Libbpf does not treat paddings after functions well. If function
symbols does not cover a whole text section, it will emit error
similar to:
libbpf: sec '.text': failed to find program symbol at offset 56
Each instruction in BPF is a multiple of 8 bytes, so align the
functions to 8 bytes, similar to how clang does it.
2021-04-22 YiFei Zhu <zhuyifei1...@gmail.com>
gcc/
* config/bpf/bpf.h (FUNCTION_BOUNDARY): Set to 64.
---
gcc/config/bpf/bpf.h | 4 ++--
1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/gcc/config/bpf/bpf.h b/gcc/config/bpf/bpf.h
index ef0123b56a63..7ff2f310d583 100644
--- a/gcc/config/bpf/bpf.h
+++ b/gcc/config/bpf/bpf.h
@@ -57,8 +57,8 @@
64-bit at any time. */
#define STACK_BOUNDARY 64
-/* Function entry points are aligned to 128 bits. */
-#define FUNCTION_BOUNDARY 128
+/* Function entry points are aligned to 64 bits. */
+#define FUNCTION_BOUNDARY 64
/* Maximum alignment required by data of any type. */
#define BIGGEST_ALIGNMENT 64
--
2.31.1
