diff mbox series

[MINI-OS,10/12] kexec: switch read-only area to be writable again

Message ID 20250321092451.17309-11-jgross@suse.com (mailing list archive)
State New
Headers show
Series kexec: add kexec support to Mini-OS | expand

Commit Message

Jürgen Groß March 21, 2025, 9:24 a.m. UTC 
In order to allow writing the new kernel, make the readonly area
covering current kernel text writable again.

Signed-off-by: Juergen Gross <jgross@suse.com>
---
 kexec.c | 3 +++
 1 file changed, 3 insertions(+)
diff mbox series

Patch

diff --git a/kexec.c b/kexec.c
index 16a0030a..2992f58f 100644
--- a/kexec.c
+++ b/kexec.c
@@ -184,6 +184,8 @@  int kexec(void *kernel, unsigned long kernel_size, const char *cmdline)
         goto err;
     }
 
+    change_readonly(false);
+
     ret = kexec_move_used_pages(kexec_last_addr, (unsigned long)kernel,
                                 kernel_size);
     if ( ret )
@@ -193,6 +195,7 @@  int kexec(void *kernel, unsigned long kernel_size, const char *cmdline)
     ret = ENOSYS;
 
  err:
+    change_readonly(true);
     unreserve_memory_below();
     kexec_move_used_pages_undo();
     kexec_get_entry_undo();