diff options
Diffstat (limited to 'lib/libc')
| -rw-r--r-- | lib/libc/sys/mprotect.2 | 31 |
1 files changed, 28 insertions, 3 deletions
diff --git a/lib/libc/sys/mprotect.2 b/lib/libc/sys/mprotect.2 index 51d1b14..48fcb32 100644 --- a/lib/libc/sys/mprotect.2 +++ b/lib/libc/sys/mprotect.2 @@ -40,6 +40,7 @@ .Sh SYNOPSIS .Fd #include <sys/types.h> .Fd #include <sys/mman.h> +.Ft int .Fn mprotect "caddr_t addr" "size_t len" "int prot" .Sh DESCRIPTION The @@ -49,11 +50,35 @@ changes the specified pages to have protection .Fa prot . Not all implementations will guarantee protection on a page basis; the granularity of protection changes may be as large as an entire region. +.Sh RETURN VALUES +Upon successful completion, +.Fn mprotect +returns 0. Otherwise a value of -1 is returned +and +.Va errno +is set to indicate the error. +.Sh ERRORS +The +.Fn mprotect +function will fail if: +.Bl -tag -width Er +.It Bq Er EINVAL +The virtual address range specified by the +.Fa addr +and +.Fa len +arguments is not valid. +.It Bq Er EACCES +The calling process was not allowed to change +the protection to the value specified by +the +.Fa prot +argument. .Sh SEE ALSO -.Xr msync 2 , -.Xr munmap 2 , .Xr madvise 2 , -.Xr mincore 2 +.Xr mincore 2 , +.Xr msync 2 , +.Xr munmap 2 .Sh HISTORY The .Fn mprotect |
