git: fb421e96c030 - main - Make arm64 pcb padding explicit

The branch main has been updated by andrew:

URL: https://cgit.FreeBSD.org/src/commit/?id=fb421e96c03087ef9e02e64232763906b6da88ae

commit fb421e96c03087ef9e02e64232763906b6da88ae
Author:     Andrew Turner <andrew@FreeBSD.org>
AuthorDate: 2023-04-24 09:57:06 +0000
Commit:     Andrew Turner <andrew@FreeBSD.org>
CommitDate: 2023-04-24 11:33:50 +0000

    Make arm64 pcb padding explicit
    
    There is padding between some fields. Mark those I have found so they
    can be reused later if needed.
    
    Sponsored by:   Arm Ltd
---
 sys/arm64/arm64/machdep.c | 6 ++++++
 sys/arm64/include/pcb.h   | 2 ++
 2 files changed, 8 insertions(+)

diff --git a/sys/arm64/arm64/machdep.c b/sys/arm64/arm64/machdep.c
index d9ea06952c54..4aac339b1a1b 100644
--- a/sys/arm64/arm64/machdep.c
+++ b/sys/arm64/arm64/machdep.c
@@ -104,6 +104,12 @@ __FBSDID("$FreeBSD$");
 
 #include <dev/smbios/smbios.h>
 
+_Static_assert(sizeof(struct pcb) == 1216, "struct pcb is incorrect size");
+_Static_assert(offsetof(struct pcb, pcb_fpusaved) == 136,
+    "pcb_fpusaved changed offset");
+_Static_assert(offsetof(struct pcb, pcb_fpustate) == 160,
+    "pcb_fpustate changed offset");
+
 enum arm64_bus arm64_bus_method = ARM64_BUS_NONE;
 
 /*
diff --git a/sys/arm64/include/pcb.h b/sys/arm64/include/pcb.h
index 8ffe6f2d483e..35f04787c781 100644
--- a/sys/arm64/include/pcb.h
+++ b/sys/arm64/include/pcb.h
@@ -57,6 +57,7 @@ struct pcb {
 	u_int		pcb_flags;
 #define	PCB_SINGLE_STEP_SHIFT	0
 #define	PCB_SINGLE_STEP		(1 << PCB_SINGLE_STEP_SHIFT)
+	uint32_t	pcb_pad1;
 
 	struct vfpstate	*pcb_fpusaved;
 	int		pcb_fpflags;
@@ -66,6 +67,7 @@ struct pcb {
 /* The bits passed to userspace in get_fpcontext */
 #define	PCB_FP_USERMASK	(PCB_FP_STARTED)
 	u_int		pcb_vfpcpu;	/* Last cpu this thread ran VFP code */
+	uint64_t	pcb_pad2;
 
 	/*
 	 * The userspace VFP state. The pcb_fpusaved pointer will point to