bcc/tools: Introduce bpf_probe_read_user to the tools.
This is essential for architecture which do have overlapping address space.
- bpf_probe_read_kernel() shall be used for reading data from kernel space
to the bpf vm.
- bpf_probe_read_user() shall be used for reading data from user space
to the bpf vm.
Signed-off-by: Sumanth Korikkar <sumanthk@linux.ibm.com>
diff --git a/tools/lib/uthreads.py b/tools/lib/uthreads.py
index 90d0a74..9745b3d 100755
--- a/tools/lib/uthreads.py
+++ b/tools/lib/uthreads.py
@@ -80,7 +80,7 @@
bpf_usdt_readarg(1, ctx, &nameptr);
bpf_usdt_readarg(3, ctx, &id);
bpf_usdt_readarg(4, ctx, &native_id);
- bpf_probe_read(&te.name, sizeof(te.name), (void *)nameptr);
+ bpf_probe_read_user(&te.name, sizeof(te.name), (void *)nameptr);
te.runtime_id = id;
te.native_id = native_id;
__builtin_memcpy(&te.type, type, sizeof(te.type));