View File

@ -460,7 +460,7 @@ There are three possible prototypes the handler may match:
.Fn handler int "int code" "struct sigcontext *scp" ;
.It POSIX SA_SIGINFO:
.Ft void
.Fn handler int "siginfo_t *info" "void *context" ;
.Fn handler int "siginfo_t *info" "ucontext_t *uap" ;
.El
.Pp
The handler function should match the SA_SIGINFO prototype if the
@ -528,7 +528,7 @@ handler points to an instance of struct
sigcontext.
.Pp
The
.Fa context
.Fa uap
argument to a POSIX SA_SIGINFO handler points to an instance of
ucontext_t.
.Sh ERRORS
@ -608,4 +608,5 @@ flags are featuring options commonly found in other operating systems.
.Xr setjmp 3 ,
.Xr siginterrupt 3 ,
.Xr sigsetops 3 ,
.Xr ucontext 3 ,
.Xr tty 4

34
lib/libc/sys/sigreturn.2
View File

@ -42,40 +42,15 @@
.Lb libc
.Sh SYNOPSIS
.In signal.h
.Pp
.Bd -literal
struct sigcontext {
int sc_onstack; /* sigstack state to restore */
int sc_mask; /* signal mask to restore */
int sc_esp; /* machine state */
int sc_ebp;
int sc_isp;
int sc_eip;
int sc_efl;
int sc_es;
int sc_ds;
int sc_cs;
int sc_ss;
int sc_edi;
int sc_esi;
int sc_ebx;
int sc_edx;
int sc_ecx;
int sc_eax;
# define sc_sp sc_esp
# define sc_fp sc_ebp
# define sc_pc sc_eip
# define sc_ps sc_efl
};
.Ed
.Ft int
.Fn sigreturn "struct sigcontext *scp"
.Fn sigreturn "ucontext_t *scp"
.Sh DESCRIPTION
.Fn Sigreturn
allows users to atomically unmask, switch stacks,
and return from a signal context.
The processes signal mask and stack status are
restored from the context.
restored from the context structure pointed to by
.Fa scp .
The system call does not return;
the users stack pointer, frame pointer, argument pointer,
and processor status longword are restored from the context.
@ -107,7 +82,8 @@ raise the privilege level of the process.
.El
.Sh SEE ALSO
.Xr sigvec 2 ,
.Xr setjmp 3
.Xr setjmp 3 ,
.Xr ucontext 3
.Sh HISTORY
The
.Fn sigreturn