git: 690601f0b4c3 - main - amd64: Add static asssert for context size

The branch main has been updated by imp:

URL: https://cgit.FreeBSD.org/src/commit/?id=690601f0b4c381b09295eecd08dfe5041d17445a

commit 690601f0b4c381b09295eecd08dfe5041d17445a
Author:     Warner Losh <imp@FreeBSD.org>
AuthorDate: 2022-02-10 21:27:01 +0000
Commit:     Warner Losh <imp@FreeBSD.org>
CommitDate: 2022-02-10 21:32:20 +0000

    amd64: Add static asssert for context size
    
    Add a static assert for the siginfo_t, mcontext_t and ucontext_t
    sizes. These are de-facto ABI options and cannot change size ever.
    
    Reviewed by:            kib
    Differential Revision:  https://reviews.freebsd.org/D34212
---
 sys/amd64/amd64/exec_machdep.c | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/sys/amd64/amd64/exec_machdep.c b/sys/amd64/amd64/exec_machdep.c
index 233f222b49f1..f66203d1812e 100644
--- a/sys/amd64/amd64/exec_machdep.c
+++ b/sys/amd64/amd64/exec_machdep.c
@@ -95,6 +95,10 @@ __FBSDID("$FreeBSD$");
 #include <machine/specialreg.h>
 #include <machine/trap.h>
 
+_Static_assert(sizeof(mcontext_t) == 800, "mcontext_t size incorrect");
+_Static_assert(sizeof(ucontext_t) == 880, "ucontext_t size incorrect");
+_Static_assert(sizeof(siginfo_t) == 80, "siginfo_t size incorrect");
+
 /*
  * Send an interrupt to process.
  *