Building on Debian sid with GCC 15 fails:
CC libc-gcs
libc-gcs.c: In function 'ptrace_read_write':
libc-gcs.c:142:25: error: storage size of 'child_gcs' isn't known
142 | struct user_gcs child_gcs;
| ^~~~~~~~~
libc-gcs.c:142:25: warning: unused variable 'child_gcs' [-Wunused-variable]
For GCC-15, NT_ARM_GCS is defined in the libc header, causing gcs-util.h
to skip its fallback definition of struct user_gcs. This leads to the
compiler error.
Fix this by including <asm/ptrace.h> to provide the proper definition.
Fixes: a505a52b4e29 ("kselftest/arm64: Add a GCS test program built with the
system libc")
Signed-off-by: Leo Yan <[email protected]>
---
Changes in v2:
- Refined commit log (Mark Brown).
- Moving header to gcs-util.h (Mark Brown).
- Link to v1:
https://lore.kernel.org/r/[email protected]
---
tools/testing/selftests/arm64/gcs/gcs-util.h | 1 +
1 file changed, 1 insertion(+)
diff --git a/tools/testing/selftests/arm64/gcs/gcs-util.h
b/tools/testing/selftests/arm64/gcs/gcs-util.h
index
c99a6b39ac147b4efbc9b5fbadb43daf4da2c85e..f583d4dbd0bfd964e08cf40b3951664c70bb031a
100644
--- a/tools/testing/selftests/arm64/gcs/gcs-util.h
+++ b/tools/testing/selftests/arm64/gcs/gcs-util.h
@@ -7,6 +7,7 @@
#define GCS_UTIL_H
#include <stdbool.h>
+#include <asm/ptrace.h>
#ifndef __NR_map_shadow_stack
#define __NR_map_shadow_stack 453
---
base-commit: 4ee64205ffaa587e8114d84a67ac721399ccb369
change-id: 20260421-selftests_arm64_gcc15-15f6f6d07dd8
Best regards,
--
Leo Yan <[email protected]>
