hurd: Fix CMSG_DATA on 64bit systems

sthibaul · tgross35 · commit 3659a6d7de02 · 2025-02-05T05:04:56.000-06:00
This was fixed upstream glibc in https://sourceware.org/git/?p=glibc.git;a=patch;h=cf13f740a91b5bbf6bb60a30b45c2a3933ff1259
diff --git a/src/unix/hurd/mod.rs b/src/unix/hurd/mod.rs
@@ -3449,7 +3449,7 @@ f! {
     }
 
     pub fn CMSG_DATA(cmsg: *const cmsghdr) -> *mut c_uchar {
-        cmsg.offset(1) as *mut c_uchar
+        (cmsg as *mut c_uchar).offset(CMSG_ALIGN(mem::size_of::<cmsghdr>()) as isize)
     }
 
     pub {const} fn CMSG_SPACE(length: c_uint) -> c_uint {

Original file line number	Diff line number	Diff line change
`@@ -3449,7 +3449,7 @@ f! {`
`3449`	`3449`	`}`
`3450`	`3450`
`3451`	`3451`	`pub fn CMSG_DATA(cmsg: const cmsghdr) -> mut c_uchar {`
`3452`		`- cmsg.offset(1) as *mut c_uchar`
	`3452`	`+ (cmsg as *mut c_uchar).offset(CMSG_ALIGN(mem::size_of::<cmsghdr>()) as isize)`
`3453`	`3453`	`}`
`3454`	`3454`
`3455`	`3455`	`pub {const} fn CMSG_SPACE(length: c_uint) -> c_uint {`