[syserror] Split usermem package

Split usermem package to help remove syserror dependency in go_marshal.
New hostarch package contains code not dependent on syserror.

PiperOrigin-RevId: 365651233

1 files changed, 5 insertions, 4 deletions

diff --git a/pkg/sentry/syscalls/linux/vfs2/mount.go b/pkg/sentry/syscalls/linux/vfs2/mount.go
index 769c9b92f..dd93430e2 100644
--- a/pkg/sentry/syscalls/linux/vfs2/mount.go
+++ b/pkg/sentry/syscalls/linux/vfs2/mount.go
@@ -20,7 +20,8 @@ import (
 	"gvisor.dev/gvisor/pkg/sentry/kernel"
 	"gvisor.dev/gvisor/pkg/sentry/vfs"
 	"gvisor.dev/gvisor/pkg/syserror"
-	"gvisor.dev/gvisor/pkg/usermem"
+
+	"gvisor.dev/gvisor/pkg/hostarch"
 )
 
 // Mount implements Linux syscall mount(2).
@@ -33,11 +34,11 @@ func Mount(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall
 
 	// For null-terminated strings related to mount(2), Linux copies in at most
 	// a page worth of data. See fs/namespace.c:copy_mount_string().
-	fsType, err := t.CopyInString(typeAddr, usermem.PageSize)
+	fsType, err := t.CopyInString(typeAddr, hostarch.PageSize)
 	if err != nil {
 		return 0, nil, err
 	}
-	source, err := t.CopyInString(sourceAddr, usermem.PageSize)
+	source, err := t.CopyInString(sourceAddr, hostarch.PageSize)
 	if err != nil {
 		return 0, nil, err
 	}
@@ -53,7 +54,7 @@ func Mount(t *kernel.Task, args arch.SyscallArguments) (uintptr, *kernel.Syscall
 		// character placement, and the address is passed to each file system.
 		// Most file systems always treat this data as a string, though, and so
 		// do all of the ones we implement.
-		data, err = t.CopyInString(dataAddr, usermem.PageSize)
+		data, err = t.CopyInString(dataAddr, hostarch.PageSize)
 		if err != nil {
 			return 0, nil, err
 		}