diff mbox series

[v3,13/19] modpost: Warn about calls from __pitext into other text sections

Message ID 20240129180502.4069817-34-ardb+git@google.com
State New
Headers
Series x86: Confine early 1:1 mapped startup code |

Commit Message

Ard Biesheuvel Jan. 29, 2024, 6:05 p.m. UTC 
  From: Ard Biesheuvel <ardb@kernel.org>

Ensure that code that is marked as being able to safely run from a 1:1
mapping does not call into other code which might lack that property.

Signed-off-by: Ard Biesheuvel <ardb@kernel.org>
---
 scripts/mod/modpost.c | 6 ++++++
 1 file changed, 6 insertions(+)
diff mbox series

Patch

diff --git a/scripts/mod/modpost.c b/scripts/mod/modpost.c
index 962d00df47ab..33b56d6b4e7b 100644
--- a/scripts/mod/modpost.c
+++ b/scripts/mod/modpost.c
@@ -825,6 +825,7 @@  enum mismatch {
 	ANY_INIT_TO_ANY_EXIT,
 	ANY_EXIT_TO_ANY_INIT,
 	EXTABLE_TO_NON_TEXT,
+	PI_TEXT_TO_NON_PI_TEXT,
 };
 
 /**
@@ -887,6 +888,11 @@  static const struct sectioncheck sectioncheck[] = {
 	.bad_tosec = { ".altinstr_replacement", NULL },
 	.good_tosec = {ALL_TEXT_SECTIONS , NULL},
 	.mismatch = EXTABLE_TO_NON_TEXT,
+},
+{
+	.fromsec = { ALL_PI_TEXT_SECTIONS, NULL },
+	.bad_tosec = { ALL_NON_PI_TEXT_SECTIONS, NULL },
+	.mismatch = PI_TEXT_TO_NON_PI_TEXT,
 }
 };