From: Hailong Liu <liu.hailong6@xxxxxxxxxx>
While cross compiling on ARM32 , the casting from pointer to __u64 will
cause warnings:
samples/bpf/task_fd_query_user.c: In function 'main':
samples/bpf/task_fd_query_user.c:399:23: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
399 | uprobe_file_offset = (__u64)main - (__u64)&__executable_start;
| ^
samples/bpf/task_fd_query_user.c:399:37: warning: cast from pointer to integer of different size [-Wpointer-to-int-cast]
399 | uprobe_file_offset = (__u64)main - (__u64)&__executable_start;
Workaround this by using "unsigned long" to adapt to different ARCHs.
Signed-off-by: Hailong Liu <liu.hailong6@xxxxxxxxxx>
---
samples/bpf/task_fd_query_user.c | 2 +-
1 file changed, 1 insertion(+), 1 deletion(-)
diff --git a/samples/bpf/task_fd_query_user.c b/samples/bpf/task_fd_query_user.c
index a78025b0026b..c9a0ca8351fd 100644
--- a/samples/bpf/task_fd_query_user.c
+++ b/samples/bpf/task_fd_query_user.c
@@ -396,7 +396,7 @@ int main(int argc, char **argv)
* on different systems with different compilers. The right way is
* to parse the ELF file. We took a shortcut here.
*/
- uprobe_file_offset = (__u64)main - (__u64)&__executable_start;
+ uprobe_file_offset = (unsigned long)main - (unsigned long)&__executable_start;
CHECK_AND_RET(test_nondebug_fs_probe("uprobe", (char *)argv[0],
uprobe_file_offset, 0x0, false,
BPF_FD_TYPE_UPROBE,
--
2.25.1
