add i32 support and make it extensible

tests/c-form/i32test.bpf.c

@@ -0,0 +1,15 @@
+#include <linux/bpf.h>
+#include <bpf/bpf_helpers.h>
+
+SEC("xdp")
+int print_xdp_data(struct xdp_md *ctx)
+{
+    // 'data' is a pointer to the start of packet data
+    void *data = (void *)(long)ctx->data;
+
+    bpf_printk("ctx->data = %p\n", data);
+
+    return XDP_PASS;
+}
+
+char LICENSE[] SEC("license") = "GPL";

tests/failing_tests/vmlinux/args_test.py

@@ -0,0 +1,30 @@
+import logging
+
+from pythonbpf import bpf, section, bpfglobal, compile_to_ir
+from pythonbpf import compile  # noqa: F401
+from vmlinux import TASK_COMM_LEN  # noqa: F401
+from vmlinux import struct_trace_event_raw_sys_enter  # noqa: F401
+from ctypes import c_int64, c_int32, c_void_p  # noqa: F401
+
+
+# from vmlinux import struct_uinput_device
+# from vmlinux import struct_blk_integrity_iter
+
+
+@bpf
+@section("tracepoint/syscalls/sys_enter_execve")
+def hello_world(ctx: struct_trace_event_raw_sys_enter) -> c_int64:
+    b = ctx.args
+    c = b[0]
+    print(f"This is context args field {c}")
+    return c_int64(0)
+
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+
+compile_to_ir("args_test.py", "args_test.ll", loglevel=logging.INFO)
+compile()

tests/failing_tests/vmlinux/i32_test.py

@@ -0,0 +1,23 @@
+from ctypes import c_int64, c_int32
+from pythonbpf import bpf, section, bpfglobal, compile_to_ir, compile
+from vmlinux import struct_xdp_md
+from vmlinux import XDP_PASS
+
+
+@bpf
+@section("xdp")
+def print_xdp_data(ctx: struct_xdp_md) -> c_int64:
+    data = ctx.data  # 32-bit field: packet start pointer
+    something = c_int32(2 + data)
+    print(f"ctx->data = {something}")
+    return c_int64(XDP_PASS)
+
+
+@bpf
+@bpfglobal
+def LICENSE() -> str:
+    return "GPL"
+
+
+compile_to_ir("i32_test.py", "i32_test.ll")
+compile()

tests/passing_tests/vmlinux/simple_struct_test.py

@@ -44,4 +44,4 @@ def LICENSE() -> str:
 
 
 compile_to_ir("simple_struct_test.py", "simple_struct_test.ll", loglevel=logging.DEBUG)
-# compile()
+compile()